/*
Trix 2.1.12
Copyright © 2024 37signals, LLC
 */
(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.Trix = factory());
})(this, (function () { 'use strict';

  var name = "trix";
  var version = "2.1.12";
  var description = "A rich text editor for everyday writing";
  var main = "dist/trix.umd.min.js";
  var module = "dist/trix.esm.min.js";
  var style = "dist/trix.css";
  var files = [
  	"dist/*.css",
  	"dist/*.js",
  	"dist/*.map",
  	"src/{inspector,trix}/*.js"
  ];
  var repository = {
  	type: "git",
  	url: "git+https://github.com/basecamp/trix.git"
  };
  var keywords = [
  	"rich text",
  	"wysiwyg",
  	"editor"
  ];
  var author = "37signals, LLC";
  var license = "MIT";
  var bugs = {
  	url: "https://github.com/basecamp/trix/issues"
  };
  var homepage = "https://trix-editor.org/";
  var devDependencies = {
  	"@babel/core": "^7.16.0",
  	"@babel/preset-env": "^7.16.4",
  	"@rollup/plugin-babel": "^5.3.0",
  	"@rollup/plugin-commonjs": "^22.0.2",
  	"@rollup/plugin-json": "^4.1.0",
  	"@rollup/plugin-node-resolve": "^13.3.0",
  	"@web/dev-server": "^0.1.34",
  	"babel-eslint": "^10.1.0",
  	chokidar: "^4.0.2",
  	concurrently: "^7.4.0",
  	eslint: "^7.32.0",
  	esm: "^3.2.25",
  	karma: "6.4.1",
  	"karma-chrome-launcher": "3.2.0",
  	"karma-qunit": "^4.1.2",
  	"karma-sauce-launcher": "^4.3.6",
  	qunit: "2.19.1",
  	rangy: "^1.3.0",
  	rollup: "^2.56.3",
  	"rollup-plugin-includepaths": "^0.2.4",
  	"rollup-plugin-terser": "^7.0.2",
  	sass: "^1.83.0",
  	svgo: "^2.8.0",
  	webdriverio: "^7.19.5"
  };
  var resolutions = {
  	webdriverio: "^7.19.5"
  };
  var scripts = {
  	"build-css": "bin/sass-build assets/trix.scss dist/trix.css",
  	"build-js": "rollup -c",
  	"build-assets": "cp -f assets/*.html dist/",
  	build: "yarn run build-js && yarn run build-css && yarn run build-assets",
  	watch: "rollup -c -w",
  	lint: "eslint .",
  	pretest: "yarn run lint && yarn run build",
  	test: "karma start",
  	prerelease: "yarn version && yarn test",
  	release: "npm adduser && npm publish",
  	postrelease: "git push && git push --tags",
  	dev: "web-dev-server --app-index index.html  --root-dir dist --node-resolve --open",
  	start: "yarn build-assets && concurrently --kill-others --names js,css,dev-server 'yarn watch' 'yarn build-css --watch' 'yarn dev'"
  };
  var dependencies = {
  	dompurify: "^3.2.3"
  };
  var _package = {
  	name: name,
  	version: version,
  	description: description,
  	main: main,
  	module: module,
  	style: style,
  	files: files,
  	repository: repository,
  	keywords: keywords,
  	author: author,
  	license: license,
  	bugs: bugs,
  	homepage: homepage,
  	devDependencies: devDependencies,
  	resolutions: resolutions,
  	scripts: scripts,
  	dependencies: dependencies
  };

  const attachmentSelector = "[data-trix-attachment]";
  const attachments = {
    preview: {
      presentation: "gallery",
      caption: {
        name: true,
        size: true
      }
    },
    file: {
      caption: {
        size: true
      }
    }
  };

  const attributes = {
    default: {
      tagName: "div",
      parse: false
    },
    quote: {
      tagName: "blockquote",
      nestable: true
    },
    heading1: {
      tagName: "h1",
      terminal: true,
      breakOnReturn: true,
      group: false
    },
    code: {
      tagName: "pre",
      terminal: true,
      htmlAttributes: ["language"],
      text: {
        plaintext: true
      }
    },
    bulletList: {
      tagName: "ul",
      parse: false
    },
    bullet: {
      tagName: "li",
      listAttribute: "bulletList",
      group: false,
      nestable: true,
      test(element) {
        return tagName$1(element.parentNode) === attributes[this.listAttribute].tagName;
      }
    },
    numberList: {
      tagName: "ol",
      parse: false
    },
    number: {
      tagName: "li",
      listAttribute: "numberList",
      group: false,
      nestable: true,
      test(element) {
        return tagName$1(element.parentNode) === attributes[this.listAttribute].tagName;
      }
    },
    attachmentGallery: {
      tagName: "div",
      exclusive: true,
      terminal: true,
      parse: false,
      group: false
    }
  };
  const tagName$1 = element => {
    var _element$tagName;
    return element === null || element === void 0 || (_element$tagName = element.tagName) === null || _element$tagName === void 0 ? void 0 : _element$tagName.toLowerCase();
  };

  const androidVersionMatch = navigator.userAgent.match(/android\s([0-9]+.*Chrome)/i);
  const androidVersion = androidVersionMatch && parseInt(androidVersionMatch[1]);
  var browser$1 = {
    // Android emits composition events when moving the cursor through existing text
    // Introduced in Chrome 65: https://bugs.chromium.org/p/chromium/issues/detail?id=764439#c9
    composesExistingText: /Android.*Chrome/.test(navigator.userAgent),
    // Android 13, especially on Samsung keyboards, emits extra compositionend and beforeinput events
    // that can make the input handler lose the current selection or enter an infinite input -> render -> input
    // loop.
    recentAndroid: androidVersion && androidVersion > 12,
    samsungAndroid: androidVersion && navigator.userAgent.match(/Android.*SM-/),
    // IE 11 activates resizing handles on editable elements that have "layout"
    forcesObjectResizing: /Trident.*rv:11/.test(navigator.userAgent),
    // https://www.w3.org/TR/input-events-1/ + https://www.w3.org/TR/input-events-2/
    supportsInputEvents: typeof InputEvent !== "undefined" && ["data", "getTargetRanges", "inputType"].every(prop => prop in InputEvent.prototype)
  };

  var css$3 = {
    attachment: "attachment",
    attachmentCaption: "attachment__caption",
    attachmentCaptionEditor: "attachment__caption-editor",
    attachmentMetadata: "attachment__metadata",
    attachmentMetadataContainer: "attachment__metadata-container",
    attachmentName: "attachment__name",
    attachmentProgress: "attachment__progress",
    attachmentSize: "attachment__size",
    attachmentToolbar: "attachment__toolbar",
    attachmentGallery: "attachment-gallery"
  };

  var dompurify = {
    ADD_ATTR: ["language"],
    SAFE_FOR_XML: false,
    RETURN_DOM: true
  };

  var lang$1 = {
    attachFiles: "Attach Files",
    bold: "Bold",
    bullets: "Bullets",
    byte: "Byte",
    bytes: "Bytes",
    captionPlaceholder: "Add a caption…",
    code: "Code",
    heading1: "Heading",
    indent: "Increase Level",
    italic: "Italic",
    link: "Link",
    numbers: "Numbers",
    outdent: "Decrease Level",
    quote: "Quote",
    redo: "Redo",
    remove: "Remove",
    strike: "Strikethrough",
    undo: "Undo",
    unlink: "Unlink",
    url: "URL",
    urlPlaceholder: "Enter a URL…",
    GB: "GB",
    KB: "KB",
    MB: "MB",
    PB: "PB",
    TB: "TB"
  };

  /* eslint-disable
      no-case-declarations,
  */
  const sizes = [lang$1.bytes, lang$1.KB, lang$1.MB, lang$1.GB, lang$1.TB, lang$1.PB];
  var file_size_formatting = {
    prefix: "IEC",
    precision: 2,
    formatter(number) {
      switch (number) {
        case 0:
          return "0 ".concat(lang$1.bytes);
        case 1:
          return "1 ".concat(lang$1.byte);
        default:
          let base;
          if (this.prefix === "SI") {
            base = 1000;
          } else if (this.prefix === "IEC") {
            base = 1024;
          }
          const exp = Math.floor(Math.log(number) / Math.log(base));
          const humanSize = number / Math.pow(base, exp);
          const string = humanSize.toFixed(this.precision);
          const withoutInsignificantZeros = string.replace(/0*$/, "").replace(/\.$/, "");
          return "".concat(withoutInsignificantZeros, " ").concat(sizes[exp]);
      }
    }
  };

  const ZERO_WIDTH_SPACE = "\uFEFF";
  const NON_BREAKING_SPACE = "\u00A0";
  const OBJECT_REPLACEMENT_CHARACTER = "\uFFFC";

  const extend = function (properties) {
    for (const key in properties) {
      const value = properties[key];
      this[key] = value;
    }
    return this;
  };

  const html$2 = document.documentElement;
  const match = html$2.matches;
  const handleEvent = function (eventName) {
    let {
      onElement,
      matchingSelector,
      withCallback,
      inPhase,
      preventDefault,
      times
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const element = onElement ? onElement : html$2;
    const selector = matchingSelector;
    const useCapture = inPhase === "capturing";
    const handler = function (event) {
      if (times != null && --times === 0) {
        handler.destroy();
      }
      const target = findClosestElementFromNode(event.target, {
        matchingSelector: selector
      });
      if (target != null) {
        withCallback === null || withCallback === void 0 || withCallback.call(target, event, target);
        if (preventDefault) {
          event.preventDefault();
        }
      }
    };
    handler.destroy = () => element.removeEventListener(eventName, handler, useCapture);
    element.addEventListener(eventName, handler, useCapture);
    return handler;
  };
  const handleEventOnce = function (eventName) {
    let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    options.times = 1;
    return handleEvent(eventName, options);
  };
  const triggerEvent = function (eventName) {
    let {
      onElement,
      bubbles,
      cancelable,
      attributes
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const element = onElement != null ? onElement : html$2;
    bubbles = bubbles !== false;
    cancelable = cancelable !== false;
    const event = document.createEvent("Events");
    event.initEvent(eventName, bubbles, cancelable);
    if (attributes != null) {
      extend.call(event, attributes);
    }
    return element.dispatchEvent(event);
  };
  const elementMatchesSelector = function (element, selector) {
    if ((element === null || element === void 0 ? void 0 : element.nodeType) === 1) {
      return match.call(element, selector);
    }
  };
  const findClosestElementFromNode = function (node) {
    let {
      matchingSelector,
      untilNode
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    while (node && node.nodeType !== Node.ELEMENT_NODE) {
      node = node.parentNode;
    }
    if (node == null) {
      return;
    }
    if (matchingSelector != null) {
      if (node.closest && untilNode == null) {
        return node.closest(matchingSelector);
      } else {
        while (node && node !== untilNode) {
          if (elementMatchesSelector(node, matchingSelector)) {
            return node;
          }
          node = node.parentNode;
        }
      }
    } else {
      return node;
    }
  };
  const findInnerElement = function (element) {
    while ((_element = element) !== null && _element !== void 0 && _element.firstElementChild) {
      var _element;
      element = element.firstElementChild;
    }
    return element;
  };
  const innerElementIsActive = element => document.activeElement !== element && elementContainsNode(element, document.activeElement);
  const elementContainsNode = function (element, node) {
    if (!element || !node) {
      return;
    }
    while (node) {
      if (node === element) {
        return true;
      }
      node = node.parentNode;
    }
  };
  const findNodeFromContainerAndOffset = function (container, offset) {
    if (!container) {
      return;
    }
    if (container.nodeType === Node.TEXT_NODE) {
      return container;
    } else if (offset === 0) {
      return container.firstChild != null ? container.firstChild : container;
    } else {
      return container.childNodes.item(offset - 1);
    }
  };
  const findElementFromContainerAndOffset = function (container, offset) {
    const node = findNodeFromContainerAndOffset(container, offset);
    return findClosestElementFromNode(node);
  };
  const findChildIndexOfNode = function (node) {
    var _node;
    if (!((_node = node) !== null && _node !== void 0 && _node.parentNode)) {
      return;
    }
    let childIndex = 0;
    node = node.previousSibling;
    while (node) {
      childIndex++;
      node = node.previousSibling;
    }
    return childIndex;
  };
  const removeNode = node => {
    var _node$parentNode;
    return node === null || node === void 0 || (_node$parentNode = node.parentNode) === null || _node$parentNode === void 0 ? void 0 : _node$parentNode.removeChild(node);
  };
  const walkTree = function (tree) {
    let {
      onlyNodesOfType,
      usingFilter,
      expandEntityReferences
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const whatToShow = (() => {
      switch (onlyNodesOfType) {
        case "element":
          return NodeFilter.SHOW_ELEMENT;
        case "text":
          return NodeFilter.SHOW_TEXT;
        case "comment":
          return NodeFilter.SHOW_COMMENT;
        default:
          return NodeFilter.SHOW_ALL;
      }
    })();
    return document.createTreeWalker(tree, whatToShow, usingFilter != null ? usingFilter : null, expandEntityReferences === true);
  };
  const tagName = element => {
    var _element$tagName;
    return element === null || element === void 0 || (_element$tagName = element.tagName) === null || _element$tagName === void 0 ? void 0 : _element$tagName.toLowerCase();
  };
  const makeElement = function (tag) {
    let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    let key, value;
    if (typeof tag === "object") {
      options = tag;
      tag = options.tagName;
    } else {
      options = {
        attributes: options
      };
    }
    const element = document.createElement(tag);
    if (options.editable != null) {
      if (options.attributes == null) {
        options.attributes = {};
      }
      options.attributes.contenteditable = options.editable;
    }
    if (options.attributes) {
      for (key in options.attributes) {
        value = options.attributes[key];
        element.setAttribute(key, value);
      }
    }
    if (options.style) {
      for (key in options.style) {
        value = options.style[key];
        element.style[key] = value;
      }
    }
    if (options.data) {
      for (key in options.data) {
        value = options.data[key];
        element.dataset[key] = value;
      }
    }
    if (options.className) {
      options.className.split(" ").forEach(className => {
        element.classList.add(className);
      });
    }
    if (options.textContent) {
      element.textContent = options.textContent;
    }
    if (options.childNodes) {
      [].concat(options.childNodes).forEach(childNode => {
        element.appendChild(childNode);
      });
    }
    return element;
  };
  let blockTagNames = undefined;
  const getBlockTagNames = function () {
    if (blockTagNames != null) {
      return blockTagNames;
    }
    blockTagNames = [];
    for (const key in attributes) {
      const attributes$1 = attributes[key];
      if (attributes$1.tagName) {
        blockTagNames.push(attributes$1.tagName);
      }
    }
    return blockTagNames;
  };
  const nodeIsBlockContainer = node => nodeIsBlockStartComment(node === null || node === void 0 ? void 0 : node.firstChild);
  const nodeProbablyIsBlockContainer = function (node) {
    return getBlockTagNames().includes(tagName(node)) && !getBlockTagNames().includes(tagName(node.firstChild));
  };
  const nodeIsBlockStart = function (node) {
    let {
      strict
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
      strict: true
    };
    if (strict) {
      return nodeIsBlockStartComment(node);
    } else {
      return nodeIsBlockStartComment(node) || !nodeIsBlockStartComment(node.firstChild) && nodeProbablyIsBlockContainer(node);
    }
  };
  const nodeIsBlockStartComment = node => nodeIsCommentNode(node) && (node === null || node === void 0 ? void 0 : node.data) === "block";
  const nodeIsCommentNode = node => (node === null || node === void 0 ? void 0 : node.nodeType) === Node.COMMENT_NODE;
  const nodeIsCursorTarget = function (node) {
    let {
      name
    } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    if (!node) {
      return;
    }
    if (nodeIsTextNode(node)) {
      if (node.data === ZERO_WIDTH_SPACE) {
        if (name) {
          return node.parentNode.dataset.trixCursorTarget === name;
        } else {
          return true;
        }
      }
    } else {
      return nodeIsCursorTarget(node.firstChild);
    }
  };
  const nodeIsAttachmentElement = node => elementMatchesSelector(node, attachmentSelector);
  const nodeIsEmptyTextNode = node => nodeIsTextNode(node) && (node === null || node === void 0 ? void 0 : node.data) === "";
  const nodeIsTextNode = node => (node === null || node === void 0 ? void 0 : node.nodeType) === Node.TEXT_NODE;

  const input = {
    level2Enabled: true,
    getLevel() {
      if (this.level2Enabled && browser$1.supportsInputEvents) {
        return 2;
      } else {
        return 0;
      }
    },
    pickFiles(callback) {
      const input = makeElement("input", {
        type: "file",
        multiple: true,
        hidden: true,
        id: this.fileInputId
      });
      input.addEventListener("change", () => {
        callback(input.files);
        removeNode(input);
      });
      removeNode(document.getElementById(this.fileInputId));
      document.body.appendChild(input);
      input.click();
    }
  };

  var key_names = {
    8: "backspace",
    9: "tab",
    13: "return",
    27: "escape",
    37: "left",
    39: "right",
    46: "delete",
    68: "d",
    72: "h",
    79: "o"
  };

  var parser = {
    removeBlankTableCells: false,
    tableCellSeparator: " | ",
    tableRowSeparator: "\n"
  };

  var text_attributes = {
    bold: {
      tagName: "strong",
      inheritable: true,
      parser(element) {
        const style = window.getComputedStyle(element);
        return style.fontWeight === "bold" || style.fontWeight >= 600;
      }
    },
    italic: {
      tagName: "em",
      inheritable: true,
      parser(element) {
        const style = window.getComputedStyle(element);
        return style.fontStyle === "italic";
      }
    },
    href: {
      groupTagName: "a",
      parser(element) {
        const matchingSelector = "a:not(".concat(attachmentSelector, ")");
        const link = element.closest(matchingSelector);
        if (link) {
          return link.getAttribute("href");
        }
      }
    },
    strike: {
      tagName: "del",
      inheritable: true
    },
    frozen: {
      style: {
        backgroundColor: "highlight"
      }
    }
  };

  var toolbar = {
    getDefaultHTML() {
      return "<div class=\"trix-button-row\">\n      <span class=\"trix-button-group trix-button-group--text-tools\" data-trix-button-group=\"text-tools\">\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-bold\" data-trix-attribute=\"bold\" data-trix-key=\"b\" title=\"".concat(lang$1.bold, "\" tabindex=\"-1\">").concat(lang$1.bold, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-italic\" data-trix-attribute=\"italic\" data-trix-key=\"i\" title=\"").concat(lang$1.italic, "\" tabindex=\"-1\">").concat(lang$1.italic, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-strike\" data-trix-attribute=\"strike\" title=\"").concat(lang$1.strike, "\" tabindex=\"-1\">").concat(lang$1.strike, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-link\" data-trix-attribute=\"href\" data-trix-action=\"link\" data-trix-key=\"k\" title=\"").concat(lang$1.link, "\" tabindex=\"-1\">").concat(lang$1.link, "</button>\n      </span>\n\n      <span class=\"trix-button-group trix-button-group--block-tools\" data-trix-button-group=\"block-tools\">\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-heading-1\" data-trix-attribute=\"heading1\" title=\"").concat(lang$1.heading1, "\" tabindex=\"-1\">").concat(lang$1.heading1, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-quote\" data-trix-attribute=\"quote\" title=\"").concat(lang$1.quote, "\" tabindex=\"-1\">").concat(lang$1.quote, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-code\" data-trix-attribute=\"code\" title=\"").concat(lang$1.code, "\" tabindex=\"-1\">").concat(lang$1.code, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-bullet-list\" data-trix-attribute=\"bullet\" title=\"").concat(lang$1.bullets, "\" tabindex=\"-1\">").concat(lang$1.bullets, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-number-list\" data-trix-attribute=\"number\" title=\"").concat(lang$1.numbers, "\" tabindex=\"-1\">").concat(lang$1.numbers, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-decrease-nesting-level\" data-trix-action=\"decreaseNestingLevel\" title=\"").concat(lang$1.outdent, "\" tabindex=\"-1\">").concat(lang$1.outdent, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-increase-nesting-level\" data-trix-action=\"increaseNestingLevel\" title=\"").concat(lang$1.indent, "\" tabindex=\"-1\">").concat(lang$1.indent, "</button>\n      </span>\n\n      <span class=\"trix-button-group trix-button-group--file-tools\" data-trix-button-group=\"file-tools\">\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-attach\" data-trix-action=\"attachFiles\" title=\"").concat(lang$1.attachFiles, "\" tabindex=\"-1\">").concat(lang$1.attachFiles, "</button>\n      </span>\n\n      <span class=\"trix-button-group-spacer\"></span>\n\n      <span class=\"trix-button-group trix-button-group--history-tools\" data-trix-button-group=\"history-tools\">\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-undo\" data-trix-action=\"undo\" data-trix-key=\"z\" title=\"").concat(lang$1.undo, "\" tabindex=\"-1\">").concat(lang$1.undo, "</button>\n        <button type=\"button\" class=\"trix-button trix-button--icon trix-button--icon-redo\" data-trix-action=\"redo\" data-trix-key=\"shift+z\" title=\"").concat(lang$1.redo, "\" tabindex=\"-1\">").concat(lang$1.redo, "</button>\n      </span>\n    </div>\n\n    <div class=\"trix-dialogs\" data-trix-dialogs>\n      <div class=\"trix-dialog trix-dialog--link\" data-trix-dialog=\"href\" data-trix-dialog-attribute=\"href\">\n        <div class=\"trix-dialog__link-fields\">\n          <input type=\"url\" name=\"href\" class=\"trix-input trix-input--dialog\" placeholder=\"").concat(lang$1.urlPlaceholder, "\" aria-label=\"").concat(lang$1.url, "\" data-trix-validate-href required data-trix-input>\n          <div class=\"trix-button-group\">\n            <input type=\"button\" class=\"trix-button trix-button--dialog\" value=\"").concat(lang$1.link, "\" data-trix-method=\"setAttribute\">\n            <input type=\"button\" class=\"trix-button trix-button--dialog\" value=\"").concat(lang$1.unlink, "\" data-trix-method=\"removeAttribute\">\n          </div>\n        </div>\n      </div>\n    </div>");
    }
  };

  const undo = {
    interval: 5000
  };

  var config = /*#__PURE__*/Object.freeze({
    __proto__: null,
    attachments: attachments,
    blockAttributes: attributes,
    browser: browser$1,
    css: css$3,
    dompurify: dompurify,
    fileSize: file_size_formatting,
    input: input,
    keyNames: key_names,
    lang: lang$1,
    parser: parser,
    textAttributes: text_attributes,
    toolbar: toolbar,
    undo: undo
  });

  class BasicObject {
    static proxyMethod(expression) {
      const {
        name,
        toMethod,
        toProperty,
        optional
      } = parseProxyMethodExpression(expression);
      this.prototype[name] = function () {
        let subject;
        let object;
        if (toMethod) {
          if (optional) {
            var _this$toMethod;
            object = (_this$toMethod = this[toMethod]) === null || _this$toMethod === void 0 ? void 0 : _this$toMethod.call(this);
          } else {
            object = this[toMethod]();
          }
        } else if (toProperty) {
          object = this[toProperty];
        }
        if (optional) {
          var _object;
          subject = (_object = object) === null || _object === void 0 ? void 0 : _object[name];
          if (subject) {
            return apply$1.call(subject, object, arguments);
          }
        } else {
          subject = object[name];
          return apply$1.call(subject, object, arguments);
        }
      };
    }
  }
  const parseProxyMethodExpression = function (expression) {
    const match = expression.match(proxyMethodExpressionPattern);
    if (!match) {
      throw new Error("can't parse @proxyMethod expression: ".concat(expression));
    }
    const args = {
      name: match[4]
    };
    if (match[2] != null) {
      args.toMethod = match[1];
    } else {
      args.toProperty = match[1];
    }
    if (match[3] != null) {
      args.optional = true;
    }
    return args;
  };
  const {
    apply: apply$1
  } = Function.prototype;
  const proxyMethodExpressionPattern = new RegExp("\
^\
(.+?)\
(\\(\\))?\
(\\?)?\
\\.\
(.+?)\
$\
");

  var _Array$from, _$codePointAt$1, _$1, _String$fromCodePoint;
  class UTF16String extends BasicObject {
    static box() {
      let value = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "";
      if (value instanceof this) {
        return value;
      } else {
        return this.fromUCS2String(value === null || value === void 0 ? void 0 : value.toString());
      }
    }
    static fromUCS2String(ucs2String) {
      return new this(ucs2String, ucs2decode(ucs2String));
    }
    static fromCodepoints(codepoints) {
      return new this(ucs2encode(codepoints), codepoints);
    }
    constructor(ucs2String, codepoints) {
      super(...arguments);
      this.ucs2String = ucs2String;
      this.codepoints = codepoints;
      this.length = this.codepoints.length;
      this.ucs2Length = this.ucs2String.length;
    }
    offsetToUCS2Offset(offset) {
      return ucs2encode(this.codepoints.slice(0, Math.max(0, offset))).length;
    }
    offsetFromUCS2Offset(ucs2Offset) {
      return ucs2decode(this.ucs2String.slice(0, Math.max(0, ucs2Offset))).length;
    }
    slice() {
      return this.constructor.fromCodepoints(this.codepoints.slice(...arguments));
    }
    charAt(offset) {
      return this.slice(offset, offset + 1);
    }
    isEqualTo(value) {
      return this.constructor.box(value).ucs2String === this.ucs2String;
    }
    toJSON() {
      return this.ucs2String;
    }
    getCacheKey() {
      return this.ucs2String;
    }
    toString() {
      return this.ucs2String;
    }
  }
  const hasArrayFrom = ((_Array$from = Array.from) === null || _Array$from === void 0 ? void 0 : _Array$from.call(Array, "\ud83d\udc7c").length) === 1;
  const hasStringCodePointAt$1 = ((_$codePointAt$1 = (_$1 = " ").codePointAt) === null || _$codePointAt$1 === void 0 ? void 0 : _$codePointAt$1.call(_$1, 0)) != null;
  const hasStringFromCodePoint = ((_String$fromCodePoint = String.fromCodePoint) === null || _String$fromCodePoint === void 0 ? void 0 : _String$fromCodePoint.call(String, 32, 128124)) === " \ud83d\udc7c";

  // UCS-2 conversion helpers ported from Mathias Bynens' Punycode.js:
  // https://github.com/bestiejs/punycode.js#punycodeucs2

  let ucs2decode, ucs2encode;

  // Creates an array containing the numeric code points of each Unicode
  // character in the string. While JavaScript uses UCS-2 internally,
  // this function will convert a pair of surrogate halves (each of which
  // UCS-2 exposes as separate characters) into a single code point,
  // matching UTF-16.
  if (hasArrayFrom && hasStringCodePointAt$1) {
    ucs2decode = string => Array.from(string).map(char => char.codePointAt(0));
  } else {
    ucs2decode = function (string) {
      const output = [];
      let counter = 0;
      const {
        length
      } = string;
      while (counter < length) {
        let value = string.charCodeAt(counter++);
        if (0xd800 <= value && value <= 0xdbff && counter < length) {
          // high surrogate, and there is a next character
          const extra = string.charCodeAt(counter++);
          if ((extra & 0xfc00) === 0xdc00) {
            // low surrogate
            value = ((value & 0x3ff) << 10) + (extra & 0x3ff) + 0x10000;
          } else {
            // unmatched surrogate; only append this code unit, in case the
            // next code unit is the high surrogate of a surrogate pair
            counter--;
          }
        }
        output.push(value);
      }
      return output;
    };
  }

  // Creates a string based on an array of numeric code points.
  if (hasStringFromCodePoint) {
    ucs2encode = array => String.fromCodePoint(...Array.from(array || []));
  } else {
    ucs2encode = function (array) {
      const characters = (() => {
        const result = [];
        Array.from(array).forEach(value => {
          let output = "";
          if (value > 0xffff) {
            value -= 0x10000;
            output += String.fromCharCode(value >>> 10 & 0x3ff | 0xd800);
            value = 0xdc00 | value & 0x3ff;
          }
          result.push(output + String.fromCharCode(value));
        });
        return result;
      })();
      return characters.join("");
    };
  }

  let id$2 = 0;
  class TrixObject extends BasicObject {
    static fromJSONString(jsonString) {
      return this.fromJSON(JSON.parse(jsonString));
    }
    constructor() {
      super(...arguments);
      this.id = ++id$2;
    }
    hasSameConstructorAs(object) {
      return this.constructor === (object === null || object === void 0 ? void 0 : object.constructor);
    }
    isEqualTo(object) {
      return this === object;
    }
    inspect() {
      const parts = [];
      const contents = this.contentsForInspection() || {};
      for (const key in contents) {
        const value = contents[key];
        parts.push("".concat(key, "=").concat(value));
      }
      return "#<".concat(this.constructor.name, ":").concat(this.id).concat(parts.length ? " ".concat(parts.join(", ")) : "", ">");
    }
    contentsForInspection() {}
    toJSONString() {
      return JSON.stringify(this);
    }
    toUTF16String() {
      return UTF16String.box(this);
    }
    getCacheKey() {
      return this.id.toString();
    }
  }

  /* eslint-disable
      id-length,
  */
  const arraysAreEqual = function () {
    let a = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    let b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    if (a.length !== b.length) {
      return false;
    }
    for (let index = 0; index < a.length; index++) {
      const value = a[index];
      if (value !== b[index]) {
        return false;
      }
    }
    return true;
  };
  const arrayStartsWith = function () {
    let a = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    let b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    return arraysAreEqual(a.slice(0, b.length), b);
  };
  const spliceArray = function (array) {
    const result = array.slice(0);
    for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
      args[_key - 1] = arguments[_key];
    }
    result.splice(...args);
    return result;
  };
  const summarizeArrayChange = function () {
    let oldArray = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    let newArray = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    const added = [];
    const removed = [];
    const existingValues = new Set();
    oldArray.forEach(value => {
      existingValues.add(value);
    });
    const currentValues = new Set();
    newArray.forEach(value => {
      currentValues.add(value);
      if (!existingValues.has(value)) {
        added.push(value);
      }
    });
    oldArray.forEach(value => {
      if (!currentValues.has(value)) {
        removed.push(value);
      }
    });
    return {
      added,
      removed
    };
  };

  // https://github.com/mathiasbynens/unicode-2.1.8/blob/master/Bidi_Class/Right_To_Left/regex.js
  const RTL_PATTERN = /[\u05BE\u05C0\u05C3\u05D0-\u05EA\u05F0-\u05F4\u061B\u061F\u0621-\u063A\u0640-\u064A\u066D\u0671-\u06B7\u06BA-\u06BE\u06C0-\u06CE\u06D0-\u06D5\u06E5\u06E6\u200F\u202B\u202E\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE72\uFE74\uFE76-\uFEFC]/;
  const getDirection = function () {
    const input = makeElement("input", {
      dir: "auto",
      name: "x",
      dirName: "x.dir"
    });
    const textArea = makeElement("textarea", {
      dir: "auto",
      name: "y",
      dirName: "y.dir"
    });
    const form = makeElement("form");
    form.appendChild(input);
    form.appendChild(textArea);
    const supportsDirName = function () {
      try {
        return new FormData(form).has(textArea.dirName);
      } catch (error) {
        return false;
      }
    }();
    const supportsDirSelector = function () {
      try {
        return input.matches(":dir(ltr),:dir(rtl)");
      } catch (error) {
        return false;
      }
    }();
    if (supportsDirName) {
      return function (string) {
        textArea.value = string;
        return new FormData(form).get(textArea.dirName);
      };
    } else if (supportsDirSelector) {
      return function (string) {
        input.value = string;
        if (input.matches(":dir(rtl)")) {
          return "rtl";
        } else {
          return "ltr";
        }
      };
    } else {
      return function (string) {
        const char = string.trim().charAt(0);
        if (RTL_PATTERN.test(char)) {
          return "rtl";
        } else {
          return "ltr";
        }
      };
    }
  }();

  let allAttributeNames = null;
  let blockAttributeNames = null;
  let textAttributeNames = null;
  let listAttributeNames = null;
  const getAllAttributeNames = () => {
    if (!allAttributeNames) {
      allAttributeNames = getTextAttributeNames().concat(getBlockAttributeNames());
    }
    return allAttributeNames;
  };
  const getBlockConfig = attributeName => attributes[attributeName];
  const getBlockAttributeNames = () => {
    if (!blockAttributeNames) {
      blockAttributeNames = Object.keys(attributes);
    }
    return blockAttributeNames;
  };
  const getTextConfig = attributeName => text_attributes[attributeName];
  const getTextAttributeNames = () => {
    if (!textAttributeNames) {
      textAttributeNames = Object.keys(text_attributes);
    }
    return textAttributeNames;
  };
  const getListAttributeNames = () => {
    if (!listAttributeNames) {
      listAttributeNames = [];
      for (const key in attributes) {
        const {
          listAttribute
        } = attributes[key];
        if (listAttribute != null) {
          listAttributeNames.push(listAttribute);
        }
      }
    }
    return listAttributeNames;
  };

  /* eslint-disable
  */
  const installDefaultCSSForTagName = function (tagName, defaultCSS) {
    const styleElement = insertStyleElementForTagName(tagName);
    styleElement.textContent = defaultCSS.replace(/%t/g, tagName);
  };
  const insertStyleElementForTagName = function (tagName) {
    const element = document.createElement("style");
    element.setAttribute("type", "text/css");
    element.setAttribute("data-tag-name", tagName.toLowerCase());
    const nonce = getCSPNonce();
    if (nonce) {
      element.setAttribute("nonce", nonce);
    }
    document.head.insertBefore(element, document.head.firstChild);
    return element;
  };
  const getCSPNonce = function () {
    const element = getMetaElement("trix-csp-nonce") || getMetaElement("csp-nonce");
    if (element) {
      const {
        nonce,
        content
      } = element;
      return nonce == "" ? content : nonce;
    }
  };
  const getMetaElement = name => document.head.querySelector("meta[name=".concat(name, "]"));

  const testTransferData = {
    "application/x-trix-feature-detection": "test"
  };
  const dataTransferIsPlainText = function (dataTransfer) {
    const text = dataTransfer.getData("text/plain");
    const html = dataTransfer.getData("text/html");
    if (text && html) {
      const {
        body
      } = new DOMParser().parseFromString(html, "text/html");
      if (body.textContent === text) {
        return !body.querySelector("*");
      }
    } else {
      return text === null || text === void 0 ? void 0 : text.length;
    }
  };
  const dataTransferIsMsOfficePaste = _ref => {
    let {
      dataTransfer
    } = _ref;
    return dataTransfer.types.includes("Files") && dataTransfer.types.includes("text/html") && dataTransfer.getData("text/html").includes("urn:schemas-microsoft-com:office:office");
  };
  const dataTransferIsWritable = function (dataTransfer) {
    if (!(dataTransfer !== null && dataTransfer !== void 0 && dataTransfer.setData)) return false;
    for (const key in testTransferData) {
      const value = testTransferData[key];
      try {
        dataTransfer.setData(key, value);
        if (!dataTransfer.getData(key) === value) return false;
      } catch (error) {
        return false;
      }
    }
    return true;
  };
  const keyEventIsKeyboardCommand = function () {
    if (/Mac|^iP/.test(navigator.platform)) {
      return event => event.metaKey;
    } else {
      return event => event.ctrlKey;
    }
  }();
  function shouldRenderInmmediatelyToDealWithIOSDictation(inputEvent) {
    if (/iPhone|iPad/.test(navigator.userAgent)) {
      // Handle garbled content and duplicated newlines when using dictation on iOS 18+. Upon dictation completion, iOS sends
      // the list of insertText / insertParagraph events in a quick sequence. If we don't render
      // the editor synchronously, the internal range fails to update and results in garbled content or duplicated newlines.
      //
      // This workaround is necessary because iOS doesn't send composing events as expected while dictating:
      // https://bugs.webkit.org/show_bug.cgi?id=261764
      return !inputEvent.inputType || inputEvent.inputType === "insertParagraph";
    } else {
      return false;
    }
  }

  const defer = fn => setTimeout(fn, 1);

  /* eslint-disable
      id-length,
  */
  const copyObject = function () {
    let object = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    const result = {};
    for (const key in object) {
      const value = object[key];
      result[key] = value;
    }
    return result;
  };
  const objectsAreEqual = function () {
    let a = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    let b = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    if (Object.keys(a).length !== Object.keys(b).length) {
      return false;
    }
    for (const key in a) {
      const value = a[key];
      if (value !== b[key]) {
        return false;
      }
    }
    return true;
  };

  const normalizeRange = function (range) {
    if (range == null) return;
    if (!Array.isArray(range)) {
      range = [range, range];
    }
    return [copyValue(range[0]), copyValue(range[1] != null ? range[1] : range[0])];
  };
  const rangeIsCollapsed = function (range) {
    if (range == null) return;
    const [start, end] = normalizeRange(range);
    return rangeValuesAreEqual(start, end);
  };
  const rangesAreEqual = function (leftRange, rightRange) {
    if (leftRange == null || rightRange == null) return;
    const [leftStart, leftEnd] = normalizeRange(leftRange);
    const [rightStart, rightEnd] = normalizeRange(rightRange);
    return rangeValuesAreEqual(leftStart, rightStart) && rangeValuesAreEqual(leftEnd, rightEnd);
  };
  const copyValue = function (value) {
    if (typeof value === "number") {
      return value;
    } else {
      return copyObject(value);
    }
  };
  const rangeValuesAreEqual = function (left, right) {
    if (typeof left === "number") {
      return left === right;
    } else {
      return objectsAreEqual(left, right);
    }
  };

  class SelectionChangeObserver extends BasicObject {
    constructor() {
      super(...arguments);
      this.update = this.update.bind(this);
      this.selectionManagers = [];
    }
    start() {
      if (!this.started) {
        this.started = true;
        document.addEventListener("selectionchange", this.update, true);
      }
    }
    stop() {
      if (this.started) {
        this.started = false;
        return document.removeEventListener("selectionchange", this.update, true);
      }
    }
    registerSelectionManager(selectionManager) {
      if (!this.selectionManagers.includes(selectionManager)) {
        this.selectionManagers.push(selectionManager);
        return this.start();
      }
    }
    unregisterSelectionManager(selectionManager) {
      this.selectionManagers = this.selectionManagers.filter(sm => sm !== selectionManager);
      if (this.selectionManagers.length === 0) {
        return this.stop();
      }
    }
    notifySelectionManagersOfSelectionChange() {
      return this.selectionManagers.map(selectionManager => selectionManager.selectionDidChange());
    }
    update() {
      this.notifySelectionManagersOfSelectionChange();
    }
    reset() {
      this.update();
    }
  }
  const selectionChangeObserver = new SelectionChangeObserver();
  const getDOMSelection = function () {
    const selection = window.getSelection();
    if (selection.rangeCount > 0) {
      return selection;
    }
  };
  const getDOMRange = function () {
    var _getDOMSelection;
    const domRange = (_getDOMSelection = getDOMSelection()) === null || _getDOMSelection === void 0 ? void 0 : _getDOMSelection.getRangeAt(0);
    if (domRange) {
      if (!domRangeIsPrivate(domRange)) {
        return domRange;
      }
    }
  };
  const setDOMRange = function (domRange) {
    const selection = window.getSelection();
    selection.removeAllRanges();
    selection.addRange(domRange);
    return selectionChangeObserver.update();
  };

  // In Firefox, clicking certain <input> elements changes the selection to a
  // private element used to draw its UI. Attempting to access properties of those
  // elements throws an error.
  // https://bugzilla.mozilla.org/show_bug.cgi?id=208427
  const domRangeIsPrivate = domRange => nodeIsPrivate(domRange.startContainer) || nodeIsPrivate(domRange.endContainer);
  const nodeIsPrivate = node => !Object.getPrototypeOf(node);

  /* eslint-disable
      id-length,
      no-useless-escape,
  */
  const normalizeSpaces = string => string.replace(new RegExp("".concat(ZERO_WIDTH_SPACE), "g"), "").replace(new RegExp("".concat(NON_BREAKING_SPACE), "g"), " ");
  const normalizeNewlines = string => string.replace(/\r\n?/g, "\n");
  const breakableWhitespacePattern = new RegExp("[^\\S".concat(NON_BREAKING_SPACE, "]"));
  const squishBreakableWhitespace = string => string
  // Replace all breakable whitespace characters with a space
  .replace(new RegExp("".concat(breakableWhitespacePattern.source), "g"), " ")
  // Replace two or more spaces with a single space
  .replace(/\ {2,}/g, " ");
  const summarizeStringChange = function (oldString, newString) {
    let added, removed;
    oldString = UTF16String.box(oldString);
    newString = UTF16String.box(newString);
    if (newString.length < oldString.length) {
      [removed, added] = utf16StringDifferences(oldString, newString);
    } else {
      [added, removed] = utf16StringDifferences(newString, oldString);
    }
    return {
      added,
      removed
    };
  };
  const utf16StringDifferences = function (a, b) {
    if (a.isEqualTo(b)) {
      return ["", ""];
    }
    const diffA = utf16StringDifference(a, b);
    const {
      length
    } = diffA.utf16String;
    let diffB;
    if (length) {
      const {
        offset
      } = diffA;
      const codepoints = a.codepoints.slice(0, offset).concat(a.codepoints.slice(offset + length));
      diffB = utf16StringDifference(b, UTF16String.fromCodepoints(codepoints));
    } else {
      diffB = utf16StringDifference(b, a);
    }
    return [diffA.utf16String.toString(), diffB.utf16String.toString()];
  };
  const utf16StringDifference = function (a, b) {
    let leftIndex = 0;
    let rightIndexA = a.length;
    let rightIndexB = b.length;
    while (leftIndex < rightIndexA && a.charAt(leftIndex).isEqualTo(b.charAt(leftIndex))) {
      leftIndex++;
    }
    while (rightIndexA > leftIndex + 1 && a.charAt(rightIndexA - 1).isEqualTo(b.charAt(rightIndexB - 1))) {
      rightIndexA--;
      rightIndexB--;
    }
    return {
      utf16String: a.slice(leftIndex, rightIndexA),
      offset: leftIndex
    };
  };

  class Hash extends TrixObject {
    static fromCommonAttributesOfObjects() {
      let objects = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      if (!objects.length) {
        return new this();
      }
      let hash = box(objects[0]);
      let keys = hash.getKeys();
      objects.slice(1).forEach(object => {
        keys = hash.getKeysCommonToHash(box(object));
        hash = hash.slice(keys);
      });
      return hash;
    }
    static box(values) {
      return box(values);
    }
    constructor() {
      let values = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      super(...arguments);
      this.values = copy(values);
    }
    add(key, value) {
      return this.merge(object(key, value));
    }
    remove(key) {
      return new Hash(copy(this.values, key));
    }
    get(key) {
      return this.values[key];
    }
    has(key) {
      return key in this.values;
    }
    merge(values) {
      return new Hash(merge(this.values, unbox(values)));
    }
    slice(keys) {
      const values = {};
      Array.from(keys).forEach(key => {
        if (this.has(key)) {
          values[key] = this.values[key];
        }
      });
      return new Hash(values);
    }
    getKeys() {
      return Object.keys(this.values);
    }
    getKeysCommonToHash(hash) {
      hash = box(hash);
      return this.getKeys().filter(key => this.values[key] === hash.values[key]);
    }
    isEqualTo(values) {
      return arraysAreEqual(this.toArray(), box(values).toArray());
    }
    isEmpty() {
      return this.getKeys().length === 0;
    }
    toArray() {
      if (!this.array) {
        const result = [];
        for (const key in this.values) {
          const value = this.values[key];
          result.push(result.push(key, value));
        }
        this.array = result.slice(0);
      }
      return this.array;
    }
    toObject() {
      return copy(this.values);
    }
    toJSON() {
      return this.toObject();
    }
    contentsForInspection() {
      return {
        values: JSON.stringify(this.values)
      };
    }
  }
  const object = function (key, value) {
    const result = {};
    result[key] = value;
    return result;
  };
  const merge = function (object, values) {
    const result = copy(object);
    for (const key in values) {
      const value = values[key];
      result[key] = value;
    }
    return result;
  };
  const copy = function (object, keyToRemove) {
    const result = {};
    const sortedKeys = Object.keys(object).sort();
    sortedKeys.forEach(key => {
      if (key !== keyToRemove) {
        result[key] = object[key];
      }
    });
    return result;
  };
  const box = function (object) {
    if (object instanceof Hash) {
      return object;
    } else {
      return new Hash(object);
    }
  };
  const unbox = function (object) {
    if (object instanceof Hash) {
      return object.values;
    } else {
      return object;
    }
  };

  class ObjectGroup {
    static groupObjects() {
      let ungroupedObjects = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      let {
        depth,
        asTree
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let group;
      if (asTree) {
        if (depth == null) {
          depth = 0;
        }
      }
      const objects = [];
      Array.from(ungroupedObjects).forEach(object => {
        var _object$canBeGrouped2;
        if (group) {
          var _object$canBeGrouped, _group$canBeGroupedWi, _group;
          if ((_object$canBeGrouped = object.canBeGrouped) !== null && _object$canBeGrouped !== void 0 && _object$canBeGrouped.call(object, depth) && (_group$canBeGroupedWi = (_group = group[group.length - 1]).canBeGroupedWith) !== null && _group$canBeGroupedWi !== void 0 && _group$canBeGroupedWi.call(_group, object, depth)) {
            group.push(object);
            return;
          } else {
            objects.push(new this(group, {
              depth,
              asTree
            }));
            group = null;
          }
        }
        if ((_object$canBeGrouped2 = object.canBeGrouped) !== null && _object$canBeGrouped2 !== void 0 && _object$canBeGrouped2.call(object, depth)) {
          group = [object];
        } else {
          objects.push(object);
        }
      });
      if (group) {
        objects.push(new this(group, {
          depth,
          asTree
        }));
      }
      return objects;
    }
    constructor() {
      let objects = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      let {
        depth,
        asTree
      } = arguments.length > 1 ? arguments[1] : undefined;
      this.objects = objects;
      if (asTree) {
        this.depth = depth;
        this.objects = this.constructor.groupObjects(this.objects, {
          asTree,
          depth: this.depth + 1
        });
      }
    }
    getObjects() {
      return this.objects;
    }
    getDepth() {
      return this.depth;
    }
    getCacheKey() {
      const keys = ["objectGroup"];
      Array.from(this.getObjects()).forEach(object => {
        keys.push(object.getCacheKey());
      });
      return keys.join("/");
    }
  }

  class ObjectMap extends BasicObject {
    constructor() {
      let objects = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      super(...arguments);
      this.objects = {};
      Array.from(objects).forEach(object => {
        const hash = JSON.stringify(object);
        if (this.objects[hash] == null) {
          this.objects[hash] = object;
        }
      });
    }
    find(object) {
      const hash = JSON.stringify(object);
      return this.objects[hash];
    }
  }

  class ElementStore {
    constructor(elements) {
      this.reset(elements);
    }
    add(element) {
      const key = getKey(element);
      this.elements[key] = element;
    }
    remove(element) {
      const key = getKey(element);
      const value = this.elements[key];
      if (value) {
        delete this.elements[key];
        return value;
      }
    }
    reset() {
      let elements = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      this.elements = {};
      Array.from(elements).forEach(element => {
        this.add(element);
      });
      return elements;
    }
  }
  const getKey = element => element.dataset.trixStoreKey;

  class Operation extends BasicObject {
    isPerforming() {
      return this.performing === true;
    }
    hasPerformed() {
      return this.performed === true;
    }
    hasSucceeded() {
      return this.performed && this.succeeded;
    }
    hasFailed() {
      return this.performed && !this.succeeded;
    }
    getPromise() {
      if (!this.promise) {
        this.promise = new Promise((resolve, reject) => {
          this.performing = true;
          return this.perform((succeeded, result) => {
            this.succeeded = succeeded;
            this.performing = false;
            this.performed = true;
            if (this.succeeded) {
              resolve(result);
            } else {
              reject(result);
            }
          });
        });
      }
      return this.promise;
    }
    perform(callback) {
      return callback(false);
    }
    release() {
      var _this$promise, _this$promise$cancel;
      (_this$promise = this.promise) === null || _this$promise === void 0 || (_this$promise$cancel = _this$promise.cancel) === null || _this$promise$cancel === void 0 || _this$promise$cancel.call(_this$promise);
      this.promise = null;
      this.performing = null;
      this.performed = null;
      this.succeeded = null;
    }
  }
  Operation.proxyMethod("getPromise().then");
  Operation.proxyMethod("getPromise().catch");

  class ObjectView extends BasicObject {
    constructor(object) {
      let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      super(...arguments);
      this.object = object;
      this.options = options;
      this.childViews = [];
      this.rootView = this;
    }
    getNodes() {
      if (!this.nodes) {
        this.nodes = this.createNodes();
      }
      return this.nodes.map(node => node.cloneNode(true));
    }
    invalidate() {
      var _this$parentView;
      this.nodes = null;
      this.childViews = [];
      return (_this$parentView = this.parentView) === null || _this$parentView === void 0 ? void 0 : _this$parentView.invalidate();
    }
    invalidateViewForObject(object) {
      var _this$findViewForObje;
      return (_this$findViewForObje = this.findViewForObject(object)) === null || _this$findViewForObje === void 0 ? void 0 : _this$findViewForObje.invalidate();
    }
    findOrCreateCachedChildView(viewClass, object, options) {
      let view = this.getCachedViewForObject(object);
      if (view) {
        this.recordChildView(view);
      } else {
        view = this.createChildView(...arguments);
        this.cacheViewForObject(view, object);
      }
      return view;
    }
    createChildView(viewClass, object) {
      let options = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
      if (object instanceof ObjectGroup) {
        options.viewClass = viewClass;
        viewClass = ObjectGroupView;
      }
      const view = new viewClass(object, options);
      return this.recordChildView(view);
    }
    recordChildView(view) {
      view.parentView = this;
      view.rootView = this.rootView;
      this.childViews.push(view);
      return view;
    }
    getAllChildViews() {
      let views = [];
      this.childViews.forEach(childView => {
        views.push(childView);
        views = views.concat(childView.getAllChildViews());
      });
      return views;
    }
    findElement() {
      return this.findElementForObject(this.object);
    }
    findElementForObject(object) {
      const id = object === null || object === void 0 ? void 0 : object.id;
      if (id) {
        return this.rootView.element.querySelector("[data-trix-id='".concat(id, "']"));
      }
    }
    findViewForObject(object) {
      for (const view of this.getAllChildViews()) {
        if (view.object === object) {
          return view;
        }
      }
    }
    getViewCache() {
      if (this.rootView === this) {
        if (this.isViewCachingEnabled()) {
          if (!this.viewCache) {
            this.viewCache = {};
          }
          return this.viewCache;
        }
      } else {
        return this.rootView.getViewCache();
      }
    }
    isViewCachingEnabled() {
      return this.shouldCacheViews !== false;
    }
    enableViewCaching() {
      this.shouldCacheViews = true;
    }
    disableViewCaching() {
      this.shouldCacheViews = false;
    }
    getCachedViewForObject(object) {
      var _this$getViewCache;
      return (_this$getViewCache = this.getViewCache()) === null || _this$getViewCache === void 0 ? void 0 : _this$getViewCache[object.getCacheKey()];
    }
    cacheViewForObject(view, object) {
      const cache = this.getViewCache();
      if (cache) {
        cache[object.getCacheKey()] = view;
      }
    }
    garbageCollectCachedViews() {
      const cache = this.getViewCache();
      if (cache) {
        const views = this.getAllChildViews().concat(this);
        const objectKeys = views.map(view => view.object.getCacheKey());
        for (const key in cache) {
          if (!objectKeys.includes(key)) {
            delete cache[key];
          }
        }
      }
    }
  }
  class ObjectGroupView extends ObjectView {
    constructor() {
      super(...arguments);
      this.objectGroup = this.object;
      this.viewClass = this.options.viewClass;
      delete this.options.viewClass;
    }
    getChildViews() {
      if (!this.childViews.length) {
        Array.from(this.objectGroup.getObjects()).forEach(object => {
          this.findOrCreateCachedChildView(this.viewClass, object, this.options);
        });
      }
      return this.childViews;
    }
    createNodes() {
      const element = this.createContainerElement();
      this.getChildViews().forEach(view => {
        Array.from(view.getNodes()).forEach(node => {
          element.appendChild(node);
        });
      });
      return [element];
    }
    createContainerElement() {
      let depth = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.objectGroup.getDepth();
      return this.getChildViews()[0].createContainerElement(depth);
    }
  }

  /*! @license DOMPurify 3.2.3 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.2.3/LICENSE */

  const {
    entries,
    setPrototypeOf,
    isFrozen,
    getPrototypeOf,
    getOwnPropertyDescriptor
  } = Object;
  let {
    freeze,
    seal,
    create
  } = Object; // eslint-disable-line import/no-mutable-exports
  let {
    apply,
    construct
  } = typeof Reflect !== 'undefined' && Reflect;
  if (!freeze) {
    freeze = function freeze(x) {
      return x;
    };
  }
  if (!seal) {
    seal = function seal(x) {
      return x;
    };
  }
  if (!apply) {
    apply = function apply(fun, thisValue, args) {
      return fun.apply(thisValue, args);
    };
  }
  if (!construct) {
    construct = function construct(Func, args) {
      return new Func(...args);
    };
  }
  const arrayForEach = unapply(Array.prototype.forEach);
  const arrayPop = unapply(Array.prototype.pop);
  const arrayPush = unapply(Array.prototype.push);
  const stringToLowerCase = unapply(String.prototype.toLowerCase);
  const stringToString = unapply(String.prototype.toString);
  const stringMatch = unapply(String.prototype.match);
  const stringReplace = unapply(String.prototype.replace);
  const stringIndexOf = unapply(String.prototype.indexOf);
  const stringTrim = unapply(String.prototype.trim);
  const objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);
  const regExpTest = unapply(RegExp.prototype.test);
  const typeErrorCreate = unconstruct(TypeError);
  /**
   * Creates a new function that calls the given function with a specified thisArg and arguments.
   *
   * @param func - The function to be wrapped and called.
   * @returns A new function that calls the given function with a specified thisArg and arguments.
   */
  function unapply(func) {
    return function (thisArg) {
      for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
        args[_key - 1] = arguments[_key];
      }
      return apply(func, thisArg, args);
    };
  }
  /**
   * Creates a new function that constructs an instance of the given constructor function with the provided arguments.
   *
   * @param func - The constructor function to be wrapped and called.
   * @returns A new function that constructs an instance of the given constructor function with the provided arguments.
   */
  function unconstruct(func) {
    return function () {
      for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
        args[_key2] = arguments[_key2];
      }
      return construct(func, args);
    };
  }
  /**
   * Add properties to a lookup table
   *
   * @param set - The set to which elements will be added.
   * @param array - The array containing elements to be added to the set.
   * @param transformCaseFunc - An optional function to transform the case of each element before adding to the set.
   * @returns The modified set with added elements.
   */
  function addToSet(set, array) {
    let transformCaseFunc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : stringToLowerCase;
    if (setPrototypeOf) {
      // Make 'in' and truthy checks like Boolean(set.constructor)
      // independent of any properties defined on Object.prototype.
      // Prevent prototype setters from intercepting set as a this value.
      setPrototypeOf(set, null);
    }
    let l = array.length;
    while (l--) {
      let element = array[l];
      if (typeof element === 'string') {
        const lcElement = transformCaseFunc(element);
        if (lcElement !== element) {
          // Config presets (e.g. tags.js, attrs.js) are immutable.
          if (!isFrozen(array)) {
            array[l] = lcElement;
          }
          element = lcElement;
        }
      }
      set[element] = true;
    }
    return set;
  }
  /**
   * Clean up an array to harden against CSPP
   *
   * @param array - The array to be cleaned.
   * @returns The cleaned version of the array
   */
  function cleanArray(array) {
    for (let index = 0; index < array.length; index++) {
      const isPropertyExist = objectHasOwnProperty(array, index);
      if (!isPropertyExist) {
        array[index] = null;
      }
    }
    return array;
  }
  /**
   * Shallow clone an object
   *
   * @param object - The object to be cloned.
   * @returns A new object that copies the original.
   */
  function clone(object) {
    const newObject = create(null);
    for (const [property, value] of entries(object)) {
      const isPropertyExist = objectHasOwnProperty(object, property);
      if (isPropertyExist) {
        if (Array.isArray(value)) {
          newObject[property] = cleanArray(value);
        } else if (value && typeof value === 'object' && value.constructor === Object) {
          newObject[property] = clone(value);
        } else {
          newObject[property] = value;
        }
      }
    }
    return newObject;
  }
  /**
   * This method automatically checks if the prop is function or getter and behaves accordingly.
   *
   * @param object - The object to look up the getter function in its prototype chain.
   * @param prop - The property name for which to find the getter function.
   * @returns The getter function found in the prototype chain or a fallback function.
   */
  function lookupGetter(object, prop) {
    while (object !== null) {
      const desc = getOwnPropertyDescriptor(object, prop);
      if (desc) {
        if (desc.get) {
          return unapply(desc.get);
        }
        if (typeof desc.value === 'function') {
          return unapply(desc.value);
        }
      }
      object = getPrototypeOf(object);
    }
    function fallbackValue() {
      return null;
    }
    return fallbackValue;
  }
  const html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']);
  const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
  const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']);
  // List of SVG elements that are disallowed by default.
  // We still need to know them so that we can do namespace
  // checks properly in case one wants to add them to
  // allow-list.
  const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
  const mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover', 'mprescripts']);
  // Similarly to SVG, we want to know all MathML elements,
  // even those that we disallow by default.
  const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
  const text = freeze(['#text']);
  const html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'popover', 'popovertarget', 'popovertargetaction', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'wrap', 'xmlns', 'slot']);
  const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'amplitude', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'exponent', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'intercept', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'slope', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'tablevalues', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
  const mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
  const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);

  // eslint-disable-next-line unicorn/better-regex
  const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
  const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
  const TMPLIT_EXPR = seal(/\$\{[\w\W]*}/gm); // eslint-disable-line unicorn/better-regex
  const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]+$/); // eslint-disable-line no-useless-escape
  const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
  const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
  );

  const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
  const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
  );

  const DOCTYPE_NAME = seal(/^html$/i);
  const CUSTOM_ELEMENT = seal(/^[a-z][.\w]*(-[.\w]+)+$/i);
  var EXPRESSIONS = /*#__PURE__*/Object.freeze({
    __proto__: null,
    ARIA_ATTR: ARIA_ATTR,
    ATTR_WHITESPACE: ATTR_WHITESPACE,
    CUSTOM_ELEMENT: CUSTOM_ELEMENT,
    DATA_ATTR: DATA_ATTR,
    DOCTYPE_NAME: DOCTYPE_NAME,
    ERB_EXPR: ERB_EXPR,
    IS_ALLOWED_URI: IS_ALLOWED_URI,
    IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
    MUSTACHE_EXPR: MUSTACHE_EXPR,
    TMPLIT_EXPR: TMPLIT_EXPR
  });

  /* eslint-disable @typescript-eslint/indent */
  // https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
  const NODE_TYPE = {
    element: 1,
    attribute: 2,
    text: 3,
    cdataSection: 4,
    entityReference: 5,
    // Deprecated
    entityNode: 6,
    // Deprecated
    progressingInstruction: 7,
    comment: 8,
    document: 9,
    documentType: 10,
    documentFragment: 11,
    notation: 12 // Deprecated
  };

  const getGlobal = function getGlobal() {
    return typeof window === 'undefined' ? null : window;
  };
  /**
   * Creates a no-op policy for internal use only.
   * Don't export this function outside this module!
   * @param trustedTypes The policy factory.
   * @param purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).
   * @return The policy created (or null, if Trusted Types
   * are not supported or creating the policy failed).
   */
  const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, purifyHostElement) {
    if (typeof trustedTypes !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
      return null;
    }
    // Allow the callers to control the unique policy name
    // by adding a data-tt-policy-suffix to the script element with the DOMPurify.
    // Policy creation with duplicate names throws in Trusted Types.
    let suffix = null;
    const ATTR_NAME = 'data-tt-policy-suffix';
    if (purifyHostElement && purifyHostElement.hasAttribute(ATTR_NAME)) {
      suffix = purifyHostElement.getAttribute(ATTR_NAME);
    }
    const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
    try {
      return trustedTypes.createPolicy(policyName, {
        createHTML(html) {
          return html;
        },
        createScriptURL(scriptUrl) {
          return scriptUrl;
        }
      });
    } catch (_) {
      // Policy creation failed (most likely another DOMPurify script has
      // already run). Skip creating the policy, as this will only cause errors
      // if TT are enforced.
      console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
      return null;
    }
  };
  const _createHooksMap = function _createHooksMap() {
    return {
      afterSanitizeAttributes: [],
      afterSanitizeElements: [],
      afterSanitizeShadowDOM: [],
      beforeSanitizeAttributes: [],
      beforeSanitizeElements: [],
      beforeSanitizeShadowDOM: [],
      uponSanitizeAttribute: [],
      uponSanitizeElement: [],
      uponSanitizeShadowNode: []
    };
  };
  function createDOMPurify() {
    let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
    const DOMPurify = root => createDOMPurify(root);
    DOMPurify.version = '3.2.3';
    DOMPurify.removed = [];
    if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document) {
      // Not running in a browser, provide a factory function
      // so that you can pass your own Window
      DOMPurify.isSupported = false;
      return DOMPurify;
    }
    let {
      document
    } = window;
    const originalDocument = document;
    const currentScript = originalDocument.currentScript;
    const {
      DocumentFragment,
      HTMLTemplateElement,
      Node,
      Element,
      NodeFilter,
      NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
      HTMLFormElement,
      DOMParser,
      trustedTypes
    } = window;
    const ElementPrototype = Element.prototype;
    const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
    const remove = lookupGetter(ElementPrototype, 'remove');
    const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
    const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
    const getParentNode = lookupGetter(ElementPrototype, 'parentNode');
    // As per issue #47, the web-components registry is inherited by a
    // new document created via createHTMLDocument. As per the spec
    // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
    // a new empty registry is used when creating a template contents owner
    // document, so we use that as our parent document to ensure nothing
    // is inherited.
    if (typeof HTMLTemplateElement === 'function') {
      const template = document.createElement('template');
      if (template.content && template.content.ownerDocument) {
        document = template.content.ownerDocument;
      }
    }
    let trustedTypesPolicy;
    let emptyHTML = '';
    const {
      implementation,
      createNodeIterator,
      createDocumentFragment,
      getElementsByTagName
    } = document;
    const {
      importNode
    } = originalDocument;
    let hooks = _createHooksMap();
    /**
     * Expose whether this browser supports running the full DOMPurify.
     */
    DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;
    const {
      MUSTACHE_EXPR,
      ERB_EXPR,
      TMPLIT_EXPR,
      DATA_ATTR,
      ARIA_ATTR,
      IS_SCRIPT_OR_DATA,
      ATTR_WHITESPACE,
      CUSTOM_ELEMENT
    } = EXPRESSIONS;
    let {
      IS_ALLOWED_URI: IS_ALLOWED_URI$1
    } = EXPRESSIONS;
    /**
     * We consider the elements and attributes below to be safe. Ideally
     * don't add any new ones but feel free to remove unwanted ones.
     */
    /* allowed element names */
    let ALLOWED_TAGS = null;
    const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
    /* Allowed attribute names */
    let ALLOWED_ATTR = null;
    const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...xml]);
    /*
     * Configure how DOMPurify should handle custom elements and their attributes as well as customized built-in elements.
     * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
     * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
     * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
     */
    let CUSTOM_ELEMENT_HANDLING = Object.seal(create(null, {
      tagNameCheck: {
        writable: true,
        configurable: false,
        enumerable: true,
        value: null
      },
      attributeNameCheck: {
        writable: true,
        configurable: false,
        enumerable: true,
        value: null
      },
      allowCustomizedBuiltInElements: {
        writable: true,
        configurable: false,
        enumerable: true,
        value: false
      }
    }));
    /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
    let FORBID_TAGS = null;
    /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
    let FORBID_ATTR = null;
    /* Decide if ARIA attributes are okay */
    let ALLOW_ARIA_ATTR = true;
    /* Decide if custom data attributes are okay */
    let ALLOW_DATA_ATTR = true;
    /* Decide if unknown protocols are okay */
    let ALLOW_UNKNOWN_PROTOCOLS = false;
    /* Decide if self-closing tags in attributes are allowed.
     * Usually removed due to a mXSS issue in jQuery 3.0 */
    let ALLOW_SELF_CLOSE_IN_ATTR = true;
    /* Output should be safe for common template engines.
     * This means, DOMPurify removes data attributes, mustaches and ERB
     */
    let SAFE_FOR_TEMPLATES = false;
    /* Output should be safe even for XML used within HTML and alike.
     * This means, DOMPurify removes comments when containing risky content.
     */
    let SAFE_FOR_XML = true;
    /* Decide if document with <html>... should be returned */
    let WHOLE_DOCUMENT = false;
    /* Track whether config is already set on this instance of DOMPurify. */
    let SET_CONFIG = false;
    /* Decide if all elements (e.g. style, script) must be children of
     * document.body. By default, browsers might move them to document.head */
    let FORCE_BODY = false;
    /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
     * string (or a TrustedHTML object if Trusted Types are supported).
     * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
     */
    let RETURN_DOM = false;
    /* Decide if a DOM `DocumentFragment` should be returned, instead of a html
     * string  (or a TrustedHTML object if Trusted Types are supported) */
    let RETURN_DOM_FRAGMENT = false;
    /* Try to return a Trusted Type object instead of a string, return a string in
     * case Trusted Types are not supported  */
    let RETURN_TRUSTED_TYPE = false;
    /* Output should be free from DOM clobbering attacks?
     * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
     */
    let SANITIZE_DOM = true;
    /* Achieve full DOM Clobbering protection by isolating the namespace of named
     * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
     *
     * HTML/DOM spec rules that enable DOM Clobbering:
     *   - Named Access on Window (§7.3.3)
     *   - DOM Tree Accessors (§3.1.5)
     *   - Form Element Parent-Child Relations (§4.10.3)
     *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)
     *   - HTMLCollection (§4.2.10.2)
     *
     * Namespace isolation is implemented by prefixing `id` and `name` attributes
     * with a constant string, i.e., `user-content-`
     */
    let SANITIZE_NAMED_PROPS = false;
    const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
    /* Keep element content when removing element? */
    let KEEP_CONTENT = true;
    /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
     * of importing it into a new Document and returning a sanitized copy */
    let IN_PLACE = false;
    /* Allow usage of profiles like html, svg and mathMl */
    let USE_PROFILES = {};
    /* Tags to ignore content of when KEEP_CONTENT is true */
    let FORBID_CONTENTS = null;
    const DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
    /* Tags that are safe for data: URIs */
    let DATA_URI_TAGS = null;
    const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
    /* Attributes safe for values like "javascript:" */
    let URI_SAFE_ATTRIBUTES = null;
    const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
    const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
    const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
    const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
    /* Document namespace */
    let NAMESPACE = HTML_NAMESPACE;
    let IS_EMPTY_INPUT = false;
    /* Allowed XHTML+XML namespaces */
    let ALLOWED_NAMESPACES = null;
    const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
    let MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
    let HTML_INTEGRATION_POINTS = addToSet({}, ['annotation-xml']);
    // Certain elements are allowed in both SVG and HTML
    // namespace. We need to specify them explicitly
    // so that they don't get erroneously deleted from
    // HTML namespace.
    const COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
    /* Parsing of strict XHTML documents */
    let PARSER_MEDIA_TYPE = null;
    const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
    const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
    let transformCaseFunc = null;
    /* Keep a reference to config to pass to hooks */
    let CONFIG = null;
    /* Ideally, do not touch anything below this line */
    /* ______________________________________________ */
    const formElement = document.createElement('form');
    const isRegexOrFunction = function isRegexOrFunction(testValue) {
      return testValue instanceof RegExp || testValue instanceof Function;
    };
    /**
     * _parseConfig
     *
     * @param cfg optional config literal
     */
    // eslint-disable-next-line complexity
    const _parseConfig = function _parseConfig() {
      let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      if (CONFIG && CONFIG === cfg) {
        return;
      }
      /* Shield configuration object from tampering */
      if (!cfg || typeof cfg !== 'object') {
        cfg = {};
      }
      /* Shield configuration object from prototype pollution */
      cfg = clone(cfg);
      PARSER_MEDIA_TYPE =
      // eslint-disable-next-line unicorn/prefer-includes
      SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? DEFAULT_PARSER_MEDIA_TYPE : cfg.PARSER_MEDIA_TYPE;
      // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
      transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
      /* Set configuration parameters */
      ALLOWED_TAGS = objectHasOwnProperty(cfg, 'ALLOWED_TAGS') ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
      ALLOWED_ATTR = objectHasOwnProperty(cfg, 'ALLOWED_ATTR') ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
      ALLOWED_NAMESPACES = objectHasOwnProperty(cfg, 'ALLOWED_NAMESPACES') ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
      URI_SAFE_ATTRIBUTES = objectHasOwnProperty(cfg, 'ADD_URI_SAFE_ATTR') ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR, transformCaseFunc) : DEFAULT_URI_SAFE_ATTRIBUTES;
      DATA_URI_TAGS = objectHasOwnProperty(cfg, 'ADD_DATA_URI_TAGS') ? addToSet(clone(DEFAULT_DATA_URI_TAGS), cfg.ADD_DATA_URI_TAGS, transformCaseFunc) : DEFAULT_DATA_URI_TAGS;
      FORBID_CONTENTS = objectHasOwnProperty(cfg, 'FORBID_CONTENTS') ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
      FORBID_TAGS = objectHasOwnProperty(cfg, 'FORBID_TAGS') ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
      FORBID_ATTR = objectHasOwnProperty(cfg, 'FORBID_ATTR') ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
      USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? cfg.USE_PROFILES : false;
      ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
      ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
      ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
      ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
      SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
      SAFE_FOR_XML = cfg.SAFE_FOR_XML !== false; // Default true
      WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
      RETURN_DOM = cfg.RETURN_DOM || false; // Default false
      RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
      RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
      FORCE_BODY = cfg.FORCE_BODY || false; // Default false
      SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
      SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
      KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
      IN_PLACE = cfg.IN_PLACE || false; // Default false
      IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;
      NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
      MATHML_TEXT_INTEGRATION_POINTS = cfg.MATHML_TEXT_INTEGRATION_POINTS || MATHML_TEXT_INTEGRATION_POINTS;
      HTML_INTEGRATION_POINTS = cfg.HTML_INTEGRATION_POINTS || HTML_INTEGRATION_POINTS;
      CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
      if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
        CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
      }
      if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
        CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
      }
      if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
        CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
      }
      if (SAFE_FOR_TEMPLATES) {
        ALLOW_DATA_ATTR = false;
      }
      if (RETURN_DOM_FRAGMENT) {
        RETURN_DOM = true;
      }
      /* Parse profile info */
      if (USE_PROFILES) {
        ALLOWED_TAGS = addToSet({}, text);
        ALLOWED_ATTR = [];
        if (USE_PROFILES.html === true) {
          addToSet(ALLOWED_TAGS, html$1);
          addToSet(ALLOWED_ATTR, html);
        }
        if (USE_PROFILES.svg === true) {
          addToSet(ALLOWED_TAGS, svg$1);
          addToSet(ALLOWED_ATTR, svg);
          addToSet(ALLOWED_ATTR, xml);
        }
        if (USE_PROFILES.svgFilters === true) {
          addToSet(ALLOWED_TAGS, svgFilters);
          addToSet(ALLOWED_ATTR, svg);
          addToSet(ALLOWED_ATTR, xml);
        }
        if (USE_PROFILES.mathMl === true) {
          addToSet(ALLOWED_TAGS, mathMl$1);
          addToSet(ALLOWED_ATTR, mathMl);
          addToSet(ALLOWED_ATTR, xml);
        }
      }
      /* Merge configuration parameters */
      if (cfg.ADD_TAGS) {
        if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
          ALLOWED_TAGS = clone(ALLOWED_TAGS);
        }
        addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
      }
      if (cfg.ADD_ATTR) {
        if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
          ALLOWED_ATTR = clone(ALLOWED_ATTR);
        }
        addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
      }
      if (cfg.ADD_URI_SAFE_ATTR) {
        addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
      }
      if (cfg.FORBID_CONTENTS) {
        if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
          FORBID_CONTENTS = clone(FORBID_CONTENTS);
        }
        addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
      }
      /* Add #text in case KEEP_CONTENT is set to true */
      if (KEEP_CONTENT) {
        ALLOWED_TAGS['#text'] = true;
      }
      /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
      if (WHOLE_DOCUMENT) {
        addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
      }
      /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
      if (ALLOWED_TAGS.table) {
        addToSet(ALLOWED_TAGS, ['tbody']);
        delete FORBID_TAGS.tbody;
      }
      if (cfg.TRUSTED_TYPES_POLICY) {
        if (typeof cfg.TRUSTED_TYPES_POLICY.createHTML !== 'function') {
          throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createHTML" hook.');
        }
        if (typeof cfg.TRUSTED_TYPES_POLICY.createScriptURL !== 'function') {
          throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createScriptURL" hook.');
        }
        // Overwrite existing TrustedTypes policy.
        trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;
        // Sign local variables required by `sanitize`.
        emptyHTML = trustedTypesPolicy.createHTML('');
      } else {
        // Uninitialized policy, attempt to initialize the internal dompurify policy.
        if (trustedTypesPolicy === undefined) {
          trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);
        }
        // If creating the internal policy succeeded sign internal variables.
        if (trustedTypesPolicy !== null && typeof emptyHTML === 'string') {
          emptyHTML = trustedTypesPolicy.createHTML('');
        }
      }
      // Prevent further manipulation of configuration.
      // Not available in IE8, Safari 5, etc.
      if (freeze) {
        freeze(cfg);
      }
      CONFIG = cfg;
    };
    /* Keep track of all possible SVG and MathML tags
     * so that we can perform the namespace checks
     * correctly. */
    const ALL_SVG_TAGS = addToSet({}, [...svg$1, ...svgFilters, ...svgDisallowed]);
    const ALL_MATHML_TAGS = addToSet({}, [...mathMl$1, ...mathMlDisallowed]);
    /**
     * @param element a DOM element whose namespace is being checked
     * @returns Return false if the element has a
     *  namespace that a spec-compliant parser would never
     *  return. Return true otherwise.
     */
    const _checkValidNamespace = function _checkValidNamespace(element) {
      let parent = getParentNode(element);
      // In JSDOM, if we're inside shadow DOM, then parentNode
      // can be null. We just simulate parent in this case.
      if (!parent || !parent.tagName) {
        parent = {
          namespaceURI: NAMESPACE,
          tagName: 'template'
        };
      }
      const tagName = stringToLowerCase(element.tagName);
      const parentTagName = stringToLowerCase(parent.tagName);
      if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
        return false;
      }
      if (element.namespaceURI === SVG_NAMESPACE) {
        // The only way to switch from HTML namespace to SVG
        // is via <svg>. If it happens via any other tag, then
        // it should be killed.
        if (parent.namespaceURI === HTML_NAMESPACE) {
          return tagName === 'svg';
        }
        // The only way to switch from MathML to SVG is via`
        // svg if parent is either <annotation-xml> or MathML
        // text integration points.
        if (parent.namespaceURI === MATHML_NAMESPACE) {
          return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
        }
        // We only allow elements that are defined in SVG
        // spec. All others are disallowed in SVG namespace.
        return Boolean(ALL_SVG_TAGS[tagName]);
      }
      if (element.namespaceURI === MATHML_NAMESPACE) {
        // The only way to switch from HTML namespace to MathML
        // is via <math>. If it happens via any other tag, then
        // it should be killed.
        if (parent.namespaceURI === HTML_NAMESPACE) {
          return tagName === 'math';
        }
        // The only way to switch from SVG to MathML is via
        // <math> and HTML integration points
        if (parent.namespaceURI === SVG_NAMESPACE) {
          return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
        }
        // We only allow elements that are defined in MathML
        // spec. All others are disallowed in MathML namespace.
        return Boolean(ALL_MATHML_TAGS[tagName]);
      }
      if (element.namespaceURI === HTML_NAMESPACE) {
        // The only way to switch from SVG to HTML is via
        // HTML integration points, and from MathML to HTML
        // is via MathML text integration points
        if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
          return false;
        }
        if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
          return false;
        }
        // We disallow tags that are specific for MathML
        // or SVG and should never appear in HTML namespace
        return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
      }
      // For XHTML and XML documents that support custom namespaces
      if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
        return true;
      }
      // The code should never reach this place (this means
      // that the element somehow got namespace that is not
      // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
      // Return false just in case.
      return false;
    };
    /**
     * _forceRemove
     *
     * @param node a DOM node
     */
    const _forceRemove = function _forceRemove(node) {
      arrayPush(DOMPurify.removed, {
        element: node
      });
      try {
        // eslint-disable-next-line unicorn/prefer-dom-node-remove
        getParentNode(node).removeChild(node);
      } catch (_) {
        remove(node);
      }
    };
    /**
     * _removeAttribute
     *
     * @param name an Attribute name
     * @param element a DOM node
     */
    const _removeAttribute = function _removeAttribute(name, element) {
      try {
        arrayPush(DOMPurify.removed, {
          attribute: element.getAttributeNode(name),
          from: element
        });
      } catch (_) {
        arrayPush(DOMPurify.removed, {
          attribute: null,
          from: element
        });
      }
      element.removeAttribute(name);
      // We void attribute values for unremovable "is" attributes
      if (name === 'is') {
        if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
          try {
            _forceRemove(element);
          } catch (_) {}
        } else {
          try {
            element.setAttribute(name, '');
          } catch (_) {}
        }
      }
    };
    /**
     * _initDocument
     *
     * @param dirty - a string of dirty markup
     * @return a DOM, filled with the dirty markup
     */
    const _initDocument = function _initDocument(dirty) {
      /* Create a HTML document */
      let doc = null;
      let leadingWhitespace = null;
      if (FORCE_BODY) {
        dirty = '<remove></remove>' + dirty;
      } else {
        /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
        const matches = stringMatch(dirty, /^[\r\n\t ]+/);
        leadingWhitespace = matches && matches[0];
      }
      if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
        // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
        dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
      }
      const dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
      /*
       * Use the DOMParser API by default, fallback later if needs be
       * DOMParser not work for svg when has multiple root element.
       */
      if (NAMESPACE === HTML_NAMESPACE) {
        try {
          doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
        } catch (_) {}
      }
      /* Use createHTMLDocument in case DOMParser is not available */
      if (!doc || !doc.documentElement) {
        doc = implementation.createDocument(NAMESPACE, 'template', null);
        try {
          doc.documentElement.innerHTML = IS_EMPTY_INPUT ? emptyHTML : dirtyPayload;
        } catch (_) {
          // Syntax error if dirtyPayload is invalid xml
        }
      }
      const body = doc.body || doc.documentElement;
      if (dirty && leadingWhitespace) {
        body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
      }
      /* Work on whole document or just its body */
      if (NAMESPACE === HTML_NAMESPACE) {
        return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
      }
      return WHOLE_DOCUMENT ? doc.documentElement : body;
    };
    /**
     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
     *
     * @param root The root element or node to start traversing on.
     * @return The created NodeIterator
     */
    const _createNodeIterator = function _createNodeIterator(root) {
      return createNodeIterator.call(root.ownerDocument || root, root,
      // eslint-disable-next-line no-bitwise
      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT | NodeFilter.SHOW_PROCESSING_INSTRUCTION | NodeFilter.SHOW_CDATA_SECTION, null);
    };
    /**
     * _isClobbered
     *
     * @param element element to check for clobbering attacks
     * @return true if clobbered, false if safe
     */
    const _isClobbered = function _isClobbered(element) {
      return element instanceof HTMLFormElement && (typeof element.nodeName !== 'string' || typeof element.textContent !== 'string' || typeof element.removeChild !== 'function' || !(element.attributes instanceof NamedNodeMap) || typeof element.removeAttribute !== 'function' || typeof element.setAttribute !== 'function' || typeof element.namespaceURI !== 'string' || typeof element.insertBefore !== 'function' || typeof element.hasChildNodes !== 'function');
    };
    /**
     * Checks whether the given object is a DOM node.
     *
     * @param value object to check whether it's a DOM node
     * @return true is object is a DOM node
     */
    const _isNode = function _isNode(value) {
      return typeof Node === 'function' && value instanceof Node;
    };
    function _executeHooks(hooks, currentNode, data) {
      arrayForEach(hooks, hook => {
        hook.call(DOMPurify, currentNode, data, CONFIG);
      });
    }
    /**
     * _sanitizeElements
     *
     * @protect nodeName
     * @protect textContent
     * @protect removeChild
     * @param currentNode to check for permission to exist
     * @return true if node was killed, false if left alive
     */
    const _sanitizeElements = function _sanitizeElements(currentNode) {
      let content = null;
      /* Execute a hook if present */
      _executeHooks(hooks.beforeSanitizeElements, currentNode, null);
      /* Check if element is clobbered or can clobber */
      if (_isClobbered(currentNode)) {
        _forceRemove(currentNode);
        return true;
      }
      /* Now let's check the element's type and name */
      const tagName = transformCaseFunc(currentNode.nodeName);
      /* Execute a hook if present */
      _executeHooks(hooks.uponSanitizeElement, currentNode, {
        tagName,
        allowedTags: ALLOWED_TAGS
      });
      /* Detect mXSS attempts abusing namespace confusion */
      if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
        _forceRemove(currentNode);
        return true;
      }
      /* Remove any occurrence of processing instructions */
      if (currentNode.nodeType === NODE_TYPE.progressingInstruction) {
        _forceRemove(currentNode);
        return true;
      }
      /* Remove any kind of possibly harmful comments */
      if (SAFE_FOR_XML && currentNode.nodeType === NODE_TYPE.comment && regExpTest(/<[/\w]/g, currentNode.data)) {
        _forceRemove(currentNode);
        return true;
      }
      /* Remove element if anything forbids its presence */
      if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
        /* Check if we have a custom element to handle */
        if (!FORBID_TAGS[tagName] && _isBasicCustomElement(tagName)) {
          if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) {
            return false;
          }
          if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) {
            return false;
          }
        }
        /* Keep content except for bad-listed elements */
        if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
          const parentNode = getParentNode(currentNode) || currentNode.parentNode;
          const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
          if (childNodes && parentNode) {
            const childCount = childNodes.length;
            for (let i = childCount - 1; i >= 0; --i) {
              const childClone = cloneNode(childNodes[i], true);
              childClone.__removalCount = (currentNode.__removalCount || 0) + 1;
              parentNode.insertBefore(childClone, getNextSibling(currentNode));
            }
          }
        }
        _forceRemove(currentNode);
        return true;
      }
      /* Check whether element has a valid namespace */
      if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
        _forceRemove(currentNode);
        return true;
      }
      /* Make sure that older browsers don't get fallback-tag mXSS */
      if ((tagName === 'noscript' || tagName === 'noembed' || tagName === 'noframes') && regExpTest(/<\/no(script|embed|frames)/i, currentNode.innerHTML)) {
        _forceRemove(currentNode);
        return true;
      }
      /* Sanitize element content to be template-safe */
      if (SAFE_FOR_TEMPLATES && currentNode.nodeType === NODE_TYPE.text) {
        /* Get the element's text content */
        content = currentNode.textContent;
        arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
          content = stringReplace(content, expr, ' ');
        });
        if (currentNode.textContent !== content) {
          arrayPush(DOMPurify.removed, {
            element: currentNode.cloneNode()
          });
          currentNode.textContent = content;
        }
      }
      /* Execute a hook if present */
      _executeHooks(hooks.afterSanitizeElements, currentNode, null);
      return false;
    };
    /**
     * _isValidAttribute
     *
     * @param lcTag Lowercase tag name of containing element.
     * @param lcName Lowercase attribute name.
     * @param value Attribute value.
     * @return Returns true if `value` is valid, otherwise false.
     */
    // eslint-disable-next-line complexity
    const _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
      /* Make sure attribute cannot clobber */
      if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
        return false;
      }
      /* Allow valid data-* attributes: At least one character after "-"
          (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
          XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
          We don't need to check the value; it's always URI safe. */
      if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR, lcName)) ;else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, lcName)) ;else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
        if (
        // First condition does a very basic check if a) it's basically a valid custom element tagname AND
        // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
        // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
        _isBasicCustomElement(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) ||
        // Alternative, second condition checks if it's an `is`-attribute, AND
        // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
        lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))) ;else {
          return false;
        }
        /* Check value is safe. First, is attr inert? If so, is safe */
      } else if (URI_SAFE_ATTRIBUTES[lcName]) ;else if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE, ''))) ;else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ;else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA, stringReplace(value, ATTR_WHITESPACE, ''))) ;else if (value) {
        return false;
      } else ;
      return true;
    };
    /**
     * _isBasicCustomElement
     * checks if at least one dash is included in tagName, and it's not the first char
     * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name
     *
     * @param tagName name of the tag of the node to sanitize
     * @returns Returns true if the tag name meets the basic criteria for a custom element, otherwise false.
     */
    const _isBasicCustomElement = function _isBasicCustomElement(tagName) {
      return tagName !== 'annotation-xml' && stringMatch(tagName, CUSTOM_ELEMENT);
    };
    /**
     * _sanitizeAttributes
     *
     * @protect attributes
     * @protect nodeName
     * @protect removeAttribute
     * @protect setAttribute
     *
     * @param currentNode to sanitize
     */
    const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
      /* Execute a hook if present */
      _executeHooks(hooks.beforeSanitizeAttributes, currentNode, null);
      const {
        attributes
      } = currentNode;
      /* Check if we have attributes; if not we might have a text node */
      if (!attributes || _isClobbered(currentNode)) {
        return;
      }
      const hookEvent = {
        attrName: '',
        attrValue: '',
        keepAttr: true,
        allowedAttributes: ALLOWED_ATTR,
        forceKeepAttr: undefined
      };
      let l = attributes.length;
      /* Go backwards over all attributes; safely remove bad ones */
      while (l--) {
        const attr = attributes[l];
        const {
          name,
          namespaceURI,
          value: attrValue
        } = attr;
        const lcName = transformCaseFunc(name);
        let value = name === 'value' ? attrValue : stringTrim(attrValue);
        /* Execute a hook if present */
        hookEvent.attrName = lcName;
        hookEvent.attrValue = value;
        hookEvent.keepAttr = true;
        hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set
        _executeHooks(hooks.uponSanitizeAttribute, currentNode, hookEvent);
        value = hookEvent.attrValue;
        /* Full DOM Clobbering protection via namespace isolation,
         * Prefix id and name attributes with `user-content-`
         */
        if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {
          // Remove the attribute with this value
          _removeAttribute(name, currentNode);
          // Prefix the value and later re-create the attribute with the sanitized value
          value = SANITIZE_NAMED_PROPS_PREFIX + value;
        }
        /* Work around a security issue with comments inside attributes */
        if (SAFE_FOR_XML && regExpTest(/((--!?|])>)|<\/(style|title)/i, value)) {
          _removeAttribute(name, currentNode);
          continue;
        }
        /* Did the hooks approve of the attribute? */
        if (hookEvent.forceKeepAttr) {
          continue;
        }
        /* Remove attribute */
        _removeAttribute(name, currentNode);
        /* Did the hooks approve of the attribute? */
        if (!hookEvent.keepAttr) {
          continue;
        }
        /* Work around a security issue in jQuery 3.0 */
        if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
          _removeAttribute(name, currentNode);
          continue;
        }
        /* Sanitize attribute content to be template-safe */
        if (SAFE_FOR_TEMPLATES) {
          arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
            value = stringReplace(value, expr, ' ');
          });
        }
        /* Is `value` valid for this attribute? */
        const lcTag = transformCaseFunc(currentNode.nodeName);
        if (!_isValidAttribute(lcTag, lcName, value)) {
          continue;
        }
        /* Handle attributes that require Trusted Types */
        if (trustedTypesPolicy && typeof trustedTypes === 'object' && typeof trustedTypes.getAttributeType === 'function') {
          if (namespaceURI) ;else {
            switch (trustedTypes.getAttributeType(lcTag, lcName)) {
              case 'TrustedHTML':
                {
                  value = trustedTypesPolicy.createHTML(value);
                  break;
                }
              case 'TrustedScriptURL':
                {
                  value = trustedTypesPolicy.createScriptURL(value);
                  break;
                }
            }
          }
        }
        /* Handle invalid data-* attribute set by try-catching it */
        try {
          if (namespaceURI) {
            currentNode.setAttributeNS(namespaceURI, name, value);
          } else {
            /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
            currentNode.setAttribute(name, value);
          }
          if (_isClobbered(currentNode)) {
            _forceRemove(currentNode);
          } else {
            arrayPop(DOMPurify.removed);
          }
        } catch (_) {}
      }
      /* Execute a hook if present */
      _executeHooks(hooks.afterSanitizeAttributes, currentNode, null);
    };
    /**
     * _sanitizeShadowDOM
     *
     * @param fragment to iterate over recursively
     */
    const _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
      let shadowNode = null;
      const shadowIterator = _createNodeIterator(fragment);
      /* Execute a hook if present */
      _executeHooks(hooks.beforeSanitizeShadowDOM, fragment, null);
      while (shadowNode = shadowIterator.nextNode()) {
        /* Execute a hook if present */
        _executeHooks(hooks.uponSanitizeShadowNode, shadowNode, null);
        /* Sanitize tags and elements */
        _sanitizeElements(shadowNode);
        /* Check attributes next */
        _sanitizeAttributes(shadowNode);
        /* Deep shadow DOM detected */
        if (shadowNode.content instanceof DocumentFragment) {
          _sanitizeShadowDOM(shadowNode.content);
        }
      }
      /* Execute a hook if present */
      _executeHooks(hooks.afterSanitizeShadowDOM, fragment, null);
    };
    // eslint-disable-next-line complexity
    DOMPurify.sanitize = function (dirty) {
      let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let body = null;
      let importedNode = null;
      let currentNode = null;
      let returnNode = null;
      /* Make sure we have a string to sanitize.
        DO NOT return early, as this will return the wrong type if
        the user has requested a DOM object rather than a string */
      IS_EMPTY_INPUT = !dirty;
      if (IS_EMPTY_INPUT) {
        dirty = '<!-->';
      }
      /* Stringify, in case dirty is an object */
      if (typeof dirty !== 'string' && !_isNode(dirty)) {
        if (typeof dirty.toString === 'function') {
          dirty = dirty.toString();
          if (typeof dirty !== 'string') {
            throw typeErrorCreate('dirty is not a string, aborting');
          }
        } else {
          throw typeErrorCreate('toString is not a function');
        }
      }
      /* Return dirty HTML if DOMPurify cannot run */
      if (!DOMPurify.isSupported) {
        return dirty;
      }
      /* Assign config vars */
      if (!SET_CONFIG) {
        _parseConfig(cfg);
      }
      /* Clean up removed elements */
      DOMPurify.removed = [];
      /* Check if dirty is correctly typed for IN_PLACE */
      if (typeof dirty === 'string') {
        IN_PLACE = false;
      }
      if (IN_PLACE) {
        /* Do some early pre-sanitization to avoid unsafe root nodes */
        if (dirty.nodeName) {
          const tagName = transformCaseFunc(dirty.nodeName);
          if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
            throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');
          }
        }
      } else if (dirty instanceof Node) {
        /* If dirty is a DOM element, append to an empty document to avoid
           elements being stripped by the parser */
        body = _initDocument('<!---->');
        importedNode = body.ownerDocument.importNode(dirty, true);
        if (importedNode.nodeType === NODE_TYPE.element && importedNode.nodeName === 'BODY') {
          /* Node is already a body, use as is */
          body = importedNode;
        } else if (importedNode.nodeName === 'HTML') {
          body = importedNode;
        } else {
          // eslint-disable-next-line unicorn/prefer-dom-node-append
          body.appendChild(importedNode);
        }
      } else {
        /* Exit directly if we have nothing to do */
        if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT &&
        // eslint-disable-next-line unicorn/prefer-includes
        dirty.indexOf('<') === -1) {
          return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(dirty) : dirty;
        }
        /* Initialize the document to work on */
        body = _initDocument(dirty);
        /* Check we have a DOM node from the data */
        if (!body) {
          return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';
        }
      }
      /* Remove first element node (ours) if FORCE_BODY is set */
      if (body && FORCE_BODY) {
        _forceRemove(body.firstChild);
      }
      /* Get node iterator */
      const nodeIterator = _createNodeIterator(IN_PLACE ? dirty : body);
      /* Now start iterating over the created document */
      while (currentNode = nodeIterator.nextNode()) {
        /* Sanitize tags and elements */
        _sanitizeElements(currentNode);
        /* Check attributes next */
        _sanitizeAttributes(currentNode);
        /* Shadow DOM detected, sanitize it */
        if (currentNode.content instanceof DocumentFragment) {
          _sanitizeShadowDOM(currentNode.content);
        }
      }
      /* If we sanitized `dirty` in-place, return it. */
      if (IN_PLACE) {
        return dirty;
      }
      /* Return sanitized string or DOM */
      if (RETURN_DOM) {
        if (RETURN_DOM_FRAGMENT) {
          returnNode = createDocumentFragment.call(body.ownerDocument);
          while (body.firstChild) {
            // eslint-disable-next-line unicorn/prefer-dom-node-append
            returnNode.appendChild(body.firstChild);
          }
        } else {
          returnNode = body;
        }
        if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmode) {
          /*
            AdoptNode() is not used because internal state is not reset
            (e.g. the past names map of a HTMLFormElement), this is safe
            in theory but we would rather not risk another attack vector.
            The state that is cloned by importNode() is explicitly defined
            by the specs.
          */
          returnNode = importNode.call(originalDocument, returnNode, true);
        }
        return returnNode;
      }
      let serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
      /* Serialize doctype if allowed */
      if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {
        serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\n' + serializedHTML;
      }
      /* Sanitize final string template-safe */
      if (SAFE_FOR_TEMPLATES) {
        arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
          serializedHTML = stringReplace(serializedHTML, expr, ' ');
        });
      }
      return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(serializedHTML) : serializedHTML;
    };
    DOMPurify.setConfig = function () {
      let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      _parseConfig(cfg);
      SET_CONFIG = true;
    };
    DOMPurify.clearConfig = function () {
      CONFIG = null;
      SET_CONFIG = false;
    };
    DOMPurify.isValidAttribute = function (tag, attr, value) {
      /* Initialize shared config vars if necessary. */
      if (!CONFIG) {
        _parseConfig({});
      }
      const lcTag = transformCaseFunc(tag);
      const lcName = transformCaseFunc(attr);
      return _isValidAttribute(lcTag, lcName, value);
    };
    DOMPurify.addHook = function (entryPoint, hookFunction) {
      if (typeof hookFunction !== 'function') {
        return;
      }
      arrayPush(hooks[entryPoint], hookFunction);
    };
    DOMPurify.removeHook = function (entryPoint) {
      return arrayPop(hooks[entryPoint]);
    };
    DOMPurify.removeHooks = function (entryPoint) {
      hooks[entryPoint] = [];
    };
    DOMPurify.removeAllHooks = function () {
      hooks = _createHooksMap();
    };
    return DOMPurify;
  }
  var purify = createDOMPurify();

  purify.addHook("uponSanitizeAttribute", function (node, data) {
    const allowedAttributePattern = /^data-trix-/;
    if (allowedAttributePattern.test(data.attrName)) {
      data.forceKeepAttr = true;
    }
  });
  const DEFAULT_ALLOWED_ATTRIBUTES = "style href src width height language class".split(" ");
  const DEFAULT_FORBIDDEN_PROTOCOLS = "javascript:".split(" ");
  const DEFAULT_FORBIDDEN_ELEMENTS = "script iframe form noscript".split(" ");
  class HTMLSanitizer extends BasicObject {
    static setHTML(element, html) {
      const sanitizedElement = new this(html).sanitize();
      const sanitizedHtml = sanitizedElement.getHTML ? sanitizedElement.getHTML() : sanitizedElement.outerHTML;
      element.innerHTML = sanitizedHtml;
    }
    static sanitize(html, options) {
      const sanitizer = new this(html, options);
      sanitizer.sanitize();
      return sanitizer;
    }
    constructor(html) {
      let {
        allowedAttributes,
        forbiddenProtocols,
        forbiddenElements
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      super(...arguments);
      this.allowedAttributes = allowedAttributes || DEFAULT_ALLOWED_ATTRIBUTES;
      this.forbiddenProtocols = forbiddenProtocols || DEFAULT_FORBIDDEN_PROTOCOLS;
      this.forbiddenElements = forbiddenElements || DEFAULT_FORBIDDEN_ELEMENTS;
      this.body = createBodyElementForHTML(html);
    }
    sanitize() {
      this.sanitizeElements();
      this.normalizeListElementNesting();
      purify.setConfig(dompurify);
      this.body = purify.sanitize(this.body);
      return this.body;
    }
    getHTML() {
      return this.body.innerHTML;
    }
    getBody() {
      return this.body;
    }

    // Private

    sanitizeElements() {
      const walker = walkTree(this.body);
      const nodesToRemove = [];
      while (walker.nextNode()) {
        const node = walker.currentNode;
        switch (node.nodeType) {
          case Node.ELEMENT_NODE:
            if (this.elementIsRemovable(node)) {
              nodesToRemove.push(node);
            } else {
              this.sanitizeElement(node);
            }
            break;
          case Node.COMMENT_NODE:
            nodesToRemove.push(node);
            break;
        }
      }
      nodesToRemove.forEach(node => removeNode(node));
      return this.body;
    }
    sanitizeElement(element) {
      if (element.hasAttribute("href")) {
        if (this.forbiddenProtocols.includes(element.protocol)) {
          element.removeAttribute("href");
        }
      }
      Array.from(element.attributes).forEach(_ref => {
        let {
          name
        } = _ref;
        if (!this.allowedAttributes.includes(name) && name.indexOf("data-trix") !== 0) {
          element.removeAttribute(name);
        }
      });
      return element;
    }
    normalizeListElementNesting() {
      Array.from(this.body.querySelectorAll("ul,ol")).forEach(listElement => {
        const previousElement = listElement.previousElementSibling;
        if (previousElement) {
          if (tagName(previousElement) === "li") {
            previousElement.appendChild(listElement);
          }
        }
      });
      return this.body;
    }
    elementIsRemovable(element) {
      if ((element === null || element === void 0 ? void 0 : element.nodeType) !== Node.ELEMENT_NODE) return;
      return this.elementIsForbidden(element) || this.elementIsntSerializable(element);
    }
    elementIsForbidden(element) {
      return this.forbiddenElements.includes(tagName(element));
    }
    elementIsntSerializable(element) {
      return element.getAttribute("data-trix-serialize") === "false" && !nodeIsAttachmentElement(element);
    }
  }
  const createBodyElementForHTML = function () {
    let html = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "";
    // Remove everything after </html>
    html = html.replace(/<\/html[^>]*>[^]*$/i, "</html>");
    const doc = document.implementation.createHTMLDocument("");
    doc.documentElement.innerHTML = html;
    Array.from(doc.head.querySelectorAll("style")).forEach(element => {
      doc.body.appendChild(element);
    });
    return doc.body;
  };

  const {
    css: css$2
  } = config;
  class AttachmentView extends ObjectView {
    constructor() {
      super(...arguments);
      this.attachment = this.object;
      this.attachment.uploadProgressDelegate = this;
      this.attachmentPiece = this.options.piece;
    }
    createContentNodes() {
      return [];
    }
    createNodes() {
      let innerElement;
      const figure = innerElement = makeElement({
        tagName: "figure",
        className: this.getClassName(),
        data: this.getData(),
        editable: false
      });
      const href = this.getHref();
      if (href) {
        innerElement = makeElement({
          tagName: "a",
          editable: false,
          attributes: {
            href,
            tabindex: -1
          }
        });
        figure.appendChild(innerElement);
      }
      if (this.attachment.hasContent()) {
        HTMLSanitizer.setHTML(innerElement, this.attachment.getContent());
      } else {
        this.createContentNodes().forEach(node => {
          innerElement.appendChild(node);
        });
      }
      innerElement.appendChild(this.createCaptionElement());
      if (this.attachment.isPending()) {
        this.progressElement = makeElement({
          tagName: "progress",
          attributes: {
            class: css$2.attachmentProgress,
            value: this.attachment.getUploadProgress(),
            max: 100
          },
          data: {
            trixMutable: true,
            trixStoreKey: ["progressElement", this.attachment.id].join("/")
          }
        });
        figure.appendChild(this.progressElement);
      }
      return [createCursorTarget("left"), figure, createCursorTarget("right")];
    }
    createCaptionElement() {
      const figcaption = makeElement({
        tagName: "figcaption",
        className: css$2.attachmentCaption
      });
      const caption = this.attachmentPiece.getCaption();
      if (caption) {
        figcaption.classList.add("".concat(css$2.attachmentCaption, "--edited"));
        figcaption.textContent = caption;
      } else {
        let name, size;
        const captionConfig = this.getCaptionConfig();
        if (captionConfig.name) {
          name = this.attachment.getFilename();
        }
        if (captionConfig.size) {
          size = this.attachment.getFormattedFilesize();
        }
        if (name) {
          const nameElement = makeElement({
            tagName: "span",
            className: css$2.attachmentName,
            textContent: name
          });
          figcaption.appendChild(nameElement);
        }
        if (size) {
          if (name) {
            figcaption.appendChild(document.createTextNode(" "));
          }
          const sizeElement = makeElement({
            tagName: "span",
            className: css$2.attachmentSize,
            textContent: size
          });
          figcaption.appendChild(sizeElement);
        }
      }
      return figcaption;
    }
    getClassName() {
      const names = [css$2.attachment, "".concat(css$2.attachment, "--").concat(this.attachment.getType())];
      const extension = this.attachment.getExtension();
      if (extension) {
        names.push("".concat(css$2.attachment, "--").concat(extension));
      }
      return names.join(" ");
    }
    getData() {
      const data = {
        trixAttachment: JSON.stringify(this.attachment),
        trixContentType: this.attachment.getContentType(),
        trixId: this.attachment.id
      };
      const {
        attributes
      } = this.attachmentPiece;
      if (!attributes.isEmpty()) {
        data.trixAttributes = JSON.stringify(attributes);
      }
      if (this.attachment.isPending()) {
        data.trixSerialize = false;
      }
      return data;
    }
    getHref() {
      if (!htmlContainsTagName(this.attachment.getContent(), "a")) {
        return this.attachment.getHref();
      }
    }
    getCaptionConfig() {
      var _config$attachments$t;
      const type = this.attachment.getType();
      const captionConfig = copyObject((_config$attachments$t = attachments[type]) === null || _config$attachments$t === void 0 ? void 0 : _config$attachments$t.caption);
      if (type === "file") {
        captionConfig.name = true;
      }
      return captionConfig;
    }
    findProgressElement() {
      var _this$findElement;
      return (_this$findElement = this.findElement()) === null || _this$findElement === void 0 ? void 0 : _this$findElement.querySelector("progress");
    }

    // Attachment delegate

    attachmentDidChangeUploadProgress() {
      const value = this.attachment.getUploadProgress();
      const progressElement = this.findProgressElement();
      if (progressElement) {
        progressElement.value = value;
      }
    }
  }
  const createCursorTarget = name => makeElement({
    tagName: "span",
    textContent: ZERO_WIDTH_SPACE,
    data: {
      trixCursorTarget: name,
      trixSerialize: false
    }
  });
  const htmlContainsTagName = function (html, tagName) {
    const div = makeElement("div");
    HTMLSanitizer.setHTML(div, html || "");
    return div.querySelector(tagName);
  };

  class PreviewableAttachmentView extends AttachmentView {
    constructor() {
      super(...arguments);
      this.attachment.previewDelegate = this;
    }
    createContentNodes() {
      this.image = makeElement({
        tagName: "img",
        attributes: {
          src: ""
        },
        data: {
          trixMutable: true
        }
      });
      this.refresh(this.image);
      return [this.image];
    }
    createCaptionElement() {
      const figcaption = super.createCaptionElement(...arguments);
      if (!figcaption.textContent) {
        figcaption.setAttribute("data-trix-placeholder", lang$1.captionPlaceholder);
      }
      return figcaption;
    }
    refresh(image) {
      if (!image) {
        var _this$findElement;
        image = (_this$findElement = this.findElement()) === null || _this$findElement === void 0 ? void 0 : _this$findElement.querySelector("img");
      }
      if (image) {
        return this.updateAttributesForImage(image);
      }
    }
    updateAttributesForImage(image) {
      const url = this.attachment.getURL();
      const previewURL = this.attachment.getPreviewURL();
      image.src = previewURL || url;
      if (previewURL === url) {
        image.removeAttribute("data-trix-serialized-attributes");
      } else {
        const serializedAttributes = JSON.stringify({
          src: url
        });
        image.setAttribute("data-trix-serialized-attributes", serializedAttributes);
      }
      const width = this.attachment.getWidth();
      const height = this.attachment.getHeight();
      if (width != null) {
        image.width = width;
      }
      if (height != null) {
        image.height = height;
      }
      const storeKey = ["imageElement", this.attachment.id, image.src, image.width, image.height].join("/");
      image.dataset.trixStoreKey = storeKey;
    }

    // Attachment delegate

    attachmentDidChangeAttributes() {
      this.refresh(this.image);
      return this.refresh();
    }
  }

  /* eslint-disable
      no-useless-escape,
      no-var,
  */
  class PieceView extends ObjectView {
    constructor() {
      super(...arguments);
      this.piece = this.object;
      this.attributes = this.piece.getAttributes();
      this.textConfig = this.options.textConfig;
      this.context = this.options.context;
      if (this.piece.attachment) {
        this.attachment = this.piece.attachment;
      } else {
        this.string = this.piece.toString();
      }
    }
    createNodes() {
      let nodes = this.attachment ? this.createAttachmentNodes() : this.createStringNodes();
      const element = this.createElement();
      if (element) {
        const innerElement = findInnerElement(element);
        Array.from(nodes).forEach(node => {
          innerElement.appendChild(node);
        });
        nodes = [element];
      }
      return nodes;
    }
    createAttachmentNodes() {
      const constructor = this.attachment.isPreviewable() ? PreviewableAttachmentView : AttachmentView;
      const view = this.createChildView(constructor, this.piece.attachment, {
        piece: this.piece
      });
      return view.getNodes();
    }
    createStringNodes() {
      var _this$textConfig;
      if ((_this$textConfig = this.textConfig) !== null && _this$textConfig !== void 0 && _this$textConfig.plaintext) {
        return [document.createTextNode(this.string)];
      } else {
        const nodes = [];
        const iterable = this.string.split("\n");
        for (let index = 0; index < iterable.length; index++) {
          const substring = iterable[index];
          if (index > 0) {
            const element = makeElement("br");
            nodes.push(element);
          }
          if (substring.length) {
            const node = document.createTextNode(this.preserveSpaces(substring));
            nodes.push(node);
          }
        }
        return nodes;
      }
    }
    createElement() {
      let element, key, value;
      const styles = {};
      for (key in this.attributes) {
        value = this.attributes[key];
        const config = getTextConfig(key);
        if (config) {
          if (config.tagName) {
            var innerElement;
            const pendingElement = makeElement(config.tagName);
            if (innerElement) {
              innerElement.appendChild(pendingElement);
              innerElement = pendingElement;
            } else {
              element = innerElement = pendingElement;
            }
          }
          if (config.styleProperty) {
            styles[config.styleProperty] = value;
          }
          if (config.style) {
            for (key in config.style) {
              value = config.style[key];
              styles[key] = value;
            }
          }
        }
      }
      if (Object.keys(styles).length) {
        if (!element) {
          element = makeElement("span");
        }
        for (key in styles) {
          value = styles[key];
          element.style[key] = value;
        }
      }
      return element;
    }
    createContainerElement() {
      for (const key in this.attributes) {
        const value = this.attributes[key];
        const config = getTextConfig(key);
        if (config) {
          if (config.groupTagName) {
            const attributes = {};
            attributes[key] = value;
            return makeElement(config.groupTagName, attributes);
          }
        }
      }
    }
    preserveSpaces(string) {
      if (this.context.isLast) {
        string = string.replace(/\ $/, NON_BREAKING_SPACE);
      }
      string = string.replace(/(\S)\ {3}(\S)/g, "$1 ".concat(NON_BREAKING_SPACE, " $2")).replace(/\ {2}/g, "".concat(NON_BREAKING_SPACE, " ")).replace(/\ {2}/g, " ".concat(NON_BREAKING_SPACE));
      if (this.context.isFirst || this.context.followsWhitespace) {
        string = string.replace(/^\ /, NON_BREAKING_SPACE);
      }
      return string;
    }
  }

  /* eslint-disable
      no-var,
  */
  class TextView extends ObjectView {
    constructor() {
      super(...arguments);
      this.text = this.object;
      this.textConfig = this.options.textConfig;
    }
    createNodes() {
      const nodes = [];
      const pieces = ObjectGroup.groupObjects(this.getPieces());
      const lastIndex = pieces.length - 1;
      for (let index = 0; index < pieces.length; index++) {
        const piece = pieces[index];
        const context = {};
        if (index === 0) {
          context.isFirst = true;
        }
        if (index === lastIndex) {
          context.isLast = true;
        }
        if (endsWithWhitespace(previousPiece)) {
          context.followsWhitespace = true;
        }
        const view = this.findOrCreateCachedChildView(PieceView, piece, {
          textConfig: this.textConfig,
          context
        });
        nodes.push(...Array.from(view.getNodes() || []));
        var previousPiece = piece;
      }
      return nodes;
    }
    getPieces() {
      return Array.from(this.text.getPieces()).filter(piece => !piece.hasAttribute("blockBreak"));
    }
  }
  const endsWithWhitespace = piece => /\s$/.test(piece === null || piece === void 0 ? void 0 : piece.toString());

  const {
    css: css$1
  } = config;
  class BlockView extends ObjectView {
    constructor() {
      super(...arguments);
      this.block = this.object;
      this.attributes = this.block.getAttributes();
    }
    createNodes() {
      const comment = document.createComment("block");
      const nodes = [comment];
      if (this.block.isEmpty()) {
        nodes.push(makeElement("br"));
      } else {
        var _getBlockConfig;
        const textConfig = (_getBlockConfig = getBlockConfig(this.block.getLastAttribute())) === null || _getBlockConfig === void 0 ? void 0 : _getBlockConfig.text;
        const textView = this.findOrCreateCachedChildView(TextView, this.block.text, {
          textConfig
        });
        nodes.push(...Array.from(textView.getNodes() || []));
        if (this.shouldAddExtraNewlineElement()) {
          nodes.push(makeElement("br"));
        }
      }
      if (this.attributes.length) {
        return nodes;
      } else {
        let attributes$1;
        const {
          tagName
        } = attributes.default;
        if (this.block.isRTL()) {
          attributes$1 = {
            dir: "rtl"
          };
        }
        const element = makeElement({
          tagName,
          attributes: attributes$1
        });
        nodes.forEach(node => element.appendChild(node));
        return [element];
      }
    }
    createContainerElement(depth) {
      const attributes = {};
      let className;
      const attributeName = this.attributes[depth];
      const {
        tagName,
        htmlAttributes = []
      } = getBlockConfig(attributeName);
      if (depth === 0 && this.block.isRTL()) {
        Object.assign(attributes, {
          dir: "rtl"
        });
      }
      if (attributeName === "attachmentGallery") {
        const size = this.block.getBlockBreakPosition();
        className = "".concat(css$1.attachmentGallery, " ").concat(css$1.attachmentGallery, "--").concat(size);
      }
      Object.entries(this.block.htmlAttributes).forEach(_ref => {
        let [name, value] = _ref;
        if (htmlAttributes.includes(name)) {
          attributes[name] = value;
        }
      });
      return makeElement({
        tagName,
        className,
        attributes
      });
    }

    // A single <br> at the end of a block element has no visual representation
    // so add an extra one.
    shouldAddExtraNewlineElement() {
      return /\n\n$/.test(this.block.toString());
    }
  }

  class DocumentView extends ObjectView {
    static render(document) {
      const element = makeElement("div");
      const view = new this(document, {
        element
      });
      view.render();
      view.sync();
      return element;
    }
    constructor() {
      super(...arguments);
      this.element = this.options.element;
      this.elementStore = new ElementStore();
      this.setDocument(this.object);
    }
    setDocument(document) {
      if (!document.isEqualTo(this.document)) {
        this.document = this.object = document;
      }
    }
    render() {
      this.childViews = [];
      this.shadowElement = makeElement("div");
      if (!this.document.isEmpty()) {
        const objects = ObjectGroup.groupObjects(this.document.getBlocks(), {
          asTree: true
        });
        Array.from(objects).forEach(object => {
          const view = this.findOrCreateCachedChildView(BlockView, object);
          Array.from(view.getNodes()).map(node => this.shadowElement.appendChild(node));
        });
      }
    }
    isSynced() {
      return elementsHaveEqualHTML(this.shadowElement, this.element);
    }
    sync() {
      const fragment = this.createDocumentFragmentForSync();
      while (this.element.lastChild) {
        this.element.removeChild(this.element.lastChild);
      }
      this.element.appendChild(fragment);
      return this.didSync();
    }

    // Private

    didSync() {
      this.elementStore.reset(findStoredElements(this.element));
      return defer(() => this.garbageCollectCachedViews());
    }
    createDocumentFragmentForSync() {
      const fragment = document.createDocumentFragment();
      Array.from(this.shadowElement.childNodes).forEach(node => {
        fragment.appendChild(node.cloneNode(true));
      });
      Array.from(findStoredElements(fragment)).forEach(element => {
        const storedElement = this.elementStore.remove(element);
        if (storedElement) {
          element.parentNode.replaceChild(storedElement, element);
        }
      });
      return fragment;
    }
  }
  const findStoredElements = element => element.querySelectorAll("[data-trix-store-key]");
  const elementsHaveEqualHTML = (element, otherElement) => ignoreSpaces(element.innerHTML) === ignoreSpaces(otherElement.innerHTML);
  const ignoreSpaces = html => html.replace(/&nbsp;/g, " ");

  function _AsyncGenerator(e) {
    var r, t;
    function resume(r, t) {
      try {
        var n = e[r](t),
          o = n.value,
          u = o instanceof _OverloadYield;
        Promise.resolve(u ? o.v : o).then(function (t) {
          if (u) {
            var i = "return" === r ? "return" : "next";
            if (!o.k || t.done) return resume(i, t);
            t = e[i](t).value;
          }
          settle(n.done ? "return" : "normal", t);
        }, function (e) {
          resume("throw", e);
        });
      } catch (e) {
        settle("throw", e);
      }
    }
    function settle(e, n) {
      switch (e) {
        case "return":
          r.resolve({
            value: n,
            done: !0
          });
          break;
        case "throw":
          r.reject(n);
          break;
        default:
          r.resolve({
            value: n,
            done: !1
          });
      }
      (r = r.next) ? resume(r.key, r.arg) : t = null;
    }
    this._invoke = function (e, n) {
      return new Promise(function (o, u) {
        var i = {
          key: e,
          arg: n,
          resolve: o,
          reject: u,
          next: null
        };
        t ? t = t.next = i : (r = t = i, resume(e, n));
      });
    }, "function" != typeof e.return && (this.return = void 0);
  }
  _AsyncGenerator.prototype["function" == typeof Symbol && Symbol.asyncIterator || "@@asyncIterator"] = function () {
    return this;
  }, _AsyncGenerator.prototype.next = function (e) {
    return this._invoke("next", e);
  }, _AsyncGenerator.prototype.throw = function (e) {
    return this._invoke("throw", e);
  }, _AsyncGenerator.prototype.return = function (e) {
    return this._invoke("return", e);
  };
  function _OverloadYield(t, e) {
    this.v = t, this.k = e;
  }
  function old_createMetadataMethodsForProperty(e, t, a, r) {
    return {
      getMetadata: function (o) {
        old_assertNotFinished(r, "getMetadata"), old_assertMetadataKey(o);
        var i = e[o];
        if (void 0 !== i) if (1 === t) {
          var n = i.public;
          if (void 0 !== n) return n[a];
        } else if (2 === t) {
          var l = i.private;
          if (void 0 !== l) return l.get(a);
        } else if (Object.hasOwnProperty.call(i, "constructor")) return i.constructor;
      },
      setMetadata: function (o, i) {
        old_assertNotFinished(r, "setMetadata"), old_assertMetadataKey(o);
        var n = e[o];
        if (void 0 === n && (n = e[o] = {}), 1 === t) {
          var l = n.public;
          void 0 === l && (l = n.public = {}), l[a] = i;
        } else if (2 === t) {
          var s = n.priv;
          void 0 === s && (s = n.private = new Map()), s.set(a, i);
        } else n.constructor = i;
      }
    };
  }
  function old_convertMetadataMapToFinal(e, t) {
    var a = e[Symbol.metadata || Symbol.for("Symbol.metadata")],
      r = Object.getOwnPropertySymbols(t);
    if (0 !== r.length) {
      for (var o = 0; o < r.length; o++) {
        var i = r[o],
          n = t[i],
          l = a ? a[i] : null,
          s = n.public,
          c = l ? l.public : null;
        s && c && Object.setPrototypeOf(s, c);
        var d = n.private;
        if (d) {
          var u = Array.from(d.values()),
            f = l ? l.private : null;
          f && (u = u.concat(f)), n.private = u;
        }
        l && Object.setPrototypeOf(n, l);
      }
      a && Object.setPrototypeOf(t, a), e[Symbol.metadata || Symbol.for("Symbol.metadata")] = t;
    }
  }
  function old_createAddInitializerMethod(e, t) {
    return function (a) {
      old_assertNotFinished(t, "addInitializer"), old_assertCallable(a, "An initializer"), e.push(a);
    };
  }
  function old_memberDec(e, t, a, r, o, i, n, l, s) {
    var c;
    switch (i) {
      case 1:
        c = "accessor";
        break;
      case 2:
        c = "method";
        break;
      case 3:
        c = "getter";
        break;
      case 4:
        c = "setter";
        break;
      default:
        c = "field";
    }
    var d,
      u,
      f = {
        kind: c,
        name: l ? "#" + t : t,
        isStatic: n,
        isPrivate: l
      },
      p = {
        v: !1
      };
    if (0 !== i && (f.addInitializer = old_createAddInitializerMethod(o, p)), l) {
      d = 2, u = Symbol(t);
      var v = {};
      0 === i ? (v.get = a.get, v.set = a.set) : 2 === i ? v.get = function () {
        return a.value;
      } : (1 !== i && 3 !== i || (v.get = function () {
        return a.get.call(this);
      }), 1 !== i && 4 !== i || (v.set = function (e) {
        a.set.call(this, e);
      })), f.access = v;
    } else d = 1, u = t;
    try {
      return e(s, Object.assign(f, old_createMetadataMethodsForProperty(r, d, u, p)));
    } finally {
      p.v = !0;
    }
  }
  function old_assertNotFinished(e, t) {
    if (e.v) throw new Error("attempted to call " + t + " after decoration was finished");
  }
  function old_assertMetadataKey(e) {
    if ("symbol" != typeof e) throw new TypeError("Metadata keys must be symbols, received: " + e);
  }
  function old_assertCallable(e, t) {
    if ("function" != typeof e) throw new TypeError(t + " must be a function");
  }
  function old_assertValidReturnValue(e, t) {
    var a = typeof t;
    if (1 === e) {
      if ("object" !== a || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
      void 0 !== t.get && old_assertCallable(t.get, "accessor.get"), void 0 !== t.set && old_assertCallable(t.set, "accessor.set"), void 0 !== t.init && old_assertCallable(t.init, "accessor.init"), void 0 !== t.initializer && old_assertCallable(t.initializer, "accessor.initializer");
    } else if ("function" !== a) {
      var r;
      throw r = 0 === e ? "field" : 10 === e ? "class" : "method", new TypeError(r + " decorators must return a function or void 0");
    }
  }
  function old_getInit(e) {
    var t;
    return null == (t = e.init) && (t = e.initializer) && "undefined" != typeof console && console.warn(".initializer has been renamed to .init as of March 2022"), t;
  }
  function old_applyMemberDec(e, t, a, r, o, i, n, l, s) {
    var c,
      d,
      u,
      f,
      p,
      v,
      h = a[0];
    if (n ? c = 0 === o || 1 === o ? {
      get: a[3],
      set: a[4]
    } : 3 === o ? {
      get: a[3]
    } : 4 === o ? {
      set: a[3]
    } : {
      value: a[3]
    } : 0 !== o && (c = Object.getOwnPropertyDescriptor(t, r)), 1 === o ? u = {
      get: c.get,
      set: c.set
    } : 2 === o ? u = c.value : 3 === o ? u = c.get : 4 === o && (u = c.set), "function" == typeof h) void 0 !== (f = old_memberDec(h, r, c, l, s, o, i, n, u)) && (old_assertValidReturnValue(o, f), 0 === o ? d = f : 1 === o ? (d = old_getInit(f), p = f.get || u.get, v = f.set || u.set, u = {
      get: p,
      set: v
    }) : u = f);else for (var y = h.length - 1; y >= 0; y--) {
      var b;
      if (void 0 !== (f = old_memberDec(h[y], r, c, l, s, o, i, n, u))) old_assertValidReturnValue(o, f), 0 === o ? b = f : 1 === o ? (b = old_getInit(f), p = f.get || u.get, v = f.set || u.set, u = {
        get: p,
        set: v
      }) : u = f, void 0 !== b && (void 0 === d ? d = b : "function" == typeof d ? d = [d, b] : d.push(b));
    }
    if (0 === o || 1 === o) {
      if (void 0 === d) d = function (e, t) {
        return t;
      };else if ("function" != typeof d) {
        var g = d;
        d = function (e, t) {
          for (var a = t, r = 0; r < g.length; r++) a = g[r].call(e, a);
          return a;
        };
      } else {
        var m = d;
        d = function (e, t) {
          return m.call(e, t);
        };
      }
      e.push(d);
    }
    0 !== o && (1 === o ? (c.get = u.get, c.set = u.set) : 2 === o ? c.value = u : 3 === o ? c.get = u : 4 === o && (c.set = u), n ? 1 === o ? (e.push(function (e, t) {
      return u.get.call(e, t);
    }), e.push(function (e, t) {
      return u.set.call(e, t);
    })) : 2 === o ? e.push(u) : e.push(function (e, t) {
      return u.call(e, t);
    }) : Object.defineProperty(t, r, c));
  }
  function old_applyMemberDecs(e, t, a, r, o) {
    for (var i, n, l = new Map(), s = new Map(), c = 0; c < o.length; c++) {
      var d = o[c];
      if (Array.isArray(d)) {
        var u,
          f,
          p,
          v = d[1],
          h = d[2],
          y = d.length > 3,
          b = v >= 5;
        if (b ? (u = t, f = r, 0 !== (v -= 5) && (p = n = n || [])) : (u = t.prototype, f = a, 0 !== v && (p = i = i || [])), 0 !== v && !y) {
          var g = b ? s : l,
            m = g.get(h) || 0;
          if (!0 === m || 3 === m && 4 !== v || 4 === m && 3 !== v) throw new Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
          !m && v > 2 ? g.set(h, v) : g.set(h, !0);
        }
        old_applyMemberDec(e, u, d, h, v, b, y, f, p);
      }
    }
    old_pushInitializers(e, i), old_pushInitializers(e, n);
  }
  function old_pushInitializers(e, t) {
    t && e.push(function (e) {
      for (var a = 0; a < t.length; a++) t[a].call(e);
      return e;
    });
  }
  function old_applyClassDecs(e, t, a, r) {
    if (r.length > 0) {
      for (var o = [], i = t, n = t.name, l = r.length - 1; l >= 0; l--) {
        var s = {
          v: !1
        };
        try {
          var c = Object.assign({
              kind: "class",
              name: n,
              addInitializer: old_createAddInitializerMethod(o, s)
            }, old_createMetadataMethodsForProperty(a, 0, n, s)),
            d = r[l](i, c);
        } finally {
          s.v = !0;
        }
        void 0 !== d && (old_assertValidReturnValue(10, d), i = d);
      }
      e.push(i, function () {
        for (var e = 0; e < o.length; e++) o[e].call(i);
      });
    }
  }
  function _applyDecs(e, t, a) {
    var r = [],
      o = {},
      i = {};
    return old_applyMemberDecs(r, e, i, o, t), old_convertMetadataMapToFinal(e.prototype, i), old_applyClassDecs(r, e, o, a), old_convertMetadataMapToFinal(e, o), r;
  }
  function applyDecs2203Factory() {
    function createAddInitializerMethod(e, t) {
      return function (r) {
        !function (e, t) {
          if (e.v) throw new Error("attempted to call " + t + " after decoration was finished");
        }(t, "addInitializer"), assertCallable(r, "An initializer"), e.push(r);
      };
    }
    function memberDec(e, t, r, a, n, i, s, o) {
      var c;
      switch (n) {
        case 1:
          c = "accessor";
          break;
        case 2:
          c = "method";
          break;
        case 3:
          c = "getter";
          break;
        case 4:
          c = "setter";
          break;
        default:
          c = "field";
      }
      var l,
        u,
        f = {
          kind: c,
          name: s ? "#" + t : t,
          static: i,
          private: s
        },
        p = {
          v: !1
        };
      0 !== n && (f.addInitializer = createAddInitializerMethod(a, p)), 0 === n ? s ? (l = r.get, u = r.set) : (l = function () {
        return this[t];
      }, u = function (e) {
        this[t] = e;
      }) : 2 === n ? l = function () {
        return r.value;
      } : (1 !== n && 3 !== n || (l = function () {
        return r.get.call(this);
      }), 1 !== n && 4 !== n || (u = function (e) {
        r.set.call(this, e);
      })), f.access = l && u ? {
        get: l,
        set: u
      } : l ? {
        get: l
      } : {
        set: u
      };
      try {
        return e(o, f);
      } finally {
        p.v = !0;
      }
    }
    function assertCallable(e, t) {
      if ("function" != typeof e) throw new TypeError(t + " must be a function");
    }
    function assertValidReturnValue(e, t) {
      var r = typeof t;
      if (1 === e) {
        if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
        void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
      } else if ("function" !== r) {
        var a;
        throw a = 0 === e ? "field" : 10 === e ? "class" : "method", new TypeError(a + " decorators must return a function or void 0");
      }
    }
    function applyMemberDec(e, t, r, a, n, i, s, o) {
      var c,
        l,
        u,
        f,
        p,
        d,
        h = r[0];
      if (s ? c = 0 === n || 1 === n ? {
        get: r[3],
        set: r[4]
      } : 3 === n ? {
        get: r[3]
      } : 4 === n ? {
        set: r[3]
      } : {
        value: r[3]
      } : 0 !== n && (c = Object.getOwnPropertyDescriptor(t, a)), 1 === n ? u = {
        get: c.get,
        set: c.set
      } : 2 === n ? u = c.value : 3 === n ? u = c.get : 4 === n && (u = c.set), "function" == typeof h) void 0 !== (f = memberDec(h, a, c, o, n, i, s, u)) && (assertValidReturnValue(n, f), 0 === n ? l = f : 1 === n ? (l = f.init, p = f.get || u.get, d = f.set || u.set, u = {
        get: p,
        set: d
      }) : u = f);else for (var v = h.length - 1; v >= 0; v--) {
        var g;
        if (void 0 !== (f = memberDec(h[v], a, c, o, n, i, s, u))) assertValidReturnValue(n, f), 0 === n ? g = f : 1 === n ? (g = f.init, p = f.get || u.get, d = f.set || u.set, u = {
          get: p,
          set: d
        }) : u = f, void 0 !== g && (void 0 === l ? l = g : "function" == typeof l ? l = [l, g] : l.push(g));
      }
      if (0 === n || 1 === n) {
        if (void 0 === l) l = function (e, t) {
          return t;
        };else if ("function" != typeof l) {
          var y = l;
          l = function (e, t) {
            for (var r = t, a = 0; a < y.length; a++) r = y[a].call(e, r);
            return r;
          };
        } else {
          var m = l;
          l = function (e, t) {
            return m.call(e, t);
          };
        }
        e.push(l);
      }
      0 !== n && (1 === n ? (c.get = u.get, c.set = u.set) : 2 === n ? c.value = u : 3 === n ? c.get = u : 4 === n && (c.set = u), s ? 1 === n ? (e.push(function (e, t) {
        return u.get.call(e, t);
      }), e.push(function (e, t) {
        return u.set.call(e, t);
      })) : 2 === n ? e.push(u) : e.push(function (e, t) {
        return u.call(e, t);
      }) : Object.defineProperty(t, a, c));
    }
    function pushInitializers(e, t) {
      t && e.push(function (e) {
        for (var r = 0; r < t.length; r++) t[r].call(e);
        return e;
      });
    }
    return function (e, t, r) {
      var a = [];
      return function (e, t, r) {
        for (var a, n, i = new Map(), s = new Map(), o = 0; o < r.length; o++) {
          var c = r[o];
          if (Array.isArray(c)) {
            var l,
              u,
              f = c[1],
              p = c[2],
              d = c.length > 3,
              h = f >= 5;
            if (h ? (l = t, 0 != (f -= 5) && (u = n = n || [])) : (l = t.prototype, 0 !== f && (u = a = a || [])), 0 !== f && !d) {
              var v = h ? s : i,
                g = v.get(p) || 0;
              if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw new Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
              !g && f > 2 ? v.set(p, f) : v.set(p, !0);
            }
            applyMemberDec(e, l, c, p, f, h, d, u);
          }
        }
        pushInitializers(e, a), pushInitializers(e, n);
      }(a, e, t), function (e, t, r) {
        if (r.length > 0) {
          for (var a = [], n = t, i = t.name, s = r.length - 1; s >= 0; s--) {
            var o = {
              v: !1
            };
            try {
              var c = r[s](n, {
                kind: "class",
                name: i,
                addInitializer: createAddInitializerMethod(a, o)
              });
            } finally {
              o.v = !0;
            }
            void 0 !== c && (assertValidReturnValue(10, c), n = c);
          }
          e.push(n, function () {
            for (var e = 0; e < a.length; e++) a[e].call(n);
          });
        }
      }(a, e, r), a;
    };
  }
  var applyDecs2203Impl;
  function _applyDecs2203(e, t, r) {
    return (applyDecs2203Impl = applyDecs2203Impl || applyDecs2203Factory())(e, t, r);
  }
  function applyDecs2203RFactory() {
    function createAddInitializerMethod(e, t) {
      return function (r) {
        !function (e, t) {
          if (e.v) throw new Error("attempted to call " + t + " after decoration was finished");
        }(t, "addInitializer"), assertCallable(r, "An initializer"), e.push(r);
      };
    }
    function memberDec(e, t, r, n, a, i, s, o) {
      var c;
      switch (a) {
        case 1:
          c = "accessor";
          break;
        case 2:
          c = "method";
          break;
        case 3:
          c = "getter";
          break;
        case 4:
          c = "setter";
          break;
        default:
          c = "field";
      }
      var l,
        u,
        f = {
          kind: c,
          name: s ? "#" + t : t,
          static: i,
          private: s
        },
        p = {
          v: !1
        };
      0 !== a && (f.addInitializer = createAddInitializerMethod(n, p)), 0 === a ? s ? (l = r.get, u = r.set) : (l = function () {
        return this[t];
      }, u = function (e) {
        this[t] = e;
      }) : 2 === a ? l = function () {
        return r.value;
      } : (1 !== a && 3 !== a || (l = function () {
        return r.get.call(this);
      }), 1 !== a && 4 !== a || (u = function (e) {
        r.set.call(this, e);
      })), f.access = l && u ? {
        get: l,
        set: u
      } : l ? {
        get: l
      } : {
        set: u
      };
      try {
        return e(o, f);
      } finally {
        p.v = !0;
      }
    }
    function assertCallable(e, t) {
      if ("function" != typeof e) throw new TypeError(t + " must be a function");
    }
    function assertValidReturnValue(e, t) {
      var r = typeof t;
      if (1 === e) {
        if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
        void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
      } else if ("function" !== r) {
        var n;
        throw n = 0 === e ? "field" : 10 === e ? "class" : "method", new TypeError(n + " decorators must return a function or void 0");
      }
    }
    function applyMemberDec(e, t, r, n, a, i, s, o) {
      var c,
        l,
        u,
        f,
        p,
        d,
        h = r[0];
      if (s ? c = 0 === a || 1 === a ? {
        get: r[3],
        set: r[4]
      } : 3 === a ? {
        get: r[3]
      } : 4 === a ? {
        set: r[3]
      } : {
        value: r[3]
      } : 0 !== a && (c = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? u = {
        get: c.get,
        set: c.set
      } : 2 === a ? u = c.value : 3 === a ? u = c.get : 4 === a && (u = c.set), "function" == typeof h) void 0 !== (f = memberDec(h, n, c, o, a, i, s, u)) && (assertValidReturnValue(a, f), 0 === a ? l = f : 1 === a ? (l = f.init, p = f.get || u.get, d = f.set || u.set, u = {
        get: p,
        set: d
      }) : u = f);else for (var v = h.length - 1; v >= 0; v--) {
        var g;
        if (void 0 !== (f = memberDec(h[v], n, c, o, a, i, s, u))) assertValidReturnValue(a, f), 0 === a ? g = f : 1 === a ? (g = f.init, p = f.get || u.get, d = f.set || u.set, u = {
          get: p,
          set: d
        }) : u = f, void 0 !== g && (void 0 === l ? l = g : "function" == typeof l ? l = [l, g] : l.push(g));
      }
      if (0 === a || 1 === a) {
        if (void 0 === l) l = function (e, t) {
          return t;
        };else if ("function" != typeof l) {
          var y = l;
          l = function (e, t) {
            for (var r = t, n = 0; n < y.length; n++) r = y[n].call(e, r);
            return r;
          };
        } else {
          var m = l;
          l = function (e, t) {
            return m.call(e, t);
          };
        }
        e.push(l);
      }
      0 !== a && (1 === a ? (c.get = u.get, c.set = u.set) : 2 === a ? c.value = u : 3 === a ? c.get = u : 4 === a && (c.set = u), s ? 1 === a ? (e.push(function (e, t) {
        return u.get.call(e, t);
      }), e.push(function (e, t) {
        return u.set.call(e, t);
      })) : 2 === a ? e.push(u) : e.push(function (e, t) {
        return u.call(e, t);
      }) : Object.defineProperty(t, n, c));
    }
    function applyMemberDecs(e, t) {
      for (var r, n, a = [], i = new Map(), s = new Map(), o = 0; o < t.length; o++) {
        var c = t[o];
        if (Array.isArray(c)) {
          var l,
            u,
            f = c[1],
            p = c[2],
            d = c.length > 3,
            h = f >= 5;
          if (h ? (l = e, 0 !== (f -= 5) && (u = n = n || [])) : (l = e.prototype, 0 !== f && (u = r = r || [])), 0 !== f && !d) {
            var v = h ? s : i,
              g = v.get(p) || 0;
            if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw new Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
            !g && f > 2 ? v.set(p, f) : v.set(p, !0);
          }
          applyMemberDec(a, l, c, p, f, h, d, u);
        }
      }
      return pushInitializers(a, r), pushInitializers(a, n), a;
    }
    function pushInitializers(e, t) {
      t && e.push(function (e) {
        for (var r = 0; r < t.length; r++) t[r].call(e);
        return e;
      });
    }
    return function (e, t, r) {
      return {
        e: applyMemberDecs(e, t),
        get c() {
          return function (e, t) {
            if (t.length > 0) {
              for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
                var s = {
                  v: !1
                };
                try {
                  var o = t[i](n, {
                    kind: "class",
                    name: a,
                    addInitializer: createAddInitializerMethod(r, s)
                  });
                } finally {
                  s.v = !0;
                }
                void 0 !== o && (assertValidReturnValue(10, o), n = o);
              }
              return [n, function () {
                for (var e = 0; e < r.length; e++) r[e].call(n);
              }];
            }
          }(e, r);
        }
      };
    };
  }
  function _applyDecs2203R(e, t, r) {
    return (_applyDecs2203R = applyDecs2203RFactory())(e, t, r);
  }
  function applyDecs2301Factory() {
    function createAddInitializerMethod(e, t) {
      return function (r) {
        !function (e, t) {
          if (e.v) throw new Error("attempted to call " + t + " after decoration was finished");
        }(t, "addInitializer"), assertCallable(r, "An initializer"), e.push(r);
      };
    }
    function assertInstanceIfPrivate(e, t) {
      if (!e(t)) throw new TypeError("Attempted to access private element on non-instance");
    }
    function memberDec(e, t, r, n, a, i, s, o, c) {
      var u;
      switch (a) {
        case 1:
          u = "accessor";
          break;
        case 2:
          u = "method";
          break;
        case 3:
          u = "getter";
          break;
        case 4:
          u = "setter";
          break;
        default:
          u = "field";
      }
      var l,
        f,
        p = {
          kind: u,
          name: s ? "#" + t : t,
          static: i,
          private: s
        },
        d = {
          v: !1
        };
      if (0 !== a && (p.addInitializer = createAddInitializerMethod(n, d)), s || 0 !== a && 2 !== a) {
        if (2 === a) l = function (e) {
          return assertInstanceIfPrivate(c, e), r.value;
        };else {
          var h = 0 === a || 1 === a;
          (h || 3 === a) && (l = s ? function (e) {
            return assertInstanceIfPrivate(c, e), r.get.call(e);
          } : function (e) {
            return r.get.call(e);
          }), (h || 4 === a) && (f = s ? function (e, t) {
            assertInstanceIfPrivate(c, e), r.set.call(e, t);
          } : function (e, t) {
            r.set.call(e, t);
          });
        }
      } else l = function (e) {
        return e[t];
      }, 0 === a && (f = function (e, r) {
        e[t] = r;
      });
      var v = s ? c.bind() : function (e) {
        return t in e;
      };
      p.access = l && f ? {
        get: l,
        set: f,
        has: v
      } : l ? {
        get: l,
        has: v
      } : {
        set: f,
        has: v
      };
      try {
        return e(o, p);
      } finally {
        d.v = !0;
      }
    }
    function assertCallable(e, t) {
      if ("function" != typeof e) throw new TypeError(t + " must be a function");
    }
    function assertValidReturnValue(e, t) {
      var r = typeof t;
      if (1 === e) {
        if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
        void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
      } else if ("function" !== r) {
        var n;
        throw n = 0 === e ? "field" : 10 === e ? "class" : "method", new TypeError(n + " decorators must return a function or void 0");
      }
    }
    function curryThis2(e) {
      return function (t) {
        e(this, t);
      };
    }
    function applyMemberDec(e, t, r, n, a, i, s, o, c) {
      var u,
        l,
        f,
        p,
        d,
        h,
        v,
        g = r[0];
      if (s ? u = 0 === a || 1 === a ? {
        get: (p = r[3], function () {
          return p(this);
        }),
        set: curryThis2(r[4])
      } : 3 === a ? {
        get: r[3]
      } : 4 === a ? {
        set: r[3]
      } : {
        value: r[3]
      } : 0 !== a && (u = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? f = {
        get: u.get,
        set: u.set
      } : 2 === a ? f = u.value : 3 === a ? f = u.get : 4 === a && (f = u.set), "function" == typeof g) void 0 !== (d = memberDec(g, n, u, o, a, i, s, f, c)) && (assertValidReturnValue(a, d), 0 === a ? l = d : 1 === a ? (l = d.init, h = d.get || f.get, v = d.set || f.set, f = {
        get: h,
        set: v
      }) : f = d);else for (var y = g.length - 1; y >= 0; y--) {
        var m;
        if (void 0 !== (d = memberDec(g[y], n, u, o, a, i, s, f, c))) assertValidReturnValue(a, d), 0 === a ? m = d : 1 === a ? (m = d.init, h = d.get || f.get, v = d.set || f.set, f = {
          get: h,
          set: v
        }) : f = d, void 0 !== m && (void 0 === l ? l = m : "function" == typeof l ? l = [l, m] : l.push(m));
      }
      if (0 === a || 1 === a) {
        if (void 0 === l) l = function (e, t) {
          return t;
        };else if ("function" != typeof l) {
          var b = l;
          l = function (e, t) {
            for (var r = t, n = 0; n < b.length; n++) r = b[n].call(e, r);
            return r;
          };
        } else {
          var I = l;
          l = function (e, t) {
            return I.call(e, t);
          };
        }
        e.push(l);
      }
      0 !== a && (1 === a ? (u.get = f.get, u.set = f.set) : 2 === a ? u.value = f : 3 === a ? u.get = f : 4 === a && (u.set = f), s ? 1 === a ? (e.push(function (e, t) {
        return f.get.call(e, t);
      }), e.push(function (e, t) {
        return f.set.call(e, t);
      })) : 2 === a ? e.push(f) : e.push(function (e, t) {
        return f.call(e, t);
      }) : Object.defineProperty(t, n, u));
    }
    function applyMemberDecs(e, t, r) {
      for (var n, a, i, s = [], o = new Map(), c = new Map(), u = 0; u < t.length; u++) {
        var l = t[u];
        if (Array.isArray(l)) {
          var f,
            p,
            d = l[1],
            h = l[2],
            v = l.length > 3,
            g = d >= 5,
            y = r;
          if (g ? (f = e, 0 !== (d -= 5) && (p = a = a || []), v && !i && (i = function (t) {
            return _checkInRHS(t) === e;
          }), y = i) : (f = e.prototype, 0 !== d && (p = n = n || [])), 0 !== d && !v) {
            var m = g ? c : o,
              b = m.get(h) || 0;
            if (!0 === b || 3 === b && 4 !== d || 4 === b && 3 !== d) throw new Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
            !b && d > 2 ? m.set(h, d) : m.set(h, !0);
          }
          applyMemberDec(s, f, l, h, d, g, v, p, y);
        }
      }
      return pushInitializers(s, n), pushInitializers(s, a), s;
    }
    function pushInitializers(e, t) {
      t && e.push(function (e) {
        for (var r = 0; r < t.length; r++) t[r].call(e);
        return e;
      });
    }
    return function (e, t, r, n) {
      return {
        e: applyMemberDecs(e, t, n),
        get c() {
          return function (e, t) {
            if (t.length > 0) {
              for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
                var s = {
                  v: !1
                };
                try {
                  var o = t[i](n, {
                    kind: "class",
                    name: a,
                    addInitializer: createAddInitializerMethod(r, s)
                  });
                } finally {
                  s.v = !0;
                }
                void 0 !== o && (assertValidReturnValue(10, o), n = o);
              }
              return [n, function () {
                for (var e = 0; e < r.length; e++) r[e].call(n);
              }];
            }
          }(e, r);
        }
      };
    };
  }
  function _applyDecs2301(e, t, r, n) {
    return (_applyDecs2301 = applyDecs2301Factory())(e, t, r, n);
  }
  function createAddInitializerMethod(e, t) {
    return function (r) {
      assertNotFinished(t, "addInitializer"), assertCallable(r, "An initializer"), e.push(r);
    };
  }
  function assertInstanceIfPrivate(e, t) {
    if (!e(t)) throw new TypeError("Attempted to access private element on non-instance");
  }
  function memberDec(e, t, r, a, n, i, s, o, c, l, u) {
    var f;
    switch (i) {
      case 1:
        f = "accessor";
        break;
      case 2:
        f = "method";
        break;
      case 3:
        f = "getter";
        break;
      case 4:
        f = "setter";
        break;
      default:
        f = "field";
    }
    var d,
      p,
      h = {
        kind: f,
        name: o ? "#" + r : r,
        static: s,
        private: o,
        metadata: u
      },
      v = {
        v: !1
      };
    if (0 !== i && (h.addInitializer = createAddInitializerMethod(n, v)), o || 0 !== i && 2 !== i) {
      if (2 === i) d = function (e) {
        return assertInstanceIfPrivate(l, e), a.value;
      };else {
        var y = 0 === i || 1 === i;
        (y || 3 === i) && (d = o ? function (e) {
          return assertInstanceIfPrivate(l, e), a.get.call(e);
        } : function (e) {
          return a.get.call(e);
        }), (y || 4 === i) && (p = o ? function (e, t) {
          assertInstanceIfPrivate(l, e), a.set.call(e, t);
        } : function (e, t) {
          a.set.call(e, t);
        });
      }
    } else d = function (e) {
      return e[r];
    }, 0 === i && (p = function (e, t) {
      e[r] = t;
    });
    var m = o ? l.bind() : function (e) {
      return r in e;
    };
    h.access = d && p ? {
      get: d,
      set: p,
      has: m
    } : d ? {
      get: d,
      has: m
    } : {
      set: p,
      has: m
    };
    try {
      return e.call(t, c, h);
    } finally {
      v.v = !0;
    }
  }
  function assertNotFinished(e, t) {
    if (e.v) throw new Error("attempted to call " + t + " after decoration was finished");
  }
  function assertCallable(e, t) {
    if ("function" != typeof e) throw new TypeError(t + " must be a function");
  }
  function assertValidReturnValue(e, t) {
    var r = typeof t;
    if (1 === e) {
      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
    } else if ("function" !== r) {
      var a;
      throw a = 0 === e ? "field" : 5 === e ? "class" : "method", new TypeError(a + " decorators must return a function or void 0");
    }
  }
  function curryThis1(e) {
    return function () {
      return e(this);
    };
  }
  function curryThis2(e) {
    return function (t) {
      e(this, t);
    };
  }
  function applyMemberDec(e, t, r, a, n, i, s, o, c, l, u) {
    var f,
      d,
      p,
      h,
      v,
      y,
      m = r[0];
    a || Array.isArray(m) || (m = [m]), o ? f = 0 === i || 1 === i ? {
      get: curryThis1(r[3]),
      set: curryThis2(r[4])
    } : 3 === i ? {
      get: r[3]
    } : 4 === i ? {
      set: r[3]
    } : {
      value: r[3]
    } : 0 !== i && (f = Object.getOwnPropertyDescriptor(t, n)), 1 === i ? p = {
      get: f.get,
      set: f.set
    } : 2 === i ? p = f.value : 3 === i ? p = f.get : 4 === i && (p = f.set);
    for (var g = a ? 2 : 1, b = m.length - 1; b >= 0; b -= g) {
      var I;
      if (void 0 !== (h = memberDec(m[b], a ? m[b - 1] : void 0, n, f, c, i, s, o, p, l, u))) assertValidReturnValue(i, h), 0 === i ? I = h : 1 === i ? (I = h.init, v = h.get || p.get, y = h.set || p.set, p = {
        get: v,
        set: y
      }) : p = h, void 0 !== I && (void 0 === d ? d = I : "function" == typeof d ? d = [d, I] : d.push(I));
    }
    if (0 === i || 1 === i) {
      if (void 0 === d) d = function (e, t) {
        return t;
      };else if ("function" != typeof d) {
        var w = d;
        d = function (e, t) {
          for (var r = t, a = w.length - 1; a >= 0; a--) r = w[a].call(e, r);
          return r;
        };
      } else {
        var M = d;
        d = function (e, t) {
          return M.call(e, t);
        };
      }
      e.push(d);
    }
    0 !== i && (1 === i ? (f.get = p.get, f.set = p.set) : 2 === i ? f.value = p : 3 === i ? f.get = p : 4 === i && (f.set = p), o ? 1 === i ? (e.push(function (e, t) {
      return p.get.call(e, t);
    }), e.push(function (e, t) {
      return p.set.call(e, t);
    })) : 2 === i ? e.push(p) : e.push(function (e, t) {
      return p.call(e, t);
    }) : Object.defineProperty(t, n, f));
  }
  function applyMemberDecs(e, t, r, a) {
    for (var n, i, s, o = [], c = new Map(), l = new Map(), u = 0; u < t.length; u++) {
      var f = t[u];
      if (Array.isArray(f)) {
        var d,
          p,
          h = f[1],
          v = f[2],
          y = f.length > 3,
          m = 16 & h,
          g = !!(8 & h),
          b = r;
        if (h &= 7, g ? (d = e, 0 !== h && (p = i = i || []), y && !s && (s = function (t) {
          return _checkInRHS(t) === e;
        }), b = s) : (d = e.prototype, 0 !== h && (p = n = n || [])), 0 !== h && !y) {
          var I = g ? l : c,
            w = I.get(v) || 0;
          if (!0 === w || 3 === w && 4 !== h || 4 === w && 3 !== h) throw new Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + v);
          I.set(v, !(!w && h > 2) || h);
        }
        applyMemberDec(o, d, f, m, v, h, g, y, p, b, a);
      }
    }
    return pushInitializers(o, n), pushInitializers(o, i), o;
  }
  function pushInitializers(e, t) {
    t && e.push(function (e) {
      for (var r = 0; r < t.length; r++) t[r].call(e);
      return e;
    });
  }
  function applyClassDecs(e, t, r, a) {
    if (t.length) {
      for (var n = [], i = e, s = e.name, o = r ? 2 : 1, c = t.length - 1; c >= 0; c -= o) {
        var l = {
          v: !1
        };
        try {
          var u = t[c].call(r ? t[c - 1] : void 0, i, {
            kind: "class",
            name: s,
            addInitializer: createAddInitializerMethod(n, l),
            metadata: a
          });
        } finally {
          l.v = !0;
        }
        void 0 !== u && (assertValidReturnValue(5, u), i = u);
      }
      return [defineMetadata(i, a), function () {
        for (var e = 0; e < n.length; e++) n[e].call(i);
      }];
    }
  }
  function defineMetadata(e, t) {
    return Object.defineProperty(e, Symbol.metadata || Symbol.for("Symbol.metadata"), {
      configurable: !0,
      enumerable: !0,
      value: t
    });
  }
  function _applyDecs2305(e, t, r, a, n, i) {
    if (arguments.length >= 6) var s = i[Symbol.metadata || Symbol.for("Symbol.metadata")];
    var o = Object.create(void 0 === s ? null : s),
      c = applyMemberDecs(e, t, n, o);
    return r.length || defineMetadata(e, o), {
      e: c,
      get c() {
        return applyClassDecs(e, r, a, o);
      }
    };
  }
  function _asyncGeneratorDelegate(t) {
    var e = {},
      n = !1;
    function pump(e, r) {
      return n = !0, r = new Promise(function (n) {
        n(t[e](r));
      }), {
        done: !1,
        value: new _OverloadYield(r, 1)
      };
    }
    return e["undefined" != typeof Symbol && Symbol.iterator || "@@iterator"] = function () {
      return this;
    }, e.next = function (t) {
      return n ? (n = !1, t) : pump("next", t);
    }, "function" == typeof t.throw && (e.throw = function (t) {
      if (n) throw n = !1, t;
      return pump("throw", t);
    }), "function" == typeof t.return && (e.return = function (t) {
      return n ? (n = !1, t) : pump("return", t);
    }), e;
  }
  function _asyncIterator(r) {
    var n,
      t,
      o,
      e = 2;
    for ("undefined" != typeof Symbol && (t = Symbol.asyncIterator, o = Symbol.iterator); e--;) {
      if (t && null != (n = r[t])) return n.call(r);
      if (o && null != (n = r[o])) return new AsyncFromSyncIterator(n.call(r));
      t = "@@asyncIterator", o = "@@iterator";
    }
    throw new TypeError("Object is not async iterable");
  }
  function AsyncFromSyncIterator(r) {
    function AsyncFromSyncIteratorContinuation(r) {
      if (Object(r) !== r) return Promise.reject(new TypeError(r + " is not an object."));
      var n = r.done;
      return Promise.resolve(r.value).then(function (r) {
        return {
          value: r,
          done: n
        };
      });
    }
    return AsyncFromSyncIterator = function (r) {
      this.s = r, this.n = r.next;
    }, AsyncFromSyncIterator.prototype = {
      s: null,
      n: null,
      next: function () {
        return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments));
      },
      return: function (r) {
        var n = this.s.return;
        return void 0 === n ? Promise.resolve({
          value: r,
          done: !0
        }) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
      },
      throw: function (r) {
        var n = this.s.return;
        return void 0 === n ? Promise.reject(r) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
      }
    }, new AsyncFromSyncIterator(r);
  }
  function _awaitAsyncGenerator(e) {
    return new _OverloadYield(e, 0);
  }
  function _checkInRHS(e) {
    if (Object(e) !== e) throw TypeError("right-hand side of 'in' should be an object, got " + (null !== e ? typeof e : "null"));
    return e;
  }
  function _defineAccessor(e, r, n, t) {
    var c = {
      configurable: !0,
      enumerable: !0
    };
    return c[e] = t, Object.defineProperty(r, n, c);
  }
  function dispose_SuppressedError(r, e) {
    return "undefined" != typeof SuppressedError ? dispose_SuppressedError = SuppressedError : (dispose_SuppressedError = function (r, e) {
      this.suppressed = r, this.error = e, this.stack = new Error().stack;
    }, dispose_SuppressedError.prototype = Object.create(Error.prototype, {
      constructor: {
        value: dispose_SuppressedError,
        writable: !0,
        configurable: !0
      }
    })), new dispose_SuppressedError(r, e);
  }
  function _dispose(r, e, s) {
    function next() {
      for (; r.length > 0;) try {
        var o = r.pop(),
          p = o.d.call(o.v);
        if (o.a) return Promise.resolve(p).then(next, err);
      } catch (r) {
        return err(r);
      }
      if (s) throw e;
    }
    function err(r) {
      return e = s ? new dispose_SuppressedError(r, e) : r, s = !0, next();
    }
    return next();
  }
  function _importDeferProxy(e) {
    var t = null,
      constValue = function (e) {
        return function () {
          return e;
        };
      },
      proxy = function (r) {
        return function (n, o, f) {
          return null === t && (t = e()), r(t, o, f);
        };
      };
    return new Proxy({}, {
      defineProperty: constValue(!1),
      deleteProperty: constValue(!1),
      get: proxy(Reflect.get),
      getOwnPropertyDescriptor: proxy(Reflect.getOwnPropertyDescriptor),
      getPrototypeOf: constValue(null),
      isExtensible: constValue(!1),
      has: proxy(Reflect.has),
      ownKeys: proxy(Reflect.ownKeys),
      preventExtensions: constValue(!0),
      set: constValue(!1),
      setPrototypeOf: constValue(!1)
    });
  }
  function _iterableToArrayLimit(r, l) {
    var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
    if (null != t) {
      var e,
        n,
        i,
        u,
        a = [],
        f = !0,
        o = !1;
      try {
        if (i = (t = t.call(r)).next, 0 === l) {
          if (Object(t) !== t) return;
          f = !1;
        } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
      } catch (r) {
        o = !0, n = r;
      } finally {
        try {
          if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return;
        } finally {
          if (o) throw n;
        }
      }
      return a;
    }
  }
  function _iterableToArrayLimitLoose(e, r) {
    var t = e && ("undefined" != typeof Symbol && e[Symbol.iterator] || e["@@iterator"]);
    if (null != t) {
      var o,
        l = [];
      for (t = t.call(e); e.length < r && !(o = t.next()).done;) l.push(o.value);
      return l;
    }
  }
  var REACT_ELEMENT_TYPE;
  function _jsx(e, r, E, l) {
    REACT_ELEMENT_TYPE || (REACT_ELEMENT_TYPE = "function" == typeof Symbol && Symbol.for && Symbol.for("react.element") || 60103);
    var o = e && e.defaultProps,
      n = arguments.length - 3;
    if (r || 0 === n || (r = {
      children: void 0
    }), 1 === n) r.children = l;else if (n > 1) {
      for (var t = new Array(n), f = 0; f < n; f++) t[f] = arguments[f + 3];
      r.children = t;
    }
    if (r && o) for (var i in o) void 0 === r[i] && (r[i] = o[i]);else r || (r = o || {});
    return {
      $$typeof: REACT_ELEMENT_TYPE,
      type: e,
      key: void 0 === E ? null : "" + E,
      ref: null,
      props: r,
      _owner: null
    };
  }
  function ownKeys(e, r) {
    var t = Object.keys(e);
    if (Object.getOwnPropertySymbols) {
      var o = Object.getOwnPropertySymbols(e);
      r && (o = o.filter(function (r) {
        return Object.getOwnPropertyDescriptor(e, r).enumerable;
      })), t.push.apply(t, o);
    }
    return t;
  }
  function _objectSpread2(e) {
    for (var r = 1; r < arguments.length; r++) {
      var t = null != arguments[r] ? arguments[r] : {};
      r % 2 ? ownKeys(Object(t), !0).forEach(function (r) {
        _defineProperty(e, r, t[r]);
      }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
        Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
      });
    }
    return e;
  }
  function _regeneratorRuntime() {
    "use strict"; /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/facebook/regenerator/blob/main/LICENSE */
    _regeneratorRuntime = function () {
      return e;
    };
    var t,
      e = {},
      r = Object.prototype,
      n = r.hasOwnProperty,
      o = Object.defineProperty || function (t, e, r) {
        t[e] = r.value;
      },
      i = "function" == typeof Symbol ? Symbol : {},
      a = i.iterator || "@@iterator",
      c = i.asyncIterator || "@@asyncIterator",
      u = i.toStringTag || "@@toStringTag";
    function define(t, e, r) {
      return Object.defineProperty(t, e, {
        value: r,
        enumerable: !0,
        configurable: !0,
        writable: !0
      }), t[e];
    }
    try {
      define({}, "");
    } catch (t) {
      define = function (t, e, r) {
        return t[e] = r;
      };
    }
    function wrap(t, e, r, n) {
      var i = e && e.prototype instanceof Generator ? e : Generator,
        a = Object.create(i.prototype),
        c = new Context(n || []);
      return o(a, "_invoke", {
        value: makeInvokeMethod(t, r, c)
      }), a;
    }
    function tryCatch(t, e, r) {
      try {
        return {
          type: "normal",
          arg: t.call(e, r)
        };
      } catch (t) {
        return {
          type: "throw",
          arg: t
        };
      }
    }
    e.wrap = wrap;
    var h = "suspendedStart",
      l = "suspendedYield",
      f = "executing",
      s = "completed",
      y = {};
    function Generator() {}
    function GeneratorFunction() {}
    function GeneratorFunctionPrototype() {}
    var p = {};
    define(p, a, function () {
      return this;
    });
    var d = Object.getPrototypeOf,
      v = d && d(d(values([])));
    v && v !== r && n.call(v, a) && (p = v);
    var g = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(p);
    function defineIteratorMethods(t) {
      ["next", "throw", "return"].forEach(function (e) {
        define(t, e, function (t) {
          return this._invoke(e, t);
        });
      });
    }
    function AsyncIterator(t, e) {
      function invoke(r, o, i, a) {
        var c = tryCatch(t[r], t, o);
        if ("throw" !== c.type) {
          var u = c.arg,
            h = u.value;
          return h && "object" == typeof h && n.call(h, "__await") ? e.resolve(h.__await).then(function (t) {
            invoke("next", t, i, a);
          }, function (t) {
            invoke("throw", t, i, a);
          }) : e.resolve(h).then(function (t) {
            u.value = t, i(u);
          }, function (t) {
            return invoke("throw", t, i, a);
          });
        }
        a(c.arg);
      }
      var r;
      o(this, "_invoke", {
        value: function (t, n) {
          function callInvokeWithMethodAndArg() {
            return new e(function (e, r) {
              invoke(t, n, e, r);
            });
          }
          return r = r ? r.then(callInvokeWithMethodAndArg, callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
        }
      });
    }
    function makeInvokeMethod(e, r, n) {
      var o = h;
      return function (i, a) {
        if (o === f) throw new Error("Generator is already running");
        if (o === s) {
          if ("throw" === i) throw a;
          return {
            value: t,
            done: !0
          };
        }
        for (n.method = i, n.arg = a;;) {
          var c = n.delegate;
          if (c) {
            var u = maybeInvokeDelegate(c, n);
            if (u) {
              if (u === y) continue;
              return u;
            }
          }
          if ("next" === n.method) n.sent = n._sent = n.arg;else if ("throw" === n.method) {
            if (o === h) throw o = s, n.arg;
            n.dispatchException(n.arg);
          } else "return" === n.method && n.abrupt("return", n.arg);
          o = f;
          var p = tryCatch(e, r, n);
          if ("normal" === p.type) {
            if (o = n.done ? s : l, p.arg === y) continue;
            return {
              value: p.arg,
              done: n.done
            };
          }
          "throw" === p.type && (o = s, n.method = "throw", n.arg = p.arg);
        }
      };
    }
    function maybeInvokeDelegate(e, r) {
      var n = r.method,
        o = e.iterator[n];
      if (o === t) return r.delegate = null, "throw" === n && e.iterator.return && (r.method = "return", r.arg = t, maybeInvokeDelegate(e, r), "throw" === r.method) || "return" !== n && (r.method = "throw", r.arg = new TypeError("The iterator does not provide a '" + n + "' method")), y;
      var i = tryCatch(o, e.iterator, r.arg);
      if ("throw" === i.type) return r.method = "throw", r.arg = i.arg, r.delegate = null, y;
      var a = i.arg;
      return a ? a.done ? (r[e.resultName] = a.value, r.next = e.nextLoc, "return" !== r.method && (r.method = "next", r.arg = t), r.delegate = null, y) : a : (r.method = "throw", r.arg = new TypeError("iterator result is not an object"), r.delegate = null, y);
    }
    function pushTryEntry(t) {
      var e = {
        tryLoc: t[0]
      };
      1 in t && (e.catchLoc = t[1]), 2 in t && (e.finallyLoc = t[2], e.afterLoc = t[3]), this.tryEntries.push(e);
    }
    function resetTryEntry(t) {
      var e = t.completion || {};
      e.type = "normal", delete e.arg, t.completion = e;
    }
    function Context(t) {
      this.tryEntries = [{
        tryLoc: "root"
      }], t.forEach(pushTryEntry, this), this.reset(!0);
    }
    function values(e) {
      if (e || "" === e) {
        var r = e[a];
        if (r) return r.call(e);
        if ("function" == typeof e.next) return e;
        if (!isNaN(e.length)) {
          var o = -1,
            i = function next() {
              for (; ++o < e.length;) if (n.call(e, o)) return next.value = e[o], next.done = !1, next;
              return next.value = t, next.done = !0, next;
            };
          return i.next = i;
        }
      }
      throw new TypeError(typeof e + " is not iterable");
    }
    return GeneratorFunction.prototype = GeneratorFunctionPrototype, o(g, "constructor", {
      value: GeneratorFunctionPrototype,
      configurable: !0
    }), o(GeneratorFunctionPrototype, "constructor", {
      value: GeneratorFunction,
      configurable: !0
    }), GeneratorFunction.displayName = define(GeneratorFunctionPrototype, u, "GeneratorFunction"), e.isGeneratorFunction = function (t) {
      var e = "function" == typeof t && t.constructor;
      return !!e && (e === GeneratorFunction || "GeneratorFunction" === (e.displayName || e.name));
    }, e.mark = function (t) {
      return Object.setPrototypeOf ? Object.setPrototypeOf(t, GeneratorFunctionPrototype) : (t.__proto__ = GeneratorFunctionPrototype, define(t, u, "GeneratorFunction")), t.prototype = Object.create(g), t;
    }, e.awrap = function (t) {
      return {
        __await: t
      };
    }, defineIteratorMethods(AsyncIterator.prototype), define(AsyncIterator.prototype, c, function () {
      return this;
    }), e.AsyncIterator = AsyncIterator, e.async = function (t, r, n, o, i) {
      void 0 === i && (i = Promise);
      var a = new AsyncIterator(wrap(t, r, n, o), i);
      return e.isGeneratorFunction(r) ? a : a.next().then(function (t) {
        return t.done ? t.value : a.next();
      });
    }, defineIteratorMethods(g), define(g, u, "Generator"), define(g, a, function () {
      return this;
    }), define(g, "toString", function () {
      return "[object Generator]";
    }), e.keys = function (t) {
      var e = Object(t),
        r = [];
      for (var n in e) r.push(n);
      return r.reverse(), function next() {
        for (; r.length;) {
          var t = r.pop();
          if (t in e) return next.value = t, next.done = !1, next;
        }
        return next.done = !0, next;
      };
    }, e.values = values, Context.prototype = {
      constructor: Context,
      reset: function (e) {
        if (this.prev = 0, this.next = 0, this.sent = this._sent = t, this.done = !1, this.delegate = null, this.method = "next", this.arg = t, this.tryEntries.forEach(resetTryEntry), !e) for (var r in this) "t" === r.charAt(0) && n.call(this, r) && !isNaN(+r.slice(1)) && (this[r] = t);
      },
      stop: function () {
        this.done = !0;
        var t = this.tryEntries[0].completion;
        if ("throw" === t.type) throw t.arg;
        return this.rval;
      },
      dispatchException: function (e) {
        if (this.done) throw e;
        var r = this;
        function handle(n, o) {
          return a.type = "throw", a.arg = e, r.next = n, o && (r.method = "next", r.arg = t), !!o;
        }
        for (var o = this.tryEntries.length - 1; o >= 0; --o) {
          var i = this.tryEntries[o],
            a = i.completion;
          if ("root" === i.tryLoc) return handle("end");
          if (i.tryLoc <= this.prev) {
            var c = n.call(i, "catchLoc"),
              u = n.call(i, "finallyLoc");
            if (c && u) {
              if (this.prev < i.catchLoc) return handle(i.catchLoc, !0);
              if (this.prev < i.finallyLoc) return handle(i.finallyLoc);
            } else if (c) {
              if (this.prev < i.catchLoc) return handle(i.catchLoc, !0);
            } else {
              if (!u) throw new Error("try statement without catch or finally");
              if (this.prev < i.finallyLoc) return handle(i.finallyLoc);
            }
          }
        }
      },
      abrupt: function (t, e) {
        for (var r = this.tryEntries.length - 1; r >= 0; --r) {
          var o = this.tryEntries[r];
          if (o.tryLoc <= this.prev && n.call(o, "finallyLoc") && this.prev < o.finallyLoc) {
            var i = o;
            break;
          }
        }
        i && ("break" === t || "continue" === t) && i.tryLoc <= e && e <= i.finallyLoc && (i = null);
        var a = i ? i.completion : {};
        return a.type = t, a.arg = e, i ? (this.method = "next", this.next = i.finallyLoc, y) : this.complete(a);
      },
      complete: function (t, e) {
        if ("throw" === t.type) throw t.arg;
        return "break" === t.type || "continue" === t.type ? this.next = t.arg : "return" === t.type ? (this.rval = this.arg = t.arg, this.method = "return", this.next = "end") : "normal" === t.type && e && (this.next = e), y;
      },
      finish: function (t) {
        for (var e = this.tryEntries.length - 1; e >= 0; --e) {
          var r = this.tryEntries[e];
          if (r.finallyLoc === t) return this.complete(r.completion, r.afterLoc), resetTryEntry(r), y;
        }
      },
      catch: function (t) {
        for (var e = this.tryEntries.length - 1; e >= 0; --e) {
          var r = this.tryEntries[e];
          if (r.tryLoc === t) {
            var n = r.completion;
            if ("throw" === n.type) {
              var o = n.arg;
              resetTryEntry(r);
            }
            return o;
          }
        }
        throw new Error("illegal catch attempt");
      },
      delegateYield: function (e, r, n) {
        return this.delegate = {
          iterator: values(e),
          resultName: r,
          nextLoc: n
        }, "next" === this.method && (this.arg = t), y;
      }
    }, e;
  }
  function _typeof(o) {
    "@babel/helpers - typeof";

    return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) {
      return typeof o;
    } : function (o) {
      return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
    }, _typeof(o);
  }
  function _using(o, e, n) {
    if (null == e) return e;
    if ("object" != typeof e) throw new TypeError("using declarations can only be used with objects, null, or undefined.");
    if (n) var r = e[Symbol.asyncDispose || Symbol.for("Symbol.asyncDispose")];
    if (null == r && (r = e[Symbol.dispose || Symbol.for("Symbol.dispose")]), "function" != typeof r) throw new TypeError("Property [Symbol.dispose] is not a function.");
    return o.push({
      v: e,
      d: r,
      a: n
    }), e;
  }
  function _wrapRegExp() {
    _wrapRegExp = function (e, r) {
      return new BabelRegExp(e, void 0, r);
    };
    var e = RegExp.prototype,
      r = new WeakMap();
    function BabelRegExp(e, t, p) {
      var o = new RegExp(e, t);
      return r.set(o, p || r.get(e)), _setPrototypeOf(o, BabelRegExp.prototype);
    }
    function buildGroups(e, t) {
      var p = r.get(t);
      return Object.keys(p).reduce(function (r, t) {
        var o = p[t];
        if ("number" == typeof o) r[t] = e[o];else {
          for (var i = 0; void 0 === e[o[i]] && i + 1 < o.length;) i++;
          r[t] = e[o[i]];
        }
        return r;
      }, Object.create(null));
    }
    return _inherits(BabelRegExp, RegExp), BabelRegExp.prototype.exec = function (r) {
      var t = e.exec.call(this, r);
      if (t) {
        t.groups = buildGroups(t, this);
        var p = t.indices;
        p && (p.groups = buildGroups(p, this));
      }
      return t;
    }, BabelRegExp.prototype[Symbol.replace] = function (t, p) {
      if ("string" == typeof p) {
        var o = r.get(this);
        return e[Symbol.replace].call(this, t, p.replace(/\$<([^>]+)>/g, function (e, r) {
          var t = o[r];
          return "$" + (Array.isArray(t) ? t.join("$") : t);
        }));
      }
      if ("function" == typeof p) {
        var i = this;
        return e[Symbol.replace].call(this, t, function () {
          var e = arguments;
          return "object" != typeof e[e.length - 1] && (e = [].slice.call(e)).push(buildGroups(e, i)), p.apply(this, e);
        });
      }
      return e[Symbol.replace].call(this, t, p);
    }, _wrapRegExp.apply(this, arguments);
  }
  function _AwaitValue(value) {
    this.wrapped = value;
  }
  function _wrapAsyncGenerator(fn) {
    return function () {
      return new _AsyncGenerator(fn.apply(this, arguments));
    };
  }
  function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
    try {
      var info = gen[key](arg);
      var value = info.value;
    } catch (error) {
      reject(error);
      return;
    }
    if (info.done) {
      resolve(value);
    } else {
      Promise.resolve(value).then(_next, _throw);
    }
  }
  function _asyncToGenerator(fn) {
    return function () {
      var self = this,
        args = arguments;
      return new Promise(function (resolve, reject) {
        var gen = fn.apply(self, args);
        function _next(value) {
          asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
        }
        function _throw(err) {
          asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
        }
        _next(undefined);
      });
    };
  }
  function _classCallCheck(instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  }
  function _defineProperties(target, props) {
    for (var i = 0; i < props.length; i++) {
      var descriptor = props[i];
      descriptor.enumerable = descriptor.enumerable || false;
      descriptor.configurable = true;
      if ("value" in descriptor) descriptor.writable = true;
      Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor);
    }
  }
  function _createClass(Constructor, protoProps, staticProps) {
    if (protoProps) _defineProperties(Constructor.prototype, protoProps);
    if (staticProps) _defineProperties(Constructor, staticProps);
    Object.defineProperty(Constructor, "prototype", {
      writable: false
    });
    return Constructor;
  }
  function _defineEnumerableProperties(obj, descs) {
    for (var key in descs) {
      var desc = descs[key];
      desc.configurable = desc.enumerable = true;
      if ("value" in desc) desc.writable = true;
      Object.defineProperty(obj, key, desc);
    }
    if (Object.getOwnPropertySymbols) {
      var objectSymbols = Object.getOwnPropertySymbols(descs);
      for (var i = 0; i < objectSymbols.length; i++) {
        var sym = objectSymbols[i];
        var desc = descs[sym];
        desc.configurable = desc.enumerable = true;
        if ("value" in desc) desc.writable = true;
        Object.defineProperty(obj, sym, desc);
      }
    }
    return obj;
  }
  function _defaults(obj, defaults) {
    var keys = Object.getOwnPropertyNames(defaults);
    for (var i = 0; i < keys.length; i++) {
      var key = keys[i];
      var value = Object.getOwnPropertyDescriptor(defaults, key);
      if (value && value.configurable && obj[key] === undefined) {
        Object.defineProperty(obj, key, value);
      }
    }
    return obj;
  }
  function _defineProperty(obj, key, value) {
    key = _toPropertyKey(key);
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }
    return obj;
  }
  function _extends() {
    _extends = Object.assign ? Object.assign.bind() : function (target) {
      for (var i = 1; i < arguments.length; i++) {
        var source = arguments[i];
        for (var key in source) {
          if (Object.prototype.hasOwnProperty.call(source, key)) {
            target[key] = source[key];
          }
        }
      }
      return target;
    };
    return _extends.apply(this, arguments);
  }
  function _objectSpread(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? Object(arguments[i]) : {};
      var ownKeys = Object.keys(source);
      if (typeof Object.getOwnPropertySymbols === 'function') {
        ownKeys.push.apply(ownKeys, Object.getOwnPropertySymbols(source).filter(function (sym) {
          return Object.getOwnPropertyDescriptor(source, sym).enumerable;
        }));
      }
      ownKeys.forEach(function (key) {
        _defineProperty(target, key, source[key]);
      });
    }
    return target;
  }
  function _inherits(subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function");
    }
    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        writable: true,
        configurable: true
      }
    });
    Object.defineProperty(subClass, "prototype", {
      writable: false
    });
    if (superClass) _setPrototypeOf(subClass, superClass);
  }
  function _inheritsLoose(subClass, superClass) {
    subClass.prototype = Object.create(superClass.prototype);
    subClass.prototype.constructor = subClass;
    _setPrototypeOf(subClass, superClass);
  }
  function _getPrototypeOf(o) {
    _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function _getPrototypeOf(o) {
      return o.__proto__ || Object.getPrototypeOf(o);
    };
    return _getPrototypeOf(o);
  }
  function _setPrototypeOf(o, p) {
    _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function _setPrototypeOf(o, p) {
      o.__proto__ = p;
      return o;
    };
    return _setPrototypeOf(o, p);
  }
  function _isNativeReflectConstruct() {
    if (typeof Reflect === "undefined" || !Reflect.construct) return false;
    if (Reflect.construct.sham) return false;
    if (typeof Proxy === "function") return true;
    try {
      Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
      return true;
    } catch (e) {
      return false;
    }
  }
  function _construct(Parent, args, Class) {
    if (_isNativeReflectConstruct()) {
      _construct = Reflect.construct.bind();
    } else {
      _construct = function _construct(Parent, args, Class) {
        var a = [null];
        a.push.apply(a, args);
        var Constructor = Function.bind.apply(Parent, a);
        var instance = new Constructor();
        if (Class) _setPrototypeOf(instance, Class.prototype);
        return instance;
      };
    }
    return _construct.apply(null, arguments);
  }
  function _isNativeFunction(fn) {
    return Function.toString.call(fn).indexOf("[native code]") !== -1;
  }
  function _wrapNativeSuper(Class) {
    var _cache = typeof Map === "function" ? new Map() : undefined;
    _wrapNativeSuper = function _wrapNativeSuper(Class) {
      if (Class === null || !_isNativeFunction(Class)) return Class;
      if (typeof Class !== "function") {
        throw new TypeError("Super expression must either be null or a function");
      }
      if (typeof _cache !== "undefined") {
        if (_cache.has(Class)) return _cache.get(Class);
        _cache.set(Class, Wrapper);
      }
      function Wrapper() {
        return _construct(Class, arguments, _getPrototypeOf(this).constructor);
      }
      Wrapper.prototype = Object.create(Class.prototype, {
        constructor: {
          value: Wrapper,
          enumerable: false,
          writable: true,
          configurable: true
        }
      });
      return _setPrototypeOf(Wrapper, Class);
    };
    return _wrapNativeSuper(Class);
  }
  function _instanceof(left, right) {
    if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
      return !!right[Symbol.hasInstance](left);
    } else {
      return left instanceof right;
    }
  }
  function _interopRequireDefault(obj) {
    return obj && obj.__esModule ? obj : {
      default: obj
    };
  }
  function _getRequireWildcardCache(nodeInterop) {
    if (typeof WeakMap !== "function") return null;
    var cacheBabelInterop = new WeakMap();
    var cacheNodeInterop = new WeakMap();
    return (_getRequireWildcardCache = function (nodeInterop) {
      return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
    })(nodeInterop);
  }
  function _interopRequireWildcard(obj, nodeInterop) {
    if (!nodeInterop && obj && obj.__esModule) {
      return obj;
    }
    if (obj === null || typeof obj !== "object" && typeof obj !== "function") {
      return {
        default: obj
      };
    }
    var cache = _getRequireWildcardCache(nodeInterop);
    if (cache && cache.has(obj)) {
      return cache.get(obj);
    }
    var newObj = {};
    var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor;
    for (var key in obj) {
      if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) {
        var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null;
        if (desc && (desc.get || desc.set)) {
          Object.defineProperty(newObj, key, desc);
        } else {
          newObj[key] = obj[key];
        }
      }
    }
    newObj.default = obj;
    if (cache) {
      cache.set(obj, newObj);
    }
    return newObj;
  }
  function _newArrowCheck(innerThis, boundThis) {
    if (innerThis !== boundThis) {
      throw new TypeError("Cannot instantiate an arrow function");
    }
  }
  function _objectDestructuringEmpty(obj) {
    if (obj == null) throw new TypeError("Cannot destructure " + obj);
  }
  function _objectWithoutPropertiesLoose(source, excluded) {
    if (source == null) return {};
    var target = {};
    var sourceKeys = Object.keys(source);
    var key, i;
    for (i = 0; i < sourceKeys.length; i++) {
      key = sourceKeys[i];
      if (excluded.indexOf(key) >= 0) continue;
      target[key] = source[key];
    }
    return target;
  }
  function _objectWithoutProperties(source, excluded) {
    if (source == null) return {};
    var target = _objectWithoutPropertiesLoose(source, excluded);
    var key, i;
    if (Object.getOwnPropertySymbols) {
      var sourceSymbolKeys = Object.getOwnPropertySymbols(source);
      for (i = 0; i < sourceSymbolKeys.length; i++) {
        key = sourceSymbolKeys[i];
        if (excluded.indexOf(key) >= 0) continue;
        if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;
        target[key] = source[key];
      }
    }
    return target;
  }
  function _assertThisInitialized(self) {
    if (self === void 0) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }
    return self;
  }
  function _possibleConstructorReturn(self, call) {
    if (call && (typeof call === "object" || typeof call === "function")) {
      return call;
    } else if (call !== void 0) {
      throw new TypeError("Derived constructors may only return object or undefined");
    }
    return _assertThisInitialized(self);
  }
  function _createSuper(Derived) {
    var hasNativeReflectConstruct = _isNativeReflectConstruct();
    return function _createSuperInternal() {
      var Super = _getPrototypeOf(Derived),
        result;
      if (hasNativeReflectConstruct) {
        var NewTarget = _getPrototypeOf(this).constructor;
        result = Reflect.construct(Super, arguments, NewTarget);
      } else {
        result = Super.apply(this, arguments);
      }
      return _possibleConstructorReturn(this, result);
    };
  }
  function _superPropBase(object, property) {
    while (!Object.prototype.hasOwnProperty.call(object, property)) {
      object = _getPrototypeOf(object);
      if (object === null) break;
    }
    return object;
  }
  function _get() {
    if (typeof Reflect !== "undefined" && Reflect.get) {
      _get = Reflect.get.bind();
    } else {
      _get = function _get(target, property, receiver) {
        var base = _superPropBase(target, property);
        if (!base) return;
        var desc = Object.getOwnPropertyDescriptor(base, property);
        if (desc.get) {
          return desc.get.call(arguments.length < 3 ? target : receiver);
        }
        return desc.value;
      };
    }
    return _get.apply(this, arguments);
  }
  function set(target, property, value, receiver) {
    if (typeof Reflect !== "undefined" && Reflect.set) {
      set = Reflect.set;
    } else {
      set = function set(target, property, value, receiver) {
        var base = _superPropBase(target, property);
        var desc;
        if (base) {
          desc = Object.getOwnPropertyDescriptor(base, property);
          if (desc.set) {
            desc.set.call(receiver, value);
            return true;
          } else if (!desc.writable) {
            return false;
          }
        }
        desc = Object.getOwnPropertyDescriptor(receiver, property);
        if (desc) {
          if (!desc.writable) {
            return false;
          }
          desc.value = value;
          Object.defineProperty(receiver, property, desc);
        } else {
          _defineProperty(receiver, property, value);
        }
        return true;
      };
    }
    return set(target, property, value, receiver);
  }
  function _set(target, property, value, receiver, isStrict) {
    var s = set(target, property, value, receiver || target);
    if (!s && isStrict) {
      throw new TypeError('failed to set property');
    }
    return value;
  }
  function _taggedTemplateLiteral(strings, raw) {
    if (!raw) {
      raw = strings.slice(0);
    }
    return Object.freeze(Object.defineProperties(strings, {
      raw: {
        value: Object.freeze(raw)
      }
    }));
  }
  function _taggedTemplateLiteralLoose(strings, raw) {
    if (!raw) {
      raw = strings.slice(0);
    }
    strings.raw = raw;
    return strings;
  }
  function _readOnlyError(name) {
    throw new TypeError("\"" + name + "\" is read-only");
  }
  function _writeOnlyError(name) {
    throw new TypeError("\"" + name + "\" is write-only");
  }
  function _classNameTDZError(name) {
    throw new ReferenceError("Class \"" + name + "\" cannot be referenced in computed property keys.");
  }
  function _temporalUndefined() {}
  function _tdz(name) {
    throw new ReferenceError(name + " is not defined - temporal dead zone");
  }
  function _temporalRef(val, name) {
    return val === _temporalUndefined ? _tdz(name) : val;
  }
  function _slicedToArray(arr, i) {
    return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
  }
  function _slicedToArrayLoose(arr, i) {
    return _arrayWithHoles(arr) || _iterableToArrayLimitLoose(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
  }
  function _toArray(arr) {
    return _arrayWithHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableRest();
  }
  function _toConsumableArray(arr) {
    return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
  }
  function _arrayWithoutHoles(arr) {
    if (Array.isArray(arr)) return _arrayLikeToArray(arr);
  }
  function _arrayWithHoles(arr) {
    if (Array.isArray(arr)) return arr;
  }
  function _maybeArrayLike(next, arr, i) {
    if (arr && !Array.isArray(arr) && typeof arr.length === "number") {
      var len = arr.length;
      return _arrayLikeToArray(arr, i !== void 0 && i < len ? i : len);
    }
    return next(arr, i);
  }
  function _iterableToArray(iter) {
    if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
  }
  function _unsupportedIterableToArray(o, minLen) {
    if (!o) return;
    if (typeof o === "string") return _arrayLikeToArray(o, minLen);
    var n = Object.prototype.toString.call(o).slice(8, -1);
    if (n === "Object" && o.constructor) n = o.constructor.name;
    if (n === "Map" || n === "Set") return Array.from(o);
    if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
  }
  function _arrayLikeToArray(arr, len) {
    if (len == null || len > arr.length) len = arr.length;
    for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
    return arr2;
  }
  function _nonIterableSpread() {
    throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }
  function _nonIterableRest() {
    throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }
  function _createForOfIteratorHelper(o, allowArrayLike) {
    var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
    if (!it) {
      if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
        if (it) o = it;
        var i = 0;
        var F = function () {};
        return {
          s: F,
          n: function () {
            if (i >= o.length) return {
              done: true
            };
            return {
              done: false,
              value: o[i++]
            };
          },
          e: function (e) {
            throw e;
          },
          f: F
        };
      }
      throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
    }
    var normalCompletion = true,
      didErr = false,
      err;
    return {
      s: function () {
        it = it.call(o);
      },
      n: function () {
        var step = it.next();
        normalCompletion = step.done;
        return step;
      },
      e: function (e) {
        didErr = true;
        err = e;
      },
      f: function () {
        try {
          if (!normalCompletion && it.return != null) it.return();
        } finally {
          if (didErr) throw err;
        }
      }
    };
  }
  function _createForOfIteratorHelperLoose(o, allowArrayLike) {
    var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
    if (it) return (it = it.call(o)).next.bind(it);
    if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
      if (it) o = it;
      var i = 0;
      return function () {
        if (i >= o.length) return {
          done: true
        };
        return {
          done: false,
          value: o[i++]
        };
      };
    }
    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
  }
  function _skipFirstGeneratorNext(fn) {
    return function () {
      var it = fn.apply(this, arguments);
      it.next();
      return it;
    };
  }
  function _toPrimitive(input, hint) {
    if (typeof input !== "object" || input === null) return input;
    var prim = input[Symbol.toPrimitive];
    if (prim !== undefined) {
      var res = prim.call(input, hint || "default");
      if (typeof res !== "object") return res;
      throw new TypeError("@@toPrimitive must return a primitive value.");
    }
    return (hint === "string" ? String : Number)(input);
  }
  function _toPropertyKey(arg) {
    var key = _toPrimitive(arg, "string");
    return typeof key === "symbol" ? key : String(key);
  }
  function _initializerWarningHelper(descriptor, context) {
    throw new Error('Decorating class property failed. Please ensure that ' + 'transform-class-properties is enabled and runs after the decorators transform.');
  }
  function _initializerDefineProperty(target, property, descriptor, context) {
    if (!descriptor) return;
    Object.defineProperty(target, property, {
      enumerable: descriptor.enumerable,
      configurable: descriptor.configurable,
      writable: descriptor.writable,
      value: descriptor.initializer ? descriptor.initializer.call(context) : void 0
    });
  }
  function _applyDecoratedDescriptor(target, property, decorators, descriptor, context) {
    var desc = {};
    Object.keys(descriptor).forEach(function (key) {
      desc[key] = descriptor[key];
    });
    desc.enumerable = !!desc.enumerable;
    desc.configurable = !!desc.configurable;
    if ('value' in desc || desc.initializer) {
      desc.writable = true;
    }
    desc = decorators.slice().reverse().reduce(function (desc, decorator) {
      return decorator(target, property, desc) || desc;
    }, desc);
    if (context && desc.initializer !== void 0) {
      desc.value = desc.initializer ? desc.initializer.call(context) : void 0;
      desc.initializer = undefined;
    }
    if (desc.initializer === void 0) {
      Object.defineProperty(target, property, desc);
      desc = null;
    }
    return desc;
  }
  var id$1 = 0;
  function _classPrivateFieldLooseKey(name) {
    return "__private_" + id$1++ + "_" + name;
  }
  function _classPrivateFieldLooseBase(receiver, privateKey) {
    if (!Object.prototype.hasOwnProperty.call(receiver, privateKey)) {
      throw new TypeError("attempted to use private field on non-instance");
    }
    return receiver;
  }
  function _classPrivateFieldGet(receiver, privateMap) {
    var descriptor = _classExtractFieldDescriptor(receiver, privateMap, "get");
    return _classApplyDescriptorGet(receiver, descriptor);
  }
  function _classPrivateFieldSet(receiver, privateMap, value) {
    var descriptor = _classExtractFieldDescriptor(receiver, privateMap, "set");
    _classApplyDescriptorSet(receiver, descriptor, value);
    return value;
  }
  function _classPrivateFieldDestructureSet(receiver, privateMap) {
    var descriptor = _classExtractFieldDescriptor(receiver, privateMap, "set");
    return _classApplyDescriptorDestructureSet(receiver, descriptor);
  }
  function _classExtractFieldDescriptor(receiver, privateMap, action) {
    if (!privateMap.has(receiver)) {
      throw new TypeError("attempted to " + action + " private field on non-instance");
    }
    return privateMap.get(receiver);
  }
  function _classStaticPrivateFieldSpecGet(receiver, classConstructor, descriptor) {
    _classCheckPrivateStaticAccess(receiver, classConstructor);
    _classCheckPrivateStaticFieldDescriptor(descriptor, "get");
    return _classApplyDescriptorGet(receiver, descriptor);
  }
  function _classStaticPrivateFieldSpecSet(receiver, classConstructor, descriptor, value) {
    _classCheckPrivateStaticAccess(receiver, classConstructor);
    _classCheckPrivateStaticFieldDescriptor(descriptor, "set");
    _classApplyDescriptorSet(receiver, descriptor, value);
    return value;
  }
  function _classStaticPrivateMethodGet(receiver, classConstructor, method) {
    _classCheckPrivateStaticAccess(receiver, classConstructor);
    return method;
  }
  function _classStaticPrivateMethodSet() {
    throw new TypeError("attempted to set read only static private field");
  }
  function _classApplyDescriptorGet(receiver, descriptor) {
    if (descriptor.get) {
      return descriptor.get.call(receiver);
    }
    return descriptor.value;
  }
  function _classApplyDescriptorSet(receiver, descriptor, value) {
    if (descriptor.set) {
      descriptor.set.call(receiver, value);
    } else {
      if (!descriptor.writable) {
        throw new TypeError("attempted to set read only private field");
      }
      descriptor.value = value;
    }
  }
  function _classApplyDescriptorDestructureSet(receiver, descriptor) {
    if (descriptor.set) {
      if (!("__destrObj" in descriptor)) {
        descriptor.__destrObj = {
          set value(v) {
            descriptor.set.call(receiver, v);
          }
        };
      }
      return descriptor.__destrObj;
    } else {
      if (!descriptor.writable) {
        throw new TypeError("attempted to set read only private field");
      }
      return descriptor;
    }
  }
  function _classStaticPrivateFieldDestructureSet(receiver, classConstructor, descriptor) {
    _classCheckPrivateStaticAccess(receiver, classConstructor);
    _classCheckPrivateStaticFieldDescriptor(descriptor, "set");
    return _classApplyDescriptorDestructureSet(receiver, descriptor);
  }
  function _classCheckPrivateStaticAccess(receiver, classConstructor) {
    if (receiver !== classConstructor) {
      throw new TypeError("Private static access of wrong provenance");
    }
  }
  function _classCheckPrivateStaticFieldDescriptor(descriptor, action) {
    if (descriptor === undefined) {
      throw new TypeError("attempted to " + action + " private static field before its declaration");
    }
  }
  function _decorate(decorators, factory, superClass, mixins) {
    var api = _getDecoratorsApi();
    if (mixins) {
      for (var i = 0; i < mixins.length; i++) {
        api = mixins[i](api);
      }
    }
    var r = factory(function initialize(O) {
      api.initializeInstanceElements(O, decorated.elements);
    }, superClass);
    var decorated = api.decorateClass(_coalesceClassElements(r.d.map(_createElementDescriptor)), decorators);
    api.initializeClassElements(r.F, decorated.elements);
    return api.runClassFinishers(r.F, decorated.finishers);
  }
  function _getDecoratorsApi() {
    _getDecoratorsApi = function () {
      return api;
    };
    var api = {
      elementsDefinitionOrder: [["method"], ["field"]],
      initializeInstanceElements: function (O, elements) {
        ["method", "field"].forEach(function (kind) {
          elements.forEach(function (element) {
            if (element.kind === kind && element.placement === "own") {
              this.defineClassElement(O, element);
            }
          }, this);
        }, this);
      },
      initializeClassElements: function (F, elements) {
        var proto = F.prototype;
        ["method", "field"].forEach(function (kind) {
          elements.forEach(function (element) {
            var placement = element.placement;
            if (element.kind === kind && (placement === "static" || placement === "prototype")) {
              var receiver = placement === "static" ? F : proto;
              this.defineClassElement(receiver, element);
            }
          }, this);
        }, this);
      },
      defineClassElement: function (receiver, element) {
        var descriptor = element.descriptor;
        if (element.kind === "field") {
          var initializer = element.initializer;
          descriptor = {
            enumerable: descriptor.enumerable,
            writable: descriptor.writable,
            configurable: descriptor.configurable,
            value: initializer === void 0 ? void 0 : initializer.call(receiver)
          };
        }
        Object.defineProperty(receiver, element.key, descriptor);
      },
      decorateClass: function (elements, decorators) {
        var newElements = [];
        var finishers = [];
        var placements = {
          static: [],
          prototype: [],
          own: []
        };
        elements.forEach(function (element) {
          this.addElementPlacement(element, placements);
        }, this);
        elements.forEach(function (element) {
          if (!_hasDecorators(element)) return newElements.push(element);
          var elementFinishersExtras = this.decorateElement(element, placements);
          newElements.push(elementFinishersExtras.element);
          newElements.push.apply(newElements, elementFinishersExtras.extras);
          finishers.push.apply(finishers, elementFinishersExtras.finishers);
        }, this);
        if (!decorators) {
          return {
            elements: newElements,
            finishers: finishers
          };
        }
        var result = this.decorateConstructor(newElements, decorators);
        finishers.push.apply(finishers, result.finishers);
        result.finishers = finishers;
        return result;
      },
      addElementPlacement: function (element, placements, silent) {
        var keys = placements[element.placement];
        if (!silent && keys.indexOf(element.key) !== -1) {
          throw new TypeError("Duplicated element (" + element.key + ")");
        }
        keys.push(element.key);
      },
      decorateElement: function (element, placements) {
        var extras = [];
        var finishers = [];
        for (var decorators = element.decorators, i = decorators.length - 1; i >= 0; i--) {
          var keys = placements[element.placement];
          keys.splice(keys.indexOf(element.key), 1);
          var elementObject = this.fromElementDescriptor(element);
          var elementFinisherExtras = this.toElementFinisherExtras((0, decorators[i])(elementObject) || elementObject);
          element = elementFinisherExtras.element;
          this.addElementPlacement(element, placements);
          if (elementFinisherExtras.finisher) {
            finishers.push(elementFinisherExtras.finisher);
          }
          var newExtras = elementFinisherExtras.extras;
          if (newExtras) {
            for (var j = 0; j < newExtras.length; j++) {
              this.addElementPlacement(newExtras[j], placements);
            }
            extras.push.apply(extras, newExtras);
          }
        }
        return {
          element: element,
          finishers: finishers,
          extras: extras
        };
      },
      decorateConstructor: function (elements, decorators) {
        var finishers = [];
        for (var i = decorators.length - 1; i >= 0; i--) {
          var obj = this.fromClassDescriptor(elements);
          var elementsAndFinisher = this.toClassDescriptor((0, decorators[i])(obj) || obj);
          if (elementsAndFinisher.finisher !== undefined) {
            finishers.push(elementsAndFinisher.finisher);
          }
          if (elementsAndFinisher.elements !== undefined) {
            elements = elementsAndFinisher.elements;
            for (var j = 0; j < elements.length - 1; j++) {
              for (var k = j + 1; k < elements.length; k++) {
                if (elements[j].key === elements[k].key && elements[j].placement === elements[k].placement) {
                  throw new TypeError("Duplicated element (" + elements[j].key + ")");
                }
              }
            }
          }
        }
        return {
          elements: elements,
          finishers: finishers
        };
      },
      fromElementDescriptor: function (element) {
        var obj = {
          kind: element.kind,
          key: element.key,
          placement: element.placement,
          descriptor: element.descriptor
        };
        var desc = {
          value: "Descriptor",
          configurable: true
        };
        Object.defineProperty(obj, Symbol.toStringTag, desc);
        if (element.kind === "field") obj.initializer = element.initializer;
        return obj;
      },
      toElementDescriptors: function (elementObjects) {
        if (elementObjects === undefined) return;
        return _toArray(elementObjects).map(function (elementObject) {
          var element = this.toElementDescriptor(elementObject);
          this.disallowProperty(elementObject, "finisher", "An element descriptor");
          this.disallowProperty(elementObject, "extras", "An element descriptor");
          return element;
        }, this);
      },
      toElementDescriptor: function (elementObject) {
        var kind = String(elementObject.kind);
        if (kind !== "method" && kind !== "field") {
          throw new TypeError('An element descriptor\'s .kind property must be either "method" or' + ' "field", but a decorator created an element descriptor with' + ' .kind "' + kind + '"');
        }
        var key = _toPropertyKey(elementObject.key);
        var placement = String(elementObject.placement);
        if (placement !== "static" && placement !== "prototype" && placement !== "own") {
          throw new TypeError('An element descriptor\'s .placement property must be one of "static",' + ' "prototype" or "own", but a decorator created an element descriptor' + ' with .placement "' + placement + '"');
        }
        var descriptor = elementObject.descriptor;
        this.disallowProperty(elementObject, "elements", "An element descriptor");
        var element = {
          kind: kind,
          key: key,
          placement: placement,
          descriptor: Object.assign({}, descriptor)
        };
        if (kind !== "field") {
          this.disallowProperty(elementObject, "initializer", "A method descriptor");
        } else {
          this.disallowProperty(descriptor, "get", "The property descriptor of a field descriptor");
          this.disallowProperty(descriptor, "set", "The property descriptor of a field descriptor");
          this.disallowProperty(descriptor, "value", "The property descriptor of a field descriptor");
          element.initializer = elementObject.initializer;
        }
        return element;
      },
      toElementFinisherExtras: function (elementObject) {
        var element = this.toElementDescriptor(elementObject);
        var finisher = _optionalCallableProperty(elementObject, "finisher");
        var extras = this.toElementDescriptors(elementObject.extras);
        return {
          element: element,
          finisher: finisher,
          extras: extras
        };
      },
      fromClassDescriptor: function (elements) {
        var obj = {
          kind: "class",
          elements: elements.map(this.fromElementDescriptor, this)
        };
        var desc = {
          value: "Descriptor",
          configurable: true
        };
        Object.defineProperty(obj, Symbol.toStringTag, desc);
        return obj;
      },
      toClassDescriptor: function (obj) {
        var kind = String(obj.kind);
        if (kind !== "class") {
          throw new TypeError('A class descriptor\'s .kind property must be "class", but a decorator' + ' created a class descriptor with .kind "' + kind + '"');
        }
        this.disallowProperty(obj, "key", "A class descriptor");
        this.disallowProperty(obj, "placement", "A class descriptor");
        this.disallowProperty(obj, "descriptor", "A class descriptor");
        this.disallowProperty(obj, "initializer", "A class descriptor");
        this.disallowProperty(obj, "extras", "A class descriptor");
        var finisher = _optionalCallableProperty(obj, "finisher");
        var elements = this.toElementDescriptors(obj.elements);
        return {
          elements: elements,
          finisher: finisher
        };
      },
      runClassFinishers: function (constructor, finishers) {
        for (var i = 0; i < finishers.length; i++) {
          var newConstructor = (0, finishers[i])(constructor);
          if (newConstructor !== undefined) {
            if (typeof newConstructor !== "function") {
              throw new TypeError("Finishers must return a constructor.");
            }
            constructor = newConstructor;
          }
        }
        return constructor;
      },
      disallowProperty: function (obj, name, objectType) {
        if (obj[name] !== undefined) {
          throw new TypeError(objectType + " can't have a ." + name + " property.");
        }
      }
    };
    return api;
  }
  function _createElementDescriptor(def) {
    var key = _toPropertyKey(def.key);
    var descriptor;
    if (def.kind === "method") {
      descriptor = {
        value: def.value,
        writable: true,
        configurable: true,
        enumerable: false
      };
    } else if (def.kind === "get") {
      descriptor = {
        get: def.value,
        configurable: true,
        enumerable: false
      };
    } else if (def.kind === "set") {
      descriptor = {
        set: def.value,
        configurable: true,
        enumerable: false
      };
    } else if (def.kind === "field") {
      descriptor = {
        configurable: true,
        writable: true,
        enumerable: true
      };
    }
    var element = {
      kind: def.kind === "field" ? "field" : "method",
      key: key,
      placement: def.static ? "static" : def.kind === "field" ? "own" : "prototype",
      descriptor: descriptor
    };
    if (def.decorators) element.decorators = def.decorators;
    if (def.kind === "field") element.initializer = def.value;
    return element;
  }
  function _coalesceGetterSetter(element, other) {
    if (element.descriptor.get !== undefined) {
      other.descriptor.get = element.descriptor.get;
    } else {
      other.descriptor.set = element.descriptor.set;
    }
  }
  function _coalesceClassElements(elements) {
    var newElements = [];
    var isSameElement = function (other) {
      return other.kind === "method" && other.key === element.key && other.placement === element.placement;
    };
    for (var i = 0; i < elements.length; i++) {
      var element = elements[i];
      var other;
      if (element.kind === "method" && (other = newElements.find(isSameElement))) {
        if (_isDataDescriptor(element.descriptor) || _isDataDescriptor(other.descriptor)) {
          if (_hasDecorators(element) || _hasDecorators(other)) {
            throw new ReferenceError("Duplicated methods (" + element.key + ") can't be decorated.");
          }
          other.descriptor = element.descriptor;
        } else {
          if (_hasDecorators(element)) {
            if (_hasDecorators(other)) {
              throw new ReferenceError("Decorators can't be placed on different accessors with for " + "the same property (" + element.key + ").");
            }
            other.decorators = element.decorators;
          }
          _coalesceGetterSetter(element, other);
        }
      } else {
        newElements.push(element);
      }
    }
    return newElements;
  }
  function _hasDecorators(element) {
    return element.decorators && element.decorators.length;
  }
  function _isDataDescriptor(desc) {
    return desc !== undefined && !(desc.value === undefined && desc.writable === undefined);
  }
  function _optionalCallableProperty(obj, name) {
    var value = obj[name];
    if (value !== undefined && typeof value !== "function") {
      throw new TypeError("Expected '" + name + "' to be a function");
    }
    return value;
  }
  function _classPrivateMethodGet(receiver, privateSet, fn) {
    if (!privateSet.has(receiver)) {
      throw new TypeError("attempted to get private field on non-instance");
    }
    return fn;
  }
  function _checkPrivateRedeclaration(obj, privateCollection) {
    if (privateCollection.has(obj)) {
      throw new TypeError("Cannot initialize the same private elements twice on an object");
    }
  }
  function _classPrivateFieldInitSpec(obj, privateMap, value) {
    _checkPrivateRedeclaration(obj, privateMap);
    privateMap.set(obj, value);
  }
  function _classPrivateMethodInitSpec(obj, privateSet) {
    _checkPrivateRedeclaration(obj, privateSet);
    privateSet.add(obj);
  }
  function _classPrivateMethodSet() {
    throw new TypeError("attempted to reassign private method");
  }
  function _identity(x) {
    return x;
  }
  function _nullishReceiverError(r) {
    throw new TypeError("Cannot set property of null or undefined.");
  }

  class Piece extends TrixObject {
    static registerType(type, constructor) {
      constructor.type = type;
      this.types[type] = constructor;
    }
    static fromJSON(pieceJSON) {
      const constructor = this.types[pieceJSON.type];
      if (constructor) {
        return constructor.fromJSON(pieceJSON);
      }
    }
    constructor(value) {
      let attributes = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      super(...arguments);
      this.attributes = Hash.box(attributes);
    }
    copyWithAttributes(attributes) {
      return new this.constructor(this.getValue(), attributes);
    }
    copyWithAdditionalAttributes(attributes) {
      return this.copyWithAttributes(this.attributes.merge(attributes));
    }
    copyWithoutAttribute(attribute) {
      return this.copyWithAttributes(this.attributes.remove(attribute));
    }
    copy() {
      return this.copyWithAttributes(this.attributes);
    }
    getAttribute(attribute) {
      return this.attributes.get(attribute);
    }
    getAttributesHash() {
      return this.attributes;
    }
    getAttributes() {
      return this.attributes.toObject();
    }
    hasAttribute(attribute) {
      return this.attributes.has(attribute);
    }
    hasSameStringValueAsPiece(piece) {
      return piece && this.toString() === piece.toString();
    }
    hasSameAttributesAsPiece(piece) {
      return piece && (this.attributes === piece.attributes || this.attributes.isEqualTo(piece.attributes));
    }
    isBlockBreak() {
      return false;
    }
    isEqualTo(piece) {
      return super.isEqualTo(...arguments) || this.hasSameConstructorAs(piece) && this.hasSameStringValueAsPiece(piece) && this.hasSameAttributesAsPiece(piece);
    }
    isEmpty() {
      return this.length === 0;
    }
    isSerializable() {
      return true;
    }
    toJSON() {
      return {
        type: this.constructor.type,
        attributes: this.getAttributes()
      };
    }
    contentsForInspection() {
      return {
        type: this.constructor.type,
        attributes: this.attributes.inspect()
      };
    }

    // Grouping

    canBeGrouped() {
      return this.hasAttribute("href");
    }
    canBeGroupedWith(piece) {
      return this.getAttribute("href") === piece.getAttribute("href");
    }

    // Splittable

    getLength() {
      return this.length;
    }
    canBeConsolidatedWith(piece) {
      return false;
    }
  }
  _defineProperty(Piece, "types", {});

  class ImagePreloadOperation extends Operation {
    constructor(url) {
      super(...arguments);
      this.url = url;
    }
    perform(callback) {
      const image = new Image();
      image.onload = () => {
        image.width = this.width = image.naturalWidth;
        image.height = this.height = image.naturalHeight;
        return callback(true, image);
      };
      image.onerror = () => callback(false);
      image.src = this.url;
    }
  }

  class Attachment extends TrixObject {
    static attachmentForFile(file) {
      const attributes = this.attributesForFile(file);
      const attachment = new this(attributes);
      attachment.setFile(file);
      return attachment;
    }
    static attributesForFile(file) {
      return new Hash({
        filename: file.name,
        filesize: file.size,
        contentType: file.type
      });
    }
    static fromJSON(attachmentJSON) {
      return new this(attachmentJSON);
    }
    constructor() {
      let attributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      super(attributes);
      this.releaseFile = this.releaseFile.bind(this);
      this.attributes = Hash.box(attributes);
      this.didChangeAttributes();
    }
    getAttribute(attribute) {
      return this.attributes.get(attribute);
    }
    hasAttribute(attribute) {
      return this.attributes.has(attribute);
    }
    getAttributes() {
      return this.attributes.toObject();
    }
    setAttributes() {
      let attributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      const newAttributes = this.attributes.merge(attributes);
      if (!this.attributes.isEqualTo(newAttributes)) {
        var _this$previewDelegate, _this$previewDelegate2, _this$delegate, _this$delegate$attach;
        this.attributes = newAttributes;
        this.didChangeAttributes();
        (_this$previewDelegate = this.previewDelegate) === null || _this$previewDelegate === void 0 || (_this$previewDelegate2 = _this$previewDelegate.attachmentDidChangeAttributes) === null || _this$previewDelegate2 === void 0 || _this$previewDelegate2.call(_this$previewDelegate, this);
        return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$attach = _this$delegate.attachmentDidChangeAttributes) === null || _this$delegate$attach === void 0 ? void 0 : _this$delegate$attach.call(_this$delegate, this);
      }
    }
    didChangeAttributes() {
      if (this.isPreviewable()) {
        return this.preloadURL();
      }
    }
    isPending() {
      return this.file != null && !(this.getURL() || this.getHref());
    }
    isPreviewable() {
      if (this.attributes.has("previewable")) {
        return this.attributes.get("previewable");
      } else {
        return Attachment.previewablePattern.test(this.getContentType());
      }
    }
    getType() {
      if (this.hasContent()) {
        return "content";
      } else if (this.isPreviewable()) {
        return "preview";
      } else {
        return "file";
      }
    }
    getURL() {
      return this.attributes.get("url");
    }
    getHref() {
      return this.attributes.get("href");
    }
    getFilename() {
      return this.attributes.get("filename") || "";
    }
    getFilesize() {
      return this.attributes.get("filesize");
    }
    getFormattedFilesize() {
      const filesize = this.attributes.get("filesize");
      if (typeof filesize === "number") {
        return file_size_formatting.formatter(filesize);
      } else {
        return "";
      }
    }
    getExtension() {
      var _this$getFilename$mat;
      return (_this$getFilename$mat = this.getFilename().match(/\.(\w+)$/)) === null || _this$getFilename$mat === void 0 ? void 0 : _this$getFilename$mat[1].toLowerCase();
    }
    getContentType() {
      return this.attributes.get("contentType");
    }
    hasContent() {
      return this.attributes.has("content");
    }
    getContent() {
      return this.attributes.get("content");
    }
    getWidth() {
      return this.attributes.get("width");
    }
    getHeight() {
      return this.attributes.get("height");
    }
    getFile() {
      return this.file;
    }
    setFile(file) {
      this.file = file;
      if (this.isPreviewable()) {
        return this.preloadFile();
      }
    }
    releaseFile() {
      this.releasePreloadedFile();
      this.file = null;
    }
    getUploadProgress() {
      return this.uploadProgress != null ? this.uploadProgress : 0;
    }
    setUploadProgress(value) {
      if (this.uploadProgress !== value) {
        var _this$uploadProgressD, _this$uploadProgressD2;
        this.uploadProgress = value;
        return (_this$uploadProgressD = this.uploadProgressDelegate) === null || _this$uploadProgressD === void 0 || (_this$uploadProgressD2 = _this$uploadProgressD.attachmentDidChangeUploadProgress) === null || _this$uploadProgressD2 === void 0 ? void 0 : _this$uploadProgressD2.call(_this$uploadProgressD, this);
      }
    }
    toJSON() {
      return this.getAttributes();
    }
    getCacheKey() {
      return [super.getCacheKey(...arguments), this.attributes.getCacheKey(), this.getPreviewURL()].join("/");
    }

    // Previewable

    getPreviewURL() {
      return this.previewURL || this.preloadingURL;
    }
    setPreviewURL(url) {
      if (url !== this.getPreviewURL()) {
        var _this$previewDelegate3, _this$previewDelegate4, _this$delegate2, _this$delegate2$attac;
        this.previewURL = url;
        (_this$previewDelegate3 = this.previewDelegate) === null || _this$previewDelegate3 === void 0 || (_this$previewDelegate4 = _this$previewDelegate3.attachmentDidChangeAttributes) === null || _this$previewDelegate4 === void 0 || _this$previewDelegate4.call(_this$previewDelegate3, this);
        return (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || (_this$delegate2$attac = _this$delegate2.attachmentDidChangePreviewURL) === null || _this$delegate2$attac === void 0 ? void 0 : _this$delegate2$attac.call(_this$delegate2, this);
      }
    }
    preloadURL() {
      return this.preload(this.getURL(), this.releaseFile);
    }
    preloadFile() {
      if (this.file) {
        this.fileObjectURL = URL.createObjectURL(this.file);
        return this.preload(this.fileObjectURL);
      }
    }
    releasePreloadedFile() {
      if (this.fileObjectURL) {
        URL.revokeObjectURL(this.fileObjectURL);
        this.fileObjectURL = null;
      }
    }
    preload(url, callback) {
      if (url && url !== this.getPreviewURL()) {
        this.preloadingURL = url;
        const operation = new ImagePreloadOperation(url);
        return operation.then(_ref => {
          let {
            width,
            height
          } = _ref;
          if (!this.getWidth() || !this.getHeight()) {
            this.setAttributes({
              width,
              height
            });
          }
          this.preloadingURL = null;
          this.setPreviewURL(url);
          return callback === null || callback === void 0 ? void 0 : callback();
        }).catch(() => {
          this.preloadingURL = null;
          return callback === null || callback === void 0 ? void 0 : callback();
        });
      }
    }
  }
  _defineProperty(Attachment, "previewablePattern", /^image(\/(gif|png|webp|jpe?g)|$)/);

  class AttachmentPiece extends Piece {
    static fromJSON(pieceJSON) {
      return new this(Attachment.fromJSON(pieceJSON.attachment), pieceJSON.attributes);
    }
    constructor(attachment) {
      super(...arguments);
      this.attachment = attachment;
      this.length = 1;
      this.ensureAttachmentExclusivelyHasAttribute("href");
      if (!this.attachment.hasContent()) {
        this.removeProhibitedAttributes();
      }
    }
    ensureAttachmentExclusivelyHasAttribute(attribute) {
      if (this.hasAttribute(attribute)) {
        if (!this.attachment.hasAttribute(attribute)) {
          this.attachment.setAttributes(this.attributes.slice([attribute]));
        }
        this.attributes = this.attributes.remove(attribute);
      }
    }
    removeProhibitedAttributes() {
      const attributes = this.attributes.slice(AttachmentPiece.permittedAttributes);
      if (!attributes.isEqualTo(this.attributes)) {
        this.attributes = attributes;
      }
    }
    getValue() {
      return this.attachment;
    }
    isSerializable() {
      return !this.attachment.isPending();
    }
    getCaption() {
      return this.attributes.get("caption") || "";
    }
    isEqualTo(piece) {
      var _piece$attachment;
      return super.isEqualTo(piece) && this.attachment.id === (piece === null || piece === void 0 || (_piece$attachment = piece.attachment) === null || _piece$attachment === void 0 ? void 0 : _piece$attachment.id);
    }
    toString() {
      return OBJECT_REPLACEMENT_CHARACTER;
    }
    toJSON() {
      const json = super.toJSON(...arguments);
      json.attachment = this.attachment;
      return json;
    }
    getCacheKey() {
      return [super.getCacheKey(...arguments), this.attachment.getCacheKey()].join("/");
    }
    toConsole() {
      return JSON.stringify(this.toString());
    }
  }
  _defineProperty(AttachmentPiece, "permittedAttributes", ["caption", "presentation"]);
  Piece.registerType("attachment", AttachmentPiece);

  class StringPiece extends Piece {
    static fromJSON(pieceJSON) {
      return new this(pieceJSON.string, pieceJSON.attributes);
    }
    constructor(string) {
      super(...arguments);
      this.string = normalizeNewlines(string);
      this.length = this.string.length;
    }
    getValue() {
      return this.string;
    }
    toString() {
      return this.string.toString();
    }
    isBlockBreak() {
      return this.toString() === "\n" && this.getAttribute("blockBreak") === true;
    }
    toJSON() {
      const result = super.toJSON(...arguments);
      result.string = this.string;
      return result;
    }

    // Splittable

    canBeConsolidatedWith(piece) {
      return piece && this.hasSameConstructorAs(piece) && this.hasSameAttributesAsPiece(piece);
    }
    consolidateWith(piece) {
      return new this.constructor(this.toString() + piece.toString(), this.attributes);
    }
    splitAtOffset(offset) {
      let left, right;
      if (offset === 0) {
        left = null;
        right = this;
      } else if (offset === this.length) {
        left = this;
        right = null;
      } else {
        left = new this.constructor(this.string.slice(0, offset), this.attributes);
        right = new this.constructor(this.string.slice(offset), this.attributes);
      }
      return [left, right];
    }
    toConsole() {
      let {
        string
      } = this;
      if (string.length > 15) {
        string = string.slice(0, 14) + "…";
      }
      return JSON.stringify(string.toString());
    }
  }
  Piece.registerType("string", StringPiece);

  /* eslint-disable
      prefer-const,
  */
  class SplittableList extends TrixObject {
    static box(objects) {
      if (objects instanceof this) {
        return objects;
      } else {
        return new this(objects);
      }
    }
    constructor() {
      let objects = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      super(...arguments);
      this.objects = objects.slice(0);
      this.length = this.objects.length;
    }
    indexOf(object) {
      return this.objects.indexOf(object);
    }
    splice() {
      for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
        args[_key] = arguments[_key];
      }
      return new this.constructor(spliceArray(this.objects, ...args));
    }
    eachObject(callback) {
      return this.objects.map((object, index) => callback(object, index));
    }
    insertObjectAtIndex(object, index) {
      return this.splice(index, 0, object);
    }
    insertSplittableListAtIndex(splittableList, index) {
      return this.splice(index, 0, ...splittableList.objects);
    }
    insertSplittableListAtPosition(splittableList, position) {
      const [objects, index] = this.splitObjectAtPosition(position);
      return new this.constructor(objects).insertSplittableListAtIndex(splittableList, index);
    }
    editObjectAtIndex(index, callback) {
      return this.replaceObjectAtIndex(callback(this.objects[index]), index);
    }
    replaceObjectAtIndex(object, index) {
      return this.splice(index, 1, object);
    }
    removeObjectAtIndex(index) {
      return this.splice(index, 1);
    }
    getObjectAtIndex(index) {
      return this.objects[index];
    }
    getSplittableListInRange(range) {
      const [objects, leftIndex, rightIndex] = this.splitObjectsAtRange(range);
      return new this.constructor(objects.slice(leftIndex, rightIndex + 1));
    }
    selectSplittableList(test) {
      const objects = this.objects.filter(object => test(object));
      return new this.constructor(objects);
    }
    removeObjectsInRange(range) {
      const [objects, leftIndex, rightIndex] = this.splitObjectsAtRange(range);
      return new this.constructor(objects).splice(leftIndex, rightIndex - leftIndex + 1);
    }
    transformObjectsInRange(range, transform) {
      const [objects, leftIndex, rightIndex] = this.splitObjectsAtRange(range);
      const transformedObjects = objects.map((object, index) => leftIndex <= index && index <= rightIndex ? transform(object) : object);
      return new this.constructor(transformedObjects);
    }
    splitObjectsAtRange(range) {
      let rightOuterIndex;
      let [objects, leftInnerIndex, offset] = this.splitObjectAtPosition(startOfRange(range));
      [objects, rightOuterIndex] = new this.constructor(objects).splitObjectAtPosition(endOfRange(range) + offset);
      return [objects, leftInnerIndex, rightOuterIndex - 1];
    }
    getObjectAtPosition(position) {
      const {
        index
      } = this.findIndexAndOffsetAtPosition(position);
      return this.objects[index];
    }
    splitObjectAtPosition(position) {
      let splitIndex, splitOffset;
      const {
        index,
        offset
      } = this.findIndexAndOffsetAtPosition(position);
      const objects = this.objects.slice(0);
      if (index != null) {
        if (offset === 0) {
          splitIndex = index;
          splitOffset = 0;
        } else {
          const object = this.getObjectAtIndex(index);
          const [leftObject, rightObject] = object.splitAtOffset(offset);
          objects.splice(index, 1, leftObject, rightObject);
          splitIndex = index + 1;
          splitOffset = leftObject.getLength() - offset;
        }
      } else {
        splitIndex = objects.length;
        splitOffset = 0;
      }
      return [objects, splitIndex, splitOffset];
    }
    consolidate() {
      const objects = [];
      let pendingObject = this.objects[0];
      this.objects.slice(1).forEach(object => {
        var _pendingObject$canBeC, _pendingObject;
        if ((_pendingObject$canBeC = (_pendingObject = pendingObject).canBeConsolidatedWith) !== null && _pendingObject$canBeC !== void 0 && _pendingObject$canBeC.call(_pendingObject, object)) {
          pendingObject = pendingObject.consolidateWith(object);
        } else {
          objects.push(pendingObject);
          pendingObject = object;
        }
      });
      if (pendingObject) {
        objects.push(pendingObject);
      }
      return new this.constructor(objects);
    }
    consolidateFromIndexToIndex(startIndex, endIndex) {
      const objects = this.objects.slice(0);
      const objectsInRange = objects.slice(startIndex, endIndex + 1);
      const consolidatedInRange = new this.constructor(objectsInRange).consolidate().toArray();
      return this.splice(startIndex, objectsInRange.length, ...consolidatedInRange);
    }
    findIndexAndOffsetAtPosition(position) {
      let index;
      let currentPosition = 0;
      for (index = 0; index < this.objects.length; index++) {
        const object = this.objects[index];
        const nextPosition = currentPosition + object.getLength();
        if (currentPosition <= position && position < nextPosition) {
          return {
            index,
            offset: position - currentPosition
          };
        }
        currentPosition = nextPosition;
      }
      return {
        index: null,
        offset: null
      };
    }
    findPositionAtIndexAndOffset(index, offset) {
      let position = 0;
      for (let currentIndex = 0; currentIndex < this.objects.length; currentIndex++) {
        const object = this.objects[currentIndex];
        if (currentIndex < index) {
          position += object.getLength();
        } else if (currentIndex === index) {
          position += offset;
          break;
        }
      }
      return position;
    }
    getEndPosition() {
      if (this.endPosition == null) {
        this.endPosition = 0;
        this.objects.forEach(object => this.endPosition += object.getLength());
      }
      return this.endPosition;
    }
    toString() {
      return this.objects.join("");
    }
    toArray() {
      return this.objects.slice(0);
    }
    toJSON() {
      return this.toArray();
    }
    isEqualTo(splittableList) {
      return super.isEqualTo(...arguments) || objectArraysAreEqual(this.objects, splittableList === null || splittableList === void 0 ? void 0 : splittableList.objects);
    }
    contentsForInspection() {
      return {
        objects: "[".concat(this.objects.map(object => object.inspect()).join(", "), "]")
      };
    }
  }
  const objectArraysAreEqual = function (left) {
    let right = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
    if (left.length !== right.length) {
      return false;
    }
    let result = true;
    for (let index = 0; index < left.length; index++) {
      const object = left[index];
      if (result && !object.isEqualTo(right[index])) {
        result = false;
      }
    }
    return result;
  };
  const startOfRange = range => range[0];
  const endOfRange = range => range[1];

  class Text extends TrixObject {
    static textForAttachmentWithAttributes(attachment, attributes) {
      const piece = new AttachmentPiece(attachment, attributes);
      return new this([piece]);
    }
    static textForStringWithAttributes(string, attributes) {
      const piece = new StringPiece(string, attributes);
      return new this([piece]);
    }
    static fromJSON(textJSON) {
      const pieces = Array.from(textJSON).map(pieceJSON => Piece.fromJSON(pieceJSON));
      return new this(pieces);
    }
    constructor() {
      let pieces = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      super(...arguments);
      const notEmpty = pieces.filter(piece => !piece.isEmpty());
      this.pieceList = new SplittableList(notEmpty);
    }
    copy() {
      return this.copyWithPieceList(this.pieceList);
    }
    copyWithPieceList(pieceList) {
      return new this.constructor(pieceList.consolidate().toArray());
    }
    copyUsingObjectMap(objectMap) {
      const pieces = this.getPieces().map(piece => objectMap.find(piece) || piece);
      return new this.constructor(pieces);
    }
    appendText(text) {
      return this.insertTextAtPosition(text, this.getLength());
    }
    insertTextAtPosition(text, position) {
      return this.copyWithPieceList(this.pieceList.insertSplittableListAtPosition(text.pieceList, position));
    }
    removeTextAtRange(range) {
      return this.copyWithPieceList(this.pieceList.removeObjectsInRange(range));
    }
    replaceTextAtRange(text, range) {
      return this.removeTextAtRange(range).insertTextAtPosition(text, range[0]);
    }
    moveTextFromRangeToPosition(range, position) {
      if (range[0] <= position && position <= range[1]) return;
      const text = this.getTextAtRange(range);
      const length = text.getLength();
      if (range[0] < position) {
        position -= length;
      }
      return this.removeTextAtRange(range).insertTextAtPosition(text, position);
    }
    addAttributeAtRange(attribute, value, range) {
      const attributes = {};
      attributes[attribute] = value;
      return this.addAttributesAtRange(attributes, range);
    }
    addAttributesAtRange(attributes, range) {
      return this.copyWithPieceList(this.pieceList.transformObjectsInRange(range, piece => piece.copyWithAdditionalAttributes(attributes)));
    }
    removeAttributeAtRange(attribute, range) {
      return this.copyWithPieceList(this.pieceList.transformObjectsInRange(range, piece => piece.copyWithoutAttribute(attribute)));
    }
    setAttributesAtRange(attributes, range) {
      return this.copyWithPieceList(this.pieceList.transformObjectsInRange(range, piece => piece.copyWithAttributes(attributes)));
    }
    getAttributesAtPosition(position) {
      var _this$pieceList$getOb;
      return ((_this$pieceList$getOb = this.pieceList.getObjectAtPosition(position)) === null || _this$pieceList$getOb === void 0 ? void 0 : _this$pieceList$getOb.getAttributes()) || {};
    }
    getCommonAttributes() {
      const objects = Array.from(this.pieceList.toArray()).map(piece => piece.getAttributes());
      return Hash.fromCommonAttributesOfObjects(objects).toObject();
    }
    getCommonAttributesAtRange(range) {
      return this.getTextAtRange(range).getCommonAttributes() || {};
    }
    getExpandedRangeForAttributeAtOffset(attributeName, offset) {
      let right;
      let left = right = offset;
      const length = this.getLength();
      while (left > 0 && this.getCommonAttributesAtRange([left - 1, right])[attributeName]) {
        left--;
      }
      while (right < length && this.getCommonAttributesAtRange([offset, right + 1])[attributeName]) {
        right++;
      }
      return [left, right];
    }
    getTextAtRange(range) {
      return this.copyWithPieceList(this.pieceList.getSplittableListInRange(range));
    }
    getStringAtRange(range) {
      return this.pieceList.getSplittableListInRange(range).toString();
    }
    getStringAtPosition(position) {
      return this.getStringAtRange([position, position + 1]);
    }
    startsWithString(string) {
      return this.getStringAtRange([0, string.length]) === string;
    }
    endsWithString(string) {
      const length = this.getLength();
      return this.getStringAtRange([length - string.length, length]) === string;
    }
    getAttachmentPieces() {
      return this.pieceList.toArray().filter(piece => !!piece.attachment);
    }
    getAttachments() {
      return this.getAttachmentPieces().map(piece => piece.attachment);
    }
    getAttachmentAndPositionById(attachmentId) {
      let position = 0;
      for (const piece of this.pieceList.toArray()) {
        var _piece$attachment;
        if (((_piece$attachment = piece.attachment) === null || _piece$attachment === void 0 ? void 0 : _piece$attachment.id) === attachmentId) {
          return {
            attachment: piece.attachment,
            position
          };
        }
        position += piece.length;
      }
      return {
        attachment: null,
        position: null
      };
    }
    getAttachmentById(attachmentId) {
      const {
        attachment
      } = this.getAttachmentAndPositionById(attachmentId);
      return attachment;
    }
    getRangeOfAttachment(attachment) {
      const attachmentAndPosition = this.getAttachmentAndPositionById(attachment.id);
      const position = attachmentAndPosition.position;
      attachment = attachmentAndPosition.attachment;
      if (attachment) {
        return [position, position + 1];
      }
    }
    updateAttributesForAttachment(attributes, attachment) {
      const range = this.getRangeOfAttachment(attachment);
      if (range) {
        return this.addAttributesAtRange(attributes, range);
      } else {
        return this;
      }
    }
    getLength() {
      return this.pieceList.getEndPosition();
    }
    isEmpty() {
      return this.getLength() === 0;
    }
    isEqualTo(text) {
      var _text$pieceList;
      return super.isEqualTo(text) || (text === null || text === void 0 || (_text$pieceList = text.pieceList) === null || _text$pieceList === void 0 ? void 0 : _text$pieceList.isEqualTo(this.pieceList));
    }
    isBlockBreak() {
      return this.getLength() === 1 && this.pieceList.getObjectAtIndex(0).isBlockBreak();
    }
    eachPiece(callback) {
      return this.pieceList.eachObject(callback);
    }
    getPieces() {
      return this.pieceList.toArray();
    }
    getPieceAtPosition(position) {
      return this.pieceList.getObjectAtPosition(position);
    }
    contentsForInspection() {
      return {
        pieceList: this.pieceList.inspect()
      };
    }
    toSerializableText() {
      const pieceList = this.pieceList.selectSplittableList(piece => piece.isSerializable());
      return this.copyWithPieceList(pieceList);
    }
    toString() {
      return this.pieceList.toString();
    }
    toJSON() {
      return this.pieceList.toJSON();
    }
    toConsole() {
      return JSON.stringify(this.pieceList.toArray().map(piece => JSON.parse(piece.toConsole())));
    }

    // BIDI

    getDirection() {
      return getDirection(this.toString());
    }
    isRTL() {
      return this.getDirection() === "rtl";
    }
  }

  class Block extends TrixObject {
    static fromJSON(blockJSON) {
      const text = Text.fromJSON(blockJSON.text);
      return new this(text, blockJSON.attributes, blockJSON.htmlAttributes);
    }
    constructor(text, attributes, htmlAttributes) {
      super(...arguments);
      this.text = applyBlockBreakToText(text || new Text());
      this.attributes = attributes || [];
      this.htmlAttributes = htmlAttributes || {};
    }
    isEmpty() {
      return this.text.isBlockBreak();
    }
    isEqualTo(block) {
      if (super.isEqualTo(block)) return true;
      return this.text.isEqualTo(block === null || block === void 0 ? void 0 : block.text) && arraysAreEqual(this.attributes, block === null || block === void 0 ? void 0 : block.attributes) && objectsAreEqual(this.htmlAttributes, block === null || block === void 0 ? void 0 : block.htmlAttributes);
    }
    copyWithText(text) {
      return new Block(text, this.attributes, this.htmlAttributes);
    }
    copyWithoutText() {
      return this.copyWithText(null);
    }
    copyWithAttributes(attributes) {
      return new Block(this.text, attributes, this.htmlAttributes);
    }
    copyWithoutAttributes() {
      return this.copyWithAttributes(null);
    }
    copyUsingObjectMap(objectMap) {
      const mappedText = objectMap.find(this.text);
      if (mappedText) {
        return this.copyWithText(mappedText);
      } else {
        return this.copyWithText(this.text.copyUsingObjectMap(objectMap));
      }
    }
    addAttribute(attribute) {
      const attributes = this.attributes.concat(expandAttribute(attribute));
      return this.copyWithAttributes(attributes);
    }
    addHTMLAttribute(attribute, value) {
      const htmlAttributes = Object.assign({}, this.htmlAttributes, {
        [attribute]: value
      });
      return new Block(this.text, this.attributes, htmlAttributes);
    }
    removeAttribute(attribute) {
      const {
        listAttribute
      } = getBlockConfig(attribute);
      const attributes = removeLastValue(removeLastValue(this.attributes, attribute), listAttribute);
      return this.copyWithAttributes(attributes);
    }
    removeLastAttribute() {
      return this.removeAttribute(this.getLastAttribute());
    }
    getLastAttribute() {
      return getLastElement(this.attributes);
    }
    getAttributes() {
      return this.attributes.slice(0);
    }
    getAttributeLevel() {
      return this.attributes.length;
    }
    getAttributeAtLevel(level) {
      return this.attributes[level - 1];
    }
    hasAttribute(attributeName) {
      return this.attributes.includes(attributeName);
    }
    hasAttributes() {
      return this.getAttributeLevel() > 0;
    }
    getLastNestableAttribute() {
      return getLastElement(this.getNestableAttributes());
    }
    getNestableAttributes() {
      return this.attributes.filter(attribute => getBlockConfig(attribute).nestable);
    }
    getNestingLevel() {
      return this.getNestableAttributes().length;
    }
    decreaseNestingLevel() {
      const attribute = this.getLastNestableAttribute();
      if (attribute) {
        return this.removeAttribute(attribute);
      } else {
        return this;
      }
    }
    increaseNestingLevel() {
      const attribute = this.getLastNestableAttribute();
      if (attribute) {
        const index = this.attributes.lastIndexOf(attribute);
        const attributes = spliceArray(this.attributes, index + 1, 0, ...expandAttribute(attribute));
        return this.copyWithAttributes(attributes);
      } else {
        return this;
      }
    }
    getListItemAttributes() {
      return this.attributes.filter(attribute => getBlockConfig(attribute).listAttribute);
    }
    isListItem() {
      var _getBlockConfig;
      return (_getBlockConfig = getBlockConfig(this.getLastAttribute())) === null || _getBlockConfig === void 0 ? void 0 : _getBlockConfig.listAttribute;
    }
    isTerminalBlock() {
      var _getBlockConfig2;
      return (_getBlockConfig2 = getBlockConfig(this.getLastAttribute())) === null || _getBlockConfig2 === void 0 ? void 0 : _getBlockConfig2.terminal;
    }
    breaksOnReturn() {
      var _getBlockConfig3;
      return (_getBlockConfig3 = getBlockConfig(this.getLastAttribute())) === null || _getBlockConfig3 === void 0 ? void 0 : _getBlockConfig3.breakOnReturn;
    }
    findLineBreakInDirectionFromPosition(direction, position) {
      const string = this.toString();
      let result;
      switch (direction) {
        case "forward":
          result = string.indexOf("\n", position);
          break;
        case "backward":
          result = string.slice(0, position).lastIndexOf("\n");
      }
      if (result !== -1) {
        return result;
      }
    }
    contentsForInspection() {
      return {
        text: this.text.inspect(),
        attributes: this.attributes
      };
    }
    toString() {
      return this.text.toString();
    }
    toJSON() {
      return {
        text: this.text,
        attributes: this.attributes,
        htmlAttributes: this.htmlAttributes
      };
    }

    // BIDI

    getDirection() {
      return this.text.getDirection();
    }
    isRTL() {
      return this.text.isRTL();
    }

    // Splittable

    getLength() {
      return this.text.getLength();
    }
    canBeConsolidatedWith(block) {
      return !this.hasAttributes() && !block.hasAttributes() && this.getDirection() === block.getDirection();
    }
    consolidateWith(block) {
      const newlineText = Text.textForStringWithAttributes("\n");
      const text = this.getTextWithoutBlockBreak().appendText(newlineText);
      return this.copyWithText(text.appendText(block.text));
    }
    splitAtOffset(offset) {
      let left, right;
      if (offset === 0) {
        left = null;
        right = this;
      } else if (offset === this.getLength()) {
        left = this;
        right = null;
      } else {
        left = this.copyWithText(this.text.getTextAtRange([0, offset]));
        right = this.copyWithText(this.text.getTextAtRange([offset, this.getLength()]));
      }
      return [left, right];
    }
    getBlockBreakPosition() {
      return this.text.getLength() - 1;
    }
    getTextWithoutBlockBreak() {
      if (textEndsInBlockBreak(this.text)) {
        return this.text.getTextAtRange([0, this.getBlockBreakPosition()]);
      } else {
        return this.text.copy();
      }
    }

    // Grouping

    canBeGrouped(depth) {
      return this.attributes[depth];
    }
    canBeGroupedWith(otherBlock, depth) {
      const otherAttributes = otherBlock.getAttributes();
      const otherAttribute = otherAttributes[depth];
      const attribute = this.attributes[depth];
      return attribute === otherAttribute && !(getBlockConfig(attribute).group === false && !getListAttributeNames().includes(otherAttributes[depth + 1])) && (this.getDirection() === otherBlock.getDirection() || otherBlock.isEmpty());
    }
  }

  // Block breaks

  const applyBlockBreakToText = function (text) {
    text = unmarkExistingInnerBlockBreaksInText(text);
    text = addBlockBreakToText(text);
    return text;
  };
  const unmarkExistingInnerBlockBreaksInText = function (text) {
    let modified = false;
    const pieces = text.getPieces();
    let innerPieces = pieces.slice(0, pieces.length - 1);
    const lastPiece = pieces[pieces.length - 1];
    if (!lastPiece) return text;
    innerPieces = innerPieces.map(piece => {
      if (piece.isBlockBreak()) {
        modified = true;
        return unmarkBlockBreakPiece(piece);
      } else {
        return piece;
      }
    });
    if (modified) {
      return new Text([...innerPieces, lastPiece]);
    } else {
      return text;
    }
  };
  const blockBreakText = Text.textForStringWithAttributes("\n", {
    blockBreak: true
  });
  const addBlockBreakToText = function (text) {
    if (textEndsInBlockBreak(text)) {
      return text;
    } else {
      return text.appendText(blockBreakText);
    }
  };
  const textEndsInBlockBreak = function (text) {
    const length = text.getLength();
    if (length === 0) {
      return false;
    }
    const endText = text.getTextAtRange([length - 1, length]);
    return endText.isBlockBreak();
  };
  const unmarkBlockBreakPiece = piece => piece.copyWithoutAttribute("blockBreak");

  // Attributes

  const expandAttribute = function (attribute) {
    const {
      listAttribute
    } = getBlockConfig(attribute);
    if (listAttribute) {
      return [listAttribute, attribute];
    } else {
      return [attribute];
    }
  };

  // Array helpers

  const getLastElement = array => array.slice(-1)[0];
  const removeLastValue = function (array, value) {
    const index = array.lastIndexOf(value);
    if (index === -1) {
      return array;
    } else {
      return spliceArray(array, index, 1);
    }
  };

  class Document extends TrixObject {
    static fromJSON(documentJSON) {
      const blocks = Array.from(documentJSON).map(blockJSON => Block.fromJSON(blockJSON));
      return new this(blocks);
    }
    static fromString(string, textAttributes) {
      const text = Text.textForStringWithAttributes(string, textAttributes);
      return new this([new Block(text)]);
    }
    constructor() {
      let blocks = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      super(...arguments);
      if (blocks.length === 0) {
        blocks = [new Block()];
      }
      this.blockList = SplittableList.box(blocks);
    }
    isEmpty() {
      const block = this.getBlockAtIndex(0);
      return this.blockList.length === 1 && block.isEmpty() && !block.hasAttributes();
    }
    copy() {
      let options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      const blocks = options.consolidateBlocks ? this.blockList.consolidate().toArray() : this.blockList.toArray();
      return new this.constructor(blocks);
    }
    copyUsingObjectsFromDocument(sourceDocument) {
      const objectMap = new ObjectMap(sourceDocument.getObjects());
      return this.copyUsingObjectMap(objectMap);
    }
    copyUsingObjectMap(objectMap) {
      const blocks = this.getBlocks().map(block => {
        const mappedBlock = objectMap.find(block);
        return mappedBlock || block.copyUsingObjectMap(objectMap);
      });
      return new this.constructor(blocks);
    }
    copyWithBaseBlockAttributes() {
      let blockAttributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      const blocks = this.getBlocks().map(block => {
        const attributes = blockAttributes.concat(block.getAttributes());
        return block.copyWithAttributes(attributes);
      });
      return new this.constructor(blocks);
    }
    replaceBlock(oldBlock, newBlock) {
      const index = this.blockList.indexOf(oldBlock);
      if (index === -1) {
        return this;
      }
      return new this.constructor(this.blockList.replaceObjectAtIndex(newBlock, index));
    }
    insertDocumentAtRange(document, range) {
      const {
        blockList
      } = document;
      range = normalizeRange(range);
      let [position] = range;
      const {
        index,
        offset
      } = this.locationFromPosition(position);
      let result = this;
      const block = this.getBlockAtPosition(position);
      if (rangeIsCollapsed(range) && block.isEmpty() && !block.hasAttributes()) {
        result = new this.constructor(result.blockList.removeObjectAtIndex(index));
      } else if (block.getBlockBreakPosition() === offset) {
        position++;
      }
      result = result.removeTextAtRange(range);
      return new this.constructor(result.blockList.insertSplittableListAtPosition(blockList, position));
    }
    mergeDocumentAtRange(document, range) {
      let formattedDocument, result;
      range = normalizeRange(range);
      const [startPosition] = range;
      const startLocation = this.locationFromPosition(startPosition);
      const blockAttributes = this.getBlockAtIndex(startLocation.index).getAttributes();
      const baseBlockAttributes = document.getBaseBlockAttributes();
      const trailingBlockAttributes = blockAttributes.slice(-baseBlockAttributes.length);
      if (arraysAreEqual(baseBlockAttributes, trailingBlockAttributes)) {
        const leadingBlockAttributes = blockAttributes.slice(0, -baseBlockAttributes.length);
        formattedDocument = document.copyWithBaseBlockAttributes(leadingBlockAttributes);
      } else {
        formattedDocument = document.copy({
          consolidateBlocks: true
        }).copyWithBaseBlockAttributes(blockAttributes);
      }
      const blockCount = formattedDocument.getBlockCount();
      const firstBlock = formattedDocument.getBlockAtIndex(0);
      if (arraysAreEqual(blockAttributes, firstBlock.getAttributes())) {
        const firstText = firstBlock.getTextWithoutBlockBreak();
        result = this.insertTextAtRange(firstText, range);
        if (blockCount > 1) {
          formattedDocument = new this.constructor(formattedDocument.getBlocks().slice(1));
          const position = startPosition + firstText.getLength();
          result = result.insertDocumentAtRange(formattedDocument, position);
        }
      } else {
        result = this.insertDocumentAtRange(formattedDocument, range);
      }
      return result;
    }
    insertTextAtRange(text, range) {
      range = normalizeRange(range);
      const [startPosition] = range;
      const {
        index,
        offset
      } = this.locationFromPosition(startPosition);
      const document = this.removeTextAtRange(range);
      return new this.constructor(document.blockList.editObjectAtIndex(index, block => block.copyWithText(block.text.insertTextAtPosition(text, offset))));
    }
    removeTextAtRange(range) {
      let blocks;
      range = normalizeRange(range);
      const [leftPosition, rightPosition] = range;
      if (rangeIsCollapsed(range)) {
        return this;
      }
      const [leftLocation, rightLocation] = Array.from(this.locationRangeFromRange(range));
      const leftIndex = leftLocation.index;
      const leftOffset = leftLocation.offset;
      const leftBlock = this.getBlockAtIndex(leftIndex);
      const rightIndex = rightLocation.index;
      const rightOffset = rightLocation.offset;
      const rightBlock = this.getBlockAtIndex(rightIndex);
      const removeRightNewline = rightPosition - leftPosition === 1 && leftBlock.getBlockBreakPosition() === leftOffset && rightBlock.getBlockBreakPosition() !== rightOffset && rightBlock.text.getStringAtPosition(rightOffset) === "\n";
      if (removeRightNewline) {
        blocks = this.blockList.editObjectAtIndex(rightIndex, block => block.copyWithText(block.text.removeTextAtRange([rightOffset, rightOffset + 1])));
      } else {
        let block;
        const leftText = leftBlock.text.getTextAtRange([0, leftOffset]);
        const rightText = rightBlock.text.getTextAtRange([rightOffset, rightBlock.getLength()]);
        const text = leftText.appendText(rightText);
        const removingLeftBlock = leftIndex !== rightIndex && leftOffset === 0;
        const useRightBlock = removingLeftBlock && leftBlock.getAttributeLevel() >= rightBlock.getAttributeLevel();
        if (useRightBlock) {
          block = rightBlock.copyWithText(text);
        } else {
          block = leftBlock.copyWithText(text);
        }
        const affectedBlockCount = rightIndex + 1 - leftIndex;
        blocks = this.blockList.splice(leftIndex, affectedBlockCount, block);
      }
      return new this.constructor(blocks);
    }
    moveTextFromRangeToPosition(range, position) {
      let text;
      range = normalizeRange(range);
      const [startPosition, endPosition] = range;
      if (startPosition <= position && position <= endPosition) {
        return this;
      }
      let document = this.getDocumentAtRange(range);
      let result = this.removeTextAtRange(range);
      const movingRightward = startPosition < position;
      if (movingRightward) {
        position -= document.getLength();
      }
      const [firstBlock, ...blocks] = document.getBlocks();
      if (blocks.length === 0) {
        text = firstBlock.getTextWithoutBlockBreak();
        if (movingRightward) {
          position += 1;
        }
      } else {
        text = firstBlock.text;
      }
      result = result.insertTextAtRange(text, position);
      if (blocks.length === 0) {
        return result;
      }
      document = new this.constructor(blocks);
      position += text.getLength();
      return result.insertDocumentAtRange(document, position);
    }
    addAttributeAtRange(attribute, value, range) {
      let {
        blockList
      } = this;
      this.eachBlockAtRange(range, (block, textRange, index) => blockList = blockList.editObjectAtIndex(index, function () {
        if (getBlockConfig(attribute)) {
          return block.addAttribute(attribute, value);
        } else {
          if (textRange[0] === textRange[1]) {
            return block;
          } else {
            return block.copyWithText(block.text.addAttributeAtRange(attribute, value, textRange));
          }
        }
      }));
      return new this.constructor(blockList);
    }
    addAttribute(attribute, value) {
      let {
        blockList
      } = this;
      this.eachBlock((block, index) => blockList = blockList.editObjectAtIndex(index, () => block.addAttribute(attribute, value)));
      return new this.constructor(blockList);
    }
    removeAttributeAtRange(attribute, range) {
      let {
        blockList
      } = this;
      this.eachBlockAtRange(range, function (block, textRange, index) {
        if (getBlockConfig(attribute)) {
          blockList = blockList.editObjectAtIndex(index, () => block.removeAttribute(attribute));
        } else if (textRange[0] !== textRange[1]) {
          blockList = blockList.editObjectAtIndex(index, () => block.copyWithText(block.text.removeAttributeAtRange(attribute, textRange)));
        }
      });
      return new this.constructor(blockList);
    }
    updateAttributesForAttachment(attributes, attachment) {
      const range = this.getRangeOfAttachment(attachment);
      const [startPosition] = Array.from(range);
      const {
        index
      } = this.locationFromPosition(startPosition);
      const text = this.getTextAtIndex(index);
      return new this.constructor(this.blockList.editObjectAtIndex(index, block => block.copyWithText(text.updateAttributesForAttachment(attributes, attachment))));
    }
    removeAttributeForAttachment(attribute, attachment) {
      const range = this.getRangeOfAttachment(attachment);
      return this.removeAttributeAtRange(attribute, range);
    }
    setHTMLAttributeAtPosition(position, name, value) {
      const block = this.getBlockAtPosition(position);
      const updatedBlock = block.addHTMLAttribute(name, value);
      return this.replaceBlock(block, updatedBlock);
    }
    insertBlockBreakAtRange(range) {
      let blocks;
      range = normalizeRange(range);
      const [startPosition] = range;
      const {
        offset
      } = this.locationFromPosition(startPosition);
      const document = this.removeTextAtRange(range);
      if (offset === 0) {
        blocks = [new Block()];
      }
      return new this.constructor(document.blockList.insertSplittableListAtPosition(new SplittableList(blocks), startPosition));
    }
    applyBlockAttributeAtRange(attributeName, value, range) {
      const expanded = this.expandRangeToLineBreaksAndSplitBlocks(range);
      let document = expanded.document;
      range = expanded.range;
      const blockConfig = getBlockConfig(attributeName);
      if (blockConfig.listAttribute) {
        document = document.removeLastListAttributeAtRange(range, {
          exceptAttributeName: attributeName
        });
        const converted = document.convertLineBreaksToBlockBreaksInRange(range);
        document = converted.document;
        range = converted.range;
      } else if (blockConfig.exclusive) {
        document = document.removeBlockAttributesAtRange(range);
      } else if (blockConfig.terminal) {
        document = document.removeLastTerminalAttributeAtRange(range);
      } else {
        document = document.consolidateBlocksAtRange(range);
      }
      return document.addAttributeAtRange(attributeName, value, range);
    }
    removeLastListAttributeAtRange(range) {
      let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let {
        blockList
      } = this;
      this.eachBlockAtRange(range, function (block, textRange, index) {
        const lastAttributeName = block.getLastAttribute();
        if (!lastAttributeName) {
          return;
        }
        if (!getBlockConfig(lastAttributeName).listAttribute) {
          return;
        }
        if (lastAttributeName === options.exceptAttributeName) {
          return;
        }
        blockList = blockList.editObjectAtIndex(index, () => block.removeAttribute(lastAttributeName));
      });
      return new this.constructor(blockList);
    }
    removeLastTerminalAttributeAtRange(range) {
      let {
        blockList
      } = this;
      this.eachBlockAtRange(range, function (block, textRange, index) {
        const lastAttributeName = block.getLastAttribute();
        if (!lastAttributeName) {
          return;
        }
        if (!getBlockConfig(lastAttributeName).terminal) {
          return;
        }
        blockList = blockList.editObjectAtIndex(index, () => block.removeAttribute(lastAttributeName));
      });
      return new this.constructor(blockList);
    }
    removeBlockAttributesAtRange(range) {
      let {
        blockList
      } = this;
      this.eachBlockAtRange(range, function (block, textRange, index) {
        if (block.hasAttributes()) {
          blockList = blockList.editObjectAtIndex(index, () => block.copyWithoutAttributes());
        }
      });
      return new this.constructor(blockList);
    }
    expandRangeToLineBreaksAndSplitBlocks(range) {
      let position;
      range = normalizeRange(range);
      let [startPosition, endPosition] = range;
      const startLocation = this.locationFromPosition(startPosition);
      const endLocation = this.locationFromPosition(endPosition);
      let document = this;
      const startBlock = document.getBlockAtIndex(startLocation.index);
      startLocation.offset = startBlock.findLineBreakInDirectionFromPosition("backward", startLocation.offset);
      if (startLocation.offset != null) {
        position = document.positionFromLocation(startLocation);
        document = document.insertBlockBreakAtRange([position, position + 1]);
        endLocation.index += 1;
        endLocation.offset -= document.getBlockAtIndex(startLocation.index).getLength();
        startLocation.index += 1;
      }
      startLocation.offset = 0;
      if (endLocation.offset === 0 && endLocation.index > startLocation.index) {
        endLocation.index -= 1;
        endLocation.offset = document.getBlockAtIndex(endLocation.index).getBlockBreakPosition();
      } else {
        const endBlock = document.getBlockAtIndex(endLocation.index);
        if (endBlock.text.getStringAtRange([endLocation.offset - 1, endLocation.offset]) === "\n") {
          endLocation.offset -= 1;
        } else {
          endLocation.offset = endBlock.findLineBreakInDirectionFromPosition("forward", endLocation.offset);
        }
        if (endLocation.offset !== endBlock.getBlockBreakPosition()) {
          position = document.positionFromLocation(endLocation);
          document = document.insertBlockBreakAtRange([position, position + 1]);
        }
      }
      startPosition = document.positionFromLocation(startLocation);
      endPosition = document.positionFromLocation(endLocation);
      range = normalizeRange([startPosition, endPosition]);
      return {
        document,
        range
      };
    }
    convertLineBreaksToBlockBreaksInRange(range) {
      range = normalizeRange(range);
      let [position] = range;
      const string = this.getStringAtRange(range).slice(0, -1);
      let document = this;
      string.replace(/.*?\n/g, function (match) {
        position += match.length;
        document = document.insertBlockBreakAtRange([position - 1, position]);
      });
      return {
        document,
        range
      };
    }
    consolidateBlocksAtRange(range) {
      range = normalizeRange(range);
      const [startPosition, endPosition] = range;
      const startIndex = this.locationFromPosition(startPosition).index;
      const endIndex = this.locationFromPosition(endPosition).index;
      return new this.constructor(this.blockList.consolidateFromIndexToIndex(startIndex, endIndex));
    }
    getDocumentAtRange(range) {
      range = normalizeRange(range);
      const blocks = this.blockList.getSplittableListInRange(range).toArray();
      return new this.constructor(blocks);
    }
    getStringAtRange(range) {
      let endIndex;
      const array = range = normalizeRange(range),
        endPosition = array[array.length - 1];
      if (endPosition !== this.getLength()) {
        endIndex = -1;
      }
      return this.getDocumentAtRange(range).toString().slice(0, endIndex);
    }
    getBlockAtIndex(index) {
      return this.blockList.getObjectAtIndex(index);
    }
    getBlockAtPosition(position) {
      const {
        index
      } = this.locationFromPosition(position);
      return this.getBlockAtIndex(index);
    }
    getTextAtIndex(index) {
      var _this$getBlockAtIndex;
      return (_this$getBlockAtIndex = this.getBlockAtIndex(index)) === null || _this$getBlockAtIndex === void 0 ? void 0 : _this$getBlockAtIndex.text;
    }
    getTextAtPosition(position) {
      const {
        index
      } = this.locationFromPosition(position);
      return this.getTextAtIndex(index);
    }
    getPieceAtPosition(position) {
      const {
        index,
        offset
      } = this.locationFromPosition(position);
      return this.getTextAtIndex(index).getPieceAtPosition(offset);
    }
    getCharacterAtPosition(position) {
      const {
        index,
        offset
      } = this.locationFromPosition(position);
      return this.getTextAtIndex(index).getStringAtRange([offset, offset + 1]);
    }
    getLength() {
      return this.blockList.getEndPosition();
    }
    getBlocks() {
      return this.blockList.toArray();
    }
    getBlockCount() {
      return this.blockList.length;
    }
    getEditCount() {
      return this.editCount;
    }
    eachBlock(callback) {
      return this.blockList.eachObject(callback);
    }
    eachBlockAtRange(range, callback) {
      let block, textRange;
      range = normalizeRange(range);
      const [startPosition, endPosition] = range;
      const startLocation = this.locationFromPosition(startPosition);
      const endLocation = this.locationFromPosition(endPosition);
      if (startLocation.index === endLocation.index) {
        block = this.getBlockAtIndex(startLocation.index);
        textRange = [startLocation.offset, endLocation.offset];
        return callback(block, textRange, startLocation.index);
      } else {
        for (let index = startLocation.index; index <= endLocation.index; index++) {
          block = this.getBlockAtIndex(index);
          if (block) {
            switch (index) {
              case startLocation.index:
                textRange = [startLocation.offset, block.text.getLength()];
                break;
              case endLocation.index:
                textRange = [0, endLocation.offset];
                break;
              default:
                textRange = [0, block.text.getLength()];
            }
            callback(block, textRange, index);
          }
        }
      }
    }
    getCommonAttributesAtRange(range) {
      range = normalizeRange(range);
      const [startPosition] = range;
      if (rangeIsCollapsed(range)) {
        return this.getCommonAttributesAtPosition(startPosition);
      } else {
        const textAttributes = [];
        const blockAttributes = [];
        this.eachBlockAtRange(range, function (block, textRange) {
          if (textRange[0] !== textRange[1]) {
            textAttributes.push(block.text.getCommonAttributesAtRange(textRange));
            return blockAttributes.push(attributesForBlock(block));
          }
        });
        return Hash.fromCommonAttributesOfObjects(textAttributes).merge(Hash.fromCommonAttributesOfObjects(blockAttributes)).toObject();
      }
    }
    getCommonAttributesAtPosition(position) {
      let key, value;
      const {
        index,
        offset
      } = this.locationFromPosition(position);
      const block = this.getBlockAtIndex(index);
      if (!block) {
        return {};
      }
      const commonAttributes = attributesForBlock(block);
      const attributes = block.text.getAttributesAtPosition(offset);
      const attributesLeft = block.text.getAttributesAtPosition(offset - 1);
      const inheritableAttributes = Object.keys(text_attributes).filter(key => {
        return text_attributes[key].inheritable;
      });
      for (key in attributesLeft) {
        value = attributesLeft[key];
        if (value === attributes[key] || inheritableAttributes.includes(key)) {
          commonAttributes[key] = value;
        }
      }
      return commonAttributes;
    }
    getRangeOfCommonAttributeAtPosition(attributeName, position) {
      const {
        index,
        offset
      } = this.locationFromPosition(position);
      const text = this.getTextAtIndex(index);
      const [startOffset, endOffset] = Array.from(text.getExpandedRangeForAttributeAtOffset(attributeName, offset));
      const start = this.positionFromLocation({
        index,
        offset: startOffset
      });
      const end = this.positionFromLocation({
        index,
        offset: endOffset
      });
      return normalizeRange([start, end]);
    }
    getBaseBlockAttributes() {
      let baseBlockAttributes = this.getBlockAtIndex(0).getAttributes();
      for (let blockIndex = 1; blockIndex < this.getBlockCount(); blockIndex++) {
        const blockAttributes = this.getBlockAtIndex(blockIndex).getAttributes();
        const lastAttributeIndex = Math.min(baseBlockAttributes.length, blockAttributes.length);
        baseBlockAttributes = (() => {
          const result = [];
          for (let index = 0; index < lastAttributeIndex; index++) {
            if (blockAttributes[index] !== baseBlockAttributes[index]) {
              break;
            }
            result.push(blockAttributes[index]);
          }
          return result;
        })();
      }
      return baseBlockAttributes;
    }
    getAttachmentById(attachmentId) {
      for (const attachment of this.getAttachments()) {
        if (attachment.id === attachmentId) {
          return attachment;
        }
      }
    }
    getAttachmentPieces() {
      let attachmentPieces = [];
      this.blockList.eachObject(_ref => {
        let {
          text
        } = _ref;
        return attachmentPieces = attachmentPieces.concat(text.getAttachmentPieces());
      });
      return attachmentPieces;
    }
    getAttachments() {
      return this.getAttachmentPieces().map(piece => piece.attachment);
    }
    getRangeOfAttachment(attachment) {
      let position = 0;
      const iterable = this.blockList.toArray();
      for (let index = 0; index < iterable.length; index++) {
        const {
          text
        } = iterable[index];
        const textRange = text.getRangeOfAttachment(attachment);
        if (textRange) {
          return normalizeRange([position + textRange[0], position + textRange[1]]);
        }
        position += text.getLength();
      }
    }
    getLocationRangeOfAttachment(attachment) {
      const range = this.getRangeOfAttachment(attachment);
      return this.locationRangeFromRange(range);
    }
    getAttachmentPieceForAttachment(attachment) {
      for (const piece of this.getAttachmentPieces()) {
        if (piece.attachment === attachment) {
          return piece;
        }
      }
    }
    findRangesForBlockAttribute(attributeName) {
      let position = 0;
      const ranges = [];
      this.getBlocks().forEach(block => {
        const length = block.getLength();
        if (block.hasAttribute(attributeName)) {
          ranges.push([position, position + length]);
        }
        position += length;
      });
      return ranges;
    }
    findRangesForTextAttribute(attributeName) {
      let {
        withValue
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let position = 0;
      let range = [];
      const ranges = [];
      const match = function (piece) {
        if (withValue) {
          return piece.getAttribute(attributeName) === withValue;
        } else {
          return piece.hasAttribute(attributeName);
        }
      };
      this.getPieces().forEach(piece => {
        const length = piece.getLength();
        if (match(piece)) {
          if (range[1] === position) {
            range[1] = position + length;
          } else {
            ranges.push(range = [position, position + length]);
          }
        }
        position += length;
      });
      return ranges;
    }
    locationFromPosition(position) {
      const location = this.blockList.findIndexAndOffsetAtPosition(Math.max(0, position));
      if (location.index != null) {
        return location;
      } else {
        const blocks = this.getBlocks();
        return {
          index: blocks.length - 1,
          offset: blocks[blocks.length - 1].getLength()
        };
      }
    }
    positionFromLocation(location) {
      return this.blockList.findPositionAtIndexAndOffset(location.index, location.offset);
    }
    locationRangeFromPosition(position) {
      return normalizeRange(this.locationFromPosition(position));
    }
    locationRangeFromRange(range) {
      range = normalizeRange(range);
      if (!range) return;
      const [startPosition, endPosition] = Array.from(range);
      const startLocation = this.locationFromPosition(startPosition);
      const endLocation = this.locationFromPosition(endPosition);
      return normalizeRange([startLocation, endLocation]);
    }
    rangeFromLocationRange(locationRange) {
      let rightPosition;
      locationRange = normalizeRange(locationRange);
      const leftPosition = this.positionFromLocation(locationRange[0]);
      if (!rangeIsCollapsed(locationRange)) {
        rightPosition = this.positionFromLocation(locationRange[1]);
      }
      return normalizeRange([leftPosition, rightPosition]);
    }
    isEqualTo(document) {
      return this.blockList.isEqualTo(document === null || document === void 0 ? void 0 : document.blockList);
    }
    getTexts() {
      return this.getBlocks().map(block => block.text);
    }
    getPieces() {
      const pieces = [];
      Array.from(this.getTexts()).forEach(text => {
        pieces.push(...Array.from(text.getPieces() || []));
      });
      return pieces;
    }
    getObjects() {
      return this.getBlocks().concat(this.getTexts()).concat(this.getPieces());
    }
    toSerializableDocument() {
      const blocks = [];
      this.blockList.eachObject(block => blocks.push(block.copyWithText(block.text.toSerializableText())));
      return new this.constructor(blocks);
    }
    toString() {
      return this.blockList.toString();
    }
    toJSON() {
      return this.blockList.toJSON();
    }
    toConsole() {
      return JSON.stringify(this.blockList.toArray().map(block => JSON.parse(block.text.toConsole())));
    }
  }
  const attributesForBlock = function (block) {
    const attributes = {};
    const attributeName = block.getLastAttribute();
    if (attributeName) {
      attributes[attributeName] = true;
    }
    return attributes;
  };

  /* eslint-disable
      no-case-declarations,
      no-irregular-whitespace,
  */
  const pieceForString = function (string) {
    let attributes = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const type = "string";
    string = normalizeSpaces(string);
    return {
      string,
      attributes,
      type
    };
  };
  const pieceForAttachment = function (attachment) {
    let attributes = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const type = "attachment";
    return {
      attachment,
      attributes,
      type
    };
  };
  const blockForAttributes = function () {
    let attributes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
    let htmlAttributes = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    const text = [];
    return {
      text,
      attributes,
      htmlAttributes
    };
  };
  const parseTrixDataAttribute = (element, name) => {
    try {
      return JSON.parse(element.getAttribute("data-trix-".concat(name)));
    } catch (error) {
      return {};
    }
  };
  const getImageDimensions = element => {
    const width = element.getAttribute("width");
    const height = element.getAttribute("height");
    const dimensions = {};
    if (width) {
      dimensions.width = parseInt(width, 10);
    }
    if (height) {
      dimensions.height = parseInt(height, 10);
    }
    return dimensions;
  };
  class HTMLParser extends BasicObject {
    static parse(html, options) {
      const parser = new this(html, options);
      parser.parse();
      return parser;
    }
    constructor(html) {
      let {
        referenceElement
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      super(...arguments);
      this.html = html;
      this.referenceElement = referenceElement;
      this.blocks = [];
      this.blockElements = [];
      this.processedElements = [];
    }
    getDocument() {
      return Document.fromJSON(this.blocks);
    }

    // HTML parsing

    parse() {
      try {
        this.createHiddenContainer();
        HTMLSanitizer.setHTML(this.containerElement, this.html);
        const walker = walkTree(this.containerElement, {
          usingFilter: nodeFilter
        });
        while (walker.nextNode()) {
          this.processNode(walker.currentNode);
        }
        return this.translateBlockElementMarginsToNewlines();
      } finally {
        this.removeHiddenContainer();
      }
    }
    createHiddenContainer() {
      if (this.referenceElement) {
        this.containerElement = this.referenceElement.cloneNode(false);
        this.containerElement.removeAttribute("id");
        this.containerElement.setAttribute("data-trix-internal", "");
        this.containerElement.style.display = "none";
        return this.referenceElement.parentNode.insertBefore(this.containerElement, this.referenceElement.nextSibling);
      } else {
        this.containerElement = makeElement({
          tagName: "div",
          style: {
            display: "none"
          }
        });
        return document.body.appendChild(this.containerElement);
      }
    }
    removeHiddenContainer() {
      return removeNode(this.containerElement);
    }
    processNode(node) {
      switch (node.nodeType) {
        case Node.TEXT_NODE:
          if (!this.isInsignificantTextNode(node)) {
            this.appendBlockForTextNode(node);
            return this.processTextNode(node);
          }
          break;
        case Node.ELEMENT_NODE:
          this.appendBlockForElement(node);
          return this.processElement(node);
      }
    }
    appendBlockForTextNode(node) {
      const element = node.parentNode;
      if (element === this.currentBlockElement && this.isBlockElement(node.previousSibling)) {
        return this.appendStringWithAttributes("\n");
      } else if (element === this.containerElement || this.isBlockElement(element)) {
        var _this$currentBlock;
        const attributes = this.getBlockAttributes(element);
        const htmlAttributes = this.getBlockHTMLAttributes(element);
        if (!arraysAreEqual(attributes, (_this$currentBlock = this.currentBlock) === null || _this$currentBlock === void 0 ? void 0 : _this$currentBlock.attributes)) {
          this.currentBlock = this.appendBlockForAttributesWithElement(attributes, element, htmlAttributes);
          this.currentBlockElement = element;
        }
      }
    }
    appendBlockForElement(element) {
      const elementIsBlockElement = this.isBlockElement(element);
      const currentBlockContainsElement = elementContainsNode(this.currentBlockElement, element);
      if (elementIsBlockElement && !this.isBlockElement(element.firstChild)) {
        if (!this.isInsignificantTextNode(element.firstChild) || !this.isBlockElement(element.firstElementChild)) {
          const attributes = this.getBlockAttributes(element);
          const htmlAttributes = this.getBlockHTMLAttributes(element);
          if (element.firstChild) {
            if (!(currentBlockContainsElement && arraysAreEqual(attributes, this.currentBlock.attributes))) {
              this.currentBlock = this.appendBlockForAttributesWithElement(attributes, element, htmlAttributes);
              this.currentBlockElement = element;
            } else {
              return this.appendStringWithAttributes("\n");
            }
          }
        }
      } else if (this.currentBlockElement && !currentBlockContainsElement && !elementIsBlockElement) {
        const parentBlockElement = this.findParentBlockElement(element);
        if (parentBlockElement) {
          return this.appendBlockForElement(parentBlockElement);
        } else {
          this.currentBlock = this.appendEmptyBlock();
          this.currentBlockElement = null;
        }
      }
    }
    findParentBlockElement(element) {
      let {
        parentElement
      } = element;
      while (parentElement && parentElement !== this.containerElement) {
        if (this.isBlockElement(parentElement) && this.blockElements.includes(parentElement)) {
          return parentElement;
        } else {
          parentElement = parentElement.parentElement;
        }
      }
      return null;
    }
    processTextNode(node) {
      let string = node.data;
      if (!elementCanDisplayPreformattedText(node.parentNode)) {
        var _node$previousSibling;
        string = squishBreakableWhitespace(string);
        if (stringEndsWithWhitespace((_node$previousSibling = node.previousSibling) === null || _node$previousSibling === void 0 ? void 0 : _node$previousSibling.textContent)) {
          string = leftTrimBreakableWhitespace(string);
        }
      }
      return this.appendStringWithAttributes(string, this.getTextAttributes(node.parentNode));
    }
    processElement(element) {
      let attributes;
      if (nodeIsAttachmentElement(element)) {
        attributes = parseTrixDataAttribute(element, "attachment");
        if (Object.keys(attributes).length) {
          const textAttributes = this.getTextAttributes(element);
          this.appendAttachmentWithAttributes(attributes, textAttributes);
          // We have everything we need so avoid processing inner nodes
          element.innerHTML = "";
        }
        return this.processedElements.push(element);
      } else {
        switch (tagName(element)) {
          case "br":
            if (!this.isExtraBR(element) && !this.isBlockElement(element.nextSibling)) {
              this.appendStringWithAttributes("\n", this.getTextAttributes(element));
            }
            return this.processedElements.push(element);
          case "img":
            attributes = {
              url: element.getAttribute("src"),
              contentType: "image"
            };
            const object = getImageDimensions(element);
            for (const key in object) {
              const value = object[key];
              attributes[key] = value;
            }
            this.appendAttachmentWithAttributes(attributes, this.getTextAttributes(element));
            return this.processedElements.push(element);
          case "tr":
            if (this.needsTableSeparator(element)) {
              return this.appendStringWithAttributes(parser.tableRowSeparator);
            }
            break;
          case "td":
            if (this.needsTableSeparator(element)) {
              return this.appendStringWithAttributes(parser.tableCellSeparator);
            }
            break;
        }
      }
    }

    // Document construction

    appendBlockForAttributesWithElement(attributes, element) {
      let htmlAttributes = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
      this.blockElements.push(element);
      const block = blockForAttributes(attributes, htmlAttributes);
      this.blocks.push(block);
      return block;
    }
    appendEmptyBlock() {
      return this.appendBlockForAttributesWithElement([], null);
    }
    appendStringWithAttributes(string, attributes) {
      return this.appendPiece(pieceForString(string, attributes));
    }
    appendAttachmentWithAttributes(attachment, attributes) {
      return this.appendPiece(pieceForAttachment(attachment, attributes));
    }
    appendPiece(piece) {
      if (this.blocks.length === 0) {
        this.appendEmptyBlock();
      }
      return this.blocks[this.blocks.length - 1].text.push(piece);
    }
    appendStringToTextAtIndex(string, index) {
      const {
        text
      } = this.blocks[index];
      const piece = text[text.length - 1];
      if ((piece === null || piece === void 0 ? void 0 : piece.type) === "string") {
        piece.string += string;
      } else {
        return text.push(pieceForString(string));
      }
    }
    prependStringToTextAtIndex(string, index) {
      const {
        text
      } = this.blocks[index];
      const piece = text[0];
      if ((piece === null || piece === void 0 ? void 0 : piece.type) === "string") {
        piece.string = string + piece.string;
      } else {
        return text.unshift(pieceForString(string));
      }
    }

    // Attribute parsing

    getTextAttributes(element) {
      let value;
      const attributes = {};
      for (const attribute in text_attributes) {
        const configAttr = text_attributes[attribute];
        if (configAttr.tagName && findClosestElementFromNode(element, {
          matchingSelector: configAttr.tagName,
          untilNode: this.containerElement
        })) {
          attributes[attribute] = true;
        } else if (configAttr.parser) {
          value = configAttr.parser(element);
          if (value) {
            let attributeInheritedFromBlock = false;
            for (const blockElement of this.findBlockElementAncestors(element)) {
              if (configAttr.parser(blockElement) === value) {
                attributeInheritedFromBlock = true;
                break;
              }
            }
            if (!attributeInheritedFromBlock) {
              attributes[attribute] = value;
            }
          }
        } else if (configAttr.styleProperty) {
          value = element.style[configAttr.styleProperty];
          if (value) {
            attributes[attribute] = value;
          }
        }
      }
      if (nodeIsAttachmentElement(element)) {
        const object = parseTrixDataAttribute(element, "attributes");
        for (const key in object) {
          value = object[key];
          attributes[key] = value;
        }
      }
      return attributes;
    }
    getBlockAttributes(element) {
      const attributes$1 = [];
      while (element && element !== this.containerElement) {
        for (const attribute in attributes) {
          const attrConfig = attributes[attribute];
          if (attrConfig.parse !== false) {
            if (tagName(element) === attrConfig.tagName) {
              var _attrConfig$test;
              if ((_attrConfig$test = attrConfig.test) !== null && _attrConfig$test !== void 0 && _attrConfig$test.call(attrConfig, element) || !attrConfig.test) {
                attributes$1.push(attribute);
                if (attrConfig.listAttribute) {
                  attributes$1.push(attrConfig.listAttribute);
                }
              }
            }
          }
        }
        element = element.parentNode;
      }
      return attributes$1.reverse();
    }
    getBlockHTMLAttributes(element) {
      const attributes$1 = {};
      const blockConfig = Object.values(attributes).find(settings => settings.tagName === tagName(element));
      const allowedAttributes = (blockConfig === null || blockConfig === void 0 ? void 0 : blockConfig.htmlAttributes) || [];
      allowedAttributes.forEach(attribute => {
        if (element.hasAttribute(attribute)) {
          attributes$1[attribute] = element.getAttribute(attribute);
        }
      });
      return attributes$1;
    }
    findBlockElementAncestors(element) {
      const ancestors = [];
      while (element && element !== this.containerElement) {
        const tag = tagName(element);
        if (getBlockTagNames().includes(tag)) {
          ancestors.push(element);
        }
        element = element.parentNode;
      }
      return ancestors;
    }

    // Element inspection

    isBlockElement(element) {
      if ((element === null || element === void 0 ? void 0 : element.nodeType) !== Node.ELEMENT_NODE) return;
      if (nodeIsAttachmentElement(element)) return;
      if (findClosestElementFromNode(element, {
        matchingSelector: "td",
        untilNode: this.containerElement
      })) return;
      return getBlockTagNames().includes(tagName(element)) || window.getComputedStyle(element).display === "block";
    }
    isInsignificantTextNode(node) {
      if ((node === null || node === void 0 ? void 0 : node.nodeType) !== Node.TEXT_NODE) return;
      if (!stringIsAllBreakableWhitespace(node.data)) return;
      const {
        parentNode,
        previousSibling,
        nextSibling
      } = node;
      if (nodeEndsWithNonWhitespace(parentNode.previousSibling) && !this.isBlockElement(parentNode.previousSibling)) return;
      if (elementCanDisplayPreformattedText(parentNode)) return;
      return !previousSibling || this.isBlockElement(previousSibling) || !nextSibling || this.isBlockElement(nextSibling);
    }
    isExtraBR(element) {
      return tagName(element) === "br" && this.isBlockElement(element.parentNode) && element.parentNode.lastChild === element;
    }
    needsTableSeparator(element) {
      if (parser.removeBlankTableCells) {
        var _element$previousSibl;
        const content = (_element$previousSibl = element.previousSibling) === null || _element$previousSibl === void 0 ? void 0 : _element$previousSibl.textContent;
        return content && /\S/.test(content);
      } else {
        return element.previousSibling;
      }
    }

    // Margin translation

    translateBlockElementMarginsToNewlines() {
      const defaultMargin = this.getMarginOfDefaultBlockElement();
      for (let index = 0; index < this.blocks.length; index++) {
        const margin = this.getMarginOfBlockElementAtIndex(index);
        if (margin) {
          if (margin.top > defaultMargin.top * 2) {
            this.prependStringToTextAtIndex("\n", index);
          }
          if (margin.bottom > defaultMargin.bottom * 2) {
            this.appendStringToTextAtIndex("\n", index);
          }
        }
      }
    }
    getMarginOfBlockElementAtIndex(index) {
      const element = this.blockElements[index];
      if (element) {
        if (element.textContent) {
          if (!getBlockTagNames().includes(tagName(element)) && !this.processedElements.includes(element)) {
            return getBlockElementMargin(element);
          }
        }
      }
    }
    getMarginOfDefaultBlockElement() {
      const element = makeElement(attributes.default.tagName);
      this.containerElement.appendChild(element);
      return getBlockElementMargin(element);
    }
  }

  // Helpers

  const elementCanDisplayPreformattedText = function (element) {
    const {
      whiteSpace
    } = window.getComputedStyle(element);
    return ["pre", "pre-wrap", "pre-line"].includes(whiteSpace);
  };
  const nodeEndsWithNonWhitespace = node => node && !stringEndsWithWhitespace(node.textContent);
  const getBlockElementMargin = function (element) {
    const style = window.getComputedStyle(element);
    if (style.display === "block") {
      return {
        top: parseInt(style.marginTop),
        bottom: parseInt(style.marginBottom)
      };
    }
  };
  const nodeFilter = function (node) {
    if (tagName(node) === "style") {
      return NodeFilter.FILTER_REJECT;
    } else {
      return NodeFilter.FILTER_ACCEPT;
    }
  };

  // Whitespace

  const leftTrimBreakableWhitespace = string => string.replace(new RegExp("^".concat(breakableWhitespacePattern.source, "+")), "");
  const stringIsAllBreakableWhitespace = string => new RegExp("^".concat(breakableWhitespacePattern.source, "*$")).test(string);
  const stringEndsWithWhitespace = string => /\s$/.test(string);

  /* eslint-disable
      no-empty,
  */
  const unserializableElementSelector = "[data-trix-serialize=false]";
  const unserializableAttributeNames = ["contenteditable", "data-trix-id", "data-trix-store-key", "data-trix-mutable", "data-trix-placeholder", "tabindex"];
  const serializedAttributesAttribute = "data-trix-serialized-attributes";
  const serializedAttributesSelector = "[".concat(serializedAttributesAttribute, "]");
  const blockCommentPattern = new RegExp("<!--block-->", "g");
  const serializers = {
    "application/json": function (serializable) {
      let document;
      if (serializable instanceof Document) {
        document = serializable;
      } else if (serializable instanceof HTMLElement) {
        document = HTMLParser.parse(serializable.innerHTML).getDocument();
      } else {
        throw new Error("unserializable object");
      }
      return document.toSerializableDocument().toJSONString();
    },
    "text/html": function (serializable) {
      let element;
      if (serializable instanceof Document) {
        element = DocumentView.render(serializable);
      } else if (serializable instanceof HTMLElement) {
        element = serializable.cloneNode(true);
      } else {
        throw new Error("unserializable object");
      }

      // Remove unserializable elements
      Array.from(element.querySelectorAll(unserializableElementSelector)).forEach(el => {
        removeNode(el);
      });

      // Remove unserializable attributes
      unserializableAttributeNames.forEach(attribute => {
        Array.from(element.querySelectorAll("[".concat(attribute, "]"))).forEach(el => {
          el.removeAttribute(attribute);
        });
      });

      // Rewrite elements with serialized attribute overrides
      Array.from(element.querySelectorAll(serializedAttributesSelector)).forEach(el => {
        try {
          const attributes = JSON.parse(el.getAttribute(serializedAttributesAttribute));
          el.removeAttribute(serializedAttributesAttribute);
          for (const name in attributes) {
            const value = attributes[name];
            el.setAttribute(name, value);
          }
        } catch (error) {}
      });
      return element.innerHTML.replace(blockCommentPattern, "");
    }
  };
  const deserializers = {
    "application/json": function (string) {
      return Document.fromJSONString(string);
    },
    "text/html": function (string) {
      return HTMLParser.parse(string).getDocument();
    }
  };
  const serializeToContentType = function (serializable, contentType) {
    const serializer = serializers[contentType];
    if (serializer) {
      return serializer(serializable);
    } else {
      throw new Error("unknown content type: ".concat(contentType));
    }
  };
  const deserializeFromContentType = function (string, contentType) {
    const deserializer = deserializers[contentType];
    if (deserializer) {
      return deserializer(string);
    } else {
      throw new Error("unknown content type: ".concat(contentType));
    }
  };

  var core = /*#__PURE__*/Object.freeze({
    __proto__: null
  });

  class ManagedAttachment extends BasicObject {
    constructor(attachmentManager, attachment) {
      super(...arguments);
      this.attachmentManager = attachmentManager;
      this.attachment = attachment;
      this.id = this.attachment.id;
      this.file = this.attachment.file;
    }
    remove() {
      return this.attachmentManager.requestRemovalOfAttachment(this.attachment);
    }
  }
  ManagedAttachment.proxyMethod("attachment.getAttribute");
  ManagedAttachment.proxyMethod("attachment.hasAttribute");
  ManagedAttachment.proxyMethod("attachment.setAttribute");
  ManagedAttachment.proxyMethod("attachment.getAttributes");
  ManagedAttachment.proxyMethod("attachment.setAttributes");
  ManagedAttachment.proxyMethod("attachment.isPending");
  ManagedAttachment.proxyMethod("attachment.isPreviewable");
  ManagedAttachment.proxyMethod("attachment.getURL");
  ManagedAttachment.proxyMethod("attachment.getHref");
  ManagedAttachment.proxyMethod("attachment.getFilename");
  ManagedAttachment.proxyMethod("attachment.getFilesize");
  ManagedAttachment.proxyMethod("attachment.getFormattedFilesize");
  ManagedAttachment.proxyMethod("attachment.getExtension");
  ManagedAttachment.proxyMethod("attachment.getContentType");
  ManagedAttachment.proxyMethod("attachment.getFile");
  ManagedAttachment.proxyMethod("attachment.setFile");
  ManagedAttachment.proxyMethod("attachment.releaseFile");
  ManagedAttachment.proxyMethod("attachment.getUploadProgress");
  ManagedAttachment.proxyMethod("attachment.setUploadProgress");

  class AttachmentManager extends BasicObject {
    constructor() {
      let attachments = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
      super(...arguments);
      this.managedAttachments = {};
      Array.from(attachments).forEach(attachment => {
        this.manageAttachment(attachment);
      });
    }
    getAttachments() {
      const result = [];
      for (const id in this.managedAttachments) {
        const attachment = this.managedAttachments[id];
        result.push(attachment);
      }
      return result;
    }
    manageAttachment(attachment) {
      if (!this.managedAttachments[attachment.id]) {
        this.managedAttachments[attachment.id] = new ManagedAttachment(this, attachment);
      }
      return this.managedAttachments[attachment.id];
    }
    attachmentIsManaged(attachment) {
      return attachment.id in this.managedAttachments;
    }
    requestRemovalOfAttachment(attachment) {
      if (this.attachmentIsManaged(attachment)) {
        var _this$delegate, _this$delegate$attach;
        return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$attach = _this$delegate.attachmentManagerDidRequestRemovalOfAttachment) === null || _this$delegate$attach === void 0 ? void 0 : _this$delegate$attach.call(_this$delegate, attachment);
      }
    }
    unmanageAttachment(attachment) {
      const managedAttachment = this.managedAttachments[attachment.id];
      delete this.managedAttachments[attachment.id];
      return managedAttachment;
    }
  }

  class LineBreakInsertion {
    constructor(composition) {
      this.composition = composition;
      this.document = this.composition.document;
      const selectedRange = this.composition.getSelectedRange();
      this.startPosition = selectedRange[0];
      this.endPosition = selectedRange[1];
      this.startLocation = this.document.locationFromPosition(this.startPosition);
      this.endLocation = this.document.locationFromPosition(this.endPosition);
      this.block = this.document.getBlockAtIndex(this.endLocation.index);
      this.breaksOnReturn = this.block.breaksOnReturn();
      this.previousCharacter = this.block.text.getStringAtPosition(this.endLocation.offset - 1);
      this.nextCharacter = this.block.text.getStringAtPosition(this.endLocation.offset);
    }
    shouldInsertBlockBreak() {
      if (this.block.hasAttributes() && this.block.isListItem() && !this.block.isEmpty()) {
        return this.startLocation.offset !== 0;
      } else {
        return this.breaksOnReturn && this.nextCharacter !== "\n";
      }
    }
    shouldBreakFormattedBlock() {
      return this.block.hasAttributes() && !this.block.isListItem() && (this.breaksOnReturn && this.nextCharacter === "\n" || this.previousCharacter === "\n");
    }
    shouldDecreaseListLevel() {
      return this.block.hasAttributes() && this.block.isListItem() && this.block.isEmpty();
    }
    shouldPrependListItem() {
      return this.block.isListItem() && this.startLocation.offset === 0 && !this.block.isEmpty();
    }
    shouldRemoveLastBlockAttribute() {
      return this.block.hasAttributes() && !this.block.isListItem() && this.block.isEmpty();
    }
  }

  const PLACEHOLDER = " ";
  class Composition extends BasicObject {
    constructor() {
      super(...arguments);
      this.document = new Document();
      this.attachments = [];
      this.currentAttributes = {};
      this.revision = 0;
    }
    setDocument(document) {
      if (!document.isEqualTo(this.document)) {
        var _this$delegate, _this$delegate$compos;
        this.document = document;
        this.refreshAttachments();
        this.revision++;
        return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$compos = _this$delegate.compositionDidChangeDocument) === null || _this$delegate$compos === void 0 ? void 0 : _this$delegate$compos.call(_this$delegate, document);
      }
    }

    // Snapshots

    getSnapshot() {
      return {
        document: this.document,
        selectedRange: this.getSelectedRange()
      };
    }
    loadSnapshot(_ref) {
      var _this$delegate2, _this$delegate2$compo, _this$delegate3, _this$delegate3$compo;
      let {
        document,
        selectedRange
      } = _ref;
      (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || (_this$delegate2$compo = _this$delegate2.compositionWillLoadSnapshot) === null || _this$delegate2$compo === void 0 || _this$delegate2$compo.call(_this$delegate2);
      this.setDocument(document != null ? document : new Document());
      this.setSelection(selectedRange != null ? selectedRange : [0, 0]);
      return (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 || (_this$delegate3$compo = _this$delegate3.compositionDidLoadSnapshot) === null || _this$delegate3$compo === void 0 ? void 0 : _this$delegate3$compo.call(_this$delegate3);
    }

    // Responder protocol

    insertText(text) {
      let {
        updatePosition
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
        updatePosition: true
      };
      const selectedRange = this.getSelectedRange();
      this.setDocument(this.document.insertTextAtRange(text, selectedRange));
      const startPosition = selectedRange[0];
      const endPosition = startPosition + text.getLength();
      if (updatePosition) {
        this.setSelection(endPosition);
      }
      return this.notifyDelegateOfInsertionAtRange([startPosition, endPosition]);
    }
    insertBlock() {
      let block = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : new Block();
      const document = new Document([block]);
      return this.insertDocument(document);
    }
    insertDocument() {
      let document = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : new Document();
      const selectedRange = this.getSelectedRange();
      this.setDocument(this.document.insertDocumentAtRange(document, selectedRange));
      const startPosition = selectedRange[0];
      const endPosition = startPosition + document.getLength();
      this.setSelection(endPosition);
      return this.notifyDelegateOfInsertionAtRange([startPosition, endPosition]);
    }
    insertString(string, options) {
      const attributes = this.getCurrentTextAttributes();
      const text = Text.textForStringWithAttributes(string, attributes);
      return this.insertText(text, options);
    }
    insertBlockBreak() {
      const selectedRange = this.getSelectedRange();
      this.setDocument(this.document.insertBlockBreakAtRange(selectedRange));
      const startPosition = selectedRange[0];
      const endPosition = startPosition + 1;
      this.setSelection(endPosition);
      return this.notifyDelegateOfInsertionAtRange([startPosition, endPosition]);
    }
    insertLineBreak() {
      const insertion = new LineBreakInsertion(this);
      if (insertion.shouldDecreaseListLevel()) {
        this.decreaseListLevel();
        return this.setSelection(insertion.startPosition);
      } else if (insertion.shouldPrependListItem()) {
        const document = new Document([insertion.block.copyWithoutText()]);
        return this.insertDocument(document);
      } else if (insertion.shouldInsertBlockBreak()) {
        return this.insertBlockBreak();
      } else if (insertion.shouldRemoveLastBlockAttribute()) {
        return this.removeLastBlockAttribute();
      } else if (insertion.shouldBreakFormattedBlock()) {
        return this.breakFormattedBlock(insertion);
      } else {
        return this.insertString("\n");
      }
    }
    insertHTML(html) {
      const document = HTMLParser.parse(html).getDocument();
      const selectedRange = this.getSelectedRange();
      this.setDocument(this.document.mergeDocumentAtRange(document, selectedRange));
      const startPosition = selectedRange[0];
      const endPosition = startPosition + document.getLength() - 1;
      this.setSelection(endPosition);
      return this.notifyDelegateOfInsertionAtRange([startPosition, endPosition]);
    }
    replaceHTML(html) {
      const document = HTMLParser.parse(html).getDocument().copyUsingObjectsFromDocument(this.document);
      const locationRange = this.getLocationRange({
        strict: false
      });
      const selectedRange = this.document.rangeFromLocationRange(locationRange);
      this.setDocument(document);
      return this.setSelection(selectedRange);
    }
    insertFile(file) {
      return this.insertFiles([file]);
    }
    insertFiles(files) {
      const attachments = [];
      Array.from(files).forEach(file => {
        var _this$delegate4;
        if ((_this$delegate4 = this.delegate) !== null && _this$delegate4 !== void 0 && _this$delegate4.compositionShouldAcceptFile(file)) {
          const attachment = Attachment.attachmentForFile(file);
          attachments.push(attachment);
        }
      });
      return this.insertAttachments(attachments);
    }
    insertAttachment(attachment) {
      return this.insertAttachments([attachment]);
    }
    insertAttachments(attachments$1) {
      let text = new Text();
      Array.from(attachments$1).forEach(attachment => {
        var _config$attachments$t;
        const type = attachment.getType();
        const presentation = (_config$attachments$t = attachments[type]) === null || _config$attachments$t === void 0 ? void 0 : _config$attachments$t.presentation;
        const attributes = this.getCurrentTextAttributes();
        if (presentation) {
          attributes.presentation = presentation;
        }
        const attachmentText = Text.textForAttachmentWithAttributes(attachment, attributes);
        text = text.appendText(attachmentText);
      });
      return this.insertText(text);
    }
    shouldManageDeletingInDirection(direction) {
      const locationRange = this.getLocationRange();
      if (rangeIsCollapsed(locationRange)) {
        if (direction === "backward" && locationRange[0].offset === 0) {
          return true;
        }
        if (this.shouldManageMovingCursorInDirection(direction)) {
          return true;
        }
      } else {
        if (locationRange[0].index !== locationRange[1].index) {
          return true;
        }
      }
      return false;
    }
    deleteInDirection(direction) {
      let {
        length
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let attachment, deletingIntoPreviousBlock, selectionSpansBlocks;
      const locationRange = this.getLocationRange();
      let range = this.getSelectedRange();
      const selectionIsCollapsed = rangeIsCollapsed(range);
      if (selectionIsCollapsed) {
        deletingIntoPreviousBlock = direction === "backward" && locationRange[0].offset === 0;
      } else {
        selectionSpansBlocks = locationRange[0].index !== locationRange[1].index;
      }
      if (deletingIntoPreviousBlock) {
        if (this.canDecreaseBlockAttributeLevel()) {
          const block = this.getBlock();
          if (block.isListItem()) {
            this.decreaseListLevel();
          } else {
            this.decreaseBlockAttributeLevel();
          }
          this.setSelection(range[0]);
          if (block.isEmpty()) {
            return false;
          }
        }
      }
      if (selectionIsCollapsed) {
        range = this.getExpandedRangeInDirection(direction, {
          length
        });
        if (direction === "backward") {
          attachment = this.getAttachmentAtRange(range);
        }
      }
      if (attachment) {
        this.editAttachment(attachment);
        return false;
      } else {
        this.setDocument(this.document.removeTextAtRange(range));
        this.setSelection(range[0]);
        if (deletingIntoPreviousBlock || selectionSpansBlocks) {
          return false;
        }
      }
    }
    moveTextFromRange(range) {
      const [position] = Array.from(this.getSelectedRange());
      this.setDocument(this.document.moveTextFromRangeToPosition(range, position));
      return this.setSelection(position);
    }
    removeAttachment(attachment) {
      const range = this.document.getRangeOfAttachment(attachment);
      if (range) {
        this.stopEditingAttachment();
        this.setDocument(this.document.removeTextAtRange(range));
        return this.setSelection(range[0]);
      }
    }
    removeLastBlockAttribute() {
      const [startPosition, endPosition] = Array.from(this.getSelectedRange());
      const block = this.document.getBlockAtPosition(endPosition);
      this.removeCurrentAttribute(block.getLastAttribute());
      return this.setSelection(startPosition);
    }
    insertPlaceholder() {
      this.placeholderPosition = this.getPosition();
      return this.insertString(PLACEHOLDER);
    }
    selectPlaceholder() {
      if (this.placeholderPosition != null) {
        this.setSelectedRange([this.placeholderPosition, this.placeholderPosition + PLACEHOLDER.length]);
        return this.getSelectedRange();
      }
    }
    forgetPlaceholder() {
      this.placeholderPosition = null;
    }

    // Current attributes

    hasCurrentAttribute(attributeName) {
      const value = this.currentAttributes[attributeName];
      return value != null && value !== false;
    }
    toggleCurrentAttribute(attributeName) {
      const value = !this.currentAttributes[attributeName];
      if (value) {
        return this.setCurrentAttribute(attributeName, value);
      } else {
        return this.removeCurrentAttribute(attributeName);
      }
    }
    canSetCurrentAttribute(attributeName) {
      if (getBlockConfig(attributeName)) {
        return this.canSetCurrentBlockAttribute(attributeName);
      } else {
        return this.canSetCurrentTextAttribute(attributeName);
      }
    }
    canSetCurrentTextAttribute(attributeName) {
      const document = this.getSelectedDocument();
      if (!document) return;
      for (const attachment of Array.from(document.getAttachments())) {
        if (!attachment.hasContent()) {
          return false;
        }
      }
      return true;
    }
    canSetCurrentBlockAttribute(attributeName) {
      const block = this.getBlock();
      if (!block) return;
      return !block.isTerminalBlock();
    }
    setCurrentAttribute(attributeName, value) {
      if (getBlockConfig(attributeName)) {
        return this.setBlockAttribute(attributeName, value);
      } else {
        this.setTextAttribute(attributeName, value);
        this.currentAttributes[attributeName] = value;
        return this.notifyDelegateOfCurrentAttributesChange();
      }
    }
    setHTMLAtributeAtPosition(position, attributeName, value) {
      var _getBlockConfig;
      const block = this.document.getBlockAtPosition(position);
      const allowedHTMLAttributes = (_getBlockConfig = getBlockConfig(block.getLastAttribute())) === null || _getBlockConfig === void 0 ? void 0 : _getBlockConfig.htmlAttributes;
      if (block && allowedHTMLAttributes !== null && allowedHTMLAttributes !== void 0 && allowedHTMLAttributes.includes(attributeName)) {
        const newDocument = this.document.setHTMLAttributeAtPosition(position, attributeName, value);
        this.setDocument(newDocument);
      }
    }
    setTextAttribute(attributeName, value) {
      const selectedRange = this.getSelectedRange();
      if (!selectedRange) return;
      const [startPosition, endPosition] = Array.from(selectedRange);
      if (startPosition === endPosition) {
        if (attributeName === "href") {
          const text = Text.textForStringWithAttributes(value, {
            href: value
          });
          return this.insertText(text);
        }
      } else {
        return this.setDocument(this.document.addAttributeAtRange(attributeName, value, selectedRange));
      }
    }
    setBlockAttribute(attributeName, value) {
      const selectedRange = this.getSelectedRange();
      if (this.canSetCurrentAttribute(attributeName)) {
        this.setDocument(this.document.applyBlockAttributeAtRange(attributeName, value, selectedRange));
        return this.setSelection(selectedRange);
      }
    }
    removeCurrentAttribute(attributeName) {
      if (getBlockConfig(attributeName)) {
        this.removeBlockAttribute(attributeName);
        return this.updateCurrentAttributes();
      } else {
        this.removeTextAttribute(attributeName);
        delete this.currentAttributes[attributeName];
        return this.notifyDelegateOfCurrentAttributesChange();
      }
    }
    removeTextAttribute(attributeName) {
      const selectedRange = this.getSelectedRange();
      if (!selectedRange) return;
      return this.setDocument(this.document.removeAttributeAtRange(attributeName, selectedRange));
    }
    removeBlockAttribute(attributeName) {
      const selectedRange = this.getSelectedRange();
      if (!selectedRange) return;
      return this.setDocument(this.document.removeAttributeAtRange(attributeName, selectedRange));
    }
    canDecreaseNestingLevel() {
      var _this$getBlock;
      return ((_this$getBlock = this.getBlock()) === null || _this$getBlock === void 0 ? void 0 : _this$getBlock.getNestingLevel()) > 0;
    }
    canIncreaseNestingLevel() {
      var _getBlockConfig2;
      const block = this.getBlock();
      if (!block) return;
      if ((_getBlockConfig2 = getBlockConfig(block.getLastNestableAttribute())) !== null && _getBlockConfig2 !== void 0 && _getBlockConfig2.listAttribute) {
        const previousBlock = this.getPreviousBlock();
        if (previousBlock) {
          return arrayStartsWith(previousBlock.getListItemAttributes(), block.getListItemAttributes());
        }
      } else {
        return block.getNestingLevel() > 0;
      }
    }
    decreaseNestingLevel() {
      const block = this.getBlock();
      if (!block) return;
      return this.setDocument(this.document.replaceBlock(block, block.decreaseNestingLevel()));
    }
    increaseNestingLevel() {
      const block = this.getBlock();
      if (!block) return;
      return this.setDocument(this.document.replaceBlock(block, block.increaseNestingLevel()));
    }
    canDecreaseBlockAttributeLevel() {
      var _this$getBlock2;
      return ((_this$getBlock2 = this.getBlock()) === null || _this$getBlock2 === void 0 ? void 0 : _this$getBlock2.getAttributeLevel()) > 0;
    }
    decreaseBlockAttributeLevel() {
      var _this$getBlock3;
      const attribute = (_this$getBlock3 = this.getBlock()) === null || _this$getBlock3 === void 0 ? void 0 : _this$getBlock3.getLastAttribute();
      if (attribute) {
        return this.removeCurrentAttribute(attribute);
      }
    }
    decreaseListLevel() {
      let [startPosition] = Array.from(this.getSelectedRange());
      const {
        index
      } = this.document.locationFromPosition(startPosition);
      let endIndex = index;
      const attributeLevel = this.getBlock().getAttributeLevel();
      let block = this.document.getBlockAtIndex(endIndex + 1);
      while (block) {
        if (!block.isListItem() || block.getAttributeLevel() <= attributeLevel) {
          break;
        }
        endIndex++;
        block = this.document.getBlockAtIndex(endIndex + 1);
      }
      startPosition = this.document.positionFromLocation({
        index,
        offset: 0
      });
      const endPosition = this.document.positionFromLocation({
        index: endIndex,
        offset: 0
      });
      return this.setDocument(this.document.removeLastListAttributeAtRange([startPosition, endPosition]));
    }
    updateCurrentAttributes() {
      const selectedRange = this.getSelectedRange({
        ignoreLock: true
      });
      if (selectedRange) {
        const currentAttributes = this.document.getCommonAttributesAtRange(selectedRange);
        Array.from(getAllAttributeNames()).forEach(attributeName => {
          if (!currentAttributes[attributeName]) {
            if (!this.canSetCurrentAttribute(attributeName)) {
              currentAttributes[attributeName] = false;
            }
          }
        });
        if (!objectsAreEqual(currentAttributes, this.currentAttributes)) {
          this.currentAttributes = currentAttributes;
          return this.notifyDelegateOfCurrentAttributesChange();
        }
      }
    }
    getCurrentAttributes() {
      return extend.call({}, this.currentAttributes);
    }
    getCurrentTextAttributes() {
      const attributes = {};
      for (const key in this.currentAttributes) {
        const value = this.currentAttributes[key];
        if (value !== false) {
          if (getTextConfig(key)) {
            attributes[key] = value;
          }
        }
      }
      return attributes;
    }

    // Selection freezing

    freezeSelection() {
      return this.setCurrentAttribute("frozen", true);
    }
    thawSelection() {
      return this.removeCurrentAttribute("frozen");
    }
    hasFrozenSelection() {
      return this.hasCurrentAttribute("frozen");
    }
    setSelection(selectedRange) {
      var _this$delegate5;
      const locationRange = this.document.locationRangeFromRange(selectedRange);
      return (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 ? void 0 : _this$delegate5.compositionDidRequestChangingSelectionToLocationRange(locationRange);
    }
    getSelectedRange() {
      const locationRange = this.getLocationRange();
      if (locationRange) {
        return this.document.rangeFromLocationRange(locationRange);
      }
    }
    setSelectedRange(selectedRange) {
      const locationRange = this.document.locationRangeFromRange(selectedRange);
      return this.getSelectionManager().setLocationRange(locationRange);
    }
    getPosition() {
      const locationRange = this.getLocationRange();
      if (locationRange) {
        return this.document.positionFromLocation(locationRange[0]);
      }
    }
    getLocationRange(options) {
      if (this.targetLocationRange) {
        return this.targetLocationRange;
      } else {
        return this.getSelectionManager().getLocationRange(options) || normalizeRange({
          index: 0,
          offset: 0
        });
      }
    }
    withTargetLocationRange(locationRange, fn) {
      let result;
      this.targetLocationRange = locationRange;
      try {
        result = fn();
      } finally {
        this.targetLocationRange = null;
      }
      return result;
    }
    withTargetRange(range, fn) {
      const locationRange = this.document.locationRangeFromRange(range);
      return this.withTargetLocationRange(locationRange, fn);
    }
    withTargetDOMRange(domRange, fn) {
      const locationRange = this.createLocationRangeFromDOMRange(domRange, {
        strict: false
      });
      return this.withTargetLocationRange(locationRange, fn);
    }
    getExpandedRangeInDirection(direction) {
      let {
        length
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      let [startPosition, endPosition] = Array.from(this.getSelectedRange());
      if (direction === "backward") {
        if (length) {
          startPosition -= length;
        } else {
          startPosition = this.translateUTF16PositionFromOffset(startPosition, -1);
        }
      } else {
        if (length) {
          endPosition += length;
        } else {
          endPosition = this.translateUTF16PositionFromOffset(endPosition, 1);
        }
      }
      return normalizeRange([startPosition, endPosition]);
    }
    shouldManageMovingCursorInDirection(direction) {
      if (this.editingAttachment) {
        return true;
      }
      const range = this.getExpandedRangeInDirection(direction);
      return this.getAttachmentAtRange(range) != null;
    }
    moveCursorInDirection(direction) {
      let canEditAttachment, range;
      if (this.editingAttachment) {
        range = this.document.getRangeOfAttachment(this.editingAttachment);
      } else {
        const selectedRange = this.getSelectedRange();
        range = this.getExpandedRangeInDirection(direction);
        canEditAttachment = !rangesAreEqual(selectedRange, range);
      }
      if (direction === "backward") {
        this.setSelectedRange(range[0]);
      } else {
        this.setSelectedRange(range[1]);
      }
      if (canEditAttachment) {
        const attachment = this.getAttachmentAtRange(range);
        if (attachment) {
          return this.editAttachment(attachment);
        }
      }
    }
    expandSelectionInDirection(direction) {
      let {
        length
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      const range = this.getExpandedRangeInDirection(direction, {
        length
      });
      return this.setSelectedRange(range);
    }
    expandSelectionForEditing() {
      if (this.hasCurrentAttribute("href")) {
        return this.expandSelectionAroundCommonAttribute("href");
      }
    }
    expandSelectionAroundCommonAttribute(attributeName) {
      const position = this.getPosition();
      const range = this.document.getRangeOfCommonAttributeAtPosition(attributeName, position);
      return this.setSelectedRange(range);
    }
    selectionContainsAttachments() {
      var _this$getSelectedAtta;
      return ((_this$getSelectedAtta = this.getSelectedAttachments()) === null || _this$getSelectedAtta === void 0 ? void 0 : _this$getSelectedAtta.length) > 0;
    }
    selectionIsInCursorTarget() {
      return this.editingAttachment || this.positionIsCursorTarget(this.getPosition());
    }
    positionIsCursorTarget(position) {
      const location = this.document.locationFromPosition(position);
      if (location) {
        return this.locationIsCursorTarget(location);
      }
    }
    positionIsBlockBreak(position) {
      var _this$document$getPie;
      return (_this$document$getPie = this.document.getPieceAtPosition(position)) === null || _this$document$getPie === void 0 ? void 0 : _this$document$getPie.isBlockBreak();
    }
    getSelectedDocument() {
      const selectedRange = this.getSelectedRange();
      if (selectedRange) {
        return this.document.getDocumentAtRange(selectedRange);
      }
    }
    getSelectedAttachments() {
      var _this$getSelectedDocu;
      return (_this$getSelectedDocu = this.getSelectedDocument()) === null || _this$getSelectedDocu === void 0 ? void 0 : _this$getSelectedDocu.getAttachments();
    }

    // Attachments

    getAttachments() {
      return this.attachments.slice(0);
    }
    refreshAttachments() {
      const attachments = this.document.getAttachments();
      const {
        added,
        removed
      } = summarizeArrayChange(this.attachments, attachments);
      this.attachments = attachments;
      Array.from(removed).forEach(attachment => {
        var _this$delegate6, _this$delegate6$compo;
        attachment.delegate = null;
        (_this$delegate6 = this.delegate) === null || _this$delegate6 === void 0 || (_this$delegate6$compo = _this$delegate6.compositionDidRemoveAttachment) === null || _this$delegate6$compo === void 0 || _this$delegate6$compo.call(_this$delegate6, attachment);
      });
      return (() => {
        const result = [];
        Array.from(added).forEach(attachment => {
          var _this$delegate7, _this$delegate7$compo;
          attachment.delegate = this;
          result.push((_this$delegate7 = this.delegate) === null || _this$delegate7 === void 0 || (_this$delegate7$compo = _this$delegate7.compositionDidAddAttachment) === null || _this$delegate7$compo === void 0 ? void 0 : _this$delegate7$compo.call(_this$delegate7, attachment));
        });
        return result;
      })();
    }

    // Attachment delegate

    attachmentDidChangeAttributes(attachment) {
      var _this$delegate8, _this$delegate8$compo;
      this.revision++;
      return (_this$delegate8 = this.delegate) === null || _this$delegate8 === void 0 || (_this$delegate8$compo = _this$delegate8.compositionDidEditAttachment) === null || _this$delegate8$compo === void 0 ? void 0 : _this$delegate8$compo.call(_this$delegate8, attachment);
    }
    attachmentDidChangePreviewURL(attachment) {
      var _this$delegate9, _this$delegate9$compo;
      this.revision++;
      return (_this$delegate9 = this.delegate) === null || _this$delegate9 === void 0 || (_this$delegate9$compo = _this$delegate9.compositionDidChangeAttachmentPreviewURL) === null || _this$delegate9$compo === void 0 ? void 0 : _this$delegate9$compo.call(_this$delegate9, attachment);
    }

    // Attachment editing

    editAttachment(attachment, options) {
      var _this$delegate10, _this$delegate10$comp;
      if (attachment === this.editingAttachment) return;
      this.stopEditingAttachment();
      this.editingAttachment = attachment;
      return (_this$delegate10 = this.delegate) === null || _this$delegate10 === void 0 || (_this$delegate10$comp = _this$delegate10.compositionDidStartEditingAttachment) === null || _this$delegate10$comp === void 0 ? void 0 : _this$delegate10$comp.call(_this$delegate10, this.editingAttachment, options);
    }
    stopEditingAttachment() {
      var _this$delegate11, _this$delegate11$comp;
      if (!this.editingAttachment) return;
      (_this$delegate11 = this.delegate) === null || _this$delegate11 === void 0 || (_this$delegate11$comp = _this$delegate11.compositionDidStopEditingAttachment) === null || _this$delegate11$comp === void 0 || _this$delegate11$comp.call(_this$delegate11, this.editingAttachment);
      this.editingAttachment = null;
    }
    updateAttributesForAttachment(attributes, attachment) {
      return this.setDocument(this.document.updateAttributesForAttachment(attributes, attachment));
    }
    removeAttributeForAttachment(attribute, attachment) {
      return this.setDocument(this.document.removeAttributeForAttachment(attribute, attachment));
    }

    // Private

    breakFormattedBlock(insertion) {
      let {
        document
      } = insertion;
      const {
        block
      } = insertion;
      let position = insertion.startPosition;
      let range = [position - 1, position];
      if (block.getBlockBreakPosition() === insertion.startLocation.offset) {
        if (block.breaksOnReturn() && insertion.nextCharacter === "\n") {
          position += 1;
        } else {
          document = document.removeTextAtRange(range);
        }
        range = [position, position];
      } else if (insertion.nextCharacter === "\n") {
        if (insertion.previousCharacter === "\n") {
          range = [position - 1, position + 1];
        } else {
          range = [position, position + 1];
          position += 1;
        }
      } else if (insertion.startLocation.offset - 1 !== 0) {
        position += 1;
      }
      const newDocument = new Document([block.removeLastAttribute().copyWithoutText()]);
      this.setDocument(document.insertDocumentAtRange(newDocument, range));
      return this.setSelection(position);
    }
    getPreviousBlock() {
      const locationRange = this.getLocationRange();
      if (locationRange) {
        const {
          index
        } = locationRange[0];
        if (index > 0) {
          return this.document.getBlockAtIndex(index - 1);
        }
      }
    }
    getBlock() {
      const locationRange = this.getLocationRange();
      if (locationRange) {
        return this.document.getBlockAtIndex(locationRange[0].index);
      }
    }
    getAttachmentAtRange(range) {
      const document = this.document.getDocumentAtRange(range);
      if (document.toString() === "".concat(OBJECT_REPLACEMENT_CHARACTER, "\n")) {
        return document.getAttachments()[0];
      }
    }
    notifyDelegateOfCurrentAttributesChange() {
      var _this$delegate12, _this$delegate12$comp;
      return (_this$delegate12 = this.delegate) === null || _this$delegate12 === void 0 || (_this$delegate12$comp = _this$delegate12.compositionDidChangeCurrentAttributes) === null || _this$delegate12$comp === void 0 ? void 0 : _this$delegate12$comp.call(_this$delegate12, this.currentAttributes);
    }
    notifyDelegateOfInsertionAtRange(range) {
      var _this$delegate13, _this$delegate13$comp;
      return (_this$delegate13 = this.delegate) === null || _this$delegate13 === void 0 || (_this$delegate13$comp = _this$delegate13.compositionDidPerformInsertionAtRange) === null || _this$delegate13$comp === void 0 ? void 0 : _this$delegate13$comp.call(_this$delegate13, range);
    }
    translateUTF16PositionFromOffset(position, offset) {
      const utf16string = this.document.toUTF16String();
      const utf16position = utf16string.offsetFromUCS2Offset(position);
      return utf16string.offsetToUCS2Offset(utf16position + offset);
    }
  }
  Composition.proxyMethod("getSelectionManager().getPointRange");
  Composition.proxyMethod("getSelectionManager().setLocationRangeFromPointRange");
  Composition.proxyMethod("getSelectionManager().createLocationRangeFromDOMRange");
  Composition.proxyMethod("getSelectionManager().locationIsCursorTarget");
  Composition.proxyMethod("getSelectionManager().selectionIsExpanded");
  Composition.proxyMethod("delegate?.getSelectionManager");

  class UndoManager extends BasicObject {
    constructor(composition) {
      super(...arguments);
      this.composition = composition;
      this.undoEntries = [];
      this.redoEntries = [];
    }
    recordUndoEntry(description) {
      let {
        context,
        consolidatable
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      const previousEntry = this.undoEntries.slice(-1)[0];
      if (!consolidatable || !entryHasDescriptionAndContext(previousEntry, description, context)) {
        const undoEntry = this.createEntry({
          description,
          context
        });
        this.undoEntries.push(undoEntry);
        this.redoEntries = [];
      }
    }
    undo() {
      const undoEntry = this.undoEntries.pop();
      if (undoEntry) {
        const redoEntry = this.createEntry(undoEntry);
        this.redoEntries.push(redoEntry);
        return this.composition.loadSnapshot(undoEntry.snapshot);
      }
    }
    redo() {
      const redoEntry = this.redoEntries.pop();
      if (redoEntry) {
        const undoEntry = this.createEntry(redoEntry);
        this.undoEntries.push(undoEntry);
        return this.composition.loadSnapshot(redoEntry.snapshot);
      }
    }
    canUndo() {
      return this.undoEntries.length > 0;
    }
    canRedo() {
      return this.redoEntries.length > 0;
    }

    // Private

    createEntry() {
      let {
        description,
        context
      } = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      return {
        description: description === null || description === void 0 ? void 0 : description.toString(),
        context: JSON.stringify(context),
        snapshot: this.composition.getSnapshot()
      };
    }
  }
  const entryHasDescriptionAndContext = (entry, description, context) => (entry === null || entry === void 0 ? void 0 : entry.description) === (description === null || description === void 0 ? void 0 : description.toString()) && (entry === null || entry === void 0 ? void 0 : entry.context) === JSON.stringify(context);

  const BLOCK_ATTRIBUTE_NAME = "attachmentGallery";
  const TEXT_ATTRIBUTE_NAME = "presentation";
  const TEXT_ATTRIBUTE_VALUE = "gallery";
  class Filter {
    constructor(snapshot) {
      this.document = snapshot.document;
      this.selectedRange = snapshot.selectedRange;
    }
    perform() {
      this.removeBlockAttribute();
      return this.applyBlockAttribute();
    }
    getSnapshot() {
      return {
        document: this.document,
        selectedRange: this.selectedRange
      };
    }

    // Private

    removeBlockAttribute() {
      return this.findRangesOfBlocks().map(range => this.document = this.document.removeAttributeAtRange(BLOCK_ATTRIBUTE_NAME, range));
    }
    applyBlockAttribute() {
      let offset = 0;
      this.findRangesOfPieces().forEach(range => {
        if (range[1] - range[0] > 1) {
          range[0] += offset;
          range[1] += offset;
          if (this.document.getCharacterAtPosition(range[1]) !== "\n") {
            this.document = this.document.insertBlockBreakAtRange(range[1]);
            if (range[1] < this.selectedRange[1]) {
              this.moveSelectedRangeForward();
            }
            range[1]++;
            offset++;
          }
          if (range[0] !== 0) {
            if (this.document.getCharacterAtPosition(range[0] - 1) !== "\n") {
              this.document = this.document.insertBlockBreakAtRange(range[0]);
              if (range[0] < this.selectedRange[0]) {
                this.moveSelectedRangeForward();
              }
              range[0]++;
              offset++;
            }
          }
          this.document = this.document.applyBlockAttributeAtRange(BLOCK_ATTRIBUTE_NAME, true, range);
        }
      });
    }
    findRangesOfBlocks() {
      return this.document.findRangesForBlockAttribute(BLOCK_ATTRIBUTE_NAME);
    }
    findRangesOfPieces() {
      return this.document.findRangesForTextAttribute(TEXT_ATTRIBUTE_NAME, {
        withValue: TEXT_ATTRIBUTE_VALUE
      });
    }
    moveSelectedRangeForward() {
      this.selectedRange[0] += 1;
      this.selectedRange[1] += 1;
    }
  }

  const attachmentGalleryFilter = function (snapshot) {
    const filter = new Filter(snapshot);
    filter.perform();
    return filter.getSnapshot();
  };

  const DEFAULT_FILTERS = [attachmentGalleryFilter];
  class Editor {
    constructor(composition, selectionManager, element) {
      this.insertFiles = this.insertFiles.bind(this);
      this.composition = composition;
      this.selectionManager = selectionManager;
      this.element = element;
      this.undoManager = new UndoManager(this.composition);
      this.filters = DEFAULT_FILTERS.slice(0);
    }
    loadDocument(document) {
      return this.loadSnapshot({
        document,
        selectedRange: [0, 0]
      });
    }
    loadHTML() {
      let html = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "";
      const document = HTMLParser.parse(html, {
        referenceElement: this.element
      }).getDocument();
      return this.loadDocument(document);
    }
    loadJSON(_ref) {
      let {
        document,
        selectedRange
      } = _ref;
      document = Document.fromJSON(document);
      return this.loadSnapshot({
        document,
        selectedRange
      });
    }
    loadSnapshot(snapshot) {
      this.undoManager = new UndoManager(this.composition);
      return this.composition.loadSnapshot(snapshot);
    }
    getDocument() {
      return this.composition.document;
    }
    getSelectedDocument() {
      return this.composition.getSelectedDocument();
    }
    getSnapshot() {
      return this.composition.getSnapshot();
    }
    toJSON() {
      return this.getSnapshot();
    }

    // Document manipulation

    deleteInDirection(direction) {
      return this.composition.deleteInDirection(direction);
    }
    insertAttachment(attachment) {
      return this.composition.insertAttachment(attachment);
    }
    insertAttachments(attachments) {
      return this.composition.insertAttachments(attachments);
    }
    insertDocument(document) {
      return this.composition.insertDocument(document);
    }
    insertFile(file) {
      return this.composition.insertFile(file);
    }
    insertFiles(files) {
      return this.composition.insertFiles(files);
    }
    insertHTML(html) {
      return this.composition.insertHTML(html);
    }
    insertString(string) {
      return this.composition.insertString(string);
    }
    insertText(text) {
      return this.composition.insertText(text);
    }
    insertLineBreak() {
      return this.composition.insertLineBreak();
    }

    // Selection

    getSelectedRange() {
      return this.composition.getSelectedRange();
    }
    getPosition() {
      return this.composition.getPosition();
    }
    getClientRectAtPosition(position) {
      const locationRange = this.getDocument().locationRangeFromRange([position, position + 1]);
      return this.selectionManager.getClientRectAtLocationRange(locationRange);
    }
    expandSelectionInDirection(direction) {
      return this.composition.expandSelectionInDirection(direction);
    }
    moveCursorInDirection(direction) {
      return this.composition.moveCursorInDirection(direction);
    }
    setSelectedRange(selectedRange) {
      return this.composition.setSelectedRange(selectedRange);
    }

    // Attributes

    activateAttribute(name) {
      let value = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
      return this.composition.setCurrentAttribute(name, value);
    }
    attributeIsActive(name) {
      return this.composition.hasCurrentAttribute(name);
    }
    canActivateAttribute(name) {
      return this.composition.canSetCurrentAttribute(name);
    }
    deactivateAttribute(name) {
      return this.composition.removeCurrentAttribute(name);
    }

    // HTML attributes
    setHTMLAtributeAtPosition(position, name, value) {
      this.composition.setHTMLAtributeAtPosition(position, name, value);
    }

    // Nesting level

    canDecreaseNestingLevel() {
      return this.composition.canDecreaseNestingLevel();
    }
    canIncreaseNestingLevel() {
      return this.composition.canIncreaseNestingLevel();
    }
    decreaseNestingLevel() {
      if (this.canDecreaseNestingLevel()) {
        return this.composition.decreaseNestingLevel();
      }
    }
    increaseNestingLevel() {
      if (this.canIncreaseNestingLevel()) {
        return this.composition.increaseNestingLevel();
      }
    }

    // Undo/redo

    canRedo() {
      return this.undoManager.canRedo();
    }
    canUndo() {
      return this.undoManager.canUndo();
    }
    recordUndoEntry(description) {
      let {
        context,
        consolidatable
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
      return this.undoManager.recordUndoEntry(description, {
        context,
        consolidatable
      });
    }
    redo() {
      if (this.canRedo()) {
        return this.undoManager.redo();
      }
    }
    undo() {
      if (this.canUndo()) {
        return this.undoManager.undo();
      }
    }
  }

  /* eslint-disable
      no-var,
      prefer-const,
  */
  class LocationMapper {
    constructor(element) {
      this.element = element;
    }
    findLocationFromContainerAndOffset(container, offset) {
      let {
        strict
      } = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {
        strict: true
      };
      let childIndex = 0;
      let foundBlock = false;
      const location = {
        index: 0,
        offset: 0
      };
      const attachmentElement = this.findAttachmentElementParentForNode(container);
      if (attachmentElement) {
        container = attachmentElement.parentNode;
        offset = findChildIndexOfNode(attachmentElement);
      }
      const walker = walkTree(this.element, {
        usingFilter: rejectAttachmentContents
      });
      while (walker.nextNode()) {
        const node = walker.currentNode;
        if (node === container && nodeIsTextNode(container)) {
          if (!nodeIsCursorTarget(node)) {
            location.offset += offset;
          }
          break;
        } else {
          if (node.parentNode === container) {
            if (childIndex++ === offset) {
              break;
            }
          } else if (!elementContainsNode(container, node)) {
            if (childIndex > 0) {
              break;
            }
          }
          if (nodeIsBlockStart(node, {
            strict
          })) {
            if (foundBlock) {
              location.index++;
            }
            location.offset = 0;
            foundBlock = true;
          } else {
            location.offset += nodeLength(node);
          }
        }
      }
      return location;
    }
    findContainerAndOffsetFromLocation(location) {
      let container, offset;
      if (location.index === 0 && location.offset === 0) {
        container = this.element;
        offset = 0;
        while (container.firstChild) {
          container = container.firstChild;
          if (nodeIsBlockContainer(container)) {
            offset = 1;
            break;
          }
        }
        return [container, offset];
      }
      let [node, nodeOffset] = this.findNodeAndOffsetFromLocation(location);
      if (!node) return;
      if (nodeIsTextNode(node)) {
        if (nodeLength(node) === 0) {
          container = node.parentNode.parentNode;
          offset = findChildIndexOfNode(node.parentNode);
          if (nodeIsCursorTarget(node, {
            name: "right"
          })) {
            offset++;
          }
        } else {
          container = node;
          offset = location.offset - nodeOffset;
        }
      } else {
        container = node.parentNode;
        if (!nodeIsBlockStart(node.previousSibling)) {
          if (!nodeIsBlockContainer(container)) {
            while (node === container.lastChild) {
              node = container;
              container = container.parentNode;
              if (nodeIsBlockContainer(container)) {
                break;
              }
            }
          }
        }
        offset = findChildIndexOfNode(node);
        if (location.offset !== 0) {
          offset++;
        }
      }
      return [container, offset];
    }
    findNodeAndOffsetFromLocation(location) {
      let node, nodeOffset;
      let offset = 0;
      for (const currentNode of this.getSignificantNodesForIndex(location.index)) {
        const length = nodeLength(currentNode);
        if (location.offset <= offset + length) {
          if (nodeIsTextNode(currentNode)) {
            node = currentNode;
            nodeOffset = offset;
            if (location.offset === nodeOffset && nodeIsCursorTarget(node)) {
              break;
            }
          } else if (!node) {
            node = currentNode;
            nodeOffset = offset;
          }
        }
        offset += length;
        if (offset > location.offset) {
          break;
        }
      }
      return [node, nodeOffset];
    }

    // Private

    findAttachmentElementParentForNode(node) {
      while (node && node !== this.element) {
        if (nodeIsAttachmentElement(node)) {
          return node;
        }
        node = node.parentNode;
      }
    }
    getSignificantNodesForIndex(index) {
      const nodes = [];
      const walker = walkTree(this.element, {
        usingFilter: acceptSignificantNodes
      });
      let recordingNodes = false;
      while (walker.nextNode()) {
        const node = walker.currentNode;
        if (nodeIsBlockStartComment(node)) {
          var blockIndex;
          if (blockIndex != null) {
            blockIndex++;
          } else {
            blockIndex = 0;
          }
          if (blockIndex === index) {
            recordingNodes = true;
          } else if (recordingNodes) {
            break;
          }
        } else if (recordingNodes) {
          nodes.push(node);
        }
      }
      return nodes;
    }
  }
  const nodeLength = function (node) {
    if (node.nodeType === Node.TEXT_NODE) {
      if (nodeIsCursorTarget(node)) {
        return 0;
      } else {
        const string = node.textContent;
        return string.length;
      }
    } else if (tagName(node) === "br" || nodeIsAttachmentElement(node)) {
      return 1;
    } else {
      return 0;
    }
  };
  const acceptSignificantNodes = function (node) {
    if (rejectEmptyTextNodes(node) === NodeFilter.FILTER_ACCEPT) {
      return rejectAttachmentContents(node);
    } else {
      return NodeFilter.FILTER_REJECT;
    }
  };
  const rejectEmptyTextNodes = function (node) {
    if (nodeIsEmptyTextNode(node)) {
      return NodeFilter.FILTER_REJECT;
    } else {
      return NodeFilter.FILTER_ACCEPT;
    }
  };
  const rejectAttachmentContents = function (node) {
    if (nodeIsAttachmentElement(node.parentNode)) {
      return NodeFilter.FILTER_REJECT;
    } else {
      return NodeFilter.FILTER_ACCEPT;
    }
  };

  /* eslint-disable
      id-length,
      no-empty,
  */
  class PointMapper {
    createDOMRangeFromPoint(_ref) {
      let {
        x,
        y
      } = _ref;
      let domRange;
      if (document.caretPositionFromPoint) {
        const {
          offsetNode,
          offset
        } = document.caretPositionFromPoint(x, y);
        domRange = document.createRange();
        domRange.setStart(offsetNode, offset);
        return domRange;
      } else if (document.caretRangeFromPoint) {
        return document.caretRangeFromPoint(x, y);
      } else if (document.body.createTextRange) {
        const originalDOMRange = getDOMRange();
        try {
          // IE 11 throws "Unspecified error" when using moveToPoint
          // during a drag-and-drop operation.
          const textRange = document.body.createTextRange();
          textRange.moveToPoint(x, y);
          textRange.select();
        } catch (error) {}
        domRange = getDOMRange();
        setDOMRange(originalDOMRange);
        return domRange;
      }
    }
    getClientRectsForDOMRange(domRange) {
      const array = Array.from(domRange.getClientRects());
      const start = array[0];
      const end = array[array.length - 1];
      return [start, end];
    }
  }

  /* eslint-disable
  */
  class SelectionManager extends BasicObject {
    constructor(element) {
      super(...arguments);
      this.didMouseDown = this.didMouseDown.bind(this);
      this.selectionDidChange = this.selectionDidChange.bind(this);
      this.element = element;
      this.locationMapper = new LocationMapper(this.element);
      this.pointMapper = new PointMapper();
      this.lockCount = 0;
      handleEvent("mousedown", {
        onElement: this.element,
        withCallback: this.didMouseDown
      });
    }
    getLocationRange() {
      let options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      if (options.strict === false) {
        return this.createLocationRangeFromDOMRange(getDOMRange());
      } else if (options.ignoreLock) {
        return this.currentLocationRange;
      } else if (this.lockedLocationRange) {
        return this.lockedLocationRange;
      } else {
        return this.currentLocationRange;
      }
    }
    setLocationRange(locationRange) {
      if (this.lockedLocationRange) return;
      locationRange = normalizeRange(locationRange);
      const domRange = this.createDOMRangeFromLocationRange(locationRange);
      if (domRange) {
        setDOMRange(domRange);
        this.updateCurrentLocationRange(locationRange);
      }
    }
    setLocationRangeFromPointRange(pointRange) {
      pointRange = normalizeRange(pointRange);
      const startLocation = this.getLocationAtPoint(pointRange[0]);
      const endLocation = this.getLocationAtPoint(pointRange[1]);
      this.setLocationRange([startLocation, endLocation]);
    }
    getClientRectAtLocationRange(locationRange) {
      const domRange = this.createDOMRangeFromLocationRange(locationRange);
      if (domRange) {
        return this.getClientRectsForDOMRange(domRange)[1];
      }
    }
    locationIsCursorTarget(location) {
      const node = Array.from(this.findNodeAndOffsetFromLocation(location))[0];
      return nodeIsCursorTarget(node);
    }
    lock() {
      if (this.lockCount++ === 0) {
        this.updateCurrentLocationRange();
        this.lockedLocationRange = this.getLocationRange();
      }
    }
    unlock() {
      if (--this.lockCount === 0) {
        const {
          lockedLocationRange
        } = this;
        this.lockedLocationRange = null;
        if (lockedLocationRange != null) {
          return this.setLocationRange(lockedLocationRange);
        }
      }
    }
    clearSelection() {
      var _getDOMSelection;
      return (_getDOMSelection = getDOMSelection()) === null || _getDOMSelection === void 0 ? void 0 : _getDOMSelection.removeAllRanges();
    }
    selectionIsCollapsed() {
      var _getDOMRange;
      return ((_getDOMRange = getDOMRange()) === null || _getDOMRange === void 0 ? void 0 : _getDOMRange.collapsed) === true;
    }
    selectionIsExpanded() {
      return !this.selectionIsCollapsed();
    }
    createLocationRangeFromDOMRange(domRange, options) {
      if (domRange == null || !this.domRangeWithinElement(domRange)) return;
      const start = this.findLocationFromContainerAndOffset(domRange.startContainer, domRange.startOffset, options);
      if (!start) return;
      const end = domRange.collapsed ? undefined : this.findLocationFromContainerAndOffset(domRange.endContainer, domRange.endOffset, options);
      return normalizeRange([start, end]);
    }
    didMouseDown() {
      return this.pauseTemporarily();
    }
    pauseTemporarily() {
      let resumeHandlers;
      this.paused = true;
      const resume = () => {
        this.paused = false;
        clearTimeout(resumeTimeout);
        Array.from(resumeHandlers).forEach(handler => {
          handler.destroy();
        });
        if (elementContainsNode(document, this.element)) {
          return this.selectionDidChange();
        }
      };
      const resumeTimeout = setTimeout(resume, 200);
      resumeHandlers = ["mousemove", "keydown"].map(eventName => handleEvent(eventName, {
        onElement: document,
        withCallback: resume
      }));
    }
    selectionDidChange() {
      if (!this.paused && !innerElementIsActive(this.element)) {
        return this.updateCurrentLocationRange();
      }
    }
    updateCurrentLocationRange(locationRange) {
      if (locationRange != null ? locationRange : locationRange = this.createLocationRangeFromDOMRange(getDOMRange())) {
        if (!rangesAreEqual(locationRange, this.currentLocationRange)) {
          var _this$delegate, _this$delegate$locati;
          this.currentLocationRange = locationRange;
          return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$locati = _this$delegate.locationRangeDidChange) === null || _this$delegate$locati === void 0 ? void 0 : _this$delegate$locati.call(_this$delegate, this.currentLocationRange.slice(0));
        }
      }
    }
    createDOMRangeFromLocationRange(locationRange) {
      const rangeStart = this.findContainerAndOffsetFromLocation(locationRange[0]);
      const rangeEnd = rangeIsCollapsed(locationRange) ? rangeStart : this.findContainerAndOffsetFromLocation(locationRange[1]) || rangeStart;
      if (rangeStart != null && rangeEnd != null) {
        const domRange = document.createRange();
        domRange.setStart(...Array.from(rangeStart || []));
        domRange.setEnd(...Array.from(rangeEnd || []));
        return domRange;
      }
    }
    getLocationAtPoint(point) {
      const domRange = this.createDOMRangeFromPoint(point);
      if (domRange) {
        var _this$createLocationR;
        return (_this$createLocationR = this.createLocationRangeFromDOMRange(domRange)) === null || _this$createLocationR === void 0 ? void 0 : _this$createLocationR[0];
      }
    }
    domRangeWithinElement(domRange) {
      if (domRange.collapsed) {
        return elementContainsNode(this.element, domRange.startContainer);
      } else {
        return elementContainsNode(this.element, domRange.startContainer) && elementContainsNode(this.element, domRange.endContainer);
      }
    }
  }
  SelectionManager.proxyMethod("locationMapper.findLocationFromContainerAndOffset");
  SelectionManager.proxyMethod("locationMapper.findContainerAndOffsetFromLocation");
  SelectionManager.proxyMethod("locationMapper.findNodeAndOffsetFromLocation");
  SelectionManager.proxyMethod("pointMapper.createDOMRangeFromPoint");
  SelectionManager.proxyMethod("pointMapper.getClientRectsForDOMRange");

  var models = /*#__PURE__*/Object.freeze({
    __proto__: null,
    Attachment: Attachment,
    AttachmentManager: AttachmentManager,
    AttachmentPiece: AttachmentPiece,
    Block: Block,
    Composition: Composition,
    Document: Document,
    Editor: Editor,
    HTMLParser: HTMLParser,
    HTMLSanitizer: HTMLSanitizer,
    LineBreakInsertion: LineBreakInsertion,
    LocationMapper: LocationMapper,
    ManagedAttachment: ManagedAttachment,
    Piece: Piece,
    PointMapper: PointMapper,
    SelectionManager: SelectionManager,
    SplittableList: SplittableList,
    StringPiece: StringPiece,
    Text: Text,
    UndoManager: UndoManager
  });

  var views = /*#__PURE__*/Object.freeze({
    __proto__: null,
    ObjectView: ObjectView,
    AttachmentView: AttachmentView,
    BlockView: BlockView,
    DocumentView: DocumentView,
    PieceView: PieceView,
    PreviewableAttachmentView: PreviewableAttachmentView,
    TextView: TextView
  });

  const {
    lang,
    css,
    keyNames: keyNames$1
  } = config;
  const undoable = function (fn) {
    return function () {
      const commands = fn.apply(this, arguments);
      commands.do();
      if (!this.undos) {
        this.undos = [];
      }
      this.undos.push(commands.undo);
    };
  };
  class AttachmentEditorController extends BasicObject {
    constructor(attachmentPiece, _element, container) {
      let options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
      super(...arguments);
      // Installing and uninstalling
      _defineProperty(this, "makeElementMutable", undoable(() => {
        return {
          do: () => {
            this.element.dataset.trixMutable = true;
          },
          undo: () => delete this.element.dataset.trixMutable
        };
      }));
      _defineProperty(this, "addToolbar", undoable(() => {
        // <div class="#{css.attachmentMetadataContainer}" data-trix-mutable="true">
        //   <div class="trix-button-row">
        //     <span class="trix-button-group trix-button-group--actions">
        //       <button type="button" class="trix-button trix-button--remove" title="#{lang.remove}" data-trix-action="remove">#{lang.remove}</button>
        //     </span>
        //   </div>
        // </div>
        const element = makeElement({
          tagName: "div",
          className: css.attachmentToolbar,
          data: {
            trixMutable: true
          },
          childNodes: makeElement({
            tagName: "div",
            className: "trix-button-row",
            childNodes: makeElement({
              tagName: "span",
              className: "trix-button-group trix-button-group--actions",
              childNodes: makeElement({
                tagName: "button",
                className: "trix-button trix-button--remove",
                textContent: lang.remove,
                attributes: {
                  title: lang.remove
                },
                data: {
                  trixAction: "remove"
                }
              })
            })
          })
        });
        if (this.attachment.isPreviewable()) {
          // <div class="#{css.attachmentMetadataContainer}">
          //   <span class="#{css.attachmentMetadata}">
          //     <span class="#{css.attachmentName}" title="#{name}">#{name}</span>
          //     <span class="#{css.attachmentSize}">#{size}</span>
          //   </span>
          // </div>
          element.appendChild(makeElement({
            tagName: "div",
            className: css.attachmentMetadataContainer,
            childNodes: makeElement({
              tagName: "span",
              className: css.attachmentMetadata,
              childNodes: [makeElement({
                tagName: "span",
                className: css.attachmentName,
                textContent: this.attachment.getFilename(),
                attributes: {
                  title: this.attachment.getFilename()
                }
              }), makeElement({
                tagName: "span",
                className: css.attachmentSize,
                textContent: this.attachment.getFormattedFilesize()
              })]
            })
          }));
        }
        handleEvent("click", {
          onElement: element,
          withCallback: this.didClickToolbar
        });
        handleEvent("click", {
          onElement: element,
          matchingSelector: "[data-trix-action]",
          withCallback: this.didClickActionButton
        });
        triggerEvent("trix-attachment-before-toolbar", {
          onElement: this.element,
          attributes: {
            toolbar: element,
            attachment: this.attachment
          }
        });
        return {
          do: () => this.element.appendChild(element),
          undo: () => removeNode(element)
        };
      }));
      _defineProperty(this, "installCaptionEditor", undoable(() => {
        const textarea = makeElement({
          tagName: "textarea",
          className: css.attachmentCaptionEditor,
          attributes: {
            placeholder: lang.captionPlaceholder
          },
          data: {
            trixMutable: true
          }
        });
        textarea.value = this.attachmentPiece.getCaption();
        const textareaClone = textarea.cloneNode();
        textareaClone.classList.add("trix-autoresize-clone");
        textareaClone.tabIndex = -1;
        const autoresize = function () {
          textareaClone.value = textarea.value;
          textarea.style.height = textareaClone.scrollHeight + "px";
        };
        handleEvent("input", {
          onElement: textarea,
          withCallback: autoresize
        });
        handleEvent("input", {
          onElement: textarea,
          withCallback: this.didInputCaption
        });
        handleEvent("keydown", {
          onElement: textarea,
          withCallback: this.didKeyDownCaption
        });
        handleEvent("change", {
          onElement: textarea,
          withCallback: this.didChangeCaption
        });
        handleEvent("blur", {
          onElement: textarea,
          withCallback: this.didBlurCaption
        });
        const figcaption = this.element.querySelector("figcaption");
        const editingFigcaption = figcaption.cloneNode();
        return {
          do: () => {
            figcaption.style.display = "none";
            editingFigcaption.appendChild(textarea);
            editingFigcaption.appendChild(textareaClone);
            editingFigcaption.classList.add("".concat(css.attachmentCaption, "--editing"));
            figcaption.parentElement.insertBefore(editingFigcaption, figcaption);
            autoresize();
            if (this.options.editCaption) {
              return defer(() => textarea.focus());
            }
          },
          undo() {
            removeNode(editingFigcaption);
            figcaption.style.display = null;
          }
        };
      }));
      this.didClickToolbar = this.didClickToolbar.bind(this);
      this.didClickActionButton = this.didClickActionButton.bind(this);
      this.didKeyDownCaption = this.didKeyDownCaption.bind(this);
      this.didInputCaption = this.didInputCaption.bind(this);
      this.didChangeCaption = this.didChangeCaption.bind(this);
      this.didBlurCaption = this.didBlurCaption.bind(this);
      this.attachmentPiece = attachmentPiece;
      this.element = _element;
      this.container = container;
      this.options = options;
      this.attachment = this.attachmentPiece.attachment;
      if (tagName(this.element) === "a") {
        this.element = this.element.firstChild;
      }
      this.install();
    }
    install() {
      this.makeElementMutable();
      this.addToolbar();
      if (this.attachment.isPreviewable()) {
        this.installCaptionEditor();
      }
    }
    uninstall() {
      var _this$delegate;
      let undo = this.undos.pop();
      this.savePendingCaption();
      while (undo) {
        undo();
        undo = this.undos.pop();
      }
      (_this$delegate = this.delegate) === null || _this$delegate === void 0 || _this$delegate.didUninstallAttachmentEditor(this);
    }

    // Private

    savePendingCaption() {
      if (this.pendingCaption != null) {
        const caption = this.pendingCaption;
        this.pendingCaption = null;
        if (caption) {
          var _this$delegate2, _this$delegate2$attac;
          (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || (_this$delegate2$attac = _this$delegate2.attachmentEditorDidRequestUpdatingAttributesForAttachment) === null || _this$delegate2$attac === void 0 || _this$delegate2$attac.call(_this$delegate2, {
            caption
          }, this.attachment);
        } else {
          var _this$delegate3, _this$delegate3$attac;
          (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 || (_this$delegate3$attac = _this$delegate3.attachmentEditorDidRequestRemovingAttributeForAttachment) === null || _this$delegate3$attac === void 0 || _this$delegate3$attac.call(_this$delegate3, "caption", this.attachment);
        }
      }
    }
    // Event handlers

    didClickToolbar(event) {
      event.preventDefault();
      return event.stopPropagation();
    }
    didClickActionButton(event) {
      var _this$delegate4;
      const action = event.target.getAttribute("data-trix-action");
      switch (action) {
        case "remove":
          return (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 ? void 0 : _this$delegate4.attachmentEditorDidRequestRemovalOfAttachment(this.attachment);
      }
    }
    didKeyDownCaption(event) {
      if (keyNames$1[event.keyCode] === "return") {
        var _this$delegate5, _this$delegate5$attac;
        event.preventDefault();
        this.savePendingCaption();
        return (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || (_this$delegate5$attac = _this$delegate5.attachmentEditorDidRequestDeselectingAttachment) === null || _this$delegate5$attac === void 0 ? void 0 : _this$delegate5$attac.call(_this$delegate5, this.attachment);
      }
    }
    didInputCaption(event) {
      this.pendingCaption = event.target.value.replace(/\s/g, " ").trim();
    }
    didChangeCaption(event) {
      return this.savePendingCaption();
    }
    didBlurCaption(event) {
      return this.savePendingCaption();
    }
  }

  class CompositionController extends BasicObject {
    constructor(element, composition) {
      super(...arguments);
      this.didFocus = this.didFocus.bind(this);
      this.didBlur = this.didBlur.bind(this);
      this.didClickAttachment = this.didClickAttachment.bind(this);
      this.element = element;
      this.composition = composition;
      this.documentView = new DocumentView(this.composition.document, {
        element: this.element
      });
      handleEvent("focus", {
        onElement: this.element,
        withCallback: this.didFocus
      });
      handleEvent("blur", {
        onElement: this.element,
        withCallback: this.didBlur
      });
      handleEvent("click", {
        onElement: this.element,
        matchingSelector: "a[contenteditable=false]",
        preventDefault: true
      });
      handleEvent("mousedown", {
        onElement: this.element,
        matchingSelector: attachmentSelector,
        withCallback: this.didClickAttachment
      });
      handleEvent("click", {
        onElement: this.element,
        matchingSelector: "a".concat(attachmentSelector),
        preventDefault: true
      });
    }
    didFocus(event) {
      var _this$blurPromise;
      const perform = () => {
        if (!this.focused) {
          var _this$delegate, _this$delegate$compos;
          this.focused = true;
          return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$compos = _this$delegate.compositionControllerDidFocus) === null || _this$delegate$compos === void 0 ? void 0 : _this$delegate$compos.call(_this$delegate);
        }
      };
      return ((_this$blurPromise = this.blurPromise) === null || _this$blurPromise === void 0 ? void 0 : _this$blurPromise.then(perform)) || perform();
    }
    didBlur(event) {
      this.blurPromise = new Promise(resolve => {
        return defer(() => {
          if (!innerElementIsActive(this.element)) {
            var _this$delegate2, _this$delegate2$compo;
            this.focused = null;
            (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || (_this$delegate2$compo = _this$delegate2.compositionControllerDidBlur) === null || _this$delegate2$compo === void 0 || _this$delegate2$compo.call(_this$delegate2);
          }
          this.blurPromise = null;
          return resolve();
        });
      });
    }
    didClickAttachment(event, target) {
      var _this$delegate3, _this$delegate3$compo;
      const attachment = this.findAttachmentForElement(target);
      const editCaption = !!findClosestElementFromNode(event.target, {
        matchingSelector: "figcaption"
      });
      return (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 || (_this$delegate3$compo = _this$delegate3.compositionControllerDidSelectAttachment) === null || _this$delegate3$compo === void 0 ? void 0 : _this$delegate3$compo.call(_this$delegate3, attachment, {
        editCaption
      });
    }
    getSerializableElement() {
      if (this.isEditingAttachment()) {
        return this.documentView.shadowElement;
      } else {
        return this.element;
      }
    }
    render() {
      var _this$delegate6, _this$delegate6$compo;
      if (this.revision !== this.composition.revision) {
        this.documentView.setDocument(this.composition.document);
        this.documentView.render();
        this.revision = this.composition.revision;
      }
      if (this.canSyncDocumentView() && !this.documentView.isSynced()) {
        var _this$delegate4, _this$delegate4$compo, _this$delegate5, _this$delegate5$compo;
        (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 || (_this$delegate4$compo = _this$delegate4.compositionControllerWillSyncDocumentView) === null || _this$delegate4$compo === void 0 || _this$delegate4$compo.call(_this$delegate4);
        this.documentView.sync();
        (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || (_this$delegate5$compo = _this$delegate5.compositionControllerDidSyncDocumentView) === null || _this$delegate5$compo === void 0 || _this$delegate5$compo.call(_this$delegate5);
      }
      return (_this$delegate6 = this.delegate) === null || _this$delegate6 === void 0 || (_this$delegate6$compo = _this$delegate6.compositionControllerDidRender) === null || _this$delegate6$compo === void 0 ? void 0 : _this$delegate6$compo.call(_this$delegate6);
    }
    rerenderViewForObject(object) {
      this.invalidateViewForObject(object);
      return this.render();
    }
    invalidateViewForObject(object) {
      return this.documentView.invalidateViewForObject(object);
    }
    isViewCachingEnabled() {
      return this.documentView.isViewCachingEnabled();
    }
    enableViewCaching() {
      return this.documentView.enableViewCaching();
    }
    disableViewCaching() {
      return this.documentView.disableViewCaching();
    }
    refreshViewCache() {
      return this.documentView.garbageCollectCachedViews();
    }

    // Attachment editor management

    isEditingAttachment() {
      return !!this.attachmentEditor;
    }
    installAttachmentEditorForAttachment(attachment, options) {
      var _this$attachmentEdito;
      if (((_this$attachmentEdito = this.attachmentEditor) === null || _this$attachmentEdito === void 0 ? void 0 : _this$attachmentEdito.attachment) === attachment) return;
      const element = this.documentView.findElementForObject(attachment);
      if (!element) return;
      this.uninstallAttachmentEditor();
      const attachmentPiece = this.composition.document.getAttachmentPieceForAttachment(attachment);
      this.attachmentEditor = new AttachmentEditorController(attachmentPiece, element, this.element, options);
      this.attachmentEditor.delegate = this;
    }
    uninstallAttachmentEditor() {
      var _this$attachmentEdito2;
      return (_this$attachmentEdito2 = this.attachmentEditor) === null || _this$attachmentEdito2 === void 0 ? void 0 : _this$attachmentEdito2.uninstall();
    }

    // Attachment controller delegate

    didUninstallAttachmentEditor() {
      this.attachmentEditor = null;
      return this.render();
    }
    attachmentEditorDidRequestUpdatingAttributesForAttachment(attributes, attachment) {
      var _this$delegate7, _this$delegate7$compo;
      (_this$delegate7 = this.delegate) === null || _this$delegate7 === void 0 || (_this$delegate7$compo = _this$delegate7.compositionControllerWillUpdateAttachment) === null || _this$delegate7$compo === void 0 || _this$delegate7$compo.call(_this$delegate7, attachment);
      return this.composition.updateAttributesForAttachment(attributes, attachment);
    }
    attachmentEditorDidRequestRemovingAttributeForAttachment(attribute, attachment) {
      var _this$delegate8, _this$delegate8$compo;
      (_this$delegate8 = this.delegate) === null || _this$delegate8 === void 0 || (_this$delegate8$compo = _this$delegate8.compositionControllerWillUpdateAttachment) === null || _this$delegate8$compo === void 0 || _this$delegate8$compo.call(_this$delegate8, attachment);
      return this.composition.removeAttributeForAttachment(attribute, attachment);
    }
    attachmentEditorDidRequestRemovalOfAttachment(attachment) {
      var _this$delegate9, _this$delegate9$compo;
      return (_this$delegate9 = this.delegate) === null || _this$delegate9 === void 0 || (_this$delegate9$compo = _this$delegate9.compositionControllerDidRequestRemovalOfAttachment) === null || _this$delegate9$compo === void 0 ? void 0 : _this$delegate9$compo.call(_this$delegate9, attachment);
    }
    attachmentEditorDidRequestDeselectingAttachment(attachment) {
      var _this$delegate10, _this$delegate10$comp;
      return (_this$delegate10 = this.delegate) === null || _this$delegate10 === void 0 || (_this$delegate10$comp = _this$delegate10.compositionControllerDidRequestDeselectingAttachment) === null || _this$delegate10$comp === void 0 ? void 0 : _this$delegate10$comp.call(_this$delegate10, attachment);
    }

    // Private

    canSyncDocumentView() {
      return !this.isEditingAttachment();
    }
    findAttachmentForElement(element) {
      return this.composition.document.getAttachmentById(parseInt(element.dataset.trixId, 10));
    }
  }

  class Controller extends BasicObject {}

  const mutableAttributeName = "data-trix-mutable";
  const mutableSelector = "[".concat(mutableAttributeName, "]");
  const options = {
    attributes: true,
    childList: true,
    characterData: true,
    characterDataOldValue: true,
    subtree: true
  };
  class MutationObserver extends BasicObject {
    constructor(element) {
      super(element);
      this.didMutate = this.didMutate.bind(this);
      this.element = element;
      this.observer = new window.MutationObserver(this.didMutate);
      this.start();
    }
    start() {
      this.reset();
      return this.observer.observe(this.element, options);
    }
    stop() {
      return this.observer.disconnect();
    }
    didMutate(mutations) {
      this.mutations.push(...Array.from(this.findSignificantMutations(mutations) || []));
      if (this.mutations.length) {
        var _this$delegate, _this$delegate$elemen;
        (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$elemen = _this$delegate.elementDidMutate) === null || _this$delegate$elemen === void 0 || _this$delegate$elemen.call(_this$delegate, this.getMutationSummary());
        return this.reset();
      }
    }

    // Private

    reset() {
      this.mutations = [];
    }
    findSignificantMutations(mutations) {
      return mutations.filter(mutation => {
        return this.mutationIsSignificant(mutation);
      });
    }
    mutationIsSignificant(mutation) {
      if (this.nodeIsMutable(mutation.target)) {
        return false;
      }
      for (const node of Array.from(this.nodesModifiedByMutation(mutation))) {
        if (this.nodeIsSignificant(node)) return true;
      }
      return false;
    }
    nodeIsSignificant(node) {
      return node !== this.element && !this.nodeIsMutable(node) && !nodeIsEmptyTextNode(node);
    }
    nodeIsMutable(node) {
      return findClosestElementFromNode(node, {
        matchingSelector: mutableSelector
      });
    }
    nodesModifiedByMutation(mutation) {
      const nodes = [];
      switch (mutation.type) {
        case "attributes":
          if (mutation.attributeName !== mutableAttributeName) {
            nodes.push(mutation.target);
          }
          break;
        case "characterData":
          // Changes to text nodes should consider the parent element
          nodes.push(mutation.target.parentNode);
          nodes.push(mutation.target);
          break;
        case "childList":
          // Consider each added or removed node
          nodes.push(...Array.from(mutation.addedNodes || []));
          nodes.push(...Array.from(mutation.removedNodes || []));
          break;
      }
      return nodes;
    }
    getMutationSummary() {
      return this.getTextMutationSummary();
    }
    getTextMutationSummary() {
      const {
        additions,
        deletions
      } = this.getTextChangesFromCharacterData();
      const textChanges = this.getTextChangesFromChildList();
      Array.from(textChanges.additions).forEach(addition => {
        if (!Array.from(additions).includes(addition)) {
          additions.push(addition);
        }
      });
      deletions.push(...Array.from(textChanges.deletions || []));
      const summary = {};
      const added = additions.join("");
      if (added) {
        summary.textAdded = added;
      }
      const deleted = deletions.join("");
      if (deleted) {
        summary.textDeleted = deleted;
      }
      return summary;
    }
    getMutationsByType(type) {
      return Array.from(this.mutations).filter(mutation => mutation.type === type);
    }
    getTextChangesFromChildList() {
      let textAdded, textRemoved;
      const addedNodes = [];
      const removedNodes = [];
      Array.from(this.getMutationsByType("childList")).forEach(mutation => {
        addedNodes.push(...Array.from(mutation.addedNodes || []));
        removedNodes.push(...Array.from(mutation.removedNodes || []));
      });
      const singleBlockCommentRemoved = addedNodes.length === 0 && removedNodes.length === 1 && nodeIsBlockStartComment(removedNodes[0]);
      if (singleBlockCommentRemoved) {
        textAdded = [];
        textRemoved = ["\n"];
      } else {
        textAdded = getTextForNodes(addedNodes);
        textRemoved = getTextForNodes(removedNodes);
      }
      const additions = textAdded.filter((text, index) => text !== textRemoved[index]).map(normalizeSpaces);
      const deletions = textRemoved.filter((text, index) => text !== textAdded[index]).map(normalizeSpaces);
      return {
        additions,
        deletions
      };
    }
    getTextChangesFromCharacterData() {
      let added, removed;
      const characterMutations = this.getMutationsByType("characterData");
      if (characterMutations.length) {
        const startMutation = characterMutations[0],
          endMutation = characterMutations[characterMutations.length - 1];
        const oldString = normalizeSpaces(startMutation.oldValue);
        const newString = normalizeSpaces(endMutation.target.data);
        const summarized = summarizeStringChange(oldString, newString);
        added = summarized.added;
        removed = summarized.removed;
      }
      return {
        additions: added ? [added] : [],
        deletions: removed ? [removed] : []
      };
    }
  }
  const getTextForNodes = function () {
    let nodes = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
    const text = [];
    for (const node of Array.from(nodes)) {
      switch (node.nodeType) {
        case Node.TEXT_NODE:
          text.push(node.data);
          break;
        case Node.ELEMENT_NODE:
          if (tagName(node) === "br") {
            text.push("\n");
          } else {
            text.push(...Array.from(getTextForNodes(node.childNodes) || []));
          }
          break;
      }
    }
    return text;
  };

  /* eslint-disable
      no-empty,
  */
  class FileVerificationOperation extends Operation {
    constructor(file) {
      super(...arguments);
      this.file = file;
    }
    perform(callback) {
      const reader = new FileReader();
      reader.onerror = () => callback(false);
      reader.onload = () => {
        reader.onerror = null;
        try {
          reader.abort();
        } catch (error) {}
        return callback(true, this.file);
      };
      return reader.readAsArrayBuffer(this.file);
    }
  }

  // Each software keyboard on Android emits its own set of events and some of them can be buggy.
  // This class detects when some buggy events are being emitted and lets know the input controller
  // that they should be ignored.
  class FlakyAndroidKeyboardDetector {
    constructor(element) {
      this.element = element;
    }
    shouldIgnore(event) {
      if (!browser$1.samsungAndroid) return false;
      this.previousEvent = this.event;
      this.event = event;
      this.checkSamsungKeyboardBuggyModeStart();
      this.checkSamsungKeyboardBuggyModeEnd();
      return this.buggyMode;
    }

    // private

    // The Samsung keyboard on Android can enter a buggy state in which it emits a flurry of confused events that,
    // if processed, corrupts the editor. The buggy mode always starts with an insertText event, right after a
    // keydown event with for an "Unidentified" key, with the same text as the editor element, except for a few
    // extra whitespace, or exotic utf8, characters.
    checkSamsungKeyboardBuggyModeStart() {
      if (this.insertingLongTextAfterUnidentifiedChar() && differsInWhitespace(this.element.innerText, this.event.data)) {
        this.buggyMode = true;
        this.event.preventDefault();
      }
    }

    // The flurry of buggy events are always insertText. If we see any other type, it means it's over.
    checkSamsungKeyboardBuggyModeEnd() {
      if (this.buggyMode && this.event.inputType !== "insertText") {
        this.buggyMode = false;
      }
    }
    insertingLongTextAfterUnidentifiedChar() {
      var _this$event$data;
      return this.isBeforeInputInsertText() && this.previousEventWasUnidentifiedKeydown() && ((_this$event$data = this.event.data) === null || _this$event$data === void 0 ? void 0 : _this$event$data.length) > 50;
    }
    isBeforeInputInsertText() {
      return this.event.type === "beforeinput" && this.event.inputType === "insertText";
    }
    previousEventWasUnidentifiedKeydown() {
      var _this$previousEvent, _this$previousEvent2;
      return ((_this$previousEvent = this.previousEvent) === null || _this$previousEvent === void 0 ? void 0 : _this$previousEvent.type) === "keydown" && ((_this$previousEvent2 = this.previousEvent) === null || _this$previousEvent2 === void 0 ? void 0 : _this$previousEvent2.key) === "Unidentified";
    }
  }
  const differsInWhitespace = (text1, text2) => {
    return normalize(text1) === normalize(text2);
  };
  const whiteSpaceNormalizerRegexp = new RegExp("(".concat(OBJECT_REPLACEMENT_CHARACTER, "|").concat(ZERO_WIDTH_SPACE, "|").concat(NON_BREAKING_SPACE, "|\\s)+"), "g");
  const normalize = text => text.replace(whiteSpaceNormalizerRegexp, " ").trim();

  class InputController extends BasicObject {
    constructor(element) {
      super(...arguments);
      this.element = element;
      this.mutationObserver = new MutationObserver(this.element);
      this.mutationObserver.delegate = this;
      this.flakyKeyboardDetector = new FlakyAndroidKeyboardDetector(this.element);
      for (const eventName in this.constructor.events) {
        handleEvent(eventName, {
          onElement: this.element,
          withCallback: this.handlerFor(eventName)
        });
      }
    }
    elementDidMutate(mutationSummary) {}
    editorWillSyncDocumentView() {
      return this.mutationObserver.stop();
    }
    editorDidSyncDocumentView() {
      return this.mutationObserver.start();
    }
    requestRender() {
      var _this$delegate, _this$delegate$inputC;
      return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$inputC = _this$delegate.inputControllerDidRequestRender) === null || _this$delegate$inputC === void 0 ? void 0 : _this$delegate$inputC.call(_this$delegate);
    }
    requestReparse() {
      var _this$delegate2, _this$delegate2$input;
      (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || (_this$delegate2$input = _this$delegate2.inputControllerDidRequestReparse) === null || _this$delegate2$input === void 0 || _this$delegate2$input.call(_this$delegate2);
      return this.requestRender();
    }
    attachFiles(files) {
      const operations = Array.from(files).map(file => new FileVerificationOperation(file));
      return Promise.all(operations).then(files => {
        this.handleInput(function () {
          var _this$delegate3, _this$responder;
          (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 || _this$delegate3.inputControllerWillAttachFiles();
          (_this$responder = this.responder) === null || _this$responder === void 0 || _this$responder.insertFiles(files);
          return this.requestRender();
        });
      });
    }

    // Private

    handlerFor(eventName) {
      return event => {
        if (!event.defaultPrevented) {
          this.handleInput(() => {
            if (!innerElementIsActive(this.element)) {
              if (this.flakyKeyboardDetector.shouldIgnore(event)) return;
              this.eventName = eventName;
              this.constructor.events[eventName].call(this, event);
            }
          });
        }
      };
    }
    handleInput(callback) {
      try {
        var _this$delegate4;
        (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 || _this$delegate4.inputControllerWillHandleInput();
        callback.call(this);
      } finally {
        var _this$delegate5;
        (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || _this$delegate5.inputControllerDidHandleInput();
      }
    }
    createLinkHTML(href, text) {
      const link = document.createElement("a");
      link.href = href;
      link.textContent = text ? text : href;
      return link.outerHTML;
    }
  }
  _defineProperty(InputController, "events", {});

  var _$codePointAt, _;
  const {
    browser,
    keyNames
  } = config;
  let pastedFileCount = 0;
  class Level0InputController extends InputController {
    constructor() {
      super(...arguments);
      this.resetInputSummary();
    }
    setInputSummary() {
      let summary = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
      this.inputSummary.eventName = this.eventName;
      for (const key in summary) {
        const value = summary[key];
        this.inputSummary[key] = value;
      }
      return this.inputSummary;
    }
    resetInputSummary() {
      this.inputSummary = {};
    }
    reset() {
      this.resetInputSummary();
      return selectionChangeObserver.reset();
    }

    // Mutation observer delegate

    elementDidMutate(mutationSummary) {
      if (this.isComposing()) {
        var _this$delegate, _this$delegate$inputC;
        return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$inputC = _this$delegate.inputControllerDidAllowUnhandledInput) === null || _this$delegate$inputC === void 0 ? void 0 : _this$delegate$inputC.call(_this$delegate);
      } else {
        return this.handleInput(function () {
          if (this.mutationIsSignificant(mutationSummary)) {
            if (this.mutationIsExpected(mutationSummary)) {
              this.requestRender();
            } else {
              this.requestReparse();
            }
          }
          return this.reset();
        });
      }
    }
    mutationIsExpected(_ref) {
      let {
        textAdded,
        textDeleted
      } = _ref;
      if (this.inputSummary.preferDocument) {
        return true;
      }
      const mutationAdditionMatchesSummary = textAdded != null ? textAdded === this.inputSummary.textAdded : !this.inputSummary.textAdded;
      const mutationDeletionMatchesSummary = textDeleted != null ? this.inputSummary.didDelete : !this.inputSummary.didDelete;
      const unexpectedNewlineAddition = ["\n", " \n"].includes(textAdded) && !mutationAdditionMatchesSummary;
      const unexpectedNewlineDeletion = textDeleted === "\n" && !mutationDeletionMatchesSummary;
      const singleUnexpectedNewline = unexpectedNewlineAddition && !unexpectedNewlineDeletion || unexpectedNewlineDeletion && !unexpectedNewlineAddition;
      if (singleUnexpectedNewline) {
        const range = this.getSelectedRange();
        if (range) {
          var _this$responder;
          const offset = unexpectedNewlineAddition ? textAdded.replace(/\n$/, "").length || -1 : (textAdded === null || textAdded === void 0 ? void 0 : textAdded.length) || 1;
          if ((_this$responder = this.responder) !== null && _this$responder !== void 0 && _this$responder.positionIsBlockBreak(range[1] + offset)) {
            return true;
          }
        }
      }
      return mutationAdditionMatchesSummary && mutationDeletionMatchesSummary;
    }
    mutationIsSignificant(mutationSummary) {
      var _this$compositionInpu;
      const textChanged = Object.keys(mutationSummary).length > 0;
      const composedEmptyString = ((_this$compositionInpu = this.compositionInput) === null || _this$compositionInpu === void 0 ? void 0 : _this$compositionInpu.getEndData()) === "";
      return textChanged || !composedEmptyString;
    }

    // Private

    getCompositionInput() {
      if (this.isComposing()) {
        return this.compositionInput;
      } else {
        this.compositionInput = new CompositionInput(this);
      }
    }
    isComposing() {
      return this.compositionInput && !this.compositionInput.isEnded();
    }
    deleteInDirection(direction, event) {
      var _this$responder2;
      if (((_this$responder2 = this.responder) === null || _this$responder2 === void 0 ? void 0 : _this$responder2.deleteInDirection(direction)) === false) {
        if (event) {
          event.preventDefault();
          return this.requestRender();
        }
      } else {
        return this.setInputSummary({
          didDelete: true
        });
      }
    }
    serializeSelectionToDataTransfer(dataTransfer) {
      var _this$responder3;
      if (!dataTransferIsWritable(dataTransfer)) return;
      const document = (_this$responder3 = this.responder) === null || _this$responder3 === void 0 ? void 0 : _this$responder3.getSelectedDocument().toSerializableDocument();
      dataTransfer.setData("application/x-trix-document", JSON.stringify(document));
      dataTransfer.setData("text/html", DocumentView.render(document).innerHTML);
      dataTransfer.setData("text/plain", document.toString().replace(/\n$/, ""));
      return true;
    }
    canAcceptDataTransfer(dataTransfer) {
      const types = {};
      Array.from((dataTransfer === null || dataTransfer === void 0 ? void 0 : dataTransfer.types) || []).forEach(type => {
        types[type] = true;
      });
      return types.Files || types["application/x-trix-document"] || types["text/html"] || types["text/plain"];
    }
    getPastedHTMLUsingHiddenElement(callback) {
      const selectedRange = this.getSelectedRange();
      const style = {
        position: "absolute",
        left: "".concat(window.pageXOffset, "px"),
        top: "".concat(window.pageYOffset, "px"),
        opacity: 0
      };
      const element = makeElement({
        style,
        tagName: "div",
        editable: true
      });
      document.body.appendChild(element);
      element.focus();
      return requestAnimationFrame(() => {
        const html = element.innerHTML;
        removeNode(element);
        this.setSelectedRange(selectedRange);
        return callback(html);
      });
    }
  }
  _defineProperty(Level0InputController, "events", {
    keydown(event) {
      if (!this.isComposing()) {
        this.resetInputSummary();
      }
      this.inputSummary.didInput = true;
      const keyName = keyNames[event.keyCode];
      if (keyName) {
        var _context2;
        let context = this.keys;
        ["ctrl", "alt", "shift", "meta"].forEach(modifier => {
          if (event["".concat(modifier, "Key")]) {
            var _context;
            if (modifier === "ctrl") {
              modifier = "control";
            }
            context = (_context = context) === null || _context === void 0 ? void 0 : _context[modifier];
          }
        });
        if (((_context2 = context) === null || _context2 === void 0 ? void 0 : _context2[keyName]) != null) {
          this.setInputSummary({
            keyName
          });
          selectionChangeObserver.reset();
          context[keyName].call(this, event);
        }
      }
      if (keyEventIsKeyboardCommand(event)) {
        const character = String.fromCharCode(event.keyCode).toLowerCase();
        if (character) {
          var _this$delegate3;
          const keys = ["alt", "shift"].map(modifier => {
            if (event["".concat(modifier, "Key")]) {
              return modifier;
            }
          }).filter(key => key);
          keys.push(character);
          if ((_this$delegate3 = this.delegate) !== null && _this$delegate3 !== void 0 && _this$delegate3.inputControllerDidReceiveKeyboardCommand(keys)) {
            event.preventDefault();
          }
        }
      }
    },
    keypress(event) {
      if (this.inputSummary.eventName != null) return;
      if (event.metaKey) return;
      if (event.ctrlKey && !event.altKey) return;
      const string = stringFromKeyEvent(event);
      if (string) {
        var _this$delegate4, _this$responder9;
        (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 || _this$delegate4.inputControllerWillPerformTyping();
        (_this$responder9 = this.responder) === null || _this$responder9 === void 0 || _this$responder9.insertString(string);
        return this.setInputSummary({
          textAdded: string,
          didDelete: this.selectionIsExpanded()
        });
      }
    },
    textInput(event) {
      // Handle autocapitalization
      const {
        data
      } = event;
      const {
        textAdded
      } = this.inputSummary;
      if (textAdded && textAdded !== data && textAdded.toUpperCase() === data) {
        var _this$responder10;
        const range = this.getSelectedRange();
        this.setSelectedRange([range[0], range[1] + textAdded.length]);
        (_this$responder10 = this.responder) === null || _this$responder10 === void 0 || _this$responder10.insertString(data);
        this.setInputSummary({
          textAdded: data
        });
        return this.setSelectedRange(range);
      }
    },
    dragenter(event) {
      event.preventDefault();
    },
    dragstart(event) {
      var _this$delegate5, _this$delegate5$input;
      this.serializeSelectionToDataTransfer(event.dataTransfer);
      this.draggedRange = this.getSelectedRange();
      return (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || (_this$delegate5$input = _this$delegate5.inputControllerDidStartDrag) === null || _this$delegate5$input === void 0 ? void 0 : _this$delegate5$input.call(_this$delegate5);
    },
    dragover(event) {
      if (this.draggedRange || this.canAcceptDataTransfer(event.dataTransfer)) {
        event.preventDefault();
        const draggingPoint = {
          x: event.clientX,
          y: event.clientY
        };
        if (!objectsAreEqual(draggingPoint, this.draggingPoint)) {
          var _this$delegate6, _this$delegate6$input;
          this.draggingPoint = draggingPoint;
          return (_this$delegate6 = this.delegate) === null || _this$delegate6 === void 0 || (_this$delegate6$input = _this$delegate6.inputControllerDidReceiveDragOverPoint) === null || _this$delegate6$input === void 0 ? void 0 : _this$delegate6$input.call(_this$delegate6, this.draggingPoint);
        }
      }
    },
    dragend(event) {
      var _this$delegate7, _this$delegate7$input;
      (_this$delegate7 = this.delegate) === null || _this$delegate7 === void 0 || (_this$delegate7$input = _this$delegate7.inputControllerDidCancelDrag) === null || _this$delegate7$input === void 0 || _this$delegate7$input.call(_this$delegate7);
      this.draggedRange = null;
      this.draggingPoint = null;
    },
    drop(event) {
      var _event$dataTransfer, _this$responder11;
      event.preventDefault();
      const files = (_event$dataTransfer = event.dataTransfer) === null || _event$dataTransfer === void 0 ? void 0 : _event$dataTransfer.files;
      const documentJSON = event.dataTransfer.getData("application/x-trix-document");
      const point = {
        x: event.clientX,
        y: event.clientY
      };
      (_this$responder11 = this.responder) === null || _this$responder11 === void 0 || _this$responder11.setLocationRangeFromPointRange(point);
      if (files !== null && files !== void 0 && files.length) {
        this.attachFiles(files);
      } else if (this.draggedRange) {
        var _this$delegate8, _this$responder12;
        (_this$delegate8 = this.delegate) === null || _this$delegate8 === void 0 || _this$delegate8.inputControllerWillMoveText();
        (_this$responder12 = this.responder) === null || _this$responder12 === void 0 || _this$responder12.moveTextFromRange(this.draggedRange);
        this.draggedRange = null;
        this.requestRender();
      } else if (documentJSON) {
        var _this$responder13;
        const document = Document.fromJSONString(documentJSON);
        (_this$responder13 = this.responder) === null || _this$responder13 === void 0 || _this$responder13.insertDocument(document);
        this.requestRender();
      }
      this.draggedRange = null;
      this.draggingPoint = null;
    },
    cut(event) {
      var _this$responder14;
      if ((_this$responder14 = this.responder) !== null && _this$responder14 !== void 0 && _this$responder14.selectionIsExpanded()) {
        var _this$delegate9;
        if (this.serializeSelectionToDataTransfer(event.clipboardData)) {
          event.preventDefault();
        }
        (_this$delegate9 = this.delegate) === null || _this$delegate9 === void 0 || _this$delegate9.inputControllerWillCutText();
        this.deleteInDirection("backward");
        if (event.defaultPrevented) {
          return this.requestRender();
        }
      }
    },
    copy(event) {
      var _this$responder15;
      if ((_this$responder15 = this.responder) !== null && _this$responder15 !== void 0 && _this$responder15.selectionIsExpanded()) {
        if (this.serializeSelectionToDataTransfer(event.clipboardData)) {
          event.preventDefault();
        }
      }
    },
    paste(event) {
      const clipboard = event.clipboardData || event.testClipboardData;
      const paste = {
        clipboard
      };
      if (!clipboard || pasteEventIsCrippledSafariHTMLPaste(event)) {
        this.getPastedHTMLUsingHiddenElement(html => {
          var _this$delegate10, _this$responder16, _this$delegate11;
          paste.type = "text/html";
          paste.html = html;
          (_this$delegate10 = this.delegate) === null || _this$delegate10 === void 0 || _this$delegate10.inputControllerWillPaste(paste);
          (_this$responder16 = this.responder) === null || _this$responder16 === void 0 || _this$responder16.insertHTML(paste.html);
          this.requestRender();
          return (_this$delegate11 = this.delegate) === null || _this$delegate11 === void 0 ? void 0 : _this$delegate11.inputControllerDidPaste(paste);
        });
        return;
      }
      const href = clipboard.getData("URL");
      const html = clipboard.getData("text/html");
      const name = clipboard.getData("public.url-name");
      if (href) {
        var _this$delegate12, _this$responder17, _this$delegate13;
        let string;
        paste.type = "text/html";
        if (name) {
          string = squishBreakableWhitespace(name).trim();
        } else {
          string = href;
        }
        paste.html = this.createLinkHTML(href, string);
        (_this$delegate12 = this.delegate) === null || _this$delegate12 === void 0 || _this$delegate12.inputControllerWillPaste(paste);
        this.setInputSummary({
          textAdded: string,
          didDelete: this.selectionIsExpanded()
        });
        (_this$responder17 = this.responder) === null || _this$responder17 === void 0 || _this$responder17.insertHTML(paste.html);
        this.requestRender();
        (_this$delegate13 = this.delegate) === null || _this$delegate13 === void 0 || _this$delegate13.inputControllerDidPaste(paste);
      } else if (dataTransferIsPlainText(clipboard)) {
        var _this$delegate14, _this$responder18, _this$delegate15;
        paste.type = "text/plain";
        paste.string = clipboard.getData("text/plain");
        (_this$delegate14 = this.delegate) === null || _this$delegate14 === void 0 || _this$delegate14.inputControllerWillPaste(paste);
        this.setInputSummary({
          textAdded: paste.string,
          didDelete: this.selectionIsExpanded()
        });
        (_this$responder18 = this.responder) === null || _this$responder18 === void 0 || _this$responder18.insertString(paste.string);
        this.requestRender();
        (_this$delegate15 = this.delegate) === null || _this$delegate15 === void 0 || _this$delegate15.inputControllerDidPaste(paste);
      } else if (html) {
        var _this$delegate16, _this$responder19, _this$delegate17;
        paste.type = "text/html";
        paste.html = html;
        (_this$delegate16 = this.delegate) === null || _this$delegate16 === void 0 || _this$delegate16.inputControllerWillPaste(paste);
        (_this$responder19 = this.responder) === null || _this$responder19 === void 0 || _this$responder19.insertHTML(paste.html);
        this.requestRender();
        (_this$delegate17 = this.delegate) === null || _this$delegate17 === void 0 || _this$delegate17.inputControllerDidPaste(paste);
      } else if (Array.from(clipboard.types).includes("Files")) {
        var _clipboard$items, _clipboard$items$getA;
        const file = (_clipboard$items = clipboard.items) === null || _clipboard$items === void 0 || (_clipboard$items = _clipboard$items[0]) === null || _clipboard$items === void 0 || (_clipboard$items$getA = _clipboard$items.getAsFile) === null || _clipboard$items$getA === void 0 ? void 0 : _clipboard$items$getA.call(_clipboard$items);
        if (file) {
          var _this$delegate18, _this$responder20, _this$delegate19;
          const extension = extensionForFile(file);
          if (!file.name && extension) {
            file.name = "pasted-file-".concat(++pastedFileCount, ".").concat(extension);
          }
          paste.type = "File";
          paste.file = file;
          (_this$delegate18 = this.delegate) === null || _this$delegate18 === void 0 || _this$delegate18.inputControllerWillAttachFiles();
          (_this$responder20 = this.responder) === null || _this$responder20 === void 0 || _this$responder20.insertFile(paste.file);
          this.requestRender();
          (_this$delegate19 = this.delegate) === null || _this$delegate19 === void 0 || _this$delegate19.inputControllerDidPaste(paste);
        }
      }
      event.preventDefault();
    },
    compositionstart(event) {
      return this.getCompositionInput().start(event.data);
    },
    compositionupdate(event) {
      return this.getCompositionInput().update(event.data);
    },
    compositionend(event) {
      return this.getCompositionInput().end(event.data);
    },
    beforeinput(event) {
      this.inputSummary.didInput = true;
    },
    input(event) {
      this.inputSummary.didInput = true;
      return event.stopPropagation();
    }
  });
  _defineProperty(Level0InputController, "keys", {
    backspace(event) {
      var _this$delegate20;
      (_this$delegate20 = this.delegate) === null || _this$delegate20 === void 0 || _this$delegate20.inputControllerWillPerformTyping();
      return this.deleteInDirection("backward", event);
    },
    delete(event) {
      var _this$delegate21;
      (_this$delegate21 = this.delegate) === null || _this$delegate21 === void 0 || _this$delegate21.inputControllerWillPerformTyping();
      return this.deleteInDirection("forward", event);
    },
    return(event) {
      var _this$delegate22, _this$responder21;
      this.setInputSummary({
        preferDocument: true
      });
      (_this$delegate22 = this.delegate) === null || _this$delegate22 === void 0 || _this$delegate22.inputControllerWillPerformTyping();
      return (_this$responder21 = this.responder) === null || _this$responder21 === void 0 ? void 0 : _this$responder21.insertLineBreak();
    },
    tab(event) {
      var _this$responder22;
      if ((_this$responder22 = this.responder) !== null && _this$responder22 !== void 0 && _this$responder22.canIncreaseNestingLevel()) {
        var _this$responder23;
        (_this$responder23 = this.responder) === null || _this$responder23 === void 0 || _this$responder23.increaseNestingLevel();
        this.requestRender();
        event.preventDefault();
      }
    },
    left(event) {
      if (this.selectionIsInCursorTarget()) {
        var _this$responder24;
        event.preventDefault();
        return (_this$responder24 = this.responder) === null || _this$responder24 === void 0 ? void 0 : _this$responder24.moveCursorInDirection("backward");
      }
    },
    right(event) {
      if (this.selectionIsInCursorTarget()) {
        var _this$responder25;
        event.preventDefault();
        return (_this$responder25 = this.responder) === null || _this$responder25 === void 0 ? void 0 : _this$responder25.moveCursorInDirection("forward");
      }
    },
    control: {
      d(event) {
        var _this$delegate23;
        (_this$delegate23 = this.delegate) === null || _this$delegate23 === void 0 || _this$delegate23.inputControllerWillPerformTyping();
        return this.deleteInDirection("forward", event);
      },
      h(event) {
        var _this$delegate24;
        (_this$delegate24 = this.delegate) === null || _this$delegate24 === void 0 || _this$delegate24.inputControllerWillPerformTyping();
        return this.deleteInDirection("backward", event);
      },
      o(event) {
        var _this$delegate25, _this$responder26;
        event.preventDefault();
        (_this$delegate25 = this.delegate) === null || _this$delegate25 === void 0 || _this$delegate25.inputControllerWillPerformTyping();
        (_this$responder26 = this.responder) === null || _this$responder26 === void 0 || _this$responder26.insertString("\n", {
          updatePosition: false
        });
        return this.requestRender();
      }
    },
    shift: {
      return(event) {
        var _this$delegate26, _this$responder27;
        (_this$delegate26 = this.delegate) === null || _this$delegate26 === void 0 || _this$delegate26.inputControllerWillPerformTyping();
        (_this$responder27 = this.responder) === null || _this$responder27 === void 0 || _this$responder27.insertString("\n");
        this.requestRender();
        event.preventDefault();
      },
      tab(event) {
        var _this$responder28;
        if ((_this$responder28 = this.responder) !== null && _this$responder28 !== void 0 && _this$responder28.canDecreaseNestingLevel()) {
          var _this$responder29;
          (_this$responder29 = this.responder) === null || _this$responder29 === void 0 || _this$responder29.decreaseNestingLevel();
          this.requestRender();
          event.preventDefault();
        }
      },
      left(event) {
        if (this.selectionIsInCursorTarget()) {
          event.preventDefault();
          return this.expandSelectionInDirection("backward");
        }
      },
      right(event) {
        if (this.selectionIsInCursorTarget()) {
          event.preventDefault();
          return this.expandSelectionInDirection("forward");
        }
      }
    },
    alt: {
      backspace(event) {
        var _this$delegate27;
        this.setInputSummary({
          preferDocument: false
        });
        return (_this$delegate27 = this.delegate) === null || _this$delegate27 === void 0 ? void 0 : _this$delegate27.inputControllerWillPerformTyping();
      }
    },
    meta: {
      backspace(event) {
        var _this$delegate28;
        this.setInputSummary({
          preferDocument: false
        });
        return (_this$delegate28 = this.delegate) === null || _this$delegate28 === void 0 ? void 0 : _this$delegate28.inputControllerWillPerformTyping();
      }
    }
  });
  Level0InputController.proxyMethod("responder?.getSelectedRange");
  Level0InputController.proxyMethod("responder?.setSelectedRange");
  Level0InputController.proxyMethod("responder?.expandSelectionInDirection");
  Level0InputController.proxyMethod("responder?.selectionIsInCursorTarget");
  Level0InputController.proxyMethod("responder?.selectionIsExpanded");
  const extensionForFile = file => {
    var _file$type;
    return (_file$type = file.type) === null || _file$type === void 0 || (_file$type = _file$type.match(/\/(\w+)$/)) === null || _file$type === void 0 ? void 0 : _file$type[1];
  };
  const hasStringCodePointAt = !!((_$codePointAt = (_ = " ").codePointAt) !== null && _$codePointAt !== void 0 && _$codePointAt.call(_, 0));
  const stringFromKeyEvent = function (event) {
    if (event.key && hasStringCodePointAt && event.key.codePointAt(0) === event.keyCode) {
      return event.key;
    } else {
      let code;
      if (event.which === null) {
        code = event.keyCode;
      } else if (event.which !== 0 && event.charCode !== 0) {
        code = event.charCode;
      }
      if (code != null && keyNames[code] !== "escape") {
        return UTF16String.fromCodepoints([code]).toString();
      }
    }
  };
  const pasteEventIsCrippledSafariHTMLPaste = function (event) {
    const paste = event.clipboardData;
    if (paste) {
      if (paste.types.includes("text/html")) {
        // Answer is yes if there's any possibility of Paste and Match Style in Safari,
        // which is nearly impossible to detect confidently: https://bugs.webkit.org/show_bug.cgi?id=174165
        for (const type of paste.types) {
          const hasPasteboardFlavor = /^CorePasteboardFlavorType/.test(type);
          const hasReadableDynamicData = /^dyn\./.test(type) && paste.getData(type);
          const mightBePasteAndMatchStyle = hasPasteboardFlavor || hasReadableDynamicData;
          if (mightBePasteAndMatchStyle) {
            return true;
          }
        }
        return false;
      } else {
        const isExternalHTMLPaste = paste.types.includes("com.apple.webarchive");
        const isExternalRichTextPaste = paste.types.includes("com.apple.flat-rtfd");
        return isExternalHTMLPaste || isExternalRichTextPaste;
      }
    }
  };
  class CompositionInput extends BasicObject {
    constructor(inputController) {
      super(...arguments);
      this.inputController = inputController;
      this.responder = this.inputController.responder;
      this.delegate = this.inputController.delegate;
      this.inputSummary = this.inputController.inputSummary;
      this.data = {};
    }
    start(data) {
      this.data.start = data;
      if (this.isSignificant()) {
        var _this$responder5;
        if (this.inputSummary.eventName === "keypress" && this.inputSummary.textAdded) {
          var _this$responder4;
          (_this$responder4 = this.responder) === null || _this$responder4 === void 0 || _this$responder4.deleteInDirection("left");
        }
        if (!this.selectionIsExpanded()) {
          this.insertPlaceholder();
          this.requestRender();
        }
        this.range = (_this$responder5 = this.responder) === null || _this$responder5 === void 0 ? void 0 : _this$responder5.getSelectedRange();
      }
    }
    update(data) {
      this.data.update = data;
      if (this.isSignificant()) {
        const range = this.selectPlaceholder();
        if (range) {
          this.forgetPlaceholder();
          this.range = range;
        }
      }
    }
    end(data) {
      this.data.end = data;
      if (this.isSignificant()) {
        this.forgetPlaceholder();
        if (this.canApplyToDocument()) {
          var _this$delegate2, _this$responder6, _this$responder7, _this$responder8;
          this.setInputSummary({
            preferDocument: true,
            didInput: false
          });
          (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || _this$delegate2.inputControllerWillPerformTyping();
          (_this$responder6 = this.responder) === null || _this$responder6 === void 0 || _this$responder6.setSelectedRange(this.range);
          (_this$responder7 = this.responder) === null || _this$responder7 === void 0 || _this$responder7.insertString(this.data.end);
          return (_this$responder8 = this.responder) === null || _this$responder8 === void 0 ? void 0 : _this$responder8.setSelectedRange(this.range[0] + this.data.end.length);
        } else if (this.data.start != null || this.data.update != null) {
          this.requestReparse();
          return this.inputController.reset();
        }
      } else {
        return this.inputController.reset();
      }
    }
    getEndData() {
      return this.data.end;
    }
    isEnded() {
      return this.getEndData() != null;
    }
    isSignificant() {
      if (browser.composesExistingText) {
        return this.inputSummary.didInput;
      } else {
        return true;
      }
    }

    // Private

    canApplyToDocument() {
      var _this$data$start, _this$data$end;
      return ((_this$data$start = this.data.start) === null || _this$data$start === void 0 ? void 0 : _this$data$start.length) === 0 && ((_this$data$end = this.data.end) === null || _this$data$end === void 0 ? void 0 : _this$data$end.length) > 0 && this.range;
    }
  }
  CompositionInput.proxyMethod("inputController.setInputSummary");
  CompositionInput.proxyMethod("inputController.requestRender");
  CompositionInput.proxyMethod("inputController.requestReparse");
  CompositionInput.proxyMethod("responder?.selectionIsExpanded");
  CompositionInput.proxyMethod("responder?.insertPlaceholder");
  CompositionInput.proxyMethod("responder?.selectPlaceholder");
  CompositionInput.proxyMethod("responder?.forgetPlaceholder");

  class Level2InputController extends InputController {
    constructor() {
      super(...arguments);
      this.render = this.render.bind(this);
    }
    elementDidMutate() {
      if (this.scheduledRender) {
        if (this.composing) {
          var _this$delegate, _this$delegate$inputC;
          return (_this$delegate = this.delegate) === null || _this$delegate === void 0 || (_this$delegate$inputC = _this$delegate.inputControllerDidAllowUnhandledInput) === null || _this$delegate$inputC === void 0 ? void 0 : _this$delegate$inputC.call(_this$delegate);
        }
      } else {
        return this.reparse();
      }
    }
    scheduleRender() {
      return this.scheduledRender ? this.scheduledRender : this.scheduledRender = requestAnimationFrame(this.render);
    }
    render() {
      var _this$afterRender;
      cancelAnimationFrame(this.scheduledRender);
      this.scheduledRender = null;
      if (!this.composing) {
        var _this$delegate2;
        (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 || _this$delegate2.render();
      }
      (_this$afterRender = this.afterRender) === null || _this$afterRender === void 0 || _this$afterRender.call(this);
      this.afterRender = null;
    }
    reparse() {
      var _this$delegate3;
      return (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 ? void 0 : _this$delegate3.reparse();
    }

    // Responder helpers

    insertString() {
      var _this$delegate4;
      let string = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "";
      let options = arguments.length > 1 ? arguments[1] : undefined;
      (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 || _this$delegate4.inputControllerWillPerformTyping();
      return this.withTargetDOMRange(function () {
        var _this$responder;
        return (_this$responder = this.responder) === null || _this$responder === void 0 ? void 0 : _this$responder.insertString(string, options);
      });
    }
    toggleAttributeIfSupported(attributeName) {
      if (getAllAttributeNames().includes(attributeName)) {
        var _this$delegate5;
        (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || _this$delegate5.inputControllerWillPerformFormatting(attributeName);
        return this.withTargetDOMRange(function () {
          var _this$responder2;
          return (_this$responder2 = this.responder) === null || _this$responder2 === void 0 ? void 0 : _this$responder2.toggleCurrentAttribute(attributeName);
        });
      }
    }
    activateAttributeIfSupported(attributeName, value) {
      if (getAllAttributeNames().includes(attributeName)) {
        var _this$delegate6;
        (_this$delegate6 = this.delegate) === null || _this$delegate6 === void 0 || _this$delegate6.inputControllerWillPerformFormatting(attributeName);
        return this.withTargetDOMRange(function () {
          var _this$responder3;
          return (_this$responder3 = this.responder) === null || _this$responder3 === void 0 ? void 0 : _this$responder3.setCurrentAttribute(attributeName, value);
        });
      }
    }
    deleteInDirection(direction) {
      let {
        recordUndoEntry
      } = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
        recordUndoEntry: true
      };
      if (recordUndoEntry) {
        var _this$delegate7;
        (_this$delegate7 = this.delegate) === null || _this$delegate7 === void 0 || _this$delegate7.inputControllerWillPerformTyping();
      }
      const perform = () => {
        var _this$responder4;
        return (_this$responder4 = this.responder) === null || _this$responder4 === void 0 ? void 0 : _this$responder4.deleteInDirection(direction);
      };
      const domRange = this.getTargetDOMRange({
        minLength: this.composing ? 1 : 2
      });
      if (domRange) {
        return this.withTargetDOMRange(domRange, perform);
      } else {
        return perform();
      }
    }

    // Selection helpers

    withTargetDOMRange(domRange, fn) {
      if (typeof domRange === "function") {
        fn = domRange;
        domRange = this.getTargetDOMRange();
      }
      if (domRange) {
        var _this$responder5;
        return (_this$responder5 = this.responder) === null || _this$responder5 === void 0 ? void 0 : _this$responder5.withTargetDOMRange(domRange, fn.bind(this));
      } else {
        selectionChangeObserver.reset();
        return fn.call(this);
      }
    }
    getTargetDOMRange() {
      var _this$event$getTarget, _this$event;
      let {
        minLength
      } = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {
        minLength: 0
      };
      const targetRanges = (_this$event$getTarget = (_this$event = this.event).getTargetRanges) === null || _this$event$getTarget === void 0 ? void 0 : _this$event$getTarget.call(_this$event);
      if (targetRanges) {
        if (targetRanges.length) {
          const domRange = staticRangeToRange(targetRanges[0]);
          if (minLength === 0 || domRange.toString().length >= minLength) {
            return domRange;
          }
        }
      }
    }
    withEvent(event, fn) {
      let result;
      this.event = event;
      try {
        result = fn.call(this);
      } finally {
        this.event = null;
      }
      return result;
    }
  }
  _defineProperty(Level2InputController, "events", {
    keydown(event) {
      if (keyEventIsKeyboardCommand(event)) {
        var _this$delegate8;
        const command = keyboardCommandFromKeyEvent(event);
        if ((_this$delegate8 = this.delegate) !== null && _this$delegate8 !== void 0 && _this$delegate8.inputControllerDidReceiveKeyboardCommand(command)) {
          event.preventDefault();
        }
      } else {
        let name = event.key;
        if (event.altKey) {
          name += "+Alt";
        }
        if (event.shiftKey) {
          name += "+Shift";
        }
        const handler = this.constructor.keys[name];
        if (handler) {
          return this.withEvent(event, handler);
        }
      }
    },
    // Handle paste event to work around beforeinput.insertFromPaste browser bugs.
    // Safe to remove each condition once fixed upstream.
    paste(event) {
      var _event$clipboardData;
      // https://bugs.webkit.org/show_bug.cgi?id=194921
      let paste;
      const href = (_event$clipboardData = event.clipboardData) === null || _event$clipboardData === void 0 ? void 0 : _event$clipboardData.getData("URL");
      if (pasteEventHasFilesOnly(event)) {
        event.preventDefault();
        return this.attachFiles(event.clipboardData.files);

        // https://bugs.chromium.org/p/chromium/issues/detail?id=934448
      } else if (pasteEventHasPlainTextOnly(event)) {
        var _this$delegate9, _this$responder6, _this$delegate10;
        event.preventDefault();
        paste = {
          type: "text/plain",
          string: event.clipboardData.getData("text/plain")
        };
        (_this$delegate9 = this.delegate) === null || _this$delegate9 === void 0 || _this$delegate9.inputControllerWillPaste(paste);
        (_this$responder6 = this.responder) === null || _this$responder6 === void 0 || _this$responder6.insertString(paste.string);
        this.render();
        return (_this$delegate10 = this.delegate) === null || _this$delegate10 === void 0 ? void 0 : _this$delegate10.inputControllerDidPaste(paste);

        // https://bugs.webkit.org/show_bug.cgi?id=196702
      } else if (href) {
        var _this$delegate11, _this$responder7, _this$delegate12;
        event.preventDefault();
        paste = {
          type: "text/html",
          html: this.createLinkHTML(href)
        };
        (_this$delegate11 = this.delegate) === null || _this$delegate11 === void 0 || _this$delegate11.inputControllerWillPaste(paste);
        (_this$responder7 = this.responder) === null || _this$responder7 === void 0 || _this$responder7.insertHTML(paste.html);
        this.render();
        return (_this$delegate12 = this.delegate) === null || _this$delegate12 === void 0 ? void 0 : _this$delegate12.inputControllerDidPaste(paste);
      }
    },
    beforeinput(event) {
      const handler = this.constructor.inputTypes[event.inputType];
      const immmediateRender = shouldRenderInmmediatelyToDealWithIOSDictation(event);
      if (handler) {
        this.withEvent(event, handler);
        if (!immmediateRender) {
          this.scheduleRender();
        }
      }
      if (immmediateRender) {
        this.render();
      }
    },
    input(event) {
      selectionChangeObserver.reset();
    },
    dragstart(event) {
      var _this$responder8;
      if ((_this$responder8 = this.responder) !== null && _this$responder8 !== void 0 && _this$responder8.selectionContainsAttachments()) {
        var _this$responder9;
        event.dataTransfer.setData("application/x-trix-dragging", true);
        this.dragging = {
          range: (_this$responder9 = this.responder) === null || _this$responder9 === void 0 ? void 0 : _this$responder9.getSelectedRange(),
          point: pointFromEvent(event)
        };
      }
    },
    dragenter(event) {
      if (dragEventHasFiles(event)) {
        event.preventDefault();
      }
    },
    dragover(event) {
      if (this.dragging) {
        event.preventDefault();
        const point = pointFromEvent(event);
        if (!objectsAreEqual(point, this.dragging.point)) {
          var _this$responder10;
          this.dragging.point = point;
          return (_this$responder10 = this.responder) === null || _this$responder10 === void 0 ? void 0 : _this$responder10.setLocationRangeFromPointRange(point);
        }
      } else if (dragEventHasFiles(event)) {
        event.preventDefault();
      }
    },
    drop(event) {
      if (this.dragging) {
        var _this$delegate13, _this$responder11;
        event.preventDefault();
        (_this$delegate13 = this.delegate) === null || _this$delegate13 === void 0 || _this$delegate13.inputControllerWillMoveText();
        (_this$responder11 = this.responder) === null || _this$responder11 === void 0 || _this$responder11.moveTextFromRange(this.dragging.range);
        this.dragging = null;
        return this.scheduleRender();
      } else if (dragEventHasFiles(event)) {
        var _this$responder12;
        event.preventDefault();
        const point = pointFromEvent(event);
        (_this$responder12 = this.responder) === null || _this$responder12 === void 0 || _this$responder12.setLocationRangeFromPointRange(point);
        return this.attachFiles(event.dataTransfer.files);
      }
    },
    dragend() {
      if (this.dragging) {
        var _this$responder13;
        (_this$responder13 = this.responder) === null || _this$responder13 === void 0 || _this$responder13.setSelectedRange(this.dragging.range);
        this.dragging = null;
      }
    },
    compositionend(event) {
      if (this.composing) {
        this.composing = false;
        if (!browser$1.recentAndroid) this.scheduleRender();
      }
    }
  });
  _defineProperty(Level2InputController, "keys", {
    ArrowLeft() {
      var _this$responder14;
      if ((_this$responder14 = this.responder) !== null && _this$responder14 !== void 0 && _this$responder14.shouldManageMovingCursorInDirection("backward")) {
        var _this$responder15;
        this.event.preventDefault();
        return (_this$responder15 = this.responder) === null || _this$responder15 === void 0 ? void 0 : _this$responder15.moveCursorInDirection("backward");
      }
    },
    ArrowRight() {
      var _this$responder16;
      if ((_this$responder16 = this.responder) !== null && _this$responder16 !== void 0 && _this$responder16.shouldManageMovingCursorInDirection("forward")) {
        var _this$responder17;
        this.event.preventDefault();
        return (_this$responder17 = this.responder) === null || _this$responder17 === void 0 ? void 0 : _this$responder17.moveCursorInDirection("forward");
      }
    },
    Backspace() {
      var _this$responder18;
      if ((_this$responder18 = this.responder) !== null && _this$responder18 !== void 0 && _this$responder18.shouldManageDeletingInDirection("backward")) {
        var _this$delegate14, _this$responder19;
        this.event.preventDefault();
        (_this$delegate14 = this.delegate) === null || _this$delegate14 === void 0 || _this$delegate14.inputControllerWillPerformTyping();
        (_this$responder19 = this.responder) === null || _this$responder19 === void 0 || _this$responder19.deleteInDirection("backward");
        return this.render();
      }
    },
    Tab() {
      var _this$responder20;
      if ((_this$responder20 = this.responder) !== null && _this$responder20 !== void 0 && _this$responder20.canIncreaseNestingLevel()) {
        var _this$responder21;
        this.event.preventDefault();
        (_this$responder21 = this.responder) === null || _this$responder21 === void 0 || _this$responder21.increaseNestingLevel();
        return this.render();
      }
    },
    "Tab+Shift"() {
      var _this$responder22;
      if ((_this$responder22 = this.responder) !== null && _this$responder22 !== void 0 && _this$responder22.canDecreaseNestingLevel()) {
        var _this$responder23;
        this.event.preventDefault();
        (_this$responder23 = this.responder) === null || _this$responder23 === void 0 || _this$responder23.decreaseNestingLevel();
        return this.render();
      }
    }
  });
  _defineProperty(Level2InputController, "inputTypes", {
    deleteByComposition() {
      return this.deleteInDirection("backward", {
        recordUndoEntry: false
      });
    },
    deleteByCut() {
      return this.deleteInDirection("backward");
    },
    deleteByDrag() {
      this.event.preventDefault();
      return this.withTargetDOMRange(function () {
        var _this$responder24;
        this.deleteByDragRange = (_this$responder24 = this.responder) === null || _this$responder24 === void 0 ? void 0 : _this$responder24.getSelectedRange();
      });
    },
    deleteCompositionText() {
      return this.deleteInDirection("backward", {
        recordUndoEntry: false
      });
    },
    deleteContent() {
      return this.deleteInDirection("backward");
    },
    deleteContentBackward() {
      return this.deleteInDirection("backward");
    },
    deleteContentForward() {
      return this.deleteInDirection("forward");
    },
    deleteEntireSoftLine() {
      return this.deleteInDirection("forward");
    },
    deleteHardLineBackward() {
      return this.deleteInDirection("backward");
    },
    deleteHardLineForward() {
      return this.deleteInDirection("forward");
    },
    deleteSoftLineBackward() {
      return this.deleteInDirection("backward");
    },
    deleteSoftLineForward() {
      return this.deleteInDirection("forward");
    },
    deleteWordBackward() {
      return this.deleteInDirection("backward");
    },
    deleteWordForward() {
      return this.deleteInDirection("forward");
    },
    formatBackColor() {
      return this.activateAttributeIfSupported("backgroundColor", this.event.data);
    },
    formatBold() {
      return this.toggleAttributeIfSupported("bold");
    },
    formatFontColor() {
      return this.activateAttributeIfSupported("color", this.event.data);
    },
    formatFontName() {
      return this.activateAttributeIfSupported("font", this.event.data);
    },
    formatIndent() {
      var _this$responder25;
      if ((_this$responder25 = this.responder) !== null && _this$responder25 !== void 0 && _this$responder25.canIncreaseNestingLevel()) {
        return this.withTargetDOMRange(function () {
          var _this$responder26;
          return (_this$responder26 = this.responder) === null || _this$responder26 === void 0 ? void 0 : _this$responder26.increaseNestingLevel();
        });
      }
    },
    formatItalic() {
      return this.toggleAttributeIfSupported("italic");
    },
    formatJustifyCenter() {
      return this.toggleAttributeIfSupported("justifyCenter");
    },
    formatJustifyFull() {
      return this.toggleAttributeIfSupported("justifyFull");
    },
    formatJustifyLeft() {
      return this.toggleAttributeIfSupported("justifyLeft");
    },
    formatJustifyRight() {
      return this.toggleAttributeIfSupported("justifyRight");
    },
    formatOutdent() {
      var _this$responder27;
      if ((_this$responder27 = this.responder) !== null && _this$responder27 !== void 0 && _this$responder27.canDecreaseNestingLevel()) {
        return this.withTargetDOMRange(function () {
          var _this$responder28;
          return (_this$responder28 = this.responder) === null || _this$responder28 === void 0 ? void 0 : _this$responder28.decreaseNestingLevel();
        });
      }
    },
    formatRemove() {
      this.withTargetDOMRange(function () {
        for (const attributeName in (_this$responder29 = this.responder) === null || _this$responder29 === void 0 ? void 0 : _this$responder29.getCurrentAttributes()) {
          var _this$responder29, _this$responder30;
          (_this$responder30 = this.responder) === null || _this$responder30 === void 0 || _this$responder30.removeCurrentAttribute(attributeName);
        }
      });
    },
    formatSetBlockTextDirection() {
      return this.activateAttributeIfSupported("blockDir", this.event.data);
    },
    formatSetInlineTextDirection() {
      return this.activateAttributeIfSupported("textDir", this.event.data);
    },
    formatStrikeThrough() {
      return this.toggleAttributeIfSupported("strike");
    },
    formatSubscript() {
      return this.toggleAttributeIfSupported("sub");
    },
    formatSuperscript() {
      return this.toggleAttributeIfSupported("sup");
    },
    formatUnderline() {
      return this.toggleAttributeIfSupported("underline");
    },
    historyRedo() {
      var _this$delegate15;
      return (_this$delegate15 = this.delegate) === null || _this$delegate15 === void 0 ? void 0 : _this$delegate15.inputControllerWillPerformRedo();
    },
    historyUndo() {
      var _this$delegate16;
      return (_this$delegate16 = this.delegate) === null || _this$delegate16 === void 0 ? void 0 : _this$delegate16.inputControllerWillPerformUndo();
    },
    insertCompositionText() {
      this.composing = true;
      return this.insertString(this.event.data);
    },
    insertFromComposition() {
      this.composing = false;
      return this.insertString(this.event.data);
    },
    insertFromDrop() {
      const range = this.deleteByDragRange;
      if (range) {
        var _this$delegate17;
        this.deleteByDragRange = null;
        (_this$delegate17 = this.delegate) === null || _this$delegate17 === void 0 || _this$delegate17.inputControllerWillMoveText();
        return this.withTargetDOMRange(function () {
          var _this$responder31;
          return (_this$responder31 = this.responder) === null || _this$responder31 === void 0 ? void 0 : _this$responder31.moveTextFromRange(range);
        });
      }
    },
    insertFromPaste() {
      const {
        dataTransfer
      } = this.event;
      const paste = {
        dataTransfer
      };
      const href = dataTransfer.getData("URL");
      const html = dataTransfer.getData("text/html");
      if (href) {
        var _this$delegate18;
        let string;
        this.event.preventDefault();
        paste.type = "text/html";
        const name = dataTransfer.getData("public.url-name");
        if (name) {
          string = squishBreakableWhitespace(name).trim();
        } else {
          string = href;
        }
        paste.html = this.createLinkHTML(href, string);
        (_this$delegate18 = this.delegate) === null || _this$delegate18 === void 0 || _this$delegate18.inputControllerWillPaste(paste);
        this.withTargetDOMRange(function () {
          var _this$responder32;
          return (_this$responder32 = this.responder) === null || _this$responder32 === void 0 ? void 0 : _this$responder32.insertHTML(paste.html);
        });
        this.afterRender = () => {
          var _this$delegate19;
          return (_this$delegate19 = this.delegate) === null || _this$delegate19 === void 0 ? void 0 : _this$delegate19.inputControllerDidPaste(paste);
        };
      } else if (dataTransferIsPlainText(dataTransfer)) {
        var _this$delegate20;
        paste.type = "text/plain";
        paste.string = dataTransfer.getData("text/plain");
        (_this$delegate20 = this.delegate) === null || _this$delegate20 === void 0 || _this$delegate20.inputControllerWillPaste(paste);
        this.withTargetDOMRange(function () {
          var _this$responder33;
          return (_this$responder33 = this.responder) === null || _this$responder33 === void 0 ? void 0 : _this$responder33.insertString(paste.string);
        });
        this.afterRender = () => {
          var _this$delegate21;
          return (_this$delegate21 = this.delegate) === null || _this$delegate21 === void 0 ? void 0 : _this$delegate21.inputControllerDidPaste(paste);
        };
      } else if (processableFilePaste(this.event)) {
        var _this$delegate22;
        paste.type = "File";
        paste.file = dataTransfer.files[0];
        (_this$delegate22 = this.delegate) === null || _this$delegate22 === void 0 || _this$delegate22.inputControllerWillPaste(paste);
        this.withTargetDOMRange(function () {
          var _this$responder34;
          return (_this$responder34 = this.responder) === null || _this$responder34 === void 0 ? void 0 : _this$responder34.insertFile(paste.file);
        });
        this.afterRender = () => {
          var _this$delegate23;
          return (_this$delegate23 = this.delegate) === null || _this$delegate23 === void 0 ? void 0 : _this$delegate23.inputControllerDidPaste(paste);
        };
      } else if (html) {
        var _this$delegate24;
        this.event.preventDefault();
        paste.type = "text/html";
        paste.html = html;
        (_this$delegate24 = this.delegate) === null || _this$delegate24 === void 0 || _this$delegate24.inputControllerWillPaste(paste);
        this.withTargetDOMRange(function () {
          var _this$responder35;
          return (_this$responder35 = this.responder) === null || _this$responder35 === void 0 ? void 0 : _this$responder35.insertHTML(paste.html);
        });
        this.afterRender = () => {
          var _this$delegate25;
          return (_this$delegate25 = this.delegate) === null || _this$delegate25 === void 0 ? void 0 : _this$delegate25.inputControllerDidPaste(paste);
        };
      }
    },
    insertFromYank() {
      return this.insertString(this.event.data);
    },
    insertLineBreak() {
      return this.insertString("\n");
    },
    insertLink() {
      return this.activateAttributeIfSupported("href", this.event.data);
    },
    insertOrderedList() {
      return this.toggleAttributeIfSupported("number");
    },
    insertParagraph() {
      var _this$delegate26;
      (_this$delegate26 = this.delegate) === null || _this$delegate26 === void 0 || _this$delegate26.inputControllerWillPerformTyping();
      return this.withTargetDOMRange(function () {
        var _this$responder36;
        return (_this$responder36 = this.responder) === null || _this$responder36 === void 0 ? void 0 : _this$responder36.insertLineBreak();
      });
    },
    insertReplacementText() {
      const replacement = this.event.dataTransfer.getData("text/plain");
      const domRange = this.event.getTargetRanges()[0];
      this.withTargetDOMRange(domRange, () => {
        this.insertString(replacement, {
          updatePosition: false
        });
      });
    },
    insertText() {
      var _this$event$dataTrans;
      return this.insertString(this.event.data || ((_this$event$dataTrans = this.event.dataTransfer) === null || _this$event$dataTrans === void 0 ? void 0 : _this$event$dataTrans.getData("text/plain")));
    },
    insertTranspose() {
      return this.insertString(this.event.data);
    },
    insertUnorderedList() {
      return this.toggleAttributeIfSupported("bullet");
    }
  });
  const staticRangeToRange = function (staticRange) {
    const range = document.createRange();
    range.setStart(staticRange.startContainer, staticRange.startOffset);
    range.setEnd(staticRange.endContainer, staticRange.endOffset);
    return range;
  };

  // Event helpers

  const dragEventHasFiles = event => {
    var _event$dataTransfer;
    return Array.from(((_event$dataTransfer = event.dataTransfer) === null || _event$dataTransfer === void 0 ? void 0 : _event$dataTransfer.types) || []).includes("Files");
  };
  const processableFilePaste = event => {
    var _event$dataTransfer$f;
    // Paste events that only have files are handled by the paste event handler,
    // to work around Safari not supporting beforeinput.insertFromPaste for files.

    // MS Office text pastes include a file with a screenshot of the text, but we should
    // handle them as text pastes.
    return ((_event$dataTransfer$f = event.dataTransfer.files) === null || _event$dataTransfer$f === void 0 ? void 0 : _event$dataTransfer$f[0]) && !pasteEventHasFilesOnly(event) && !dataTransferIsMsOfficePaste(event);
  };
  const pasteEventHasFilesOnly = function (event) {
    const clipboard = event.clipboardData;
    if (clipboard) {
      const fileTypes = Array.from(clipboard.types).filter(type => type.match(/file/i)); // "Files", "application/x-moz-file"
      return fileTypes.length === clipboard.types.length && clipboard.files.length >= 1;
    }
  };
  const pasteEventHasPlainTextOnly = function (event) {
    const clipboard = event.clipboardData;
    if (clipboard) {
      return clipboard.types.includes("text/plain") && clipboard.types.length === 1;
    }
  };
  const keyboardCommandFromKeyEvent = function (event) {
    const command = [];
    if (event.altKey) {
      command.push("alt");
    }
    if (event.shiftKey) {
      command.push("shift");
    }
    command.push(event.key);
    return command;
  };
  const pointFromEvent = event => ({
    x: event.clientX,
    y: event.clientY
  });

  const attributeButtonSelector = "[data-trix-attribute]";
  const actionButtonSelector = "[data-trix-action]";
  const toolbarButtonSelector = "".concat(attributeButtonSelector, ", ").concat(actionButtonSelector);
  const dialogSelector = "[data-trix-dialog]";
  const activeDialogSelector = "".concat(dialogSelector, "[data-trix-active]");
  const dialogButtonSelector = "".concat(dialogSelector, " [data-trix-method]");
  const dialogInputSelector = "".concat(dialogSelector, " [data-trix-input]");
  const getInputForDialog = (element, attributeName) => {
    if (!attributeName) {
      attributeName = getAttributeName(element);
    }
    return element.querySelector("[data-trix-input][name='".concat(attributeName, "']"));
  };
  const getActionName = element => element.getAttribute("data-trix-action");
  const getAttributeName = element => {
    return element.getAttribute("data-trix-attribute") || element.getAttribute("data-trix-dialog-attribute");
  };
  const getDialogName = element => element.getAttribute("data-trix-dialog");
  class ToolbarController extends BasicObject {
    constructor(element) {
      super(element);
      this.didClickActionButton = this.didClickActionButton.bind(this);
      this.didClickAttributeButton = this.didClickAttributeButton.bind(this);
      this.didClickDialogButton = this.didClickDialogButton.bind(this);
      this.didKeyDownDialogInput = this.didKeyDownDialogInput.bind(this);
      this.element = element;
      this.attributes = {};
      this.actions = {};
      this.resetDialogInputs();
      handleEvent("mousedown", {
        onElement: this.element,
        matchingSelector: actionButtonSelector,
        withCallback: this.didClickActionButton
      });
      handleEvent("mousedown", {
        onElement: this.element,
        matchingSelector: attributeButtonSelector,
        withCallback: this.didClickAttributeButton
      });
      handleEvent("click", {
        onElement: this.element,
        matchingSelector: toolbarButtonSelector,
        preventDefault: true
      });
      handleEvent("click", {
        onElement: this.element,
        matchingSelector: dialogButtonSelector,
        withCallback: this.didClickDialogButton
      });
      handleEvent("keydown", {
        onElement: this.element,
        matchingSelector: dialogInputSelector,
        withCallback: this.didKeyDownDialogInput
      });
    }

    // Event handlers

    didClickActionButton(event, element) {
      var _this$delegate;
      (_this$delegate = this.delegate) === null || _this$delegate === void 0 || _this$delegate.toolbarDidClickButton();
      event.preventDefault();
      const actionName = getActionName(element);
      if (this.getDialog(actionName)) {
        return this.toggleDialog(actionName);
      } else {
        var _this$delegate2;
        return (_this$delegate2 = this.delegate) === null || _this$delegate2 === void 0 ? void 0 : _this$delegate2.toolbarDidInvokeAction(actionName, element);
      }
    }
    didClickAttributeButton(event, element) {
      var _this$delegate3;
      (_this$delegate3 = this.delegate) === null || _this$delegate3 === void 0 || _this$delegate3.toolbarDidClickButton();
      event.preventDefault();
      const attributeName = getAttributeName(element);
      if (this.getDialog(attributeName)) {
        this.toggleDialog(attributeName);
      } else {
        var _this$delegate4;
        (_this$delegate4 = this.delegate) === null || _this$delegate4 === void 0 || _this$delegate4.toolbarDidToggleAttribute(attributeName);
      }
      return this.refreshAttributeButtons();
    }
    didClickDialogButton(event, element) {
      const dialogElement = findClosestElementFromNode(element, {
        matchingSelector: dialogSelector
      });
      const method = element.getAttribute("data-trix-method");
      return this[method].call(this, dialogElement);
    }
    didKeyDownDialogInput(event, element) {
      if (event.keyCode === 13) {
        // Enter key
        event.preventDefault();
        const attribute = element.getAttribute("name");
        const dialog = this.getDialog(attribute);
        this.setAttribute(dialog);
      }
      if (event.keyCode === 27) {
        // Escape key
        event.preventDefault();
        return this.hideDialog();
      }
    }

    // Action buttons

    updateActions(actions) {
      this.actions = actions;
      return this.refreshActionButtons();
    }
    refreshActionButtons() {
      return this.eachActionButton((element, actionName) => {
        element.disabled = this.actions[actionName] === false;
      });
    }
    eachActionButton(callback) {
      return Array.from(this.element.querySelectorAll(actionButtonSelector)).map(element => callback(element, getActionName(element)));
    }

    // Attribute buttons

    updateAttributes(attributes) {
      this.attributes = attributes;
      return this.refreshAttributeButtons();
    }
    refreshAttributeButtons() {
      return this.eachAttributeButton((element, attributeName) => {
        element.disabled = this.attributes[attributeName] === false;
        if (this.attributes[attributeName] || this.dialogIsVisible(attributeName)) {
          element.setAttribute("data-trix-active", "");
          return element.classList.add("trix-active");
        } else {
          element.removeAttribute("data-trix-active");
          return element.classList.remove("trix-active");
        }
      });
    }
    eachAttributeButton(callback) {
      return Array.from(this.element.querySelectorAll(attributeButtonSelector)).map(element => callback(element, getAttributeName(element)));
    }
    applyKeyboardCommand(keys) {
      const keyString = JSON.stringify(keys.sort());
      for (const button of Array.from(this.element.querySelectorAll("[data-trix-key]"))) {
        const buttonKeys = button.getAttribute("data-trix-key").split("+");
        const buttonKeyString = JSON.stringify(buttonKeys.sort());
        if (buttonKeyString === keyString) {
          triggerEvent("mousedown", {
            onElement: button
          });
          return true;
        }
      }
      return false;
    }

    // Dialogs

    dialogIsVisible(dialogName) {
      const element = this.getDialog(dialogName);
      if (element) {
        return element.hasAttribute("data-trix-active");
      }
    }
    toggleDialog(dialogName) {
      if (this.dialogIsVisible(dialogName)) {
        return this.hideDialog();
      } else {
        return this.showDialog(dialogName);
      }
    }
    showDialog(dialogName) {
      var _this$delegate5, _this$delegate6;
      this.hideDialog();
      (_this$delegate5 = this.delegate) === null || _this$delegate5 === void 0 || _this$delegate5.toolbarWillShowDialog();
      const element = this.getDialog(dialogName);
      element.setAttribute("data-trix-active", "");
      element.classList.add("trix-active");
      Array.from(element.querySelectorAll("input[disabled]")).forEach(disabledInput => {
        disabledInput.removeAttribute("disabled");
      });
      const attributeName = getAttributeName(element);
      if (attributeName) {
        const input = getInputForDialog(element, dialogName);
        if (input) {
          input.value = this.attributes[attributeName] || "";
          input.select();
        }
      }
      return (_this$delegate6 = this.delegate) === null || _this$delegate6 === void 0 ? void 0 : _this$delegate6.toolbarDidShowDialog(dialogName);
    }
    setAttribute(dialogElement) {
      var _this$delegate7;
      const attributeName = getAttributeName(dialogElement);
      const input = getInputForDialog(dialogElement, attributeName);
      if (input.willValidate) {
        input.setCustomValidity("");
        if (!input.checkValidity() || !this.isSafeAttribute(input)) {
          input.setCustomValidity("Invalid value");
          input.setAttribute("data-trix-validate", "");
          input.classList.add("trix-validate");
          return input.focus();
        }
      }
      (_this$delegate7 = this.delegate) === null || _this$delegate7 === void 0 || _this$delegate7.toolbarDidUpdateAttribute(attributeName, input.value);
      return this.hideDialog();
    }
    isSafeAttribute(input) {
      if (input.hasAttribute("data-trix-validate-href")) {
        return purify.isValidAttribute("a", "href", input.value);
      } else {
        return true;
      }
    }
    removeAttribute(dialogElement) {
      var _this$delegate8;
      const attributeName = getAttributeName(dialogElement);
      (_this$delegate8 = this.delegate) === null || _this$delegate8 === void 0 || _this$delegate8.toolbarDidRemoveAttribute(attributeName);
      return this.hideDialog();
    }
    hideDialog() {
      const element = this.element.querySelector(activeDialogSelector);
      if (element) {
        var _this$delegate9;
        element.removeAttribute("data-trix-active");
        element.classList.remove("trix-active");
        this.resetDialogInputs();
        return (_this$delegate9 = this.delegate) === null || _this$delegate9 === void 0 ? void 0 : _this$delegate9.toolbarDidHideDialog(getDialogName(element));
      }
    }
    resetDialogInputs() {
      Array.from(this.element.querySelectorAll(dialogInputSelector)).forEach(input => {
        input.setAttribute("disabled", "disabled");
        input.removeAttribute("data-trix-validate");
        input.classList.remove("trix-validate");
      });
    }
    getDialog(dialogName) {
      return this.element.querySelector("[data-trix-dialog=".concat(dialogName, "]"));
    }
  }

  const snapshotsAreEqual = (a, b) => rangesAreEqual(a.selectedRange, b.selectedRange) && a.document.isEqualTo(b.document);
  class EditorController extends Controller {
    constructor(_ref) {
      let {
        editorElement,
        document,
        html
      } = _ref;
      super(...arguments);
      this.editorElement = editorElement;
      this.selectionManager = new SelectionManager(this.editorElement);
      this.selectionManager.delegate = this;
      this.composition = new Composition();
      this.composition.delegate = this;
      this.attachmentManager = new AttachmentManager(this.composition.getAttachments());
      this.attachmentManager.delegate = this;
      this.inputController = input.getLevel() === 2 ? new Level2InputController(this.editorElement) : new Level0InputController(this.editorElement);
      this.inputController.delegate = this;
      this.inputController.responder = this.composition;
      this.compositionController = new CompositionController(this.editorElement, this.composition);
      this.compositionController.delegate = this;
      this.toolbarController = new ToolbarController(this.editorElement.toolbarElement);
      this.toolbarController.delegate = this;
      this.editor = new Editor(this.composition, this.selectionManager, this.editorElement);
      if (document) {
        this.editor.loadDocument(document);
      } else {
        this.editor.loadHTML(html);
      }
    }
    registerSelectionManager() {
      return selectionChangeObserver.registerSelectionManager(this.selectionManager);
    }
    unregisterSelectionManager() {
      return selectionChangeObserver.unregisterSelectionManager(this.selectionManager);
    }
    render() {
      return this.compositionController.render();
    }
    reparse() {
      return this.composition.replaceHTML(this.editorElement.innerHTML);
    }

    // Composition delegate

    compositionDidChangeDocument(document) {
      this.notifyEditorElement("document-change");
      if (!this.handlingInput) {
        return this.render();
      }
    }
    compositionDidChangeCurrentAttributes(currentAttributes) {
      this.currentAttributes = currentAttributes;
      this.toolbarController.updateAttributes(this.currentAttributes);
      this.updateCurrentActions();
      return this.notifyEditorElement("attributes-change", {
        attributes: this.currentAttributes
      });
    }
    compositionDidPerformInsertionAtRange(range) {
      if (this.pasting) {
        this.pastedRange = range;
      }
    }
    compositionShouldAcceptFile(file) {
      return this.notifyEditorElement("file-accept", {
        file
      });
    }
    compositionDidAddAttachment(attachment) {
      const managedAttachment = this.attachmentManager.manageAttachment(attachment);
      return this.notifyEditorElement("attachment-add", {
        attachment: managedAttachment
      });
    }
    compositionDidEditAttachment(attachment) {
      this.compositionController.rerenderViewForObject(attachment);
      const managedAttachment = this.attachmentManager.manageAttachment(attachment);
      this.notifyEditorElement("attachment-edit", {
        attachment: managedAttachment
      });
      return this.notifyEditorElement("change");
    }
    compositionDidChangeAttachmentPreviewURL(attachment) {
      this.compositionController.invalidateViewForObject(attachment);
      return this.notifyEditorElement("change");
    }
    compositionDidRemoveAttachment(attachment) {
      const managedAttachment = this.attachmentManager.unmanageAttachment(attachment);
      return this.notifyEditorElement("attachment-remove", {
        attachment: managedAttachment
      });
    }
    compositionDidStartEditingAttachment(attachment, options) {
      this.attachmentLocationRange = this.composition.document.getLocationRangeOfAttachment(attachment);
      this.compositionController.installAttachmentEditorForAttachment(attachment, options);
      return this.selectionManager.setLocationRange(this.attachmentLocationRange);
    }
    compositionDidStopEditingAttachment(attachment) {
      this.compositionController.uninstallAttachmentEditor();
      this.attachmentLocationRange = null;
    }
    compositionDidRequestChangingSelectionToLocationRange(locationRange) {
      if (this.loadingSnapshot && !this.isFocused()) return;
      this.requestedLocationRange = locationRange;
      this.compositionRevisionWhenLocationRangeRequested = this.composition.revision;
      if (!this.handlingInput) {
        return this.render();
      }
    }
    compositionWillLoadSnapshot() {
      this.loadingSnapshot = true;
    }
    compositionDidLoadSnapshot() {
      this.compositionController.refreshViewCache();
      this.render();
      this.loadingSnapshot = false;
    }
    getSelectionManager() {
      return this.selectionManager;
    }

    // Attachment manager delegate

    attachmentManagerDidRequestRemovalOfAttachment(attachment) {
      return this.removeAttachment(attachment);
    }

    // Document controller delegate

    compositionControllerWillSyncDocumentView() {
      this.inputController.editorWillSyncDocumentView();
      this.selectionManager.lock();
      return this.selectionManager.clearSelection();
    }
    compositionControllerDidSyncDocumentView() {
      this.inputController.editorDidSyncDocumentView();
      this.selectionManager.unlock();
      this.updateCurrentActions();
      return this.notifyEditorElement("sync");
    }
    compositionControllerDidRender() {
      if (this.requestedLocationRange) {
        if (this.compositionRevisionWhenLocationRangeRequested === this.composition.revision) {
          this.selectionManager.setLocationRange(this.requestedLocationRange);
        }
        this.requestedLocationRange = null;
        this.compositionRevisionWhenLocationRangeRequested = null;
      }
      if (this.renderedCompositionRevision !== this.composition.revision) {
        this.runEditorFilters();
        this.composition.updateCurrentAttributes();
        this.notifyEditorElement("render");
      }
      this.renderedCompositionRevision = this.composition.revision;
    }
    compositionControllerDidFocus() {
      if (this.isFocusedInvisibly()) {
        this.setLocationRange({
          index: 0,
          offset: 0
        });
      }
      this.toolbarController.hideDialog();
      return this.notifyEditorElement("focus");
    }
    compositionControllerDidBlur() {
      return this.notifyEditorElement("blur");
    }
    compositionControllerDidSelectAttachment(attachment, options) {
      this.toolbarController.hideDialog();
      return this.composition.editAttachment(attachment, options);
    }
    compositionControllerDidRequestDeselectingAttachment(attachment) {
      const locationRange = this.attachmentLocationRange || this.composition.document.getLocationRangeOfAttachment(attachment);
      return this.selectionManager.setLocationRange(locationRange[1]);
    }
    compositionControllerWillUpdateAttachment(attachment) {
      return this.editor.recordUndoEntry("Edit Attachment", {
        context: attachment.id,
        consolidatable: true
      });
    }
    compositionControllerDidRequestRemovalOfAttachment(attachment) {
      return this.removeAttachment(attachment);
    }

    // Input controller delegate

    inputControllerWillHandleInput() {
      this.handlingInput = true;
      this.requestedRender = false;
    }
    inputControllerDidRequestRender() {
      this.requestedRender = true;
    }
    inputControllerDidHandleInput() {
      this.handlingInput = false;
      if (this.requestedRender) {
        this.requestedRender = false;
        return this.render();
      }
    }
    inputControllerDidAllowUnhandledInput() {
      return this.notifyEditorElement("change");
    }
    inputControllerDidRequestReparse() {
      return this.reparse();
    }
    inputControllerWillPerformTyping() {
      return this.recordTypingUndoEntry();
    }
    inputControllerWillPerformFormatting(attributeName) {
      return this.recordFormattingUndoEntry(attributeName);
    }
    inputControllerWillCutText() {
      return this.editor.recordUndoEntry("Cut");
    }
    inputControllerWillPaste(paste) {
      this.editor.recordUndoEntry("Paste");
      this.pasting = true;
      return this.notifyEditorElement("before-paste", {
        paste
      });
    }
    inputControllerDidPaste(paste) {
      paste.range = this.pastedRange;
      this.pastedRange = null;
      this.pasting = null;
      return this.notifyEditorElement("paste", {
        paste
      });
    }
    inputControllerWillMoveText() {
      return this.editor.recordUndoEntry("Move");
    }
    inputControllerWillAttachFiles() {
      return this.editor.recordUndoEntry("Drop Files");
    }
    inputControllerWillPerformUndo() {
      return this.editor.undo();
    }
    inputControllerWillPerformRedo() {
      return this.editor.redo();
    }
    inputControllerDidReceiveKeyboardCommand(keys) {
      return this.toolbarController.applyKeyboardCommand(keys);
    }
    inputControllerDidStartDrag() {
      this.locationRangeBeforeDrag = this.selectionManager.getLocationRange();
    }
    inputControllerDidReceiveDragOverPoint(point) {
      return this.selectionManager.setLocationRangeFromPointRange(point);
    }
    inputControllerDidCancelDrag() {
      this.selectionManager.setLocationRange(this.locationRangeBeforeDrag);
      this.locationRangeBeforeDrag = null;
    }

    // Selection manager delegate

    locationRangeDidChange(locationRange) {
      this.composition.updateCurrentAttributes();
      this.updateCurrentActions();
      if (this.attachmentLocationRange && !rangesAreEqual(this.attachmentLocationRange, locationRange)) {
        this.composition.stopEditingAttachment();
      }
      return this.notifyEditorElement("selection-change");
    }

    // Toolbar controller delegate

    toolbarDidClickButton() {
      if (!this.getLocationRange()) {
        return this.setLocationRange({
          index: 0,
          offset: 0
        });
      }
    }
    toolbarDidInvokeAction(actionName, invokingElement) {
      return this.invokeAction(actionName, invokingElement);
    }
    toolbarDidToggleAttribute(attributeName) {
      this.recordFormattingUndoEntry(attributeName);
      this.composition.toggleCurrentAttribute(attributeName);
      this.render();
      if (!this.selectionFrozen) {
        return this.editorElement.focus();
      }
    }
    toolbarDidUpdateAttribute(attributeName, value) {
      this.recordFormattingUndoEntry(attributeName);
      this.composition.setCurrentAttribute(attributeName, value);
      this.render();
      if (!this.selectionFrozen) {
        return this.editorElement.focus();
      }
    }
    toolbarDidRemoveAttribute(attributeName) {
      this.recordFormattingUndoEntry(attributeName);
      this.composition.removeCurrentAttribute(attributeName);
      this.render();
      if (!this.selectionFrozen) {
        return this.editorElement.focus();
      }
    }
    toolbarWillShowDialog(dialogElement) {
      this.composition.expandSelectionForEditing();
      return this.freezeSelection();
    }
    toolbarDidShowDialog(dialogName) {
      return this.notifyEditorElement("toolbar-dialog-show", {
        dialogName
      });
    }
    toolbarDidHideDialog(dialogName) {
      this.thawSelection();
      this.editorElement.focus();
      return this.notifyEditorElement("toolbar-dialog-hide", {
        dialogName
      });
    }

    // Selection

    freezeSelection() {
      if (!this.selectionFrozen) {
        this.selectionManager.lock();
        this.composition.freezeSelection();
        this.selectionFrozen = true;
        return this.render();
      }
    }
    thawSelection() {
      if (this.selectionFrozen) {
        this.composition.thawSelection();
        this.selectionManager.unlock();
        this.selectionFrozen = false;
        return this.render();
      }
    }
    canInvokeAction(actionName) {
      if (this.actionIsExternal(actionName)) {
        return true;
      } else {
        var _this$actions$actionN;
        return !!((_this$actions$actionN = this.actions[actionName]) !== null && _this$actions$actionN !== void 0 && (_this$actions$actionN = _this$actions$actionN.test) !== null && _this$actions$actionN !== void 0 && _this$actions$actionN.call(this));
      }
    }
    invokeAction(actionName, invokingElement) {
      if (this.actionIsExternal(actionName)) {
        return this.notifyEditorElement("action-invoke", {
          actionName,
          invokingElement
        });
      } else {
        var _this$actions$actionN2;
        return (_this$actions$actionN2 = this.actions[actionName]) === null || _this$actions$actionN2 === void 0 || (_this$actions$actionN2 = _this$actions$actionN2.perform) === null || _this$actions$actionN2 === void 0 ? void 0 : _this$actions$actionN2.call(this);
      }
    }
    actionIsExternal(actionName) {
      return /^x-./.test(actionName);
    }
    getCurrentActions() {
      const result = {};
      for (const actionName in this.actions) {
        result[actionName] = this.canInvokeAction(actionName);
      }
      return result;
    }
    updateCurrentActions() {
      const currentActions = this.getCurrentActions();
      if (!objectsAreEqual(currentActions, this.currentActions)) {
        this.currentActions = currentActions;
        this.toolbarController.updateActions(this.currentActions);
        return this.notifyEditorElement("actions-change", {
          actions: this.currentActions
        });
      }
    }

    // Editor filters

    runEditorFilters() {
      let snapshot = this.composition.getSnapshot();
      Array.from(this.editor.filters).forEach(filter => {
        const {
          document,
          selectedRange
        } = snapshot;
        snapshot = filter.call(this.editor, snapshot) || {};
        if (!snapshot.document) {
          snapshot.document = document;
        }
        if (!snapshot.selectedRange) {
          snapshot.selectedRange = selectedRange;
        }
      });
      if (!snapshotsAreEqual(snapshot, this.composition.getSnapshot())) {
        return this.composition.loadSnapshot(snapshot);
      }
    }

    // Private

    updateInputElement() {
      const element = this.compositionController.getSerializableElement();
      const value = serializeToContentType(element, "text/html");
      return this.editorElement.setFormValue(value);
    }
    notifyEditorElement(message, data) {
      switch (message) {
        case "document-change":
          this.documentChangedSinceLastRender = true;
          break;
        case "render":
          if (this.documentChangedSinceLastRender) {
            this.documentChangedSinceLastRender = false;
            this.notifyEditorElement("change");
          }
          break;
        case "change":
        case "attachment-add":
        case "attachment-edit":
        case "attachment-remove":
          this.updateInputElement();
          break;
      }
      return this.editorElement.notify(message, data);
    }
    removeAttachment(attachment) {
      this.editor.recordUndoEntry("Delete Attachment");
      this.composition.removeAttachment(attachment);
      return this.render();
    }
    recordFormattingUndoEntry(attributeName) {
      const blockConfig = getBlockConfig(attributeName);
      const locationRange = this.selectionManager.getLocationRange();
      if (blockConfig || !rangeIsCollapsed(locationRange)) {
        return this.editor.recordUndoEntry("Formatting", {
          context: this.getUndoContext(),
          consolidatable: true
        });
      }
    }
    recordTypingUndoEntry() {
      return this.editor.recordUndoEntry("Typing", {
        context: this.getUndoContext(this.currentAttributes),
        consolidatable: true
      });
    }
    getUndoContext() {
      for (var _len = arguments.length, context = new Array(_len), _key = 0; _key < _len; _key++) {
        context[_key] = arguments[_key];
      }
      return [this.getLocationContext(), this.getTimeContext(), ...Array.from(context)];
    }
    getLocationContext() {
      const locationRange = this.selectionManager.getLocationRange();
      if (rangeIsCollapsed(locationRange)) {
        return locationRange[0].index;
      } else {
        return locationRange;
      }
    }
    getTimeContext() {
      if (undo.interval > 0) {
        return Math.floor(new Date().getTime() / undo.interval);
      } else {
        return 0;
      }
    }
    isFocused() {
      var _this$editorElement$o;
      return this.editorElement === ((_this$editorElement$o = this.editorElement.ownerDocument) === null || _this$editorElement$o === void 0 ? void 0 : _this$editorElement$o.activeElement);
    }

    // Detect "Cursor disappears sporadically" Firefox bug.
    // - https://bugzilla.mozilla.org/show_bug.cgi?id=226301
    isFocusedInvisibly() {
      return this.isFocused() && !this.getLocationRange();
    }
    get actions() {
      return this.constructor.actions;
    }
  }
  _defineProperty(EditorController, "actions", {
    undo: {
      test() {
        return this.editor.canUndo();
      },
      perform() {
        return this.editor.undo();
      }
    },
    redo: {
      test() {
        return this.editor.canRedo();
      },
      perform() {
        return this.editor.redo();
      }
    },
    link: {
      test() {
        return this.editor.canActivateAttribute("href");
      }
    },
    increaseNestingLevel: {
      test() {
        return this.editor.canIncreaseNestingLevel();
      },
      perform() {
        return this.editor.increaseNestingLevel() && this.render();
      }
    },
    decreaseNestingLevel: {
      test() {
        return this.editor.canDecreaseNestingLevel();
      },
      perform() {
        return this.editor.decreaseNestingLevel() && this.render();
      }
    },
    attachFiles: {
      test() {
        return true;
      },
      perform() {
        return input.pickFiles(this.editor.insertFiles);
      }
    }
  });
  EditorController.proxyMethod("getSelectionManager().setLocationRange");
  EditorController.proxyMethod("getSelectionManager().getLocationRange");

  var controllers = /*#__PURE__*/Object.freeze({
    __proto__: null,
    AttachmentEditorController: AttachmentEditorController,
    CompositionController: CompositionController,
    Controller: Controller,
    EditorController: EditorController,
    InputController: InputController,
    Level0InputController: Level0InputController,
    Level2InputController: Level2InputController,
    ToolbarController: ToolbarController
  });

  var observers = /*#__PURE__*/Object.freeze({
    __proto__: null,
    MutationObserver: MutationObserver,
    SelectionChangeObserver: SelectionChangeObserver
  });

  var operations = /*#__PURE__*/Object.freeze({
    __proto__: null,
    FileVerificationOperation: FileVerificationOperation,
    ImagePreloadOperation: ImagePreloadOperation
  });

  installDefaultCSSForTagName("trix-toolbar", "%t {\n  display: block;\n}\n\n%t {\n  white-space: nowrap;\n}\n\n%t [data-trix-dialog] {\n  display: none;\n}\n\n%t [data-trix-dialog][data-trix-active] {\n  display: block;\n}\n\n%t [data-trix-dialog] [data-trix-validate]:invalid {\n  background-color: #ffdddd;\n}");
  class TrixToolbarElement extends HTMLElement {
    // Element lifecycle

    connectedCallback() {
      if (this.innerHTML === "") {
        this.innerHTML = toolbar.getDefaultHTML();
      }
    }
  }

  let id = 0;

  // Contenteditable support helpers

  const autofocus = function (element) {
    if (!document.querySelector(":focus")) {
      if (element.hasAttribute("autofocus") && document.querySelector("[autofocus]") === element) {
        return element.focus();
      }
    }
  };
  const makeEditable = function (element) {
    if (element.hasAttribute("contenteditable")) {
      return;
    }
    element.setAttribute("contenteditable", "");
    return handleEventOnce("focus", {
      onElement: element,
      withCallback() {
        return configureContentEditable(element);
      }
    });
  };
  const configureContentEditable = function (element) {
    disableObjectResizing(element);
    return setDefaultParagraphSeparator(element);
  };
  const disableObjectResizing = function (element) {
    var _document$queryComman, _document;
    if ((_document$queryComman = (_document = document).queryCommandSupported) !== null && _document$queryComman !== void 0 && _document$queryComman.call(_document, "enableObjectResizing")) {
      document.execCommand("enableObjectResizing", false, false);
      return handleEvent("mscontrolselect", {
        onElement: element,
        preventDefault: true
      });
    }
  };
  const setDefaultParagraphSeparator = function (element) {
    var _document$queryComman2, _document2;
    if ((_document$queryComman2 = (_document2 = document).queryCommandSupported) !== null && _document$queryComman2 !== void 0 && _document$queryComman2.call(_document2, "DefaultParagraphSeparator")) {
      const {
        tagName
      } = attributes.default;
      if (["div", "p"].includes(tagName)) {
        return document.execCommand("DefaultParagraphSeparator", false, tagName);
      }
    }
  };

  // Accessibility helpers

  const addAccessibilityRole = function (element) {
    if (element.hasAttribute("role")) {
      return;
    }
    return element.setAttribute("role", "textbox");
  };
  const ensureAriaLabel = function (element) {
    if (element.hasAttribute("aria-label") || element.hasAttribute("aria-labelledby")) {
      return;
    }
    const update = function () {
      const texts = Array.from(element.labels).map(label => {
        if (!label.contains(element)) return label.textContent;
      }).filter(text => text);
      const text = texts.join(" ");
      if (text) {
        return element.setAttribute("aria-label", text);
      } else {
        return element.removeAttribute("aria-label");
      }
    };
    update();
    return handleEvent("focus", {
      onElement: element,
      withCallback: update
    });
  };

  // Style

  const cursorTargetStyles = function () {
    if (browser$1.forcesObjectResizing) {
      return {
        display: "inline",
        width: "auto"
      };
    } else {
      return {
        display: "inline-block",
        width: "1px"
      };
    }
  }();
  installDefaultCSSForTagName("trix-editor", "%t {\n    display: block;\n}\n\n%t:empty::before {\n    content: attr(placeholder);\n    color: graytext;\n    cursor: text;\n    pointer-events: none;\n    white-space: pre-line;\n}\n\n%t a[contenteditable=false] {\n    cursor: text;\n}\n\n%t img {\n    max-width: 100%;\n    height: auto;\n}\n\n%t ".concat(attachmentSelector, " figcaption textarea {\n    resize: none;\n}\n\n%t ").concat(attachmentSelector, " figcaption textarea.trix-autoresize-clone {\n    position: absolute;\n    left: -9999px;\n    max-height: 0px;\n}\n\n%t ").concat(attachmentSelector, " figcaption[data-trix-placeholder]:empty::before {\n    content: attr(data-trix-placeholder);\n    color: graytext;\n}\n\n%t [data-trix-cursor-target] {\n    display: ").concat(cursorTargetStyles.display, " !important;\n    width: ").concat(cursorTargetStyles.width, " !important;\n    padding: 0 !important;\n    margin: 0 !important;\n    border: none !important;\n}\n\n%t [data-trix-cursor-target=left] {\n    vertical-align: top !important;\n    margin-left: -1px !important;\n}\n\n%t [data-trix-cursor-target=right] {\n    vertical-align: bottom !important;\n    margin-right: -1px !important;\n}"));
  var _internals = /*#__PURE__*/new WeakMap();
  var _validate = /*#__PURE__*/new WeakSet();
  class ElementInternalsDelegate {
    constructor(element) {
      _classPrivateMethodInitSpec(this, _validate);
      _classPrivateFieldInitSpec(this, _internals, {
        writable: true,
        value: void 0
      });
      this.element = element;
      _classPrivateFieldSet(this, _internals, element.attachInternals());
    }
    connectedCallback() {
      _classPrivateMethodGet(this, _validate, _validate2).call(this);
    }
    disconnectedCallback() {}
    get labels() {
      return _classPrivateFieldGet(this, _internals).labels;
    }
    get disabled() {
      var _this$element$inputEl;
      return (_this$element$inputEl = this.element.inputElement) === null || _this$element$inputEl === void 0 ? void 0 : _this$element$inputEl.disabled;
    }
    set disabled(value) {
      this.element.toggleAttribute("disabled", value);
    }
    get required() {
      return this.element.hasAttribute("required");
    }
    set required(value) {
      this.element.toggleAttribute("required", value);
      _classPrivateMethodGet(this, _validate, _validate2).call(this);
    }
    get validity() {
      return _classPrivateFieldGet(this, _internals).validity;
    }
    get validationMessage() {
      return _classPrivateFieldGet(this, _internals).validationMessage;
    }
    get willValidate() {
      return _classPrivateFieldGet(this, _internals).willValidate;
    }
    setFormValue(value) {
      _classPrivateMethodGet(this, _validate, _validate2).call(this);
    }
    checkValidity() {
      return _classPrivateFieldGet(this, _internals).checkValidity();
    }
    reportValidity() {
      return _classPrivateFieldGet(this, _internals).reportValidity();
    }
    setCustomValidity(validationMessage) {
      _classPrivateMethodGet(this, _validate, _validate2).call(this, validationMessage);
    }
  }
  function _validate2() {
    let customValidationMessage = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : "";
    const {
      required,
      value
    } = this.element;
    const valueMissing = required && !value;
    const customError = !!customValidationMessage;
    const input = makeElement("input", {
      required
    });
    const validationMessage = customValidationMessage || input.validationMessage;
    _classPrivateFieldGet(this, _internals).setValidity({
      valueMissing,
      customError
    }, validationMessage);
  }
  var _focusHandler = /*#__PURE__*/new WeakMap();
  var _resetBubbled = /*#__PURE__*/new WeakMap();
  var _clickBubbled = /*#__PURE__*/new WeakMap();
  class LegacyDelegate {
    constructor(element) {
      _classPrivateFieldInitSpec(this, _focusHandler, {
        writable: true,
        value: void 0
      });
      _classPrivateFieldInitSpec(this, _resetBubbled, {
        writable: true,
        value: event => {
          if (event.defaultPrevented) return;
          if (event.target !== this.element.form) return;
          this.element.reset();
        }
      });
      _classPrivateFieldInitSpec(this, _clickBubbled, {
        writable: true,
        value: event => {
          if (event.defaultPrevented) return;
          if (this.element.contains(event.target)) return;
          const label = findClosestElementFromNode(event.target, {
            matchingSelector: "label"
          });
          if (!label) return;
          if (!Array.from(this.labels).includes(label)) return;
          this.element.focus();
        }
      });
      this.element = element;
    }
    connectedCallback() {
      _classPrivateFieldSet(this, _focusHandler, ensureAriaLabel(this.element));
      window.addEventListener("reset", _classPrivateFieldGet(this, _resetBubbled), false);
      window.addEventListener("click", _classPrivateFieldGet(this, _clickBubbled), false);
    }
    disconnectedCallback() {
      var _classPrivateFieldGet2;
      (_classPrivateFieldGet2 = _classPrivateFieldGet(this, _focusHandler)) === null || _classPrivateFieldGet2 === void 0 || _classPrivateFieldGet2.destroy();
      window.removeEventListener("reset", _classPrivateFieldGet(this, _resetBubbled), false);
      window.removeEventListener("click", _classPrivateFieldGet(this, _clickBubbled), false);
    }
    get labels() {
      const labels = [];
      if (this.element.id && this.element.ownerDocument) {
        labels.push(...Array.from(this.element.ownerDocument.querySelectorAll("label[for='".concat(this.element.id, "']")) || []));
      }
      const label = findClosestElementFromNode(this.element, {
        matchingSelector: "label"
      });
      if (label) {
        if ([this.element, null].includes(label.control)) {
          labels.push(label);
        }
      }
      return labels;
    }
    get disabled() {
      console.warn("This browser does not support the [disabled] attribute for trix-editor elements.");
      return false;
    }
    set disabled(value) {
      console.warn("This browser does not support the [disabled] attribute for trix-editor elements.");
    }
    get required() {
      console.warn("This browser does not support the [required] attribute for trix-editor elements.");
      return false;
    }
    set required(value) {
      console.warn("This browser does not support the [required] attribute for trix-editor elements.");
    }
    get validity() {
      console.warn("This browser does not support the validity property for trix-editor elements.");
      return null;
    }
    get validationMessage() {
      console.warn("This browser does not support the validationMessage property for trix-editor elements.");
      return "";
    }
    get willValidate() {
      console.warn("This browser does not support the willValidate property for trix-editor elements.");
      return false;
    }
    setFormValue(value) {}
    checkValidity() {
      console.warn("This browser does not support checkValidity() for trix-editor elements.");
      return true;
    }
    reportValidity() {
      console.warn("This browser does not support reportValidity() for trix-editor elements.");
      return true;
    }
    setCustomValidity(validationMessage) {
      console.warn("This browser does not support setCustomValidity(validationMessage) for trix-editor elements.");
    }
  }
  var _delegate = /*#__PURE__*/new WeakMap();
  class TrixEditorElement extends HTMLElement {
    constructor() {
      super();
      _classPrivateFieldInitSpec(this, _delegate, {
        writable: true,
        value: void 0
      });
      _classPrivateFieldSet(this, _delegate, this.constructor.formAssociated ? new ElementInternalsDelegate(this) : new LegacyDelegate(this));
    }

    // Properties

    get trixId() {
      if (this.hasAttribute("trix-id")) {
        return this.getAttribute("trix-id");
      } else {
        this.setAttribute("trix-id", ++id);
        return this.trixId;
      }
    }
    get labels() {
      return _classPrivateFieldGet(this, _delegate).labels;
    }
    get disabled() {
      return _classPrivateFieldGet(this, _delegate).disabled;
    }
    set disabled(value) {
      _classPrivateFieldGet(this, _delegate).disabled = value;
    }
    get required() {
      return _classPrivateFieldGet(this, _delegate).required;
    }
    set required(value) {
      _classPrivateFieldGet(this, _delegate).required = value;
    }
    get validity() {
      return _classPrivateFieldGet(this, _delegate).validity;
    }
    get validationMessage() {
      return _classPrivateFieldGet(this, _delegate).validationMessage;
    }
    get willValidate() {
      return _classPrivateFieldGet(this, _delegate).willValidate;
    }
    get type() {
      return this.localName;
    }
    get toolbarElement() {
      if (this.hasAttribute("toolbar")) {
        var _this$ownerDocument;
        return (_this$ownerDocument = this.ownerDocument) === null || _this$ownerDocument === void 0 ? void 0 : _this$ownerDocument.getElementById(this.getAttribute("toolbar"));
      } else if (this.parentNode) {
        const toolbarId = "trix-toolbar-".concat(this.trixId);
        this.setAttribute("toolbar", toolbarId);
        const element = makeElement("trix-toolbar", {
          id: toolbarId
        });
        this.parentNode.insertBefore(element, this);
        return element;
      } else {
        return undefined;
      }
    }
    get form() {
      var _this$inputElement;
      return (_this$inputElement = this.inputElement) === null || _this$inputElement === void 0 ? void 0 : _this$inputElement.form;
    }
    get inputElement() {
      if (this.hasAttribute("input")) {
        var _this$ownerDocument2;
        return (_this$ownerDocument2 = this.ownerDocument) === null || _this$ownerDocument2 === void 0 ? void 0 : _this$ownerDocument2.getElementById(this.getAttribute("input"));
      } else if (this.parentNode) {
        const inputId = "trix-input-".concat(this.trixId);
        this.setAttribute("input", inputId);
        const element = makeElement("input", {
          type: "hidden",
          id: inputId
        });
        this.parentNode.insertBefore(element, this.nextElementSibling);
        return element;
      } else {
        return undefined;
      }
    }
    get editor() {
      var _this$editorControlle;
      return (_this$editorControlle = this.editorController) === null || _this$editorControlle === void 0 ? void 0 : _this$editorControlle.editor;
    }
    get name() {
      var _this$inputElement2;
      return (_this$inputElement2 = this.inputElement) === null || _this$inputElement2 === void 0 ? void 0 : _this$inputElement2.name;
    }
    get value() {
      var _this$inputElement3;
      return (_this$inputElement3 = this.inputElement) === null || _this$inputElement3 === void 0 ? void 0 : _this$inputElement3.value;
    }
    set value(defaultValue) {
      var _this$editor;
      this.defaultValue = defaultValue;
      (_this$editor = this.editor) === null || _this$editor === void 0 || _this$editor.loadHTML(this.defaultValue);
    }

    // Controller delegate methods

    notify(message, data) {
      if (this.editorController) {
        return triggerEvent("trix-".concat(message), {
          onElement: this,
          attributes: data
        });
      }
    }
    setFormValue(value) {
      if (this.inputElement) {
        this.inputElement.value = value;
        _classPrivateFieldGet(this, _delegate).setFormValue(value);
      }
    }

    // Element lifecycle

    connectedCallback() {
      if (!this.hasAttribute("data-trix-internal")) {
        makeEditable(this);
        addAccessibilityRole(this);
        if (!this.editorController) {
          triggerEvent("trix-before-initialize", {
            onElement: this
          });
          this.editorController = new EditorController({
            editorElement: this,
            html: this.defaultValue = this.value
          });
          requestAnimationFrame(() => triggerEvent("trix-initialize", {
            onElement: this
          }));
        }
        this.editorController.registerSelectionManager();
        _classPrivateFieldGet(this, _delegate).connectedCallback();
        autofocus(this);
      }
    }
    disconnectedCallback() {
      var _this$editorControlle2;
      (_this$editorControlle2 = this.editorController) === null || _this$editorControlle2 === void 0 || _this$editorControlle2.unregisterSelectionManager();
      _classPrivateFieldGet(this, _delegate).disconnectedCallback();
    }

    // Form support

    checkValidity() {
      return _classPrivateFieldGet(this, _delegate).checkValidity();
    }
    reportValidity() {
      return _classPrivateFieldGet(this, _delegate).reportValidity();
    }
    setCustomValidity(validationMessage) {
      _classPrivateFieldGet(this, _delegate).setCustomValidity(validationMessage);
    }
    formDisabledCallback(disabled) {
      if (this.inputElement) {
        this.inputElement.disabled = disabled;
      }
      this.toggleAttribute("contenteditable", !disabled);
    }
    formResetCallback() {
      this.reset();
    }
    reset() {
      this.value = this.defaultValue;
    }
  }
  _defineProperty(TrixEditorElement, "formAssociated", "ElementInternals" in window);

  var elements = /*#__PURE__*/Object.freeze({
    __proto__: null,
    TrixEditorElement: TrixEditorElement,
    TrixToolbarElement: TrixToolbarElement
  });

  var filters = /*#__PURE__*/Object.freeze({
    __proto__: null,
    Filter: Filter,
    attachmentGalleryFilter: attachmentGalleryFilter
  });

  const Trix = {
    VERSION: version,
    config,
    core,
    models,
    views,
    controllers,
    observers,
    operations,
    elements,
    filters
  };

  // Expose models under the Trix constant for compatibility with v1
  Object.assign(Trix, models);
  function start() {
    if (!customElements.get("trix-toolbar")) {
      customElements.define("trix-toolbar", TrixToolbarElement);
    }
    if (!customElements.get("trix-editor")) {
      customElements.define("trix-editor", TrixEditorElement);
    }
  }
  window.Trix = Trix;
  setTimeout(start, 0);

  return Trix;

}));
