/**
 * findAndReplaceDOMText v 0.4.6
 * @author James Padolsey http://james.padolsey.com
 * @license http://unlicense.org/UNLICENSE
 *
 * Matches the text of a DOM node against a regular expression
 * and replaces each match (or node-separated portions of the match)
 * in the specified element.
 */
(function (root, factory) {
  if (typeof module === "object" && module.exports) {
    // Node/CommonJS
    module.exports = factory();
  } else if (typeof define === "function" && define.amd) {
    // AMD. Register as an anonymous module.
    define(factory);
  } else {
    // Browser globals
    root.findAndReplaceDOMText = factory();
  }
})(this, function factory() {
  var PORTION_MODE_RETAIN = "retain";
  var PORTION_MODE_FIRST = "first";

  var doc = document;
  var hasOwn = {}.hasOwnProperty;

  function escapeRegExp(s) {
    return String(s).replace(/([.*+?^=!:${}()|[\]\/\\])/g, "\\$1");
  }

  function exposed() {
    // Try deprecated arg signature first:
    return (
      deprecated.apply(null, arguments) ||
      findAndReplaceDOMText.apply(null, arguments)
    );
  }

  function deprecated(regex, node, replacement, captureGroup, elFilter) {
    if (node && !node.nodeType && arguments.length <= 2) {
      return false;
    }
    var isReplacementFunction = typeof replacement == "function";

    if (isReplacementFunction) {
      replacement = (function (original) {
        return function (portion, match) {
          return original(portion.text, match.startIndex);
        };
      })(replacement);
    }

    // Awkward support for deprecated argument signature (<0.4.0)
    var instance = findAndReplaceDOMText(node, {
      find: regex,

      wrap: isReplacementFunction ? null : replacement,
      replace: isReplacementFunction
        ? replacement
        : "$" + (captureGroup || "&"),

      prepMatch: function (m, mi) {
        // Support captureGroup (a deprecated feature)

        if (!m[0])
          throw "findAndReplaceDOMText cannot handle zero-length matches";

        if (captureGroup > 0) {
          var cg = m[captureGroup];
          m.index += m[0].indexOf(cg);
          m[0] = cg;
        }

        m.endIndex = m.index + m[0].length;
        m.startIndex = m.index;
        m.index = mi;

        return m;
      },
      filterElements: elFilter,
    });

    exposed.revert = function () {
      return instance.revert();
    };

    return true;
  }

  /**
   * findAndReplaceDOMText
   *
   * Locates matches and replaces with replacementNode
   *
   * @param {Node} node Element or Text node to search within
   * @param {RegExp} options.find The regular expression to match
   * @param {String|Element} [options.wrap] A NodeName, or a Node to clone
   * @param {String} [options.wrapClass] A classname to append to the wrapping element
   * @param {String|Function} [options.replace='$&'] What to replace each match with
   * @param {Function} [options.filterElements] A Function to be called to check whether to
   *	process an element. (returning true = process element,
   *	returning false = avoid element)
   */
  function findAndReplaceDOMText(node, options) {
    return new Finder(node, options);
  }

  exposed.NON_PROSE_ELEMENTS = {
    br: 1,
    hr: 1,
    // Media / Source elements:
    script: 1,
    style: 1,
    img: 1,
    video: 1,
    audio: 1,
    canvas: 1,
    svg: 1,
    map: 1,
    object: 1,
    // Input elements
    input: 1,
    textarea: 1,
    select: 1,
    option: 1,
    optgroup: 1,
    button: 1,
  };

  exposed.NON_CONTIGUOUS_PROSE_ELEMENTS = {
    // Elements that will not contain prose or block elements where we don't
    // want prose to be matches across element borders:

    // Block Elements
    address: 1,
    article: 1,
    aside: 1,
    blockquote: 1,
    dd: 1,
    div: 1,
    dl: 1,
    fieldset: 1,
    figcaption: 1,
    figure: 1,
    footer: 1,
    form: 1,
    h1: 1,
    h2: 1,
    h3: 1,
    h4: 1,
    h5: 1,
    h6: 1,
    header: 1,
    hgroup: 1,
    hr: 1,
    main: 1,
    nav: 1,
    noscript: 1,
    ol: 1,
    output: 1,
    p: 1,
    pre: 1,
    section: 1,
    ul: 1,
    // Other misc. elements that are not part of continuous inline prose:
    br: 1,
    li: 1,
    summary: 1,
    dt: 1,
    details: 1,
    rp: 1,
    rt: 1,
    rtc: 1,
    // Media / Source elements:
    script: 1,
    style: 1,
    img: 1,
    video: 1,
    audio: 1,
    canvas: 1,
    svg: 1,
    map: 1,
    object: 1,
    // Input elements
    input: 1,
    textarea: 1,
    select: 1,
    option: 1,
    optgroup: 1,
    button: 1,
    // Table related elements:
    table: 1,
    tbody: 1,
    thead: 1,
    th: 1,
    tr: 1,
    td: 1,
    caption: 1,
    col: 1,
    tfoot: 1,
    colgroup: 1,
  };

  exposed.NON_INLINE_PROSE = function (el) {
    return hasOwn.call(
      exposed.NON_CONTIGUOUS_PROSE_ELEMENTS,
      el.nodeName.toLowerCase()
    );
  };

  // Presets accessed via `options.preset` when calling findAndReplaceDOMText():
  exposed.PRESETS = {
    prose: {
      forceContext: exposed.NON_INLINE_PROSE,
      filterElements: function (el) {
        return !hasOwn.call(
          exposed.NON_PROSE_ELEMENTS,
          el.nodeName.toLowerCase()
        );
      },
    },
  };

  exposed.Finder = Finder;

  /**
   * Finder -- encapsulates logic to find and replace.
   */
  function Finder(node, options) {
    var preset = options.preset && exposed.PRESETS[options.preset];

    options.portionMode = options.portionMode || PORTION_MODE_RETAIN;

    if (preset) {
      for (var i in preset) {
        if (hasOwn.call(preset, i) && !hasOwn.call(options, i)) {
          options[i] = preset[i];
        }
      }
    }

    this.node = node;
    this.options = options;

    // Enable match-preparation method to be passed as option:
    this.prepMatch = options.prepMatch || this.prepMatch;

    this.reverts = [];

    this.matches = this.search();

    if (this.matches.length) {
      this.processMatches();
    }
  }

  Finder.prototype = {
    /**
     * Searches for all matches that comply with the instance's 'match' option
     */
    search: function () {
      var match;
      var matchIndex = 0;
      var offset = 0;
      var regex = this.options.find;
      var textAggregation = this.getAggregateText();
      var matches = [];
      var self = this;

      regex =
        typeof regex === "string" ? RegExp(escapeRegExp(regex), "g") : regex;

      matchAggregation(textAggregation);

      function matchAggregation(textAggregation) {
        for (var i = 0, l = textAggregation.length; i < l; ++i) {
          var text = textAggregation[i];

          if (typeof text !== "string") {
            // Deal with nested contexts: (recursive)
            matchAggregation(text);
            continue;
          }

          if (regex.global) {
            while ((match = regex.exec(text))) {
              matches.push(self.prepMatch(match, matchIndex++, offset));
            }
          } else {
            if ((match = text.match(regex))) {
              matches.push(self.prepMatch(match, 0, offset));
            }
          }

          offset += text.length;
        }
      }

      return matches;
    },

    /**
     * Prepares a single match with useful meta info:
     */
    prepMatch: function (match, matchIndex, characterOffset) {
      if (!match[0]) {
        throw new Error(
          "findAndReplaceDOMText cannot handle zero-length matches"
        );
      }

      match.endIndex = characterOffset + match.index + match[0].length;
      match.startIndex = characterOffset + match.index;
      match.index = matchIndex;

      return match;
    },

    /**
     * Gets aggregate text within subject node
     */
    getAggregateText: function () {
      var elementFilter = this.options.filterElements;
      var forceContext = this.options.forceContext;

      return getText(this.node);

      /**
       * Gets aggregate text of a node without resorting
       * to broken innerText/textContent
       */
      function getText(node) {
        if (node.nodeType === Node.TEXT_NODE) {
          return [node.data];
        }

        if (elementFilter && !elementFilter(node)) {
          return [];
        }

        var txt = [""];
        var i = 0;

        if ((node = node.firstChild))
          do {
            if (node.nodeType === Node.TEXT_NODE) {
              txt[i] += node.data;
              continue;
            }

            var innerText = getText(node);

            if (
              forceContext &&
              node.nodeType === Node.ELEMENT_NODE &&
              (forceContext === true || forceContext(node))
            ) {
              txt[++i] = innerText;
              txt[++i] = "";
            } else {
              if (typeof innerText[0] === "string") {
                // Bridge nested text-node data so that they're
                // not considered their own contexts:
                // I.e. ['some', ['thing']] -> ['something']
                txt[i] += innerText.shift();
              }
              if (innerText.length) {
                txt[++i] = innerText;
                txt[++i] = "";
              }
            }
          } while ((node = node.nextSibling));

        return txt;
      }
    },

    /**
     * Steps through the target node, looking for matches, and
     * calling replaceFn when a match is found.
     */
    processMatches: function () {
      var matches = this.matches;
      var node = this.node;
      var elementFilter = this.options.filterElements;

      var startPortion,
        endPortion,
        innerPortions = [],
        curNode = node,
        match = matches.shift(),
        atIndex = 0, // i.e. nodeAtIndex
        matchIndex = 0,
        portionIndex = 0,
        doAvoidNode,
        nodeStack = [node];

      out: while (true) {
        if (curNode.nodeType === Node.TEXT_NODE) {
          if (!endPortion && curNode.length + atIndex >= match.endIndex) {
            // We've found the ending
            // (Note that, in the case of a single portion, it'll be an
            // endPortion, not a startPortion.)
            endPortion = {
              node: curNode,
              index: portionIndex++,
              text: curNode.data.substring(
                match.startIndex - atIndex,
                match.endIndex - atIndex
              ),

              // If it's the first match (atIndex==0) we should just return 0
              indexInMatch: atIndex === 0 ? 0 : atIndex - match.startIndex,

              indexInNode: match.startIndex - atIndex,
              endIndexInNode: match.endIndex - atIndex,
              isEnd: true,
            };
          } else if (startPortion) {
            // Intersecting node
            innerPortions.push({
              node: curNode,
              index: portionIndex++,
              text: curNode.data,
              indexInMatch: atIndex - match.startIndex,
              indexInNode: 0, // always zero for inner-portions
            });
          }

          if (!startPortion && curNode.length + atIndex > match.startIndex) {
            // We've found the match start
            startPortion = {
              node: curNode,
              index: portionIndex++,
              indexInMatch: 0,
              indexInNode: match.startIndex - atIndex,
              endIndexInNode: match.endIndex - atIndex,
              text: curNode.data.substring(
                match.startIndex - atIndex,
                match.endIndex - atIndex
              ),
            };
          }

          atIndex += curNode.data.length;
        }

        doAvoidNode =
          curNode.nodeType === Node.ELEMENT_NODE &&
          elementFilter &&
          !elementFilter(curNode);

        if (startPortion && endPortion) {
          curNode = this.replaceMatch(
            match,
            startPortion,
            innerPortions,
            endPortion
          );

          // processMatches has to return the node that replaced the endNode
          // and then we step back so we can continue from the end of the
          // match:

          atIndex -= endPortion.node.data.length - endPortion.endIndexInNode;

          startPortion = null;
          endPortion = null;
          innerPortions = [];
          match = matches.shift();
          portionIndex = 0;
          matchIndex++;

          if (!match) {
            break; // no more matches
          }
        } else if (
          !doAvoidNode &&
          (curNode.firstChild || curNode.nextSibling)
        ) {
          // Move down or forward:
          if (curNode.firstChild) {
            nodeStack.push(curNode);
            curNode = curNode.firstChild;
          } else {
            curNode = curNode.nextSibling;
          }
          continue;
        }

        // Move forward or up:
        while (true) {
          if (curNode.nextSibling) {
            curNode = curNode.nextSibling;
            break;
          }
          curNode = nodeStack.pop();
          if (curNode === node) {
            break out;
          }
        }
      }
    },

    /**
     * Reverts ... TODO
     */
    revert: function () {
      // Reversion occurs backwards so as to avoid nodes subsequently
      // replaced during the matching phase (a forward process):
      for (var l = this.reverts.length; l--; ) {
        this.reverts[l]();
      }
      this.reverts = [];
    },

    prepareReplacementString: function (string, portion, match) {
      var portionMode = this.options.portionMode;
      if (portionMode === PORTION_MODE_FIRST && portion.indexInMatch > 0) {
        return "";
      }
      string = string.replace(/\$(\d+|&|`|')/g, function ($0, t) {
        var replacement;
        switch (t) {
          case "&":
            replacement = match[0];
            break;
          case "`":
            replacement = match.input.substring(0, match.startIndex);
            break;
          case "'":
            replacement = match.input.substring(match.endIndex);
            break;
          default:
            replacement = match[+t] || "";
        }
        return replacement;
      });

      if (portionMode === PORTION_MODE_FIRST) {
        return string;
      }

      if (portion.isEnd) {
        return string.substring(portion.indexInMatch);
      }

      return string.substring(
        portion.indexInMatch,
        portion.indexInMatch + portion.text.length
      );
    },

    getPortionReplacementNode: function (portion, match) {
      var replacement = this.options.replace || "$&";
      var wrapper = this.options.wrap;
      var wrapperClass = this.options.wrapClass;

      if (wrapper && wrapper.nodeType) {
        // Wrapper has been provided as a stencil-node for us to clone:
        var clone = doc.createElement("div");
        clone.innerHTML =
          wrapper.outerHTML || new XMLSerializer().serializeToString(wrapper);
        wrapper = clone.firstChild;
      }

      if (typeof replacement == "function") {
        replacement = replacement(portion, match);
        if (replacement && replacement.nodeType) {
          return replacement;
        }
        return doc.createTextNode(String(replacement));
      }

      var el =
        typeof wrapper == "string" ? doc.createElement(wrapper) : wrapper;

      if (el && wrapperClass) {
        el.className = wrapperClass;
      }

      replacement = doc.createTextNode(
        this.prepareReplacementString(replacement, portion, match)
      );

      if (!replacement.data) {
        return replacement;
      }

      if (!el) {
        return replacement;
      }

      el.appendChild(replacement);

      return el;
    },

    replaceMatch: function (match, startPortion, innerPortions, endPortion) {
      var matchStartNode = startPortion.node;
      var matchEndNode = endPortion.node;

      var precedingTextNode;
      var followingTextNode;

      if (matchStartNode === matchEndNode) {
        var node = matchStartNode;

        if (startPortion.indexInNode > 0) {
          // Add `before` text node (before the match)
          precedingTextNode = doc.createTextNode(
            node.data.substring(0, startPortion.indexInNode)
          );
          node.parentNode.insertBefore(precedingTextNode, node);
        }

        // Create the replacement node:
        var newNode = this.getPortionReplacementNode(endPortion, match);

        node.parentNode.insertBefore(newNode, node);

        if (endPortion.endIndexInNode < node.length) {
          // ?????
          // Add `after` text node (after the match)
          followingTextNode = doc.createTextNode(
            node.data.substring(endPortion.endIndexInNode)
          );
          node.parentNode.insertBefore(followingTextNode, node);
        }

        node.parentNode.removeChild(node);

        this.reverts.push(function () {
          if (precedingTextNode === newNode.previousSibling) {
            precedingTextNode.parentNode.removeChild(precedingTextNode);
          }
          if (followingTextNode === newNode.nextSibling) {
            followingTextNode.parentNode.removeChild(followingTextNode);
          }
          newNode.parentNode.replaceChild(node, newNode);
        });

        return newNode;
      } else {
        // Replace matchStartNode -> [innerMatchNodes...] -> matchEndNode (in that order)

        precedingTextNode = doc.createTextNode(
          matchStartNode.data.substring(0, startPortion.indexInNode)
        );

        followingTextNode = doc.createTextNode(
          matchEndNode.data.substring(endPortion.endIndexInNode)
        );

        var firstNode = this.getPortionReplacementNode(startPortion, match);

        var innerNodes = [];

        for (var i = 0, l = innerPortions.length; i < l; ++i) {
          var portion = innerPortions[i];
          var innerNode = this.getPortionReplacementNode(portion, match);
          portion.node.parentNode.replaceChild(innerNode, portion.node);
          this.reverts.push(
            (function (portion, innerNode) {
              return function () {
                innerNode.parentNode.replaceChild(portion.node, innerNode);
              };
            })(portion, innerNode)
          );
          innerNodes.push(innerNode);
        }

        var lastNode = this.getPortionReplacementNode(endPortion, match);

        matchStartNode.parentNode.insertBefore(
          precedingTextNode,
          matchStartNode
        );
        matchStartNode.parentNode.insertBefore(firstNode, matchStartNode);
        matchStartNode.parentNode.removeChild(matchStartNode);

        matchEndNode.parentNode.insertBefore(lastNode, matchEndNode);
        matchEndNode.parentNode.insertBefore(followingTextNode, matchEndNode);
        matchEndNode.parentNode.removeChild(matchEndNode);

        this.reverts.push(function () {
          precedingTextNode.parentNode.removeChild(precedingTextNode);
          firstNode.parentNode.replaceChild(matchStartNode, firstNode);
          followingTextNode.parentNode.removeChild(followingTextNode);
          lastNode.parentNode.replaceChild(matchEndNode, lastNode);
        });

        return lastNode;
      }
    },
  };

  return exposed;
});

pageChanged();


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