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Filename : autop.js
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/************************************************************************/
var __webpack_exports__ = {};
__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   autop: () => (/* binding */ autop),
/* harmony export */   removep: () => (/* binding */ removep)
/* harmony export */ });
/**
 * The regular expression for an HTML element.
 *
 * @type {RegExp}
 */
const htmlSplitRegex = (() => {
  /* eslint-disable no-multi-spaces */
  const comments = '!' +
  // Start of comment, after the <.
  '(?:' +
  // Unroll the loop: Consume everything until --> is found.
  '-(?!->)' +
  // Dash not followed by end of comment.
  '[^\\-]*' +
  // Consume non-dashes.
  ')*' +
  // Loop possessively.
  '(?:-->)?'; // End of comment. If not found, match all input.

  const cdata = '!\\[CDATA\\[' +
  // Start of comment, after the <.
  '[^\\]]*' +
  // Consume non-].
  '(?:' +
  // Unroll the loop: Consume everything until ]]> is found.
  '](?!]>)' +
  // One ] not followed by end of comment.
  '[^\\]]*' +
  // Consume non-].
  ')*?' +
  // Loop possessively.
  '(?:]]>)?'; // End of comment. If not found, match all input.

  const escaped = '(?=' +
  // Is the element escaped?
  '!--' + '|' + '!\\[CDATA\\[' + ')' + '((?=!-)' +
  // If yes, which type?
  comments + '|' + cdata + ')';
  const regex = '(' +
  // Capture the entire match.
  '<' +
  // Find start of element.
  '(' +
  // Conditional expression follows.
  escaped +
  // Find end of escaped element.
  '|' +
  // ... else ...
  '[^>]*>?' +
  // Find end of normal element.
  ')' + ')';
  return new RegExp(regex);
  /* eslint-enable no-multi-spaces */
})();

/**
 * Separate HTML elements and comments from the text.
 *
 * @param {string} input The text which has to be formatted.
 *
 * @return {string[]} The formatted text.
 */
function htmlSplit(input) {
  const parts = [];
  let workingInput = input;
  let match;
  while (match = workingInput.match(htmlSplitRegex)) {
    // The `match` result, when invoked on a RegExp with the `g` flag (`/foo/g`) will not include `index`.
    // If the `g` flag is omitted, `index` is included.
    // `htmlSplitRegex` does not have the `g` flag so we can assert it will have an index number.
    // Assert `match.index` is a number.
    const index = /** @type {number} */match.index;
    parts.push(workingInput.slice(0, index));
    parts.push(match[0]);
    workingInput = workingInput.slice(index + match[0].length);
  }
  if (workingInput.length) {
    parts.push(workingInput);
  }
  return parts;
}

/**
 * Replace characters or phrases within HTML elements only.
 *
 * @param {string}                haystack     The text which has to be formatted.
 * @param {Record<string,string>} replacePairs In the form {from: 'to', …}.
 *
 * @return {string} The formatted text.
 */
function replaceInHtmlTags(haystack, replacePairs) {
  // Find all elements.
  const textArr = htmlSplit(haystack);
  let changed = false;

  // Extract all needles.
  const needles = Object.keys(replacePairs);

  // Loop through delimiters (elements) only.
  for (let i = 1; i < textArr.length; i += 2) {
    for (let j = 0; j < needles.length; j++) {
      const needle = needles[j];
      if (-1 !== textArr[i].indexOf(needle)) {
        textArr[i] = textArr[i].replace(new RegExp(needle, 'g'), replacePairs[needle]);
        changed = true;
        // After one strtr() break out of the foreach loop and look at next element.
        break;
      }
    }
  }
  if (changed) {
    haystack = textArr.join('');
  }
  return haystack;
}

/**
 * Replaces double line-breaks with paragraph elements.
 *
 * A group of regex replaces used to identify text formatted with newlines and
 * replace double line-breaks with HTML paragraph tags. The remaining line-
 * breaks after conversion become `<br />` tags, unless br is set to 'false'.
 *
 * @param {string}  text The text which has to be formatted.
 * @param {boolean} br   Optional. If set, will convert all remaining line-
 *                       breaks after paragraphing. Default true.
 *
 * @example
 *```js
 * import { autop } from '@wordpress/autop';
 * autop( 'my text' ); // "<p>my text</p>"
 * ```
 *
 * @return {string} Text which has been converted into paragraph tags.
 */
function autop(text, br = true) {
  const preTags = [];
  if (text.trim() === '') {
    return '';
  }

  // Just to make things a little easier, pad the end.
  text = text + '\n';

  /*
   * Pre tags shouldn't be touched by autop.
   * Replace pre tags with placeholders and bring them back after autop.
   */
  if (text.indexOf('<pre') !== -1) {
    const textParts = text.split('</pre>');
    const lastText = textParts.pop();
    text = '';
    for (let i = 0; i < textParts.length; i++) {
      const textPart = textParts[i];
      const start = textPart.indexOf('<pre');

      // Malformed html?
      if (start === -1) {
        text += textPart;
        continue;
      }
      const name = '<pre wp-pre-tag-' + i + '></pre>';
      preTags.push([name, textPart.substr(start) + '</pre>']);
      text += textPart.substr(0, start) + name;
    }
    text += lastText;
  }
  // Change multiple <br>s into two line breaks, which will turn into paragraphs.
  text = text.replace(/<br\s*\/?>\s*<br\s*\/?>/g, '\n\n');
  const allBlocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';

  // Add a double line break above block-level opening tags.
  text = text.replace(new RegExp('(<' + allBlocks + '[\\s/>])', 'g'), '\n\n$1');

  // Add a double line break below block-level closing tags.
  text = text.replace(new RegExp('(</' + allBlocks + '>)', 'g'), '$1\n\n');

  // Standardize newline characters to "\n".
  text = text.replace(/\r\n|\r/g, '\n');

  // Find newlines in all elements and add placeholders.
  text = replaceInHtmlTags(text, {
    '\n': ' <!-- wpnl --> '
  });

  // Collapse line breaks before and after <option> elements so they don't get autop'd.
  if (text.indexOf('<option') !== -1) {
    text = text.replace(/\s*<option/g, '<option');
    text = text.replace(/<\/option>\s*/g, '</option>');
  }

  /*
   * Collapse line breaks inside <object> elements, before <param> and <embed> elements
   * so they don't get autop'd.
   */
  if (text.indexOf('</object>') !== -1) {
    text = text.replace(/(<object[^>]*>)\s*/g, '$1');
    text = text.replace(/\s*<\/object>/g, '</object>');
    text = text.replace(/\s*(<\/?(?:param|embed)[^>]*>)\s*/g, '$1');
  }

  /*
   * Collapse line breaks inside <audio> and <video> elements,
   * before and after <source> and <track> elements.
   */
  if (text.indexOf('<source') !== -1 || text.indexOf('<track') !== -1) {
    text = text.replace(/([<\[](?:audio|video)[^>\]]*[>\]])\s*/g, '$1');
    text = text.replace(/\s*([<\[]\/(?:audio|video)[>\]])/g, '$1');
    text = text.replace(/\s*(<(?:source|track)[^>]*>)\s*/g, '$1');
  }

  // Collapse line breaks before and after <figcaption> elements.
  if (text.indexOf('<figcaption') !== -1) {
    text = text.replace(/\s*(<figcaption[^>]*>)/, '$1');
    text = text.replace(/<\/figcaption>\s*/, '</figcaption>');
  }

  // Remove more than two contiguous line breaks.
  text = text.replace(/\n\n+/g, '\n\n');

  // Split up the contents into an array of strings, separated by double line breaks.
  const texts = text.split(/\n\s*\n/).filter(Boolean);

  // Reset text prior to rebuilding.
  text = '';

  // Rebuild the content as a string, wrapping every bit with a <p>.
  texts.forEach(textPiece => {
    text += '<p>' + textPiece.replace(/^\n*|\n*$/g, '') + '</p>\n';
  });

  // Under certain strange conditions it could create a P of entirely whitespace.
  text = text.replace(/<p>\s*<\/p>/g, '');

  // Add a closing <p> inside <div>, <address>, or <form> tag if missing.
  text = text.replace(/<p>([^<]+)<\/(div|address|form)>/g, '<p>$1</p></$2>');

  // If an opening or closing block element tag is wrapped in a <p>, unwrap it.
  text = text.replace(new RegExp('<p>\\s*(</?' + allBlocks + '[^>]*>)\\s*</p>', 'g'), '$1');

  // In some cases <li> may get wrapped in <p>, fix them.
  text = text.replace(/<p>(<li.+?)<\/p>/g, '$1');

  // If a <blockquote> is wrapped with a <p>, move it inside the <blockquote>.
  text = text.replace(/<p><blockquote([^>]*)>/gi, '<blockquote$1><p>');
  text = text.replace(/<\/blockquote><\/p>/g, '</p></blockquote>');

  // If an opening or closing block element tag is preceded by an opening <p> tag, remove it.
  text = text.replace(new RegExp('<p>\\s*(</?' + allBlocks + '[^>]*>)', 'g'), '$1');

  // If an opening or closing block element tag is followed by a closing <p> tag, remove it.
  text = text.replace(new RegExp('(</?' + allBlocks + '[^>]*>)\\s*</p>', 'g'), '$1');

  // Optionally insert line breaks.
  if (br) {
    // Replace newlines that shouldn't be touched with a placeholder.
    text = text.replace(/<(script|style).*?<\/\\1>/g, match => match[0].replace(/\n/g, '<WPPreserveNewline />'));

    // Normalize <br>
    text = text.replace(/<br>|<br\/>/g, '<br />');

    // Replace any new line characters that aren't preceded by a <br /> with a <br />.
    text = text.replace(/(<br \/>)?\s*\n/g, (a, b) => b ? a : '<br />\n');

    // Replace newline placeholders with newlines.
    text = text.replace(/<WPPreserveNewline \/>/g, '\n');
  }

  // If a <br /> tag is after an opening or closing block tag, remove it.
  text = text.replace(new RegExp('(</?' + allBlocks + '[^>]*>)\\s*<br />', 'g'), '$1');

  // If a <br /> tag is before a subset of opening or closing block tags, remove it.
  text = text.replace(/<br \/>(\s*<\/?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)/g, '$1');
  text = text.replace(/\n<\/p>$/g, '</p>');

  // Replace placeholder <pre> tags with their original content.
  preTags.forEach(preTag => {
    const [name, original] = preTag;
    text = text.replace(name, original);
  });

  // Restore newlines in all elements.
  if (-1 !== text.indexOf('<!-- wpnl -->')) {
    text = text.replace(/\s?<!-- wpnl -->\s?/g, '\n');
  }
  return text;
}

/**
 * Replaces `<p>` tags with two line breaks. "Opposite" of autop().
 *
 * Replaces `<p>` tags with two line breaks except where the `<p>` has attributes.
 * Unifies whitespace. Indents `<li>`, `<dt>` and `<dd>` for better readability.
 *
 * @param {string} html The content from the editor.
 *
 * @example
 * ```js
 * import { removep } from '@wordpress/autop';
 * removep( '<p>my text</p>' ); // "my text"
 * ```
 *
 * @return {string} The content with stripped paragraph tags.
 */
function removep(html) {
  const blocklist = 'blockquote|ul|ol|li|dl|dt|dd|table|thead|tbody|tfoot|tr|th|td|h[1-6]|fieldset|figure';
  const blocklist1 = blocklist + '|div|p';
  const blocklist2 = blocklist + '|pre';
  /** @type {string[]} */
  const preserve = [];
  let preserveLinebreaks = false;
  let preserveBr = false;
  if (!html) {
    return '';
  }

  // Protect script and style tags.
  if (html.indexOf('<script') !== -1 || html.indexOf('<style') !== -1) {
    html = html.replace(/<(script|style)[^>]*>[\s\S]*?<\/\1>/g, match => {
      preserve.push(match);
      return '<wp-preserve>';
    });
  }

  // Protect pre tags.
  if (html.indexOf('<pre') !== -1) {
    preserveLinebreaks = true;
    html = html.replace(/<pre[^>]*>[\s\S]+?<\/pre>/g, a => {
      a = a.replace(/<br ?\/?>(\r\n|\n)?/g, '<wp-line-break>');
      a = a.replace(/<\/?p( [^>]*)?>(\r\n|\n)?/g, '<wp-line-break>');
      return a.replace(/\r?\n/g, '<wp-line-break>');
    });
  }

  // Remove line breaks but keep <br> tags inside image captions.
  if (html.indexOf('[caption') !== -1) {
    preserveBr = true;
    html = html.replace(/\[caption[\s\S]+?\[\/caption\]/g, a => {
      return a.replace(/<br([^>]*)>/g, '<wp-temp-br$1>').replace(/[\r\n\t]+/, '');
    });
  }

  // Normalize white space characters before and after block tags.
  html = html.replace(new RegExp('\\s*</(' + blocklist1 + ')>\\s*', 'g'), '</$1>\n');
  html = html.replace(new RegExp('\\s*<((?:' + blocklist1 + ')(?: [^>]*)?)>', 'g'), '\n<$1>');

  // Mark </p> if it has any attributes.
  html = html.replace(/(<p [^>]+>[\s\S]*?)<\/p>/g, '$1</p#>');

  // Preserve the first <p> inside a <div>.
  html = html.replace(/<div( [^>]*)?>\s*<p>/gi, '<div$1>\n\n');

  // Remove paragraph tags.
  html = html.replace(/\s*<p>/gi, '');
  html = html.replace(/\s*<\/p>\s*/gi, '\n\n');

  // Normalize white space chars and remove multiple line breaks.
  html = html.replace(/\n[\s\u00a0]+\n/g, '\n\n');

  // Replace <br> tags with line breaks.
  html = html.replace(/(\s*)<br ?\/?>\s*/gi, (_, space) => {
    if (space && space.indexOf('\n') !== -1) {
      return '\n\n';
    }
    return '\n';
  });

  // Fix line breaks around <div>.
  html = html.replace(/\s*<div/g, '\n<div');
  html = html.replace(/<\/div>\s*/g, '</div>\n');

  // Fix line breaks around caption shortcodes.
  html = html.replace(/\s*\[caption([^\[]+)\[\/caption\]\s*/gi, '\n\n[caption$1[/caption]\n\n');
  html = html.replace(/caption\]\n\n+\[caption/g, 'caption]\n\n[caption');

  // Pad block elements tags with a line break.
  html = html.replace(new RegExp('\\s*<((?:' + blocklist2 + ')(?: [^>]*)?)\\s*>', 'g'), '\n<$1>');
  html = html.replace(new RegExp('\\s*</(' + blocklist2 + ')>\\s*', 'g'), '</$1>\n');

  // Indent <li>, <dt> and <dd> tags.
  html = html.replace(/<((li|dt|dd)[^>]*)>/g, ' \t<$1>');

  // Fix line breaks around <select> and <option>.
  if (html.indexOf('<option') !== -1) {
    html = html.replace(/\s*<option/g, '\n<option');
    html = html.replace(/\s*<\/select>/g, '\n</select>');
  }

  // Pad <hr> with two line breaks.
  if (html.indexOf('<hr') !== -1) {
    html = html.replace(/\s*<hr( [^>]*)?>\s*/g, '\n\n<hr$1>\n\n');
  }

  // Remove line breaks in <object> tags.
  if (html.indexOf('<object') !== -1) {
    html = html.replace(/<object[\s\S]+?<\/object>/g, a => {
      return a.replace(/[\r\n]+/g, '');
    });
  }

  // Unmark special paragraph closing tags.
  html = html.replace(/<\/p#>/g, '</p>\n');

  // Pad remaining <p> tags whit a line break.
  html = html.replace(/\s*(<p [^>]+>[\s\S]*?<\/p>)/g, '\n$1');

  // Trim.
  html = html.replace(/^\s+/, '');
  html = html.replace(/[\s\u00a0]+$/, '');
  if (preserveLinebreaks) {
    html = html.replace(/<wp-line-break>/g, '\n');
  }
  if (preserveBr) {
    html = html.replace(/<wp-temp-br([^>]*)>/g, '<br$1>');
  }

  // Restore preserved tags.
  if (preserve.length) {
    html = html.replace(/<wp-preserve>/g, () => {
      return /** @type {string} */preserve.shift();
    });
  }
  return html;
}

(window.wp = window.wp || {}).autop = __webpack_exports__;
/******/ })()
;