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/wp-includes/js/dist/ -> autop.js (source)

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  34  /******/     
  35  /************************************************************************/
  36  var __webpack_exports__ = {};
  37  __webpack_require__.r(__webpack_exports__);
  38  /* harmony export */ __webpack_require__.d(__webpack_exports__, {
  39  /* harmony export */   "autop": function() { return /* binding */ autop; },
  40  /* harmony export */   "removep": function() { return /* binding */ removep; }
  41  /* harmony export */ });
  42  /**
  43   * The regular expression for an HTML element.
  44   *
  45   * @type {RegExp}
  46   */
  47  const htmlSplitRegex = (() => {
  48    /* eslint-disable no-multi-spaces */
  49    const comments = '!' + // Start of comment, after the <.
  50    '(?:' + // Unroll the loop: Consume everything until --> is found.
  51    '-(?!->)' + // Dash not followed by end of comment.
  52    '[^\\-]*' + // Consume non-dashes.
  53    ')*' + // Loop possessively.
  54    '(?:-->)?'; // End of comment. If not found, match all input.
  55  
  56    const cdata = '!\\[CDATA\\[' + // Start of comment, after the <.
  57    '[^\\]]*' + // Consume non-].
  58    '(?:' + // Unroll the loop: Consume everything until ]]> is found.
  59    '](?!]>)' + // One ] not followed by end of comment.
  60    '[^\\]]*' + // Consume non-].
  61    ')*?' + // Loop possessively.
  62    '(?:]]>)?'; // End of comment. If not found, match all input.
  63  
  64    const escaped = '(?=' + // Is the element escaped?
  65    '!--' + '|' + '!\\[CDATA\\[' + ')' + '((?=!-)' + // If yes, which type?
  66    comments + '|' + cdata + ')';
  67    const regex = '(' + // Capture the entire match.
  68    '<' + // Find start of element.
  69    '(' + // Conditional expression follows.
  70    escaped + // Find end of escaped element.
  71    '|' + // ... else ...
  72    '[^>]*>?' + // Find end of normal element.
  73    ')' + ')';
  74    return new RegExp(regex);
  75    /* eslint-enable no-multi-spaces */
  76  })();
  77  /**
  78   * Separate HTML elements and comments from the text.
  79   *
  80   * @param {string} input The text which has to be formatted.
  81   *
  82   * @return {string[]} The formatted text.
  83   */
  84  
  85  
  86  function htmlSplit(input) {
  87    const parts = [];
  88    let workingInput = input;
  89    let match;
  90  
  91    while (match = workingInput.match(htmlSplitRegex)) {
  92      // The `match` result, when invoked on a RegExp with the `g` flag (`/foo/g`) will not include `index`.
  93      // If the `g` flag is omitted, `index` is included.
  94      // `htmlSplitRegex` does not have the `g` flag so we can assert it will have an index number.
  95      // Assert `match.index` is a number.
  96      const index =
  97      /** @type {number} */
  98      match.index;
  99      parts.push(workingInput.slice(0, index));
 100      parts.push(match[0]);
 101      workingInput = workingInput.slice(index + match[0].length);
 102    }
 103  
 104    if (workingInput.length) {
 105      parts.push(workingInput);
 106    }
 107  
 108    return parts;
 109  }
 110  /**
 111   * Replace characters or phrases within HTML elements only.
 112   *
 113   * @param {string}                haystack     The text which has to be formatted.
 114   * @param {Record<string,string>} replacePairs In the form {from: 'to', …}.
 115   *
 116   * @return {string} The formatted text.
 117   */
 118  
 119  
 120  function replaceInHtmlTags(haystack, replacePairs) {
 121    // Find all elements.
 122    const textArr = htmlSplit(haystack);
 123    let changed = false; // Extract all needles.
 124  
 125    const needles = Object.keys(replacePairs); // Loop through delimiters (elements) only.
 126  
 127    for (let i = 1; i < textArr.length; i += 2) {
 128      for (let j = 0; j < needles.length; j++) {
 129        const needle = needles[j];
 130  
 131        if (-1 !== textArr[i].indexOf(needle)) {
 132          textArr[i] = textArr[i].replace(new RegExp(needle, 'g'), replacePairs[needle]);
 133          changed = true; // After one strtr() break out of the foreach loop and look at next element.
 134  
 135          break;
 136        }
 137      }
 138    }
 139  
 140    if (changed) {
 141      haystack = textArr.join('');
 142    }
 143  
 144    return haystack;
 145  }
 146  /**
 147   * Replaces double line-breaks with paragraph elements.
 148   *
 149   * A group of regex replaces used to identify text formatted with newlines and
 150   * replace double line-breaks with HTML paragraph tags. The remaining line-
 151   * breaks after conversion become `<br />` tags, unless br is set to 'false'.
 152   *
 153   * @param {string}  text The text which has to be formatted.
 154   * @param {boolean} br   Optional. If set, will convert all remaining line-
 155   *                       breaks after paragraphing. Default true.
 156   *
 157   * @example
 158   *```js
 159   * import { autop } from '@wordpress/autop';
 160   * autop( 'my text' ); // "<p>my text</p>"
 161   * ```
 162   *
 163   * @return {string} Text which has been converted into paragraph tags.
 164   */
 165  
 166  
 167  function autop(text) {
 168    let br = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
 169    const preTags = [];
 170  
 171    if (text.trim() === '') {
 172      return '';
 173    } // Just to make things a little easier, pad the end.
 174  
 175  
 176    text = text + '\n';
 177    /*
 178     * Pre tags shouldn't be touched by autop.
 179     * Replace pre tags with placeholders and bring them back after autop.
 180     */
 181  
 182    if (text.indexOf('<pre') !== -1) {
 183      const textParts = text.split('</pre>');
 184      const lastText = textParts.pop();
 185      text = '';
 186  
 187      for (let i = 0; i < textParts.length; i++) {
 188        const textPart = textParts[i];
 189        const start = textPart.indexOf('<pre'); // Malformed html?
 190  
 191        if (start === -1) {
 192          text += textPart;
 193          continue;
 194        }
 195  
 196        const name = '<pre wp-pre-tag-' + i + '></pre>';
 197        preTags.push([name, textPart.substr(start) + '</pre>']);
 198        text += textPart.substr(0, start) + name;
 199      }
 200  
 201      text += lastText;
 202    } // Change multiple <br>s into two line breaks, which will turn into paragraphs.
 203  
 204  
 205    text = text.replace(/<br\s*\/?>\s*<br\s*\/?>/g, '\n\n');
 206    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.
 207  
 208    text = text.replace(new RegExp('(<' + allBlocks + '[\\s/>])', 'g'), '\n\n$1'); // Add a double line break below block-level closing tags.
 209  
 210    text = text.replace(new RegExp('(</' + allBlocks + '>)', 'g'), '$1\n\n'); // Standardize newline characters to "\n".
 211  
 212    text = text.replace(/\r\n|\r/g, '\n'); // Find newlines in all elements and add placeholders.
 213  
 214    text = replaceInHtmlTags(text, {
 215      '\n': ' <!-- wpnl --> '
 216    }); // Collapse line breaks before and after <option> elements so they don't get autop'd.
 217  
 218    if (text.indexOf('<option') !== -1) {
 219      text = text.replace(/\s*<option/g, '<option');
 220      text = text.replace(/<\/option>\s*/g, '</option>');
 221    }
 222    /*
 223     * Collapse line breaks inside <object> elements, before <param> and <embed> elements
 224     * so they don't get autop'd.
 225     */
 226  
 227  
 228    if (text.indexOf('</object>') !== -1) {
 229      text = text.replace(/(<object[^>]*>)\s*/g, '$1');
 230      text = text.replace(/\s*<\/object>/g, '</object>');
 231      text = text.replace(/\s*(<\/?(?:param|embed)[^>]*>)\s*/g, '$1');
 232    }
 233    /*
 234     * Collapse line breaks inside <audio> and <video> elements,
 235     * before and after <source> and <track> elements.
 236     */
 237  
 238  
 239    if (text.indexOf('<source') !== -1 || text.indexOf('<track') !== -1) {
 240      text = text.replace(/([<\[](?:audio|video)[^>\]]*[>\]])\s*/g, '$1');
 241      text = text.replace(/\s*([<\[]\/(?:audio|video)[>\]])/g, '$1');
 242      text = text.replace(/\s*(<(?:source|track)[^>]*>)\s*/g, '$1');
 243    } // Collapse line breaks before and after <figcaption> elements.
 244  
 245  
 246    if (text.indexOf('<figcaption') !== -1) {
 247      text = text.replace(/\s*(<figcaption[^>]*>)/, '$1');
 248      text = text.replace(/<\/figcaption>\s*/, '</figcaption>');
 249    } // Remove more than two contiguous line breaks.
 250  
 251  
 252    text = text.replace(/\n\n+/g, '\n\n'); // Split up the contents into an array of strings, separated by double line breaks.
 253  
 254    const texts = text.split(/\n\s*\n/).filter(Boolean); // Reset text prior to rebuilding.
 255  
 256    text = ''; // Rebuild the content as a string, wrapping every bit with a <p>.
 257  
 258    texts.forEach(textPiece => {
 259      text += '<p>' + textPiece.replace(/^\n*|\n*$/g, '') + '</p>\n';
 260    }); // Under certain strange conditions it could create a P of entirely whitespace.
 261  
 262    text = text.replace(/<p>\s*<\/p>/g, ''); // Add a closing <p> inside <div>, <address>, or <form> tag if missing.
 263  
 264    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.
 265  
 266    text = text.replace(new RegExp('<p>\\s*(</?' + allBlocks + '[^>]*>)\\s*</p>', 'g'), '$1'); // In some cases <li> may get wrapped in <p>, fix them.
 267  
 268    text = text.replace(/<p>(<li.+?)<\/p>/g, '$1'); // If a <blockquote> is wrapped with a <p>, move it inside the <blockquote>.
 269  
 270    text = text.replace(/<p><blockquote([^>]*)>/gi, '<blockquote$1><p>');
 271    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.
 272  
 273    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.
 274  
 275    text = text.replace(new RegExp('(</?' + allBlocks + '[^>]*>)\\s*</p>', 'g'), '$1'); // Optionally insert line breaks.
 276  
 277    if (br) {
 278      // Replace newlines that shouldn't be touched with a placeholder.
 279      text = text.replace(/<(script|style).*?<\/\\1>/g, match => match[0].replace(/\n/g, '<WPPreserveNewline />')); // Normalize <br>
 280  
 281      text = text.replace(/<br>|<br\/>/g, '<br />'); // Replace any new line characters that aren't preceded by a <br /> with a <br />.
 282  
 283      text = text.replace(/(<br \/>)?\s*\n/g, (a, b) => b ? a : '<br />\n'); // Replace newline placeholders with newlines.
 284  
 285      text = text.replace(/<WPPreserveNewline \/>/g, '\n');
 286    } // If a <br /> tag is after an opening or closing block tag, remove it.
 287  
 288  
 289    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.
 290  
 291    text = text.replace(/<br \/>(\s*<\/?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)/g, '$1');
 292    text = text.replace(/\n<\/p>$/g, '</p>'); // Replace placeholder <pre> tags with their original content.
 293  
 294    preTags.forEach(preTag => {
 295      const [name, original] = preTag;
 296      text = text.replace(name, original);
 297    }); // Restore newlines in all elements.
 298  
 299    if (-1 !== text.indexOf('<!-- wpnl -->')) {
 300      text = text.replace(/\s?<!-- wpnl -->\s?/g, '\n');
 301    }
 302  
 303    return text;
 304  }
 305  /**
 306   * Replaces `<p>` tags with two line breaks. "Opposite" of autop().
 307   *
 308   * Replaces `<p>` tags with two line breaks except where the `<p>` has attributes.
 309   * Unifies whitespace. Indents `<li>`, `<dt>` and `<dd>` for better readability.
 310   *
 311   * @param {string} html The content from the editor.
 312   *
 313   * @example
 314   * ```js
 315   * import { removep } from '@wordpress/autop';
 316   * removep( '<p>my text</p>' ); // "my text"
 317   * ```
 318   *
 319   * @return {string} The content with stripped paragraph tags.
 320   */
 321  
 322  function removep(html) {
 323    const blocklist = 'blockquote|ul|ol|li|dl|dt|dd|table|thead|tbody|tfoot|tr|th|td|h[1-6]|fieldset|figure';
 324    const blocklist1 = blocklist + '|div|p';
 325    const blocklist2 = blocklist + '|pre';
 326    /** @type {string[]} */
 327  
 328    const preserve = [];
 329    let preserveLinebreaks = false;
 330    let preserveBr = false;
 331  
 332    if (!html) {
 333      return '';
 334    } // Protect script and style tags.
 335  
 336  
 337    if (html.indexOf('<script') !== -1 || html.indexOf('<style') !== -1) {
 338      html = html.replace(/<(script|style)[^>]*>[\s\S]*?<\/\1>/g, match => {
 339        preserve.push(match);
 340        return '<wp-preserve>';
 341      });
 342    } // Protect pre tags.
 343  
 344  
 345    if (html.indexOf('<pre') !== -1) {
 346      preserveLinebreaks = true;
 347      html = html.replace(/<pre[^>]*>[\s\S]+?<\/pre>/g, a => {
 348        a = a.replace(/<br ?\/?>(\r\n|\n)?/g, '<wp-line-break>');
 349        a = a.replace(/<\/?p( [^>]*)?>(\r\n|\n)?/g, '<wp-line-break>');
 350        return a.replace(/\r?\n/g, '<wp-line-break>');
 351      });
 352    } // Remove line breaks but keep <br> tags inside image captions.
 353  
 354  
 355    if (html.indexOf('[caption') !== -1) {
 356      preserveBr = true;
 357      html = html.replace(/\[caption[\s\S]+?\[\/caption\]/g, a => {
 358        return a.replace(/<br([^>]*)>/g, '<wp-temp-br$1>').replace(/[\r\n\t]+/, '');
 359      });
 360    } // Normalize white space characters before and after block tags.
 361  
 362  
 363    html = html.replace(new RegExp('\\s*</(' + blocklist1 + ')>\\s*', 'g'), '</$1>\n');
 364    html = html.replace(new RegExp('\\s*<((?:' + blocklist1 + ')(?: [^>]*)?)>', 'g'), '\n<$1>'); // Mark </p> if it has any attributes.
 365  
 366    html = html.replace(/(<p [^>]+>[\s\S]*?)<\/p>/g, '$1</p#>'); // Preserve the first <p> inside a <div>.
 367  
 368    html = html.replace(/<div( [^>]*)?>\s*<p>/gi, '<div$1>\n\n'); // Remove paragraph tags.
 369  
 370    html = html.replace(/\s*<p>/gi, '');
 371    html = html.replace(/\s*<\/p>\s*/gi, '\n\n'); // Normalize white space chars and remove multiple line breaks.
 372  
 373    html = html.replace(/\n[\s\u00a0]+\n/g, '\n\n'); // Replace <br> tags with line breaks.
 374  
 375    html = html.replace(/(\s*)<br ?\/?>\s*/gi, (_, space) => {
 376      if (space && space.indexOf('\n') !== -1) {
 377        return '\n\n';
 378      }
 379  
 380      return '\n';
 381    }); // Fix line breaks around <div>.
 382  
 383    html = html.replace(/\s*<div/g, '\n<div');
 384    html = html.replace(/<\/div>\s*/g, '</div>\n'); // Fix line breaks around caption shortcodes.
 385  
 386    html = html.replace(/\s*\[caption([^\[]+)\[\/caption\]\s*/gi, '\n\n[caption$1[/caption]\n\n');
 387    html = html.replace(/caption\]\n\n+\[caption/g, 'caption]\n\n[caption'); // Pad block elements tags with a line break.
 388  
 389    html = html.replace(new RegExp('\\s*<((?:' + blocklist2 + ')(?: [^>]*)?)\\s*>', 'g'), '\n<$1>');
 390    html = html.replace(new RegExp('\\s*</(' + blocklist2 + ')>\\s*', 'g'), '</$1>\n'); // Indent <li>, <dt> and <dd> tags.
 391  
 392    html = html.replace(/<((li|dt|dd)[^>]*)>/g, ' \t<$1>'); // Fix line breaks around <select> and <option>.
 393  
 394    if (html.indexOf('<option') !== -1) {
 395      html = html.replace(/\s*<option/g, '\n<option');
 396      html = html.replace(/\s*<\/select>/g, '\n</select>');
 397    } // Pad <hr> with two line breaks.
 398  
 399  
 400    if (html.indexOf('<hr') !== -1) {
 401      html = html.replace(/\s*<hr( [^>]*)?>\s*/g, '\n\n<hr$1>\n\n');
 402    } // Remove line breaks in <object> tags.
 403  
 404  
 405    if (html.indexOf('<object') !== -1) {
 406      html = html.replace(/<object[\s\S]+?<\/object>/g, a => {
 407        return a.replace(/[\r\n]+/g, '');
 408      });
 409    } // Unmark special paragraph closing tags.
 410  
 411  
 412    html = html.replace(/<\/p#>/g, '</p>\n'); // Pad remaining <p> tags whit a line break.
 413  
 414    html = html.replace(/\s*(<p [^>]+>[\s\S]*?<\/p>)/g, '\n$1'); // Trim.
 415  
 416    html = html.replace(/^\s+/, '');
 417    html = html.replace(/[\s\u00a0]+$/, '');
 418  
 419    if (preserveLinebreaks) {
 420      html = html.replace(/<wp-line-break>/g, '\n');
 421    }
 422  
 423    if (preserveBr) {
 424      html = html.replace(/<wp-temp-br([^>]*)>/g, '<br$1>');
 425    } // Restore preserved tags.
 426  
 427  
 428    if (preserve.length) {
 429      html = html.replace(/<wp-preserve>/g, () => {
 430        return (
 431          /** @type {string} */
 432          preserve.shift()
 433        );
 434      });
 435    }
 436  
 437    return html;
 438  }
 439  
 440  (window.wp = window.wp || {}).autop = __webpack_exports__;
 441  /******/ })()
 442  ;


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