Function _HashHTMLBlocks

public/libs/showdown.js:307–429

(text)

var _HashHTMLBlocks = function(text) {
  // attacklab: Double up blank lines to reduce lookaround
  text = text.replace(/\n/g,"\n\n");

  // Hashify HTML blocks:
  // We only want to do this for block-level HTML tags, such as headers,
  // lists, and tables. That's because we still want to wrap <p>s around
  // "paragraphs" that are wrapped in non-block-level tags, such as anchors,
  // phrase emphasis, and spans. The list of tags we're looking for is
  // hard-coded:
  var block_tags_a = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del"
  var block_tags_b = "p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math"

  // First, look for nested blocks, e.g.:
  //   <div>
  //     <div>
  //     tags for inner block must be indented.
  //     </div>
  //   </div>
  //
  // The outermost tags must start at the left margin for this to match, and
  // the inner nested divs must be indented.
  // We need to do this before the next, more liberal match, because the next
  // match will start at the first `<div>` and stop at the first `</div>`.

  // attacklab: This regex can be expensive when it fails.
  /*
    var text = text.replace(/
    (           // save in $1
      ^         // start of line  (with /m)
      <($block_tags_a)  // start tag = $2
      \b          // word break
                // attacklab: hack around khtml/pcre bug...
      [^\r]*?\n     // any number of lines, minimally matching
      </\2>       // the matching end tag
      [ \t]*        // trailing spaces/tabs
      (?=\n+)       // followed by a newline
    )           // attacklab: there are sentinel newlines at end of document
    /gm,function(){...}};
  */
  text = text.replace(/^(<(p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|script|noscript|form|fieldset|iframe|math|ins|del)\b[^\r]*?\n<\/\2>[ \t]*(?=\n+))/gm,hashElement);
  
  //
  // Now match more liberally, simply from `\n<tag>` to `</tag>\n`
  //

  /*
    var text = text.replace(/
    (           // save in $1
      ^         // start of line  (with /m)
      <($block_tags_b)  // start tag = $2
      \b          // word break
                // attacklab: hack around khtml/pcre bug...
      [^\r]*?       // any number of lines, minimally matching
      .*</\2>       // the matching end tag
      [ \t]*        // trailing spaces/tabs
      (?=\n+)       // followed by a newline
    )           // attacklab: there are sentinel newlines at end of document