showdown/src/subParsers/paragraphs.js

/**
 *
 */
showdown.subParser('paragraphs', function (text, options, globals) {
  'use strict';

  text = globals.converter._dispatch('paragraphs.before', text, options);
  // Strip leading and trailing lines:
  text = text.replace(/^\n+/g, '');
  text = text.replace(/\n+$/g, '');

  var grafs = text.split(/\n{2,}/g),
      grafsOut = [],
      end = grafs.length; // Wrap <p> tags

  for (var i = 0; i < end; i++) {
    var str = grafs[i];

    // if this is an HTML marker, copy it
    if (str.search(/~K(\d+)K/g) >= 0) {
      grafsOut.push(str);
    } else if (str.search(/\S/) >= 0) {
      str = showdown.subParser('spanGamut')(str, options, globals);
      str = str.replace(/^([ \t]*)/g, '<p>');
      str += '</p>';
      grafsOut.push(str);
    }
  }

  /** Unhashify HTML blocks */
  end = grafsOut.length;
  for (i = 0; i < end; i++) {
    var blockText = '';
    // if this is a marker for an html block...
    while (grafsOut[i].search(/~K(\d+)K/) >= 0) {
      blockText = globals.gHtmlBlocks[RegExp.$1];
      blockText = blockText.replace(/\$/g, '$$$$'); // Escape any dollar signs
      grafsOut[i] = grafsOut[i].replace(/~K\d+K/, blockText);
    }
  }

  text = globals.converter._dispatch('paragraphs.after', text, options);
  return grafsOut.join('\n\n');
});