markdown to pdf

gistfile1.txt

// from: https://github.com/devongovett/pdfkit/issues/29#issuecomment-103121102

/**
 * Parses an input String with the help of the "marked"-package and writes the corresponding elements to the supplied document
 * @param doc - the PDFDocument to write to
 * @param input - the input String
 * @returns {object} - the document for chaining
 */
PDFDocument.parseMarkdown = function (doc, input){
  // Array of markdown parts as objects
  var markdown = marked.lexer(input);
  // loop through the Array, going over each markdown-part individually
  markdown.forEach(function(part, index){
    if(part.type === 'paragraph'){
      doc.font('Normal').fontSize(8).text(part.text, {lineGap: 1.3}).moveDown();
    }else if(part.type === 'heading'){
      var fontsize = 8;
      // depth defines if it's a h1, h2, h3 etc.
      switch(part.depth){
        case 1: fontsize = 12; break;
        case 2: fontsize = 10; break;
        default: fontsize = 8;
      }
      doc.fontSize(4).moveDown().font('Heading2').fontSize(fontsize).text(part.text).fontSize(8).moveDown();
    }else if(part.type === 'text' && markdown[index-1].type === 'list_item_start'){
      doc.font('Normal').fontSize(8).list([part.text], {lineGap: 1.3});
    }else if(part.type === 'list_end'){
      doc.fontSize(8).moveDown();
    }
  });
  return doc;
};