function convert_tree_to_html()

in assets/js/lib-markdown.js [468:603]

• 101 lines of code
• 29 McCabe index (conditional complexity)

  function convert_tree_to_html( tree, references, options ) {
    var i;
    options = options || {};

    // shallow clone
    var jsonml = tree.slice( 0 );

    if ( typeof options.preprocessTreeNode === "function" )
      jsonml = options.preprocessTreeNode(jsonml, references);

    // Clone attributes if they exist
    var attrs = extract_attr( jsonml );
    if ( attrs ) {
      jsonml[ 1 ] = {};
      for ( i in attrs ) {
        jsonml[ 1 ][ i ] = attrs[ i ];
      }
      attrs = jsonml[ 1 ];
    }

    // basic case
    if ( typeof jsonml === "string" )
      return jsonml;

    // convert this node
    switch ( jsonml[ 0 ] ) {
    case "header":
      jsonml[ 0 ] = "h" + jsonml[ 1 ].level;
      delete jsonml[ 1 ].level;
      break;
    case "bulletlist":
      jsonml[ 0 ] = "ul";
      break;
    case "numberlist":
      jsonml[ 0 ] = "ol";
      break;
    case "listitem":
      jsonml[ 0 ] = "li";
      break;
    case "para":
      jsonml[ 0 ] = "p";
      break;
    case "markdown":
      jsonml[ 0 ] = "html";
      if ( attrs )
        delete attrs.references;
      break;
    case "code_block":
      jsonml[ 0 ] = "pre";
      i = attrs ? 2 : 1;
      var code = [ "code" ];
      code.push.apply( code, jsonml.splice( i, jsonml.length - i ) );
      jsonml[ i ] = code;
      break;
    case "inlinecode":
      jsonml[ 0 ] = "code";
      break;
    case "img":
      jsonml[ 1 ].src = jsonml[ 1 ].href;
      delete jsonml[ 1 ].href;
      break;
    case "linebreak":
      jsonml[ 0 ] = "br";
      break;
    case "link":
      jsonml[ 0 ] = "a";
      break;
    case "link_ref":
      jsonml[ 0 ] = "a";

      // grab this ref and clean up the attribute node
      var ref = references[ attrs.ref ];

      // if the reference exists, make the link
      if ( ref ) {
        delete attrs.ref;

        // add in the href and title, if present
        attrs.href = ref.href;
        if ( ref.title )
          attrs.title = ref.title;

        // get rid of the unneeded original text
        delete attrs.original;
      }
      // the reference doesn't exist, so revert to plain text
      else {
        return attrs.original;
      }
      break;
    case "img_ref":
      jsonml[ 0 ] = "img";

      // grab this ref and clean up the attribute node
      var ref = references[ attrs.ref ];

      // if the reference exists, make the link
      if ( ref ) {
        delete attrs.ref;

        // add in the href and title, if present
        attrs.src = ref.href;
        if ( ref.title )
          attrs.title = ref.title;

        // get rid of the unneeded original text
        delete attrs.original;
      }
      // the reference doesn't exist, so revert to plain text
      else {
        return attrs.original;
      }
      break;
    }

    // convert all the children
    i = 1;

    // deal with the attribute node, if it exists
    if ( attrs ) {
      // if there are keys, skip over it
      for ( var key in jsonml[ 1 ] ) {
        i = 2;
        break;
      }
      // if there aren't, remove it
      if ( i === 1 )
        jsonml.splice( i, 1 );
    }

    for ( ; i < jsonml.length; ++i ) {
      jsonml[ i ] = convert_tree_to_html( jsonml[ i ], references, options );
    }

    return jsonml;
  }