third_party/WebKit/Source/devtools/front_end/ui/DOMSyntaxHighlighter.js

   1 /*
   2  * Copyright (C) 2010 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /**
  32  * @constructor
  33  * @param {string} mimeType
  34  * @param {boolean} stripExtraWhitespace
  35  */
  36 WebInspector.DOMSyntaxHighlighter = function(mimeType, stripExtraWhitespace)
  37 {
  38     this._mimeType = mimeType;
  39     this._stripExtraWhitespace = stripExtraWhitespace;
  40 }
  41
  42 WebInspector.DOMSyntaxHighlighter.prototype = {
  43     /**
  44      * @param {string} content
  45      * @param {string} className
  46      * @return {!Element}
  47      */
  48     createSpan: function(content, className)
  49     {
  50         var span = createElement("span");
  51         span.className = "cm-" + className;
  52         if (this._stripExtraWhitespace && className !== "whitespace")
  53             content = content.replace(/^[\n\r]*/, "").replace(/\s*$/, "");
  54         span.createTextChild(content);
  55         return span;
  56     },
  57
  58     /**
  59      * @param {!Element} node
  60      * @return {!Promise.<undefined>}
  61      */
  62     syntaxHighlightNode: function(node)
  63     {
  64         var lines = node.textContent.split("\n");
  65         var plainTextStart;
  66         var line;
  67
  68         return self.runtime.instancePromise(WebInspector.TokenizerFactory).then(processTokens.bind(this));
  69
  70         /**
  71          * @param {!WebInspector.TokenizerFactory} tokenizerFactory
  72          * @this {WebInspector.DOMSyntaxHighlighter}
  73          */
  74         function processTokens(tokenizerFactory)
  75         {
  76             node.removeChildren();
  77             var tokenize = tokenizerFactory.createTokenizer(this._mimeType);
  78             for (var i = lines[0].length ? 0 : 1; i < lines.length; ++i) {
  79                 line = lines[i];
  80                 plainTextStart = 0;
  81                 tokenize(line, processToken.bind(this));
  82                 if (plainTextStart < line.length) {
  83                     var plainText = line.substring(plainTextStart, line.length);
  84                     node.createTextChild(plainText);
  85                 }
  86                 if (i < lines.length - 1)
  87                     node.createTextChild("\n");
  88             }
  89         }
  90
  91         /**
  92          * @param {string} token
  93          * @param {?string} tokenType
  94          * @param {number} column
  95          * @param {number} newColumn
  96          * @this {WebInspector.DOMSyntaxHighlighter}
  97          */
  98         function processToken(token, tokenType, column, newColumn)
  99         {
 100             if (!tokenType)
 101                 return;
 102
 103             if (column > plainTextStart) {
 104                 var plainText = line.substring(plainTextStart, column);
 105                 node.createTextChild(plainText);
 106             }
 107             node.appendChild(this.createSpan(token, tokenType));
 108             plainTextStart = newColumn;
 109         }
 110     }
 111 }