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      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 = document.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      */
     61     syntaxHighlightNode: function(node)
     62     {
     63         var lines = node.textContent.split("\n");
     64         node.removeChildren();
     65 
     66         /**
     67          * @param {string} token
     68          * @param {?string} tokenType
     69          * @param {number} column
     70          * @param {number} newColumn
     71          * @this {WebInspector.DOMSyntaxHighlighter}
     72          */
     73         function processToken(token, tokenType, column, newColumn)
     74         {
     75             if (!tokenType)
     76                 return;
     77 
     78             if (column > plainTextStart) {
     79                 var plainText = line.substring(plainTextStart, column);
     80                 node.createTextChild(plainText);
     81             }
     82             node.appendChild(this.createSpan(token, tokenType));
     83             plainTextStart = newColumn;
     84         }
     85 
     86         var tokenize = self.runtime.instance(WebInspector.TokenizerFactory).createTokenizer(this._mimeType);
     87         for (var i = lines[0].length ? 0 : 1; i < lines.length; ++i) {
     88             var line = lines[i];
     89             var plainTextStart = 0;
     90             tokenize(line, processToken.bind(this));
     91             if (plainTextStart < line.length) {
     92                 var plainText = line.substring(plainTextStart, line.length);
     93                 node.createTextChild(plainText);
     94             }
     95             if (i < lines.length - 1)
     96                 node.createChild("br");
     97         }
     98     }
     99 }
    100