Source/WebCore/inspector/front-end/DOMSyntaxHighlighter.js

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @constructor
 */
WebInspector.DOMSyntaxHighlighter = function(mimeType, stripExtraWhitespace)
{
    this._tokenizer = WebInspector.SourceTokenizer.Registry.getInstance().getTokenizer(mimeType);
    this._stripExtraWhitespace = stripExtraWhitespace;
}

WebInspector.DOMSyntaxHighlighter.prototype = {
    createSpan: function(content, className)
    {
        var span = document.createElement("span");
        span.className = "webkit-" + className;
        if (this._stripExtraWhitespace)
            content = content.replace(/^[\n\r]*/, "").replace(/\s*$/, "");
        span.appendChild(document.createTextNode(content));
        return span;
    },

    syntaxHighlightNode: function(node)
    {
        this._tokenizer.condition = this._tokenizer.createInitialCondition();
        var lines = node.textContent.split("\n");
        node.removeChildren();

        for (var i = lines[0].length ? 0 : 1; i < lines.length; ++i) {
            var line = lines[i];
            var plainTextStart = 0;
            this._tokenizer.line = line;
            var column = 0;
            do {
                var newColumn = this._tokenizer.nextToken(column);
                var tokenType = this._tokenizer.tokenType;
                if (tokenType) {
                    if (column > plainTextStart) {
                        var plainText = line.substring(plainTextStart, column);
                        node.appendChild(document.createTextNode(plainText));
                    }
                    var token = line.substring(column, newColumn);
                    node.appendChild(this.createSpan(token, tokenType));
                    plainTextStart = newColumn;
                }
                column = newColumn;
           } while (column < line.length)

           if (plainTextStart < line.length) {
               var plainText = line.substring(plainTextStart, line.length);
               node.appendChild(document.createTextNode(plainText));
           }
           if (i < lines.length - 1)
               node.appendChild(document.createElement("br"));
        }
    }
}