Demo/bin/Debug/front_end/platform/DOMExtension.js

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/*
 * Copyright (C) 2007 Apple Inc.  All rights reserved.
 * Copyright (C) 2012 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:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  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.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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.
 *
 * Contains diff method based on Javascript Diff Algorithm By John Resig
 * http://ejohn.org/files/jsdiff.js (released under the MIT license).
 */

/**
 * @param {number} offset
 * @param {string} stopCharacters
 * @param {!Node} stayWithinNode
 * @param {string=} direction
 * @return {!Range}
 */
Node.prototype.rangeOfWord = function(offset, stopCharacters, stayWithinNode, direction)
{
    var startNode;
    var startOffset = 0;
    var endNode;
    var endOffset = 0;

    if (!stayWithinNode)
        stayWithinNode = this;

    if (!direction || direction === "backward" || direction === "both") {
        var node = this;
        while (node) {
            if (node === stayWithinNode) {
                if (!startNode)
                    startNode = stayWithinNode;
                break;
            }

            if (node.nodeType === Node.TEXT_NODE) {
                var start = (node === this ? (offset - 1) : (node.nodeValue.length - 1));