1 /* 2 * Copyright (C) 2011 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 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY 17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #ifndef DOMTextContentWalker_h 26 #define DOMTextContentWalker_h 27 28 #if OS(ANDROID) 29 30 #include "PlatformString.h" 31 32 namespace WebCore { 33 34 class Range; 35 class VisiblePosition; 36 37 // Explore the DOM tree to find the text contents up to a limit 38 // around a position in a given text node. 39 class DOMTextContentWalker { 40 WTF_MAKE_NONCOPYABLE(DOMTextContentWalker); 41 public: 42 DOMTextContentWalker(const VisiblePosition& position, unsigned maxLength); 43 44 String content() const; 45 unsigned hitOffsetInContent() const; 46 47 // Convert start/end positions in the content text string into a text range. 48 PassRefPtr<Range> contentOffsetsToRange(unsigned startInContent, unsigned endInContent); 49 50 private: 51 RefPtr<Range> m_contentRange; 52 size_t m_hitOffsetInContent; 53 }; 54 55 } // namespace WebCore 56 57 #endif // OS(ANDROID) 58 59 #endif // DOMTextContentWalker_h 60 61
