DOMTextContentWalker.h revision 773979f92560dd1aead375c82fd75b584a141e5d 
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
32namespace WebCore {
33
34class Range;
35class 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.
39class DOMTextContentWalker {
40  WTF_MAKE_NONCOPYABLE(DOMTextContentWalker);
41public:
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
50private:
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