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1 /* | |
2 * Copyright (C) 2013 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 #ifndef AbstractInlineTextBox_h | |
32 #define AbstractInlineTextBox_h | |
33 | |
34 #include "core/dom/Range.h" | |
35 #include "core/layout/line/FloatToLayoutUnit.h" | |
36 #include "core/layout/line/InlineTextBox.h" | |
37 #include "core/rendering/RenderText.h" | |
38 #include "wtf/HashMap.h" | |
39 #include "wtf/RefPtr.h" | |
40 | |
41 namespace blink { | |
42 | |
43 class InlineTextBox; | |
44 | |
45 // High-level abstraction of InlineTextBox to allow the accessibility module to | |
46 // get information about InlineTextBoxes without tight coupling. | |
47 class AbstractInlineTextBox : public RefCounted<AbstractInlineTextBox> { | |
48 private: | |
49 AbstractInlineTextBox(RenderText* renderText, InlineTextBox* inlineTextBox) | |
50 : m_renderText(renderText) | |
51 , m_inlineTextBox(inlineTextBox) | |
52 { | |
53 } | |
54 | |
55 static PassRefPtr<AbstractInlineTextBox> getOrCreate(RenderText*, InlineText
Box*); | |
56 static void willDestroy(InlineTextBox*); | |
57 | |
58 friend class RenderText; | |
59 friend class InlineTextBox; | |
60 | |
61 public: | |
62 struct WordBoundaries { | |
63 WordBoundaries(int startIndex, int endIndex) : startIndex(startIndex), e
ndIndex(endIndex) { } | |
64 int startIndex; | |
65 int endIndex; | |
66 }; | |
67 | |
68 enum Direction { | |
69 LeftToRight, | |
70 RightToLeft, | |
71 TopToBottom, | |
72 BottomToTop | |
73 }; | |
74 | |
75 RenderText* renderText() const { return m_renderText; } | |
76 | |
77 PassRefPtr<AbstractInlineTextBox> nextInlineTextBox() const; | |
78 LayoutRect bounds() const; | |
79 unsigned len() const; | |
80 Direction direction() const; | |
81 void characterWidths(Vector<FloatWillBeLayoutUnit>&) const; | |
82 void wordBoundaries(Vector<WordBoundaries>&) const; | |
83 String text() const; | |
84 | |
85 private: | |
86 void detach(); | |
87 | |
88 // Weak ptrs; these are nulled when InlineTextBox::destroy() calls AbstractI
nlineTextBox::willDestroy. | |
89 RenderText* m_renderText; | |
90 InlineTextBox* m_inlineTextBox; | |
91 | |
92 typedef HashMap<InlineTextBox*, RefPtr<AbstractInlineTextBox>> InlineToAbstr
actInlineTextBoxHashMap; | |
93 static InlineToAbstractInlineTextBoxHashMap* gAbstractInlineTextBoxMap; | |
94 }; | |
95 | |
96 } // namespace blink | |
97 | |
98 #endif // AbstractInlineTextBox_h | |
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