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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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