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/rendering/InlineTextBox.h" 36 #include "core/rendering/RenderText.h" 37 #include "wtf/HashMap.h" 38 #include "wtf/RefPtr.h" 39 40 namespace WebCore { 41 42 class InlineTextBox; 43 44 // High-level abstraction of InlineTextBox to allow the accessibility module to 45 // get information about InlineTextBoxes without tight coupling. 46 class AbstractInlineTextBox : public RefCounted<AbstractInlineTextBox> { 47 private: AbstractInlineTextBox(RenderText * renderText,InlineTextBox * inlineTextBox)48 AbstractInlineTextBox(RenderText* renderText, InlineTextBox* inlineTextBox) 49 : m_renderText(renderText) 50 , m_inlineTextBox(inlineTextBox) 51 { 52 } 53 54 static PassRefPtr<AbstractInlineTextBox> getOrCreate(RenderText*, InlineTextBox*); 55 static void willDestroy(InlineTextBox*); 56 57 friend class RenderText; 58 friend class InlineTextBox; 59 60 public: 61 struct WordBoundaries { WordBoundariesWordBoundaries62 WordBoundaries(int startIndex, int endIndex) : startIndex(startIndex), endIndex(endIndex) { } 63 int startIndex; 64 int endIndex; 65 }; 66 67 enum Direction { 68 LeftToRight, 69 RightToLeft, 70 TopToBottom, 71 BottomToTop 72 }; 73 renderText()74 RenderText* renderText() const { return m_renderText; } 75 76 PassRefPtr<AbstractInlineTextBox> nextInlineTextBox() const; 77 LayoutRect bounds() const; 78 unsigned start() const; 79 unsigned len() const; 80 Direction direction() const; 81 void characterWidths(Vector<float>&) 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 AbstractInlineTextBox::willDestroy. 89 RenderText* m_renderText; 90 InlineTextBox* m_inlineTextBox; 91 92 typedef HashMap<InlineTextBox*, RefPtr<AbstractInlineTextBox> > InlineToAbstractInlineTextBoxHashMap; 93 static InlineToAbstractInlineTextBoxHashMap* gAbstractInlineTextBoxMap; 94 }; 95 96 } // namespace WebCore 97 98 #endif // AbstractInlineTextBox_h 99