1/* 2 * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple 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'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef TextAutoSizing_h 27#define TextAutoSizing_h 28 29#if ENABLE(IOS_TEXT_AUTOSIZING) 30 31#include "RenderStyle.h" 32#include <wtf/HashSet.h> 33#include <wtf/RefCounted.h> 34#include <wtf/RefPtr.h> 35 36namespace WebCore { 37 38class Document; 39class Node; 40 41class TextAutoSizingKey { 42public: 43 TextAutoSizingKey(); 44 TextAutoSizingKey(RenderStyle*, Document*); 45 ~TextAutoSizingKey(); 46 TextAutoSizingKey(const TextAutoSizingKey&); 47 TextAutoSizingKey& operator=(const TextAutoSizingKey&); 48 Document* doc() const { return m_doc; } 49 RenderStyle* style() const { return m_style; } 50 inline bool isValidDoc() const { return m_doc && m_doc != deletedKeyDoc(); } 51 inline bool isValidStyle() const { return m_style && m_style != deletedKeyStyle(); } 52 static Document* deletedKeyDoc() { return reinterpret_cast<Document*>(-1); } 53 static RenderStyle* deletedKeyStyle() { return reinterpret_cast<RenderStyle*>(-1); } 54private: 55 void ref() const; 56 void deref() const; 57 RenderStyle* m_style; 58 Document* m_doc; 59}; 60 61inline bool operator==(const TextAutoSizingKey& a, const TextAutoSizingKey& b) 62{ 63 if (a.isValidStyle() && b.isValidStyle()) 64 return a.style()->equalForTextAutosizing(b.style()); 65 return a.style() == b.style(); 66} 67 68struct TextAutoSizingHash { 69 static unsigned hash(const TextAutoSizingKey& key) { return key.style()->hashForTextAutosizing(); } 70 static bool equal(const TextAutoSizingKey& a, const TextAutoSizingKey& b) { return a == b; } 71 static const bool safeToCompareToEmptyOrDeleted = true; 72}; 73 74class TextAutoSizingValue : public RefCounted<TextAutoSizingValue> { 75public: 76 static PassRefPtr<TextAutoSizingValue> create() 77 { 78 return adoptRef(new TextAutoSizingValue); 79 } 80 81 void addNode(Node*, float size); 82 bool adjustNodeSizes(); 83 int numNodes() const; 84 void reset(); 85private: 86 TextAutoSizingValue() { } 87 HashSet<RefPtr<Node> > m_autoSizedNodes; 88}; 89 90} // namespace WebCore 91 92#endif // ENABLE(IOS_TEXT_AUTOSIZING) 93 94#endif // TextAutoSizing_h 95