1/* 2 * Copyright (C) 2011 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 COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef CSSCrossfadeValue_h 27#define CSSCrossfadeValue_h 28 29#include "CachedImageClient.h" 30#include "CachedResourceHandle.h" 31#include "CSSImageGeneratorValue.h" 32#include "CSSPrimitiveValue.h" 33#include "Image.h" 34#include "ImageObserver.h" 35 36namespace WebCore { 37 38class CachedImage; 39class CrossfadeSubimageObserverProxy; 40class RenderObject; 41class Document; 42 43class CSSCrossfadeValue : public CSSImageGeneratorValue { 44 friend class CrossfadeSubimageObserverProxy; 45public: 46 static PassRefPtr<CSSCrossfadeValue> create(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue) 47 { 48 return adoptRef(new CSSCrossfadeValue(fromValue, toValue)); 49 } 50 51 ~CSSCrossfadeValue(); 52 53 String customCssText() const; 54 55 PassRefPtr<Image> image(RenderObject*, const IntSize&); 56 bool isFixedSize() const { return true; } 57 IntSize fixedSize(const RenderObject*); 58 59 bool isPending() const; 60 bool knownToBeOpaque(const RenderObject*) const; 61 62 void loadSubimages(CachedResourceLoader*); 63 64 void setPercentage(PassRefPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; } 65 66 bool hasFailedOrCanceledSubresources() const; 67 68 bool equals(const CSSCrossfadeValue&) const; 69 70private: 71 CSSCrossfadeValue(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue) 72 : CSSImageGeneratorValue(CrossfadeClass) 73 , m_fromValue(fromValue) 74 , m_toValue(toValue) 75 , m_crossfadeSubimageObserver(this) 76 { 77 } 78 79 class CrossfadeSubimageObserverProxy : public CachedImageClient { 80 public: 81 CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue) 82 : m_ownerValue(ownerValue) 83 , m_ready(false) 84 { 85 } 86 87 virtual ~CrossfadeSubimageObserverProxy() { } 88 virtual void imageChanged(CachedImage*, const IntRect* = 0) OVERRIDE; 89 void setReady(bool ready) { m_ready = ready; } 90 private: 91 CSSCrossfadeValue* m_ownerValue; 92 bool m_ready; 93 }; 94 95 void crossfadeChanged(const IntRect&); 96 97 RefPtr<CSSValue> m_fromValue; 98 RefPtr<CSSValue> m_toValue; 99 RefPtr<CSSPrimitiveValue> m_percentageValue; 100 101 CachedResourceHandle<CachedImage> m_cachedFromImage; 102 CachedResourceHandle<CachedImage> m_cachedToImage; 103 104 RefPtr<Image> m_generatedImage; 105 106 CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver; 107}; 108 109} // namespace WebCore 110 111#endif // CSSCrossfadeValue_h 112