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 "core/css/CSSImageGeneratorValue.h" 30 #include "core/css/CSSPrimitiveValue.h" 31 #include "core/fetch/ImageResource.h" 32 #include "core/fetch/ImageResourceClient.h" 33 #include "core/fetch/ResourcePtr.h" 34 #include "platform/graphics/Image.h" 35 36 namespace blink { 37 38 class ImageResource; 39 class CrossfadeSubimageObserverProxy; 40 class RenderObject; 41 42 class CSSCrossfadeValue : public CSSImageGeneratorValue { 43 friend class CrossfadeSubimageObserverProxy; 44 public: create(PassRefPtrWillBeRawPtr<CSSValue> fromValue,PassRefPtrWillBeRawPtr<CSSValue> toValue)45 static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue) 46 { 47 return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue)); 48 } 49 50 ~CSSCrossfadeValue(); 51 52 String customCSSText() const; 53 54 PassRefPtr<Image> image(RenderObject*, const IntSize&); isFixedSize()55 bool isFixedSize() const { return true; } 56 IntSize fixedSize(const RenderObject*); 57 58 bool isPending() const; 59 bool knownToBeOpaque(const RenderObject*) const; 60 61 void loadSubimages(ResourceFetcher*); 62 setPercentage(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue)63 void setPercentage(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; } 64 65 bool hasFailedOrCanceledSubresources() const; 66 67 bool equals(const CSSCrossfadeValue&) const; 68 69 void traceAfterDispatch(Visitor*); 70 71 private: CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue,PassRefPtrWillBeRawPtr<CSSValue> toValue)72 CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue) 73 : CSSImageGeneratorValue(CrossfadeClass) 74 , m_fromValue(fromValue) 75 , m_toValue(toValue) 76 , m_cachedFromImage(0) 77 , m_cachedToImage(0) 78 , m_crossfadeSubimageObserver(this) { } 79 80 class CrossfadeSubimageObserverProxy FINAL : public ImageResourceClient { 81 public: CrossfadeSubimageObserverProxy(CSSCrossfadeValue * ownerValue)82 CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue) 83 : m_ownerValue(ownerValue) 84 , m_ready(false) { } 85 ~CrossfadeSubimageObserverProxy()86 virtual ~CrossfadeSubimageObserverProxy() { } 87 virtual void imageChanged(ImageResource*, const IntRect* = 0) OVERRIDE; setReady(bool ready)88 void setReady(bool ready) { m_ready = ready; } 89 private: 90 CSSCrossfadeValue* m_ownerValue; 91 bool m_ready; 92 }; 93 94 void crossfadeChanged(const IntRect&); 95 96 RefPtrWillBeMember<CSSValue> m_fromValue; 97 RefPtrWillBeMember<CSSValue> m_toValue; 98 RefPtrWillBeMember<CSSPrimitiveValue> m_percentageValue; 99 100 ResourcePtr<ImageResource> m_cachedFromImage; 101 ResourcePtr<ImageResource> m_cachedToImage; 102 103 RefPtr<Image> m_generatedImage; 104 105 CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver; 106 }; 107 108 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue()); 109 110 } // namespace blink 111 112 #endif // CSSCrossfadeValue_h 113