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 WebCore { 37 38 class ImageResource; 39 class CrossfadeSubimageObserverProxy; 40 class RenderObject; 41 class Document; 42 43 class CSSCrossfadeValue : public CSSImageGeneratorValue { 44 friend class CrossfadeSubimageObserverProxy; 45 public: create(PassRefPtrWillBeRawPtr<CSSValue> fromValue,PassRefPtrWillBeRawPtr<CSSValue> toValue)46 static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue) 47 { 48 return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue)); 49 } 50 51 ~CSSCrossfadeValue(); 52 53 String customCSSText() const; 54 55 PassRefPtr<Image> image(RenderObject*, const IntSize&); isFixedSize()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(ResourceFetcher*); 63 setPercentage(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue)64 void setPercentage(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; } 65 66 bool hasFailedOrCanceledSubresources() const; 67 68 bool equals(const CSSCrossfadeValue&) const; 69 70 void traceAfterDispatch(Visitor*); 71 72 private: CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue,PassRefPtrWillBeRawPtr<CSSValue> toValue)73 CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue) 74 : CSSImageGeneratorValue(CrossfadeClass) 75 , m_fromValue(fromValue) 76 , m_toValue(toValue) 77 , m_cachedFromImage(0) 78 , m_cachedToImage(0) 79 , m_crossfadeSubimageObserver(this) { } 80 81 class CrossfadeSubimageObserverProxy FINAL : public ImageResourceClient { 82 public: CrossfadeSubimageObserverProxy(CSSCrossfadeValue * ownerValue)83 CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue) 84 : m_ownerValue(ownerValue) 85 , m_ready(false) { } 86 ~CrossfadeSubimageObserverProxy()87 virtual ~CrossfadeSubimageObserverProxy() { } 88 virtual void imageChanged(ImageResource*, const IntRect* = 0) OVERRIDE; setReady(bool ready)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 RefPtrWillBeMember<CSSValue> m_fromValue; 98 RefPtrWillBeMember<CSSValue> m_toValue; 99 RefPtrWillBeMember<CSSPrimitiveValue> m_percentageValue; 100 101 ResourcePtr<ImageResource> m_cachedFromImage; 102 ResourcePtr<ImageResource> m_cachedToImage; 103 104 RefPtr<Image> m_generatedImage; 105 106 CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver; 107 }; 108 109 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue()); 110 111 } // namespace WebCore 112 113 #endif // CSSCrossfadeValue_h 114