third_party/WebKit/Source/core/css/CSSCrossfadeValue.h

   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 LayoutObject;
  41
  42 class CSSCrossfadeValue final : public CSSImageGeneratorValue {
  43     friend class CrossfadeSubimageObserverProxy;
  44 public:
  45     static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue)
  46     {
  47         return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue, percentageValue));
  48     }
  49
  50     ~CSSCrossfadeValue();
  51
  52     String customCSSText() const;
  53
  54     PassRefPtr<Image> image(LayoutObject*, const IntSize&);
  55     bool isFixedSize() const { return true; }
  56     IntSize fixedSize(const LayoutObject*);
  57
  58     bool isPending() const;
  59     bool knownToBeOpaque(const LayoutObject*) const;
  60
  61     void loadSubimages(Document*);
  62
  63     bool hasFailedOrCanceledSubresources() const;
  64
  65     bool equals(const CSSCrossfadeValue&) const;
  66
  67     PassRefPtrWillBeRawPtr<CSSCrossfadeValue> valueWithURLsMadeAbsolute();
  68
  69     // Promptly remove as a ImageResource client.
  70     EAGERLY_FINALIZE();
  71 #if ENABLE(OILPAN)
  72     DECLARE_EAGER_FINALIZATION_OPERATOR_NEW();
  73 #endif
  74     DECLARE_TRACE_AFTER_DISPATCH();
  75
  76 private:
  77     CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue, PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue)
  78         : CSSImageGeneratorValue(CrossfadeClass)
  79         , m_fromValue(fromValue)
  80         , m_toValue(toValue)
  81         , m_percentageValue(percentageValue)
  82         , m_cachedFromImage(nullptr)
  83         , m_cachedToImage(nullptr)
  84         , m_crossfadeSubimageObserver(this) { }
  85
  86     class CrossfadeSubimageObserverProxy final : public ImageResourceClient {
  87         DISALLOW_ALLOCATION();
  88     public:
  89         explicit CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue)
  90             : m_ownerValue(ownerValue)
  91             , m_ready(false) { }
  92
  93         ~CrossfadeSubimageObserverProxy() override { }
  94         DEFINE_INLINE_TRACE()
  95         {
  96             visitor->trace(m_ownerValue);
  97         }
  98
  99         void imageChanged(ImageResource*, const IntRect* = nullptr) override;
 100         void setReady(bool ready) { m_ready = ready; }
 101     private:
 102         RawPtrWillBeMember<CSSCrossfadeValue> m_ownerValue;
 103         bool m_ready;
 104     };
 105
 106     void crossfadeChanged(const IntRect&);
 107
 108     RefPtrWillBeMember<CSSValue> m_fromValue;
 109     RefPtrWillBeMember<CSSValue> m_toValue;
 110     RefPtrWillBeMember<CSSPrimitiveValue> m_percentageValue;
 111
 112     ResourcePtr<ImageResource> m_cachedFromImage;
 113     ResourcePtr<ImageResource> m_cachedToImage;
 114
 115     RefPtr<Image> m_generatedImage;
 116
 117     CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
 118 };
 119
 120 DEFINE_CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue());
 121
 122 } // namespace blink
 123
 124 #endif // CSSCrossfadeValue_h