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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CSSCrossfadeValue_h
#define CSSCrossfadeValue_h
#include "core/css/CSSImageGeneratorValue.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/fetch/ImageResource.h"
#include "core/fetch/ImageResourceClient.h"
#include "core/fetch/ResourcePtr.h"
#include "platform/graphics/Image.h"
namespace WebCore {
class ImageResource;
class CrossfadeSubimageObserverProxy;
class RenderObject;
class Document;
class CSSCrossfadeValue : public CSSImageGeneratorValue {
friend class CrossfadeSubimageObserverProxy;
public:
static PassRefPtrWillBeRawPtr<CSSCrossfadeValue> create(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue)
{
return adoptRefWillBeNoop(new CSSCrossfadeValue(fromValue, toValue));
}
~CSSCrossfadeValue();
String customCSSText() const;
PassRefPtr<Image> image(RenderObject*, const IntSize&);
bool isFixedSize() const { return true; }
IntSize fixedSize(const RenderObject*);
bool isPending() const;
bool knownToBeOpaque(const RenderObject*) const;
void loadSubimages(ResourceFetcher*);
void setPercentage(PassRefPtrWillBeRawPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; }
bool hasFailedOrCanceledSubresources() const;
bool equals(const CSSCrossfadeValue&) const;
void traceAfterDispatch(Visitor*);
private:
CSSCrossfadeValue(PassRefPtrWillBeRawPtr<CSSValue> fromValue, PassRefPtrWillBeRawPtr<CSSValue> toValue)
: CSSImageGeneratorValue(CrossfadeClass)
, m_fromValue(fromValue)
, m_toValue(toValue)
, m_cachedFromImage(0)
, m_cachedToImage(0)
, m_crossfadeSubimageObserver(this) { }
class CrossfadeSubimageObserverProxy FINAL : public ImageResourceClient {
public:
CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue)
: m_ownerValue(ownerValue)
, m_ready(false) { }
virtual ~CrossfadeSubimageObserverProxy() { }
virtual void imageChanged(ImageResource*, const IntRect* = 0) OVERRIDE;
void setReady(bool ready) { m_ready = ready; }
private:
CSSCrossfadeValue* m_ownerValue;
bool m_ready;
};
void crossfadeChanged(const IntRect&);
RefPtrWillBeMember<CSSValue> m_fromValue;
RefPtrWillBeMember<CSSValue> m_toValue;
RefPtrWillBeMember<CSSPrimitiveValue> m_percentageValue;
ResourcePtr<ImageResource> m_cachedFromImage;
ResourcePtr<ImageResource> m_cachedToImage;
RefPtr<Image> m_generatedImage;
CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSCrossfadeValue, isCrossfadeValue());
} // namespace WebCore
#endif // CSSCrossfadeValue_h
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