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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 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 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 "CachedImageClient.h"
#include "CachedResourceHandle.h"
#include "CSSImageGeneratorValue.h"
#include "CSSPrimitiveValue.h"
#include "Image.h"
#include "ImageObserver.h"
namespace WebCore {
class CachedImage;
class CrossfadeSubimageObserverProxy;
class RenderElement;
class Document;
class CSSCrossfadeValue : public CSSImageGeneratorValue {
friend class CrossfadeSubimageObserverProxy;
public:
static Ref<CSSCrossfadeValue> create(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue)
{
return adoptRef(*new CSSCrossfadeValue(fromValue, toValue));
}
~CSSCrossfadeValue();
String customCSSText() const;
RefPtr<Image> image(RenderElement*, const FloatSize&);
bool isFixedSize() const { return true; }
FloatSize fixedSize(const RenderElement*);
bool isPending() const;
bool knownToBeOpaque(const RenderElement*) const;
void loadSubimages(CachedResourceLoader&, const ResourceLoaderOptions&);
void setPercentage(PassRefPtr<CSSPrimitiveValue> percentageValue) { m_percentageValue = percentageValue; }
bool traverseSubresources(const std::function<bool (const CachedResource&)>& handler) const;
RefPtr<CSSCrossfadeValue> blend(const CSSCrossfadeValue&, double) const;
bool equals(const CSSCrossfadeValue&) const;
bool equalInputImages(const CSSCrossfadeValue&) const;
private:
CSSCrossfadeValue(PassRefPtr<CSSValue> fromValue, PassRefPtr<CSSValue> toValue)
: CSSImageGeneratorValue(CrossfadeClass)
, m_fromValue(fromValue)
, m_toValue(toValue)
, m_crossfadeSubimageObserver(this)
{
}
class CrossfadeSubimageObserverProxy final : public CachedImageClient {
public:
CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue)
: m_ownerValue(ownerValue)
, m_ready(false)
{
}
virtual ~CrossfadeSubimageObserverProxy() { }
virtual void imageChanged(CachedImage*, const IntRect* = nullptr) override;
void setReady(bool ready) { m_ready = ready; }
private:
CSSCrossfadeValue* m_ownerValue;
bool m_ready;
};
void crossfadeChanged(const IntRect&);
RefPtr<CSSValue> m_fromValue;
RefPtr<CSSValue> m_toValue;
RefPtr<CSSPrimitiveValue> m_percentageValue;
CachedResourceHandle<CachedImage> m_cachedFromImage;
CachedResourceHandle<CachedImage> m_cachedToImage;
RefPtr<Image> m_generatedImage;
CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSCrossfadeValue, isCrossfadeValue())
#endif // CSSCrossfadeValue_h
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