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/*
* Copyright (C) 2012 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. AND ITS CONTRIBUTORS ``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 ITS 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 StyleCachedImageSet_h
#define StyleCachedImageSet_h
#if ENABLE(CSS_IMAGE_SET)
#include "CachedImageClient.h"
#include "CachedResourceHandle.h"
#include "LayoutSize.h"
#include "StyleImage.h"
namespace WebCore {
class CachedImage;
class CSSImageSetValue;
// This class keeps one cached image and has access to a set of alternatives.
class StyleCachedImageSet : public StyleImage, private CachedImageClient {
WTF_MAKE_FAST_ALLOCATED;
public:
static PassRefPtr<StyleCachedImageSet> create(CachedImage* image, float imageScaleFactor, CSSImageSetValue* value)
{
return adoptRef(new StyleCachedImageSet(image, imageScaleFactor, value));
}
virtual ~StyleCachedImageSet();
virtual PassRefPtr<CSSValue> cssValue() const;
// FIXME: This is used by StyleImage for equals comparison, but this implementation
// only looks at the image from the set that we have loaded. I'm not sure if that is
// meaningful enough or not.
virtual WrappedImagePtr data() const { return m_bestFitImage.get(); }
void clearImageSetValue() { m_imageSetValue = 0; }
virtual bool canRender(const RenderObject*, float multiplier) const;
virtual bool isLoaded() const;
virtual bool errorOccurred() const;
virtual LayoutSize imageSize(const RenderObject*, float multiplier) const;
virtual bool imageHasRelativeWidth() const;
virtual bool imageHasRelativeHeight() const;
virtual void computeIntrinsicDimensions(const RenderObject*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio);
virtual bool usesImageContainerSize() const;
virtual void setContainerSizeForRenderer(const RenderObject*, const IntSize&, float);
virtual void addClient(RenderObject*);
virtual void removeClient(RenderObject*);
virtual PassRefPtr<Image> image(RenderObject*, const IntSize&) const;
virtual float imageScaleFactor() const { return m_imageScaleFactor; }
virtual bool knownToBeOpaque(const RenderObject*) const OVERRIDE;
virtual CachedImage* cachedImage() const OVERRIDE { return m_bestFitImage.get(); }
private:
StyleCachedImageSet(CachedImage*, float imageScaleFactor, CSSImageSetValue*);
CachedResourceHandle<CachedImage> m_bestFitImage;
float m_imageScaleFactor;
CSSImageSetValue* m_imageSetValue; // Not retained; it owns us.
};
} // namespace WebCore
#endif // ENABLE(CSS_IMAGE_SET)
#endif // StyleCachedImageSet_h
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