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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 CSSImageSetValue_h
#define CSSImageSetValue_h
#include "core/css/CSSValueList.h"
#include "core/fetch/ResourceFetcher.h"
#include "platform/weborigin/Referrer.h"
namespace blink {
class ResourceFetcher;
class StyleFetchedImageSet;
class StyleImage;
class CSSImageSetValue : public CSSValueList {
public:
static PassRefPtrWillBeRawPtr<CSSImageSetValue> create()
{
return adoptRefWillBeNoop(new CSSImageSetValue());
}
~CSSImageSetValue();
StyleFetchedImageSet* cachedImageSet(ResourceFetcher*, float deviceScaleFactor, const ResourceLoaderOptions&);
StyleFetchedImageSet* cachedImageSet(ResourceFetcher*, float deviceScaleFactor);
// Returns a StyleFetchedImageSet if the best fit image has been cached already, otherwise a StylePendingImage.
StyleImage* cachedOrPendingImageSet(float);
String customCSSText() const;
bool isPending() const { return !m_accessedBestFitImage; }
struct ImageWithScale {
String imageURL;
Referrer referrer;
float scaleFactor;
};
bool hasFailedOrCanceledSubresources() const;
void traceAfterDispatch(Visitor* visitor) { CSSValueList::traceAfterDispatch(visitor); }
protected:
ImageWithScale bestImageForScaleFactor();
private:
CSSImageSetValue();
void fillImageSet();
static inline bool compareByScaleFactor(ImageWithScale first, ImageWithScale second) { return first.scaleFactor < second.scaleFactor; }
RefPtr<StyleImage> m_imageSet;
bool m_accessedBestFitImage;
// This represents the scale factor that we used to find the best fit image. It does not necessarily
// correspond to the scale factor of the best fit image.
float m_scaleFactor;
Vector<ImageWithScale> m_imagesInSet;
};
DEFINE_CSS_VALUE_TYPE_CASTS(CSSImageSetValue, isImageSetValue());
} // namespace blink
#endif // CSSImageSetValue_h
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