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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 THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_FETCHED_IMAGE_SET_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_FETCHED_IMAGE_SET_H_
#include "third_party/blink/renderer/core/loader/resource/image_resource_observer.h"
#include "third_party/blink/renderer/core/style/style_image.h"
#include "third_party/blink/renderer/platform/geometry/layout_size.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
namespace blink {
class CSSImageSetValue;
class ImageResourceObserver;
// This class represents an <image> that loads one image resource out of a set
// of alternatives (the -webkit-image-set(...) function.)
//
// This class keeps one cached image from the set, and has access to a set of
// alternatives via the referenced CSSImageSetValue.
class StyleFetchedImageSet final : public StyleImage,
public ImageResourceObserver {
USING_PRE_FINALIZER(StyleFetchedImageSet, Dispose);
public:
static StyleFetchedImageSet* Create(ImageResourceContent* image,
float image_scale_factor,
CSSImageSetValue* value,
const KURL& url) {
return MakeGarbageCollected<StyleFetchedImageSet>(image, image_scale_factor,
value, url);
}
StyleFetchedImageSet(ImageResourceContent*,
float image_scale_factor,
CSSImageSetValue*,
const KURL&);
~StyleFetchedImageSet() override;
CSSValue* CssValue() const override;
CSSValue* ComputedCSSValue() const override;
// 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.
WrappedImagePtr Data() const override;
bool CanRender() const override;
bool IsLoaded() const override;
bool ErrorOccurred() const override;
FloatSize ImageSize(const Document&,
float multiplier,
const LayoutSize& default_object_size) const override;
bool ImageHasRelativeSize() const override;
void AddClient(ImageResourceObserver*) override;
void RemoveClient(ImageResourceObserver*) override;
scoped_refptr<Image> GetImage(const ImageResourceObserver&,
const Document&,
const ComputedStyle&,
const FloatSize& target_size) const override;
float ImageScaleFactor() const override { return image_scale_factor_; }
bool KnownToBeOpaque(const Document&, const ComputedStyle&) const override;
ImageResourceContent* CachedImage() const override;
void Trace(blink::Visitor*) override;
private:
bool IsEqual(const StyleImage& other) const override;
void Dispose();
String DebugName() const override { return "StyleFetchedImageSet"; }
Member<ImageResourceContent> best_fit_image_;
float image_scale_factor_;
Member<CSSImageSetValue> image_set_value_; // Not retained; it owns us.
const KURL url_;
};
DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImageSet, IsImageResourceSet());
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_STYLE_STYLE_FETCHED_IMAGE_SET_H_