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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 THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CROSSFADE_VALUE_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CROSSFADE_VALUE_H_
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/css/css_image_generator_value.h"
#include "third_party/blink/renderer/core/css/css_primitive_value.h"
#include "third_party/blink/renderer/core/loader/resource/image_resource_content.h"
#include "third_party/blink/renderer/core/loader/resource/image_resource_observer.h"
#include "third_party/blink/renderer/platform/graphics/image.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
class CrossfadeSubimageObserverProxy;
namespace cssvalue {
class CORE_EXPORT CSSCrossfadeValue final : public CSSImageGeneratorValue {
friend class blink::CrossfadeSubimageObserverProxy;
USING_PRE_FINALIZER(CSSCrossfadeValue, Dispose);
public:
CSSCrossfadeValue(CSSValue* from_value,
CSSValue* to_value,
CSSPrimitiveValue* percentage_value);
~CSSCrossfadeValue();
String CustomCSSText() const;
scoped_refptr<Image> GetImage(const ImageResourceObserver&,
const Document&,
const ComputedStyle&,
const FloatSize& target_size) const;
bool IsFixedSize() const { return true; }
FloatSize FixedSize(const Document&, const FloatSize&) const;
bool IsPending() const;
bool KnownToBeOpaque(const Document&, const ComputedStyle&) const;
void LoadSubimages(const Document&);
bool HasFailedOrCanceledSubresources() const;
bool Equals(const CSSCrossfadeValue&) const;
CSSCrossfadeValue* ComputedCSSValue(const ComputedStyle&,
bool allow_visited_style);
void TraceAfterDispatch(blink::Visitor*) const;
private:
void Dispose();
class CrossfadeSubimageObserverProxy final : public ImageResourceObserver {
DISALLOW_NEW();
public:
explicit CrossfadeSubimageObserverProxy(CSSCrossfadeValue* owner_value)
: owner_value_(owner_value), ready_(false) {}
~CrossfadeSubimageObserverProxy() override = default;
void Trace(Visitor* visitor) { visitor->Trace(owner_value_); }
void ImageChanged(ImageResourceContent*, CanDeferInvalidation) override;
bool WillRenderImage() override;
String DebugName() const override {
return "CrossfadeSubimageObserverProxy";
}
void SetReady(bool ready) { ready_ = ready; }
private:
Member<CSSCrossfadeValue> owner_value_;
bool ready_;
};
bool WillRenderImage() const;
void CrossfadeChanged(ImageResourceObserver::CanDeferInvalidation);
Member<CSSValue> from_value_;
Member<CSSValue> to_value_;
Member<CSSPrimitiveValue> percentage_value_;
Member<ImageResourceContent> cached_from_image_;
Member<ImageResourceContent> cached_to_image_;
CrossfadeSubimageObserverProxy crossfade_subimage_observer_;
};
} // namespace cssvalue
template <>
struct DowncastTraits<cssvalue::CSSCrossfadeValue> {
static bool AllowFrom(const CSSValue& value) {
return value.IsCrossfadeValue();
}
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_CSS_CSS_CROSSFADE_VALUE_H_
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