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/*
* Copyright (C) 2010 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 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 StylePendingImage_h
#define StylePendingImage_h
#include "core/css/CSSImageGeneratorValue.h"
#include "core/css/CSSImageSetValue.h"
#include "core/css/CSSImageValue.h"
#include "core/css/CSSPaintValue.h"
#include "core/style/StyleImage.h"
#include "platform/graphics/Image.h"
namespace blink {
// StylePendingImage is a placeholder StyleImage that is entered into the
// ComputedStyle during style resolution, in order to avoid loading images that
// are not referenced by the final style. They should never exist in a
// ComputedStyle after it has been returned from the style selector.
class StylePendingImage final : public StyleImage {
public:
static StylePendingImage* create(const CSSValue& value) {
return new StylePendingImage(value);
}
WrappedImagePtr data() const override { return m_value.get(); }
CSSValue* cssValue() const override { return m_value; }
CSSValue* computedCSSValue() const override {
ASSERT_NOT_REACHED();
return nullptr;
}
CSSImageValue* cssImageValue() const {
return m_value->isImageValue() ? toCSSImageValue(m_value.get()) : 0;
}
CSSPaintValue* cssPaintValue() const {
return m_value->isPaintValue() ? toCSSPaintValue(m_value.get()) : 0;
}
CSSImageGeneratorValue* cssImageGeneratorValue() const {
return m_value->isImageGeneratorValue()
? toCSSImageGeneratorValue(m_value.get())
: 0;
}
CSSImageSetValue* cssImageSetValue() const {
return m_value->isImageSetValue() ? toCSSImageSetValue(m_value.get()) : 0;
}
LayoutSize imageSize(const LayoutObject&,
float /*multiplier*/,
const LayoutSize& /*defaultObjectSize*/) const override {
return LayoutSize();
}
bool imageHasRelativeSize() const override { return false; }
bool usesImageContainerSize() const override { return false; }
void addClient(LayoutObject*) override {}
void removeClient(LayoutObject*) override {}
PassRefPtr<Image> image(const LayoutObject&,
const IntSize&,
float) const override {
ASSERT_NOT_REACHED();
return nullptr;
}
bool knownToBeOpaque(const LayoutObject&) const override { return false; }
DEFINE_INLINE_VIRTUAL_TRACE() {
visitor->trace(m_value);
StyleImage::trace(visitor);
}
private:
explicit StylePendingImage(const CSSValue& value)
: m_value(const_cast<CSSValue*>(&value)) {
m_isPendingImage = true;
}
// TODO(sashab): Replace this with <const CSSValue> once Member<>
// supports const types.
Member<CSSValue> m_value;
};
DEFINE_STYLE_IMAGE_TYPE_CASTS(StylePendingImage, isPendingImage());
} // namespace blink
#endif
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