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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 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 "CSSCursorImageValue.h"
#include "CSSImageGeneratorValue.h"
#include "CSSImageValue.h"
#include "StyleImage.h"
#if ENABLE(CSS_IMAGE_SET)
#include "CSSImageSetValue.h"
#endif
namespace WebCore {
// StylePendingImage is a placeholder StyleImage that is entered into the RenderStyle during
// style resolution, in order to avoid loading images that are not referenced by the final style.
// They should never exist in a RenderStyle after it has been returned from the style selector.
class StylePendingImage final : public StyleImage {
public:
static Ref<StylePendingImage> create(CSSValue* value) { return adoptRef(*new StylePendingImage(value)); }
CSSImageValue* cssImageValue() const { return is<CSSImageValue>(m_value) ? downcast<CSSImageValue>(m_value) : nullptr; }
CSSImageGeneratorValue* cssImageGeneratorValue() const { return is<CSSImageGeneratorValue>(m_value) ? static_cast<CSSImageGeneratorValue*>(m_value) : nullptr; }
CSSCursorImageValue* cssCursorImageValue() const { return is<CSSCursorImageValue>(m_value) ? downcast<CSSCursorImageValue>(m_value) : nullptr; }
#if ENABLE(CSS_IMAGE_SET)
CSSImageSetValue* cssImageSetValue() const { return is<CSSImageSetValue>(m_value) ? downcast<CSSImageSetValue>(m_value) : nullptr; }
#endif
void detachFromCSSValue() { m_value = nullptr; }
private:
virtual WrappedImagePtr data() const override { return const_cast<StylePendingImage*>(this); }
virtual PassRefPtr<CSSValue> cssValue() const override { return m_value; }
virtual FloatSize imageSize(const RenderElement*, float /*multiplier*/) const override { return FloatSize(); }
virtual bool imageHasRelativeWidth() const override { return false; }
virtual bool imageHasRelativeHeight() const override { return false; }
virtual void computeIntrinsicDimensions(const RenderElement*, Length& /* intrinsicWidth */ , Length& /* intrinsicHeight */, FloatSize& /* intrinsicRatio */) override { }
virtual bool usesImageContainerSize() const override { return false; }
virtual void setContainerSizeForRenderer(const RenderElement*, const FloatSize&, float) override { }
virtual void addClient(RenderElement*) override { }
virtual void removeClient(RenderElement*) override { }
virtual RefPtr<Image> image(RenderElement*, const FloatSize&) const override
{
ASSERT_NOT_REACHED();
return nullptr;
}
virtual bool knownToBeOpaque(const RenderElement*) const override { return false; }
StylePendingImage(CSSValue* value)
: m_value(value)
{
m_isPendingImage = true;
}
CSSValue* m_value; // Not retained; it owns us.
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_STYLE_IMAGE(StylePendingImage, isPendingImage)
#endif // StylePendingImage_h
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