CSSCrossfadeValue.h [plain text]
#ifndef CSSCrossfadeValue_h
#define CSSCrossfadeValue_h
#include "CachedImageClient.h"
#include "CachedResourceHandle.h"
#include "CSSImageGeneratorValue.h"
#include "CSSPrimitiveValue.h"
#include "Image.h"
#include "ImageObserver.h"
namespace WebCore {
class CachedImage;
class CrossfadeSubimageObserverProxy;
class RenderElement;
class Document;
class CSSCrossfadeValue : public CSSImageGeneratorValue {
friend class CrossfadeSubimageObserverProxy;
public:
static Ref<CSSCrossfadeValue> create(Ref<CSSValue>&& fromValue, Ref<CSSValue>&& toValue, Ref<CSSPrimitiveValue>&& percentageValue, bool prefixed = false)
{
return adoptRef(*new CSSCrossfadeValue(WTFMove(fromValue), WTFMove(toValue), WTFMove(percentageValue), prefixed));
}
~CSSCrossfadeValue();
String customCSSText() const;
RefPtr<Image> image(RenderElement*, const FloatSize&);
bool isFixedSize() const { return true; }
FloatSize fixedSize(const RenderElement*);
bool isPrefixed() const { return m_isPrefixed; }
bool isPending();
bool knownToBeOpaque(const RenderElement*) const;
void loadSubimages(CachedResourceLoader&, const ResourceLoaderOptions&);
bool traverseSubresources(const std::function<bool (const CachedResource&)>& handler) const;
RefPtr<CSSCrossfadeValue> blend(const CSSCrossfadeValue&, double) const;
bool equals(const CSSCrossfadeValue&) const;
bool equalInputImages(const CSSCrossfadeValue&) const;
private:
CSSCrossfadeValue(Ref<CSSValue>&& fromValue, Ref<CSSValue>&& toValue, Ref<CSSPrimitiveValue>&& percentageValue, bool prefixed)
: CSSImageGeneratorValue(CrossfadeClass)
, m_fromValue(WTFMove(fromValue))
, m_toValue(WTFMove(toValue))
, m_percentageValue(WTFMove(percentageValue))
, m_crossfadeSubimageObserver(this)
, m_isPrefixed(prefixed)
{
}
class CrossfadeSubimageObserverProxy final : public CachedImageClient {
public:
CrossfadeSubimageObserverProxy(CSSCrossfadeValue* ownerValue)
: m_ownerValue(ownerValue)
, m_ready(false)
{
}
virtual ~CrossfadeSubimageObserverProxy() { }
void imageChanged(CachedImage*, const IntRect* = nullptr) override;
void setReady(bool ready) { m_ready = ready; }
private:
CSSCrossfadeValue* m_ownerValue;
bool m_ready;
};
void crossfadeChanged(const IntRect&);
Ref<CSSValue> m_fromValue;
Ref<CSSValue> m_toValue;
Ref<CSSPrimitiveValue> m_percentageValue;
CachedResourceHandle<CachedImage> m_cachedFromImage;
CachedResourceHandle<CachedImage> m_cachedToImage;
RefPtr<Image> m_generatedImage;
CrossfadeSubimageObserverProxy m_crossfadeSubimageObserver;
bool m_isPrefixed { false };
};
}
SPECIALIZE_TYPE_TRAITS_CSS_VALUE(CSSCrossfadeValue, isCrossfadeValue())
#endif // CSSCrossfadeValue_h