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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
* (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
* Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef RenderImage_h
#define RenderImage_h
#include "core/rendering/RenderImageResource.h"
#include "core/rendering/RenderReplaced.h"
namespace blink {
class HTMLAreaElement;
class HTMLMapElement;
class RenderImage : public RenderReplaced {
public:
// These are the paddings to use when displaying either alt text or an image.
static const unsigned short paddingWidth = 4;
static const unsigned short paddingHeight = 4;
RenderImage(Element*);
virtual ~RenderImage();
virtual void destroy() override;
static RenderImage* createAnonymous(Document*);
void setImageResource(PassOwnPtr<RenderImageResource>);
RenderImageResource* imageResource() { return m_imageResource.get(); }
const RenderImageResource* imageResource() const { return m_imageResource.get(); }
ImageResource* cachedImage() const { return m_imageResource ? m_imageResource->cachedImage() : 0; }
bool setImageSizeForAltText(ImageResource* newImage = 0);
void updateAltText();
HTMLMapElement* imageMap() const;
void areaElementFocusChanged(HTMLAreaElement*);
void setIsGeneratedContent(bool generated = true) { m_isGeneratedContent = generated; }
bool isGeneratedContent() const { return m_isGeneratedContent; }
String altText() const { return m_altText; }
inline void setImageDevicePixelRatio(float factor) { m_imageDevicePixelRatio = factor; }
float imageDevicePixelRatio() const { return m_imageDevicePixelRatio; }
virtual void intrinsicSizeChanged() override
{
if (m_imageResource)
imageChanged(m_imageResource->imagePtr());
}
protected:
virtual bool needsPreferredWidthsRecalculation() const override final;
virtual RenderBox* embeddedContentBox() const override final;
virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio) const override final;
virtual void imageChanged(WrappedImagePtr, const IntRect* = 0) override;
virtual void paint(PaintInfo&, const LayoutPoint&) override final;
virtual void paintBoxDecorationBackground(PaintInfo&, const LayoutPoint&) override final;
virtual void layout() override;
virtual bool updateImageLoadingPriorities() override final;
virtual bool isOfType(RenderObjectType type) const override { return type == RenderObjectRenderImage || RenderReplaced::isOfType(type); }
private:
virtual const char* renderName() const override { return "RenderImage"; }
virtual bool isImage() const override { return true; }
virtual void paintReplaced(PaintInfo&, const LayoutPoint&) override;
virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const override final;
virtual bool computeBackgroundIsKnownToBeObscured() override final;
virtual LayoutUnit minimumReplacedHeight() const override;
virtual void notifyFinished(Resource*) override final;
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override final;
virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const override final;
IntSize imageSizeForError(ImageResource*) const;
void paintInvalidationOrMarkForLayout(bool imageSizeChanged, const IntRect* = 0);
void updateIntrinsicSizeIfNeeded(const LayoutSize&);
// Update the size of the image to be rendered. Object-fit may cause this to be different from the CSS box's content rect.
void updateInnerContentRect();
// Text to display as long as the image isn't available.
String m_altText;
OwnPtr<RenderImageResource> m_imageResource;
bool m_didIncrementVisuallyNonEmptyPixelCount;
bool m_isGeneratedContent;
float m_imageDevicePixelRatio;
friend class RenderImageScaleObserver;
};
DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderImage, isRenderImage());
} // namespace blink
#endif // RenderImage_h