1/* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com) 5 * (C) 2006 Samuel Weinig (sam.weinig@gmail.com) 6 * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved. 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 * 23 */ 24 25#ifndef RenderImage_h 26#define RenderImage_h 27 28#include "RenderImageResource.h" 29#include "RenderReplaced.h" 30 31namespace WebCore { 32 33class HTMLAreaElement; 34class HTMLMapElement; 35 36class RenderImage : public RenderReplaced { 37public: 38 RenderImage(Element*); 39 virtual ~RenderImage(); 40 41 static RenderImage* createAnonymous(Document*); 42 43 void setImageResource(PassOwnPtr<RenderImageResource>); 44 45 RenderImageResource* imageResource() { return m_imageResource.get(); } 46 const RenderImageResource* imageResource() const { return m_imageResource.get(); } 47 CachedImage* cachedImage() const { return m_imageResource ? m_imageResource->cachedImage() : 0; } 48 49 bool setImageSizeForAltText(CachedImage* newImage = 0); 50 51 void updateAltText(); 52 53 HTMLMapElement* imageMap() const; 54 void areaElementFocusChanged(HTMLAreaElement*); 55 56 void highQualityRepaintTimerFired(Timer<RenderImage>*); 57 58 void setIsGeneratedContent(bool generated = true) { m_isGeneratedContent = generated; } 59 60 bool isGeneratedContent() const { return m_isGeneratedContent; } 61 62 String altText() const { return m_altText; } 63 64protected: 65 virtual bool needsPreferredWidthsRecalculation() const; 66 virtual RenderBox* embeddedContentBox() const; 67 virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const; 68 virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const OVERRIDE; 69 70 virtual void styleDidChange(StyleDifference, const RenderStyle*); 71 72 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0); 73 74 virtual void paintIntoRect(GraphicsContext*, const LayoutRect&); 75 virtual void paint(PaintInfo&, const LayoutPoint&); 76 virtual void layout(); 77 78 virtual void intrinsicSizeChanged() 79 { 80 if (m_imageResource) 81 imageChanged(m_imageResource->imagePtr()); 82 } 83 84private: 85 virtual const char* renderName() const { return "RenderImage"; } 86 87 virtual bool isImage() const { return true; } 88 virtual bool isRenderImage() const { return true; } 89 90 virtual void paintReplaced(PaintInfo&, const LayoutPoint&); 91 92 virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE; 93 94 virtual LayoutUnit minimumReplacedHeight() const OVERRIDE; 95 96 virtual void notifyFinished(CachedResource*); 97 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE; 98 99 virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const OVERRIDE; 100 101 IntSize imageSizeForError(CachedImage*) const; 102 void imageDimensionsChanged(bool imageSizeChanged, const IntRect* = 0); 103 bool updateIntrinsicSizeIfNeeded(const LayoutSize&, bool imageSizeChanged); 104 105 void paintAreaElementFocusRing(PaintInfo&); 106 107 // Text to display as long as the image isn't available. 108 String m_altText; 109 OwnPtr<RenderImageResource> m_imageResource; 110 bool m_needsToSetSizeForAltText; 111 bool m_didIncrementVisuallyNonEmptyPixelCount; 112 bool m_isGeneratedContent; 113 114 friend class RenderImageScaleObserver; 115}; 116 117inline RenderImage* toRenderImage(RenderObject* object) 118{ 119 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderImage()); 120 return static_cast<RenderImage*>(object); 121} 122 123inline const RenderImage* toRenderImage(const RenderObject* object) 124{ 125 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderImage()); 126 return static_cast<const RenderImage*>(object); 127} 128 129// This will catch anyone doing an unnecessary cast. 130void toRenderImage(const RenderImage*); 131 132} // namespace WebCore 133 134#endif // RenderImage_h 135