1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll (at) kde.org) 3 * (C) 1999 Antti Koivisto (koivisto (at) kde.org) 4 * (C) 2006 Allan Sandfeld Jensen (kde (at) carewolf.com) 5 * (C) 2006 Samuel Weinig (sam.weinig (at) 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 "core/rendering/RenderImageResource.h" 29 #include "core/rendering/RenderReplaced.h" 30 31 namespace WebCore { 32 33 class HTMLAreaElement; 34 class HTMLMapElement; 35 36 class RenderImage : public RenderReplaced { 37 public: 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 ImageResource* cachedImage() const { return m_imageResource ? m_imageResource->cachedImage() : 0; } 48 49 bool setImageSizeForAltText(ImageResource* 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 64 protected: 65 virtual bool needsPreferredWidthsRecalculation() const OVERRIDE FINAL; 66 virtual RenderBox* embeddedContentBox() const OVERRIDE FINAL; 67 virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const OVERRIDE FINAL; 68 69 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE FINAL; 70 71 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0); 72 73 void paintIntoRect(GraphicsContext*, const LayoutRect&); 74 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL; 75 virtual void layout(); 76 77 virtual void intrinsicSizeChanged() 78 { 79 if (m_imageResource) 80 imageChanged(m_imageResource->imagePtr()); 81 } 82 83 private: 84 virtual const char* renderName() const { return "RenderImage"; } 85 86 virtual bool isImage() const { return true; } 87 virtual bool isRenderImage() const OVERRIDE FINAL { return true; } 88 89 virtual void paintReplaced(PaintInfo&, const LayoutPoint&); 90 91 virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const OVERRIDE FINAL; 92 virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE FINAL; 93 94 virtual LayoutUnit minimumReplacedHeight() const OVERRIDE; 95 96 virtual void notifyFinished(Resource*) OVERRIDE FINAL; 97 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE FINAL; 98 99 virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const OVERRIDE FINAL; 100 101 IntSize imageSizeForError(ImageResource*) 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 }; 116 117 inline RenderImage* toRenderImage(RenderObject* object) 118 { 119 ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderImage()); 120 return static_cast<RenderImage*>(object); 121 } 122 123 inline 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. 130 void toRenderImage(const RenderImage*); 131 132 } // namespace WebCore 133 134 #endif // RenderImage_h 135