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 inline void setImageDevicePixelRatio(float factor) { m_imageDevicePixelRatio = factor; } 65 float imageDevicePixelRatio() const { return m_imageDevicePixelRatio; } 66 67 protected: 68 virtual bool needsPreferredWidthsRecalculation() const OVERRIDE FINAL; 69 virtual RenderBox* embeddedContentBox() const OVERRIDE FINAL; 70 virtual void computeIntrinsicRatioInformation(FloatSize& intrinsicSize, double& intrinsicRatio, bool& isPercentageIntrinsicSize) const OVERRIDE FINAL; 71 72 virtual void styleDidChange(StyleDifference, const RenderStyle*) OVERRIDE FINAL; 73 74 virtual void imageChanged(WrappedImagePtr, const IntRect* = 0); 75 76 void paintIntoRect(GraphicsContext*, const LayoutRect&); 77 virtual void paint(PaintInfo&, const LayoutPoint&) OVERRIDE FINAL; 78 virtual void layout(); 79 virtual void didLayout(ResourceLoadPriorityOptimizer&); 80 virtual void didScroll(ResourceLoadPriorityOptimizer&); 81 void updateImageLoadingPriority(ResourceLoadPriorityOptimizer&); 82 83 virtual void intrinsicSizeChanged() 84 { 85 if (m_imageResource) 86 imageChanged(m_imageResource->imagePtr()); 87 } 88 89 private: 90 virtual const char* renderName() const { return "RenderImage"; } 91 92 virtual bool isImage() const { return true; } 93 virtual bool isRenderImage() const OVERRIDE FINAL { return true; } 94 95 virtual void paintReplaced(PaintInfo&, const LayoutPoint&); 96 97 virtual bool foregroundIsKnownToBeOpaqueInRect(const LayoutRect& localRect, unsigned maxDepthToTest) const OVERRIDE FINAL; 98 virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE FINAL; 99 100 virtual LayoutUnit minimumReplacedHeight() const OVERRIDE; 101 102 virtual void notifyFinished(Resource*) OVERRIDE FINAL; 103 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE FINAL; 104 105 virtual bool boxShadowShouldBeAppliedToBackground(BackgroundBleedAvoidance, InlineFlowBox*) const OVERRIDE FINAL; 106 107 IntSize imageSizeForError(ImageResource*) const; 108 void imageDimensionsChanged(bool imageSizeChanged, const IntRect* = 0); 109 bool updateIntrinsicSizeIfNeeded(const LayoutSize&, bool imageSizeChanged); 110 // Update the size of the image to be rendered. Object-fit may cause this to be different from the CSS box's content rect. 111 void updateInnerContentRect(); 112 113 void paintAreaElementFocusRing(PaintInfo&); 114 115 // Text to display as long as the image isn't available. 116 String m_altText; 117 OwnPtr<RenderImageResource> m_imageResource; 118 bool m_needsToSetSizeForAltText; 119 bool m_didIncrementVisuallyNonEmptyPixelCount; 120 bool m_isGeneratedContent; 121 float m_imageDevicePixelRatio; 122 123 friend class RenderImageScaleObserver; 124 }; 125 126 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderImage, isRenderImage()); 127 128 } // namespace WebCore 129 130 #endif // RenderImage_h 131
