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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 
31 namespace WebCore {
32 
33 class HTMLAreaElement;
34 class HTMLMapElement;
35 
36 class RenderImage : public RenderReplaced {
37 public:
38     RenderImage(Node*);
39     virtual ~RenderImage();
40 
41     void setImageResource(PassOwnPtr<RenderImageResource>);
42 
imageResource()43     RenderImageResource* imageResource() { return m_imageResource.get(); }
imageResource()44     const RenderImageResource* imageResource() const { return m_imageResource.get(); }
cachedImage()45     CachedImage* cachedImage() const { return m_imageResource ? m_imageResource->cachedImage() : 0; }
46 
47     bool setImageSizeForAltText(CachedImage* newImage = 0);
48 
49     void updateAltText();
50 
51     HTMLMapElement* imageMap() const;
52     void areaElementFocusChanged(HTMLAreaElement*);
53 
54     void highQualityRepaintTimerFired(Timer<RenderImage>*);
55 
56 protected:
57     virtual void styleDidChange(StyleDifference, const RenderStyle*);
58 
59     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
60 
61     virtual void paintIntoRect(GraphicsContext*, const IntRect&);
62     virtual void paint(PaintInfo&, int tx, int ty);
63 
64     bool isLogicalWidthSpecified() const;
65     bool isLogicalHeightSpecified() const;
66 
intrinsicSizeChanged()67     virtual void intrinsicSizeChanged()
68     {
69         if (m_imageResource)
70             imageChanged(m_imageResource->imagePtr());
71     }
72 
73 private:
renderName()74     virtual const char* renderName() const { return "RenderImage"; }
75 
isImage()76     virtual bool isImage() const { return true; }
isRenderImage()77     virtual bool isRenderImage() const { return true; }
78 
79     virtual void paintReplaced(PaintInfo&, int tx, int ty);
80 
81     virtual int minimumReplacedHeight() const;
82 
83     virtual void notifyFinished(CachedResource*);
84     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
85 
86     virtual int computeReplacedLogicalWidth(bool includeMaxWidth = true) const;
87     virtual int computeReplacedLogicalHeight() const;
88 
89     IntSize imageSizeForError(CachedImage*) const;
90     void imageDimensionsChanged(bool imageSizeChanged, const IntRect* = 0);
91 
92     int calcAspectRatioLogicalWidth() const;
93     int calcAspectRatioLogicalHeight() const;
94 
95     void paintAreaElementFocusRing(PaintInfo&);
96 
97     // Text to display as long as the image isn't available.
98     String m_altText;
99     OwnPtr<RenderImageResource> m_imageResource;
100     bool m_needsToSetSizeForAltText;
101 
102     friend class RenderImageScaleObserver;
103 };
104 
toRenderImage(RenderObject * object)105 inline RenderImage* toRenderImage(RenderObject* object)
106 {
107     ASSERT(!object || object->isRenderImage());
108     return static_cast<RenderImage*>(object);
109 }
110 
toRenderImage(const RenderObject * object)111 inline const RenderImage* toRenderImage(const RenderObject* object)
112 {
113     ASSERT(!object || object->isRenderImage());
114     return static_cast<const RenderImage*>(object);
115 }
116 
117 // This will catch anyone doing an unnecessary cast.
118 void toRenderImage(const RenderImage*);
119 
120 } // namespace WebCore
121 
122 #endif // RenderImage_h
123