WebCore/RenderImage.h

   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 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 "CachedImage.h"
  29 #include "CachedResourceHandle.h"
  30 #include "RenderReplaced.h"
  31
  32 namespace WebCore {
  33
  34 class HTMLMapElement;
  35
  36 class RenderImage : public RenderReplaced {
  37 public:
  38     RenderImage(Node*);
  39     virtual ~RenderImage();
  40
  41     virtual const char* renderName() const { return "RenderImage"; }
  42
  43     virtual bool isImage() const { return true; }
  44     virtual bool isRenderImage() const { return true; }
  45
  46     virtual void paintReplaced(PaintInfo& paintInfo, int tx, int ty);
  47
  48     virtual int minimumReplacedHeight() const;
  49
  50     virtual void imageChanged(WrappedImagePtr, const IntRect* = 0);
  51     virtual void notifyFinished(CachedResource*);
  52
  53     bool setImageSizeForAltText(CachedImage* newImage = 0);
  54
  55     void updateAltText();
  56
  57     void setCachedImage(CachedImage*);
  58     CachedImage* cachedImage() const { return m_cachedImage.get(); }
  59
  60     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
  61
  62     virtual int calcReplacedWidth(bool includeMaxWidth = true) const;
  63     virtual int calcReplacedHeight() const;
  64
  65     virtual void calcPrefWidths();
  66
  67     HTMLMapElement* imageMap();
  68
  69     void resetAnimation();
  70
  71     virtual bool hasImage() const { return m_cachedImage; }
  72
  73     void highQualityRepaintTimerFired(Timer<RenderImage>*);
  74
  75     virtual void collectSelectionRects(Vector<SelectionRect>&, unsigned, unsigned);
  76
  77 protected:
  78     virtual Image* image(int /*w*/ = 0, int /*h*/ = 0) { return m_cachedImage ? m_cachedImage->image() : nullImage(); }
  79     virtual bool errorOccurred() const { return m_cachedImage && m_cachedImage->errorOccurred(); }
  80     virtual bool usesImageContainerSize() const { return m_cachedImage ? m_cachedImage->usesImageContainerSize() : false; }
  81     virtual void setImageContainerSize(const IntSize& size) const { if (m_cachedImage) m_cachedImage->setImageContainerSize(size); }
  82     virtual bool imageHasRelativeWidth() const { return m_cachedImage ? m_cachedImage->imageHasRelativeWidth() : false; }
  83     virtual bool imageHasRelativeHeight() const { return m_cachedImage ? m_cachedImage->imageHasRelativeHeight() : false; }
  84     virtual IntSize imageSize(float multiplier) const { return m_cachedImage ? m_cachedImage->imageSize(multiplier) : IntSize(); }
  85     virtual WrappedImagePtr imagePtr() const { return m_cachedImage.get(); }
  86
  87     virtual void intrinsicSizeChanged() { imageChanged(imagePtr()); }
  88
  89 private:
  90     int calcAspectRatioWidth() const;
  91     int calcAspectRatioHeight() const;
  92
  93     bool isWidthSpecified() const;
  94     bool isHeightSpecified() const;
  95
  96 protected:
  97     // The image we are rendering.
  98     CachedResourceHandle<CachedImage> m_cachedImage;
  99
 100     // Text to display as long as the image isn't available.
 101     String m_altText;
 102
 103     static Image* nullImage();
 104
 105     friend class RenderImageScaleObserver;
 106 };
 107
 108 } // namespace WebCore
 109
 110 #endif // RenderImage_h