WebCore/StyleImage.h

   1 /*
   2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
   3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
   4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
   5  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Library General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Library General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Library General Public License
  18  * along with this library; see the file COPYING.LIB.  If not, write to
  19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301, USA.
  21  *
  22  */
  23
  24 #ifndef StyleImage_h
  25 #define StyleImage_h
  26
  27 #include "IntSize.h"
  28 #include <wtf/PassRefPtr.h>
  29 #include <wtf/RefCounted.h>
  30 #include <wtf/RefPtr.h>
  31
  32 namespace WebCore {
  33
  34 class CSSValue;
  35 class Image;
  36 class RenderObject;
  37
  38 typedef void* WrappedImagePtr;
  39
  40 class StyleImage : public RefCounted<StyleImage> {
  41 public:
  42     virtual ~StyleImage() { }
  43
  44     bool operator==(const StyleImage& other)
  45     {
  46         return data() == other.data();
  47     }
  48
  49     virtual PassRefPtr<CSSValue> cssValue() = 0;
  50
  51     virtual bool canRender(float /*multiplier*/) const { return true; }
  52     virtual bool isLoaded() const { return true; }
  53     virtual bool errorOccurred() const { return false; }
  54     virtual IntSize imageSize(const RenderObject*, float multiplier) const = 0;
  55     virtual bool imageHasRelativeWidth() const = 0;
  56     virtual bool imageHasRelativeHeight() const = 0;
  57     virtual bool usesImageContainerSize() const = 0;
  58     virtual void setImageContainerSize(const IntSize&) = 0;
  59     virtual void addClient(RenderObject*) = 0;
  60     virtual void removeClient(RenderObject*) = 0;
  61     virtual Image* image(RenderObject*, const IntSize&) const = 0;
  62     virtual WrappedImagePtr data() const = 0;
  63     virtual bool isCachedImage() const { return false; }
  64     virtual bool isGeneratedImage() const { return false; }
  65
  66     static  bool imagesEquivalent(StyleImage* image1, StyleImage* image2)
  67     {
  68         if (image1 != image2) {
  69             if (!image1 || !image2)
  70                 return false;
  71             return *image1 == *image2;
  72         }
  73         return true;
  74     }
  75
  76 protected:
  77     StyleImage() { }
  78 };
  79
  80 }
  81 #endif