WebCore/ImageLoader.h

   1 /*
   2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
   3  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
   4  * Copyright (C) 2004 Apple Computer, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public License
  17  * along with this library; see the file COPYING.LIB.  If not, write to
  18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #ifndef ImageLoader_h
  24 #define ImageLoader_h
  25
  26 #include "AtomicString.h"
  27 #include "CachedResourceClient.h"
  28 #include "CachedResourceHandle.h"
  29
  30 namespace WebCore {
  31
  32 class Element;
  33
  34 class ImageLoader : public CachedResourceClient {
  35 public:
  36     ImageLoader(Element*);
  37     virtual ~ImageLoader();
  38
  39     void updateFromElement();
  40
  41     // This method should be called after the 'src' attribute
  42     // is set (even when it is not modified) to force the update
  43     // and match Firefox and Opera.
  44     void updateFromElementIgnoringPreviousError();
  45
  46     virtual void dispatchLoadEvent() = 0;
  47     virtual String sourceURI(const AtomicString&) const = 0;
  48
  49     Element* element() const { return m_element; }
  50     bool imageComplete() const { return m_imageComplete; }
  51
  52     CachedImage* image() const { return m_image.get(); }
  53     void setImage(CachedImage*);
  54
  55     void setLoadManually(bool loadManually) { m_loadManually = loadManually; }
  56
  57     // CachedResourceClient API
  58     virtual void notifyFinished(CachedResource*);
  59
  60     virtual bool memoryLimitReached();
  61
  62     bool haveFiredLoadEvent() const { return m_firedLoad; }
  63 protected:
  64     void setLoadingImage(CachedImage*);
  65
  66     void setHaveFiredLoadEvent(bool firedLoad) { m_firedLoad = firedLoad; }
  67
  68 private:
  69     Element* m_element;
  70     CachedResourceHandle<CachedImage> m_image;
  71     AtomicString m_failedLoadURL;
  72     bool m_firedLoad : 1;
  73     bool m_imageComplete : 1;
  74     bool m_loadManually : 1;
  75 };
  76
  77 }
  78
  79 #endif