1 /* 2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org) 3 * (C) 1999 Antti Koivisto (koivisto@kde.org) 4 * Copyright (C) 2004, 2009 Apple Inc. All rights reserved. 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 class ImageLoadEventSender; 34 35 class ImageLoader : public CachedResourceClient { 36 public: 37 ImageLoader(Element*); 38 virtual ~ImageLoader(); 39 40 // This function should be called when the element is attached to a document; starts 41 // loading if a load hasn't already been started. 42 void updateFromElement(); 43 44 // This function should be called whenever the 'src' attribute is set, even if its value 45 // doesn't change; starts new load unconditionally (matches Firefox and Opera behavior). 46 void updateFromElementIgnoringPreviousError(); 47 element()48 Element* element() const { return m_element; } imageComplete()49 bool imageComplete() const { return m_imageComplete; } 50 image()51 CachedImage* image() const { return m_image.get(); } 52 void setImage(CachedImage*); 53 setLoadManually(bool loadManually)54 void setLoadManually(bool loadManually) { m_loadManually = loadManually; } 55 haveFiredLoadEvent()56 bool haveFiredLoadEvent() const { return m_firedLoad; } 57 58 static void dispatchPendingLoadEvents(); 59 60 protected: 61 virtual void notifyFinished(CachedResource*); 62 63 private: 64 virtual void dispatchLoadEvent() = 0; 65 virtual String sourceURI(const AtomicString&) const = 0; 66 67 friend class ImageLoadEventSender; 68 void dispatchPendingLoadEvent(); 69 70 void setLoadingImage(CachedImage*); 71 72 Element* m_element; 73 CachedResourceHandle<CachedImage> m_image; 74 AtomicString m_failedLoadURL; 75 bool m_firedLoad : 1; 76 bool m_imageComplete : 1; 77 bool m_loadManually : 1; 78 }; 79 80 } 81 82 #endif 83