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 "CachedResourceClient.h" 27 #include "CachedResourceHandle.h" 28 #include <wtf/text/AtomicString.h> 29 30 namespace WebCore { 31 32 class Element; 33 class ImageLoadEventSender; 34 class RenderImageResource; 35 36 class ImageLoader : public CachedResourceClient { 37 public: 38 ImageLoader(Element*); 39 virtual ~ImageLoader(); 40 41 // This function should be called when the element is attached to a document; starts 42 // loading if a load hasn't already been started. 43 void updateFromElement(); 44 45 // This function should be called whenever the 'src' attribute is set, even if its value 46 // doesn't change; starts new load unconditionally (matches Firefox and Opera behavior). 47 void updateFromElementIgnoringPreviousError(); 48 49 void elementWillMoveToNewOwnerDocument(); 50 element()51 Element* element() const { return m_element; } imageComplete()52 bool imageComplete() const { return m_imageComplete; } 53 image()54 CachedImage* image() const { return m_image.get(); } 55 void setImage(CachedImage*); // Cancels pending beforeload and load events, and doesn't dispatch new ones. 56 setLoadManually(bool loadManually)57 void setLoadManually(bool loadManually) { m_loadManually = loadManually; } 58 haveFiredBeforeLoadEvent()59 bool haveFiredBeforeLoadEvent() const { return m_firedBeforeLoad; } haveFiredLoadEvent()60 bool haveFiredLoadEvent() const { return m_firedLoad; } 61 62 static void dispatchPendingBeforeLoadEvents(); 63 static void dispatchPendingLoadEvents(); 64 65 protected: 66 virtual void notifyFinished(CachedResource*); 67 68 private: 69 virtual void dispatchLoadEvent() = 0; 70 virtual String sourceURI(const AtomicString&) const = 0; 71 72 friend class ImageEventSender; 73 void dispatchPendingBeforeLoadEvent(); 74 void dispatchPendingLoadEvent(); 75 76 RenderImageResource* renderImageResource(); 77 void updateRenderer(); 78 79 Element* m_element; 80 CachedResourceHandle<CachedImage> m_image; 81 AtomicString m_failedLoadURL; 82 bool m_firedBeforeLoad : 1; 83 bool m_firedLoad : 1; 84 bool m_imageComplete : 1; 85 bool m_loadManually : 1; 86 }; 87 88 } 89 90 #endif 91