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/*
* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 1999 Antti Koivisto (koivisto@kde.org)
* Copyright (C) 2004, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef ImageLoader_h
#define ImageLoader_h
#include "AtomicString.h"
#include "CachedResourceClient.h"
#include "CachedResourceHandle.h"
namespace WebCore {
class Element;
class ImageLoadEventSender;
class ImageLoader : public CachedResourceClient {
public:
ImageLoader(Element*);
virtual ~ImageLoader();
// This function should be called when the element is attached to a document; starts
// loading if a load hasn't already been started.
void updateFromElement();
// This function should be called whenever the 'src' attribute is set, even if its value
// doesn't change; starts new load unconditionally (matches Firefox and Opera behavior).
void updateFromElementIgnoringPreviousError();
Element* element() const { return m_element; }
bool imageComplete() const { return m_imageComplete; }
CachedImage* image() const { return m_image.get(); }
void setImage(CachedImage*);
void setLoadManually(bool loadManually) { m_loadManually = loadManually; }
bool haveFiredBeforeLoadEvent() const { return m_firedBeforeLoad; }
bool haveFiredLoadEvent() const { return m_firedLoad; }
static void dispatchPendingEvents();
protected:
virtual void notifyFinished(CachedResource*);
private:
virtual void dispatchLoadEvent() = 0;
virtual String sourceURI(const AtomicString&) const = 0;
friend class ImageEventSender;
void dispatchPendingBeforeLoadEvent();
void dispatchPendingLoadEvent();
void setLoadingImage(CachedImage*);
void updateRenderer();
Element* m_element;
CachedResourceHandle<CachedImage> m_image;
AtomicString m_failedLoadURL;
bool m_firedBeforeLoad : 1;
bool m_firedLoad : 1;
bool m_imageComplete : 1;
bool m_loadManually : 1;
};
}
#endif
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