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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#if ENABLE(FONT_LOAD_EVENTS)
#ifndef FontLoader_h
#define FontLoader_h
#include "ActiveDOMObject.h"
#include "EventListener.h"
#include "EventNames.h"
#include "EventTarget.h"
#include "VoidCallback.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
namespace WebCore {
class CachedFont;
class CSSFontFaceRule;
class CSSFontFaceSource;
class Dictionary;
class Document;
class Event;
class Font;
class ScriptExecutionContext;
class FontLoader : public RefCounted<FontLoader>, public ActiveDOMObject, public EventTarget {
public:
static PassRefPtr<FontLoader> create(Document* document)
{
return adoptRef<FontLoader>(new FontLoader(document));
}
virtual ~FontLoader();
DEFINE_ATTRIBUTE_EVENT_LISTENER(loading);
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadingdone);
DEFINE_ATTRIBUTE_EVENT_LISTENER(loadstart);
DEFINE_ATTRIBUTE_EVENT_LISTENER(load);
DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
bool checkFont(const String&, const String&);
void loadFont(const Dictionary&);
void notifyWhenFontsReady(PassRefPtr<VoidCallback>);
bool loading() const { return m_loadingCount > 0; }
virtual ScriptExecutionContext* scriptExecutionContext() const;
virtual const AtomicString& interfaceName() const;
using RefCounted<FontLoader>::ref;
using RefCounted<FontLoader>::deref;
Document* document() const { return m_document; }
void didLayout();
void beginFontLoading(CSSFontFaceRule*);
void fontLoaded(CSSFontFaceRule*);
void loadError(CSSFontFaceRule*, CSSFontFaceSource*);
void loadingDone();
private:
FontLoader(Document*);
virtual void refEventTarget() { ref(); }
virtual void derefEventTarget() { deref(); }
virtual EventTargetData* eventTargetData();
virtual EventTargetData* ensureEventTargetData();
void scheduleEvent(PassRefPtr<Event>);
void firePendingEvents();
bool resolveFontStyle(const String&, Font&);
Document* m_document;
EventTargetData m_eventTargetData;
unsigned m_loadingCount;
Vector<RefPtr<Event> > m_pendingEvents;
Vector<RefPtr<VoidCallback> > m_callbacks;
RefPtr<Event> m_loadingDoneEvent;
};
} // namespace WebCore
#endif // FontLoader_h
#endif // ENABLE(FONT_LOAD_EVENTS)
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