#if ENABLE(FONT_LOAD_EVENTS)
#ifndef FontLoader_h
#define FontLoader_h
#include "ActiveDOMObject.h"
#include "EventListener.h"
#include "EventTarget.h"
#include "Timer.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 FontCascade;
class LoadFontCallback;
class ScriptExecutionContext;
class FontLoader final : public RefCounted<FontLoader>, public ActiveDOMObject, public EventTarget {
public:
static Ref<FontLoader> create(Document* document)
{
return adoptRef<FontLoader>(*new FontLoader(document));
}
virtual ~FontLoader();
bool checkFont(const String&, const String&);
void loadFont(const Dictionary&);
void loadFontDone(const LoadFontCallback&);
void notifyWhenFontsReady(PassRefPtr<VoidCallback>);
bool loading() const { return m_numLoadingFromCSS > 0 || m_numLoadingFromJS > 0; }
virtual ScriptExecutionContext* scriptExecutionContext() const override;
virtual EventTargetInterface eventTargetInterface() const override;
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() override { ref(); }
virtual void derefEventTarget() override { deref(); }
virtual EventTargetData* eventTargetData() override;
virtual EventTargetData& ensureEventTargetData() override;
const char* activeDOMObjectName() const override;
bool canSuspendForPageCache() const override;
void pendingEventsTimerFired() { firePendingEvents(); }
void scheduleEvent(PassRefPtr<Event>);
void firePendingEvents();
bool resolveFontStyle(const String&, FontCascade&);
Document* m_document;
EventTargetData m_eventTargetData;
unsigned m_numLoadingFromCSS;
unsigned m_numLoadingFromJS;
Vector<RefPtr<Event>> m_pendingEvents;
Vector<RefPtr<VoidCallback>> m_callbacks;
RefPtr<Event> m_loadingDoneEvent;
Timer m_pendingEventsTimer;
};
}
#endif // FontLoader_h
#endif // ENABLE(FONT_LOAD_EVENTS)