1/* 2 * Copyright (C) 2011, 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef TrackListBase_h 27#define TrackListBase_h 28 29#if ENABLE(VIDEO_TRACK) 30 31#include "EventListener.h" 32#include "EventTarget.h" 33#include "Timer.h" 34#include <wtf/PassRefPtr.h> 35#include <wtf/RefCounted.h> 36#include <wtf/Vector.h> 37 38namespace WebCore { 39 40class HTMLMediaElement; 41class Element; 42class TrackBase; 43 44class TrackListBase : public RefCounted<TrackListBase>, public EventTarget { 45public: 46 ~TrackListBase(); 47 48 virtual unsigned length() const; 49 virtual bool contains(TrackBase*) const; 50 virtual void remove(TrackBase*); 51 52 // EventTarget 53 virtual const AtomicString& interfaceName() const = 0; 54 using RefCounted<TrackListBase>::ref; 55 using RefCounted<TrackListBase>::deref; 56 virtual ScriptExecutionContext* scriptExecutionContext() const { return m_context; } 57 58 DEFINE_ATTRIBUTE_EVENT_LISTENER(addtrack); 59 DEFINE_ATTRIBUTE_EVENT_LISTENER(change); 60 DEFINE_ATTRIBUTE_EVENT_LISTENER(removetrack); 61 62 void clearElement() { m_element = 0; } 63 Element* element() const; 64 HTMLMediaElement* mediaElement() const { return m_element; } 65 66 bool isFiringEventListeners() { return m_dispatchingEvents; } 67 68 // Needs to be public so tracks can call it 69 void scheduleChangeEvent(); 70 71protected: 72 TrackListBase(HTMLMediaElement*, ScriptExecutionContext*); 73 74 void scheduleAddTrackEvent(PassRefPtr<TrackBase>); 75 void scheduleRemoveTrackEvent(PassRefPtr<TrackBase>); 76 77 Vector<RefPtr<TrackBase> > m_inbandTracks; 78 79private: 80 81 // EventTarget 82 virtual void refEventTarget() OVERRIDE { ref(); } 83 virtual void derefEventTarget() OVERRIDE { deref(); } 84 virtual EventTargetData* eventTargetData() OVERRIDE { return &m_eventTargetData; } 85 virtual EventTargetData* ensureEventTargetData() OVERRIDE { return &m_eventTargetData; } 86 87 void asyncEventTimerFired(Timer<TrackListBase>*); 88 89 ScriptExecutionContext* m_context; 90 HTMLMediaElement* m_element; 91 92 Vector<RefPtr<Event> > m_pendingEvents; 93 Timer<TrackListBase> m_pendingEventTimer; 94 95 EventTargetData m_eventTargetData; 96 97 int m_dispatchingEvents; 98}; 99 100} // namespace WebCore 101 102#endif 103#endif 104