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/*
* Copyright (C) 2013 Apple 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.
*/
#ifndef MediaKeySession_h
#define MediaKeySession_h
#include "bindings/core/v8/ScriptPromiseProperty.h"
#include "core/dom/ActiveDOMObject.h"
#include "core/dom/DOMArrayPiece.h"
#include "core/dom/DOMException.h"
#include "modules/EventTargetModules.h"
#include "platform/Timer.h"
#include "platform/heap/Handle.h"
#include "public/platform/WebContentDecryptionModuleSession.h"
namespace blink {
class GenericEventQueue;
class MediaKeys;
// References are held by JS only. However, even if all JS references are
// dropped, it won't be garbage collected until close event received or
// MediaKeys goes away (as determined by the validity of a WeakPtr). This allows
// the CDM to continue to fire events for this session, as long as the session
// is open.
//
// WeakPtr<MediaKeys> is used instead of having MediaKeys and MediaKeySession
// keep references to each other, and then having to inform the other object
// when it gets destroyed.
//
// Because this object controls the lifetime of the WebContentDecryptionModuleSession,
// it may outlive any JavaScript references as long as the MediaKeys object is alive.
// The WebContentDecryptionModuleSession has the same lifetime as this object.
class MediaKeySession final
: public RefCountedGarbageCollectedEventTargetWithInlineData<MediaKeySession>
, public ActiveDOMObject
, private WebContentDecryptionModuleSession::Client {
DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MediaKeySession>);
DEFINE_WRAPPERTYPEINFO();
WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaKeySession);
public:
static MediaKeySession* create(ScriptState*, MediaKeys*, const String& sessionType);
static bool isValidSessionType(const String& sessionType);
virtual ~MediaKeySession();
String sessionId() const;
double expiration() const { return m_expiration; }
ScriptPromise closed(ScriptState*);
ScriptPromise generateRequest(ScriptState*, const String& initDataType, const DOMArrayPiece& initData);
ScriptPromise load(ScriptState*, const String& sessionId);
ScriptPromise update(ScriptState*, const DOMArrayPiece& response);
ScriptPromise close(ScriptState*);
ScriptPromise remove(ScriptState*);
void enqueueEvent(PassRefPtrWillBeRawPtr<Event>);
// EventTarget
virtual const AtomicString& interfaceName() const override;
virtual ExecutionContext* executionContext() const override;
// ActiveDOMObject
virtual bool hasPendingActivity() const override;
virtual void stop() override;
virtual void trace(Visitor*) override;
private:
class PendingAction;
friend class NewSessionResultPromise;
friend class LoadSessionResultPromise;
MediaKeySession(ScriptState*, MediaKeys*, const String& sessionType);
void actionTimerFired(Timer<MediaKeySession>*);
// WebContentDecryptionModuleSession::Client
virtual void message(MessageType, const unsigned char* message, size_t messageLength) override;
virtual void message(const unsigned char* message, size_t messageLength, const WebURL& destinationURL) override;
virtual void close() override;
virtual void expirationChanged(double updatedExpiryTimeInMS) override;
// Called by NewSessionResult when the new session has been created.
void finishGenerateRequest();
// Called by LoadSessionResult when the session has been loaded.
void finishLoad();
String m_keySystem;
OwnPtrWillBeMember<GenericEventQueue> m_asyncEventQueue;
OwnPtr<WebContentDecryptionModuleSession> m_session;
// Used to determine if MediaKeys is still active.
WeakMember<MediaKeys> m_mediaKeys;
// Session properties.
String m_sessionType;
double m_expiration;
// Session states.
bool m_isUninitialized;
bool m_isCallable;
bool m_isClosed; // Is the CDM finished with this session?
// Keep track of the closed promise.
typedef ScriptPromiseProperty<Member<MediaKeySession>, ToV8UndefinedGenerator, RefPtrWillBeMember<DOMException> > ClosedPromise;
Member<ClosedPromise> m_closedPromise;
HeapDeque<Member<PendingAction> > m_pendingActions;
Timer<MediaKeySession> m_actionTimer;
};
} // namespace blink
#endif // MediaKeySession_h
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