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30 #include "core/dom/ActiveDOMObject.h"
31 #include "core/events/EventListener.h"
32 #include "core/events/EventTarget.h"
33 #include "public/platform/WebMessagePortChannel.h"
34 #include "public/platform/WebMessagePortChannelClient.h"
35 #include "wtf/OwnPtr.h"
36 #include "wtf/PassOwnPtr.h"
37 #include "wtf/PassRefPtr.h"
38 #include "wtf/RefCounted.h"
39 #include "wtf/RefPtr.h"
40 #include "wtf/Vector.h"
41 #include "wtf/WeakPtr.h"
47 class ExecutionContext;
48 class SerializedScriptValue;
50 // The overwhelmingly common case is sending a single port, so handle that efficiently with an inline buffer of size 1.
51 typedef WillBeHeapVector<RefPtrWillBeMember<MessagePort>, 1> MessagePortArray;
53 // Not to be confused with WebMessagePortChannelArray; this one uses Vector and OwnPtr instead of WebVector and raw pointers.
54 typedef Vector<OwnPtr<WebMessagePortChannel>, 1> MessagePortChannelArray;
56 class MessagePort FINAL : public RefCountedWillBeGarbageCollectedFinalized<MessagePort>
57 , public ActiveDOMObject
58 , public EventTargetWithInlineData
59 , public WebMessagePortChannelClient {
60 DEFINE_WRAPPERTYPEINFO();
61 REFCOUNTED_EVENT_TARGET(MessagePort);
62 WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MessagePort);
64 static PassRefPtrWillBeRawPtr<MessagePort> create(ExecutionContext&);
65 virtual ~MessagePort();
67 void postMessage(ExecutionContext*, PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionState&);
72 void entangle(PassOwnPtr<WebMessagePortChannel>);
73 PassOwnPtr<WebMessagePortChannel> disentangle();
75 static PassOwnPtr<WebMessagePortChannelArray> toWebMessagePortChannelArray(PassOwnPtr<MessagePortChannelArray>);
76 static PassOwnPtrWillBeRawPtr<MessagePortArray> toMessagePortArray(ExecutionContext*, const WebMessagePortChannelArray&);
78 // Returns 0 if there is an exception, or if the passed-in array is 0/empty.
79 static PassOwnPtr<MessagePortChannelArray> disentanglePorts(const MessagePortArray*, ExceptionState&);
81 // Returns 0 if the passed array is 0/empty.
82 static PassOwnPtrWillBeRawPtr<MessagePortArray> entanglePorts(ExecutionContext&, PassOwnPtr<MessagePortChannelArray>);
84 bool started() const { return m_started; }
86 virtual const AtomicString& interfaceName() const OVERRIDE;
87 virtual ExecutionContext* executionContext() const OVERRIDE { return ActiveDOMObject::executionContext(); }
88 virtual MessagePort* toMessagePort() OVERRIDE { return this; }
90 // ActiveDOMObject implementation.
91 virtual bool hasPendingActivity() const OVERRIDE;
92 virtual void stop() OVERRIDE { close(); }
94 void setOnmessage(PassRefPtr<EventListener> listener)
96 setAttributeEventListener(EventTypeNames::message, listener);
99 EventListener* onmessage() { return getAttributeEventListener(EventTypeNames::message); }
101 // A port starts out its life entangled, and remains entangled until it is closed or is cloned.
102 bool isEntangled() const { return !m_closed && !isNeutered(); }
104 // A port gets neutered when it is transferred to a new owner via postMessage().
105 bool isNeutered() const { return !m_entangledChannel; }
108 explicit MessagePort(ExecutionContext&);
110 // WebMessagePortChannelClient implementation.
111 virtual void messageAvailable() OVERRIDE;
112 void dispatchMessages();
114 OwnPtr<WebMessagePortChannel> m_entangledChannel;
119 WeakPtrFactory<MessagePort> m_weakFactory;
124 #endif // MessagePort_h