| /* |
| * Copyright (C) 2008 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 COMPUTER, INC. ``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 COMPUTER, INC. OR |
| * 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 MessagePort_h |
| #define MessagePort_h |
| |
| #include "bindings/v8/ScriptWrappable.h" |
| #include "core/events/EventListener.h" |
| #include "core/events/EventTarget.h" |
| #include "core/dom/MessagePortChannel.h" |
| #include "wtf/Forward.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/PassOwnPtr.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RefPtr.h" |
| #include "wtf/Vector.h" |
| |
| namespace WebCore { |
| |
| class Event; |
| class ExceptionState; |
| class Frame; |
| class MessagePort; |
| class ExecutionContext; |
| |
| // The overwhelmingly common case is sending a single port, so handle that efficiently with an inline buffer of size 1. |
| typedef Vector<RefPtr<MessagePort>, 1> MessagePortArray; |
| |
| class MessagePort : public RefCounted<MessagePort>, public ScriptWrappable, public EventTargetWithInlineData { |
| public: |
| static PassRefPtr<MessagePort> create(ExecutionContext& executionContext) { return adoptRef(new MessagePort(executionContext)); } |
| virtual ~MessagePort(); |
| |
| void postMessage(PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionState&); |
| |
| void start(); |
| void close(); |
| |
| void entangle(PassRefPtr<MessagePortChannel>); |
| PassRefPtr<MessagePortChannel> disentangle(); |
| |
| // Returns 0 if there is an exception, or if the passed-in array is 0/empty. |
| static PassOwnPtr<MessagePortChannelArray> disentanglePorts(const MessagePortArray*, ExceptionState&); |
| |
| // Returns 0 if the passed array is 0/empty. |
| static PassOwnPtr<MessagePortArray> entanglePorts(ExecutionContext&, PassOwnPtr<MessagePortChannelArray>); |
| |
| void messageAvailable(); |
| bool started() const { return m_started; } |
| |
| void contextDestroyed(); |
| |
| virtual const AtomicString& interfaceName() const OVERRIDE; |
| virtual ExecutionContext* executionContext() const OVERRIDE; |
| MessagePort* toMessagePort() OVERRIDE { return this; } |
| |
| void dispatchMessages(); |
| |
| using RefCounted<MessagePort>::ref; |
| using RefCounted<MessagePort>::deref; |
| |
| bool hasPendingActivity(); |
| |
| void setOnmessage(PassRefPtr<EventListener> listener, DOMWrapperWorld* world) |
| { |
| setAttributeEventListener(EventTypeNames::message, listener, world); |
| start(); |
| } |
| EventListener* onmessage(DOMWrapperWorld* world) { return getAttributeEventListener(EventTypeNames::message, world); } |
| |
| // A port starts out its life entangled, and remains entangled until it is closed or is cloned. |
| bool isEntangled() { return !m_closed && !isNeutered(); } |
| |
| // A port gets neutered when it is transferred to a new owner via postMessage(). |
| bool isNeutered() { return !m_entangledChannel; } |
| |
| private: |
| explicit MessagePort(ExecutionContext&); |
| |
| virtual void refEventTarget() OVERRIDE { ref(); } |
| virtual void derefEventTarget() OVERRIDE { deref(); } |
| |
| RefPtr<MessagePortChannel> m_entangledChannel; |
| |
| bool m_started; |
| bool m_closed; |
| |
| ExecutionContext* m_executionContext; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // MessagePort_h |