C++ PluginControllerProxy类代码示例

void WebProcessConnection::didReceiveSyncMessage(CoreIPC::Connection* connection, CoreIPC::MessageDecoder& decoder, std::unique_ptr<CoreIPC::MessageEncoder>& replyEncoder)
{
    // Force all timers to run at full speed when processing a synchronous message
    ActivityAssertion activityAssertion(PluginProcess::shared());

    ConnectionStack::CurrentConnectionPusher currentConnection(ConnectionStack::shared(), connection);

    uint64_t destinationID = decoder.destinationID();

    if (!destinationID) {
        didReceiveSyncWebProcessConnectionMessage(connection, decoder, replyEncoder);
        return;
    }

    if (decoder.messageReceiverName() == Messages::NPObjectMessageReceiver::messageReceiverName()) {
        m_npRemoteObjectMap->didReceiveSyncMessage(connection, decoder, replyEncoder);
        return;
    }

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(decoder.destinationID());
    if (!pluginControllerProxy)
        return;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());
    pluginControllerProxy->didReceiveSyncPluginControllerProxyMessage(connection, decoder, replyEncoder);
}

void WebProcessConnection::didReceiveMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
{
    if (!arguments->destinationID()) {
        ASSERT_NOT_REACHED();
        return;
    }

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(arguments->destinationID());
    if (!pluginControllerProxy)
        return;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());

    pluginControllerProxy->didReceivePluginControllerProxyMessage(connection, messageID, arguments);
}

void WebProcessConnection::createPlugin(uint64_t pluginInstanceID, const Plugin::Parameters& parameters, const String& userAgent, bool isPrivateBrowsingEnabled, bool isAcceleratedCompositingEnabled, bool& result, uint32_t& remoteLayerClientID)
{
    OwnPtr<PluginControllerProxy> pluginControllerProxy = PluginControllerProxy::create(this, pluginInstanceID, userAgent, isPrivateBrowsingEnabled, isAcceleratedCompositingEnabled);

    PluginControllerProxy* pluginControllerProxyPtr = pluginControllerProxy.get();

    // Make sure to add the proxy to the map before initializing it, since the plug-in might call out to the web process from 
    // its NPP_New function. This will hand over ownership of the proxy to the web process connection.
    addPluginControllerProxy(pluginControllerProxy.release());

    // Now try to initialize the plug-in.
    result = pluginControllerProxyPtr->initialize(parameters);

    if (!result)
        return;

    remoteLayerClientID = pluginControllerProxyPtr->remoteLayerClientID();
}

CoreIPC::SyncReplyMode WebProcessConnection::didReceiveSyncMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments, CoreIPC::ArgumentEncoder* reply)
{
    uint64_t destinationID = arguments->destinationID();

    if (!destinationID)
        return didReceiveSyncWebProcessConnectionMessage(connection, messageID, arguments, reply);

    if (messageID.is<CoreIPC::MessageClassNPObjectMessageReceiver>())
        return m_npRemoteObjectMap->didReceiveSyncMessage(connection, messageID, arguments, reply);

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(arguments->destinationID());
    if (!pluginControllerProxy)
        return CoreIPC::AutomaticReply;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());
    CoreIPC::SyncReplyMode replyMode = pluginControllerProxy->didReceiveSyncPluginControllerProxyMessage(connection, messageID, arguments, reply);

    return replyMode;
}

void WebProcessConnection::createPluginAsynchronously(const PluginCreationParameters& creationParameters)
{
    // In the time since this plugin was requested asynchronously we might have created it synchronously or destroyed it.
    // In either of those cases we need to ignore this creation request.
    if (m_asynchronousInstanceIDsToIgnore.contains(creationParameters.pluginInstanceID)) {
        m_asynchronousInstanceIDsToIgnore.remove(creationParameters.pluginInstanceID);
        return;
    }
    
    // This version of CreatePlugin is only used by plug-ins that are known to behave when started asynchronously.
    bool result = false;
    bool wantsWheelEvents = false;
    uint32_t remoteLayerClientID = 0;
    
    if (creationParameters.artificialPluginInitializationDelayEnabled) {
        unsigned artificialPluginInitializationDelay = 5;
        sleep(artificialPluginInitializationDelay);
    }

    // Since plug-in creation can often message to the WebProcess synchronously (with NPP_Evaluate for example)
    // we need to make sure that the web process will handle the plug-in process's synchronous messages,
    // even if the web process is waiting on a synchronous reply itself.
    // Normally the plug-in process doesn't give its synchronous messages the special flag to allow for that.
    // We can force it to do so by incrementing the "DispatchMessageMarkedDispatchWhenWaitingForSyncReply" count.
    m_connection->incrementDispatchMessageMarkedDispatchWhenWaitingForSyncReplyCount();

    // The call to createPluginInternal can potentially cause the plug-in to be destroyed and
    // thus free the WebProcessConnection object. Protect it.
    Ref<WebProcessConnection> protect(*this);
    createPluginInternal(creationParameters, result, wantsWheelEvents, remoteLayerClientID);

    if (!m_connection) {
        // createPluginInternal caused the connection to go away.
        return;
    }

    m_connection->decrementDispatchMessageMarkedDispatchWhenWaitingForSyncReplyCount();

    // If someone asked for this plug-in synchronously while it was in the middle of being created then we need perform the
    // synchronous reply instead of sending the asynchronous reply.
    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(creationParameters.pluginInstanceID);
    ASSERT(pluginControllerProxy);
    if (RefPtr<Messages::WebProcessConnection::CreatePlugin::DelayedReply> delayedSyncReply = pluginControllerProxy->takeInitializationReply()) {
        delayedSyncReply->send(result, wantsWheelEvents, remoteLayerClientID);
        return;
    }

    // Otherwise, send the asynchronous results now.
    if (!result) {
        m_connection->sendSync(Messages::PluginProxy::DidFailToCreatePlugin(), Messages::PluginProxy::DidFailToCreatePlugin::Reply(), creationParameters.pluginInstanceID);
        return;
    }

    m_connection->sendSync(Messages::PluginProxy::DidCreatePlugin(wantsWheelEvents, remoteLayerClientID), Messages::PluginProxy::DidCreatePlugin::Reply(), creationParameters.pluginInstanceID);
}

void WebProcessConnection::didReceiveMessage(CoreIPC::Connection* connection, CoreIPC::MessageID messageID, CoreIPC::ArgumentDecoder* arguments)
{
    ConnectionStack::CurrentConnectionPusher currentConnection(connectionStack(), connection);

    if (messageID.is<CoreIPC::MessageClassWebProcessConnection>()) {
        didReceiveWebProcessConnectionMessage(connection, messageID, arguments);
        return;
    }

    if (!arguments->destinationID()) {
        ASSERT_NOT_REACHED();
        return;
    }

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(arguments->destinationID());
    if (!pluginControllerProxy)
        return;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());
    pluginControllerProxy->didReceivePluginControllerProxyMessage(connection, messageID, arguments);
}

void WebProcessConnection::didReceiveMessage(CoreIPC::Connection* connection, CoreIPC::MessageDecoder& decoder)
{
    ConnectionStack::CurrentConnectionPusher currentConnection(ConnectionStack::shared(), connection);

    if (decoder.messageReceiverName() == Messages::WebProcessConnection::messageReceiverName()) {
        didReceiveWebProcessConnectionMessage(connection, decoder);
        return;
    }

    if (!decoder.destinationID()) {
        ASSERT_NOT_REACHED();
        return;
    }

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(decoder.destinationID());
    if (!pluginControllerProxy)
        return;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());
    pluginControllerProxy->didReceivePluginControllerProxyMessage(connection, decoder);
}

void WebProcessConnection::didReceiveMessage(IPC::Connection& connection, IPC::Decoder& decoder)
{
    TemporaryChange<IPC::Connection*> currentConnectionChange(currentConnection, &connection);

    if (decoder.messageReceiverName() == Messages::WebProcessConnection::messageReceiverName()) {
        didReceiveWebProcessConnectionMessage(connection, decoder);
        return;
    }

    if (!decoder.destinationID()) {
        ASSERT_NOT_REACHED();
        return;
    }

    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(decoder.destinationID());
    if (!pluginControllerProxy)
        return;

    PluginController::PluginDestructionProtector protector(pluginControllerProxy->asPluginController());
    pluginControllerProxy->didReceivePluginControllerProxyMessage(connection, decoder);
}

void WebProcessConnection::createPlugin(const PluginCreationParameters& creationParameters, PassRefPtr<Messages::WebProcessConnection::CreatePlugin::DelayedReply> reply)
{
    PluginControllerProxy* pluginControllerProxy = m_pluginControllers.get(creationParameters.pluginInstanceID);

    // The controller proxy for the plug-in we're being asked to create synchronously might already exist if it was requested asynchronously before.
    if (pluginControllerProxy) {
        // It might still be in the middle of initialization in which case we have to let that initialization complete and respond to this message later.
        if (pluginControllerProxy->isInitializing()) {
            pluginControllerProxy->setInitializationReply(reply);
            return;
        }
        
        // If its initialization is complete then we need to respond to this message with the correct information about its creation.
#if PLATFORM(MAC)
        reply->send(true, pluginControllerProxy->wantsWheelEvents(), pluginControllerProxy->remoteLayerClientID());
#else
        reply->send(true, pluginControllerProxy->wantsWheelEvents(), 0);
#endif
        return;
    }
    
    // The plugin we're supposed to create might have been requested asynchronously before.
    // In that case we need to create it synchronously now but flag the instance ID so we don't recreate it asynchronously later.
    if (creationParameters.asynchronousCreationIncomplete)
        m_asynchronousInstanceIDsToIgnore.add(creationParameters.pluginInstanceID);
    
    bool result = false;
    bool wantsWheelEvents = false;
    uint32_t remoteLayerClientID = 0;
    createPluginInternal(creationParameters, result, wantsWheelEvents, remoteLayerClientID);
    
    reply->send(result, wantsWheelEvents, remoteLayerClientID);
}

void WebProcessConnection::createPluginInternal(const PluginCreationParameters& creationParameters, bool& result, bool& wantsWheelEvents, uint32_t& remoteLayerClientID)
{
    OwnPtr<PluginControllerProxy> pluginControllerProxy = PluginControllerProxy::create(this, creationParameters);

    PluginControllerProxy* pluginControllerProxyPtr = pluginControllerProxy.get();

    // Make sure to add the proxy to the map before initializing it, since the plug-in might call out to the web process from 
    // its NPP_New function. This will hand over ownership of the proxy to the web process connection.
    addPluginControllerProxy(pluginControllerProxy.release());

    // Now try to initialize the plug-in.
    result = pluginControllerProxyPtr->initialize(creationParameters);

    if (!result)
        return;

    wantsWheelEvents = pluginControllerProxyPtr->wantsWheelEvents();
#if PLATFORM(MAC)
    remoteLayerClientID = pluginControllerProxyPtr->remoteLayerClientID();
#else
    UNUSED_PARAM(remoteLayerClientID);
#endif
}