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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "content/renderer/java/java_bridge_channel.h"
      6 
      7 #include "content/child/child_process.h"
      8 #include "content/child/plugin_messages.h"
      9 #include "content/common/java_bridge_messages.h"
     10 #include "third_party/WebKit/public/web/WebBindings.h"
     11 
     12 namespace content {
     13 
     14 JavaBridgeChannel* JavaBridgeChannel::GetJavaBridgeChannel(
     15     const IPC::ChannelHandle& channel_handle,
     16     base::MessageLoopProxy* ipc_message_loop) {
     17   return static_cast<JavaBridgeChannel*>(NPChannelBase::GetChannel(
     18       channel_handle,
     19       IPC::Channel::MODE_CLIENT,
     20       ClassFactory,
     21       ipc_message_loop,
     22       true,
     23       ChildProcess::current()->GetShutDownEvent()));
     24 }
     25 
     26 JavaBridgeChannel::JavaBridgeChannel()
     27     : peer_owner_id_(new struct _NPP) {
     28   // Register the dummy owner Id for our peer (the Browser process) as an object
     29   // owner, and have all objects received from the peer owned by it.
     30   WebKit::WebBindings::registerObjectOwner(peer_owner_id_.get());
     31   SetDefaultNPObjectOwner(peer_owner_id_.get());
     32 }
     33 
     34 JavaBridgeChannel::~JavaBridgeChannel() {
     35   WebKit::WebBindings::unregisterObjectOwner(peer_owner_id_.get());
     36 }
     37 
     38 int JavaBridgeChannel::GenerateRouteID() {
     39   // Use a control message as this going to the JavaBridgeChannelHost, not an
     40   // injected object.
     41   int route_id = MSG_ROUTING_NONE;
     42   Send(new JavaBridgeMsg_GenerateRouteID(&route_id));
     43   // This should never fail, as the JavaBridgeChannelHost should always outlive
     44   // us.
     45   DCHECK_NE(MSG_ROUTING_NONE, route_id);
     46   return route_id;
     47 }
     48 
     49 bool JavaBridgeChannel::OnControlMessageReceived(const IPC::Message& msg) {
     50   // We need to intercept these two message types because the default
     51   // implementation of NPChannelBase::OnControlMessageReceived() is to
     52   // DCHECK(false). However, we don't need to do anything, as we don't need to
     53   // worry about the window system hanging when a modal dialog is displayed.
     54   // This is because, unlike in the case of plugins, the host does not need to
     55   // pump the message queue to avoid hangs.
     56   if (msg.type() == PluginMsg_SignalModalDialogEvent::ID ||
     57       msg.type() == PluginMsg_ResetModalDialogEvent::ID) {
     58     return true;
     59   }
     60   return NPChannelBase::OnControlMessageReceived(msg);
     61 }
     62 
     63 }  // namespace content
     64