content/renderer/java/java_bridge_channel.cc

   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/common/child_process.h"
   8 #include "content/common/java_bridge_messages.h"
   9 #include "content/common/plugin_messages.h"
  10
  11 namespace content {
  12
  13 JavaBridgeChannel* JavaBridgeChannel::GetJavaBridgeChannel(
  14     const IPC::ChannelHandle& channel_handle,
  15     base::MessageLoopProxy* ipc_message_loop) {
  16   return static_cast<JavaBridgeChannel*>(NPChannelBase::GetChannel(
  17       channel_handle,
  18       IPC::Channel::MODE_CLIENT,
  19       ClassFactory,
  20       ipc_message_loop,
  21       true,
  22       ChildProcess::current()->GetShutDownEvent()));
  23 }
  24
  25 JavaBridgeChannel::JavaBridgeChannel() {
  26 }
  27
  28 JavaBridgeChannel::~JavaBridgeChannel() {
  29 }
  30
  31 int JavaBridgeChannel::GenerateRouteID() {
  32   // Use a control message as this going to the JavaBridgeChannelHost, not an
  33   // injected object.
  34   int route_id = MSG_ROUTING_NONE;
  35   Send(new JavaBridgeMsg_GenerateRouteID(&route_id));
  36   // This should never fail, as the JavaBridgeChannelHost should always outlive
  37   // us.
  38   DCHECK_NE(MSG_ROUTING_NONE, route_id);
  39   return route_id;
  40 }
  41
  42 bool JavaBridgeChannel::OnControlMessageReceived(const IPC::Message& msg) {
  43   // We need to intercept these two message types because the default
  44   // implementation of NPChannelBase::OnControlMessageReceived() is to
  45   // DCHECK(false). However, we don't need to do anything, as we don't need to
  46   // worry about the window system hanging when a modal dialog is displayed.
  47   // This is because, unlike in the case of plugins, the host does not need to
  48   // pump the message queue to avoid hangs.
  49   if (msg.type() == PluginMsg_SignalModalDialogEvent::ID ||
  50       msg.type() == PluginMsg_ResetModalDialogEvent::ID) {
  51     return true;
  52   }
  53   return NPChannelBase::OnControlMessageReceived(msg);
  54 }
  55
  56 }  // namespace content