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/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   blink::WebBindings::registerObjectOwner(peer_owner_id_.get());
  31   SetDefaultNPObjectOwner(peer_owner_id_.get());
  32 }
  33
  34 JavaBridgeChannel::~JavaBridgeChannel() {
  35   blink::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