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      1 // Copyright (c) 2013 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 "win8/viewer/metro_viewer_process_host.h"
      6 
      7 #include <shlobj.h>
      8 
      9 #include "base/command_line.h"
     10 #include "base/file_util.h"
     11 #include "base/files/file_path.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "base/process/process.h"
     14 #include "base/strings/string16.h"
     15 #include "base/synchronization/waitable_event.h"
     16 #include "base/time/time.h"
     17 #include "base/win/scoped_comptr.h"
     18 #include "ipc/ipc_message.h"
     19 #include "ipc/ipc_message_macros.h"
     20 #include "ui/aura/remote_root_window_host_win.h"
     21 #include "ui/metro_viewer/metro_viewer_messages.h"
     22 #include "win8/viewer/metro_viewer_constants.h"
     23 
     24 namespace win8 {
     25 
     26 MetroViewerProcessHost::InternalMessageFilter::InternalMessageFilter(
     27     MetroViewerProcessHost* owner) : owner_(owner) {
     28 }
     29 
     30 void MetroViewerProcessHost::InternalMessageFilter::OnChannelConnected(
     31     int32 /* peer_pid */) {
     32   owner_->NotifyChannelConnected();
     33 }
     34 
     35 MetroViewerProcessHost::MetroViewerProcessHost(
     36     base::SingleThreadTaskRunner* ipc_task_runner) {
     37 
     38   channel_.reset(new IPC::ChannelProxy(
     39       kMetroViewerIPCChannelName,
     40       IPC::Channel::MODE_NAMED_SERVER,
     41       this,
     42       ipc_task_runner));
     43 }
     44 
     45 MetroViewerProcessHost::~MetroViewerProcessHost() {
     46 }
     47 
     48 base::ProcessId MetroViewerProcessHost::GetViewerProcessId() {
     49   if (channel_)
     50     return channel_->peer_pid();
     51   return base::kNullProcessId;
     52 }
     53 
     54 bool MetroViewerProcessHost::LaunchViewerAndWaitForConnection(
     55     const base::string16& app_user_model_id) {
     56   DCHECK_EQ(base::kNullProcessId, channel_->peer_pid());
     57 
     58   channel_connected_event_.reset(new base::WaitableEvent(false, false));
     59 
     60   scoped_refptr<InternalMessageFilter> message_filter(
     61       new InternalMessageFilter(this));
     62   channel_->AddFilter(message_filter);
     63 
     64   base::win::ScopedComPtr<IApplicationActivationManager> activator;
     65   HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
     66   if (SUCCEEDED(hr)) {
     67     DWORD pid = 0;
     68     // Use the "connect" verb to
     69     hr = activator->ActivateApplication(
     70         app_user_model_id.c_str(), kMetroViewerConnectVerb, AO_NONE, &pid);
     71   }
     72 
     73   LOG_IF(ERROR, FAILED(hr)) << "Tried and failed to launch Metro Chrome. "
     74                             << "hr=" << std::hex << hr;
     75 
     76   // Having launched the viewer process, now we wait for it to connect.
     77   bool success =
     78       channel_connected_event_->TimedWait(base::TimeDelta::FromSeconds(60));
     79   channel_connected_event_.reset();
     80 
     81   // |message_filter| is only used to signal |channel_connected_event_| above
     82   // and can thus be removed after |channel_connected_event_| is no longer
     83   // waiting.
     84   channel_->RemoveFilter(message_filter);
     85   return success;
     86 }
     87 
     88 bool MetroViewerProcessHost::Send(IPC::Message* msg) {
     89   return channel_->Send(msg);
     90 }
     91 
     92 bool MetroViewerProcessHost::OnMessageReceived(
     93     const IPC::Message& message) {
     94   DCHECK(CalledOnValidThread());
     95   bool handled = true;
     96   IPC_BEGIN_MESSAGE_MAP(MetroViewerProcessHost, message)
     97     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SetTargetSurface, OnSetTargetSurface)
     98     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_OpenURL, OnOpenURL)
     99     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SearchRequest, OnHandleSearchRequest)
    100     IPC_MESSAGE_HANDLER(MetroViewerHostMsg_WindowSizeChanged,
    101                         OnWindowSizeChanged)
    102     IPC_MESSAGE_UNHANDLED(handled = false)
    103   IPC_END_MESSAGE_MAP()
    104   return handled ? true :
    105       aura::RemoteRootWindowHostWin::Instance()->OnMessageReceived(message);
    106 }
    107 
    108 void MetroViewerProcessHost::NotifyChannelConnected() {
    109   if (channel_connected_event_)
    110     channel_connected_event_->Signal();
    111 }
    112 
    113 }  // namespace win8
    114