Revert of Remove remote tree host and some related input and metro_driver code

win8/viewer/metro_viewer_process_host.cc

Index: win8/viewer/metro_viewer_process_host.cc
diff --git a/win8/viewer/metro_viewer_process_host.cc b/win8/viewer/metro_viewer_process_host.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a3652410d413a25cefa04ab0e7af970f16f593af
--- /dev/null
+++ b/win8/viewer/metro_viewer_process_host.cc
@@ -0,0 +1,346 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "win8/viewer/metro_viewer_process_host.h"
+
+#include <shlobj.h>
+#include <stdint.h>
+
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/files/file_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/path_service.h"
+#include "base/process/process.h"
+#include "base/strings/string16.h"
+#include "base/synchronization/waitable_event.h"
+#include "base/time/time.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/windows_version.h"
+#include "ipc/ipc_channel_proxy.h"
+#include "ipc/ipc_message.h"
+#include "ipc/ipc_message_macros.h"
+#include "ui/aura/remote_window_tree_host_win.h"
+#include "ui/metro_viewer/metro_viewer_messages.h"
+#include "win8/viewer/metro_viewer_constants.h"
+
+namespace {
+
+const int kViewerProcessConnectionTimeoutSecs = 60;
+
+}  // namespace
+
+namespace win8 {
+
+// static
+MetroViewerProcessHost* MetroViewerProcessHost::instance_ = NULL;
+
+MetroViewerProcessHost::InternalMessageFilter::InternalMessageFilter(
+    MetroViewerProcessHost* owner)
+    : owner_(owner) {
+}
+
+void MetroViewerProcessHost::InternalMessageFilter::OnChannelConnected(
+    int32_t peer_pid) {
+  owner_->NotifyChannelConnected();
+}
+
+MetroViewerProcessHost::InternalMessageFilter::~InternalMessageFilter() {
+}
+
+MetroViewerProcessHost::MetroViewerProcessHost(
+    const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner) {
+  DCHECK(!instance_);
+  instance_ = this;
+
+  channel_ = IPC::ChannelProxy::Create(kMetroViewerIPCChannelName,
+                                       IPC::Channel::MODE_NAMED_SERVER,
+                                       this,
+                                       ipc_task_runner);
+}
+
+MetroViewerProcessHost::~MetroViewerProcessHost() {
+  if (!channel_) {
+    instance_ = NULL;
+    return;
+  }
+
+  base::ProcessId viewer_process_id = GetViewerProcessId();
+  channel_->Close();
+  if (message_filter_.get()) {
+    // Wait for the viewer process to go away.
+    if (viewer_process_id != base::kNullProcessId) {
+      base::Process viewer_process =
+          base::Process::OpenWithAccess(
+              viewer_process_id,
+              PROCESS_QUERY_INFORMATION | SYNCHRONIZE);
+      if (viewer_process.IsValid()) {
+        int exit_code;
+        viewer_process.WaitForExit(&exit_code);
+      }
+    }
+    channel_->RemoveFilter(message_filter_.get());
+  }
+  instance_ = NULL;
+}
+
+base::ProcessId MetroViewerProcessHost::GetViewerProcessId() {
+  if (channel_)
+    return channel_->GetPeerPID();
+  return base::kNullProcessId;
+}
+
+bool MetroViewerProcessHost::LaunchViewerAndWaitForConnection(
+    const base::string16& app_user_model_id) {
+  DCHECK_EQ(base::kNullProcessId, channel_->GetPeerPID());
+
+  channel_connected_event_.reset(new base::WaitableEvent(false, false));
+
+  message_filter_ = new InternalMessageFilter(this);
+  channel_->AddFilter(message_filter_.get());
+
+  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
+    base::win::ScopedComPtr<IApplicationActivationManager> activator;
+    HRESULT hr = activator.CreateInstance(CLSID_ApplicationActivationManager);
+    if (SUCCEEDED(hr)) {
+      DWORD pid = 0;
+      // Use the "connect" verb to
+      hr = activator->ActivateApplication(
+          app_user_model_id.c_str(), kMetroViewerConnectVerb, AO_NONE, &pid);
+    }
+
+    LOG_IF(ERROR, FAILED(hr)) << "Tried and failed to launch Metro Chrome. "
+                              << "hr=" << std::hex << hr;
+  } else {
+    // For Windows 7 we need to launch the viewer ourselves.
+    base::FilePath chrome_path;
+    if (!PathService::Get(base::DIR_EXE, &chrome_path))
+      return false;
+    // TODO(cpu): launch with "-ServerName:DefaultBrowserServer"
+    // note that the viewer might try to launch chrome again.
+    CHECK(false);
+  }
+
+  // Having launched the viewer process, now we wait for it to connect.
+  bool success =
+      channel_connected_event_->TimedWait(base::TimeDelta::FromSeconds(
+          kViewerProcessConnectionTimeoutSecs));
+  channel_connected_event_.reset();
+  return success;
+}
+
+bool MetroViewerProcessHost::Send(IPC::Message* msg) {
+  return channel_->Send(msg);
+}
+
+bool MetroViewerProcessHost::OnMessageReceived(
+    const IPC::Message& message) {
+  DCHECK(CalledOnValidThread());
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(MetroViewerProcessHost, message)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_FileSaveAsDone,
+                        OnFileSaveAsDone)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_FileOpenDone,
+                        OnFileOpenDone)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_MultiFileOpenDone,
+                        OnMultiFileOpenDone)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_OpenURL, OnOpenURL)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SearchRequest, OnHandleSearchRequest)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SelectFolderDone,
+                        OnSelectFolderDone)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_SetTargetSurface, OnSetTargetSurface)
+    IPC_MESSAGE_HANDLER(MetroViewerHostMsg_WindowSizeChanged,
+                        OnWindowSizeChanged)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled ? true :
+      aura::RemoteWindowTreeHostWin::Instance()->OnMessageReceived(message);
+}
+
+// static
+void MetroViewerProcessHost::HandleActivateDesktop(
+    const base::FilePath& path,
+    bool ash_exit) {
+  if (instance_) {
+    instance_->Send(
+        new MetroViewerHostMsg_ActivateDesktop(path, ash_exit));
+  }
+}
+
+// static
+void MetroViewerProcessHost::HandleMetroExit() {
+  if (instance_)
+    instance_->Send(new MetroViewerHostMsg_MetroExit());
+}
+
+// static
+void MetroViewerProcessHost::HandleOpenFile(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    const OpenFileCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  if (instance_) {
+    instance_->HandleOpenFileImpl(title, default_path, filter, on_success,
+                                  on_failure);
+  }
+}
+
+// static
+void MetroViewerProcessHost::HandleOpenMultipleFiles(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    const OpenMultipleFilesCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  if (instance_) {
+    instance_->HandleOpenMultipleFilesImpl(title, default_path, filter,
+                                           on_success, on_failure);
+  }
+}
+
+// static
+void MetroViewerProcessHost::HandleSaveFile(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    int filter_index,
+    const base::string16& default_extension,
+    const SaveFileCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  if (instance_) {
+    instance_->HandleSaveFileImpl(title, default_path, filter, filter_index,
+                                  default_extension, on_success, on_failure);
+  }
+}
+
+// static
+void MetroViewerProcessHost::HandleSelectFolder(
+    const base::string16& title,
+    const SelectFolderCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  if (instance_)
+    instance_->HandleSelectFolderImpl(title, on_success, on_failure);
+}
+
+void MetroViewerProcessHost::HandleOpenFileImpl(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    const OpenFileCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  // Can only have one of these operations in flight.
+  DCHECK(file_open_completion_callback_.is_null());
+  DCHECK(failure_callback_.is_null());
+
+  file_open_completion_callback_ = on_success;
+  failure_callback_ = on_failure;
+
+  Send(new MetroViewerHostMsg_DisplayFileOpen(title, filter, default_path,
+                                              false));
+}
+
+void MetroViewerProcessHost::HandleOpenMultipleFilesImpl(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    const OpenMultipleFilesCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  // Can only have one of these operations in flight.
+  DCHECK(multi_file_open_completion_callback_.is_null());
+  DCHECK(failure_callback_.is_null());
+  multi_file_open_completion_callback_ = on_success;
+  failure_callback_ = on_failure;
+
+  Send(new MetroViewerHostMsg_DisplayFileOpen(title, filter, default_path,
+                                              true));
+}
+
+void MetroViewerProcessHost::HandleSaveFileImpl(
+    const base::string16& title,
+    const base::FilePath& default_path,
+    const base::string16& filter,
+    int filter_index,
+    const base::string16& default_extension,
+    const SaveFileCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  MetroViewerHostMsg_SaveAsDialogParams params;
+  params.title = title;
+  params.default_extension = default_extension;
+  params.filter = filter;
+  params.filter_index = filter_index;
+  params.suggested_name = default_path;
+
+  // Can only have one of these operations in flight.
+  DCHECK(file_saveas_completion_callback_.is_null());
+  DCHECK(failure_callback_.is_null());
+  file_saveas_completion_callback_ = on_success;
+  failure_callback_ = on_failure;
+
+  Send(new MetroViewerHostMsg_DisplayFileSaveAs(params));
+}
+
+void MetroViewerProcessHost::HandleSelectFolderImpl(
+    const base::string16& title,
+    const SelectFolderCompletion& on_success,
+    const FileSelectionCanceled& on_failure) {
+  // Can only have one of these operations in flight.
+  DCHECK(select_folder_completion_callback_.is_null());
+  DCHECK(failure_callback_.is_null());
+  select_folder_completion_callback_ = on_success;
+  failure_callback_ = on_failure;
+
+  Send(new MetroViewerHostMsg_DisplaySelectFolder(title));
+}
+
+void MetroViewerProcessHost::NotifyChannelConnected() {
+  if (channel_connected_event_)
+    channel_connected_event_->Signal();
+}
+
+void MetroViewerProcessHost::OnFileSaveAsDone(bool success,
+                                              const base::FilePath& filename,
+                                              int filter_index) {
+  if (success)
+    file_saveas_completion_callback_.Run(filename, filter_index, NULL);
+  else
+    failure_callback_.Run(NULL);
+  file_saveas_completion_callback_.Reset();
+  failure_callback_.Reset();
+}
+
+
+void MetroViewerProcessHost::OnFileOpenDone(bool success,
+                                            const base::FilePath& filename) {
+  if (success)
+    file_open_completion_callback_.Run(base::FilePath(filename), 0, NULL);
+  else
+    failure_callback_.Run(NULL);
+  file_open_completion_callback_.Reset();
+  failure_callback_.Reset();
+}
+
+void MetroViewerProcessHost::OnMultiFileOpenDone(
+    bool success,
+    const std::vector<base::FilePath>& files) {
+  if (success)
+    multi_file_open_completion_callback_.Run(files, NULL);
+  else
+    failure_callback_.Run(NULL);
+  multi_file_open_completion_callback_.Reset();
+  failure_callback_.Reset();
+}
+
+void MetroViewerProcessHost::OnSelectFolderDone(
+    bool success,
+    const base::FilePath& folder) {
+  if (success)
+    select_folder_completion_callback_.Run(base::FilePath(folder), 0, NULL);
+  else
+    failure_callback_.Run(NULL);
+  select_folder_completion_callback_.Reset();
+  failure_callback_.Reset();
+}
+
+}  // namespace win8