app_shell: Shut down in response to power button.

extensions/shell/browser/shell_desktop_controller.cc

 // Copyright 2014 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 "extensions/shell/browser/shell_desktop_controller.h"
 
 #include "base/command_line.h"
-#include "content/public/browser/context_factory.h"
 #include "extensions/shell/browser/shell_app_window_controller.h"
 #include "extensions/shell/common/switches.h"
 #include "ui/aura/client/cursor_client.h"
 #include "ui/aura/client/default_capture_client.h"
-#include "ui/aura/env.h"
 #include "ui/aura/layout_manager.h"
 #include "ui/aura/test/test_screen.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/cursor/image_cursors.h"
 #include "ui/base/ime/input_method_initializer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/screen.h"
 #include "ui/wm/core/base_focus_rules.h"
 #include "ui/wm/core/compound_event_filter.h"
 #include "ui/wm/core/cursor_manager.h"
 #include "ui/wm/core/focus_controller.h"
 #include "ui/wm/core/input_method_event_filter.h"
 #include "ui/wm/core/native_cursor_manager.h"
 #include "ui/wm/core/native_cursor_manager_delegate.h"
 #include "ui/wm/core/user_activity_detector.h"
 
 #if defined(OS_CHROMEOS)
+#include "chromeos/dbus/dbus_thread_manager.h"
 #include "ui/chromeos/user_activity_power_manager_notifier.h"
 #include "ui/display/types/chromeos/display_mode.h"
 #include "ui/display/types/chromeos/display_snapshot.h"
 #endif
 
 namespace extensions {
 namespace {
 
 // A simple layout manager that makes each new window fill its parent.
 class FillLayout : public aura::LayoutManager {
@@ skipping 106 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AppsFocusRules);
 };
 
 ShellDesktopController* g_instance = NULL;
 
 }  // namespace
 
 ShellDesktopController::ShellDesktopController() {
+  CHECK(!g_instance) << "ShellDesktopController already exists";
+
 #if defined(OS_CHROMEOS)
+  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+      AddObserver(this);
   display_configurator_.reset(new ui::DisplayConfigurator);
   display_configurator_->Init(false);
   display_configurator_->ForceInitialConfigure(0);
   display_configurator_->AddObserver(this);
 #endif
-  aura::Env::CreateInstance(true);

[oshima, 2014/08/22 21:15:33]

where Create/Delete Instance are called now?

[Daniel Erat, 2014/08/22 21:26:13]

content::BrowserMainLoop::InitializeToolkit() calls CreateInstance(). i'm less
sure where DeleteInstance() is supposed to be called -- i see it in
content::Shell::PlatformExit() and chrome's BrowserProcessImpl::StartTearDown(),
for example. maybe that means that app_shell should call it explicitly from
ShellBrowserMainParts, although having setup and destruction in different
locations is weird.

-  aura::Env::GetInstance()->set_context_factory(content::GetContextFactory());
+
+  CreateRootWindow();
 
   g_instance = this;
 }
 
 ShellDesktopController::~ShellDesktopController() {
   app_window_controller_.reset();
   g_instance = NULL;
   DestroyRootWindow();
-  aura::Env::DeleteInstance();
+#if defined(OS_CHROMEOS)
+  chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+      RemoveObserver(this);
+#endif
 }
 
 // static
 ShellDesktopController* ShellDesktopController::instance() {
   return g_instance;
 }
 
 void ShellDesktopController::SetAppWindowController(
     ShellAppWindowController* app_window_controller) {
   app_window_controller_.reset(app_window_controller);
@@ skipping 15 matching lines @@
 }
 
 aura::Window* ShellDesktopController::GetDefaultParent(
     aura::Window* context,
     aura::Window* window,
     const gfx::Rect& bounds) {
   return host_->window();
 }
 
 #if defined(OS_CHROMEOS)
+void ShellDesktopController::PowerButtonEventReceived(
+    bool down,
+    const base::TimeTicks& timestamp) {
+  if (down) {
+    chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
+        RequestShutdown();
+  }
+}
+
 void ShellDesktopController::OnDisplayModeChanged(
     const std::vector<ui::DisplayConfigurator::DisplayState>& displays) {
   gfx::Size size = GetPrimaryDisplaySize();
   if (!size.IsEmpty())
     host_->UpdateRootWindowSize(size);
 }
 #endif
 
 void ShellDesktopController::OnHostCloseRequested(
     const aura::WindowTreeHost* host) {
   DCHECK_EQ(host_.get(), host);
   CloseAppWindows();
   base::MessageLoop::current()->PostTask(FROM_HERE,
                                          base::MessageLoop::QuitClosure());
 }
 
-void ShellDesktopController::CreateRootWindow() {
-  // Set up basic pieces of ui::wm.
-  gfx::Size size;
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kAppShellHostWindowBounds)) {
-    const std::string size_str =
-        command_line->GetSwitchValueASCII(switches::kAppShellHostWindowBounds);
-    int width, height;
-    CHECK_EQ(2, sscanf(size_str.c_str(), "%dx%d", &width, &height));
-    size = gfx::Size(width, height);
-  } else {
-    size = GetPrimaryDisplaySize();
-  }
-  if (size.IsEmpty())
-    size = gfx::Size(1280, 720);
-
-  test_screen_.reset(aura::TestScreen::Create(size));
-  // TODO(jamescook): Replace this with a real Screen implementation.
-  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen_.get());
-  // TODO(mukai): Set up input method.
-
-  host_.reset(test_screen_->CreateHostForPrimaryDisplay());
-  host_->InitHost();
-  aura::client::SetWindowTreeClient(host_->window(), this);
-  root_window_event_filter_.reset(new wm::CompoundEventFilter);
-  host_->window()->AddPreTargetHandler(root_window_event_filter_.get());
-  InitWindowManager();
-
-  host_->AddObserver(this);
-
-  // Ensure the X window gets mapped.
-  host_->Show();
-}
-
 void ShellDesktopController::InitWindowManager() {
   wm::FocusController* focus_controller =
       new wm::FocusController(CreateFocusRules());
   aura::client::SetFocusClient(host_->window(), focus_controller);
   host_->window()->AddPreTargetHandler(focus_controller);
   aura::client::SetActivationClient(host_->window(), focus_controller);
   focus_client_.reset(focus_controller);
 
   input_method_filter_.reset(
       new wm::InputMethodEventFilter(host_->GetAcceleratedWidget()));
@@ skipping 20 matching lines @@
 #if defined(OS_CHROMEOS)
   user_activity_notifier_.reset(
       new ui::UserActivityPowerManagerNotifier(user_activity_detector_.get()));
 #endif
 }
 
 wm::FocusRules* ShellDesktopController::CreateFocusRules() {
   return new AppsFocusRules();
 }
 
+void ShellDesktopController::CreateRootWindow() {

[Daniel Erat, 2014/08/22 20:41:35]

just moving this now that it's private

+  // Set up basic pieces of ui::wm.
+  gfx::Size size;
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (command_line->HasSwitch(switches::kAppShellHostWindowBounds)) {
+    const std::string size_str =
+        command_line->GetSwitchValueASCII(switches::kAppShellHostWindowBounds);
+    int width, height;
+    CHECK_EQ(2, sscanf(size_str.c_str(), "%dx%d", &width, &height));
+    size = gfx::Size(width, height);
+  } else {
+    size = GetPrimaryDisplaySize();
+  }
+  if (size.IsEmpty())
+    size = gfx::Size(1280, 720);
+
+  test_screen_.reset(aura::TestScreen::Create(size));
+  // TODO(jamescook): Replace this with a real Screen implementation.
+  gfx::Screen::SetScreenInstance(gfx::SCREEN_TYPE_NATIVE, test_screen_.get());
+  // TODO(mukai): Set up input method.
+
+  host_.reset(test_screen_->CreateHostForPrimaryDisplay());
+  host_->InitHost();
+  aura::client::SetWindowTreeClient(host_->window(), this);
+  root_window_event_filter_.reset(new wm::CompoundEventFilter);
+  host_->window()->AddPreTargetHandler(root_window_event_filter_.get());
+  InitWindowManager();
+
+  host_->AddObserver(this);
+
+  // Ensure the X window gets mapped.
+  host_->Show();
+}
+
 void ShellDesktopController::DestroyRootWindow() {
   host_->RemoveObserver(this);
   if (input_method_filter_)
     root_window_event_filter_->RemoveHandler(input_method_filter_.get());
   if (user_activity_detector_) {
     host_->event_processor()->GetRootTarget()->RemovePreTargetHandler(
         user_activity_detector_.get());
   }
   wm::FocusController* focus_controller =
       static_cast<wm::FocusController*>(focus_client_.get());
@@ skipping 20 matching lines @@
   if (displays.empty())
     return gfx::Size();
   const ui::DisplayMode* mode = displays[0].display->current_mode();
   return mode ? mode->size() : gfx::Size();
 #else
   return gfx::Size();
 #endif
 }
 
 }  // namespace extensions