Creates notifications for display resolution change.

ash/display/resolution_notification_controller.cc

Index: ash/display/resolution_notification_controller.cc
diff --git a/ash/display/resolution_notification_controller.cc b/ash/display/resolution_notification_controller.cc
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index 0000000000000000000000000000000000000000..a765d610fec89b826d06f220c872d7decebfa538
--- /dev/null
+++ b/ash/display/resolution_notification_controller.cc
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+// Copyright 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 "ash/display/resolution_notification_controller.h"
+
+#include "ash/display/display_controller.h"
+#include "ash/display/display_manager.h"
+#include "ash/shell.h"
+#include "base/strings/utf_string_conversions.h"
+#include "grit/ash_resources.h"
+#include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/time_format.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/display.h"
+#include "ui/gfx/screen.h"
+#include "ui/message_center/message_center.h"
+#include "ui/message_center/notification.h"
+#include "ui/message_center/notification_delegate.h"
+
+using message_center::Notification;
+
+namespace ash {
+namespace internal {
+namespace {
+
+bool g_use_timer = true;
+
+class ResolutionChangeNotificationDelegate
+    : public message_center::NotificationDelegate {
+ public:
+  ResolutionChangeNotificationDelegate(
+      ResolutionNotificationController* controller,
+      bool has_timeout);
+
+ protected:
+  virtual ~ResolutionChangeNotificationDelegate();
+
+ private:
+  // message_center::NotificationDelegate overrides:
+  virtual void Display() OVERRIDE;
+  virtual void Error() OVERRIDE;
+  virtual void Close(bool by_user) OVERRIDE;
+  virtual void Click() OVERRIDE;
+  virtual bool HasClickedListener() OVERRIDE;
+  virtual void ButtonClick(int button_index) OVERRIDE;
+
+  ResolutionNotificationController* controller_;
+  bool has_timeout_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResolutionChangeNotificationDelegate);
+};
+
+ResolutionChangeNotificationDelegate::ResolutionChangeNotificationDelegate(
+    ResolutionNotificationController* controller,
+    bool has_timeout)
+    : controller_(controller),
+      has_timeout_(has_timeout) {
+  DCHECK(controller_);
+}
+
+ResolutionChangeNotificationDelegate::~ResolutionChangeNotificationDelegate() {
+}
+
+void ResolutionChangeNotificationDelegate::Display() {
+}
+
+void ResolutionChangeNotificationDelegate::Error() {
+}
+
+void ResolutionChangeNotificationDelegate::Close(bool by_user) {
+  if (by_user)
+    controller_->AcceptResolutionChange();
+}
+
+void ResolutionChangeNotificationDelegate::Click() {
+  controller_->AcceptResolutionChange();
+}
+
+bool ResolutionChangeNotificationDelegate::HasClickedListener() {
+  return true;
+}
+
+void ResolutionChangeNotificationDelegate::ButtonClick(int button_index) {
+  // If there's the timeout, the first button is "Accept". Otherwise the
+  // button click should be "Revert".
+  if (has_timeout_ && button_index == 0)
+    controller_->AcceptResolutionChange();
+  else
+    controller_->RevertResolutionChange();
+}
+
+}  // namespace
+
+// static
+const int ResolutionNotificationController::kTimeoutInSec = 15;
+
+// static
+const char ResolutionNotificationController::kNotificationId[] =
+    "chrome://settings/display/resolution";
+
+struct ResolutionNotificationController::ResolutionChangeInfo {
+  ResolutionChangeInfo(int64 display_id,
+                       const gfx::Size& old_resolution,
+                       const gfx::Size& new_resolution,
+                       const base::Closure& accept_callback);
+  ~ResolutionChangeInfo();
+
+  // The id of the display where the resolution change happens.
+  int64 display_id;
+
+  // The resolution before the change.
+  gfx::Size old_resolution;
+
+  // The new resolution after the change.
+  gfx::Size new_resolution;
+
+  // The callback when accept is chosen.
+  base::Closure accept_callback;
+
+  // The remaining timeout in seconds. 0 if the change does not time out.
+  uint8 timeout_count;
+
+  // The timer to invoke OnTimerTick() every second. This cannot be
+  // OneShotTimer since the message contains text "automatically closed in xx
+  // seconds..." which has to be updated every second.
+  base::RepeatingTimer<ResolutionNotificationController> timer;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ResolutionChangeInfo);
+};
+
+ResolutionNotificationController::ResolutionChangeInfo::ResolutionChangeInfo(
+    int64 display_id,
+    const gfx::Size& old_resolution,
+    const gfx::Size& new_resolution,
+    const base::Closure& accept_callback)
+    : display_id(display_id),
+      old_resolution(old_resolution),
+      new_resolution(new_resolution),
+      accept_callback(accept_callback),
+      timeout_count(0) {
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  if (!display_manager->HasInternalDisplay() &&
+      display_manager->num_connected_displays() == 1u) {
+    timeout_count = kTimeoutInSec;
+  }
+}
+
+ResolutionNotificationController::ResolutionChangeInfo::
+    ~ResolutionChangeInfo() {
+}
+
+ResolutionNotificationController::ResolutionNotificationController() {
+  Shell::GetInstance()->display_controller()->AddObserver(this);
+  Shell::GetScreen()->AddObserver(this);
+}
+
+ResolutionNotificationController::~ResolutionNotificationController() {
+  Shell::GetInstance()->display_controller()->RemoveObserver(this);
+  Shell::GetScreen()->RemoveObserver(this);
+}
+
+void ResolutionNotificationController::SetDisplayResolutionAndNotify(
+    int64 display_id,
+    const gfx::Size& old_resolution,
+    const gfx::Size& new_resolution,
+    const base::Closure& accept_callback) {
+  // If multiple resolution changes are invoked for the same display,
+  // the original resolution for the first resolution change has to be used
+  // instead of the specified |old_resolution|.
+  gfx::Size original_resolution;
+  if (change_info_ && change_info_->display_id == display_id) {
+    DCHECK(change_info_->new_resolution == old_resolution);
+    original_resolution = change_info_->old_resolution;
+  }
+
+  change_info_.reset(new ResolutionChangeInfo(
+      display_id, old_resolution, new_resolution, accept_callback));
+  if (!original_resolution.IsEmpty())
+    change_info_->old_resolution = original_resolution;
+
+  // SetDisplayResolution() causes OnConfigurationChanged() and the notification
+  // will be shown at that point.
+  Shell::GetInstance()->display_manager()->SetDisplayResolution(
+      display_id, new_resolution);
+}
+
+bool ResolutionNotificationController::DoesNotificationTimeout() {
+  return change_info_ && change_info_->timeout_count > 0;
+}
+
+void ResolutionNotificationController::CreateOrUpdateNotification() {
+  message_center::MessageCenter* message_center =
+      message_center::MessageCenter::Get();
+  if (!change_info_) {
+    message_center->RemoveNotification(kNotificationId, false /* by_user */);
+    return;
+  }
+
+  base::string16 timeout_message;
+  message_center::RichNotificationData data;
+  if (change_info_->timeout_count > 0) {
+    data.buttons.push_back(message_center::ButtonInfo(
+        l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_RESOLUTION_CHANGE_ACCEPT)));
+    timeout_message = l10n_util::GetStringFUTF16(
+        IDS_ASH_DISPLAY_RESOLUTION_TIMEOUT,
+        ui::TimeFormat::TimeDurationLong(
+            base::TimeDelta::FromSeconds(change_info_->timeout_count)));
+  }
+  data.buttons.push_back(message_center::ButtonInfo(
+        l10n_util::GetStringUTF16(IDS_ASH_DISPLAY_RESOLUTION_CHANGE_REVERT)));
+
+  ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
+  scoped_ptr<Notification> notification(new Notification(
+      message_center::NOTIFICATION_TYPE_SIMPLE,
+      kNotificationId,
+      l10n_util::GetStringFUTF16(
+          IDS_ASH_STATUS_TRAY_DISPLAY_RESOLUTION_CHANGED,
+          UTF8ToUTF16(Shell::GetInstance()->display_manager()->
+              GetDisplayNameForId(change_info_->display_id)),
+          UTF8ToUTF16(change_info_->new_resolution.ToString())),
+      timeout_message,
+      bundle.GetImageNamed(IDR_AURA_UBER_TRAY_DISPLAY),
+      base::string16() /* display_source */,
+      std::string() /* extension_id */,
+      data,
+      new ResolutionChangeNotificationDelegate(
+          this, change_info_->timeout_count > 0)));
+  notification->SetSystemPriority();
+  message_center->AddNotification(notification.Pass());
+}
+
+void ResolutionNotificationController::OnTimerTick() {
+  if (!change_info_)
+    return;
+
+  --change_info_->timeout_count;
+  if (change_info_->timeout_count == 0)
+    RevertResolutionChange();
+  else
+    CreateOrUpdateNotification();
+}
+
+void ResolutionNotificationController::AcceptResolutionChange() {
+  message_center::MessageCenter::Get()->RemoveNotification(
+      kNotificationId, false /* by_user */);
+  base::Closure callback = change_info_->accept_callback;
+  change_info_.reset();
+  callback.Run();
+}
+
+void ResolutionNotificationController::RevertResolutionChange() {
+  message_center::MessageCenter::Get()->RemoveNotification(
+      kNotificationId, false /* by_user */);
+  int64 display_id = change_info_->display_id;
+  gfx::Size old_resolution = change_info_->old_resolution;
+  change_info_.reset();
+  Shell::GetInstance()->display_manager()->SetDisplayResolution(
+      display_id, old_resolution);
+}
+
+void ResolutionNotificationController::OnDisplayBoundsChanged(
+    const gfx::Display& display) {
+}
+
+void ResolutionNotificationController::OnDisplayAdded(
+    const gfx::Display& new_display) {
+}
+
+void ResolutionNotificationController::OnDisplayRemoved(
+    const gfx::Display& old_display) {
+  if (change_info_ && change_info_->display_id == old_display.id())
+    RevertResolutionChange();
+}
+
+void ResolutionNotificationController::OnDisplayConfigurationChanged() {
+  if (!change_info_)
+    return;
+
+  CreateOrUpdateNotification();
+  if (g_use_timer && change_info_->timeout_count > 0) {
+    change_info_->timer.Start(FROM_HERE,
+                              base::TimeDelta::FromSeconds(1),
+                              this,
+                              &ResolutionNotificationController::OnTimerTick);
+  }
+}
+
+void ResolutionNotificationController::SuppressTimerForTest() {
+  g_use_timer = false;
+}
+
+}  // namespace internal
+}  // namespace ash