Add TrayLocale for locale change notifications.

TBR=ben for ash/ string changes
BUG=124726
TEST=On a device wuth ash-notify enabled in about:flags, change the locale and re-login. Notification should appear. Revert should revert the change after re-login. If ignored, the notification should appear again after re-login. Closing the notification should clear it.

Review URL: https://chromiumcodereview.appspot.com/10391177

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@137700 0039d316-1c4b-4281-b951-d872f2087c98

7 files changed, 218 insertions, 0 deletions

diff --git a/ash/ash.gyp b/ash/ash.gyp
index 67abc8c..856001f 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -132,6 +132,8 @@
         'system/ime/ime_observer.h',
         'system/ime/tray_ime.cc',
         'system/ime/tray_ime.h',
+        'system/locale/tray_locale.cc',
+        'system/locale/tray_locale.h',
         'system/network/network_observer.h',
         'system/network/tray_network.cc',
         'system/network/tray_network.h',
diff --git a/ash/ash_strings.grd b/ash/ash_strings.grd
index 3694fc3..fb6820f 100644
--- a/ash/ash_strings.grd
+++ b/ash/ash_strings.grd
@@ -243,6 +243,12 @@ This file contains the strings for ash.
       <message name="IDS_ASH_STATUS_TRAY_SMS_NUMBER" desc="Sender for SMS messagees in the system tray.">
         SMS from <ph name="PHONE_NUMBER">$1<ex>08700 776655</ex></ph>
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_LOCALE_CHANGE_MESSAGE" desc="The message used for locale change notifications in the system tray.">
+        The language has changed from "<ph name="FROM_LOCALE">$1<ex>Italian</ex></ph>" to "<ph name="TO_LOCALE">$2<ex>English (United States)</ex></ph>" after syncing your settings.
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_LOCALE_REVERT_MESSAGE" desc="Link to revert a change.">
+        Change back to "<ph name="FROM_LOCALE">$1<ex>Italian</ex></ph>" (requires restart)
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_AIRPLANE_MODE" desc="The label used in the network dialog to turn on airplane mode.">
         Airplane mode
       </message>
diff --git a/ash/system/locale/locale_observer.h b/ash/system/locale/locale_observer.h
new file mode 100644
index 0000000..cec29d1
--- /dev/null
+++ b/ash/system/locale/locale_observer.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 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.
+
+#ifndef ASH_SYSTEM_LOCALE_LOCALE_OBSERVER_H_
+#define ASH_SYSTEM_LOCALE_LOCALE_OBSERVER_H_
+#pragma once
+
+#include "ash/ash_export.h"
+
+namespace ash {
+
+class ASH_EXPORT LocaleObserver {
+ public:
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    virtual void AcceptLocaleChange() = 0;
+    virtual void RevertLocaleChange() = 0;
+  };
+
+  virtual ~LocaleObserver() {}
+
+  virtual void OnLocaleChanged(Delegate* delegate,
+                               const std::string& cur_locale,
+                               const std::string& from_locale,
+                               const std::string& to_locale) = 0;
+};
+
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_LOCALE_LOCALE_OBSERVER_H_
diff --git a/ash/system/locale/tray_locale.cc b/ash/system/locale/tray_locale.cc
new file mode 100644
index 0000000..61f80d7
--- /dev/null
+++ b/ash/system/locale/tray_locale.cc
@@ -0,0 +1,115 @@
+// Copyright (c) 2012 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/system/locale/tray_locale.h"
+
+#include "ash/system/tray/tray_views.h"
+#include "base/string16.h"
+#include "grit/ash_strings.h"
+#include "grit/ui_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/views/view.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/controls/link.h"
+#include "ui/views/controls/link_listener.h"
+
+namespace ash {
+namespace internal {
+
+namespace tray {
+
+class LocaleNotificationView : public TrayNotificationView,
+                               public views::LinkListener {
+ public:
+  LocaleNotificationView(TrayLocale* tray,
+                         LocaleObserver::Delegate* delegate,
+                         const std::string& cur_locale,
+                         const std::string& from_locale,
+                         const std::string& to_locale)
+      : tray_(tray),
+        delegate_(delegate) {
+    string16 from = l10n_util::GetDisplayNameForLocale(
+        from_locale, cur_locale, true);
+    string16 to = l10n_util::GetDisplayNameForLocale(
+        to_locale, cur_locale, true);
+
+    views::View* container = new views::View;
+
+    views::Label* message = new views::Label(
+        l10n_util::GetStringFUTF16(
+            IDS_ASH_STATUS_TRAY_LOCALE_CHANGE_MESSAGE, from, to));
+    container->AddChildView(message);
+
+    views::Link* revert = new views::Link(
+        l10n_util::GetStringFUTF16(
+            IDS_ASH_STATUS_TRAY_LOCALE_REVERT_MESSAGE, from));
+    container->AddChildView(revert);
+
+    InitView(container);
+  }
+
+  // Overridden from views::LinkListener.
+  virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE {
+    if (delegate_)
+      delegate_->RevertLocaleChange();
+  }
+
+  // Overridden from TrayNotificationView.
+  virtual void OnClose() OVERRIDE {
+    if (delegate_)
+      delegate_->AcceptLocaleChange();
+    tray_->HideNotificationView();
+  }
+
+ private:
+  TrayLocale* tray_;
+  LocaleObserver::Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(LocaleNotificationView);
+};
+
+
+}  // namespace tray
+
+TrayLocale::TrayLocale()
+    : TrayImageItem(IDR_AURA_UBER_TRAY_LOCALE),
+      notification_(NULL),
+      delegate_(NULL) {
+}
+
+TrayLocale::~TrayLocale() {
+}
+
+bool TrayLocale::GetInitialVisibility() {
+  return notification_ != NULL;
+}
+
+views::View* TrayLocale::CreateNotificationView(user::LoginStatus status) {
+  if (!delegate_)
+    return NULL;
+  CHECK(notification_ == NULL);
+  notification_ = new tray::LocaleNotificationView(
+      this, delegate_, cur_locale_, from_locale_, to_locale_);
+  return notification_;
+}
+
+void TrayLocale::DestroyNotificationView() {
+  notification_ = NULL;
+}
+
+void TrayLocale::OnLocaleChanged(LocaleObserver::Delegate* delegate,
+                                 const std::string& cur_locale,
+                                 const std::string& from_locale,
+                                 const std::string& to_locale) {
+  if (notification_)
+    HideNotificationView();
+  delegate_ = delegate;
+  cur_locale_ = cur_locale;
+  from_locale_ = from_locale;
+  to_locale_ = to_locale;
+  ShowNotificationView();
+}
+
+}  // namespace internal
+}  // namespace ash
diff --git a/ash/system/locale/tray_locale.h b/ash/system/locale/tray_locale.h
new file mode 100644
index 0000000..c0d114c
--- /dev/null
+++ b/ash/system/locale/tray_locale.h
@@ -0,0 +1,52 @@
+// Copyright (c) 2012 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.
+
+#ifndef ASH_SYSTEM_LOCALE_TRAY_LOCALE_H_
+#define ASH_SYSTEM_LOCALE_TRAY_LOCALE_H_
+#pragma once
+
+#include <string>
+
+#include "ash/system/locale/locale_observer.h"
+#include "ash/system/tray/tray_image_item.h"
+
+namespace ash {
+namespace internal {
+
+namespace tray {
+class LocaleNotificationView;
+}
+
+class TrayLocale : public TrayImageItem,
+                   public LocaleObserver {
+ public:
+  TrayLocale();
+  virtual ~TrayLocale();
+
+ private:
+  // Overridden from TrayImageItem.
+  virtual bool GetInitialVisibility() OVERRIDE;
+  virtual views::View* CreateNotificationView(
+      user::LoginStatus status) OVERRIDE;
+  virtual void DestroyNotificationView() OVERRIDE;
+
+  // Overridden from LocaleObserver.
+  virtual void OnLocaleChanged(LocaleObserver::Delegate* delegate,
+                               const std::string& cur_locale,
+                               const std::string& from_locale,
+                               const std::string& to_locale) OVERRIDE;
+
+  tray::LocaleNotificationView* notification_;
+  LocaleObserver::Delegate* delegate_;
+  std::string cur_locale_;
+  std::string from_locale_;
+  std::string to_locale_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayLocale);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_SYSTEM_LOCALE_TRAY_LOCALE_H_
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index ca35312..335c770 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -13,6 +13,7 @@
 #include "ash/system/date/tray_date.h"
 #include "ash/system/drive/tray_drive.h"
 #include "ash/system/ime/tray_ime.h"
+#include "ash/system/locale/tray_locale.h"
 #include "ash/system/network/tray_network.h"
 #include "ash/system/network/tray_sms.h"
 #include "ash/system/power/power_status_observer.h"
@@ -162,6 +163,7 @@ SystemTray::SystemTray()
       clock_observer_(NULL),
       drive_observer_(NULL),
       ime_observer_(NULL),
+      locale_observer_(NULL),
       network_observer_(NULL),
       power_status_observer_(NULL),
       update_observer_(NULL),
@@ -214,6 +216,7 @@ void SystemTray::CreateItems() {
   internal::TrayCapsLock* tray_caps_lock = new internal::TrayCapsLock;
   internal::TrayDrive* tray_drive = new internal::TrayDrive;
   internal::TrayIME* tray_ime = new internal::TrayIME;
+  internal::TrayLocale* tray_locale = new internal::TrayLocale;
   internal::TrayUpdate* tray_update = new internal::TrayUpdate;
 
   accessibility_observer_ = tray_accessibility;
@@ -224,6 +227,7 @@ void SystemTray::CreateItems() {
   clock_observer_ = tray_date;
   drive_observer_ = tray_drive;
   ime_observer_ = tray_ime;
+  locale_observer_ = tray_locale;
   network_observer_ = tray_network;
   power_status_observer_ = tray_power;
   update_observer_ = tray_update;
@@ -236,6 +240,7 @@ void SystemTray::CreateItems() {
   AddTrayItem(tray_sms);
   AddTrayItem(tray_drive);
   AddTrayItem(tray_ime);
+  AddTrayItem(tray_locale);
   AddTrayItem(tray_volume);
   AddTrayItem(tray_brightness);
   AddTrayItem(tray_update);
diff --git a/ash/system/tray/system_tray.h b/ash/system/tray/system_tray.h
index c818b4b..e0dc391 100644
--- a/ash/system/tray/system_tray.h
+++ b/ash/system/tray/system_tray.h
@@ -29,6 +29,7 @@ class CapsLockObserver;
 class ClockObserver;
 class DriveObserver;
 class IMEObserver;
+class LocaleObserver;
 class NetworkObserver;
 class PowerStatusObserver;
 class UpdateObserver;
@@ -129,6 +130,9 @@ class ASH_EXPORT SystemTray : public internal::ActionableView,
   IMEObserver* ime_observer() const {
     return ime_observer_;
   }
+  LocaleObserver* locale_observer() const {
+    return locale_observer_;
+  }
   NetworkObserver* network_observer() const {
     return network_observer_;
   }
@@ -215,6 +219,7 @@ class ASH_EXPORT SystemTray : public internal::ActionableView,
   ClockObserver* clock_observer_;
   DriveObserver* drive_observer_;
   IMEObserver* ime_observer_;
+  LocaleObserver* locale_observer_;
   NetworkObserver* network_observer_;
   PowerStatusObserver* power_status_observer_;
   UpdateObserver* update_observer_;