Add TrayLocale for locale change notifications.

ash/system/locale/tray_locale.cc

Index: ash/system/locale/tray_locale.cc
diff --git a/ash/system/locale/tray_locale.cc b/ash/system/locale/tray_locale.cc
new file mode 100644
index 0000000000000000000000000000000000000000..61f80d7d87a108833effaf97a22d406b43e6b4d7
--- /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