// 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_STATUS_AREA_WIDGET_H_
#define ASH_SYSTEM_STATUS_AREA_WIDGET_H_

#include "ash/ash_export.h"
#include "ash/launcher/background_animator.h"
#include "ash/system/user/login_status.h"
#include "ash/wm/shelf_types.h"
#include "ui/views/widget/widget.h"

namespace ash {

class ShellDelegate;
class SystemTray;
class SystemTrayDelegate;
class WebNotificationTray;

namespace internal {

class StatusAreaWidgetDelegate;

class ASH_EXPORT StatusAreaWidget : public views::Widget {
 public:
  StatusAreaWidget();
  virtual ~StatusAreaWidget();

  // Creates the SystemTray and the WebNotificationTray.
  void CreateTrayViews(ShellDelegate* shell_delegate);

  // Destroys the system tray and web notification tray. Called before
  // tearing down the windows to avoid shutdown ordering issues.
  void Shutdown();

  // Update the alignment of the widget and tray views.
  void SetShelfAlignment(ShelfAlignment alignment);

  // Update whether to paint a background for each tray view.
  void SetPaintsBackground(
      bool value,
      internal::BackgroundAnimator::ChangeType change_type);

  // Hide any non system (i.e. web) notifications.
  void HideNonSystemNotifications();

  // Toggle the visibility of system notifications.
  void SetHideSystemNotifications(bool hide);

  // Returns true if it is OK to show a non system notification.
  bool ShouldShowNonSystemNotifications();

  // Called by the client when the login status changes. Caches login_status
  // and calls UpdateAfterLoginStatusChange for the system tray and the web
  // notification tray.
  void UpdateAfterLoginStatusChange(user::LoginStatus login_status);

  // Called whenever the launcher auto-hide behavior may need updating.
  // This sets should_show_launcher_ and calls
  // ShelfLayoutManager::UpdateAutoHideState() if the state has changed.
  void UpdateShouldShowLauncher();

  internal::StatusAreaWidgetDelegate* status_area_widget_delegate() {
    return status_area_widget_delegate_;
  }
  SystemTray* system_tray() { return system_tray_; }
  SystemTrayDelegate* system_tray_delegate() {
    return system_tray_delegate_.get();
  }
  WebNotificationTray* web_notification_tray() {
    return web_notification_tray_;
  }

  user::LoginStatus login_status() const { return login_status_; }

  bool should_show_launcher() const { return should_show_launcher_; }

 private:
  void AddSystemTray(ShellDelegate* shell_delegate);
  void AddWebNotificationTray();

  scoped_ptr<SystemTrayDelegate> system_tray_delegate_;
  // Weak pointers to View classes that are parented to StatusAreaWidget:
  internal::StatusAreaWidgetDelegate* status_area_widget_delegate_;
  SystemTray* system_tray_;
  WebNotificationTray* web_notification_tray_;
  user::LoginStatus login_status_;
  bool should_show_launcher_;

  DISALLOW_COPY_AND_ASSIGN(StatusAreaWidget);
};

}  // namespace internal
}  // namespace ash

#endif  // ASH_SYSTEM_STATUS_AREA_WIDGET_H_