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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
      6 #define ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
      7 
      8 #include "ash/system/chromeos/power/power_status.h"
      9 #include "ash/system/tray/system_tray_item.h"
     10 
     11 class SkBitmap;
     12 
     13 namespace gfx {
     14 class Image;
     15 class ImageSkia;
     16 }
     17 
     18 namespace message_center {
     19 class MessageCenter;
     20 }
     21 
     22 namespace ash {
     23 namespace tray {
     24 class PowerNotificationView;
     25 class PowerTrayView;
     26 }
     27 
     28 class ASH_EXPORT TrayPower : public SystemTrayItem,
     29                              public PowerStatus::Observer {
     30  public:
     31   // Visible for testing.
     32   enum NotificationState {
     33     NOTIFICATION_NONE,
     34 
     35     // Low battery charge.
     36     NOTIFICATION_LOW_POWER,
     37 
     38     // Critically low battery charge.
     39     NOTIFICATION_CRITICAL,
     40   };
     41 
     42   // Time-based notification thresholds when on battery power.
     43   static const int kCriticalMinutes;
     44   static const int kLowPowerMinutes;
     45   static const int kNoWarningMinutes;
     46 
     47   // Percentage-based notification thresholds when using a low-power charger.
     48   static const int kCriticalPercentage;
     49   static const int kLowPowerPercentage;
     50   static const int kNoWarningPercentage;
     51 
     52   TrayPower(SystemTray* system_tray,
     53             message_center::MessageCenter* message_center);
     54   virtual ~TrayPower();
     55 
     56  private:
     57   friend class TrayPowerTest;
     58 
     59   // This enum is used for histogram. The existing values should not be removed,
     60   // and the new values should be added just before CHARGER_TYPE_COUNT.
     61   enum ChargerType{
     62     UNKNOWN_CHARGER,
     63     MAINS_CHARGER,
     64     USB_CHARGER,
     65     UNCONFIRMED_SPRING_CHARGER,
     66     SAFE_SPRING_CHARGER,
     67     CHARGER_TYPE_COUNT,
     68   };
     69 
     70   // Overridden from SystemTrayItem.
     71   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
     72   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
     73   virtual views::View* CreateNotificationView(
     74       user::LoginStatus status) OVERRIDE;
     75   virtual void DestroyTrayView() OVERRIDE;
     76   virtual void DestroyDefaultView() OVERRIDE;
     77   virtual void DestroyNotificationView() OVERRIDE;
     78   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status) OVERRIDE;
     79   virtual void UpdateAfterShelfAlignmentChange(
     80       ShelfAlignment alignment) OVERRIDE;
     81 
     82   // Overridden from PowerStatus::Observer.
     83   virtual void OnPowerStatusChanged() OVERRIDE;
     84 
     85   // Show a notification that a low-power USB charger has been connected.
     86   // Returns true if a notification was shown or explicitly hidden.
     87   bool MaybeShowUsbChargerNotification();
     88 
     89   // Sets |notification_state_|. Returns true if a notification should be shown.
     90   bool UpdateNotificationState();
     91   bool UpdateNotificationStateForRemainingTime();
     92   bool UpdateNotificationStateForRemainingPercentage();
     93 
     94   // Records the charger type in UMA.
     95   void RecordChargerType();
     96 
     97   message_center::MessageCenter* message_center_;  // Not owned.
     98   tray::PowerTrayView* power_tray_;
     99   tray::PowerNotificationView* notification_view_;
    100   NotificationState notification_state_;
    101 
    102   // Was a USB charger connected the last time OnPowerStatusChanged() was
    103   // called?
    104   bool usb_charger_was_connected_;
    105 
    106   // Was line power connected the last time onPowerStatusChanged() was called?
    107   bool line_power_was_connected_;
    108 
    109   DISALLOW_COPY_AND_ASSIGN(TrayPower);
    110 };
    111 
    112 }  // namespace ash
    113 
    114 #endif  // ASH_SYSTEM_CHROMEOS_POWER_TRAY_POWER_H_
    115