chrome/browser/ui/webui/options/chromeos/power_handler.h

   1 // Copyright 2014 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 CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_POWER_HANDLER_H_
   6 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_POWER_HANDLER_H_
   7
   8 #include "ash/system/chromeos/power/power_status.h"
   9 #include "base/macros.h"
  10 #include "base/strings/string16.h"
  11 #include "chrome/browser/ui/webui/options/options_ui.h"
  12
  13 namespace chromeos {
  14 namespace options {
  15
  16 // Shows battery status and power settings.
  17 class PowerHandler : public ::options::OptionsPageUIHandler,
  18                      public ash::PowerStatus::Observer {
  19  public:
  20   PowerHandler();
  21   ~PowerHandler() override;
  22
  23   // OptionsPageUIHandler implementation.
  24   void GetLocalizedValues(base::DictionaryValue* localized_strings) override;
  25   void InitializePage() override;
  26   void RegisterMessages() override;
  27
  28   // ash::PowerStatus::Observer implementation.
  29   void OnPowerStatusChanged() override;
  30
  31 private:
  32   // Gets the battery status text, showing the percentage and time remaining if
  33   // calculated. Returns an empty string if there is no battery.
  34   base::string16 GetStatusValue() const;
  35
  36   // Helper function to get the battery status text, including the 'Battery'
  37   // label at the beginning. Wraps GetStatusValue(). Returns an empty string if
  38   // there is no battery.
  39   base::string16 GetFullStatusText() const;
  40
  41   // Handler for the battery icon request.
  42   void GetBatteryIcon(const base::ListValue* args);
  43
  44   DISALLOW_COPY_AND_ASSIGN(PowerHandler);
  45 };
  46
  47 }  // namespace options
  48 }  // namespace chromeos
  49
  50 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_POWER_HANDLER_H_