chrome/browser/chromeos/input_method/browser_state_monitor.h

   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 CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_
   6 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_
   7
   8 #include <string>
   9
  10 #include "chrome/browser/api/prefs/pref_member.h"
  11 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
  12 #include "content/public/browser/notification_observer.h"
  13 #include "content/public/browser/notification_registrar.h"
  14 #include "content/public/browser/notification_types.h"
  15
  16 class PrefService;
  17
  18 namespace chromeos {
  19 namespace input_method {
  20
  21 // A class which monitors a notification from the browser to keep track of the
  22 // browser state (not logged in, logged in, etc.) and notify the current state
  23 // to the input method manager. The class also updates the appropriate Chrome
  24 // prefs (~/Local\ State or ~/Preferences) depending on the current browser
  25 // state.
  26 class BrowserStateMonitor : public content::NotificationObserver,
  27                             public InputMethodManager::Observer {
  28  public:
  29   explicit BrowserStateMonitor(InputMethodManager* manager);
  30   virtual ~BrowserStateMonitor();
  31
  32   InputMethodManager::State state() const { return state_; }
  33
  34   void SetPrefServiceForTesting(PrefService* pref_service);
  35
  36  protected:
  37   // Updates ~/Local\ State file. protected: for testing.
  38   virtual void UpdateLocalState(const std::string& current_input_method);
  39   // Updates ~/Preferences file. protected: for testing.
  40   virtual void UpdateUserPreferences(const std::string& current_input_method);
  41
  42   // InputMethodManager::Observer overrides:
  43   virtual void InputMethodChanged(InputMethodManager* manager,
  44                                   bool show_message) OVERRIDE;
  45   virtual void InputMethodPropertyChanged(InputMethodManager* manager) OVERRIDE;
  46
  47   // content::NotificationObserver overrides:
  48   virtual void Observe(int type,
  49                        const content::NotificationSource& source,
  50                        const content::NotificationDetails& details) OVERRIDE;
  51
  52  private:
  53   void SetState(InputMethodManager::State new_state);
  54   void InitializePrefMembers();
  55
  56   InputMethodManager* manager_;
  57   InputMethodManager::State state_;
  58
  59   // This is used to register this object to some browser notifications.
  60   content::NotificationRegistrar notification_registrar_;
  61
  62   // For testing.
  63   PrefService* pref_service_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(BrowserStateMonitor);
  66 };
  67
  68 }  // namespace input_method
  69 }  // namespace chromeos
  70
  71 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_BROWSER_STATE_MONITOR_H_