chrome/browser/ui/cocoa/notifications/message_center_tray_bridge.h

   1 // Copyright (c) 2013 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_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_
   6 #define CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_
   7
   8 #import <AppKit/AppKit.h>
   9
  10 #include "base/basictypes.h"
  11 #include "base/mac/scoped_nsobject.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/memory/weak_ptr.h"
  14 #include "base/prefs/pref_member.h"
  15 #include "ui/message_center/message_center.h"
  16 #include "ui/message_center/message_center_tray_delegate.h"
  17
  18 @class MCPopupCollection;
  19 @class MCStatusItemView;
  20 @class MCTrayController;
  21
  22 namespace message_center {
  23 class MessageCenter;
  24 class MessageCenterTray;
  25 }
  26
  27 // MessageCenterTrayBridge is the owner of all the Cocoa UI objects for the
  28 // message_center. It bridges C++ notifications from the MessageCenterTray to
  29 // the various UI objects.
  30 class MessageCenterTrayBridge :
  31     public message_center::MessageCenterTrayDelegate {
  32  public:
  33   explicit MessageCenterTrayBridge(
  34       message_center::MessageCenter* message_center);
  35   ~MessageCenterTrayBridge() override;
  36
  37   // message_center::MessageCenterTrayDelegate:
  38   void OnMessageCenterTrayChanged() override;
  39   bool ShowPopups() override;
  40   void HidePopups() override;
  41   bool ShowMessageCenter() override;
  42   void HideMessageCenter() override;
  43   bool ShowNotifierSettings() override;
  44   bool IsContextMenuEnabled() const override;
  45   message_center::MessageCenterTray* GetMessageCenterTray() override;
  46
  47   message_center::MessageCenter* message_center() { return message_center_; }
  48
  49  private:
  50   friend class MessageCenterTrayBridgeTest;
  51
  52   // Updates the unread count on the status item.
  53   void UpdateStatusItem();
  54
  55   // Opens the message center tray.
  56   void OpenTrayWindow();
  57
  58   // Returns whether the status item allowed based on the preference value.
  59   bool CanShowStatusItem() const;
  60
  61   // Returns whether the status item should be shown if allowed.
  62   bool NeedsStatusItem() const;
  63
  64   // Constructs the status item view and registers its callback.
  65   void ShowStatusItem();
  66
  67   // Destroys the status item view.
  68   void HideStatusItem();
  69
  70   // Called after returning to the event loop from the
  71   // OnMessageCenterTrayChanged event to prevent multiple updates from being
  72   // rendered as the message center is modified.
  73   void HandleMessageCenterTrayChanged();
  74
  75   // Notifies that the user has changed the show menubar item preference.
  76   void OnShowStatusItemChanged();
  77
  78   // The global, singleton message center model object. Weak.
  79   message_center::MessageCenter* message_center_;
  80
  81   // C++ controller for the notification tray UI.
  82   scoped_ptr<message_center::MessageCenterTray> tray_;
  83
  84   // Obj-C window controller for the notification tray.
  85   base::scoped_nsobject<MCTrayController> tray_controller_;
  86
  87   // View that is displayed on the system menu bar item.
  88   base::scoped_nsobject<MCStatusItemView> status_item_view_;
  89
  90   // Obj-C controller for the on-screen popup notifications.
  91   base::scoped_nsobject<MCPopupCollection> popup_collection_;
  92
  93   // Used to ensure only one status item update happens in a given call stack.
  94   bool status_item_update_pending_;
  95
  96   // A PrefMember that calls OnShowStatusItemChanged when the pref is updated
  97   // by the user's selection in the main menu.
  98   BooleanPrefMember show_status_item_;
  99
 100   // Weak pointer factory to posts tasks to self.
 101   base::WeakPtrFactory<MessageCenterTrayBridge> weak_ptr_factory_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(MessageCenterTrayBridge);
 104 };
 105
 106 #endif  // CHROME_BROWSER_UI_COCOA_NOTIFICATIONS_MESSAGE_CENTER_TRAY_BRIDGE_H_