athena/activity/public/activity_manager.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 ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_
   6 #define ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_
   7
   8 #include <vector>
   9
  10 #include "athena/athena_export.h"
  11
  12 namespace aura {
  13 class Window;
  14 }
  15
  16 namespace athena {
  17
  18 class Activity;
  19 class ActivityManagerObserver;
  20
  21 using ActivityList = std::vector<Activity*>;
  22
  23 // Manages a set of activities.
  24 class ATHENA_EXPORT ActivityManager {
  25  public:
  26   static ActivityManager* Create();
  27   static ActivityManager* Get();
  28   static void Shutdown();
  29
  30   virtual ~ActivityManager() {}
  31
  32   // Adds/Removes an activity. ActivityManager owns the activities.
  33   virtual void AddActivity(Activity* activity) = 0;
  34   virtual void RemoveActivity(Activity* activity) = 0;
  35
  36   // Returns a list of activities, sorted in their activation order (the most
  37   // recently used activity is at the front of the returned list).
  38   virtual const ActivityList& GetActivityList() = 0;
  39
  40   // Returns the activity that has a |window| as toplevel window, or
  41   // nullptr if such activity does not exist.
  42   virtual Activity* GetActivityForWindow(aura::Window* window) = 0;
  43
  44   virtual void AddObserver(ActivityManagerObserver* observer) = 0;
  45   virtual void RemoveObserver(ActivityManagerObserver* observer) = 0;
  46 };
  47
  48 }  // namespace athena
  49
  50 #endif  // ATHENA_ACTIVITY_PUBLIC_ACTIVITY_MANAGER_H_