athena/activity/activity_manager_impl.cc

   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 #include "athena/activity/public/activity_manager.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "athena/activity/public/activity_view_manager.h"
  11 #include "base/logging.h"
  12
  13 namespace athena {
  14
  15 namespace {
  16
  17 ActivityManager* instance = NULL;
  18
  19 class ActivityManagerImpl : public ActivityManager {
  20  public:
  21   ActivityManagerImpl() {
  22     CHECK(!instance);
  23     instance = this;
  24   }
  25   virtual ~ActivityManagerImpl() {
  26     CHECK_EQ(this, instance);
  27     instance = NULL;
  28   }
  29
  30   // ActivityManager:
  31   virtual void AddActivity(Activity* activity) OVERRIDE {
  32     CHECK(activities_.end() == std::find(activities_.begin(),
  33                                          activities_.end(),
  34                                          activity));
  35     activities_.push_back(activity);
  36     ActivityViewManager* manager = ActivityViewManager::Get();
  37     manager->AddActivity(activity);
  38   }
  39
  40   virtual void RemoveActivity(Activity* activity) OVERRIDE {
  41     std::vector<Activity*>::iterator find = std::find(activities_.begin(),
  42                                                       activities_.end(),
  43                                                       activity);
  44     if (find != activities_.end()) {
  45       activities_.erase(find);
  46
  47       ActivityViewManager* manager = ActivityViewManager::Get();
  48       manager->AddActivity(activity);
  49     }
  50   }
  51
  52   virtual void UpdateActivity(Activity* activity) OVERRIDE {
  53     ActivityViewManager* manager = ActivityViewManager::Get();
  54     manager->UpdateActivity(activity);
  55   }
  56
  57  private:
  58   std::vector<Activity*> activities_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(ActivityManagerImpl);
  61 };
  62
  63 }  // namespace
  64
  65 // static
  66 ActivityManager* ActivityManager::Create() {
  67   new ActivityManagerImpl();
  68   CHECK(instance);
  69
  70   ActivityViewManager::Create();
  71
  72   return instance;
  73 }
  74
  75 ActivityManager* ActivityManager::Get() {
  76   return instance;
  77 }
  78
  79 void ActivityManager::Shutdown() {
  80   ActivityViewManager::Shutdown();
  81
  82   CHECK(instance);
  83   delete instance;
  84 }
  85
  86 }  // namespace athena