src/chrome/browser/task_manager/background_resource_provider.h

   1 // Copyright 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_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_
   6 #define CHROME_BROWSER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "base/strings/string16.h"
  12 #include "chrome/browser/task_manager/resource_provider.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15
  16 class BackgroundContents;
  17 class TaskManager;
  18
  19 namespace task_manager {
  20
  21 class BackgroundContentsResource;
  22
  23 class BackgroundContentsResourceProvider
  24     : public ResourceProvider,
  25       public content::NotificationObserver {
  26  public:
  27   explicit BackgroundContentsResourceProvider(TaskManager* task_manager);
  28
  29   virtual Resource* GetResource(int origin_pid,
  30                                 int render_process_host_id,
  31                                 int routing_id) OVERRIDE;
  32   virtual void StartUpdating() OVERRIDE;
  33   virtual void StopUpdating() OVERRIDE;
  34
  35   // content::NotificationObserver method:
  36   virtual void Observe(int type,
  37                        const content::NotificationSource& source,
  38                        const content::NotificationDetails& details) OVERRIDE;
  39
  40  private:
  41   virtual ~BackgroundContentsResourceProvider();
  42
  43   void Add(BackgroundContents* background_contents, const string16& title);
  44   void Remove(BackgroundContents* background_contents);
  45
  46   void AddToTaskManager(BackgroundContents* background_contents,
  47                         const string16& title);
  48
  49   // Whether we are currently reporting to the task manager. Used to ignore
  50   // notifications sent after StopUpdating().
  51   bool updating_;
  52
  53   TaskManager* task_manager_;
  54
  55   // Maps the actual resources (the BackgroundContents) to the Task Manager
  56   // resources.
  57   typedef std::map<BackgroundContents*, BackgroundContentsResource*>
  58       Resources;
  59   Resources resources_;
  60
  61   // A scoped container for notification registries.
  62   content::NotificationRegistrar registrar_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(BackgroundContentsResourceProvider);
  65 };
  66
  67 }  // namespace task_manager
  68
  69 #endif  // CHROME_BROWSER_TASK_MANAGER_BACKGROUND_RESOURCE_PROVIDER_H_