chrome/browser/task_manager/tab_contents_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_TAB_CONTENTS_RESOURCE_PROVIDER_H_
   6 #define CHROME_BROWSER_TASK_MANAGER_TAB_CONTENTS_RESOURCE_PROVIDER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "chrome/browser/task_manager/resource_provider.h"
  12 #include "content/public/browser/notification_observer.h"
  13 #include "content/public/browser/notification_registrar.h"
  14
  15 class TaskManager;
  16
  17 namespace content {
  18 class WebContents;
  19 class NotificationSource;
  20 class NotificationDetails;
  21 }
  22
  23 namespace task_manager {
  24
  25 class TabContentsResource;
  26
  27 // Provides resources for tab contents, prerendered pages, Instant pages, and
  28 // background printing pages.
  29 class TabContentsResourceProvider : public ResourceProvider,
  30                                     public content::NotificationObserver {
  31  public:
  32   explicit TabContentsResourceProvider(TaskManager* task_manager);
  33
  34   virtual Resource* GetResource(int origin_pid,
  35                                 int child_id,
  36                                 int route_id) OVERRIDE;
  37   virtual void StartUpdating() OVERRIDE;
  38   virtual void StopUpdating() OVERRIDE;
  39
  40   // content::NotificationObserver method:
  41   virtual void Observe(int type,
  42                        const content::NotificationSource& source,
  43                        const content::NotificationDetails& details) OVERRIDE;
  44
  45  private:
  46   virtual ~TabContentsResourceProvider();
  47
  48   void Add(content::WebContents* web_contents);
  49   void Remove(content::WebContents* web_contents);
  50
  51   void AddToTaskManager(content::WebContents* web_contents);
  52
  53   // Whether we are currently reporting to the task manager. Used to ignore
  54   // notifications sent after StopUpdating().
  55   bool updating_;
  56
  57   TaskManager* task_manager_;
  58
  59   // Maps the actual resources (the WebContentses) to the Task Manager
  60   // resources.
  61   std::map<content::WebContents*, TabContentsResource*> resources_;
  62
  63   // A scoped container for notification registries.
  64   content::NotificationRegistrar registrar_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(TabContentsResourceProvider);
  67 };
  68
  69 }  // namespace task_manager
  70
  71 #endif  // CHROME_BROWSER_TASK_MANAGER_TAB_CONTENTS_RESOURCE_PROVIDER_H_