chrome/browser/task_manager/web_contents_resource_provider.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 CHROME_BROWSER_TASK_MANAGER_WEB_CONTENTS_RESOURCE_PROVIDER_H_
   6 #define CHROME_BROWSER_TASK_MANAGER_WEB_CONTENTS_RESOURCE_PROVIDER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "chrome/browser/task_manager/renderer_resource.h"
  13 #include "chrome/browser/task_manager/resource_provider.h"
  14
  15 class TaskManager;
  16
  17 namespace content {
  18 class RenderFrameHost;
  19 class SiteInstance;
  20 class WebContents;
  21 }
  22
  23 namespace task_manager {
  24
  25 class RendererResource;
  26 class TaskManagerWebContentsEntry;
  27 class WebContentsInformation;
  28
  29 // Provides resources to the task manager on behalf of a chrome service that
  30 // owns WebContentses. The chrome service is parameterized as a
  31 // WebContentsInformation, which provides a list of WebContentses to track.
  32 //
  33 // This ResourceProvider is instantiated several times by the task manager, each
  34 // with a different implementation of WebContentsInformation.
  35 class WebContentsResourceProvider : public ResourceProvider {
  36  public:
  37   WebContentsResourceProvider(TaskManager* task_manager,
  38                               scoped_ptr<WebContentsInformation> info);
  39
  40   // ResourceProvider implementation.
  41   RendererResource* GetResource(int origin_pid,
  42                                 int child_id,
  43                                 int route_id) override;
  44   void StartUpdating() override;
  45   void StopUpdating() override;
  46
  47   // Start observing |web_contents| for changes via WebContentsObserver, and
  48   // add it to the task manager.
  49   void OnWebContentsCreated(content::WebContents* web_contents);
  50
  51   // Remove a TaskManagerWebContentsEntry from our tracking list, and delete it.
  52   void DeleteEntry(content::WebContents* web_contents,
  53                    TaskManagerWebContentsEntry* entry);
  54
  55   TaskManager* task_manager() { return task_manager_; }
  56   WebContentsInformation* info() { return info_.get(); }
  57
  58  protected:
  59   ~WebContentsResourceProvider() override;
  60
  61  private:
  62   typedef std::map<content::WebContents*, TaskManagerWebContentsEntry*>
  63       EntryMap;
  64
  65   TaskManager* task_manager_;
  66
  67   // For every WebContents we maintain an entry, which holds the task manager's
  68   // RendererResources for that WebContents, and observes the WebContents for
  69   // changes.
  70   EntryMap entries_;
  71
  72   // The WebContentsInformation that informs us when a new WebContents* is
  73   // created, and which serves as a RendererResource factory for our type.
  74   scoped_ptr<WebContentsInformation> info_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(WebContentsResourceProvider);
  77 };
  78
  79 }  // namespace task_manager
  80
  81 #endif  // CHROME_BROWSER_TASK_MANAGER_WEB_CONTENTS_RESOURCE_PROVIDER_H_