content/renderer/active_notification_tracker.h

   1 // Copyright (c) 2012 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 CONTENT_RENDERER_ACTIVE_NOTIFICATION_TRACKER_H_
   6 #define CONTENT_RENDERER_ACTIVE_NOTIFICATION_TRACKER_H_
   7
   8 #include <map>
   9
  10 #include "base/basictypes.h"
  11 #include "base/containers/hash_tables.h"
  12 #include "base/id_map.h"
  13 #include "content/common/content_export.h"
  14 #include "third_party/WebKit/public/web/WebNotification.h"
  15
  16 namespace content {
  17
  18 // This class manages the set of active Notification objects in either
  19 // a render or worker process.  This class should be accessed only on
  20 // the main thread.
  21 class CONTENT_EXPORT ActiveNotificationTracker {
  22  public:
  23   ActiveNotificationTracker();
  24   ~ActiveNotificationTracker();
  25
  26   // Methods for tracking active notification objects.
  27   int RegisterNotification(const blink::WebNotification& notification);
  28   void UnregisterNotification(int id);
  29   bool GetId(const blink::WebNotification& notification, int& id);
  30   bool GetNotification(int id, blink::WebNotification* notification);
  31
  32   // Clears out all active notifications.  Useful on page navigation.
  33   void Clear();
  34
  35  private:
  36   typedef std::map<blink::WebNotification, int> ReverseTable;
  37
  38   // Tracking maps for active notifications.
  39   IDMap<blink::WebNotification> notification_table_;
  40   ReverseTable reverse_notification_table_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(ActiveNotificationTracker);
  43 };
  44
  45 }  // namespace content
  46
  47 #endif  // CONTENT_RENDERER_ACTIVE_NOTIFICATION_TRACKER_H_