extensions/browser/extension_host_observer.h

   1 // Copyright 2015 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 EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_
   6 #define EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_
   7
   8 #include <string>
   9
  10 namespace extensions {
  11 class ExtensionHost;
  12
  13 class ExtensionHostObserver {
  14  public:
  15   virtual ~ExtensionHostObserver() {}
  16
  17   // TODO(kalman): Why do these all return const ExtensionHosts? It seems
  18   // perfectly reasonable for an Observer implementation to mutate any
  19   // ExtensionHost it's given.
  20
  21   // Called when an ExtensionHost is destroyed.
  22   virtual void OnExtensionHostDestroyed(const ExtensionHost* host) {}
  23
  24   // Called when a message has been disptached to the event page corresponding
  25   // to |host|.
  26   virtual void OnBackgroundEventDispatched(const ExtensionHost* host,
  27                                            const std::string& event_name,
  28                                            int event_id) {}
  29
  30   // Called when a previously dispatched message has been acked by the
  31   // event page for |host|.
  32   virtual void OnBackgroundEventAcked(const ExtensionHost* host, int event_id) {
  33   }
  34
  35   // Called when the extension associated with |host| starts a new network
  36   // request.
  37   virtual void OnNetworkRequestStarted(const ExtensionHost* host,
  38                                        uint64 request_id) {}
  39
  40   // Called when the network request with |request_id| is done.
  41   virtual void OnNetworkRequestDone(const ExtensionHost* host,
  42                                     uint64 request_id) {}
  43 };
  44
  45 }  // namespace extensions
  46
  47 #endif /* EXTENSIONS_BROWSER_EXTENSION_HOST_OBSERVER_H_ */