content/renderer/npapi/plugin_channel_host.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_NPAPI_PLUGIN_CHANNEL_HOST_H_
   6 #define CONTENT_RENDERER_NPAPI_PLUGIN_CHANNEL_HOST_H_
   7
   8 #include "base/containers/hash_tables.h"
   9 #include "content/child/npapi/np_channel_base.h"
  10 #include "ipc/ipc_channel_handle.h"
  11
  12 namespace content {
  13 class NPObjectBase;
  14
  15 // Encapsulates an IPC channel between the renderer and one plugin process.
  16 // On the plugin side there's a corresponding PluginChannel.
  17 class PluginChannelHost : public NPChannelBase {
  18  public:
  19 #if defined(OS_MACOSX)
  20   // TODO(shess): Debugging for http://crbug.com/97285 .  See comment
  21   // in plugin_channel_host.cc.
  22   static bool* GetRemoveTrackingFlag();
  23 #endif
  24   static PluginChannelHost* GetPluginChannelHost(
  25       const IPC::ChannelHandle& channel_handle,
  26       base::SingleThreadTaskRunner* ipc_task_runner);
  27
  28   bool Init(base::SingleThreadTaskRunner* ipc_task_runner,
  29             bool create_pipe_now,
  30             base::WaitableEvent* shutdown_event) override;
  31
  32   int GenerateRouteID() override;
  33
  34   void AddRoute(int route_id, IPC::Listener* listener,
  35                 NPObjectBase* npobject);
  36   void RemoveRoute(int route_id);
  37
  38   // NPChannelBase override:
  39   bool Send(IPC::Message* msg) override;
  40
  41   // IPC::Listener override
  42   void OnChannelError() override;
  43
  44   static void Broadcast(IPC::Message* message) {
  45     NPChannelBase::Broadcast(message);
  46   }
  47
  48   bool expecting_shutdown() { return expecting_shutdown_; }
  49
  50  private:
  51   // Called on the render thread
  52   PluginChannelHost();
  53   ~PluginChannelHost() override;
  54
  55   static NPChannelBase* ClassFactory() { return new PluginChannelHost(); }
  56
  57   bool OnControlMessageReceived(const IPC::Message& message) override;
  58   void OnSetException(const std::string& message);
  59   void OnPluginShuttingDown();
  60
  61   // Keep track of all the registered WebPluginDelegeProxies to
  62   // inform about OnChannelError
  63   typedef base::hash_map<int, IPC::Listener*> ProxyMap;
  64   ProxyMap proxies_;
  65
  66   // True if we are expecting the plugin process to go away - in which case,
  67   // don't treat it as a crash.
  68   bool expecting_shutdown_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(PluginChannelHost);
  71 };
  72
  73 }  // namespace content
  74
  75 #endif  // CONTENT_RENDERER_NPAPI_PLUGIN_CHANNEL_HOST_H_