ppapi/proxy/plugin_resource_callback.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 PPAPI_PROXY_PLUGIN_RESOURCE_CALLBACK_H_
   6 #define PPAPI_PROXY_PLUGIN_RESOURCE_CALLBACK_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "ipc/ipc_message.h"
  10 #include "ppapi/proxy/dispatch_reply_message.h"
  11 #include "ppapi/proxy/resource_message_params.h"
  12
  13 namespace ppapi {
  14 namespace proxy {
  15
  16 // |PluginResourceCallback| wraps a |base::Callback| on the plugin side which
  17 // will be triggered in response to a particular message type being received.
  18 // |MsgClass| is the reply message type that the callback will be called with
  19 // and |CallbackType| is the type of the |base::Callback| that will be called.
  20 class PluginResourceCallbackBase
  21     : public base::RefCounted<PluginResourceCallbackBase> {
  22  public:
  23   virtual void Run(const ResourceMessageReplyParams& params,
  24                    const IPC::Message& msg) = 0;
  25  protected:
  26   friend class base::RefCounted<PluginResourceCallbackBase>;
  27   virtual ~PluginResourceCallbackBase() {}
  28 };
  29
  30 template<typename MsgClass, typename CallbackType>
  31 class PluginResourceCallback : public PluginResourceCallbackBase {
  32  public:
  33   explicit PluginResourceCallback(const CallbackType& callback)
  34       : callback_(callback) {}
  35
  36   virtual void Run(
  37       const ResourceMessageReplyParams& reply_params,
  38       const IPC::Message& msg) OVERRIDE {
  39     DispatchResourceReplyOrDefaultParams<MsgClass>(
  40         &callback_, &CallbackType::Run, reply_params, msg);
  41   }
  42
  43  private:
  44   virtual ~PluginResourceCallback() {}
  45
  46   CallbackType callback_;
  47 };
  48
  49 }  // namespace proxy
  50 }  // namespace ppapi
  51
  52 #endif  // PPAPI_PROXY_PLUGIN_RESOURCE_CALLBACK_H_