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      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_
     53