Implement a proxy for Pepper FileIO.

ppapi/proxy/ppb_file_io_proxy.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_PROXY_PPB_FILE_IO_PROXY_H_
+#define PPAPI_PROXY_PPB_FILE_IO_PROXY_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "ppapi/shared_impl/file_io_impl.h"
+#include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/proxy/proxy_non_thread_safe_ref_count.h"
+
+namespace ppapi {
+
+class HostResource;
+namespace proxy {
+
+class PPB_FileIO_Proxy : public InterfaceProxy {
+ public:
+  explicit PPB_FileIO_Proxy(Dispatcher* dispatcher);
+  virtual ~PPB_FileIO_Proxy();
+
+  static PP_Resource CreateProxyResource(PP_Instance instance);
+
+  // InterfaceProxy implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+
+  static const ApiID kApiID = API_ID_PPB_FILE_IO;
+
+ private:
+  // Plugin -> Host message handlers.
+  void OnHostMsgCreate(PP_Instance instance, HostResource* result);
+  void OnHostMsgOpen(const HostResource& host_resource,
+                     const HostResource& file_ref_resource,
+                     int32_t open_flags);
+  void OnHostMsgClose(const HostResource& host_resource);
+  void OnHostMsgQuery(const HostResource& host_resource);
+  void OnHostMsgTouch(const HostResource& host_resource,
+                      PP_Time last_access_time,
+                      PP_Time last_modified_time);
+  void OnHostMsgRead(const HostResource& host_resource,
+                     int64_t offset,
+                     int32_t bytes_to_read);
+  void OnHostMsgWrite(const HostResource& host_resource,
+                      int64_t offset,
+                      const std::string& data);
+  void OnHostMsgSetLength(const HostResource& host_resource,
+                          int64_t length);
+  void OnHostMsgFlush(const HostResource& host_resource);
+  void OnHostMsgWillWrite(const HostResource& host_resource,
+                          int64_t offset,
+                          int32_t bytes_to_write);
+  void OnHostMsgWillSetLength(const HostResource& host_resource,
+                              int64_t length);
+
+  // Host -> Plugin message handlers.
+  void OnPluginMsgGeneralComplete(const HostResource& host_resource,
+                                  int32_t result);
+  void OnPluginMsgOpenFileComplete(const HostResource& host_resource,
+                                  int32_t result);
+  void OnPluginMsgQueryComplete(const HostResource& host_resource,
+                                int32_t result,
+                                const PP_FileInfo& info);
+  void OnPluginMsgReadComplete(const HostResource& host_resource,
+                               int32_t result,
+                               const std::string& data);
+  void OnPluginMsgWriteComplete(const HostResource& host_resource,
+                                int32_t result);
+
+  // Host-side callback handlers. These convert the callbacks to an IPC message
+  // to the plugin.
+  void GeneralCallbackCompleteInHost(int32_t pp_error,
+                                     const HostResource& host_resource);
+  void OpenFileCallbackCompleteInHost(int32_t pp_error,
+                                      const HostResource& host_resource);
+  void QueryCallbackCompleteInHost(int32_t pp_error,
+                                   const HostResource& host_resource,
+                                   PP_FileInfo* info);
+  void ReadCallbackCompleteInHost(int32_t pp_error,
+                                  const HostResource& host_resource,
+                                  std::string* data);
+  pp::CompletionCallbackFactory<PPB_FileIO_Proxy,
+                                ProxyNonThreadSafeRefCount> callback_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(PPB_FileIO_Proxy);
+};
+
+}  // namespace proxy
+}  // namespace ppapi
+
+#endif  // PPAPI_PROXY_PPB_FILE_IO_PROXY_H_