Refactor FileSystem

content/renderer/pepper/pepper_file_io_host.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/pepper/pepper_file_io_host.h"
 
 #include "base/bind.h"
+#include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_util_proxy.h"
 #include "content/public/common/content_client.h"
 #include "content/public/renderer/content_renderer_client.h"
+#include "content/renderer/pepper/null_file_system_callback_dispatcher.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/host/dispatch_host_message.h"
 #include "ppapi/host/ppapi_host.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/file_type_conversion.h"
 #include "ppapi/shared_impl/time_conversion.h"
 #include "ppapi/thunk/enter.h"
-#include "webkit/fileapi/file_system_callback_dispatcher.h"
 #include "webkit/plugins/ppapi/file_callbacks.h"
 #include "webkit/plugins/ppapi/host_globals.h"
 #include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
 #include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
 #include "webkit/plugins/ppapi/quota_file_io.h"
 
 namespace content {
 
 using ppapi::FileIOStateManager;
 using ppapi::PPTimeToTime;
 using ppapi::TimeToPPTime;
 using ppapi::host::ReplyMessageContext;
 using ppapi::thunk::EnterResourceNoLock;
 using ppapi::thunk::PPB_FileRef_API;
 using webkit::ppapi::PPB_FileRef_Impl;
 using webkit::ppapi::PluginDelegate;
 
 namespace {
 
 // The maximum size we'll support reading in one chunk. The renderer process
 // must allocate a buffer sized according to the request of the plugin. To
 // keep things from getting out of control, we cap the read size to this value.
 // This should generally be OK since the API specifies that it may perform a
 // partial read.
 static const int32_t kMaxReadSize = 32 * 1024 * 1024;  // 32MB
 
 typedef base::Callback<void (base::PlatformFileError)> PlatformGeneralCallback;
 
 class PlatformGeneralCallbackTranslator
-    : public fileapi::FileSystemCallbackDispatcher {
+    : public NullFileSystemCallbackDispatcher {
  public:
   explicit PlatformGeneralCallbackTranslator(
       const PlatformGeneralCallback& callback)
     : callback_(callback) {}
 
   virtual ~PlatformGeneralCallbackTranslator() {}
 
   virtual void DidSucceed() OVERRIDE {
     callback_.Run(base::PLATFORM_FILE_OK);
   }
 
-  virtual void DidReadMetadata(const base::PlatformFileInfo& file_info,
-                               const base::FilePath& platform_path) OVERRIDE {
-    NOTREACHED();
-  }
-
-  virtual void DidCreateSnapshotFile(
-      const base::PlatformFileInfo& file_info,
-      const base::FilePath& platform_path) OVERRIDE {
-    NOTREACHED();
-  }
-
-  virtual void DidReadDirectory(
-      const std::vector<base::FileUtilProxy::Entry>& entries,
-      bool has_more) OVERRIDE {
-    NOTREACHED();
-  }
-
-  virtual void DidOpenFileSystem(const std::string& name,
-                                 const GURL& root) OVERRIDE {
-    NOTREACHED();
-  }
-
-  virtual void DidFail(base::PlatformFileError error_code) OVERRIDE {
-    callback_.Run(error_code);
-  }
-
-  virtual void DidWrite(int64 bytes, bool complete) OVERRIDE {
-    NOTREACHED();
-  }
-
-  virtual void DidOpenFile(base::PlatformFile file) OVERRIDE {
-    NOTREACHED();
+  virtual void DidFail(base::PlatformFileError platform_error) OVERRIDE {
+    callback_.Run(platform_error);
   }
 
  private:
   PlatformGeneralCallback callback_;
 };
 
 int32_t ErrorOrByteNumber(int32_t pp_error, int32_t byte_number) {
   // On the plugin side, some callbacks expect a parameter that means different
   // things depending on whether is negative or not.  We translate for those
   // callbacks here.
@@ skipping 309 matching lines @@
   int32_t rv = state_manager_.CheckOperationState(
       FileIOStateManager::OPERATION_EXCLUSIVE, true);
   if (rv != PP_OK)
     return rv;
 
   if (!quota_file_io_.get())
     return PP_OK;
 
   if (!quota_file_io_->WillWrite(
           offset, bytes_to_write,
-          base::Bind(&PepperFileIOHost::ExecutePlatformWillWriteCallback,
+          base::Bind(&PepperFileIOHost::ExecutePlatformWriteCallback,
                      weak_factory_.GetWeakPtr(),
                      context->MakeReplyMessageContext())))
     return PP_ERROR_FAILED;
 
   state_manager_.SetPendingOperation(FileIOStateManager::OPERATION_EXCLUSIVE);
   return PP_OK_COMPLETIONPENDING;
 }
 
 int32_t PepperFileIOHost::OnHostMsgWillSetLength(
     ppapi::host::HostMessageContext* context,
@@ skipping 139 matching lines @@
     buffer.append(data, bytes_read);
   reply_context.params.set_result(ErrorOrByteNumber(pp_error, bytes_read));
   host()->SendReply(reply_context, PpapiPluginMsg_FileIO_ReadReply(buffer));
   state_manager_.SetOperationFinished();
 }
 
 void PepperFileIOHost::ExecutePlatformWriteCallback(
     ppapi::host::ReplyMessageContext reply_context,
     base::PlatformFileError error_code,
     int bytes_written) {
-  int32_t pp_error = ::ppapi::PlatformFileErrorToPepperError(error_code);
-  reply_context.params.set_result(ErrorOrByteNumber(pp_error, bytes_written));
-  host()->SendReply(reply_context, PpapiPluginMsg_FileIO_GeneralReply());
-  state_manager_.SetOperationFinished();
-}
-
-void PepperFileIOHost::ExecutePlatformWillWriteCallback(
-    ppapi::host::ReplyMessageContext reply_context,
-    base::PlatformFileError error_code,
-    int bytes_written) {
   // On the plugin side, the callback expects a parameter with different meaning
   // depends on whether is negative or not. It is the result here. We translate
   // for the callback.
   int32_t pp_error = ::ppapi::PlatformFileErrorToPepperError(error_code);
   reply_context.params.set_result(ErrorOrByteNumber(pp_error, bytes_written));
   host()->SendReply(reply_context, PpapiPluginMsg_FileIO_GeneralReply());
   state_manager_.SetOperationFinished();
 }
 
 }  // namespace content