Wired support for file truncating with RemoteFileSystemOperation::OpenFile() method (case when base…

chrome/browser/chromeos/gdata/gdata_file_system_proxy.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_
 #pragma once
 
 #include "webkit/chromeos/fileapi/remote_file_system_proxy.h"
 
@@ skipping 44 matching lines @@
       callback) OVERRIDE;
   virtual void CreateWritableSnapshotFile(
       const GURL& path,
       const fileapi::WritableSnapshotFile& callback) OVERRIDE;
   virtual void OpenFile(
       const GURL& path,
       int file_flags,
       base::ProcessHandle peer_handle,
       const fileapi::FileSystemOperationInterface::OpenFileCallback&
           callback) OVERRIDE;
+  virtual void NotifyFileClosed(
+      const GURL& path,
+      const fileapi::FileSystemOperationInterface::StatusCallback&
+          callback) OVERRIDE;
   // TODO(zelidrag): More methods to follow as we implement other parts of FSO.
 
  protected:
   virtual ~GDataFileSystemProxy();
 
  private:
   // Checks if a given |url| belongs to this file system. If it does,
   // the call will return true and fill in |file_path| with a file path of
   // a corresponding element within this file system.
   static bool ValidateUrl(const GURL& url, FilePath* file_path);
@@ skipping 50 matching lines @@
       base::PlatformFileError open_result,
       const FilePath& local_cache_path);
 
   // Invoked during Truncate() operation. This is called when the truncation of
   // a local cache file is finished on FILE thread.
   void DidTruncate(
       const FilePath& virtual_path,
       const fileapi::FileSystemOperationInterface::StatusCallback& callback,
       base::PlatformFileError* truncate_result);
 
+  // Invoked during OpenFile() operation when truncate or write flags are set.
+  // This is called when a local modifiable cached file is ready for such
+  // operation.
+  void OnOpenFileForWriting(
+      int file_flags,
+      base::ProcessHandle peer_handle,
+      const fileapi::FileSystemOperationInterface::OpenFileCallback& callback,
+      base::PlatformFileError open_result,
+      const FilePath& local_cache_path);
+
+  // Invoked during OpenFile() operation when base::PLATFORM_FILE_OPEN_TRUNCATED
+  // flag is set. This is called when the truncation of a local cache file is
+  // finished on FILE thread.
+  void OnOpenAndTruncate(
+      base::ProcessHandle peer_handle,
+      const fileapi::FileSystemOperationInterface::OpenFileCallback& callback,
+      base::PlatformFile* platform_file,
+      base::PlatformFileError* truncate_result);
+
   // GDataFileSystemProxy is owned by Profile, which outlives
   // GDataFileSystemProxy, which is owned by CrosMountPointProvider (i.e. by
   // the time Profile is removed, the file manager is already gone). Hence
   // it's safe to use this as a raw pointer.
   GDataFileSystemInterface* file_system_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILE_SYSTEM_PROXY_H_