Introduce FileSystemFileUtil and -Proxy to decorate base::file_util in webkit/fileapi.
BUG=74841
TEST=none
Review URL: http://codereview.chromium.org/6604020
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76875 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/webkit/fileapi/file_system_file_util_proxy.h b/webkit/fileapi/file_system_file_util_proxy.h
new file mode 100644
index 0000000..0f10507
--- /dev/null
+++ b/webkit/fileapi/file_system_file_util_proxy.h
@@ -0,0 +1,150 @@
+// 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 WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
+#define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
+
+#include <vector>
+
+#include "base/callback.h"
+#include "base/file_path.h"
+#include "base/file_util_proxy.h"
+#include "base/platform_file.h"
+#include "base/ref_counted.h"
+#include "base/tracked_objects.h"
+
+namespace base {
+class MessageLoopProxy;
+class Time;
+}
+
+namespace fileapi {
+
+class FileSystemOperationContext;
+
+using base::MessageLoopProxy;
+using base::PlatformFile;
+
+// This class provides asynchronous access to common file routines for the
+// FileSystem API.
+class FileSystemFileUtilProxy {
+ public:
+ typedef base::FileUtilProxy::StatusCallback StatusCallback;
+ typedef base::FileUtilProxy::CreateOrOpenCallback CreateOrOpenCallback;
+ typedef base::FileUtilProxy::EnsureFileExistsCallback
+ EnsureFileExistsCallback;
+ typedef base::FileUtilProxy::GetFileInfoCallback GetFileInfoCallback;
+ typedef base::FileUtilProxy::ReadDirectoryCallback ReadDirectoryCallback;
+
+ // Creates or opens a file with the given flags. It is invalid to pass NULL
+ // for the callback.
+ // If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to create
+ // a new file at the given |file_path| and calls back with
+ // PLATFORM_FILE_ERROR_FILE_EXISTS if the |file_path| already exists.
+ static bool CreateOrOpen(const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ int file_flags,
+ CreateOrOpenCallback* callback);
+
+ // Close the given file handle.
+ static bool Close(const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ PlatformFile,
+ StatusCallback* callback);
+
+ // Ensures that the given |file_path| exist. This creates a empty new file
+ // at |file_path| if the |file_path| does not exist.
+ // If a new file han not existed and is created at the |file_path|,
+ // |created| of the callback argument is set true and |error code|
+ // is set PLATFORM_FILE_OK.
+ // If the file already exists, |created| is set false and |error code|
+ // is set PLATFORM_FILE_OK.
+ // If the file hasn't existed but it couldn't be created for some other
+ // reasons, |created| is set false and |error code| indicates the error.
+ static bool EnsureFileExists(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ EnsureFileExistsCallback* callback);
+
+ // Retrieves the information about a file. It is invalid to pass NULL for the
+ // callback.
+ static bool GetFileInfo(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ GetFileInfoCallback* callback);
+
+ static bool ReadDirectory(const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ ReadDirectoryCallback* callback);
+
+ // Creates directory at given path. It's an error to create
+ // if |exclusive| is true and dir already exists.
+ static bool CreateDirectory(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ bool exclusive,
+ StatusCallback* callback);
+
+ // Copies a file or a directory from |src_file_path| to |dest_file_path|
+ // Error cases:
+ // If destination file doesn't exist or destination's parent
+ // doesn't exists.
+ // If source dir exists but destination path is an existing file.
+ // If source file exists but destination path is an existing directory.
+ // If source is a parent of destination.
+ // If source doesn't exists.
+ static bool Copy(const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& src_file_path,
+ const FilePath& dest_file_path,
+ StatusCallback* callback);
+
+ // Moves a file or a directory from src_file_path to dest_file_path.
+ // Error cases are similar to Copy method's error cases.
+ static bool Move(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& src_file_path,
+ const FilePath& dest_file_path,
+ StatusCallback* callback);
+
+ // Deletes a file or a directory.
+ // It is an error to delete a non-empty directory with recursive=false.
+ static bool Delete(const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ bool recursive,
+ StatusCallback* callback);
+
+ // Touches a file. The callback can be NULL.
+ static bool Touch(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& file_path,
+ const base::Time& last_access_time,
+ const base::Time& last_modified_time,
+ StatusCallback* callback);
+
+ // Truncates a file to the given length. If |length| is greater than the
+ // current length of the file, the file will be extended with zeroes.
+ // The callback can be NULL.
+ static bool Truncate(
+ const FileSystemOperationContext& context,
+ scoped_refptr<MessageLoopProxy> message_loop_proxy,
+ const FilePath& path,
+ int64 length,
+ StatusCallback* callback);
+
+ private:
+ DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemFileUtilProxy);
+};
+
+} // namespace fileapi
+
+#endif // WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
