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// 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/callback_old.h"
#include "base/file_path.h"
#include "base/file_util_proxy.h"
#include "base/memory/ref_counted.h"
#include "base/platform_file.h"
#include "base/tracked_objects.h"
namespace base {
class MessageLoopProxy;
class Time;
}
namespace fileapi {
class FileSystemOperationContext;
using base::MessageLoopProxy;
using base::PlatformFile;
using base::PlatformFileError;
using base::PlatformFileInfo;
// This class provides asynchronous access to common file routines for the
// FileSystem API.
class FileSystemFileUtilProxy {
public:
typedef base::FileUtilProxy::Entry Entry;
typedef base::FileUtilProxy::StatusCallback StatusCallback;
typedef base::Callback<void(PlatformFileError,
bool /* created */
)> EnsureFileExistsCallback;
typedef base::Callback<void(PlatformFileError,
const PlatformFileInfo&,
const FilePath& /* platform_path */
)> GetFileInfoCallback;
typedef base::Callback<void(PlatformFileError,
const std::vector<Entry>&
)> ReadDirectoryCallback;
typedef Callback2<PlatformFileError /* error code */,
const FilePath& /* local_path, where possible */
>::Type GetLocalPathCallback;
// 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,
const EnsureFileExistsCallback& callback);
// Maps virtual file patch to its local physical location.
static bool GetLocalPath(
const FileSystemOperationContext& context,
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& virtual_path,
GetLocalPathCallback* 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,
const GetFileInfoCallback& callback);
static bool ReadDirectory(const FileSystemOperationContext& context,
scoped_refptr<MessageLoopProxy> message_loop_proxy,
const FilePath& file_path,
const 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,
bool recursive,
const 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,
const 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,
const 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,
const 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,
const 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,
const StatusCallback& callback);
private:
DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemFileUtilProxy);
};
} // namespace fileapi
#endif // WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
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