[Refactor] to rename and re-layer the file_util stack layers.

webkit/fileapi/file_system_file_util.h

Index: webkit/fileapi/file_system_file_util.h
diff --git a/webkit/fileapi/file_system_file_util.h b/webkit/fileapi/file_system_file_util.h
deleted file mode 100644
index 8a46fbdb6d5974369ce2d8e7b12bc76663879425..0000000000000000000000000000000000000000
--- a/webkit/fileapi/file_system_file_util.h
+++ /dev/null
@@ -1,286 +0,0 @@
-// 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_H_
-#define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_H_
-
-#include "base/callback.h"
-#include "base/file_path.h"
-#include "base/file_util.h"
-#include "base/file_util_proxy.h"
-#include "base/memory/ref_counted.h"
-#include "base/platform_file.h"
-#include "base/tracked_objects.h"
-#include "webkit/fileapi/file_system_types.h"
-
-namespace base {
-struct PlatformFileInfo;
-class MessageLoopProxy;
-class Time;
-}
-
-namespace fileapi {
-
-using base::PlatformFile;
-using base::PlatformFileError;
-class FileSystemOperationContext;
-
-// A large part of this implementation is taken from base::FileUtilProxy.
-// TODO(dmikurube, kinuko): Clean up base::FileUtilProxy to factor out common
-// routines. It includes dropping FileAPI-specific routines from FileUtilProxy.
-//
-// The default implementations of the virtual methods below (*1) assume the
-// given paths are native ones for the host platform.  The subclasses that
-// perform local path translation/obfuscation must override them.
-//  (*1) All virtual methods which receive FilePath as their arguments:
-//  CreateOrOpen, EnsureFileExists, GetLocalFilePath, GetFileInfo,
-//  ReadDirectory, CreateDirectory, CopyOrMoveFile, DeleteFile,
-//  DeleteSingleDirectory, Touch, Truncate, PathExists, DirectoryExists,
-//  IsDirectoryEmpty and CreateFileEnumerator.
-//
-// The methods below (*2) assume the given paths may not be native ones for the
-// host platform.  The subclasses should not override them.  They provide basic
-// meta logic by using other virtual methods.
-//  (*2) All non-virtual methods: Copy, Move, Delete, DeleteDirectoryRecursive,
-//  PerformCommonCheckAndPreparationForMoveAndCopy and CopyOrMoveDirectory.
-class FileSystemFileUtil {
- public:
-  FileSystemFileUtil() {}
-  virtual ~FileSystemFileUtil() {}
-
-  // 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.
-  virtual PlatformFileError CreateOrOpen(
-      FileSystemOperationContext* context,
-      const FilePath& file_path,
-      int file_flags,
-      PlatformFile* file_handle,
-      bool* created);
-
-  // Close the given file handle.
-  virtual PlatformFileError Close(
-      FileSystemOperationContext* context,
-      PlatformFile);
-
-  // 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.
-  virtual PlatformFileError EnsureFileExists(
-      FileSystemOperationContext* context,
-      const FilePath& file_path, bool* created);
-
-  // Maps |virtual_path| given |context| into |local_path| which represents
-  // physical file location on the host OS. This may not always make sense for
-  // all subclasses.
-  virtual PlatformFileError GetLocalFilePath(
-      FileSystemOperationContext* context,
-      const FilePath& virtual_path,
-      FilePath* local_path);
-
-  // Retrieves the information about a file.  It is invalid to pass NULL for the
-  // callback.
-  virtual PlatformFileError GetFileInfo(
-      FileSystemOperationContext* context,
-      const FilePath& file_,
-      base::PlatformFileInfo* file_info,
-      FilePath* platform_path);
-
-  // Reads the filenames in |file_path|.
-  virtual PlatformFileError ReadDirectory(
-      FileSystemOperationContext* context,
-      const FilePath& file_path,
-      std::vector<base::FileUtilProxy::Entry>* entries);
-
-  // Creates directory at given path. It's an error to create
-  // if |exclusive| is true and dir already exists.
-  virtual PlatformFileError CreateDirectory(
-      FileSystemOperationContext* context,
-      const FilePath& file_path,
-      bool exclusive,
-      bool recursive);
-
-  // Copies or moves a single file.
-  virtual PlatformFileError CopyOrMoveFile(
-      FileSystemOperationContext* context,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path,
-      bool copy);
-
-  // Copies in a single file from a different filesystem.  The src_file_path is
-  // a true local platform path, regardless of which subclass of
-  // FileSystemFileUtil is being invoked.
-  virtual PlatformFileError CopyInForeignFile(
-        FileSystemOperationContext* context,
-        const FilePath& src_file_path,
-        const FilePath& dest_file_path);
-
-  // Copies a file or a directory from |src_file_path| to |dest_file_path|.
-  //
-  // Error cases:
-  // If destination's parent doesn't exist.
-  // 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 exist.
-  //
-  // This method calls one of the following methods depending on whether the
-  // target is a directory or not.
-  // - (virtual) CopyOrMoveFile or
-  // - (non-virtual) CopyOrMoveDirectory.
-  PlatformFileError Copy(
-      FileSystemOperationContext* context,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path);
-
-  // Moves a file or a directory from src_file_path to dest_file_path.
-  //
-  // Error cases are similar to Copy method's error cases.
-  //
-  // This method calls one of the following methods depending on whether the
-  // target is a directory or not.
-  // - (virtual) CopyOrMoveFile or
-  // - (non-virtual) CopyOrMoveDirectory.
-  PlatformFileError Move(
-      FileSystemOperationContext* context,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path);
-
-  // Deletes a file or a directory.
-  // It is an error to delete a non-empty directory with recursive=false.
-  //
-  // This method calls one of the following methods depending on whether the
-  // target is a directory or not, and whether the |recursive| flag is given or
-  // not.
-  // - (virtual) DeleteFile,
-  // - (virtual) DeleteSingleDirectory or
-  // - (non-virtual) DeleteDirectoryRecursive which calls two methods above.
-  PlatformFileError Delete(
-      FileSystemOperationContext* context,
-      const FilePath& file_path,
-      bool recursive);
-
-  // Deletes a single file.
-  // It assumes the given path points a file.
-  //
-  // This method is called from DeleteDirectoryRecursive and Delete (both are
-  // non-virtual).
-  virtual PlatformFileError DeleteFile(
-      FileSystemOperationContext* unused,
-      const FilePath& file_path);
-
-  // Deletes a single empty directory.
-  // It assumes the given path points an empty directory.
-  //
-  // This method is called from DeleteDirectoryRecursive and Delete (both are
-  // non-virtual).
-  virtual PlatformFileError DeleteSingleDirectory(
-      FileSystemOperationContext* unused,
-      const FilePath& file_path);
-
-  // Touches a file. The callback can be NULL.
-  virtual PlatformFileError Touch(
-      FileSystemOperationContext* context,
-      const FilePath& file_path,
-      const base::Time& last_access_time,
-      const base::Time& last_modified_time);
-
-  // 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.
-  virtual PlatformFileError Truncate(
-      FileSystemOperationContext* context,
-      const FilePath& path,
-      int64 length);
-
-  virtual bool PathExists(
-      FileSystemOperationContext* unused,
-      const FilePath& file_path);
-
-  virtual bool DirectoryExists(
-      FileSystemOperationContext* unused,
-      const FilePath& file_path);
-
-  virtual bool IsDirectoryEmpty(
-      FileSystemOperationContext* unused,
-      const FilePath& file_path);
-
-  // It will be implemented by each subclass such as FileSystemFileEnumerator.
-  class AbstractFileEnumerator {
-   public:
-    virtual ~AbstractFileEnumerator() {}
-
-    // Returns an empty string if there are no more results.
-    virtual FilePath Next() = 0;
-
-    virtual bool IsDirectory() = 0;
-  };
-
-  class EmptyFileEnumerator : public AbstractFileEnumerator {
-    virtual FilePath Next() { return FilePath(); }
-    virtual bool IsDirectory() { return false; }
-  };
-
-  // Returns a pointer to a new instance of AbstractFileEnumerator which is
-  // implemented for each FileUtil subclass. The instance needs to be freed
-  // by the caller, and its lifetime should not extend past when the current
-  // call returns to the main FILE message loop.
-  virtual AbstractFileEnumerator* CreateFileEnumerator(
-      FileSystemOperationContext* unused,
-      const FilePath& root_path);
-
- protected:
-  // Deletes a directory and all entries under the directory.
-  //
-  // This method is called from Delete.  It internally calls two following
-  // virtual methods,
-  // - (virtual) DeleteFile to delete files, and
-  // - (virtual) DeleteSingleDirectory to delete empty directories after all
-  // the files are deleted.
-  PlatformFileError DeleteDirectoryRecursive(
-      FileSystemOperationContext* context,
-      const FilePath& file_path);
-
-  // This also removes the destination directory if it's non-empty and all
-  // other checks are passed (so that the copy/move correctly overwrites the
-  // destination).
-  PlatformFileError PerformCommonCheckAndPreparationForMoveAndCopy(
-      FileSystemOperationContext* unused,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path);
-
-  // Performs recursive copy or move by calling CopyOrMoveFile for individual
-  // files. Operations for recursive traversal are encapsulated in this method.
-  // It assumes src_file_path and dest_file_path have passed
-  // PerformCommonCheckAndPreparationForMoveAndCopy().
-  PlatformFileError CopyOrMoveDirectory(
-      FileSystemOperationContext* context,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path,
-      bool copy);
-
-  // Determines whether a simple same-filesystem move or copy can be done.  If
-  // so, it delegates to CopyOrMoveFile.  Otherwise it looks up the true
-  // platform path of the source file, delegates to CopyInForeignFile, and [for
-  // move] calls DeleteFile on the source file.
-  PlatformFileError CopyOrMoveFileHelper(
-      FileSystemOperationContext* context,
-      const FilePath& src_file_path,
-      const FilePath& dest_file_path,
-      bool copy);
-
-  DISALLOW_COPY_AND_ASSIGN(FileSystemFileUtil);
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_H_