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

webkit/fileapi/local_file_util.cc

 // 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.
 
-#include "webkit/fileapi/local_file_system_file_util.h"
+#include "webkit/fileapi/local_file_util.h"
 
 #include "base/file_util_proxy.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_operation_context.h"
 #include "webkit/fileapi/file_system_path_manager.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/fileapi/file_system_util.h"
 
 namespace fileapi {
 
-LocalFileSystemFileUtil::LocalFileSystemFileUtil(
-    FileSystemFileUtil* underlying_file_util)
-    : underlying_file_util_(underlying_file_util) {
+class LocalFileEnumerator : public FileSystemFileUtil::AbstractFileEnumerator {
+ public:
+  LocalFileEnumerator(const FilePath& platform_root_path,
+                                const FilePath& virtual_root_path,
+                                bool recursive,
+                                file_util::FileEnumerator::FileType file_type)
+      : file_enum_(platform_root_path, recursive, file_type),
+        platform_root_path_(platform_root_path),
+        virtual_root_path_(virtual_root_path) {
+  }
+
+  ~LocalFileEnumerator() {}
+
+  virtual FilePath Next() OVERRIDE;
+  virtual int64 Size() OVERRIDE;
+  virtual bool IsDirectory() OVERRIDE;
+
+ private:
+  file_util::FileEnumerator file_enum_;
+  file_util::FileEnumerator::FindInfo file_util_info_;
+  FilePath platform_root_path_;
+  FilePath virtual_root_path_;
+};
+
+FilePath LocalFileEnumerator::Next() {
+  FilePath next = file_enum_.Next();
+  if (next.empty())
+    return next;
+  file_enum_.GetFindInfo(&file_util_info_);
+
+  FilePath path;
+  platform_root_path_.AppendRelativePath(next, &path);
+  return virtual_root_path_.Append(path);
 }
 
-LocalFileSystemFileUtil::~LocalFileSystemFileUtil() {
+int64 LocalFileEnumerator::Size() {
+  return file_util::FileEnumerator::GetFilesize(file_util_info_);
 }
 
-PlatformFileError LocalFileSystemFileUtil::CreateOrOpen(
+bool LocalFileEnumerator::IsDirectory() {
+  return file_util::FileEnumerator::IsDirectory(file_util_info_);
+}
+
+LocalFileUtil::LocalFileUtil(FileSystemFileUtil* underlying_file_util)
+    : FileSystemFileUtil(underlying_file_util) {
+}
+
+LocalFileUtil::~LocalFileUtil() {
+}
+
+PlatformFileError LocalFileUtil::CreateOrOpen(
     FileSystemOperationContext* context,
     const FilePath& file_path, int file_flags,
     PlatformFile* file_handle, bool* created) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->CreateOrOpen(
+  return underlying_file_util()->CreateOrOpen(
       context, local_path, file_flags, file_handle, created);
 }
 
-PlatformFileError LocalFileSystemFileUtil::EnsureFileExists(
+PlatformFileError LocalFileUtil::EnsureFileExists(
     FileSystemOperationContext* context,
     const FilePath& file_path,
     bool* created) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->EnsureFileExists(
+  return underlying_file_util()->EnsureFileExists(
       context, local_path, created);
 }
 
-PlatformFileError LocalFileSystemFileUtil::GetLocalFilePath(
+PlatformFileError LocalFileUtil::CreateDirectory(
     FileSystemOperationContext* context,
-    const FilePath& virtual_path,
-    FilePath* local_path) {
-  FilePath path =
+    const FilePath& file_path,
+    bool exclusive,
+    bool recursive) {
+  FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
-                   virtual_path);
-  if (path.empty())
-    return base::PLATFORM_FILE_ERROR_NOT_FOUND;
-
-  *local_path = path;
-  return base::PLATFORM_FILE_OK;
+          file_path);
+  if (local_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  return underlying_file_util()->CreateDirectory(
+      context, local_path, exclusive, recursive);
 }
 
-PlatformFileError LocalFileSystemFileUtil::GetFileInfo(
+PlatformFileError LocalFileUtil::GetFileInfo(
     FileSystemOperationContext* context,
     const FilePath& file_path,
     base::PlatformFileInfo* file_info,
     FilePath* platform_file_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->GetFileInfo(
+  return underlying_file_util()->GetFileInfo(
       context, local_path, file_info, platform_file_path);
 }
 
-PlatformFileError LocalFileSystemFileUtil::ReadDirectory(
+PlatformFileError LocalFileUtil::ReadDirectory(
     FileSystemOperationContext* context,
     const FilePath& file_path,
     std::vector<base::FileUtilProxy::Entry>* entries) {
   // TODO(kkanetkar): Implement directory read in multiple chunks.
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->ReadDirectory(
+  return underlying_file_util()->ReadDirectory(
       context, local_path, entries);
 }
 
-PlatformFileError LocalFileSystemFileUtil::CreateDirectory(
+FileSystemFileUtil::AbstractFileEnumerator* LocalFileUtil::CreateFileEnumerator(
     FileSystemOperationContext* context,
-    const FilePath& file_path,
-    bool exclusive,
-    bool recursive) {
+    const FilePath& root_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
-          file_path);
+          root_path);
   if (local_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->CreateDirectory(
-      context, local_path, exclusive, recursive);
+    return new EmptyFileEnumerator();
+  return new LocalFileEnumerator(
+      local_path, root_path, true,
+      static_cast<file_util::FileEnumerator::FileType>(
+          file_util::FileEnumerator::FILES |
+          file_util::FileEnumerator::DIRECTORIES));
 }
 
-PlatformFileError LocalFileSystemFileUtil::CopyOrMoveFile(
+PlatformFileError LocalFileUtil::GetLocalFilePath(
     FileSystemOperationContext* context,
-    const FilePath& src_file_path,
-    const FilePath& dest_file_path,
-    bool copy) {
-  // TODO(ericu): If they share a root URL, this could be optimized.
-  FilePath local_src_path =
+    const FilePath& virtual_path,
+    FilePath* local_path) {
+  FilePath path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
-          src_file_path);
-  if (local_src_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  FilePath local_dest_path =
-      GetLocalPath(context, context->dest_origin_url(), context->dest_type(),
-          dest_file_path);
-  if (local_dest_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->CopyOrMoveFile(
-      context, local_src_path, local_dest_path, copy);
+                   virtual_path);
+  if (path.empty())
+    return base::PLATFORM_FILE_ERROR_NOT_FOUND;
+
+  *local_path = path;
+  return base::PLATFORM_FILE_OK;
 }
 
-// TODO(dmikurube): Make it independent from CopyOrMoveFile.
-PlatformFileError LocalFileSystemFileUtil::CopyInForeignFile(
-    FileSystemOperationContext* context,
-    const FilePath& src_file_path,
-    const FilePath& dest_file_path) {
-  if (src_file_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  FilePath local_dest_path =
-      GetLocalPath(context, context->dest_origin_url(), context->dest_type(),
-          dest_file_path);
-  if (local_dest_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->CopyOrMoveFile(
-      context, src_file_path, local_dest_path, true);
-}
-
-PlatformFileError LocalFileSystemFileUtil::DeleteFile(
-    FileSystemOperationContext* context,
-    const FilePath& file_path) {
-  FilePath local_path =
-      GetLocalPath(context, context->src_origin_url(), context->src_type(),
-          file_path);
-  if (local_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->DeleteFile(
-      context, local_path);
-}
-
-PlatformFileError LocalFileSystemFileUtil::DeleteSingleDirectory(
-    FileSystemOperationContext* context,
-    const FilePath& file_path) {
-  FilePath local_path =
-      GetLocalPath(context, context->src_origin_url(), context->src_type(),
-          file_path);
-  if (local_path.empty())
-    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->DeleteSingleDirectory(
-      context, local_path);
-}
-
-PlatformFileError LocalFileSystemFileUtil::Touch(
+PlatformFileError LocalFileUtil::Touch(
     FileSystemOperationContext* context,
     const FilePath& file_path,
     const base::Time& last_access_time,
     const base::Time& last_modified_time) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->Touch(
+  return underlying_file_util()->Touch(
       context, local_path, last_access_time, last_modified_time);
 }
 
-PlatformFileError LocalFileSystemFileUtil::Truncate(
+PlatformFileError LocalFileUtil::Truncate(
     FileSystemOperationContext* context,
     const FilePath& file_path,
     int64 length) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
-  return underlying_file_util_->Truncate(
+  return underlying_file_util()->Truncate(
       context, local_path, length);
 }
 
-bool LocalFileSystemFileUtil::PathExists(
+bool LocalFileUtil::PathExists(
     FileSystemOperationContext* context,
     const FilePath& file_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return false;
-  return underlying_file_util_->PathExists(
+  return underlying_file_util()->PathExists(
       context, local_path);
 }
 
-bool LocalFileSystemFileUtil::DirectoryExists(
+bool LocalFileUtil::DirectoryExists(
     FileSystemOperationContext* context,
     const FilePath& file_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return false;
-  return underlying_file_util_->DirectoryExists(
+  return underlying_file_util()->DirectoryExists(
       context, local_path);
 }
 
-bool LocalFileSystemFileUtil::IsDirectoryEmpty(
+bool LocalFileUtil::IsDirectoryEmpty(
     FileSystemOperationContext* context,
     const FilePath& file_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
           file_path);
   if (local_path.empty())
     return true;
-  return underlying_file_util_->IsDirectoryEmpty(
+  return underlying_file_util()->IsDirectoryEmpty(
       context, local_path);
 }
 
-class LocalFileSystemFileEnumerator
-    : public FileSystemFileUtil::AbstractFileEnumerator {
- public:
-  LocalFileSystemFileEnumerator(const FilePath& platform_root_path,
-                                const FilePath& virtual_root_path,
-                                bool recursive,
-                                file_util::FileEnumerator::FileType file_type)
-      : file_enum_(platform_root_path, recursive, file_type),
-        platform_root_path_(platform_root_path),
-        virtual_root_path_(virtual_root_path) {
-  }
-
-  ~LocalFileSystemFileEnumerator() {}
-
-  virtual FilePath Next() OVERRIDE;
-  virtual int64 Size() OVERRIDE;
-  virtual bool IsDirectory() OVERRIDE;
-
- private:
-  file_util::FileEnumerator file_enum_;
-  file_util::FileEnumerator::FindInfo file_util_info_;
-  FilePath platform_root_path_;
-  FilePath virtual_root_path_;
-};
-
-FilePath LocalFileSystemFileEnumerator::Next() {
-  FilePath next = file_enum_.Next();
-  if (next.empty())
-    return next;
-  file_enum_.GetFindInfo(&file_util_info_);
-
-  FilePath path;
-  platform_root_path_.AppendRelativePath(next, &path);
-  return virtual_root_path_.Append(path);
+PlatformFileError LocalFileUtil::CopyOrMoveFile(
+    FileSystemOperationContext* context,
+    const FilePath& src_file_path,
+    const FilePath& dest_file_path,
+    bool copy) {
+  // TODO(ericu): If they share a root URL, this could be optimized.
+  FilePath local_src_path =
+      GetLocalPath(context, context->src_origin_url(), context->src_type(),
+          src_file_path);
+  if (local_src_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  FilePath local_dest_path =
+      GetLocalPath(context, context->dest_origin_url(), context->dest_type(),
+          dest_file_path);
+  if (local_dest_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  return underlying_file_util()->CopyOrMoveFile(
+      context, local_src_path, local_dest_path, copy);
 }
 
-int64 LocalFileSystemFileEnumerator::Size() {
-  return file_util::FileEnumerator::GetFilesize(file_util_info_);
+// TODO(dmikurube): Make it independent from CopyOrMoveFile.
+PlatformFileError LocalFileUtil::CopyInForeignFile(
+    FileSystemOperationContext* context,
+    const FilePath& src_file_path,
+    const FilePath& dest_file_path) {
+  if (src_file_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  FilePath local_dest_path =
+      GetLocalPath(context, context->dest_origin_url(), context->dest_type(),
+          dest_file_path);
+  if (local_dest_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  return underlying_file_util()->CopyOrMoveFile(
+      context, src_file_path, local_dest_path, true);
 }
 
-bool LocalFileSystemFileEnumerator::IsDirectory() {
-  return file_util::FileEnumerator::IsDirectory(file_util_info_);
+PlatformFileError LocalFileUtil::DeleteFile(
+    FileSystemOperationContext* context,
+    const FilePath& file_path) {
+  FilePath local_path =
+      GetLocalPath(context, context->src_origin_url(), context->src_type(),
+          file_path);
+  if (local_path.empty())
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  return underlying_file_util()->DeleteFile(
+      context, local_path);
 }
 
-FileSystemFileUtil::AbstractFileEnumerator*
-LocalFileSystemFileUtil::CreateFileEnumerator(
+PlatformFileError LocalFileUtil::DeleteSingleDirectory(
     FileSystemOperationContext* context,
-    const FilePath& root_path) {
+    const FilePath& file_path) {
   FilePath local_path =
       GetLocalPath(context, context->src_origin_url(), context->src_type(),
-          root_path);
+          file_path);
   if (local_path.empty())
-    return new EmptyFileEnumerator();
-  return new LocalFileSystemFileEnumerator(
-      local_path, root_path, true,
-      static_cast<file_util::FileEnumerator::FileType>(
-          file_util::FileEnumerator::FILES |
-          file_util::FileEnumerator::DIRECTORIES));
+    return base::PLATFORM_FILE_ERROR_INVALID_OPERATION;
+  return underlying_file_util()->DeleteSingleDirectory(
+      context, local_path);
 }
 
-FilePath LocalFileSystemFileUtil::GetLocalPath(
+FilePath LocalFileUtil::GetLocalPath(
     FileSystemOperationContext* context,
     const GURL& origin_url,
     FileSystemType type,
     const FilePath& virtual_path) {
   FilePath root = context->file_system_context()->path_manager()->
       ValidateFileSystemRootAndGetPathOnFileThread(origin_url, type,
           virtual_path, false);
   if (root.empty())
     return FilePath();
   return root.Append(virtual_path);
 }
 
 }  // namespace fileapi