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// 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.
#include "storage/browser/fileapi/isolated_file_system_backend.h"
#include <string>
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/files/file_util_proxy.h"
#include "base/logging.h"
#include "base/sequenced_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "storage/browser/fileapi/async_file_util_adapter.h"
#include "storage/browser/fileapi/copy_or_move_file_validator.h"
#include "storage/browser/fileapi/dragged_file_util.h"
#include "storage/browser/fileapi/file_stream_reader.h"
#include "storage/browser/fileapi/file_stream_writer.h"
#include "storage/browser/fileapi/file_system_context.h"
#include "storage/browser/fileapi/file_system_operation.h"
#include "storage/browser/fileapi/file_system_operation_context.h"
#include "storage/browser/fileapi/isolated_context.h"
#include "storage/browser/fileapi/native_file_util.h"
#include "storage/browser/fileapi/transient_file_util.h"
#include "storage/browser/fileapi/watcher_manager.h"
#include "storage/common/fileapi/file_system_types.h"
#include "storage/common/fileapi/file_system_util.h"
namespace storage {
IsolatedFileSystemBackend::IsolatedFileSystemBackend(
bool use_for_type_native_local,
bool use_for_type_platform_app)
: use_for_type_native_local_(use_for_type_native_local),
use_for_type_platform_app_(use_for_type_platform_app),
isolated_file_util_(new AsyncFileUtilAdapter(new LocalFileUtil())),
dragged_file_util_(new AsyncFileUtilAdapter(new DraggedFileUtil())),
transient_file_util_(new AsyncFileUtilAdapter(new TransientFileUtil())) {
}
IsolatedFileSystemBackend::~IsolatedFileSystemBackend() {
}
bool IsolatedFileSystemBackend::CanHandleType(FileSystemType type) const {
switch (type) {
case kFileSystemTypeIsolated:
case kFileSystemTypeDragged:
case kFileSystemTypeForTransientFile:
return true;
case kFileSystemTypeNativeLocal:
return use_for_type_native_local_;
case kFileSystemTypeNativeForPlatformApp:
return use_for_type_platform_app_;
default:
return false;
}
}
void IsolatedFileSystemBackend::Initialize(FileSystemContext* context) {
}
void IsolatedFileSystemBackend::ResolveURL(
const FileSystemURL& url,
OpenFileSystemMode mode,
const OpenFileSystemCallback& callback) {
// We never allow opening a new isolated FileSystem via usual ResolveURL.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(callback,
GURL(),
std::string(),
base::File::FILE_ERROR_SECURITY));
}
AsyncFileUtil* IsolatedFileSystemBackend::GetAsyncFileUtil(
FileSystemType type) {
switch (type) {
case kFileSystemTypeNativeLocal:
return isolated_file_util_.get();
case kFileSystemTypeDragged:
return dragged_file_util_.get();
case kFileSystemTypeForTransientFile:
return transient_file_util_.get();
default:
NOTREACHED();
}
return NULL;
}
WatcherManager* IsolatedFileSystemBackend::GetWatcherManager(
FileSystemType type) {
return NULL;
}
CopyOrMoveFileValidatorFactory*
IsolatedFileSystemBackend::GetCopyOrMoveFileValidatorFactory(
FileSystemType type, base::File::Error* error_code) {
DCHECK(error_code);
*error_code = base::File::FILE_OK;
return NULL;
}
FileSystemOperation* IsolatedFileSystemBackend::CreateFileSystemOperation(
const FileSystemURL& url,
FileSystemContext* context,
base::File::Error* error_code) const {
return FileSystemOperation::Create(
url, context, make_scoped_ptr(new FileSystemOperationContext(context)));
}
bool IsolatedFileSystemBackend::SupportsStreaming(
const storage::FileSystemURL& url) const {
return false;
}
bool IsolatedFileSystemBackend::HasInplaceCopyImplementation(
storage::FileSystemType type) const {
DCHECK(type == kFileSystemTypeNativeLocal || type == kFileSystemTypeDragged ||
type == kFileSystemTypeForTransientFile);
return false;
}
scoped_ptr<storage::FileStreamReader>
IsolatedFileSystemBackend::CreateFileStreamReader(
const FileSystemURL& url,
int64 offset,
int64 max_bytes_to_read,
const base::Time& expected_modification_time,
FileSystemContext* context) const {
return scoped_ptr<storage::FileStreamReader>(
storage::FileStreamReader::CreateForLocalFile(
context->default_file_task_runner(),
url.path(),
offset,
expected_modification_time));
}
scoped_ptr<FileStreamWriter> IsolatedFileSystemBackend::CreateFileStreamWriter(
const FileSystemURL& url,
int64 offset,
FileSystemContext* context) const {
return scoped_ptr<FileStreamWriter>(
FileStreamWriter::CreateForLocalFile(
context->default_file_task_runner(),
url.path(),
offset,
FileStreamWriter::OPEN_EXISTING_FILE));
}
FileSystemQuotaUtil* IsolatedFileSystemBackend::GetQuotaUtil() {
// No quota support.
return NULL;
}
const UpdateObserverList* IsolatedFileSystemBackend::GetUpdateObservers(
FileSystemType type) const {
return NULL;
}
const ChangeObserverList* IsolatedFileSystemBackend::GetChangeObservers(
FileSystemType type) const {
return NULL;
}
const AccessObserverList* IsolatedFileSystemBackend::GetAccessObservers(
FileSystemType type) const {
return NULL;
}
} // namespace storage
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