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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.
#include "webkit/tools/test_shell/simple_file_writer.h"
#include "base/logging.h"
#include "base/message_loop_proxy.h"
#include "net/url_request/url_request_context.h"
#include "webkit/fileapi/file_system_callback_dispatcher.h"
#include "webkit/fileapi/file_system_context.h"
#include "webkit/fileapi/file_system_file_util.h"
#include "webkit/fileapi/file_system_operation.h"
#include "webkit/glue/webkit_glue.h"
#include "webkit/tools/test_shell/simple_resource_loader_bridge.h"
using fileapi::FileSystemCallbackDispatcher;
using fileapi::FileSystemContext;
using fileapi::FileSystemFileUtil;
using fileapi::FileSystemOperation;
using fileapi::WebFileWriterBase;
using WebKit::WebFileWriterClient;
using WebKit::WebString;
using WebKit::WebURL;
net::URLRequestContext* SimpleFileWriter::request_context_ = NULL;
// Helper class to proxy to write and truncate calls to the IO thread,
// and to proxy the results back to the main thead. There is a one-to-one
// relationship between SimpleFileWriters and IOThreadBackends.
class SimpleFileWriter::IOThreadProxy
: public base::RefCountedThreadSafe<SimpleFileWriter::IOThreadProxy> {
public:
explicit IOThreadProxy(const base::WeakPtr<SimpleFileWriter>& simple_writer,
FileSystemContext* file_system_context)
: simple_writer_(simple_writer),
operation_(NULL),
file_system_context_(file_system_context) {
// The IO thread needs to be running for this class to work.
SimpleResourceLoaderBridge::EnsureIOThread();
io_thread_ = SimpleResourceLoaderBridge::GetIoThread();
main_thread_ = base::MessageLoopProxy::CreateForCurrentThread();
}
virtual ~IOThreadProxy() {
}
void Truncate(const FilePath& path, int64 offset) {
if (!io_thread_->BelongsToCurrentThread()) {
io_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::Truncate, path, offset));
return;
}
DCHECK(!operation_);
operation_ = GetNewOperation();
operation_->Truncate(path, offset);
}
void Write(const FilePath& path, const GURL& blob_url, int64 offset) {
if (!io_thread_->BelongsToCurrentThread()) {
io_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::Write, path, blob_url, offset));
return;
}
DCHECK(request_context_);
DCHECK(!operation_);
operation_ = GetNewOperation();
operation_->Write(request_context_, path, blob_url, offset);
}
void Cancel() {
if (!io_thread_->BelongsToCurrentThread()) {
io_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::Cancel));
return;
}
if (!operation_) {
DidFail(base::PLATFORM_FILE_ERROR_INVALID_OPERATION);
return;
}
operation_->Cancel(GetNewOperation());
}
private:
// Inner class to receive callbacks from FileSystemOperation.
class CallbackDispatcher : public FileSystemCallbackDispatcher {
public:
explicit CallbackDispatcher(IOThreadProxy* proxy) : proxy_(proxy) {
}
~CallbackDispatcher() {
proxy_->ClearOperation();
}
virtual void DidSucceed() {
proxy_->DidSucceed();
}
virtual void DidFail(base::PlatformFileError error_code) {
proxy_->DidFail(error_code);
}
virtual void DidWrite(int64 bytes, bool complete) {
proxy_->DidWrite(bytes, complete);
}
virtual void DidReadMetadata(
const base::PlatformFileInfo&,
const FilePath&) {
NOTREACHED();
}
virtual void DidReadDirectory(
const std::vector<base::FileUtilProxy::Entry>& entries,
bool has_more) {
NOTREACHED();
}
virtual void DidOpenFileSystem(
const std::string& name,
const FilePath& root_path) {
NOTREACHED();
}
scoped_refptr<IOThreadProxy> proxy_;
};
FileSystemOperation* GetNewOperation() {
// The FileSystemOperation takes ownership of the CallbackDispatcher.
return new FileSystemOperation(new CallbackDispatcher(this),
io_thread_, file_system_context_.get(),
NULL);
}
void DidSucceed() {
if (!main_thread_->BelongsToCurrentThread()) {
main_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::DidSucceed));
return;
}
if (simple_writer_)
simple_writer_->DidSucceed();
}
void DidFail(base::PlatformFileError error_code) {
if (!main_thread_->BelongsToCurrentThread()) {
main_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::DidFail, error_code));
return;
}
if (simple_writer_)
simple_writer_->DidFail(error_code);
}
void DidWrite(int64 bytes, bool complete) {
if (!main_thread_->BelongsToCurrentThread()) {
main_thread_->PostTask(FROM_HERE, NewRunnableMethod(
this, &IOThreadProxy::DidWrite, bytes, complete));
return;
}
if (simple_writer_)
simple_writer_->DidWrite(bytes, complete);
}
void ClearOperation() {
DCHECK(io_thread_->BelongsToCurrentThread());
operation_ = NULL;
}
scoped_refptr<base::MessageLoopProxy> io_thread_;
scoped_refptr<base::MessageLoopProxy> main_thread_;
// Only used on the main thread.
base::WeakPtr<SimpleFileWriter> simple_writer_;
// Only used on the io thread.
FileSystemOperation* operation_;
scoped_refptr<FileSystemContext> file_system_context_;
};
SimpleFileWriter::SimpleFileWriter(
const WebString& path,
WebFileWriterClient* client,
FileSystemContext* file_system_context)
: WebFileWriterBase(path, client),
io_thread_proxy_(new IOThreadProxy(AsWeakPtr(), file_system_context)) {
}
SimpleFileWriter::~SimpleFileWriter() {
}
void SimpleFileWriter::DoTruncate(const FilePath& path, int64 offset) {
io_thread_proxy_->Truncate(path, offset);
}
void SimpleFileWriter::DoWrite(
const FilePath& path, const GURL& blob_url, int64 offset) {
io_thread_proxy_->Write(path, blob_url, offset);
}
void SimpleFileWriter::DoCancel() {
io_thread_proxy_->Cancel();
}
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