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// Copyright 2013 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 CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
#define CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
#include <map>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/threading/non_thread_safe.h"
#include "content/public/child/worker_thread.h"
#include "third_party/WebKit/public/platform/WebFileSystem.h"
namespace base {
class WaitableEvent;
class SingleThreadTaskRunner;
}
namespace blink {
class WebURL;
class WebFileWriter;
class WebFileWriterClient;
}
namespace content {
class WebFileSystemImpl : public blink::WebFileSystem,
public WorkerThread::Observer,
public base::NonThreadSafe {
public:
class WaitableCallbackResults;
// Returns thread-specific instance. If non-null |main_thread_loop|
// is given and no thread-specific instance has been created it may
// create a new instance.
static WebFileSystemImpl* ThreadSpecificInstance(
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner);
// Deletes thread-specific instance (if exists). For workers it deletes
// itself in WillStopCurrentWorkerThread(), but for an instance created on the
// main thread this method must be called.
static void DeleteThreadSpecificInstance();
explicit WebFileSystemImpl(
const scoped_refptr<base::SingleThreadTaskRunner>&
main_thread_task_runner);
~WebFileSystemImpl() override;
// WorkerThread::Observer implementation.
void WillStopCurrentWorkerThread() override;
// WebFileSystem implementation.
void openFileSystem(const blink::WebURL& storage_partition,
const blink::WebFileSystemType type,
blink::WebFileSystemCallbacks) override;
void resolveURL(const blink::WebURL& filesystem_url,
blink::WebFileSystemCallbacks) override;
void deleteFileSystem(const blink::WebURL& storage_partition,
const blink::WebFileSystemType type,
blink::WebFileSystemCallbacks) override;
void move(const blink::WebURL& src_path,
const blink::WebURL& dest_path,
blink::WebFileSystemCallbacks) override;
void copy(const blink::WebURL& src_path,
const blink::WebURL& dest_path,
blink::WebFileSystemCallbacks) override;
void remove(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
void removeRecursively(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
void readMetadata(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
void createFile(const blink::WebURL& path,
bool exclusive,
blink::WebFileSystemCallbacks) override;
void createDirectory(const blink::WebURL& path,
bool exclusive,
blink::WebFileSystemCallbacks) override;
void fileExists(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
void directoryExists(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
int readDirectory(const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
void createFileWriter(const blink::WebURL& path,
blink::WebFileWriterClient*,
blink::WebFileSystemCallbacks) override;
void createSnapshotFileAndReadMetadata(
const blink::WebURL& path,
blink::WebFileSystemCallbacks) override;
bool waitForAdditionalResult(int callbacksId) override;
int RegisterCallbacks(const blink::WebFileSystemCallbacks& callbacks);
blink::WebFileSystemCallbacks GetCallbacks(int callbacks_id);
void UnregisterCallbacks(int callbacks_id);
private:
typedef std::map<int, blink::WebFileSystemCallbacks> CallbacksMap;
typedef std::map<int, scoped_refptr<WaitableCallbackResults> >
WaitableCallbackResultsMap;
WaitableCallbackResults* MaybeCreateWaitableResults(
const blink::WebFileSystemCallbacks& callbacks, int callbacks_id);
scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
CallbacksMap callbacks_;
int next_callbacks_id_;
WaitableCallbackResultsMap waitable_results_;
DISALLOW_COPY_AND_ASSIGN(WebFileSystemImpl);
};
} // namespace content
#endif // CONTENT_CHILD_FILEAPI_WEBFILESYSTEM_IMPL_H_
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