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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.
#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_FRONTEND_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_FRONTEND_H_
#pragma once
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "base/callback.h"
#include "chrome/browser/sync/api/syncable_service.h"
class FilePath;
class ExtensionSettingsBackend;
class ExtensionSettingsStorage;
// The component of extension settings which runs on the UI thread, as opposed
// to ExtensionSettingsBackend which lives on the FILE thread.
class ExtensionSettingsFrontend {
public:
explicit ExtensionSettingsFrontend(const FilePath& base_path);
typedef base::Callback<void(ExtensionSettingsBackend*)> BackendCallback;
// Runs |callback| on the FILE thread with the extension settings.
void RunWithBackend(const BackendCallback& callback);
~ExtensionSettingsFrontend();
private:
// Ref-counted container for the ExtensionSettingsBackend object.
class Core : public base::RefCountedThreadSafe<Core> {
public:
// Constructed on UI thread.
Core();
// Does any FILE thread specific initialization, such as construction of
// |backend_|. Must be called before any call to
// RunWithBackendOnFileThread().
void InitOnFileThread(const FilePath& base_path);
// Runs |callback| with the extension backend.
void RunWithBackendOnFileThread(const BackendCallback& callback);
private:
// Can be destroyed on either the UI or FILE thread.
virtual ~Core();
friend class base::RefCountedThreadSafe<Core>;
// Lives on the FILE thread.
ExtensionSettingsBackend* backend_;
DISALLOW_COPY_AND_ASSIGN(Core);
};
scoped_refptr<Core> core_;
DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsFrontend);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_FRONTEND_H_
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