// 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_DATA_DELETER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
#pragma once
#include "base/memory/ref_counted.h"
#include "base/string16.h"
#include "content/browser/browser_thread.h"
#include "googleurl/src/gurl.h"
namespace webkit_database {
class DatabaseTracker;
}
namespace fileapi {
class FileSystemContext;
}
class Profile;
class WebKitContext;
namespace net {
class URLRequestContextGetter;
}
// A helper class that takes care of removing local storage, databases and
// cookies for a given extension. This is used by
// ExtensionService::ClearExtensionData() upon uninstalling an extension.
class ExtensionDataDeleter
: public base::RefCountedThreadSafe<ExtensionDataDeleter,
BrowserThread::DeleteOnUIThread> {
public:
ExtensionDataDeleter(Profile* profile, const GURL& extension_url);
// Start removing data. The extension should not be running when this is
// called. Cookies are deleted on the current thread, local storage and
// databases are deleted asynchronously on the webkit and file threads,
// respectively. This function must be called from the UI thread.
void StartDeleting();
private:
friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
friend class DeleteTask<ExtensionDataDeleter>;
~ExtensionDataDeleter();
// Deletes the cookies for the extension. May only be called on the io
// thread.
void DeleteCookiesOnIOThread();
// Deletes the database for the extension. May only be called on the file
// thread.
void DeleteDatabaseOnFileThread();
// Deletes local storage for the extension. May only be called on the webkit
// thread.
void DeleteLocalStorageOnWebkitThread();
// Deletes indexed db files for the extension. May only be called on the
// webkit thread.
void DeleteIndexedDBOnWebkitThread();
// Deletes filesystem files for the extension. May only be called on the
// file thread.
void DeleteFileSystemOnFileThread();
// The database context for deleting the database.
scoped_refptr<webkit_database::DatabaseTracker> database_tracker_;
// Provides access to the extension request context.
scoped_refptr<net::URLRequestContextGetter> extension_request_context_;
// The URL of the extension we're removing data for.
GURL extension_url_;
// The security origin identifier for which we're deleting stuff.
string16 origin_id_;
// Webkit context for accessing the DOM storage helper.
scoped_refptr<WebKitContext> webkit_context_;
scoped_refptr<fileapi::FileSystemContext> file_system_context_;
DISALLOW_COPY_AND_ASSIGN(ExtensionDataDeleter);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_