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// Copyright (c) 2010 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_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
#define CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
#include <string>
#include "base/file_path.h"
#include "base/scoped_ptr.h"
#include "base/task.h"
class Profile;
// This class fetches local storage information in the WebKit thread, and
// notifies the UI thread upon completion.
// A client of this class need to call StartFetching from the UI thread to
// initiate the flow, and it'll be notified by the callback in its UI
// thread at some later point.
// The client must call CancelNotification() if it's destroyed before the
// callback is notified.
class BrowsingDataLocalStorageHelper
: public base::RefCountedThreadSafe<BrowsingDataLocalStorageHelper> {
public:
// Contains detailed information about local storage.
struct LocalStorageInfo {
LocalStorageInfo() {}
LocalStorageInfo(
const std::string& protocol,
const std::string& host,
unsigned short port,
const std::string& database_identifier,
const std::string& origin,
const FilePath& file_path,
int64 size,
base::Time last_modified)
: protocol(protocol),
host(host),
port(port),
database_identifier(database_identifier),
origin(origin),
file_path(file_path),
size(size),
last_modified(last_modified) {
}
std::string protocol;
std::string host;
unsigned short port;
std::string database_identifier;
std::string origin;
FilePath file_path;
int64 size;
base::Time last_modified;
};
explicit BrowsingDataLocalStorageHelper(Profile* profile);
// Starts the fetching process, which will notify its completion via
// callback.
// This must be called only in the UI thread.
virtual void StartFetching(
Callback1<const std::vector<LocalStorageInfo>& >::Type* callback);
// Cancels the notification callback (i.e., the window that created it no
// longer exists).
// This must be called only in the UI thread.
virtual void CancelNotification();
// Requests a single local storage file to be deleted in the WEBKIT thread.
virtual void DeleteLocalStorageFile(const FilePath& file_path);
private:
friend class base::RefCountedThreadSafe<BrowsingDataLocalStorageHelper>;
friend class MockBrowsingDataLocalStorageHelper;
virtual ~BrowsingDataLocalStorageHelper();
// Enumerates all local storage files in the WEBKIT thread.
void FetchLocalStorageInfoInWebKitThread();
// Notifies the completion callback in the UI thread.
void NotifyInUIThread();
// Delete a single local storage file in the WEBKIT thread.
void DeleteLocalStorageFileInWebKitThread(const FilePath& file_path);
Profile* profile_;
// This only mutates on the UI thread.
scoped_ptr<Callback1<const std::vector<LocalStorageInfo>& >::Type >
completion_callback_;
// Indicates whether or not we're currently fetching information:
// it's true when StartFetching() is called in the UI thread, and it's reset
// after we notified the callback in the UI thread.
// This only mutates on the UI thread.
bool is_fetching_;
// This only mutates in the WEBKIT thread.
std::vector<LocalStorageInfo> local_storage_info_;
DISALLOW_COPY_AND_ASSIGN(BrowsingDataLocalStorageHelper);
};
#endif // CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
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