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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_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
#define CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
#pragma once
#include <string>
#include <vector>
#include "base/callback.h"
#include "base/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/synchronization/lock.h"
#include "base/time.h"
#include "chrome/common/url_constants.h"
#include "googleurl/src/gurl.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);
~LocalStorageInfo();
bool IsFileSchemeData() {
return protocol == chrome::kFileScheme;
}
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);
protected:
friend class base::RefCountedThreadSafe<BrowsingDataLocalStorageHelper>;
virtual ~BrowsingDataLocalStorageHelper();
// Notifies the completion callback in the UI thread.
void NotifyInUIThread();
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_;
private:
// Enumerates all local storage files in the WEBKIT thread.
void FetchLocalStorageInfoInWebKitThread();
// Delete a single local storage file in the WEBKIT thread.
void DeleteLocalStorageFileInWebKitThread(const FilePath& file_path);
DISALLOW_COPY_AND_ASSIGN(BrowsingDataLocalStorageHelper);
};
// This class is a thin wrapper around BrowsingDataLocalStorageHelper that does
// not fetch its information from the local storage tracker, but gets them
// passed as a parameter during construction.
class CannedBrowsingDataLocalStorageHelper
: public BrowsingDataLocalStorageHelper {
public:
explicit CannedBrowsingDataLocalStorageHelper(Profile* profile);
// Return a copy of the local storage helper. Only one consumer can use the
// StartFetching method at a time, so we need to create a copy of the helper
// everytime we instantiate a cookies tree model for it.
CannedBrowsingDataLocalStorageHelper* Clone();
// Add a local storage to the set of canned local storages that is returned
// by this helper.
void AddLocalStorage(const GURL& origin);
// Clear the list of canned local storages.
void Reset();
// True if no local storages are currently stored.
bool empty() const;
// BrowsingDataLocalStorageHelper methods.
virtual void StartFetching(
Callback1<const std::vector<LocalStorageInfo>& >::Type* callback);
virtual void CancelNotification() {}
private:
virtual ~CannedBrowsingDataLocalStorageHelper();
// Convert the pending local storage info to local storage info objects.
void ConvertPendingInfoInWebKitThread();
// Used to protect access to pending_local_storage_info_.
mutable base::Lock lock_;
// May mutate on WEBKIT and UI threads.
std::vector<GURL> pending_local_storage_info_;
Profile* profile_;
DISALLOW_COPY_AND_ASSIGN(CannedBrowsingDataLocalStorageHelper);
};
#endif // CHROME_BROWSER_BROWSING_DATA_LOCAL_STORAGE_HELPER_H_
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