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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_QUOTA_HELPER_H_
#define CHROME_BROWSER_BROWSING_DATA_QUOTA_HELPER_H_
#pragma once
#include <list>
#include <string>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop_proxy.h"
#include "base/time.h"
#include "content/public/browser/browser_thread.h"
#include "webkit/quota/quota_types.h"
class BrowsingDataQuotaHelper;
class Profile;
struct BrowsingDataQuotaHelperDeleter {
static void Destruct(const BrowsingDataQuotaHelper* helper);
};
// This class is an interface class to bridge between Cookies Tree and Unified
// Quota System. This class provides a way to get usage and quota information
// through the instance.
//
// Call Create to create an instance for a profile and call StartFetching with
// a callback to fetch information asynchronously. If result is no longer needed
// after StartFetching, call CancelNotification to prevent callback.
//
// Parallel fetching is not allowed, a fetching task should start after end of
// previous task. All method of this class should called from UI thread.
class BrowsingDataQuotaHelper
: public base::RefCountedThreadSafe<BrowsingDataQuotaHelper,
BrowsingDataQuotaHelperDeleter> {
public:
// QuotaInfo contains host-based quota and usage information for persistent
// and temporary storage.
struct QuotaInfo {
QuotaInfo();
explicit QuotaInfo(const std::string& host);
QuotaInfo(const std::string& host,
int64 temporary_usage,
int64 persistent_usage);
~QuotaInfo();
// Certain versions of MSVC 2008 have bad implementations of ADL for nested
// classes so they require these operators to be declared here instead of in
// the global namespace.
bool operator <(const QuotaInfo& rhs) const;
bool operator ==(const QuotaInfo& rhs) const;
std::string host;
int64 temporary_usage;
int64 persistent_usage;
};
typedef std::list<QuotaInfo> QuotaInfoArray;
typedef base::Callback<void(const QuotaInfoArray&)> FetchResultCallback;
static BrowsingDataQuotaHelper* Create(Profile* profile);
virtual void StartFetching(const FetchResultCallback& callback) = 0;
virtual void CancelNotification() = 0;
virtual void RevokeHostQuota(const std::string& host) = 0;
protected:
explicit BrowsingDataQuotaHelper(base::MessageLoopProxy* io_thread_);
virtual ~BrowsingDataQuotaHelper();
private:
friend class DeleteTask<const BrowsingDataQuotaHelper>;
friend struct BrowsingDataQuotaHelperDeleter;
scoped_refptr<base::MessageLoopProxy> io_thread_;
DISALLOW_COPY_AND_ASSIGN(BrowsingDataQuotaHelper);
};
#endif // CHROME_BROWSER_BROWSING_DATA_QUOTA_HELPER_H_
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