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// Copyright 2016 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 COMPONENTS_SESSIONS_CONTENT_EXTENDED_INFO_HANDLER_H_
#define COMPONENTS_SESSIONS_CONTENT_EXTENDED_INFO_HANDLER_H_
#include <string>
#include "components/sessions/core/sessions_export.h"
namespace content {
class NavigationEntry;
}
namespace sessions {
// This interface is used to store and retrieve arbitrary key/value pairs for
// a NavigationEntry that are not a core part of NavigationEntry.
// WARNING: implementations must deal with versioning. In particular
// RestoreExtendedInfo() may be called with data from a previous version of
// Chrome.
class SESSIONS_EXPORT ExtendedInfoHandler {
public:
ExtendedInfoHandler() {}
virtual ~ExtendedInfoHandler() {}
// Returns the data to write to disk for the specified NavigationEntry.
virtual std::string GetExtendedInfo(
const content::NavigationEntry& entry) const = 0;
// Restores |info| which was obtained from a previous call to
// GetExtendedInfo() to a NavigationEntry.
virtual void RestoreExtendedInfo(const std::string& info,
content::NavigationEntry* entry) = 0;
};
} // namespace sessions
#endif // COMPONENTS_SESSIONS_CONTENT_EXTENDED_INFO_HANDLER_H_
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