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/**
* @file llteleporthistorystorage.h
* @brief Saving/restoring of teleport history.
*
* $LicenseInfo:firstyear=2009&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_LLTELEPORTHISTORYSTORAGE_H
#define LL_LLTELEPORTHISTORYSTORAGE_H
#include <vector>
#include "llsingleton.h"
#include "lldate.h"
#include "v3dmath.h"
class LLSD;
/**
* An item of the teleport history, stored in file
*
* Contains the location's global coordinates, title and date.
*/
class LLTeleportHistoryPersistentItem
{
public:
LLTeleportHistoryPersistentItem()
{}
LLTeleportHistoryPersistentItem(const std::string title, const LLVector3d& global_pos)
: mTitle(title), mGlobalPos(global_pos), mDate(LLDate::now())
{}
LLTeleportHistoryPersistentItem(const std::string title, const LLVector3d& global_pos, const LLDate& date)
: mTitle(title), mGlobalPos(global_pos), mDate(date)
{}
LLTeleportHistoryPersistentItem(const LLSD& val);
LLSD toLLSD() const;
std::string mTitle;
LLVector3d mGlobalPos;
LLDate mDate;
};
/**
* Persistent teleport history.
*
*/
class LLTeleportHistoryStorage: public LLSingleton<LLTeleportHistoryStorage>
{
LOG_CLASS(LLTeleportHistoryStorage);
public:
typedef std::vector<LLTeleportHistoryPersistentItem> slurl_list_t;
// removed_index is index of removed item, which replaced by more recent
typedef boost::function<void(S32 removed_index)> history_callback_t;
typedef boost::signals2::signal<void(S32 removed_index)> history_signal_t;
LLTeleportHistoryStorage();
~LLTeleportHistoryStorage();
/**
* @return history items.
*/
const slurl_list_t& getItems() const { return mItems; }
void purgeItems();
void addItem(const std::string title, const LLVector3d& global_pos);
void addItem(const std::string title, const LLVector3d& global_pos, const LLDate& date);
void removeItem(S32 idx);
void save();
void load();
void dump() const;
/**
* Set a callback to be called upon history changes.
*
* Multiple callbacks can be set.
*/
boost::signals2::connection setHistoryChangedCallback(history_callback_t cb);
/**
* Go to specific item in the history.
*
* The item is specified by its index (starting from 0).
*/
void goToItem(S32 idx);
private:
void onTeleportHistoryChange();
bool compareByTitleAndGlobalPos(const LLTeleportHistoryPersistentItem& a, const LLTeleportHistoryPersistentItem& b);
slurl_list_t mItems;
std::string mFilename;
/**
* Signal emitted when the history gets changed.
*
* Invokes callbacks set with setHistoryChangedCallback().
*/
history_signal_t mHistoryChangedSignal;
};
#endif //LL_LLTELEPORTHISTORYSTORAGE_H
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