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/**
* @file lllandmark.h
* @brief Landmark asset class
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* 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_LLLANDMARK_H
#define LL_LLLANDMARK_H
#include <map>
#include <boost/function.hpp>
#include "llframetimer.h"
#include "lluuid.h"
#include "v3dmath.h"
class LLMessageSystem;
class LLHost;
class LLLandmark
{
public:
// for calling back interested parties when a region handle comes back.
typedef boost::function<void(const LLUUID& region_id, const U64& region_handle)> region_handle_callback_t;
~LLLandmark() {}
// returns true if the position is known.
bool getGlobalPos(LLVector3d& pos);
// setter used in conjunction if more information needs to be
// collected from the server.
void setGlobalPos(const LLVector3d& pos);
// return true if the region is known
bool getRegionID(LLUUID& region_id);
// return the local coordinates if known
LLVector3 getRegionPos() const;
// constructs a new LLLandmark from a string
// return NULL if there's an error
static LLLandmark* constructFromString(const char *buffer);
// register callbacks that this class handles
static void registerCallbacks(LLMessageSystem* msg);
// request information about region_id to region_handle.Pass in a
// callback pointer which will be erase but NOT deleted after the
// callback is made. This function may call into the message
// system to get the information.
static void requestRegionHandle(
LLMessageSystem* msg,
const LLHost& upstream_host,
const LLUUID& region_id,
region_handle_callback_t callback);
// Call this method to create a lookup for this region. This
// simplifies a lot of the code.
static void setRegionHandle(const LLUUID& region_id, U64 region_handle);
private:
LLLandmark();
LLLandmark(const LLVector3d& pos);
static void processRegionIDAndHandle(LLMessageSystem* msg, void**);
static void expireOldEntries();
private:
LLUUID mRegionID;
LLVector3 mRegionPos;
bool mGlobalPositionKnown;
LLVector3d mGlobalPos;
struct CacheInfo
{
U64 mRegionHandle;
LLFrameTimer mTimer;
};
static std::pair<LLUUID, U64> mLocalRegion;
typedef std::map<LLUUID, CacheInfo> region_map_t;
static region_map_t mRegions;
typedef std::multimap<LLUUID, region_handle_callback_t> region_callback_map_t;
static region_callback_map_t sRegionCallbackMap;
};
#endif
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