khanat-opennel-code/code/ryzom/client/src/r2/config_var.h

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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef R2_CONFIG_VAR_H
#define R2_CONFIG_VAR_H
2013-02-14 15:53:06 +00:00
#include "nel/gui/lua_object.h"
#include "editor.h"
namespace R2
{
// base class for he config file variables
class CConfigVarBase
{
public:
CConfigVarBase(const char *varName);
protected:
mutable uint32 _TimeStamp; // If this date is not the same than the config file date, then we know the
// value should be updated (so, more a counter than a timestamp, actually)
std::string _VarName;
private:
// not copyable
CConfigVarBase(const CConfigVarBase &/* other */) { nlassert(0); }
CConfigVarBase &operator = (const CConfigVarBase &/* other */) { nlassert(0); return *this; }
public:
static uint32 &getConfigFileTimeStamp();
};
/** Quick access to variables defined inside r2_config.lua.
*
* Variables are updated when the editor is reseted.
* They are usually created at global scope.
*
* Example :
*
* CConfigVarRGBA CV_CreatureDefaultColor("CreatureDefaultColor", CRGBA(255, 255, 255, 0))); // r2_config.lua may contains a 'CreatureDefaultColor' config value
*
* creature.setColor(CV_CreatureDefaultColor.get());
*
*/
template <class T>
class CConfigVar : public CConfigVarBase
{
public:
CConfigVar(const char *varName, const T &defaultValue = T()) : CConfigVarBase(varName), _Default(defaultValue) {}
CConfigVar(const CConfigVar &other) : CConfigVarBase(other._VarName.c_str()), _Value(other._Value), _Default(other._Default) {}
const T &get() const;
private:
mutable T _Value;
const T _Default;
};
// forward declarations for specialisations
std::string getConfigVarTypename(const float &dummy);
bool getConfigVarValue(CLuaObject &luaValue, float &dest);
std::string getConfigVarTypename(const double &dummy);
bool getConfigVarValue(CLuaObject &luaValue, double &dest);
std::string getConfigVarTypename(const sint32 &dummy);
bool getConfigVarValue(CLuaObject &luaValue, sint32 &dest);
std::string getConfigVarTypename(const std::string &dummy);
bool getConfigVarValue(CLuaObject &luaValue, std::string &dest);
std::string getConfigVarTypename(const NLMISC::CRGBA &dummy);
bool getConfigVarValue(CLuaObject &luaValue, NLMISC::CRGBA &dest);
template <class T> const T &CConfigVar<T>::get() const
{
// Relies on R2 'getConfigVarValue' and 'getConfigVarTypename' functions specialization to retrieve the value (see below)
if (_TimeStamp != CConfigVarBase::getConfigFileTimeStamp())
{
const CLuaObject &config = getEditor().getConfig();
if (config.isNil())
{
nlwarning("Trying to access the config file value '%s' of type '%s' from r2_config.lua, but the file hasn't been parsed yet, or its parsing failed, using default value.", _VarName.c_str(), getConfigVarTypename(_Default).c_str());
_Value = _Default;
}
else
{
CLuaObject luaValue = config[_VarName];
if (!getConfigVarValue(luaValue, _Value))
{
nlwarning("Can't retrieve value of R2 config var '%s', of type '%s', using default value", _VarName.c_str(), getConfigVarTypename(_Default).c_str());
_Value = _Default;
}
}
_TimeStamp = CConfigVarBase::getConfigFileTimeStamp();
}
return _Value;
};
//////////////////////
// Specialisations //
//////////////////////
//------------------------------------------------------------------------------------------------
// Float
inline std::string getConfigVarTypename(const float &/* dummy */) { return "float"; }
inline bool getConfigVarValue(CLuaObject &luaValue, float &dest)
{
if (luaValue.isNumber())
{
dest = (float) luaValue.toNumber();
return true;
}
return false;
}
typedef CConfigVar<float> CConfigVarFloat;
//------------------------------------------------------------------------------------------------
// Double
inline std::string getConfigVarTypename(const double &/* dummy */) { return "float"; }
inline bool getConfigVarValue(CLuaObject &luaValue, double &dest)
{
if (luaValue.isNumber())
{
dest = luaValue.toNumber();
return true;
}
return false;
}
typedef CConfigVar<double> CConfigVarDouble;
//------------------------------------------------------------------------------------------------
// sint32
inline std::string getConfigVarTypename(const sint32 &/* dummy */) { return "sint32"; }
inline bool getConfigVarValue(CLuaObject &luaValue, sint32 &dest)
{
if (luaValue.isNumber())
{
dest = (sint32) luaValue.toNumber();
return true;
}
return false;
}
typedef CConfigVar<sint32> CConfigVarSInt32;
//------------------------------------------------------------------------------------------------
// String
inline std::string getConfigVarTypename(const std::string &/* dummy */) { return "string"; }
inline bool getConfigVarValue(CLuaObject &luaValue, std::string &dest)
{
if (luaValue.isString())
{
dest = luaValue.toString();
return true;
}
return false;
}
typedef CConfigVar<std::string> CConfigVarString;
//------------------------------------------------------------------------------------------------
// RGBA
inline std::string getConfigVarTypename(const NLMISC::CRGBA &/* dummy */) { return "rgba"; }
inline bool getConfigVarValue(CLuaObject &luaValue, NLMISC::CRGBA &dest)
{
if (luaValue.isRGBA())
{
dest = luaValue.toRGBA();
return true;
}
return false;
}
typedef CConfigVar<NLMISC::CRGBA> CConfigVarRGBA;
} // R2
#endif