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/***********************************************************************
filename: CEGUILuaFunctor.h
created: Thu Jan 26 2006
author: Tomas Lindquist Olsen <tomas@famolsen.dk>
purpose: Defines interface for LuaFunctor class
*************************************************************************/
/***************************************************************************
* Copyright (C) 2004 - 2008 Paul D Turner & The CEGUI Development Team
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
***************************************************************************/
#ifndef _CEGUILuaFunctor_h_
#define _CEGUILuaFunctor_h_
#include "../../CEGUIEventSet.h"
struct lua_State;
// Start of CEGUI namespace section
namespace CEGUI
{
// forward declaration
class LuaScriptModule;
/*!
\brief
Functor class used for subscribing Lua functions to CEGUI events
*/
class LuaFunctor
{
public:
LuaFunctor(lua_State* state, int func, int selfIndex);
LuaFunctor(lua_State* state, const String& func, int selfIndex);
LuaFunctor(lua_State* state, const int func, const int selfIndex,
const String& error_handler);
LuaFunctor(lua_State* state, const String& func, const int selfIndex,
const String& error_handler);
LuaFunctor(lua_State* state, const int func, const int selfIndex,
const int error_handler);
LuaFunctor(lua_State* state, const String& func, const int selfIndex,
const int error_handler);
LuaFunctor(const LuaFunctor& cp);
~LuaFunctor();
bool operator()(const EventArgs& args) const;
/*!
\brief
function used to subscribe any Lua function as event handler.
References using the Lua registry.
To be called from Lua only.
*/
static Event::Connection SubscribeEvent(EventSet* self,
const String& eventName,
const int funcIndex,
const int selfIndex,
const int error_handler,
lua_State* L);
/*!
\brief
Pushes the Lua function named \param name on top of the Lua stack.
The name may contain '.' (dots) character for (nested) table values.
*/
static void pushNamedFunction(lua_State* L, const String& name);
private:
/*!
\brief
Invalidate the registry references. This is used internally to ensure
that the references do not get released (for example when we destroy
a temporary object)
*/
void invalidateLuaRefs();
lua_State* L;
mutable int index;
int self;
mutable bool needs_lookup;
mutable String function_name;
//! Error handler function to pass to lua_pcall.
mutable String d_errFuncName;
//! registry index of the function to pass to lua_pcall.
mutable int d_errFuncIndex;
//! signfies whether we made the reference index at d_errFuncIndex.
mutable bool d_ourErrFuncIndex;
friend class LuaScriptModule;
};
} // namespace CEGUI
#endif // end of guard _CEGUILuaFunctor_h_
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