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126 lines
4.2 KiB
126 lines
4.2 KiB
/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef LUAOBJECT_H
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#define LUAOBJECT_H
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#include "declarations.h"
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/// LuaObject, all script-able classes have it as base
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class LuaObject : public std::enable_shared_from_this<LuaObject>
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{
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public:
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LuaObject();
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virtual ~LuaObject();
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/// Calls a function or table of functions stored in a lua field, results are pushed onto the stack,
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/// if any lua error occurs, it will be reported to stdout and return 0 results
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/// @return the number of results
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template<typename... T>
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int callLuaField(const std::string& field, const T&... args);
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template<typename R, typename... T>
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R callLuaField(const std::string& field, const T&... args);
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/// Sets a field in this lua object
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template<typename T>
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void setLuaField(const std::string& key, const T& value);
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/// Gets a field from this lua object
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template<typename T>
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T getLuaField(const std::string& key);
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/// Release fields table reference
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void releaseLuaFieldsTable();
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/// Sets a field from this lua object, the value must be on the stack
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void luaSetField(const std::string& key);
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/// Gets a field from this lua object, the result is pushed onto the stack
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void luaGetField(const std::string& key);
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/// Gets the table containing all stored fields of this lua object, the result is pushed onto the stack
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void luaGetFieldsTable();
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/// Returns the number of references of this object
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/// @note each userdata of this object on lua counts as a reference
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int getUseCount();
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/// Returns the derived class name, its the same name used in Lua
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virtual std::string getClassName() const {
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// TODO: this could be cached for more performance
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return Fw::demangleName(typeid(*this).name());
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}
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LuaObjectPtr asLuaObject() { return shared_from_this(); }
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private:
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int m_fieldsTableRef;
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};
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#include "luainterface.h"
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template<typename... T>
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int LuaObject::callLuaField(const std::string& field, const T&... args) {
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// note that the field must be retrieved from this object lua value
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// to force using the __index metamethod of it's metatable
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// so cannot use LuaObject::getField here
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// push field
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g_lua.pushObject(asLuaObject());
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g_lua.getField(field);
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if(!g_lua.isNil()) {
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// the first argument is always this object (self)
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g_lua.insert(-2);
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g_lua.polymorphicPush(args...);
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return g_lua.protectedCall(1 + sizeof...(args));
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} else {
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g_lua.pop(2);
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}
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return 0;
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}
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template<typename R, typename... T>
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R LuaObject::callLuaField(const std::string& field, const T&... args) {
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R result;
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int rets = callLuaField(field, args...);
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if(rets > 0) {
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assert(rets == 1);
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result = g_lua.polymorphicPop<R>();
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} else
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result = R();
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return result;
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}
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template<typename T>
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void LuaObject::setLuaField(const std::string& key, const T& value) {
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g_lua.polymorphicPush(value);
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luaSetField(key);
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}
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template<typename T>
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T LuaObject::getLuaField(const std::string& key) {
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luaGetField(key);
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return g_lua.polymorphicPop<T>();
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}
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#endif
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