src/script/squirrel_class.hpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
   6  * OpenTTD 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.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file squirrel_class.hpp Defines templates for converting C++ classes to Squirrel classes */
  11
  12 #ifndef SQUIRREL_CLASS_HPP
  13 #define SQUIRREL_CLASS_HPP
  14
  15 #include "squirrel_helper.hpp"
  16
  17 /**
  18  * The template to define classes in Squirrel. It takes care of the creation
  19  *  and calling of such classes, to minimize the API layer.
  20  */
  21 template <class CL, ScriptType ST>
  22 class DefSQClass {
  23 private:
  24         const char *classname;
  25
  26 public:
  27         DefSQClass(const char *_classname) :
  28                 classname(_classname)
  29         {}
  30
  31         /**
  32          * This defines a method inside a class for Squirrel.
  33          */
  34         template <typename Func>
  35         void DefSQMethod(Squirrel *engine, Func function_proc, const char *function_name)
  36         {
  37                 using namespace SQConvert;
  38                 engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func, ST>, 0, NULL, &function_proc, sizeof(function_proc));
  39         }
  40
  41         /**
  42          * This defines a method inside a class for Squirrel, which has access to the 'engine' (experts only!).
  43          */
  44         template <typename Func>
  45         void DefSQAdvancedMethod(Squirrel *engine, Func function_proc, const char *function_name)
  46         {
  47                 using namespace SQConvert;
  48                 engine->AddMethod(function_name, DefSQAdvancedNonStaticCallback<CL, Func, ST>, 0, NULL, &function_proc, sizeof(function_proc));
  49         }
  50
  51         /**
  52          * This defines a method inside a class for Squirrel with defined params.
  53          * @note If you define nparam, make sure that he first param is always 'x',
  54          *  which is the 'this' inside the function. This is hidden from the rest
  55          *  of the code, but without it calling your function will fail!
  56          */
  57         template <typename Func>
  58         void DefSQMethod(Squirrel *engine, Func function_proc, const char *function_name, int nparam, const char *params)
  59         {
  60                 using namespace SQConvert;
  61                 engine->AddMethod(function_name, DefSQNonStaticCallback<CL, Func, ST>, nparam, params, &function_proc, sizeof(function_proc));
  62         }
  63
  64         /**
  65          * This defines a static method inside a class for Squirrel.
  66          */
  67         template <typename Func>
  68         void DefSQStaticMethod(Squirrel *engine, Func function_proc, const char *function_name)
  69         {
  70                 using namespace SQConvert;
  71                 engine->AddMethod(function_name, DefSQStaticCallback<CL, Func>, 0, NULL, &function_proc, sizeof(function_proc));
  72         }
  73
  74         /**
  75          * This defines a static method inside a class for Squirrel, which has access to the 'engine' (experts only!).
  76          */
  77         template <typename Func>
  78         void DefSQAdvancedStaticMethod(Squirrel *engine, Func function_proc, const char *function_name)
  79         {
  80                 using namespace SQConvert;
  81                 engine->AddMethod(function_name, DefSQAdvancedStaticCallback<CL, Func>, 0, NULL, &function_proc, sizeof(function_proc));
  82         }
  83
  84         /**
  85          * This defines a static method inside a class for Squirrel with defined params.
  86          * @note If you define nparam, make sure that he first param is always 'x',
  87          *  which is the 'this' inside the function. This is hidden from the rest
  88          *  of the code, but without it calling your function will fail!
  89          */
  90         template <typename Func>
  91         void DefSQStaticMethod(Squirrel *engine, Func function_proc, const char *function_name, int nparam, const char *params)
  92         {
  93                 using namespace SQConvert;
  94                 engine->AddMethod(function_name, DefSQStaticCallback<CL, Func>, nparam, params, &function_proc, sizeof(function_proc));
  95         }
  96
  97         template <typename Var>
  98         void DefSQConst(Squirrel *engine, Var value, const char *var_name)
  99         {
 100                 engine->AddConst(var_name, value);
 101         }
 102
 103         void PreRegister(Squirrel *engine)
 104         {
 105                 engine->AddClassBegin(this->classname);
 106         }
 107
 108         void PreRegister(Squirrel *engine, const char *parent_class)
 109         {
 110                 engine->AddClassBegin(this->classname, parent_class);
 111         }
 112
 113         template <typename Func, int Tnparam>
 114         void AddConstructor(Squirrel *engine, const char *params)
 115         {
 116                 using namespace SQConvert;
 117                 engine->AddMethod("constructor", DefSQConstructorCallback<CL, Func, Tnparam>, Tnparam, params);
 118         }
 119
 120         void AddSQAdvancedConstructor(Squirrel *engine)
 121         {
 122                 using namespace SQConvert;
 123                 engine->AddMethod("constructor", DefSQAdvancedConstructorCallback<CL>, 0, NULL);
 124         }
 125
 126         void PostRegister(Squirrel *engine)
 127         {
 128                 engine->AddClassEnd();
 129         }
 130 };
 131
 132 #endif /* SQUIRREL_CLASS_HPP */