1 | /*********************************************************************** |
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2 | filename: CEGUILua.cpp |
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3 | created: 16/3/2005 |
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4 | author: Tomas Lindquist Olsen |
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5 | |
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6 | purpose: Implementation for LuaScriptModule class |
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7 | *************************************************************************/ |
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8 | /*************************************************************************** |
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9 | * Copyright (C) 2004 - 2008 Paul D Turner & The CEGUI Development Team |
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10 | * |
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11 | * Permission is hereby granted, free of charge, to any person obtaining |
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12 | * a copy of this software and associated documentation files (the |
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13 | * "Software"), to deal in the Software without restriction, including |
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14 | * without limitation the rights to use, copy, modify, merge, publish, |
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15 | * distribute, sublicense, and/or sell copies of the Software, and to |
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16 | * permit persons to whom the Software is furnished to do so, subject to |
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17 | * the following conditions: |
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18 | * |
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19 | * The above copyright notice and this permission notice shall be |
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20 | * included in all copies or substantial portions of the Software. |
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21 | * |
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22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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23 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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24 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
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25 | * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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26 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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27 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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28 | * OTHER DEALINGS IN THE SOFTWARE. |
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29 | ***************************************************************************/ |
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30 | #include "CEGUI.h" |
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31 | #include "CEGUIConfig.h" |
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32 | #include "CEGUIPropertyHelper.h" |
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33 | #include "CEGUILua.h" |
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34 | #include "CEGUILuaFunctor.h" |
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35 | #include <vector> |
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36 | |
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37 | // include Lua libs and tolua++ |
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38 | extern "C" { |
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39 | #include "lua.h" |
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40 | #include "lualib.h" |
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41 | #include "lauxlib.h" |
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42 | } |
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43 | |
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44 | #include "tolua/tolua++.h" |
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45 | |
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46 | // prototype for bindings initialisation function |
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47 | int tolua_CEGUI_open(lua_State* tolua_S); |
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48 | |
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49 | |
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50 | // Start of CEGUI namespace section |
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51 | namespace CEGUI |
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52 | { |
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53 | |
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54 | /************************************************************************* |
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55 | Constructor (creates Lua state) |
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56 | *************************************************************************/ |
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57 | LuaScriptModule::LuaScriptModule() : |
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58 | d_errFuncIndex(LUA_NOREF), |
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59 | d_activeErrFuncIndex(LUA_NOREF) |
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60 | { |
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61 | #if LUA_VERSION_NUM >= 501 |
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62 | static const luaL_Reg lualibs[] = { |
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63 | {"", luaopen_base}, |
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64 | {LUA_LOADLIBNAME, luaopen_package}, |
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65 | {LUA_TABLIBNAME, luaopen_table}, |
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66 | {LUA_IOLIBNAME, luaopen_io}, |
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67 | {LUA_OSLIBNAME, luaopen_os}, |
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68 | {LUA_STRLIBNAME, luaopen_string}, |
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69 | {LUA_MATHLIBNAME, luaopen_math}, |
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70 | #if defined(DEBUG) || defined (_DEBUG) |
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71 | {LUA_DBLIBNAME, luaopen_debug}, |
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72 | #endif |
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73 | {0, 0} |
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74 | }; |
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75 | #endif /* LUA_VERSION_NUM >= 501 */ |
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76 | |
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77 | // create a lua state |
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78 | d_ownsState = true; |
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79 | d_state = lua_open(); |
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80 | |
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81 | // init all standard libraries |
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82 | #if LUA_VERSION_NUM >= 501 |
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83 | const luaL_Reg *lib = lualibs; |
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84 | for (; lib->func; lib++) |
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85 | { |
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86 | lua_pushcfunction(d_state, lib->func); |
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87 | lua_pushstring(d_state, lib->name); |
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88 | lua_call(d_state, 1, 0); |
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89 | } |
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90 | #else /* LUA_VERSION_NUM >= 501 */ |
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91 | luaopen_base(d_state); |
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92 | luaopen_io(d_state); |
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93 | luaopen_string(d_state); |
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94 | luaopen_table(d_state); |
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95 | luaopen_math(d_state); |
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96 | #if defined(DEBUG) || defined (_DEBUG) |
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97 | luaopen_debug(d_state); |
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98 | #endif |
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99 | #endif /* LUA_VERSION_NUM >= 501 */ |
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100 | |
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101 | setModuleIdentifierString(); |
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102 | } |
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103 | |
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104 | |
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105 | /************************************************************************* |
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106 | Constructor (uses given Lua state) |
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107 | *************************************************************************/ |
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108 | LuaScriptModule::LuaScriptModule(lua_State* state) : |
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109 | d_errFuncIndex(LUA_NOREF), |
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110 | d_activeErrFuncIndex(LUA_NOREF) |
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111 | { |
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112 | // just use the given state |
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113 | d_ownsState = false; |
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114 | d_state = state; |
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115 | |
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116 | setModuleIdentifierString(); |
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117 | } |
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118 | |
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119 | |
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120 | /************************************************************************* |
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121 | Destructor |
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122 | *************************************************************************/ |
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123 | LuaScriptModule::~LuaScriptModule() |
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124 | { |
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125 | if (d_state) |
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126 | { |
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127 | unrefErrorFunc(); |
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128 | |
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129 | if (d_ownsState) |
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130 | lua_close( d_state ); |
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131 | } |
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132 | } |
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133 | |
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134 | |
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135 | /************************************************************************* |
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136 | Execute script file |
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137 | *************************************************************************/ |
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138 | void LuaScriptModule::executeScriptFile(const String& filename, |
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139 | const String& resourceGroup) |
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140 | { |
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141 | int top = lua_gettop(d_state); |
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142 | |
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143 | executeScriptFile_impl(filename, resourceGroup, |
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144 | initErrorHandlerFunc(), |
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145 | top); |
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146 | |
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147 | cleanupErrorHandlerFunc(); |
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148 | } |
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149 | |
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150 | |
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151 | /************************************************************************* |
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152 | Execute global script function |
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153 | *************************************************************************/ |
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154 | int LuaScriptModule::executeScriptGlobal(const String& function_name) |
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155 | { |
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156 | int top = lua_gettop(d_state); |
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157 | int r = executeScriptGlobal_impl(function_name, initErrorHandlerFunc(), top); |
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158 | cleanupErrorHandlerFunc(); |
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159 | |
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160 | return r; |
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161 | } |
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162 | |
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163 | |
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164 | /************************************************************************* |
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165 | Execute scripted event handler |
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166 | *************************************************************************/ |
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167 | bool LuaScriptModule::executeScriptedEventHandler(const String& handler_name, |
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168 | const EventArgs& e) |
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169 | { |
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170 | int top = lua_gettop(d_state); |
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171 | bool r = executeScriptedEventHandler_impl(handler_name, e, |
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172 | initErrorHandlerFunc(), top); |
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173 | cleanupErrorHandlerFunc(); |
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174 | |
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175 | return r; |
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176 | } |
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177 | |
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178 | |
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179 | /************************************************************************* |
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180 | Execute script code string |
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181 | *************************************************************************/ |
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182 | void LuaScriptModule::executeString(const String& str) |
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183 | { |
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184 | int top = lua_gettop(d_state); |
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185 | |
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186 | executeString_impl(str, initErrorHandlerFunc(), top); |
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187 | cleanupErrorHandlerFunc(); |
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188 | } |
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189 | |
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190 | |
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191 | /************************************************************************* |
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192 | Create Lua bindings |
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193 | *************************************************************************/ |
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194 | void LuaScriptModule::createBindings(void) |
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195 | { |
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196 | CEGUI::Logger::getSingleton().logEvent( "---- Creating Lua bindings ----" ); |
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197 | // init CEGUI module |
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198 | tolua_CEGUI_open(d_state); |
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199 | } |
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200 | |
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201 | |
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202 | /************************************************************************* |
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203 | Destroy Lua bindings |
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204 | *************************************************************************/ |
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205 | void LuaScriptModule::destroyBindings(void) |
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206 | { |
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207 | CEGUI::Logger::getSingleton().logEvent( "---- Destroying Lua bindings ----" ); |
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208 | // is this ok ? |
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209 | lua_pushnil(d_state); |
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210 | lua_setglobal(d_state,"CEGUI"); |
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211 | } |
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212 | |
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213 | |
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214 | /************************************************************************* |
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215 | Set the ID string for the module |
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216 | *************************************************************************/ |
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217 | void LuaScriptModule::setModuleIdentifierString() |
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218 | { |
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219 | // set ID string |
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220 | d_identifierString = "CEGUI::LuaScriptModule - Official Lua based scripting module for CEGUI"; |
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221 | d_language = "Lua"; |
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222 | } |
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223 | |
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224 | |
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225 | /************************************************************************* |
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226 | Subscribe to a scripted event handler |
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227 | *************************************************************************/ |
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228 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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229 | const String& event_name, const String& subscriber_name) |
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230 | { |
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231 | const String& err_str = getActivePCallErrorHandlerString(); |
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232 | const int err_ref = getActivePCallErrorHandlerReference(); |
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233 | |
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234 | // do the real subscription |
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235 | LuaFunctor functor((err_ref == LUA_NOREF) ? |
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236 | LuaFunctor(d_state, subscriber_name, LUA_NOREF, err_str) : |
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237 | LuaFunctor(d_state, subscriber_name, LUA_NOREF, err_ref)); |
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238 | Event::Connection con = |
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239 | target->subscribeEvent(event_name, Event::Subscriber(functor)); |
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240 | |
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241 | // make sure we don't release the reference we just made when 'functor' is |
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242 | // destroyed as it goes out of scope. |
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243 | functor.index = LUA_NOREF; |
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244 | functor.d_errFuncIndex = LUA_NOREF; |
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245 | |
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246 | // return the event connection |
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247 | return con; |
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248 | } |
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249 | |
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250 | |
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251 | /************************************************************************* |
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252 | Subscribe to a scripted event handler |
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253 | *************************************************************************/ |
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254 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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255 | const String& event_name, Event::Group group, const String& subscriber_name) |
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256 | { |
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257 | const String& err_str = getActivePCallErrorHandlerString(); |
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258 | const int err_ref = getActivePCallErrorHandlerReference(); |
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259 | |
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260 | // do the real subscription |
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261 | LuaFunctor functor((err_ref == LUA_NOREF) ? |
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262 | LuaFunctor(d_state, subscriber_name, LUA_NOREF, err_str) : |
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263 | LuaFunctor(d_state, subscriber_name, LUA_NOREF, err_ref)); |
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264 | Event::Connection con = |
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265 | target->subscribeEvent(event_name, group, Event::Subscriber(functor)); |
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266 | |
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267 | // make sure we don't release the reference we just made when 'functor' is |
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268 | // destroyed as it goes out of scope. |
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269 | functor.index = LUA_NOREF; |
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270 | functor.d_errFuncIndex = LUA_NOREF; |
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271 | |
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272 | // return the event connection |
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273 | return con; |
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274 | } |
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275 | |
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276 | //----------------------------------------------------------------------------// |
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277 | void LuaScriptModule::setDefaultPCallErrorHandler( |
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278 | const String& error_handler_function) |
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279 | { |
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280 | unrefErrorFunc(); |
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281 | |
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282 | d_errFuncName = error_handler_function; |
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283 | d_errFuncIndex = LUA_NOREF; |
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284 | } |
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285 | |
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286 | //----------------------------------------------------------------------------// |
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287 | void LuaScriptModule::setDefaultPCallErrorHandler(int function_reference) |
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288 | { |
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289 | unrefErrorFunc(); |
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290 | |
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291 | d_errFuncIndex = function_reference; |
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292 | d_errFuncName.clear(); |
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293 | } |
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294 | |
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295 | //----------------------------------------------------------------------------// |
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296 | const String& LuaScriptModule::getActivePCallErrorHandlerString() const |
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297 | { |
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298 | if ((d_activeErrFuncIndex == LUA_NOREF) && d_activeErrFuncName.empty()) |
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299 | return d_errFuncName; |
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300 | else |
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301 | return d_activeErrFuncName; |
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302 | } |
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303 | |
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304 | //----------------------------------------------------------------------------// |
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305 | int LuaScriptModule::getActivePCallErrorHandlerReference() const |
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306 | { |
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307 | if ((d_activeErrFuncIndex == LUA_NOREF) && d_activeErrFuncName.empty()) |
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308 | return d_errFuncIndex; |
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309 | else |
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310 | return d_activeErrFuncIndex; |
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311 | } |
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312 | |
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313 | //----------------------------------------------------------------------------// |
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314 | int LuaScriptModule::initErrorHandlerFunc() |
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315 | { |
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316 | d_activeErrFuncName = d_errFuncName; |
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317 | |
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318 | // should we create a registry reference for named function |
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319 | if ((d_errFuncIndex == LUA_NOREF) && !d_errFuncName.empty()) |
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320 | { |
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321 | int top = lua_gettop(d_state); |
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322 | |
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323 | LuaFunctor::pushNamedFunction(d_state, d_errFuncName); |
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324 | // reference function |
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325 | d_errFuncIndex = luaL_ref(d_state, LUA_REGISTRYINDEX); |
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326 | |
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327 | lua_settop(d_state, top); |
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328 | } |
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329 | |
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330 | // init handler via function index in registry |
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331 | return initErrorHandlerFunc(d_errFuncIndex); |
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332 | } |
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333 | |
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334 | //----------------------------------------------------------------------------// |
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335 | int LuaScriptModule::initErrorHandlerFunc(const String func_name) |
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336 | { |
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337 | d_activeErrFuncName = func_name; |
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338 | |
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339 | // string has some text in it? |
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340 | if (!func_name.empty()) |
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341 | { |
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342 | LuaFunctor::pushNamedFunction(d_state, func_name); |
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343 | return lua_gettop(d_state); |
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344 | } |
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345 | |
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346 | // use no error handler function. |
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347 | return 0; |
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348 | } |
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349 | |
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350 | //----------------------------------------------------------------------------// |
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351 | int LuaScriptModule::initErrorHandlerFunc(int func) |
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352 | { |
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353 | d_activeErrFuncIndex = func; |
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354 | |
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355 | // check if we have a valid registry index for the error handler function |
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356 | if (func != LUA_NOREF) |
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357 | { |
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358 | lua_rawgeti(d_state, LUA_REGISTRYINDEX, func); |
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359 | return lua_gettop(d_state); |
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360 | } |
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361 | |
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362 | // use no error handler function. |
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363 | return 0; |
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364 | } |
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365 | |
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366 | //----------------------------------------------------------------------------// |
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367 | void LuaScriptModule::cleanupErrorHandlerFunc() |
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368 | { |
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369 | d_activeErrFuncIndex = LUA_NOREF; |
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370 | d_activeErrFuncName.clear(); |
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371 | } |
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372 | |
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373 | //----------------------------------------------------------------------------// |
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374 | void LuaScriptModule::unrefErrorFunc() |
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375 | { |
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376 | if ((d_errFuncIndex != LUA_NOREF) && !d_errFuncName.empty()) |
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377 | { |
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378 | luaL_unref(d_state, LUA_REGISTRYINDEX, d_errFuncIndex); |
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379 | d_errFuncIndex = LUA_NOREF; |
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380 | } |
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381 | } |
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382 | |
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383 | //----------------------------------------------------------------------------// |
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384 | void LuaScriptModule::executeScriptFile(const String& filename, |
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385 | const String& resourceGroup, const String& error_handler) |
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386 | { |
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387 | int top = lua_gettop(d_state); |
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388 | |
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389 | executeScriptFile_impl(filename, resourceGroup, |
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390 | initErrorHandlerFunc(error_handler), |
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391 | top); |
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392 | cleanupErrorHandlerFunc(); |
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393 | } |
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394 | |
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395 | //----------------------------------------------------------------------------// |
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396 | void LuaScriptModule::executeScriptFile(const String& filename, |
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397 | const String& resourceGroup, const int error_handler) |
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398 | { |
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399 | int top = lua_gettop(d_state); |
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400 | |
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401 | executeScriptFile_impl(filename, resourceGroup, |
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402 | initErrorHandlerFunc(error_handler), |
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403 | top); |
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404 | cleanupErrorHandlerFunc(); |
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405 | } |
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406 | |
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407 | //----------------------------------------------------------------------------// |
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408 | int LuaScriptModule::executeScriptGlobal(const String& function_name, |
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409 | const String& error_handler) |
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410 | { |
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411 | int top = lua_gettop(d_state); |
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412 | int r = executeScriptGlobal_impl(function_name, |
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413 | initErrorHandlerFunc(error_handler), |
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414 | top); |
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415 | cleanupErrorHandlerFunc(); |
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416 | |
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417 | return r; |
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418 | } |
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419 | |
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420 | //----------------------------------------------------------------------------// |
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421 | int LuaScriptModule::executeScriptGlobal(const String& function_name, |
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422 | const int error_handler) |
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423 | { |
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424 | int top = lua_gettop(d_state); |
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425 | int r = executeScriptGlobal_impl(function_name, |
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426 | initErrorHandlerFunc(error_handler), |
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427 | top); |
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428 | cleanupErrorHandlerFunc(); |
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429 | |
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430 | return r; |
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431 | } |
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432 | |
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433 | //----------------------------------------------------------------------------// |
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434 | bool LuaScriptModule::executeScriptedEventHandler(const String& handler_name, |
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435 | const EventArgs& e, const String& error_handler) |
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436 | { |
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437 | int top = lua_gettop(d_state); |
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438 | |
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439 | bool r =executeScriptedEventHandler_impl(handler_name, e, |
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440 | initErrorHandlerFunc(error_handler), |
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441 | top); |
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442 | cleanupErrorHandlerFunc(); |
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443 | |
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444 | return r; |
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445 | } |
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446 | |
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447 | //----------------------------------------------------------------------------// |
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448 | bool LuaScriptModule::executeScriptedEventHandler(const String& handler_name, |
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449 | const EventArgs& e, const int error_handler) |
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450 | { |
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451 | int top = lua_gettop(d_state); |
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452 | bool r = executeScriptedEventHandler_impl(handler_name, e, |
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453 | initErrorHandlerFunc(error_handler), |
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454 | top); |
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455 | cleanupErrorHandlerFunc(); |
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456 | |
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457 | return r; |
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458 | } |
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459 | |
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460 | //----------------------------------------------------------------------------// |
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461 | void LuaScriptModule::executeString(const String& str, |
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462 | const String& error_handler) |
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463 | { |
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464 | int top = lua_gettop(d_state); |
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465 | |
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466 | executeString_impl(str, initErrorHandlerFunc(error_handler), top); |
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467 | cleanupErrorHandlerFunc(); |
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468 | } |
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469 | |
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470 | //----------------------------------------------------------------------------// |
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471 | void LuaScriptModule::executeString(const String& str, const int error_handler) |
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472 | { |
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473 | int top = lua_gettop(d_state); |
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474 | |
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475 | executeString_impl(str, initErrorHandlerFunc(error_handler), top); |
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476 | cleanupErrorHandlerFunc(); |
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477 | } |
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478 | |
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479 | //----------------------------------------------------------------------------// |
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480 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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481 | const String& event_name, const String& subscriber_name, |
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482 | const String& error_handler) |
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483 | { |
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484 | // do the real subscription |
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485 | LuaFunctor functor(d_state, subscriber_name, LUA_NOREF, error_handler); |
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486 | Event::Connection con = |
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487 | target->subscribeEvent(event_name, Event::Subscriber(functor)); |
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488 | |
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489 | // make sure we don't release the references we just made when 'functor' is |
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490 | // destroyed as it goes out of scope. |
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491 | functor.index = LUA_NOREF; |
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492 | functor.d_errFuncIndex = LUA_NOREF; |
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493 | |
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494 | // return the event connection |
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495 | return con; |
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496 | } |
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497 | |
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498 | //----------------------------------------------------------------------------// |
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499 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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500 | const String& event_name, const String& subscriber_name, |
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501 | const int error_handler) |
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502 | { |
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503 | // do the real subscription |
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504 | LuaFunctor functor(d_state, subscriber_name, LUA_NOREF, error_handler); |
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505 | Event::Connection con = |
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506 | target->subscribeEvent(event_name, Event::Subscriber(functor)); |
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507 | |
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508 | // make sure we don't release the references we just made when 'functor' is |
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509 | // destroyed as it goes out of scope. |
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510 | functor.index = LUA_NOREF; |
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511 | functor.d_errFuncIndex = LUA_NOREF; |
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512 | |
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513 | // return the event connection |
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514 | return con; |
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515 | } |
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516 | |
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517 | |
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518 | //----------------------------------------------------------------------------// |
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519 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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520 | const String& event_name, Event::Group group, const String& subscriber_name, |
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521 | const String& error_handler) |
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522 | { |
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523 | // do the real subscription |
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524 | LuaFunctor functor(d_state, subscriber_name, LUA_NOREF, error_handler); |
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525 | Event::Connection con = |
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526 | target->subscribeEvent(event_name, group, Event::Subscriber(functor)); |
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527 | |
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528 | // make sure we don't release the references we just made when 'functor' is |
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529 | // destroyed as it goes out of scope. |
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530 | functor.index = LUA_NOREF; |
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531 | functor.d_errFuncIndex = LUA_NOREF; |
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532 | |
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533 | // return the event connection |
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534 | return con; |
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535 | } |
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536 | |
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537 | //----------------------------------------------------------------------------// |
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538 | Event::Connection LuaScriptModule::subscribeEvent(EventSet* target, |
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539 | const String& event_name, Event::Group group, const String& subscriber_name, |
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540 | const int error_handler) |
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541 | { |
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542 | // do the real subscription |
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543 | LuaFunctor functor(d_state, subscriber_name, LUA_NOREF, error_handler); |
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544 | Event::Connection con = |
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545 | target->subscribeEvent(event_name, group, Event::Subscriber(functor)); |
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546 | |
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547 | // make sure we don't release the references we just made when 'functor' is |
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548 | // destroyed as it goes out of scope. |
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549 | functor.index = LUA_NOREF; |
---|
550 | functor.d_errFuncIndex = LUA_NOREF; |
---|
551 | |
---|
552 | // return the event connection |
---|
553 | return con; |
---|
554 | } |
---|
555 | |
---|
556 | //----------------------------------------------------------------------------// |
---|
557 | void LuaScriptModule::executeScriptFile_impl(const String& filename, |
---|
558 | const String& resourceGroup, const int err_idx, const int top) |
---|
559 | { |
---|
560 | // load file |
---|
561 | RawDataContainer raw; |
---|
562 | System::getSingleton().getResourceProvider()->loadRawDataContainer(filename, |
---|
563 | raw, resourceGroup.empty() ? d_defaultResourceGroup : resourceGroup); |
---|
564 | |
---|
565 | // load code into lua |
---|
566 | int loaderr = luaL_loadbuffer(d_state, |
---|
567 | reinterpret_cast<char*>(raw.getDataPtr()), |
---|
568 | raw.getSize(), filename.c_str()); |
---|
569 | |
---|
570 | System::getSingleton().getResourceProvider()->unloadRawDataContainer( raw ); |
---|
571 | |
---|
572 | if (loaderr) |
---|
573 | { |
---|
574 | String errMsg = lua_tostring(d_state,-1); |
---|
575 | lua_settop(d_state,top); |
---|
576 | throw ScriptException("Unable to execute Lua script file: '" + |
---|
577 | filename + "'\n\n" + errMsg + "\n"); |
---|
578 | } |
---|
579 | |
---|
580 | // call it |
---|
581 | if (lua_pcall(d_state, 0, 0, err_idx)) |
---|
582 | { |
---|
583 | String errMsg = lua_tostring(d_state,-1); |
---|
584 | lua_settop(d_state,top); |
---|
585 | throw ScriptException("Unable to execute Lua script file: '" + |
---|
586 | filename + "'\n\n" + errMsg + "\n"); |
---|
587 | } |
---|
588 | |
---|
589 | lua_settop(d_state,top); // just in case :P |
---|
590 | } |
---|
591 | |
---|
592 | //----------------------------------------------------------------------------// |
---|
593 | int LuaScriptModule::executeScriptGlobal_impl(const String& function_name, |
---|
594 | const int err_idx, const int top) |
---|
595 | { |
---|
596 | // get the function from lua |
---|
597 | lua_getglobal(d_state, function_name.c_str()); |
---|
598 | |
---|
599 | // is it a function |
---|
600 | if (!lua_isfunction(d_state,-1)) |
---|
601 | { |
---|
602 | lua_settop(d_state,top); |
---|
603 | throw ScriptException("Unable to get Lua global: '" + function_name + |
---|
604 | "' as name not represent a global Lua function" ); |
---|
605 | } |
---|
606 | |
---|
607 | // call it |
---|
608 | int error = lua_pcall(d_state, 0, 1, err_idx); |
---|
609 | |
---|
610 | // handle errors |
---|
611 | if (error) |
---|
612 | { |
---|
613 | String errMsg = lua_tostring(d_state,-1); |
---|
614 | lua_settop(d_state,top); |
---|
615 | throw ScriptException("Unable to evaluate Lua global: '" + |
---|
616 | function_name + "\n\n" + errMsg + "\n"); |
---|
617 | } |
---|
618 | |
---|
619 | // get return value |
---|
620 | if (!lua_isnumber(d_state,-1)) |
---|
621 | { |
---|
622 | // log that return value is invalid. return -1 and move on. |
---|
623 | lua_settop(d_state,top); |
---|
624 | ScriptException("Unable to get Lua global : '" + function_name + |
---|
625 | "' return value as it's not a number"); |
---|
626 | return -1; |
---|
627 | } |
---|
628 | |
---|
629 | int ret = static_cast<int>(lua_tonumber(d_state,-1)); |
---|
630 | lua_settop(d_state,top); |
---|
631 | |
---|
632 | // return it |
---|
633 | return ret; |
---|
634 | } |
---|
635 | |
---|
636 | //----------------------------------------------------------------------------// |
---|
637 | bool LuaScriptModule::executeScriptedEventHandler_impl( |
---|
638 | const String& handler_name, const EventArgs& e, const int err_idx, |
---|
639 | const int top) |
---|
640 | { |
---|
641 | LuaFunctor::pushNamedFunction(d_state, handler_name); |
---|
642 | |
---|
643 | ScriptWindowHelper* helper = 0; |
---|
644 | // If this is an event that was triggered by a window then make a "this" |
---|
645 | // pointer to the window for the script. |
---|
646 | if(e.d_hasWindow) |
---|
647 | { |
---|
648 | WindowEventArgs& we = (WindowEventArgs&)e; |
---|
649 | helper = new ScriptWindowHelper(we.window); |
---|
650 | lua_pushlightuserdata(d_state,(void*)helper); |
---|
651 | lua_setglobal(d_state,"this"); |
---|
652 | } |
---|
653 | |
---|
654 | // push EventArgs as the first parameter |
---|
655 | tolua_pushusertype(d_state, (void*)&e, "const CEGUI::EventArgs"); |
---|
656 | |
---|
657 | // call it |
---|
658 | int error = lua_pcall(d_state, 1, 1, err_idx); |
---|
659 | |
---|
660 | // handle errors |
---|
661 | if (error) |
---|
662 | { |
---|
663 | String errStr(lua_tostring(d_state,-1)); |
---|
664 | lua_settop(d_state,top); |
---|
665 | //cleanup the helper object if any |
---|
666 | if(helper) |
---|
667 | { |
---|
668 | delete helper; |
---|
669 | helper = 0; |
---|
670 | } |
---|
671 | |
---|
672 | throw ScriptException("Unable to evaluate the Lua event handler: '" + |
---|
673 | handler_name + "'\n\n" + errStr + "\n"); |
---|
674 | } |
---|
675 | |
---|
676 | // retrieve result |
---|
677 | bool ret = lua_isboolean(d_state, -1) ? lua_toboolean(d_state, -1 ) : true; |
---|
678 | lua_settop(d_state,top); |
---|
679 | |
---|
680 | if(helper) |
---|
681 | { |
---|
682 | delete helper; |
---|
683 | helper = 0; |
---|
684 | } |
---|
685 | |
---|
686 | return ret; |
---|
687 | } |
---|
688 | |
---|
689 | //----------------------------------------------------------------------------// |
---|
690 | void LuaScriptModule::executeString_impl(const String& str, const int err_idx, |
---|
691 | const int top) |
---|
692 | { |
---|
693 | // load code into lua and call it |
---|
694 | int error = luaL_loadbuffer(d_state, str.c_str(), str.length(), str.c_str()) || |
---|
695 | lua_pcall(d_state, 0, 0, err_idx); |
---|
696 | |
---|
697 | // handle errors |
---|
698 | if (error) |
---|
699 | { |
---|
700 | String errMsg = lua_tostring(d_state,-1); |
---|
701 | lua_settop(d_state,top); |
---|
702 | throw ScriptException("Unable to execute Lua script string: '" + |
---|
703 | str + "'\n\n" + errMsg + "\n"); |
---|
704 | } |
---|
705 | |
---|
706 | lua_settop(d_state,top); |
---|
707 | } |
---|
708 | |
---|
709 | //----------------------------------------------------------------------------// |
---|
710 | |
---|
711 | |
---|
712 | } // namespace CEGUI |
---|