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see #3706 the main usecase to be able to show messages and dialog labels in the color of a specific team.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| /* | ||
| Copyright (C) 2020-2020 by the Battle for Wesnoth Project https://www.wesnoth.org/ | ||
| This program 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; either version 2 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. | ||
| See the COPYING file for more details. | ||
| */ | ||
|
|
||
| #include "color_range.hpp" | ||
| #include "scripting/lua_color.hpp" | ||
| #include "scripting/lua_common.hpp" | ||
| #include "scripting/push_check.hpp" | ||
| #include "lua/lauxlib.h" | ||
| #include "lua/lua.h" // for lua_State, lua_settop, etc | ||
| #include "log.hpp" | ||
| #include "game_config.hpp" | ||
|
|
||
| static lg::log_domain log_scripting_lua("scripting/lua"); | ||
| #define LOG_LUA LOG_STREAM(info, log_scripting_lua) | ||
| #define ERR_LUA LOG_STREAM(err, log_scripting_lua) | ||
|
|
||
| static const char colorKey[] = "color range"; | ||
|
|
||
| bool luaW_iscolor(lua_State* L, int index) | ||
| { | ||
| return luaL_testudata(L, index, colorKey) != nullptr; | ||
| } | ||
|
|
||
| static color_range& LuaW_checkcolor(lua_State *L, int index) | ||
| { | ||
| if(!luaW_iscolor(L, index)) { | ||
| luaW_type_error(L, index, "color"); | ||
| throw "luaW_type_error returned"; | ||
| } | ||
| return *static_cast<color_range*>(lua_touserdata(L, index)); | ||
| } | ||
|
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||
|
|
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| color_range* luaW_pushcolor(lua_State *L, const color_range& color) | ||
| { | ||
| color_range* res = new(L) color_range(color); | ||
| luaL_setmetatable(L, colorKey); | ||
| return res; | ||
| } | ||
|
|
||
| int luaW_pushsinglecolor(lua_State *L, const color_t& color) | ||
| { | ||
| lua_createtable(L, 0, 4); | ||
| luaW_table_set(L, -1, "r", color.r); | ||
| luaW_table_set(L, -1, "g", color.g); | ||
| luaW_table_set(L, -1, "b", color.b); | ||
| luaW_table_set(L, -1, "a", color.a); | ||
| return 1; | ||
| } | ||
|
|
||
| static int impl_color_collect(lua_State *L) | ||
| { | ||
| color_range *c = static_cast<color_range *>(lua_touserdata(L, 1)); | ||
| c->color_range::~color_range(); | ||
| return 0; | ||
| } | ||
|
|
||
| /** | ||
| * Checks two color units for equality. (__eq metamethod) | ||
| */ | ||
| static int impl_color_equality(lua_State* L) | ||
| { | ||
| color_range& left = LuaW_checkcolor(L, 1); | ||
| color_range& right = LuaW_checkcolor(L, 2); | ||
| const bool equal = left == right; | ||
| lua_pushboolean(L, equal); | ||
| return 1; | ||
| } | ||
|
|
||
| /** | ||
| * Turns a lua color to string. (__tostring metamethod) | ||
| */ | ||
| static int impl_color_tostring(lua_State* L) | ||
| { | ||
| color_range& c = LuaW_checkcolor(L, 1); | ||
| //TODO: is this the best way to call tostring? | ||
| lua_push(L, c.debug()); | ||
| return 1; | ||
| } | ||
|
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||
|
|
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| /** | ||
| * - Arg 1: userdata (ignored). | ||
| * - Arg 2: string containing the name of the color. | ||
| * - Ret 1: color_range containing the color. | ||
| */ | ||
| static int impl_get_color(lua_State *L) | ||
| { | ||
| std::string color_id = luaL_checkstring(L, 2); | ||
| luaW_pushcolor(L, game_config::color_info(color_id)); | ||
| return 1; | ||
| } | ||
|
|
||
| static int impl_color_get(lua_State *L) | ||
| { | ||
| color_range& c = LuaW_checkcolor(L, 1); | ||
| char const *m = luaL_checkstring(L, 2); | ||
|
|
||
| if(strcmp(m, "min") == 0) { | ||
| return luaW_pushsinglecolor(L, c.min()); | ||
| } | ||
| if(strcmp(m, "max") == 0) { | ||
| return luaW_pushsinglecolor(L, c.max()); | ||
| } | ||
| if(strcmp(m, "mid") == 0) { | ||
| return luaW_pushsinglecolor(L, c.mid()); | ||
| } | ||
| if(strcmp(m, "minimap") == 0) { | ||
| return luaW_pushsinglecolor(L, c.rep()); | ||
| } | ||
| // TODO: i think this shortcut would be useful, but im not sure yet on the best attribute name. | ||
| //if(strcmp(m, "pango_hex") == 0) { | ||
| // lua_push(L, c.mid().to_hex_string()); | ||
| // return 1; | ||
| //} | ||
| return 0; | ||
| } | ||
|
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| static int impl_color_set(lua_State *L) | ||
| { | ||
| return luaL_argerror(L, 2, "color objects canot be modified"); | ||
| } | ||
|
|
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| namespace lua_colors { | ||
| std::string register_metatables(lua_State* L) | ||
| { | ||
| std::ostringstream cmd_out; | ||
|
|
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| // Create the getunit metatable. | ||
| cmd_out << "Adding color metatable...\n"; | ||
|
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| luaL_newmetatable(L, colorKey); | ||
| lua_pushcfunction(L, impl_color_collect); | ||
| lua_setfield(L, -2, "__gc"); | ||
| lua_pushcfunction(L, impl_color_equality); | ||
| lua_setfield(L, -2, "__eq"); | ||
| lua_pushcfunction(L, impl_color_tostring); | ||
| lua_setfield(L, -2, "__tostring"); | ||
| lua_pushcfunction(L, impl_color_get); | ||
| lua_setfield(L, -2, "__index"); | ||
| lua_pushcfunction(L, impl_color_set); | ||
| lua_setfield(L, -2, "__newindex"); | ||
| lua_pushstring(L, "color range"); | ||
| lua_setfield(L, -2, "__metatable"); | ||
|
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|
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| // Create the current variable with its metatable. | ||
| cmd_out << "Adding wesnoth.colors table...\n"; | ||
|
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| lua_getglobal(L, "wesnoth"); | ||
| lua_newuserdata(L, 0); | ||
| lua_createtable(L, 0, 2); | ||
| lua_pushcfunction(L, impl_get_color); | ||
| lua_setfield(L, -2, "__index"); | ||
| lua_pushstring(L, "colors table"); | ||
| lua_setfield(L, -2, "__metatable"); | ||
| lua_setmetatable(L, -2); | ||
| lua_setfield(L, -2, "colors"); | ||
| lua_pop(L, 1); | ||
|
|
||
| return cmd_out.str(); | ||
| } | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| /* | ||
| Copyright (C) 2020-2020 by the Battle for Wesnoth Project https://www.wesnoth.org/ | ||
| This program 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; either version 2 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. | ||
| See the COPYING file for more details. | ||
| */ | ||
|
|
||
| #include <string> | ||
| struct lua_State; | ||
|
|
||
| namespace lua_colors { | ||
| std::string register_metatables(lua_State* L); | ||
| } |
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