Be more intelligent about handling tolua++ user types.

configure.ac.in

@@ -457,6 +457,7 @@ if test x$want_lua = xyes; then
 		want_lua_cairo=no
 		want_lua_imlib2=no
 	else
+		AC_DEFINE(LUA_EXTRAS, 1, [Define if you want Lua extras])
 		if test "x$want_x11" != "xyes"; then
 			dnl silently disable if no x11
 			want_lua_cairo=no
@@ -486,7 +487,9 @@ if test x$want_lua = xyes; then
 							   AC_MSG_ERROR([tolua_error not found]),
 							   $LUA51_LIBS)
 			fi
+			conky_LIBS="$conky_LIBS $tolua_LIBS"
 		fi
+
 	fi
 	AC_DEFINE(HAVE_LUA, 1, [Define if you want Lua scripting support])
 fi

doc/lua.xml

@@ -27,59 +27,59 @@
                 <member>
                     <command>drawable</command>
                     <option>Window's drawable (Xlib
-                    Drawable)</option>
+                    Drawable), requires Lua extras enabled at compile time.</option>
                 </member>
                 <member>
                     <command>visual</command>
-                    <option>Window's visual (Xlib Visual)</option>
+                    <option>Window's visual (Xlib Visual), requires Lua extras enabled at compile time.</option>
                 </member>
                 <member>
                     <command>display</command>
                     <option>Window's display (Xlib
-                    Display)</option>
+                    Display), requires Lua extras enabled at compile time.</option>
                 </member>
                 <member>
                     <command>width</command>
-                    <option>Window width (in pixels)</option>
+                    <option>Window width (in pixels).</option>
                 </member>
                 <member>
                     <command>height</command>
-                    <option>Window height (in pixels)</option>
+                    <option>Window height (in pixels).</option>
                 </member>
                 <member>
                     <command>border_inner_margin</command>
                     <option>Window's inner border margin (in
-                    pixels)</option>
+                    pixels).</option>
                 </member>
                 <member>
                     <command>border_outer_margin</command>
                     <option>Window's outer border margin (in
-                    pixels)</option>
+                    pixels).</option>
                 </member>
                 <member>
                     <command>border_width</command>
                     <option>Window's border width (in
-                    pixels)</option>
+                    pixels).</option>
                 </member>
                 <member>
                     <command>text_start_x</command>
                     <option>The x component of the starting
-                    coordinate of text drawing</option>
+                    coordinate of text drawing.</option>
                 </member>
                 <member>
                     <command>text_start_y</command>
                     <option>The y component of the starting
-                    coordinate of text drawing</option>
+                    coordinate of text drawing.</option>
                 </member>
                 <member>
                     <command>text_width</command>
                     <option>The width of the text drawing
-                    region</option>
+                    region.</option>
                 </member>
                 <member>
                     <command>text_height</command>
                     <option>The height of the text drawing
-                    region</option>
+                    region.</option>
                 </member>
             </simplelist>
             <para>NOTE: This table is only defined when X support

src/llua.c

@@ -23,6 +23,10 @@
 #include "logging.h"
 #include "build.h"
 
+#ifdef LUA_EXTRAS
+#include <tolua++.h>
+#endif /* LUA_EXTRAS */
+
 #ifdef HAVE_SYS_INOTIFY_H
 #include <sys/inotify.h>
 
@@ -95,6 +99,14 @@ void llua_init(void)
 
 	lua_pushcfunction(lua_L, &llua_conky_parse);
 	lua_setglobal(lua_L, "conky_parse");
+
+#if defined(X11) && defined(LUA_EXTRAS)
+	/* register tolua++ user types */
+	tolua_open(lua_L);
+	tolua_usertype(lua_L, "Drawable");
+	tolua_usertype(lua_L, "Visual");
+	tolua_usertype(lua_L, "Display");
+#endif /* X11 */
 }
 
 void llua_load(const char *script)
@@ -118,9 +130,9 @@ void llua_load(const char *script)
 
 /*
    llua_do_call does a flexible call to any Lua function
-	string: <function> [par1] [par2...]
+string: <function> [par1] [par2...]
-	retc: the number of return values expected
+retc: the number of return values expected
-*/
+ */
 char *llua_do_call(const char *string, int retc)
 {
 	static char func[64];
@@ -375,62 +387,9 @@ void llua_set_long(const char *key, long value)
 	lua_setfield(lua_L, -2, key);
 }
 
-/* this function mostly copied from tolua++ source so that we could play nice
- * with tolua++ libs.  tolua++ is provided 'as is'
- */
 void llua_set_userdata(const char *key, const char *type, void *value)
 {
-	if (value == NULL) {
+	tolua_pushusertype(lua_L, value, type);
-		lua_pushnil(lua_L);
-	} else {
-		luaL_getmetatable(lua_L, type);
-		lua_pushstring(lua_L,"tolua_ubox");
-		lua_rawget(lua_L,-2);        /* stack: mt ubox */
-		if (lua_isnil(lua_L, -1)) {
-			lua_pop(lua_L, 1);
-			lua_pushstring(lua_L, "tolua_ubox");
-			lua_rawget(lua_L, LUA_REGISTRYINDEX);
-		}
-		lua_pushlightuserdata(lua_L,value);
-		lua_rawget(lua_L,-2);                       /* stack: mt ubox ubox[u] */
-		if (lua_isnil(lua_L,-1)) {
-			lua_pop(lua_L,1);                          /* stack: mt ubox */
-			lua_pushlightuserdata(lua_L,value);
-			*(void**)lua_newuserdata(lua_L,sizeof(void *)) = value;   /* stack: mt ubox u newud */
-			lua_pushvalue(lua_L,-1);                   /* stack: mt ubox u newud newud */
-			lua_insert(lua_L,-4);                      /* stack: mt newud ubox u newud */
-			lua_rawset(lua_L,-3);                      /* stack: mt newud ubox */
-			lua_pop(lua_L,1);                          /* stack: mt newud */
-			/*luaL_getmetatable(lua_L,type);*/
-			lua_pushvalue(lua_L, -2);			/* stack: mt newud mt */
-			lua_setmetatable(lua_L,-2);			/* stack: mt newud */
-
-		} else {
-			/* check the need of updating the metatable to a more specialized class */
-			lua_insert(lua_L,-2);                       /* stack: mt ubox[u] ubox */
-			lua_pop(lua_L,1);                           /* stack: mt ubox[u] */
-			lua_pushstring(lua_L,"tolua_super");
-			lua_rawget(lua_L,LUA_REGISTRYINDEX);        /* stack: mt ubox[u] super */
-			lua_getmetatable(lua_L,-2);                 /* stack: mt ubox[u] super mt */
-			lua_rawget(lua_L,-2);                       /* stack: mt ubox[u] super super[mt] */
-			if (lua_istable(lua_L,-1)) {
-				lua_pushstring(lua_L,type);                 /* stack: mt ubox[u] super super[mt] type */
-				lua_rawget(lua_L,-2);                       /* stack: mt ubox[u] super super[mt] flag */
-				if (lua_toboolean(lua_L,-1) == 1) {
-					/* if true */
-					lua_pop(lua_L,3);	/* mt ubox[u]*/
-					lua_remove(lua_L, -2);
-					return;
-				}
-			}
-			/* type represents a more specilized type */
-			/*luaL_getmetatable(lua_L,type);             // stack: mt ubox[u] super super[mt] flag mt */
-			lua_pushvalue(lua_L, -5);					/* stack: mt ubox[u] super super[mt] flag mt */
-			lua_setmetatable(lua_L,-5);                /* stack: mt ubox[u] super super[mt] flag */
-			lua_pop(lua_L,3);                          /* stack: mt ubox[u] */
-		}
-		lua_remove(lua_L, -2);	/* stack: ubox[u]*/
-	}
 	lua_setfield(lua_L, -2, key);
 }
 
@@ -440,9 +399,11 @@ void llua_setup_window_table(int text_start_x, int text_start_y, int text_width,
 	lua_newtable(lua_L);
 
 	if (output_methods & TO_X) {
+#ifdef LUA_EXTRAS
 		llua_set_userdata("drawable", "Drawable", (void*)&window.drawable);
 		llua_set_userdata("visual", "Visual", window.visual);
 		llua_set_userdata("display", "Display", display);
+#endif /* LUA_EXTRAS */
 
 
 		llua_set_long("width", window.width);