[client] Add titlebar_get()

Signed-off-by: Julien Danjou <julien@danjou.info>

client.c

@@ -1155,6 +1155,20 @@ luaA_client_titlebar_set(lua_State *L)
     return 0;
 }
 
+/** Get the titlebar of a client.
+ * \return A titlebar or nil if the client has no titlebar.
+ */
+static int
+luaA_client_titlebar_get(lua_State *L)
+{
+    client_t **c = luaL_checkudata(L, 1, "client");
+
+    if((*c)->titlebar)
+        return luaA_titlebar_userdata_new((*c)->titlebar);
+
+    return 0;
+}
+
 /** Stop managing a client.
  */
 static int
@@ -1184,6 +1198,7 @@ const struct luaL_reg awesome_client_methods[] =
 const struct luaL_reg awesome_client_meta[] =
 {
     { "titlebar_set", luaA_client_titlebar_set },
+    { "titlebar_get", luaA_client_titlebar_get },
     { "name_get", luaA_client_name_get },
     { "name_set", luaA_client_name_set },
     { "screen_set", luaA_client_screen_set },

titlebar.c

@@ -478,6 +478,18 @@ luaA_titlebar_widget_get(lua_State *L)
     return 1;
 }
 
+/** Create a new titlebar userdata.
+ * \param t The titlebar.
+ */
+int
+luaA_titlebar_userdata_new(titlebar_t *t)
+{
+    titlebar_t **tb = lua_newuserdata(globalconf.L, sizeof(titlebar_t *));
+    *tb = t;
+    titlebar_ref(tb);
+    return luaA_settype(globalconf.L, "titlebar");
+}
+
 static int
 luaA_titlebar_gc(lua_State *L)
 {

titlebar.h

@@ -30,6 +30,8 @@ void titlebar_update_geometry_floating(client_t *);
 void titlebar_update_geometry(client_t *, area_t);
 void titlebar_init(client_t *);
 
+int luaA_titlebar_userdata_new(titlebar_t *);
+
 /** Add the titlebar geometry to a geometry.
  * \param t the titlebar
  * \param geometry the geometry

widget.c

@@ -299,8 +299,7 @@ widget_invalidate_bywidget(widget_t *widget)
 int
 luaA_widget_userdata_new(widget_t *widget)
 {
-    widget_t **w;
+    widget_t **w = lua_newuserdata(globalconf.L, sizeof(widget_t *));
-    w = lua_newuserdata(globalconf.L, sizeof(widget_t *));
     *w = widget;
     widget_ref(w);
     return luaA_settype(globalconf.L, "widget");