show key name in keybinding form

builtin/common/settings/dlg_change_keybinding.lua

@@ -24,7 +24,7 @@ local function get_formspec(dialogdata)
 
 	local cells = {}
 	for _, key in ipairs(value) do
-		table.insert(cells, core.formspec_escape(key))
+		table.insert(cells, core.formspec_escape(core.get_keycode_name(key)))
 	end
 	table.insert(fs, ("textlist[0.5,1.3;5,4;keylist;%s;%d;false]"):format(table.concat(cells, ","), selection))
 

src/script/lua_api/l_menu_common.cpp

@@ -42,6 +42,14 @@ int ModApiMenuCommon::l_normalize_keycode(lua_State *L)
 	return 1;
 }
 
+int ModApiMenuCommon::l_get_keycode_name(lua_State *L)
+{
+	auto keystr = luaL_checkstring(L, 1);
+	auto name = KeyPress(keystr).name();
+	lua_pushstring(L, name.empty() ? "" : gettext(name.c_str()));
+	return 1;
+}
+
 
 void ModApiMenuCommon::Initialize(lua_State *L, int top)
 {
@@ -49,6 +57,7 @@ void ModApiMenuCommon::Initialize(lua_State *L, int top)
 	API_FCT(get_active_driver);
 	API_FCT(irrlicht_device_supports_touch);
 	API_FCT(normalize_keycode);
+	API_FCT(get_keycode_name);
 }
 
 

src/script/lua_api/l_menu_common.h

@@ -14,6 +14,7 @@ private:
 	static int l_get_active_driver(lua_State *L);
 	static int l_irrlicht_device_supports_touch(lua_State *L);
 	static int l_normalize_keycode(lua_State *L);
+	static int l_get_keycode_name(lua_State *L);
 
 public:
 	static void Initialize(lua_State *L, int top);