Save a “default” theme, inherited from other mods

Most likely minetest_game’s `default` mod.

init.lua

@@ -19,6 +19,7 @@ fs_themes.themes = {}
 local storage = minetest.get_mod_storage()
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 
+
 -- Set a player’s theme by a registered theme’s name.
 -- If dont_save is provided, the player’s default theme won’t change.
 function fs_themes.set_theme(player, theme_name, dont_save)
@@ -34,16 +35,9 @@ function fs_themes.set_theme(player, theme_name, dont_save)
 end
 
 
--- Register a theme, given a name and a formspec-file’s path.
+-- Register a theme, given a name and a formspec string.
-function fs_themes.register_theme(name, formspecs_file_path)
+function fs_themes.register_theme(name, formspec_str)
-	local fs_file, open_err = io.open(formspecs_file_path, "r")
+	fs_themes.themes[name] = formspec_str
-	if fs_file == nil then
-		minetest.log("warning", string.format("Theme “%s” could not be opened: %s", name, open_err))
-		return false
-	end
-
-	local fs_file_contents = fs_file:read("*all")
-	fs_themes.themes[name] = fs_file_contents
 	return true
 end
 
@@ -61,11 +55,9 @@ minetest.register_chatcommand(
 					ret = ret .. ", " .. name
 				end
 			end
-
 			if ret == nil then
 				ret = "No themes are installed!"
 			end
-
 			return true, ret
 		end
 	}
@@ -94,9 +86,14 @@ minetest.register_chatcommand(
 minetest.register_on_joinplayer(
 	function(player)
 		local player_name = player:get_player_name()
-		local default_theme = minetest.settings:get("fs_default_theme") or "restaurant"
+		local default_theme = minetest.settings:get("fs_default_theme")
 		local player_theme = storage:get_string(player_name)
 
+		-- Set the “default” theme (inherited from whatever mods load before fs_themes)
+		if not fs_themes.themes["default"] then
+			fs_themes.themes["default"] = player:get_formspec_prepend()
+		end
+
 		-- If a player has a preferred theme we cannot use, complain & use default.
 		if player_theme ~= "" and not fs_themes.set_theme(player, player_theme) then
 			minetest.chat_send_player(
@@ -106,7 +103,7 @@ minetest.register_on_joinplayer(
 			storage:set_string(player_name, "")
 		end
 
-		if player_theme == "" then
+		if player_theme == "" and default_theme and default_theme ~= "" then
 			fs_themes.set_theme(player, default_theme)
 		end
 	end
@@ -117,5 +114,12 @@ minetest.register_on_joinplayer(
 local theme_dir_path = modpath .. "/themes/"
 local theme_file_paths = minetest.get_dir_list(theme_dir_path, false)
 for _, file_name in pairs(theme_file_paths) do
-	fs_themes.register_theme(file_name, theme_dir_path .. file_name)
+	local fs_file, open_err = io.open(theme_dir_path .. file_name, "r")
+	if fs_file == nil then
+		minetest.log("warning", string.format("Theme “%s” could not be opened: %s", name, open_err))
+		return false
+	end
+
+	local fs_file_contents = fs_file:read("*all")
+	fs_themes.register_theme(file_name, fs_file_contents)
 end

settingtypes.txt

@@ -1 +1 @@
-fs_default_theme (Default theme for Formspecs) string restaurant
+fs_default_theme (Default theme for Formspecs) string