Minetest Lua Mainmenu API Reference 5.7.0 ========================================= Introduction ------------- The main menu is defined as a formspec by Lua in builtin/mainmenu/ Description of formspec language to show your menu is in lua_api.txt Callbacks --------- core.button_handler(fields): called when a button is pressed. ^ fields = {name1 = value1, name2 = value2, ...} core.event_handler(event) ^ event: "MenuQuit", "KeyEnter", "ExitButton" or "EditBoxEnter" Gamedata -------- The "gamedata" table is read when calling core.start(). It should contain: { playername = , password = , address = , port = , selected_world = , -- 0 for client mode singleplayer = , } Functions --------- core.start() core.close() core.get_min_supp_proto() ^ returns the minimum supported network protocol version core.get_max_supp_proto() ^ returns the maximum supported network protocol version core.open_url(url) ^ opens the URL in a web browser, returns false on failure. ^ Must begin with http:// or https:// core.open_dir(path) ^ opens the path in the system file browser/explorer, returns false on failure. ^ Must be an existing directory. core.share_file(path) ^ Android only. Shares file using the share popup core.get_version() (possible in async calls) ^ returns current core version Filesystem ---------- core.get_builtin_path() ^ returns path to builtin root core.create_dir(absolute_path) (possible in async calls) ^ absolute_path to directory to create (needs to be absolute) ^ returns true/false core.delete_dir(absolute_path) (possible in async calls) ^ absolute_path to directory to delete (needs to be absolute) ^ returns true/false core.copy_dir(source,destination,keep_soure) (possible in async calls) ^ source folder ^ destination folder ^ keep_source DEFAULT true --> if set to false source is deleted after copying ^ returns true/false core.is_dir(path) (possible in async calls) ^ returns true if path is a valid dir core.extract_zip(zipfile,destination) [unzip within path required] ^ zipfile to extract ^ destination folder to extract to ^ returns true/false core.sound_play(spec, looped) -> handle ^ spec = SimpleSoundSpec (see lua-api.txt) ^ looped = bool core.sound_stop(handle) core.get_video_drivers() ^ get list of video drivers supported by engine (not all modes are guaranteed to work) ^ returns list of available video drivers' settings name and 'friendly' display name ^ e.g. { {name="opengl", friendly_name="OpenGL"}, {name="software", friendly_name="Software Renderer"} } ^ first element of returned list is guaranteed to be the NULL driver core.get_mapgen_names([include_hidden=false]) -> table of map generator algorithms registered in the core (possible in async calls) core.get_cache_path() -> path of cache core.get_temp_path([param]) (possible in async calls) ^ param=true: returns path to a temporary file ^ otherwise: returns path to the temporary folder HTTP Requests ------------- * core.download_file(url, target) (possible in async calls) * url to download, and target to store to * returns true/false * `minetest.get_http_api()` (possible in async calls) * returns `HTTPApiTable` containing http functions. * The returned table contains the functions `fetch_sync`, `fetch_async` and `fetch_async_get` described below. * Function only exists if minetest server was built with cURL support. * `HTTPApiTable.fetch_sync(HTTPRequest req)`: returns HTTPRequestResult * Performs given request synchronously * `HTTPApiTable.fetch_async(HTTPRequest req)`: returns handle * Performs given request asynchronously and returns handle for `HTTPApiTable.fetch_async_get` * `HTTPApiTable.fetch_async_get(handle)`: returns HTTPRequestResult * Return response data for given asynchronous HTTP request ### `HTTPRequest` definition Used by `HTTPApiTable.fetch` and `HTTPApiTable.fetch_async`. { url = "http://example.org", timeout = 10, -- Timeout for connection in seconds. Default is 3 seconds. post_data = "Raw POST request data string" OR {field1 = "data1", field2 = "data2"}, -- Optional, if specified a POST request with post_data is performed. -- Accepts both a string and a table. If a table is specified, encodes -- table as x-www-form-urlencoded key-value pairs. -- If post_data is not specified, a GET request is performed instead. user_agent = "ExampleUserAgent", -- Optional, if specified replaces the default minetest user agent with -- given string extra_headers = { "Accept-Language: en-us", "Accept-Charset: utf-8" }, -- Optional, if specified adds additional headers to the HTTP request. -- You must make sure that the header strings follow HTTP specification -- ("Key: Value"). multipart = boolean -- Optional, if true performs a multipart HTTP request. -- Default is false. } ### `HTTPRequestResult` definition Passed to `HTTPApiTable.fetch` callback. Returned by `HTTPApiTable.fetch_async_get`. { completed = true, -- If true, the request has finished (either succeeded, failed or timed -- out) succeeded = true, -- If true, the request was successful timeout = false, -- If true, the request timed out code = 200, -- HTTP status code data = "response" } Formspec -------- core.update_formspec(formspec) core.get_table_index(tablename) -> index ^ can also handle textlists core.formspec_escape(string) -> string ^ escapes characters [ ] \ , ; that can not be used in formspecs core.explode_table_event(string) -> table ^ returns e.g. {type="CHG", row=1, column=2} ^ type: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click) core.explode_textlist_event(string) -> table ^ returns e.g. {type="CHG", index=1} ^ type: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click) core.set_formspec_prepend(formspec) ^ string to be added to every mainmenu formspec, to be used for theming. GUI --- core.set_background(type, texturepath,[tile],[minsize]) ^ type: "background", "overlay", "header" or "footer" ^ tile: tile the image instead of scaling (background only) ^ minsize: minimum tile size, images are scaled to at least this size prior ^ doing tiling (background only) core.set_clouds() core.set_topleft_text(text) core.show_keys_menu() core.show_path_select_dialog(formname, caption, is_file_select) ^ shows a path select dialog ^ formname is base name of dialog response returned in fields ^ -if dialog was accepted "_accepted" ^ will be added to fieldname containing the path ^ -if dialog was canceled "_cancelled" ^ will be added to fieldname value is set to formname itself ^ if `is_file_select` is `true`, a file and not a folder will be selected ^ returns nil or selected file/folder core.get_screen_info() ^ returns { density = , display_width = , display_height = , window_width = , window_height = , render_info = } Content and Packages -------------------- Content - an installed mod, modpack, game, or texture pack (txt) Package - content which is downloadable from the content db, may or may not be installed. * core.get_user_path() (possible in async calls) * returns path to global user data, the directory that contains user-provided mods, worlds, games, and texture packs. * core.get_modpath() (possible in async calls) * returns path to global modpath in the user path, where mods can be installed * core.get_modpaths() (possible in async calls) * returns table of virtual path to global modpaths, where mods have been installed The difference with "core.get_modpath" is that no mods should be installed in these directories by Minetest -- they might be read-only. Ex: ``` { mods = "/home/user/.minetest/mods", share = "/usr/share/minetest/mods", -- Custom dirs can be specified by the MINETEST_MOD_DIR env variable ["/path/to/custom/dir"] = "/path/to/custom/dir", } ``` * core.get_clientmodpath() (possible in async calls) * returns path to global client-side modpath * core.get_gamepath() (possible in async calls) * returns path to global gamepath * core.get_texturepath() (possible in async calls) * returns path to default textures * core.get_game(index) * `name` in return value is deprecated, use `title` instead. * returns: { id = , path = , gamemods_path = , title = , menuicon_path = <full path to menuicon>, author = "author", DEPRECATED: addon_mods_paths = {[1] = <path>,}, } * core.get_games() -> table of all games in upper format (possible in async calls) * core.get_content_info(path) * returns { name = "technical_id", type = "mod" or "modpack" or "game" or "txp", title = "Human readable title", description = "description", author = "author", path = "path/to/content", depends = {"mod", "names"}, -- mods only optional_depends = {"mod", "names"}, -- mods only } * core.check_mod_configuration(world_path, mod_paths) * Checks whether configuration is valid. * `world_path`: path to the world * `mod_paths`: list of enabled mod paths * returns: { is_consistent = true, -- true is consistent, false otherwise unsatisfied_mods = {}, -- list of mod specs satisfied_mods = {}, -- list of mod specs error_message = "", -- message or nil } Logging ------- core.debug(line) (possible in async calls) ^ Always printed to stderr and logfile (print() is redirected here) core.log(line) (possible in async calls) core.log(loglevel, line) (possible in async calls) ^ loglevel one of "error", "action", "info", "verbose" Settings -------- core.settings:set(name, value) core.settings:get(name) -> string or nil (possible in async calls) core.settings:set_bool(name, value) core.settings:get_bool(name) -> bool or nil (possible in async calls) core.settings:save() -> nil, save all settings to config file For a complete list of methods of the Settings object see [lua_api.txt](https://github.com/minetest/minetest/blob/master/doc/lua_api.txt) Worlds ------ core.get_worlds() -> list of worlds (possible in async calls) ^ returns { [1] = { path = <full path to world>, name = <name of world>, gameid = <gameid of world>, }, } core.create_world(worldname, gameid) core.delete_world(index) Helpers ------- core.get_us_time() ^ returns time with microsecond precision core.gettext(string) -> string ^ look up the translation of a string in the gettext message catalog fgettext_ne(string, ...) ^ call core.gettext(string), replace "$1"..."$9" with the given ^ extra arguments and return the result fgettext(string, ...) -> string ^ same as fgettext_ne(), but calls core.formspec_escape before returning result core.parse_json(string[, nullvalue]) -> something (possible in async calls) ^ see core.parse_json (lua_api.txt) dump(obj, dumped={}) ^ Return object serialized as a string string:split(separator) ^ eg. string:split("a,b", ",") == {"a","b"} string:trim() ^ eg. string.trim("\n \t\tfoo bar\t ") == "foo bar" core.is_yes(arg) (possible in async calls) ^ returns whether arg can be interpreted as yes minetest.encode_base64(string) (possible in async calls) ^ Encodes a string in base64. minetest.decode_base64(string) (possible in async calls) ^ Decodes a string encoded in base64. Async ----- core.handle_async(async_job,parameters,finished) ^ execute a function asynchronously ^ async_job is a function receiving one parameter and returning one parameter ^ parameters parameter table passed to async_job ^ finished function to be called once async_job has finished ^ the result of async_job is passed to this function Limitations of Async operations -No access to global lua variables, don't even try -Limited set of available functions e.g. No access to functions modifying menu like core.start,core.close, core.show_path_select_dialog Background music ---------------- The main menu supports background music. It looks for a `main_menu` sound in `$USER_PATH/sounds`. The same naming conventions as for normal sounds apply. This means the player can add a custom sound. It will be played in the main menu (gain = 1.0), looped.