1 Minetest Lua Mainmenu API Reference 5.9.0
2 =========================================
7 The main menu is defined as a formspec by Lua in `builtin/mainmenu/`
8 Description of formspec language to show your menu is in `lua_api.md`
14 * `core.button_handler(fields)`: called when a button is pressed.
15 * `fields` = `{name1 = value1, name2 = value2, ...}`
16 * `core.event_handler(event)`
17 * `event`: `"MenuQuit"`, `"KeyEnter"`, `"ExitButton"` or `"EditBoxEnter"`
23 The "gamedata" table is read when calling `core.start()`. It should contain:
28 password = <password>,
29 address = <IP/address>,
31 selected_world = <index>, -- 0 for client mode
32 singleplayer = <true/false>,
44 * `core.get_min_supp_proto()`
45 * returns the minimum supported network protocol version
46 * `core.get_max_supp_proto()`
47 * returns the maximum supported network protocol version
48 * `core.open_url(url)`
49 * opens the URL in a web browser, returns false on failure.
50 * Must begin with http:// or https://
51 * `core.open_dir(path)`
52 * opens the path in the system file browser/explorer, returns false on failure.
53 * Must be an existing directory.
54 * `core.share_file(path)`
55 * Android only. Shares file using the share popup
56 * `core.get_version()` (possible in async calls)
57 * returns current core version
64 * `core.get_builtin_path()`
65 * returns path to builtin root
66 * `core.create_dir(absolute_path)` (possible in async calls)
67 * `absolute_path` to directory to create (needs to be absolute)
69 * `core.delete_dir(absolute_path)` (possible in async calls)
70 * `absolute_path` to directory to delete (needs to be absolute)
72 * `core.copy_dir(source,destination,keep_source)` (possible in async calls)
74 * `destination` folder
75 * `keep_source` DEFAULT true --> if set to false `source` is deleted after copying
77 * `core.is_dir(path)` (possible in async calls)
78 * returns true if `path` is a valid dir
79 * `core.extract_zip(zipfile,destination)` [unzip within path required]
80 * `zipfile` to extract
81 * `destination` folder to extract to
83 * `core.sound_play(spec, looped)` -> handle
84 * `spec` = `SimpleSoundSpec` (see `lua_api.md`)
86 * `handle:stop()` or `core.sound_stop(handle)`
87 * `core.get_video_drivers()`
88 * get list of video drivers supported by engine (not all modes are guaranteed to work)
89 * returns list of available video drivers' settings name and 'friendly' display name
90 e.g. `{ {name="opengl", friendly_name="OpenGL"}, {name="software", friendly_name="Software Renderer"} }`
91 * first element of returned list is guaranteed to be the NULL driver
92 * `core.get_mapgen_names([include_hidden=false])` -> table of map generator algorithms
93 registered in the core (possible in async calls)
94 * `core.get_cache_path()` -> path of cache
95 * `core.get_temp_path([param])` (possible in async calls)
96 * `param`=true: returns path to a temporary file
97 otherwise: returns path to the temporary folder
103 * `core.download_file(url, target)` (possible in async calls)
104 * `url` to download, and `target` to store to
106 * `core.get_http_api()` (possible in async calls)
107 * returns `HTTPApiTable` containing http functions.
108 * The returned table contains the functions `fetch_sync`, `fetch_async` and
109 `fetch_async_get` described below.
110 * Function only exists if minetest server was built with cURL support.
111 * `HTTPApiTable.fetch_sync(HTTPRequest req)`: returns HTTPRequestResult
112 * Performs given request synchronously
113 * `HTTPApiTable.fetch_async(HTTPRequest req)`: returns handle
114 * Performs given request asynchronously and returns handle for
115 `HTTPApiTable.fetch_async_get`
116 * `HTTPApiTable.fetch_async_get(handle)`: returns `HTTPRequestResult`
117 * Return response data for given asynchronous HTTP request
119 ### `HTTPRequest` definition
121 Used by `HTTPApiTable.fetch` and `HTTPApiTable.fetch_async`.
125 url = "http://example.org",
128 -- Timeout for connection in seconds. Default is 3 seconds.
130 post_data = "Raw POST request data string" OR {field1 = "data1", field2 = "data2"},
131 -- Optional, if specified a POST request with post_data is performed.
132 -- Accepts both a string and a table. If a table is specified, encodes
133 -- table as x-www-form-urlencoded key-value pairs.
134 -- If post_data is not specified, a GET request is performed instead.
136 user_agent = "ExampleUserAgent",
137 -- Optional, if specified replaces the default minetest user agent with
140 extra_headers = { "Accept-Language: en-us", "Accept-Charset: utf-8" },
141 -- Optional, if specified adds additional headers to the HTTP request.
142 -- You must make sure that the header strings follow HTTP specification
146 -- Optional, if true performs a multipart HTTP request.
151 ### `HTTPRequestResult` definition
153 Passed to `HTTPApiTable.fetch` callback. Returned by
154 `HTTPApiTable.fetch_async_get`.
159 -- If true, the request has finished (either succeeded, failed or timed
163 -- If true, the request was successful
166 -- If true, the request timed out
179 * `core.update_formspec(formspec)`
180 * `core.get_table_index(tablename)` -> index
181 * can also handle textlists
182 * `core.formspec_escape(string)` -> string
183 * escapes characters [ ] \ , ; that cannot be used in formspecs
184 * `core.explode_table_event(string)` -> table
185 * returns e.g. `{type="CHG", row=1, column=2}`
186 * `type`: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click)
187 * `core.explode_textlist_event(string)` -> table
188 * returns e.g. `{type="CHG", index=1}`
189 * `type`: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click)
190 * `core.set_formspec_prepend(formspec)`
191 * `formspec`: string to be added to every mainmenu formspec, to be used for theming.
197 * `core.set_background(type,texturepath,[tile],[minsize])`
198 * `type`: "background", "overlay", "header" or "footer"
199 * `tile`: tile the image instead of scaling (background only)
200 * `minsize`: minimum tile size, images are scaled to at least this size prior
201 doing tiling (background only)
202 * `core.set_clouds(<true/false>)`
203 * `core.set_topleft_text(text)`
204 * `core.show_keys_menu()`
205 * `core.show_path_select_dialog(formname, caption, is_file_select)`
206 * shows a path select dialog
207 * `formname` is base name of dialog response returned in fields
208 - if dialog was accepted `"_accepted"`
209 will be added to fieldname containing the path
210 - if dialog was canceled `"_cancelled"`
211 will be added to fieldname value is set to formname itself
212 * if `is_file_select` is `true`, a file and not a folder will be selected
213 * returns nil or selected file/folder
214 * `core.get_active_driver()`:
215 * technical name of active video driver, e.g. "opengl"
216 * `core.get_active_renderer()`:
217 * name of current renderer, e.g. "OpenGL 4.6"
218 * `core.get_active_irrlicht_device()`:
219 * name of current irrlicht device, e.g. "SDL"
220 * `core.get_window_info()`: Same as server-side `get_player_window_information` API.
223 -- Note that none of these things are constant, they are likely to change
224 -- as the player resizes the window and moves it between monitors
226 -- real_gui_scaling and real_hud_scaling can be used instead of DPI.
227 -- OSes don't necessarily give the physical DPI, as they may allow user configuration.
228 -- real_*_scaling is just OS DPI / 96 but with another level of user configuration.
230 -- Current size of the in-game render target.
232 -- This is usually the window size, but may be smaller in certain situations,
233 -- such as side-by-side mode.
239 -- Estimated maximum formspec size before Minetest will start shrinking the
240 -- formspec to fit. For a fullscreen formspec, use a size 10-20% larger than
241 -- this and `padding[-0.01,-0.01]`.
242 max_formspec_size = {
247 -- GUI Scaling multiplier
248 -- Equal to the setting `gui_scaling` multiplied by `dpi / 96`
249 real_gui_scaling = 1,
251 -- HUD Scaling multiplier
252 -- Equal to the setting `hud_scaling` multiplied by `dpi / 96`
253 real_hud_scaling = 1,
255 -- Whether the touchscreen controls are enabled.
256 -- Usually (but not always) `true` on Android.
257 touch_controls = false,
266 Content - an installed mod, modpack, game, or texture pack (txt)
267 Package - content which is downloadable from the content db, may or may not be installed.
269 * `core.get_user_path()` (possible in async calls)
270 * returns path to global user data,
271 the directory that contains user-provided mods, worlds, games, and texture packs.
272 * `core.get_modpath()` (possible in async calls)
273 * returns path to global modpath in the user path, where mods can be installed
274 * `core.get_modpaths()` (possible in async calls)
275 * returns table of virtual path to global modpaths, where mods have been installed
276 The difference with `core.get_modpath` is that no mods should be installed in these
277 directories by Minetest -- they might be read-only.
283 mods = "/home/user/.minetest/mods",
284 share = "/usr/share/minetest/mods",
286 -- Custom dirs can be specified by the MINETEST_MOD_DIR env variable
287 ["/path/to/custom/dir"] = "/path/to/custom/dir",
291 * `core.get_clientmodpath()` (possible in async calls)
292 * returns path to global client-side modpath
293 * `core.get_gamepath()` (possible in async calls)
294 * returns path to global gamepath
295 * `core.get_texturepath()` (possible in async calls)
296 * returns path to default textures
297 * `core.get_games()` -> table of all games (possible in async calls)
298 * `name` in return value is deprecated, use `title` instead.
299 * returns a table (ipairs) with values:
303 path = <full path to game>,
304 gamemods_path = <path>,
305 title = <title of game>,
306 menuicon_path = <full path to menuicon>,
309 addon_mods_paths = {[1] = <path>,},
312 * `core.get_content_info(path)`
316 name = "technical_id",
317 type = "mod" or "modpack" or "game" or "txp",
318 title = "Human readable title",
319 description = "description",
321 path = "path/to/content",
322 textdomain = "textdomain", -- textdomain to translate title / description with
323 depends = {"mod", "names"}, -- mods only
324 optional_depends = {"mod", "names"}, -- mods only
327 * `core.check_mod_configuration(world_path, mod_paths)`
328 * Checks whether configuration is valid.
329 * `world_path`: path to the world
330 * `mod_paths`: list of enabled mod paths
334 is_consistent = true, -- true is consistent, false otherwise
335 unsatisfied_mods = {}, -- list of mod specs
336 satisfied_mods = {}, -- list of mod specs
337 error_message = "", -- message or nil
340 * `core.get_content_translation(path, domain, string)`
341 * Translates `string` using `domain` in content directory at `path`.
342 * Textdomains will be found by looking through all locale folders.
343 * String should contain translation markup from `core.translate(textdomain, ...)`.
344 * Ex: `core.get_content_translation("mods/mymod", "mymod", core.translate("mymod", "Hello World"))`
345 will translate "Hello World" into the current user's language
346 using `mods/mymod/locale/mymod.fr.tr`.
351 * `core.debug(line)` (possible in async calls)
352 * Always printed to `stderr` and logfile (`print()` is redirected here)
353 * `core.log(line)` (possible in async calls)
354 * `core.log(loglevel, line)` (possible in async calls)
355 * `loglevel` one of "error", "action", "info", "verbose"
361 * `core.settings:set(name, value)`
362 * `core.settings:get(name)` -> string or nil (possible in async calls)
363 * `core.settings:set_bool(name, value)`
364 * `core.settings:get_bool(name)` -> bool or nil (possible in async calls)
365 * `core.settings:save()` -> nil, save all settings to config file
367 For a complete list of methods of the `Settings` object see
368 [lua_api.md](https://github.com/minetest/minetest/blob/master/doc/lua_api.md)
374 * `core.get_worlds()` -> list of worlds (possible in async calls)
379 path = <full path to world>,
380 name = <name of world>,
381 gameid = <gameid of world>,
385 * `core.create_world(worldname, gameid, init_settings)`
386 * `core.delete_world(index)`
392 * `core.get_us_time()`
393 * returns time with microsecond precision
394 * `core.gettext(string)` -> string
395 * look up the translation of a string in the gettext message catalog
396 * `fgettext_ne(string, ...)`
397 * call `core.gettext(string)`, replace "$1"..."$9" with the given
398 extra arguments and return the result
399 * `fgettext(string, ...)` -> string
400 * same as `fgettext_ne()`, but calls `core.formspec_escape` before returning result
401 * `core.parse_json(string[, nullvalue])` -> something (possible in async calls)
402 * see `core.parse_json` (`lua_api.md`)
403 * `dump(obj, dumped={})`
404 * Return object serialized as a string
405 * `string:split(separator)`
406 * eg. `string:split("a,b", ",")` == `{"a","b"}`
408 * eg. `string.trim("\n \t\tfoo bar\t ")` == `"foo bar"`
409 * `core.is_yes(arg)` (possible in async calls)
410 * returns whether `arg` can be interpreted as yes
411 * `core.encode_base64(string)` (possible in async calls)
412 * Encodes a string in base64.
413 * `core.decode_base64(string)` (possible in async calls)
414 * Decodes a string encoded in base64.
415 * `core.urlencode(str)`: Encodes non-unreserved URI characters by a
416 percent sign followed by two hex digits. See
417 [RFC 3986, section 2.3](https://datatracker.ietf.org/doc/html/rfc3986#section-2.3).
423 * `core.handle_async(async_job,parameters,finished)`
424 * execute a function asynchronously
425 * `async_job` is a function receiving one parameter and returning one parameter
426 * `parameters` parameter table passed to `async_job`
427 * `finished` function to be called once `async_job` has finished
428 the result of `async_job` is passed to this function
430 ### Limitations of Async operations
431 * No access to global lua variables, don't even try
432 * Limited set of available functions
433 e.g. No access to functions modifying menu like `core.start`, `core.close`,
434 `core.show_path_select_dialog`
440 The main menu supports background music.
441 It looks for a `main_menu` sound in `$USER_PATH/sounds`. The same naming
442 conventions as for normal sounds apply.
443 This means the player can add a custom sound.
444 It will be played in the main menu (gain = 1.0), looped.