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348 lines
11 KiB
Plaintext
348 lines
11 KiB
Plaintext
Minetest Lua Mainmenu API Reference 5.5.0
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=========================================
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Introduction
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-------------
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The main menu is defined as a formspec by Lua in builtin/mainmenu/
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Description of formspec language to show your menu is in lua_api.txt
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Callbacks
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---------
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core.button_handler(fields): called when a button is pressed.
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^ fields = {name1 = value1, name2 = value2, ...}
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core.event_handler(event)
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^ event: "MenuQuit", "KeyEnter", "ExitButton" or "EditBoxEnter"
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Gamedata
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--------
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The "gamedata" table is read when calling core.start(). It should contain:
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{
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playername = <name>,
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password = <password>,
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address = <IP/adress>,
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port = <port>,
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selected_world = <index>, -- 0 for client mode
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singleplayer = <true/false>,
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}
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Functions
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---------
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core.start()
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core.close()
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core.get_min_supp_proto()
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^ returns the minimum supported network protocol version
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core.get_max_supp_proto()
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^ returns the maximum supported network protocol version
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core.open_url(url)
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^ opens the URL in a web browser, returns false on failure.
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^ Must begin with http:// or https://
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core.open_dir(path)
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^ opens the path in the system file browser/explorer, returns false on failure.
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^ Must be an existing directory.
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core.get_version() (possible in async calls)
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^ returns current core version
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Filesystem
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----------
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core.get_builtin_path()
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^ returns path to builtin root
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core.create_dir(absolute_path) (possible in async calls)
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^ absolute_path to directory to create (needs to be absolute)
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^ returns true/false
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core.delete_dir(absolute_path) (possible in async calls)
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^ absolute_path to directory to delete (needs to be absolute)
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^ returns true/false
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core.copy_dir(source,destination,keep_soure) (possible in async calls)
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^ source folder
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^ destination folder
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^ keep_source DEFAULT true --> if set to false source is deleted after copying
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^ returns true/false
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core.is_dir(path) (possible in async calls)
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^ returns true if path is a valid dir
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core.extract_zip(zipfile,destination) [unzip within path required]
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^ zipfile to extract
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^ destination folder to extract to
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^ returns true/false
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core.sound_play(spec, looped) -> handle
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^ spec = SimpleSoundSpec (see lua-api.txt)
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^ looped = bool
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core.sound_stop(handle)
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core.get_video_drivers()
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^ get list of video drivers supported by engine (not all modes are guaranteed to work)
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^ returns list of available video drivers' settings name and 'friendly' display name
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^ e.g. { {name="opengl", friendly_name="OpenGL"}, {name="software", friendly_name="Software Renderer"} }
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^ first element of returned list is guaranteed to be the NULL driver
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core.get_mapgen_names([include_hidden=false]) -> table of map generator algorithms
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registered in the core (possible in async calls)
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core.get_cache_path() -> path of cache
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core.get_temp_path() -> path of temp folder
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HTTP Requests
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-------------
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* core.download_file(url, target) (possible in async calls)
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* url to download, and target to store to
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* returns true/false
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* `minetest.get_http_api()` (possible in async calls)
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* returns `HTTPApiTable` containing http functions.
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* The returned table contains the functions `fetch_sync`, `fetch_async` and
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`fetch_async_get` described below.
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* Function only exists if minetest server was built with cURL support.
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* `HTTPApiTable.fetch_sync(HTTPRequest req)`: returns HTTPRequestResult
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* Performs given request synchronously
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* `HTTPApiTable.fetch_async(HTTPRequest req)`: returns handle
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* Performs given request asynchronously and returns handle for
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`HTTPApiTable.fetch_async_get`
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* `HTTPApiTable.fetch_async_get(handle)`: returns HTTPRequestResult
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* Return response data for given asynchronous HTTP request
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### `HTTPRequest` definition
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Used by `HTTPApiTable.fetch` and `HTTPApiTable.fetch_async`.
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{
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url = "http://example.org",
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timeout = 10,
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-- Timeout for connection in seconds. Default is 3 seconds.
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post_data = "Raw POST request data string" OR {field1 = "data1", field2 = "data2"},
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-- Optional, if specified a POST request with post_data is performed.
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-- Accepts both a string and a table. If a table is specified, encodes
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-- table as x-www-form-urlencoded key-value pairs.
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-- If post_data is not specified, a GET request is performed instead.
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user_agent = "ExampleUserAgent",
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-- Optional, if specified replaces the default minetest user agent with
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-- given string
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extra_headers = { "Accept-Language: en-us", "Accept-Charset: utf-8" },
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-- Optional, if specified adds additional headers to the HTTP request.
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-- You must make sure that the header strings follow HTTP specification
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-- ("Key: Value").
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multipart = boolean
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-- Optional, if true performs a multipart HTTP request.
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-- Default is false.
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}
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### `HTTPRequestResult` definition
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Passed to `HTTPApiTable.fetch` callback. Returned by
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`HTTPApiTable.fetch_async_get`.
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{
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completed = true,
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-- If true, the request has finished (either succeeded, failed or timed
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-- out)
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succeeded = true,
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-- If true, the request was successful
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timeout = false,
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-- If true, the request timed out
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code = 200,
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-- HTTP status code
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data = "response"
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}
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Formspec
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--------
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core.update_formspec(formspec)
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core.get_table_index(tablename) -> index
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^ can also handle textlists
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core.formspec_escape(string) -> string
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^ escapes characters [ ] \ , ; that can not be used in formspecs
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core.explode_table_event(string) -> table
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^ returns e.g. {type="CHG", row=1, column=2}
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^ type: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click)
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core.explode_textlist_event(string) -> table
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^ returns e.g. {type="CHG", index=1}
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^ type: "INV" (no row selected), "CHG" (selected) or "DCL" (double-click)
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core.set_formspec_prepend(formspec)
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^ string to be added to every mainmenu formspec, to be used for theming.
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GUI
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---
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core.set_background(type, texturepath,[tile],[minsize])
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^ type: "background", "overlay", "header" or "footer"
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^ tile: tile the image instead of scaling (background only)
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^ minsize: minimum tile size, images are scaled to at least this size prior
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^ doing tiling (background only)
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core.set_clouds(<true/false>)
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core.set_topleft_text(text)
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core.show_keys_menu()
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core.show_path_select_dialog(formname, caption, is_file_select)
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^ shows a path select dialog
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^ formname is base name of dialog response returned in fields
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^ -if dialog was accepted "_accepted"
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^ will be added to fieldname containing the path
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^ -if dialog was canceled "_cancelled"
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^ will be added to fieldname value is set to formname itself
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^ if `is_file_select` is `true`, a file and not a folder will be selected
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^ returns nil or selected file/folder
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core.get_screen_info()
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^ returns {
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density = <screen density 0.75,1.0,2.0,3.0 ... (dpi)>,
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display_width = <width of display>,
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display_height = <height of display>,
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window_width = <current window width>,
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window_height = <current window height>
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}
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Content and Packages
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--------------------
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Content - an installed mod, modpack, game, or texture pack (txt)
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Package - content which is downloadable from the content db, may or may not be installed.
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* core.get_user_path() (possible in async calls)
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* returns path to global user data,
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the directory that contains user-provided mods, worlds, games, and texture packs.
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* core.get_modpath() (possible in async calls)
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* returns path to global modpath
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* core.get_clientmodpath() (possible in async calls)
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* returns path to global client-side modpath
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* core.get_gamepath() (possible in async calls)
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* returns path to global gamepath
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* core.get_texturepath() (possible in async calls)
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* returns path to default textures
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* core.get_game(index)
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* returns:
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{
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id = <id>,
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path = <full path to game>,
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gamemods_path = <path>,
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name = <name of game>,
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menuicon_path = <full path to menuicon>,
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author = "author",
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DEPRECATED:
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addon_mods_paths = {[1] = <path>,},
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}
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* core.get_games() -> table of all games in upper format (possible in async calls)
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* core.get_content_info(path)
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* returns
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{
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name = "name of content",
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type = "mod" or "modpack" or "game" or "txp",
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description = "description",
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author = "author",
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path = "path/to/content",
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depends = {"mod", "names"}, -- mods only
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optional_depends = {"mod", "names"}, -- mods only
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}
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Logging
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-------
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core.debug(line) (possible in async calls)
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^ Always printed to stderr and logfile (print() is redirected here)
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core.log(line) (possible in async calls)
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core.log(loglevel, line) (possible in async calls)
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^ loglevel one of "error", "action", "info", "verbose"
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Settings
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--------
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core.settings:set(name, value)
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core.settings:get(name) -> string or nil (possible in async calls)
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core.settings:set_bool(name, value)
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core.settings:get_bool(name) -> bool or nil (possible in async calls)
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core.settings:save() -> nil, save all settings to config file
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For a complete list of methods of the Settings object see
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[lua_api.txt](https://github.com/minetest/minetest/blob/master/doc/lua_api.txt)
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Worlds
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------
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core.get_worlds() -> list of worlds (possible in async calls)
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^ returns {
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[1] = {
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path = <full path to world>,
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name = <name of world>,
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gameid = <gameid of world>,
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},
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}
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core.create_world(worldname, gameid)
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core.delete_world(index)
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Helpers
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-------
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core.get_us_time()
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^ returns time with microsecond precision
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core.gettext(string) -> string
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^ look up the translation of a string in the gettext message catalog
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fgettext_ne(string, ...)
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^ call core.gettext(string), replace "$1"..."$9" with the given
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^ extra arguments and return the result
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fgettext(string, ...) -> string
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^ same as fgettext_ne(), but calls core.formspec_escape before returning result
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core.parse_json(string[, nullvalue]) -> something (possible in async calls)
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^ see core.parse_json (lua_api.txt)
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dump(obj, dumped={})
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^ Return object serialized as a string
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string:split(separator)
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^ eg. string:split("a,b", ",") == {"a","b"}
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string:trim()
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^ eg. string.trim("\n \t\tfoo bar\t ") == "foo bar"
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core.is_yes(arg) (possible in async calls)
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^ returns whether arg can be interpreted as yes
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minetest.encode_base64(string) (possible in async calls)
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^ Encodes a string in base64.
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minetest.decode_base64(string) (possible in async calls)
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^ Decodes a string encoded in base64.
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Async
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-----
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core.handle_async(async_job,parameters,finished)
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^ execute a function asynchronously
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^ async_job is a function receiving one parameter and returning one parameter
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^ parameters parameter table passed to async_job
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^ finished function to be called once async_job has finished
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^ the result of async_job is passed to this function
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Limitations of Async operations
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-No access to global lua variables, don't even try
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-Limited set of available functions
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e.g. No access to functions modifying menu like core.start,core.close,
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core.show_path_select_dialog
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Background music
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----------------
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The main menu supports background music.
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It looks for a `main_menu` sound in `$USER_PATH/sounds`. The same naming
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conventions as for normal sounds apply.
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This means the player can add a custom sound.
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It will be played in the main menu (gain = 1.0), looped.
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