Brick.Keybindings.Parse

This module provides key binding string parsing functions for use in e.g. reading key bindings from configuration files.

Documentation

parseBinding :: Text -> Either String Binding

Parse a key binding string. Key binding strings specify zero or more modifier keys and a base key, separated by hyphens.

(modifier "-")* key

e.g. c-down, backspace, ctrl-shift-f1.

where each modifier is parsed case-insensitively as follows:

• "s", "shift": MShift
• "m", "meta": MMeta
• "a", "alt": MAlt
• "c", "ctrl", "control": MCtrl

and key is parsed case-insensitively as follows:

• "f1", "f2", ...: KFun
• "esc": KEsc
• "backspace": KBS
• "enter": KEnter
• "left": KLeft
• "right": KRight
• "up": KUp
• "down": KDown
• "upleft": KUpLeft
• "upright": KUpRight
• "downleft": KDownLeft
• "downright": KDownRight
• "center": KCenter
• "backtab": KBackTab
• "printscreen": KPrtScr
• "pause": KPause
• "insert": KIns
• "home": KHome
• "pgup": KPageUp
• "del": KDel
• "end": KEnd
• "pgdown": KPageDown
• "begin": KBegin
• "menu": KMenu
• "space": ' '
• "tab": '\t'
• Otherwise, KChar

parseBindingList :: Text -> Either String BindingState

Parse a key binding list into a BindingState.

A key binding list either the string "unbound" or is a comma-separated list of Bindings parsed with parseBinding.

keybindingsFromIni

Arguments

:: KeyEvents k

The key event name mapping to use to parse the configuration data.

-> Text

The name of the INI configuration section to read.

-> Text

The text of the INI document to read.

-> Either String (Maybe [(k, BindingState)])

Parse custom key bindings from the specified INI file using the provided event name mapping.

Each line in the specified section can take the form

<event-name> = <"unbound"|[binding,...]>

where the event name must be a valid event name in the specified KeyEvents and each binding is valid as parsed by parseBinding.

Returns Nothing if the named section was not found; otherwise returns a (possibly empty) list of binding states for each event in evs.

keybindingsFromFile

Arguments

:: KeyEvents k

The key event name mapping to use to parse the configuration data.

-> Text

The name of the INI configuration section to read.

-> FilePath

The path to the INI file to read.

-> IO (Either String (Maybe [(k, BindingState)]))

Parse custom key binidngs from the specified INI file path. This does not catch or convert any exceptions resulting from I/O errors. See keybindingsFromIni for details.

keybindingIniParser :: KeyEvents k -> Text -> IniParser (Maybe [(k, BindingState)])

The low-level INI parser for custom key bindings used by this module, exported for applications that use the config-ini package.