kakoune/doc/pages/options.asciidoc

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= Options
== Description
Kakoune can store named and typed values that can be used both to
customize the core editor behaviour, and to store data used by extension
scripts.
[[set-option]]
Options can be modified using the `set-option` command:
---------------------------------
set-option [-add] <scope> <name> <value>
---------------------------------
<scope> can be *global*, *buffer*, *window* or *current* (See
<<scopes#,`:doc scopes`>>). *current* relates to the narrowest scope in
which the option is already set.
If `-add` is specified, the new value is *added* to the current one
instead of replacing it (the exact outcome depends on the type, see below).
[[unset-option]]
Options values can be unset in a specific scope with the `unset-option`
command:
---------------------------
unset-option <scope> <name>
---------------------------
Unsetting an option will make it fallback to the value of its parent mode,
hence options cannot be unset from the *global* scope.
[[declare-option]]
New options can be declared using the `declare-option` command:
------------------------------------------------
declare-option [-hidden] <type> <name> [<value>]
------------------------------------------------
If `-hidden` is specified, the option will not be displayed in completion
suggestions.
[[update-option]]
Certain option type can be *updated*, usually to match potential changes
in the buffer they relate to. This can be triggered by the `update-option`
command:
----------------------------
update-option <scope> <name>
----------------------------
== Types
All options have a type, which defines how they are translated to/from
text and their set of valid values.
Some types are usable for user defined options while some other types
are exclusively available to built-in options.
*int*::
an integer number.
`set -add` performs a math addition
*bool*::
a boolean value, yes/true or no/false
*str*::
a string, some freeform text
*regex*::
as a string but the set commands will complain if the entered text
is not a valid regex
*coord*::
a line, column pair (separated by a comma)
*<type>-list*::
a list, elements are separated by a colon (:) if an element needs
to contain a colon, it can be escaped with a backslash.
`set -add` appends the new element to the list
*range-specs*::
a `:` separated list of a pair of a buffer range (`<begin
line>.<begin column>,<end line>.<end column>` or `<begin line>.<begin
column>+<length>`) and a string (separated by `|`), except for the
first element which is just the timestamp of the buffer. When the
`update-option` is used on an option of this type, its ranges gets
updated according to all the buffer modifications that happened
since its timestamp.
See <<highlighters#specs-highlighters,`:doc highlighters specs-highlighters`>>)
`set -add` appends the new pair to the list
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*line-specs*::
a `:` separated list of a line number and a corresponding flag
(`<line>|<flag text>`), except for the first element which is just
the timestamp of the buffer. When the `update-option` is used on
an option of this type, its lines gets updated according to all the
buffer modifications that happened since its timestamp.
See <<highlighters#specs-highlighters,`:doc highlighters specs-highlighters`>>)
`set -add` appends the new spec to the list
*completions*::
a `:` separated list of `<text>|<docstring>|<menu text>`
candidates, except for the first element which follows the
`<line>.<column>[+<length>]@<timestamp>` format to define where the
completion apply in the buffer. Markup can be used in the menu text.
*enum(value1|value2|...)*::
an enum, taking one of the given values
*flags(value1|value2|...)*::
a set of flags, taking a combination of the given values joined by a
'|' character.
`set -add` adds the new flag to the combination
*<type>-to-<type>-map*::
a `:` separated list of `key=value` pairs.
`set -add` adds the new pair to the hashmap or replace an already
existing key.
== Builtin options
*tabstop* `int`::
_default_ 8 +
width of a tab character
*indentwidth* `int`::
_default_ 4 +
width (in spaces) used for indentation, 0 means a tab character
*scrolloff* `coord`::
_default_ 0,0 +
number of lines, columns to keep visible around the cursor when
scrolling
*eolformat* `enum(lf|crlf)`::
_default_ lf +
the format of end of lines when writing a buffer, this is autodetected
on load; values of this option assigned to the `window` scope are
ignored
*BOM* `enum(none|utf8)`::
_default_ none +
define if the file should be written with a unicode byte order mark;
values of this option assigned to the `window` scope are ignored
*readonly* `bool`::
_default_ false +
prevent modifications from being saved to disk, all buffers if set
to `true` in the `global` scope, or current buffer if set in the
`buffer` scope; values of this option assigned to the `window`
scope are ignored
*incsearch* `bool`::
_default_ true +
execute search as it is typed
*aligntab* `bool`::
_default_ false +
use tabs for alignment command
*autoinfo* `flags(command|onkey|normal)`::
_default_ command|onkey +
display automatic information box in the enabled contexts
*autoshowcompl* `bool`::
_default_ true +
automatically display possible completions when editing a prompt
*ignored_files* `regex`::
filenames matching this regex won't be considered as candidates
on filename completion (except if the text being completed already
matches it)
*disabled_hooks* `regex`::
hooks whose group matches this regex won't be executed. For example
indentation hooks can be disabled with `.*-indent`
*filetype* `str`::
arbitrary string defining the type of the file filetype dependant
actions should hook on this option changing for activation/deactivation
*path* `str-list`::
_default_ ./:%/:/usr/include +
directories to search for *gf* command and filenames completion
`%/` represents the current buffer directory
*completers* `completer-list`::
_default_ filename:word=all +
completion engines to use for insert mode completion (they are tried
in order until one generates candidates). Existing completers are:
*word=all*, *word=buffer*:::
which complete using words in all buffers (*word=all*)
or only the current one (*word=buffer*)
*filename*:::
which tries to detect when a filename is being entered and
provides completion based on local filesystem
*line*:::
which complete using lines in current buffer
*option=<opt-name>*:::
where *opt-name* is an option of type 'completions' whose
contents will be used
*static_words* `str-list`::
list of words that are always added to completion candidates
when completing words in insert mode
*extra_word_chars* `codepoint-list`::
a list of all additional codepoints that should be considered
as word character.
*matching_pairs* `codepoint-list`::
_default_ `(:):{:}:[:]:<:>`
a list of codepoints that are to be treated as matching pairs
for the *m* command.
*autoreload* `enum(yes|no|ask)`::
_default_ ask +
auto reload the buffers when an external modification is detected
*debug* `flags(hooks|shell|profile|keys|commands)`::
dump various debug information in the '\*debug*' buffer
*idle_timeout* `int`::
_default_ 50 +
timeout, in milliseconds, with no user input that will trigger the
*PromptIdle*, *InsertIdle* and *NormalIdle* hooks, and autocompletion.
*fs_checkout_timeout* `int`::
_default_ 500 +
timeout, in milliseconds, between checks in normal mode of modifications
of the file associated with the current buffer on the filesystem.
*modelinefmt* `string`::
A format string used to generate the mode line, that string is
first expanded as a command line would be (expanding '%...{...}'
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strings), then markup tags are applied (See <<expansions#,`:doc expansions`>>)
Two special atoms are available as markup:
*`{{mode_info}}`*:::
Information about the current mode, such as `insert 3 sel` or
`prompt`. The faces used are StatusLineMode, StatusLineInfo,
and StatusLineValue.
*`{{context_info}}`*:::
Information such as `[+][recording (@)][no-hooks][new file][fifo]`,
in face Information.
The default value is '%val{bufname} %val{cursor_line}:%val{cursor_char_column} {{context_info}} {{mode_info}} - %val{client}@[%val{session}]'
*ui_options* `str-to-str-map`::
colon separated list of key=value pairs that are forwarded to the user
interface implementation. The NCurses UI support the following options:
*ncurses_set_title*:::
if *yes* or *true*, the terminal emulator title will
be changed
*ncurses_status_on_top*:::
if *yes*, or *true* the status line will be placed
at the top of the terminal rather than at the bottom
*ncurses_assistant*:::
specify the nice assistant displayed in info boxes,
can be *clippy* (the default), *cat*, *dilbert* or *none*
*ncurses_enable_mouse*:::
boolean option that enables mouse support
*ncurses_change_colors*:::
boolean option that can disable color palette changing if the
terminfo enables it but the terminal does not support it.
*ncurses_wheel_down_button*, *ncurses_wheel_up_button*:::
specify which button send for wheel down/up events