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241 lines
7.5 KiB
Plaintext
241 lines
7.5 KiB
Plaintext
kakoune(k)
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==========
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NAME
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----
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highlighters - a
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Description
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-----------
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Manipulation of the displayed text is done through highlighters, which can
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be added or removed with the following commands:
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---------------------------------------------------------------
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add-highlighter <highlighter_name> <highlighter_parameters> ...
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---------------------------------------------------------------
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and
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-----------------------------------
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remove-highlighter <highlighter_id>
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-----------------------------------
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*highlighter_id* is a name generated by the highlighter specified with
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*highlighter_name*, possibly dependent on the parameters. Use command
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completion in a prompt on the *remove-highlighter* command to see the existing highlighters
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ids.
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General highlighters
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--------------------
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*regex* <ex> <capture_id>:<face> ...::
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highlight a regex, takes the regex as first parameter, followed by
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any number of face parameters. For example:
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---------------------------------------------------------------
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add-highlighter regex //(\hTODO:)?[^\n] 0:cyan 1:yellow,red
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---------------------------------------------------------------
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will highlight C++ style comments in cyan, with an eventual 'TODO:'
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in yellow on red background
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*dynregex*::
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Similar to regex, but expand (like a command parameter would) the
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given expression before building a regex from the result
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*flag_lines* <face> <option_name>::
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add a column in front of the buffer, and display the flags specified
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in <option_name>, using <face>
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*show_matching*::
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highlight matching char of the character under the selections' cursor
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using MatchingChar face
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*show_whitespaces* [options]::
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display symbols on top of whitespaces to make them more explicit
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using the Whitespace face, with the following *options*:
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*-lf* <separator>:::
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a one character long separator that will replace line feeds
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*-spc* <separator>:::
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a one character long separator that will replace spaces
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*-nbsp* <separator>:::
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a one character long separator that will replace non-breakable spaces
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*-tab* <separator>:::
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a one character long separator that will replace tabulations
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*-tabpad* <separator>:::
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a one character long separator that will be appended to tabulations to honor the *tabstop* option
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*number_lines* [options]::
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show line numbers, with the following *options*:
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*-relative*:::
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show line numbers relative to the main cursor line
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*-hlcursor*:::
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highlight the cursor line with a separate face
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*-separator* <separator text>:::
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specify a string to separate the line numbers column with
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the rest of the buffer (default is '|')
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*wrap* [options]::
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soft wrap buffer text at window width, with the following *options*:
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*-word*:::
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wrap at word boundaries instead of codepoint boundaries.
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*-width <max_width>*:::
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wrap text at *max_width* if the window is wider.
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*ranges* <option_name>::
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use the data in the range-specs option of the given name to highlight
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the buffer. The string part of the is interpretted as a face to apply
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to the range.
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*replace-ranges* <option_name>::
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use the data in the range-specs option of the given name to highlight
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the buffer. The string part of the is interpretted as a display line to
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display in place of the range.
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*fill* <face>::
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fill using the given *face*, mostly useful with regions highlighters
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Highlighting Groups
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-------------------
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The group highlighter is a container for other highlighters. You can add a
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group to the current window using
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----------------------------
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add-highlighter group <name>
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----------------------------
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The *-group* switch of the *add-highlighter* command provides a mean to add highlighters
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inside this group:
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------------------------------------------------
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add-highlighter -group <name> <type> <params>...
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------------------------------------------------
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Groups can contain other groups, the *-group* switch can be used to define
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a path as follows:
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----------------------------------------------------------
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add-highlighter -group <name> group <subname>
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add-highlighter -group <name>/<subname> <type> <params>...
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----------------------------------------------------------
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Regions highlighters
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--------------------
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A special highlighter provides a way to segment the buffer into regions,
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which are to be highlighted differently.
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*name*::
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user defined, used to identify the region
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*opening*::
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regex that defines the region start text
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*closing*::
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regex that defines the region end text
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*recurse*::
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regex that defines the text that matches recursively an end token
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into the region
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The *recurse* option is useful for regions that can be nested, for example
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the following contruct:
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----------
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%sh{ ... }
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----------
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accepts nested braces scopes ('{ ... }') so the following string is valid:
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----------------------
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%sh{ ... { ... } ... }
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----------------------
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This region can be defined with:
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------------------------
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shell_expand %sh\{ \} \{
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------------------------
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Regions are used in the region highlighters which can take any number
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of regions.
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The following command:
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------------------------------------------------------------------------------
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add-highlighter regions <name> <region_name1> <opening1> <closing1> <recurse1>
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<region_name2> <opening2> <closing2> <recurse2>...
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------------------------------------------------------------------------------
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defines multiple regions in which other highlighters can be added as follows:
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-----------------------------------------------
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add-highlighter -group <name>/<region_name> ...
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-----------------------------------------------
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Regions are matched using the left-most rule: the left-most region opening
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starts a new region. When a region closes, the closest next opening start
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another region.
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That matches the rule governing most programming language parsing.
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Regions also supports a *-default <default_region>* switch to define the
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default region, when no other region matches the current buffer range.
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If the *-match-capture* switch is passed, then region closing and recurse
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matches are considered valid for a given region opening match only if they
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matched the same content for the capture 1.
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Most programming languages can then be properly highlighted using a region
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highlighter as root:
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-----------------------------------------------------------------
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add-highlighter regions -default code <lang> \
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string <str_opening> <str_closing> <str_recurse> \
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comment <comment_opening> <comment_closing> <comment_recurse>
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add-highlighter -group <lang>/code ...
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add-highlighter -group <lang>/string ...
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add-highlighter -group <lang>/comment ...
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-----------------------------------------------------------------
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Shared Highlighters
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-------------------
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Highlighters are often defined for a specific filetype, and it makes then
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sense to share the highlighters between all the windows on the same filetypes.
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A shared highlighter can be defined with the following command:
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----------------------------------------
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add-highlighter -group /<group_name> ...
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----------------------------------------
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When the group switch values starts with a '/', it references a group in
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the shared highlighters, rather than the window highlighters.
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The common case would be to create a named shared group, and then fill it
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with highlighters:
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--------------------------------------
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add-highlighter -group / group <name>
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add-highlighter -group /name regex ...
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--------------------------------------
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It can then be referenced in a window using the ref highlighter.
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--------------------------
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add-highlighter ref <name>
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--------------------------
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The ref can reference any named highlighter in the shared namespace.
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