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'main': Set fallback style for the 'arg0' style.

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The fallback style name uses '_' in anticipation of a future auto-fallback
feature keyed on style names.

'arg0' was previously known as 'commandtypefromthefuture'.
This commit is contained in:
Daniel Shahaf 2016-08-16 17:24:58 +00:00
parent f3242cbd6a
commit b4537a972e
2 changed files with 25 additions and 1 deletions
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23
docs/highlighters/main.md
View file

@ -44,6 +44,7 @@ This highlighter defines the following styles:
* `assign` - parameter assignments
* `redirection` - redirection operators (`<`, `>`, etc)
* `comment` - comments, when `setopt INTERACTIVE_COMMENTS` is in effect (`echo # foo`)
* `arg0` - a command word other than one of those enumrated above (other than a command, precommand, alias, function, or shell builtin command).
* `default` - everything else
To override one of those styles, change its entry in `ZSH_HIGHLIGHT_STYLES`,
@ -65,4 +66,26 @@ The syntax for values is the same as the syntax of "types of highlighting" of
the zsh builtin `$zle_highlight` array, which is documented in [the `zshzle(1)`
manual page][zshzle-Character-Highlighting].
### Useless trivia
#### Forward compatibility.
zsh-syntax-highlighting attempts to be forward-compatible with zsh.
Specifically, we attempt to facilitate highlighting _command word_ types that
had not yet been invented when this version of zsh-syntax-highlighting was
released.
A _command word_ is something like a function name, external command name, et
cetera. (See
[Simple Commands & Pipelines in `zshmisc(1)`][zshmisc-Simple-Commands-And-Pipelines]
for a formal definition.)
If a new _kind_ of command word is ever added to zsh — something conceptually
different than "function" and "alias" and "external command" — then command words
of that (new) kind will be highlighted by the style `arg0_$kind`,
where `$kind` is the output of `type -w` on the new kind of command word. If that
style is not defined, then the style `arg0` will be used instead.
[zshmisc-Simple-Commands-And-Pipelines]: http://zsh.sourceforge.net/Doc/Release/Shell-Grammar.html#Simple-Commands-_0026-Pipelines
[zshzle-Character-Highlighting]: http://zsh.sourceforge.net/Doc/Release/Zsh-Line-Editor.html#Character-Highlighting

3
highlighters/main/main-highlighter.zsh
View file

@ -58,6 +58,7 @@
: ${ZSH_HIGHLIGHT_STYLES[assign]:=none}
: ${ZSH_HIGHLIGHT_STYLES[redirection]:=none}
: ${ZSH_HIGHLIGHT_STYLES[comment]:=fg=black,bold}
: ${ZSH_HIGHLIGHT_STYLES[arg0]:=fg=green}
# Whether the highlighter should be called or not.
_zsh_highlight_main_highlighter_predicate()
@ -488,7 +489,7 @@ _zsh_highlight_main_highlighter()
fi
fi
;;
*) _zsh_highlight_main_add_region_highlight $start_pos $end_pos commandtypefromthefuture-$res
*) _zsh_highlight_main_add_region_highlight $start_pos $end_pos arg0_$res arg0
already_added=1
;;
esac