kakoune/rc/base/scala.kak

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# http://scala-lang.org
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufSetOption mimetype=text/x-scala %{
set buffer filetype scala
}
hook global BufCreate .*[.](scala) %{
set buffer filetype scala
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
addhl -group / regions -default code scala \
string '"' (?<!\\)(\\\\)*" '' \
literal ` ` '' \
comment // $ '' \
comment /[*] [*]/ /[*]
addhl -group /scala/string fill string
addhl -group /scala/literal fill identifier
addhl -group /scala/comment fill comment
# Keywords are collected at
# http://tutorialspoint.com/scala/scala_basic_syntax.htm
addhl -group /scala/code regex \b(import|package)\b 0:meta
addhl -group /scala/code regex \b(this|true|false|null)\b 0:value
addhl -group /scala/code regex \b(become|case|catch|class|def|do|else|extends|final|finally|for|forSome|goto|if|initialize|macro|match|new|object|onTransition|return|startWith|stay|throw|trait|try|unbecome|using|val|var|when|while|with|yield)\b 0:keyword
addhl -group /scala/code regex \b(abstract|final|implicit|implicitly|lazy|override|private|protected|require|sealed|super)\b 0:attribute
addhl -group /scala/code regex \b(⇒|=>|<:|:>|=:=|::|&&|\|\|)\b 0:operator
addhl -group /scala/code regex "'[_A-Za-z0-9$]+" 0:identifier
# Commands
# ‾‾‾‾‾‾‾‾
def -hidden _scala_filter_around_selections %{
# remove trailing white spaces
try %{ exec -draft -itersel <a-x> s \h+$ <ret> d }
}
def -hidden _scala_indent_on_new_line %[
eval -draft -itersel %[
# preserve previous line indent
try %[ exec -draft <space> K <a-&> ]
# filter previous line
try %[ exec -draft k : _scala_filter_around_selections <ret> ]
# copy // comments prefix and following white spaces
try %[ exec -draft k x s ^\h*\K#\h* <ret> y j p ]
# indent after lines ending with {
try %[ exec -draft k x <a-k> \{$ <ret> j <a-gt> ]
]
]
def -hidden _scala_indent_on_closing_curly_brace %[
eval -draft -itersel %[
# align to opening curly brace when alone on a line
try %[ exec -draft <a-h> <a-k> ^\h+\}$ <ret> m s \`|.\' <ret> 1<a-&> ]
]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group scala-highlight global WinSetOption filetype=scala %{ addhl ref scala }
hook global WinSetOption filetype=scala %[
hook window InsertEnd .* -group scala-hooks _scala_filter_around_selections
hook window InsertChar \n -group scala-indent _scala_indent_on_new_line
hook window InsertChar \} -group scala-indent _scala_indent_on_closing_curly_brace
]
hool -group scala-highlight global WinSetOption filetype=(?!scala).* %{ rmhl scala }
hook global WinSetOption filetype=(?!scala).* %{
rmhooks window scala-indent
rmhooks window scala-hooks
}