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kakoune/rc/base/scala.kak

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# http://scala-lang.org
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](scala) %{
set-option buffer filetype scala
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/ regions -default code scala \
string '"' (?<!\\)(\\\\)*" '' \
literal ` ` '' \
comment // $ '' \
comment /[*] [*]/ /[*]
add-highlighter shared/scala/string fill string
add-highlighter shared/scala/literal fill variable
add-highlighter shared/scala/comment fill comment
# Keywords are collected at
# http://tutorialspoint.com/scala/scala_basic_syntax.htm
add-highlighter shared/scala/code regex (?:\b|\W)(@\w+|import|package)\b 0:meta
add-highlighter shared/scala/code regex \b(true|false|null)\b 0:value
add-highlighter shared/scala/code regex \b(?:class|extends|with)\s+(\w+) 0:type
add-highlighter shared/scala/code regex \b([A-Z]\w*)\b 0:type
add-highlighter shared/scala/code regex (?:def|var|val)\s+(\w+) 0:variable
add-highlighter shared/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|this|super|throw|trait|try|unbecome|using|val|var|when|while|with|yield)\b 0:keyword
add-highlighter shared/scala/code regex \b(abstract|final|implicit|implicitly|lazy|override|private|protected|require|sealed)\b 0:attribute
add-highlighter shared/scala/code regex (\[|\]|=>|<:|:>|=:=|::|&&|\|\|) 0:operator
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden scala-filter-around-selections %{
# remove trailing white spaces
try %{ execute-keys -draft -itersel <a-x> s \h+$ <ret> d }
}
define-command -hidden scala-indent-on-new-line %[
evaluate-commands -draft -itersel %[
# copy // comments prefix and following white spaces
try %[ execute-keys -draft k <a-x> s ^\h*\K#\h* <ret> y gh j P ]
# preserve previous line indent
try %[ execute-keys -draft \; K <a-&> ]
# filter previous line
try %[ execute-keys -draft k : scala-filter-around-selections <ret> ]
# indent after lines ending with {
try %[ execute-keys -draft k <a-x> <a-k> \{$ <ret> j <a-gt> ]
]
]
define-command -hidden scala-indent-on-closing-curly-brace %[
evaluate-commands -draft -itersel %[
# align to opening curly brace when alone on a line
try %[ execute-keys -draft <a-h> <a-k> ^\h+\}$ <ret> m s \A|.\z <ret> 1<a-&> ]
]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group scala-highlight global WinSetOption filetype=scala %{ add-highlighter window ref scala }
hook global WinSetOption filetype=scala %[
hook window ModeChange insert:.* -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
]
hook -group scala-highlight global WinSetOption filetype=(?!scala).* %{ remove-highlighter window/scala }
hook global WinSetOption filetype=(?!scala).* %{
remove-hooks window scala-indent
remove-hooks window scala-hooks
}