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kakoune/rc/extra/cabal.kak
2016-10-01 14:09:59 +01:00

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# http://haskell.org/cabal
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufSetOption mimetype=text/x-cabal %{
set buffer filetype cabal
}
hook global BufCreate .*[.](cabal) %{
set buffer filetype cabal
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
addhl -group / regions -default code cabal \
comment (--) $ '' \
comment \{- -\} \{-
addhl -group /cabal/comment fill comment
addhl -group /cabal/code regex \b(true|false)\b|(([<>]?=?)?\d+(\.\d+)+) 0:value
addhl -group /cabal/code regex \b(if|else)\b 0:keyword
addhl -group /cabal/code regex ^\h*([A-Za-z][A-Za-z0-9_-]*)\h*: 1:identifier
# Commands
# ‾‾‾‾‾‾‾‾
def -hidden _cabal_filter_around_selections %{
# remove trailing white spaces
try %{ exec -draft -itersel <a-x> s \h+$ <ret> d }
}
def -hidden _cabal_indent_on_new_line %[
eval -draft -itersel %[
# preserve previous line indent
try %[ exec -draft <space> K <a-&> ]
# filter previous line
try %[ exec -draft k : _cabal_filter_around_selections <ret> ]
# copy '#' comment prefix and following white spaces
try %[ exec -draft k x s ^\h*\K#\h* <ret> y j p ]
# indent after lines ending with { or :
try %[ exec -draft <space> k x <a-k> [:{]$ <ret> j <a-gt> ]
]
]
def -hidden _cabal_indent_on_opening_curly_brace %[
eval -draft -itersel %[
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ exec -draft h <a-F> ) M <a-k> \`\(.*\)\h*\n\h*\{\' <ret> s \`|.\' <ret> 1<a-&> ]
]
]
def -hidden _cabal_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> h m s \`|.\'<ret> 1<a-&> ]
]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group cabal-highlight global WinSetOption filetype=cabal %{ addhl ref cabal }
hook global WinSetOption filetype=cabal %[
hook window InsertEnd .* -group cabal-hooks _cabal_filter_around_selections
hook window InsertChar \n -group cabal-indent _cabal_indent_on_new_line
hook window InsertChar \{ -group cabal-indent _cabal_indent_on_opening_curly_brace
hook window InsertChar \} -group cabal-indent _cabal_indent_on_closing_curly_brace
]
hook -group cabal-highlight global WinSetOption filetype=(?!cabal).* %{ rmhl cabal }
hook global WinSetOption filetype=(?!cabal).* %{
rmhooks window cabal-indent
rmhooks window cabal-hooks
}