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kakoune/rc/extra/cabal.kak
2018-09-19 19:59:57 +02:00

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# http://haskell.org/cabal
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](cabal) %{
set-option buffer filetype cabal
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/cabal regions
add-highlighter shared/cabal/code default-region group
add-highlighter shared/cabal/line_comment region (--) $ fill comment
add-highlighter shared/cabal/comment region -recurse \{- \{- -\} fill comment
add-highlighter shared/cabal/code/ regex \b(true|false)\b|(([<>]?=?)?\d+(\.\d+)+) 0:value
add-highlighter shared/cabal/code/ regex \b(if|else)\b 0:keyword
add-highlighter shared/cabal/code/ regex ^\h*([A-Za-z][A-Za-z0-9_-]*)\h*: 1:variable
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden cabal-filter-around-selections %{
# remove trailing white spaces
try %{ execute-keys -draft -itersel <a-x> s \h+$ <ret> d }
}
define-command -hidden cabal-indent-on-new-line %[
evaluate-commands -draft -itersel %[
# copy '#' comment 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 : cabal-filter-around-selections <ret> ]
# indent after lines ending with { or :
try %[ execute-keys -draft <space> k <a-x> <a-k> [:{]$ <ret> j <a-gt> ]
]
]
define-command -hidden cabal-indent-on-opening-curly-brace %[
evaluate-commands -draft -itersel %[
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ execute-keys -draft h <a-F> ) M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
]
]
define-command -hidden cabal-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> h m s \A|.\z<ret> 1<a-&> ]
]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group cabal-highlight global WinSetOption filetype=cabal %{ add-highlighter window/cabal ref cabal }
hook global WinSetOption filetype=cabal %[
hook window ModeChange insert:.* -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).* %{ remove-highlighter window/cabal }
hook global WinSetOption filetype=(?!cabal).* %{
remove-hooks window cabal-.+
}