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kakoune/rc/extra/dart.kak

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# https://dartlang.org/
#
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*\.dart %{
set-option buffer filetype dart
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/dart regions
add-highlighter shared/dart/code default-region group
add-highlighter shared/dart/back_string region '`' '`' fill string
add-highlighter shared/dart/double_string region '"' (?<!\\)(\\\\)*" fill string
add-highlighter shared/dart/single_string region "'" (?<!\\)(\\\\)*' fill string
add-highlighter shared/dart/comment region /\* \*/ fill comment
add-highlighter shared/dart/comment_line region '//' $ fill comment
add-highlighter shared/dart/code/ regex %{-?([0-9]*\.(?!0[xX]))?\b([0-9]+|0[xX][0-9a-fA-F]+)\.?([eE][+-]?[0-9]+)?i?\b} 0:value
evaluate-commands %sh{
# Grammar
keywords="abstract|do|import|super|as|in|switch|assert|else|interface|async"
keywords="${keywords}|enum|is|this|export|library|throw|await|external|mixin|break|extends"
keywords="${keywords}|new|try|case|factory|typedef|catch|operator|class|final|part"
keywords="${keywords}|const|finally|rethrow|while|continue|for|return|with|covariant"
keywords="${keywords}|get|set|yield|default|if|static|deferred|implements"
generator_keywords="async\*|sync\*|yield\*"
types="void|bool|num|int|double|dynamic|var"
values="false|true|null"
annotations="@[a-zA-Z]+"
functions="(_?[a-z][a-zA-Z0-9]*)(\(|\w+=>)"
classes="[A-Z][a-zA-Z0-9]*"
# Add the language's grammar to the static completion list
printf %s\\n "hook global WinSetOption filetype=dart %{
set-option window static_words ${keywords} ${attributes} ${types} ${values}
}" | tr '|' ' '
# Highlight keywords
printf %s "
add-highlighter shared/dart/code/ regex \b(${keywords})\b 0:keyword
add-highlighter shared/dart/code/ regex \b(${generator_keywords}) 0:keyword
add-highlighter shared/dart/code/ regex \b(${attributes})\b 0:attribute
add-highlighter shared/dart/code/ regex \b(${types})\b 0:type
add-highlighter shared/dart/code/ regex \b(${values})\b 0:value
add-highlighter shared/dart/code/ regex \b(${functions}) 2:function
add-highlighter shared/dart/code/ regex \b(${annotations})\b 0:meta
add-highlighter shared/dart/code/ regex \b(${classes})\b 0:module
"
}
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden dart-indent-on-new-line %~
evaluate-commands -draft -itersel %=
# preserve previous line indent
try %{ execute-keys -draft \;K<a-&> }
# indent after lines ending with { or (
try %[ execute-keys -draft k<a-x> <a-k> [{(]\h*$ <ret> j<a-gt> ]
# cleanup trailing white spaces on the previous line
try %{ execute-keys -draft k<a-x> s \h+$ <ret>d }
# align to opening paren of previous line
try %{ execute-keys -draft [( <a-k> \A\([^\n]+\n[^\n]*\n?\z <ret> s \A\(\h*.|.\z <ret> '<a-;>' & }
# copy // comments prefix
try %{ execute-keys -draft \;<c-s>k<a-x> s ^\h*\K/{2,} <ret> y<c-o>P<esc> }
# indent after a switch's case/default statements
try %[ execute-keys -draft k<a-x> <a-k> ^\h*(case|default).*:$ <ret> j<a-gt> ]
# indent after if|else|while|for
try %[ execute-keys -draft \;<a-F>)MB <a-k> \A(if|else|while|for)\h*\(.*\)\h*\n\h*\n?\z <ret> s \A|.\z <ret> 1<a-&>1<a-space><a-gt> ]
=
~
define-command -hidden dart-indent-on-opening-curly-brace %[
# align indent with opening paren when { is entered on a new line after the closing paren
try %[ execute-keys -draft -itersel h<a-F>)M <a-k> \A\(.*\)\h*\n\h*\{\z <ret> s \A|.\z <ret> 1<a-&> ]
]
define-command -hidden dart-indent-on-closing-curly-brace %[
# align to opening curly brace when alone on a line
try %[ execute-keys -itersel -draft <a-h><a-k>^\h+\}$<ret>hms\A|.\z<ret>1<a-&> ]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group dart-highlight global WinSetOption filetype=dart %{
add-highlighter window/dart ref dart
hook -once -always window WinSetOption filetype=(?!dart).* %{ remove-highlighter window/dart }
}
hook global WinSetOption filetype=dart %{
# cleanup trailing whitespaces when exiting insert mode
hook window ModeChange insert:.* -group dart-hooks %{ try %{ execute-keys -draft <a-x>s^\h+$<ret>d } }
hook window InsertChar \n -group dart-indent dart-indent-on-new-line
hook window InsertChar \{ -group dart-indent dart-indent-on-opening-curly-brace
hook window InsertChar \} -group dart-indent dart-indent-on-closing-curly-brace
hook -once -always window WinSetOption filetype=(?!dart).* %{ remove-hooks window dart-.+ }
}