kakoune/rc/base/go.kak

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# https://golang.org/
#
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*\.go %{
set-option buffer filetype go
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/go regions
add-highlighter shared/go/code default-region group
add-highlighter shared/go/back_string region '`' '`' '' fill string
add-highlighter shared/go/double_string region '"' (?<!\\)(\\\\)*" '' fill string
add-highlighter shared/go/single_string region "'" (?<!\\)(\\\\)*' '' fill string
add-highlighter shared/go/comment region /\* \*/ '' fill comment
add-highlighter shared/go/comment_line region '//' $ '' fill comment
add-highlighter shared/go/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
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keywords="break|default|func|interface|select|case|defer|go|map|struct"
keywords="${keywords}|chan|else|goto|package|switch|const|fallthrough|if|range|type"
keywords="${keywords}|continue|for|import|return|var"
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types="bool|byte|chan|complex128|complex64|error|float32|float64|int|int16|int32"
types="${types}|int64|int8|interface|intptr|map|rune|string|struct|uint|uint16|uint32|uint64|uint8"
values="false|true|nil|iota"
functions="append|cap|close|complex|copy|delete|imag|len|make|new|panic|print|println|real|recover"
# Add the language's grammar to the static completion list
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printf %s\\n "hook global WinSetOption filetype=go %{
set-option window static_words '${keywords} ${attributes} ${types} ${values} ${functions}'
}" | tr '|' ' '
# Highlight keywords
printf %s "
add-highlighter shared/go/code/ regex \b(${keywords})\b 0:keyword
add-highlighter shared/go/code/ regex \b(${attributes})\b 0:attribute
add-highlighter shared/go/code/ regex \b(${types})\b 0:type
add-highlighter shared/go/code/ regex \b(${values})\b 0:value
add-highlighter shared/go/code/ regex \b(${functions})\b 0:builtin
"
}
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden go-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 go-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 go-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+\}$<ret>hms\A|.\z<ret>1<a-&> ]
]
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group go-highlight global WinSetOption filetype=go %{ add-highlighter window/go ref go }
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hook global WinSetOption filetype=go %{
# cleanup trailing whitespaces when exiting insert mode
hook window ModeChange insert:.* -group go-hooks %{ try %{ execute-keys -draft <a-x>s^\h+$<ret>d } }
hook window InsertChar \n -group go-indent go-indent-on-new-line
hook window InsertChar \{ -group go-indent go-indent-on-opening-curly-brace
hook window InsertChar \} -group go-indent go-indent-on-closing-curly-brace
}
hook -group go-highlight global WinSetOption filetype=(?!go).* %{ remove-highlighter window/go }
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hook global WinSetOption filetype=(?!go).* %{
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remove-hooks window go-hooks
remove-hooks window go-indent
}