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kakoune/rc/filetype/protobuf.kak
2024-01-16 14:58:31 -06:00

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# https://developers.google.com/protocol-buffers/
# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*\.proto$ %{
set-option buffer filetype protobuf
}
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook global WinSetOption filetype=protobuf %[
require-module protobuf
set-option window static_words %opt{protobuf_static_words}
hook window ModeChange pop:insert:.* -group protobuf-trim-indent protobuf-trim-indent
hook -group protobuf-insert window InsertChar \n protobuf-insert-on-newline
hook -group protobuf-indent window InsertChar \n protobuf-indent-on-newline
hook -group protobuf-indent window InsertChar \{ protobuf-indent-on-opening-curly-brace
hook -group protobuf-indent window InsertChar \} protobuf-indent-on-closing-curly-brace
hook -once -always window WinSetOption filetype=.* %{ remove-hooks window protobuf-.+ }
]
hook -group protobuf-highlight global WinSetOption filetype=protobuf %{
add-highlighter window/protobuf ref protobuf
hook -once -always window WinSetOption filetype=.* %{ remove-highlighter window/protobuf }
}
provide-module protobuf %[
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/protobuf regions
add-highlighter shared/protobuf/code default-region group
add-highlighter shared/protobuf/double_string region '"' (?<!\\)(\\\\)*" fill string
add-highlighter shared/protobuf/comment region /\* \*/ fill comment
add-highlighter shared/protobuf/comment_line region '//' $ fill comment
add-highlighter shared/protobuf/code/ regex %{(0x)?[0-9]+\b} 0:value
evaluate-commands %sh{
# Grammer
keywords='default deprecated enum extend import message oneof option
package service syntax'
attributes='optional repeated required'
types='double float int32 int64 uint32 uint64 sint32 sint64 fixed32 fixed64
sfixed32 sfixed64 bool string bytes rpc'
values='false true'
join() { sep=$2; eval set -- $1; IFS="$sep"; echo "$*"; }
# Add the language's grammer to the static completion list
printf %s\\n "declare-option str-list protobuf_static_words $(join "${keywords} ${attributes} ${types} ${values}" ' ')"
# Highlight keywords
printf %s "
add-highlighter shared/protobuf/code/keywords regex \b($(join "${keywords}" '|'))\b 0:keyword
add-highlighter shared/protobuf/code/attributes regex \b($(join "${attributes}" '|'))\b 0:attribute
add-highlighter shared/protobuf/code/types regex \b($(join "${types}" '|'))\b 0:type
add-highlighter shared/protobuf/code/values regex \b($(join "${values}" '|'))\b 0:value
"
}
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden protobuf-trim-indent %{
evaluate-commands -no-hooks -draft -itersel %{
execute-keys x
# remove trailing white spaces
try %{ execute-keys -draft s \h + $ <ret> d }
}
}
define-command -hidden protobuf-insert-on-newline %{
evaluate-commands -draft -itersel %[
# copy // comments prefix
try %{ execute-keys -draft <semicolon><c-s>kx s ^\h*\K/{2,}(\h*(?=\S))? <ret> y<c-o>P<esc> }
]
}
define-command -hidden protobuf-indent-on-newline %~
evaluate-commands -draft -itersel %[
# preserve previous line indent
try %{ execute-keys -draft <semicolon>K<a-&> }
# indent after lines ending with {
try %[ execute-keys -draft kx <a-k> \{\h*$ <ret> j<a-gt> ]
# cleanup trailing white spaces on the previous line
try %{ execute-keys -draft kx s \h+$ <ret>d }
# deindent closing brace(s) when after cursor
try %[ execute-keys -draft x <a-k> ^\h*\} <ret> gh / \} <ret> m <a-S> 1<a-&> ]
]
~
define-command -hidden protobuf-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 protobuf-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-&> ]
]
]