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kakoune/rc/base/javascript.kak

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# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](js)x? %{
set-option buffer filetype javascript
}
hook global BufCreate .*[.](ts)x? %{
set-option buffer filetype typescript
}
# Commands
# ‾‾‾‾‾‾‾‾
define-command -hidden javascript-filter-around-selections %{
# remove trailing white spaces
try %{ execute-keys -draft -itersel <a-x> s \h+$ <ret> d }
}
define-command -hidden javascript-indent-on-char %<
evaluate-commands -draft -itersel %<
# align closer token to its opener when alone on a line
try %/ execute-keys -draft <a-h> <a-k> ^\h+[\]}]$ <ret> m s \A|.\z <ret> 1<a-&> /
>
>
define-command -hidden javascript-indent-on-new-line %<
evaluate-commands -draft -itersel %<
# copy // comments 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 : javascript-filter-around-selections <ret> }
# indent after lines beginning / ending with opener token
try %_ execute-keys -draft k <a-x> <a-k> ^\h*[[{]|[[{]$ <ret> j <a-gt> _
>
>
# Highlighting and hooks bulder for JavaScript and TypeScript
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
define-command -hidden init-javascript-filetype -params 1 %~
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter "shared/%arg{1}" regions
add-highlighter "shared/%arg{1}/code" default-region group
add-highlighter "shared/%arg{1}/double_string" region '"' (?<!\\)(\\\\)*" fill string
add-highlighter "shared/%arg{1}/single_string" region "'" (?<!\\)(\\\\)*' fill string
add-highlighter "shared/%arg{1}/literal" region "`" (?<!\\)(\\\\)*` group
add-highlighter "shared/%arg{1}/comment_line" region // '$' fill comment
add-highlighter "shared/%arg{1}/comment" region /\* \*/ fill comment
add-highlighter "shared/%arg{1}/shebang" region ^#! $ fill meta
add-highlighter "shared/%arg{1}/regex" region / (?<!\\)(\\\\)*/[gimuy]* fill meta
add-highlighter "shared/%arg{1}/jsx" region -recurse (?<![\w<])<[a-zA-Z][\w:.-]* (?<![\w<])<[a-zA-Z][\w:.-]*(?!\hextends)(?=[\s/>])(?!>\()) (</.*?>|/>) regions
add-highlighter "shared/%arg{1}/division" region '[\w\)\]]\K(/|(\h+/\h+))' '(?=\w)' group # Help Kakoune to better detect /…/ literals
# Regular expression flags are: g → global match, i → ignore case, m → multi-lines, u → unicode, y → sticky
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
add-highlighter "shared/%arg{1}/literal/" fill string
add-highlighter "shared/%arg{1}/literal/" regex \$\{.*?\} 0:value
add-highlighter "shared/%arg{1}/code/" regex [^$_]\b(document|false|null|parent|self|this|true|undefined|window)\b 1:value
add-highlighter "shared/%arg{1}/code/" regex "-?\b[0-9]*\.?[0-9]+" 0:value
add-highlighter "shared/%arg{1}/code/" regex \b(Array|Boolean|Date|Function|Number|Object|RegExp|String|Symbol)\b 0:type
# jsx: In well-formed xml the number of opening and closing tags match up regardless of tag name.
#
# We inline a small XML highlighter here since it anyway need to recurse back up to the starting highlighter.
# To make things simple we assume that jsx is always enabled.
add-highlighter "shared/%arg{1}/jsx/tag" region -recurse < <(?=[/a-zA-Z]) (?<!=)> regions
add-highlighter "shared/%arg{1}/jsx/expr" region -recurse \{ \{ \} ref %arg{1}
add-highlighter "shared/%arg{1}/jsx/tag/base" default-region group
add-highlighter "shared/%arg{1}/jsx/tag/double_string" region =\K" (?<!\\)(\\\\)*" fill string
add-highlighter "shared/%arg{1}/jsx/tag/single_string" region =\K' (?<!\\)(\\\\)*' fill string
add-highlighter "shared/%arg{1}/jsx/tag/expr" region -recurse \{ \{ \} group
add-highlighter "shared/%arg{1}/jsx/tag/base/" regex (\w+) 1:attribute
add-highlighter "shared/%arg{1}/jsx/tag/base/" regex </?([\w-$]+) 1:keyword
add-highlighter "shared/%arg{1}/jsx/tag/base/" regex (</?|/?>) 0:meta
add-highlighter "shared/%arg{1}/jsx/tag/expr/" fill default,default+e
add-highlighter "shared/%arg{1}/jsx/tag/expr/" ref %arg{1}
# Keywords are collected at
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords
add-highlighter "shared/%arg{1}/code/" regex \b(async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|export|extends|finally|for|function|if|import|in|instanceof|let|new|of|return|static|super|switch|throw|try|typeof|var|void|while|with|yield)\b 0:keyword
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group "%arg{1}-highlight" global WinSetOption "filetype=%arg{1}" "add-highlighter window/%arg{1} ref %arg{1}"
hook global WinSetOption "filetype=%arg{1}" "
hook window ModeChange insert:.* -group %arg{1}-hooks javascript-filter-around-selections
hook window InsertChar .* -group %arg{1}-indent javascript-indent-on-char
hook window InsertChar \n -group %arg{1}-indent javascript-indent-on-new-line
"
hook -group "%arg{1}-highlight" global WinSetOption "filetype=(?!%arg{1}).*" "remove-highlighter window/%arg{1}"
hook global WinSetOption "filetype=(?!%arg{1}).*" "
remove-hooks window %arg{1}-indent
remove-hooks window %arg{1}-hooks
"
~
init-javascript-filetype javascript
init-javascript-filetype typescript
# Highlighting specific to TypeScript
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter shared/typescript/code/ regex \b(array|boolean|date|number|object|regexp|string|symbol)\b 0:type
# Keywords grabbed from https://github.com/Microsoft/TypeScript/issues/2536
add-highlighter shared/typescript/code/ regex \b(as|constructor|declare|enum|from|implements|interface|module|namespace|package|private|protected|public|readonly|static|type)\b 0:keyword