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# Detection
# ‾‾‾‾‾‾‾‾‾
hook global BufCreate .*[.](js) %{
set buffer filetype javascript
}
# Highlighters
# ‾‾‾‾‾‾‾‾‾‾‾‾
add-highlighter -group / regions -default code javascript \
double_string '"' (?<!\\)(\\\\)*" '' \
single_string "'" (?<!\\)(\\\\)*' '' \
literal "`" (?<!\\)(\\\\)*` '' \
comment // '$' '' \
comment /\* \*/ ''
# Regular expression flags are: g → global match, i → ignore case, m → multi-lines, y → sticky
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
add-highlighter -group /javascript/double_string fill string
add-highlighter -group /javascript/single_string fill string
add-highlighter -group /javascript/comment fill comment
add-highlighter -group /javascript/literal fill string
add-highlighter -group /javascript/literal regex \${.*?} 0:value
add-highlighter -group /javascript/code regex \$\w* 0:identifier
add-highlighter -group /javascript/code regex \b(document|false|null|parent|self|this|true|undefined|window)\b 0:value
add-highlighter -group /javascript/code regex "-?[0-9]*\.?[0-9]+" 0:value
add-highlighter -group /javascript/code regex \b(Array|Boolean|Date|Function|Number|Object|RegExp|String)\b 0:type
add-highlighter -group /javascript/code regex (?<=\W)/[^\n/]+/[gimy]* 0:meta
# Keywords are collected at
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Lexical_grammar#Keywords
add-highlighter -group /javascript/code regex \b(break|case|catch|class|const|continue|debugger|default|delete|do|else|export|extends|finally|for|function|if|import|in|instanceof|let|new|of|return|super|switch|throw|try|typeof|var|void|while|with|yield)\b 0:keyword
# Commands
# ‾‾‾‾‾‾‾‾
def -hidden javascript-filter-around-selections %{
# remove trailing white spaces
try %{ exec -draft -itersel <a-x> s \h+$ <ret> d }
}
def -hidden javascript-indent-on-char %<
eval -draft -itersel %<
# align closer token to its opener when alone on a line
try %/ exec -draft <a-h> <a-k> ^\h+[]}]$ <ret> m s \`|.\' <ret> 1<a-&> /
>
>
def -hidden javascript-indent-on-new-line %<
eval -draft -itersel %<
# copy // comments prefix and following white spaces
try %{ exec -draft k <a-x> s ^\h*\K#\h* <ret> y gh j P }
# preserve previous line indent
try %{ exec -draft \; K <a-&> }
# filter previous line
try %{ exec -draft k : javascript-filter-around-selections <ret> }
# indent after lines beginning / ending with opener token
try %_ exec -draft k <a-x> <a-k> ^\h*[[{]|[[{]$ <ret> j <a-gt> _
>
>
# Initialization
# ‾‾‾‾‾‾‾‾‾‾‾‾‾‾
hook -group javascript-highlight global WinSetOption filetype=javascript %{ add-highlighter ref javascript }
hook global WinSetOption filetype=javascript %{
hook window InsertEnd .* -group javascript-hooks javascript-filter-around-selections
hook window InsertChar .* -group javascript-indent javascript-indent-on-char
hook window InsertChar \n -group javascript-indent javascript-indent-on-new-line
}
hook -group javascript-highlight global WinSetOption filetype=(?!javascript).* %{ remove-highlighter javascript }
hook global WinSetOption filetype=(?!javascript).* %{
remove-hooks window javascript-indent
remove-hooks window javascript-hooks
}
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