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vim9script
# Maintainer: Maxim Kim <habamax@gmail.com>
# Last Update: 2024-04-26
#
# Toggle comments
# Usage:
# Add following mappings to vimrc:
# import autoload 'dist/comment.vim'
# nnoremap <silent> <expr> gc comment.Toggle()
# xnoremap <silent> <expr> gc comment.Toggle()
# nnoremap <silent> <expr> gcc comment.Toggle() .. '_'
export def Toggle(...args: list<string>): string
if len(args) == 0
&opfunc = matchstr(expand('<stack>'), '[^. ]*\ze[')
return 'g@'
endif
if empty(&cms) || !&ma | return '' | endif
var cms = substitute(substitute(&cms, '\S\zs%s\s*', ' %s', ''), '%s\ze\S', '%s ', '')
var [lnum1, lnum2] = [line("'["), line("']")]
var cms_l = split(escape(cms, '*.'), '\s*%s\s*')
if len(cms_l) == 0 | return '' | endif
if len(cms_l) == 1 | call add(cms_l, '') | endif
var comment = 0
var indent_min = indent(lnum1)
var indent_start = matchstr(getline(lnum1), '^\s*')
for lnum in range(lnum1, lnum2)
if getline(lnum) =~ '^\s*$' | continue | endif
if indent_min > indent(lnum)
indent_min = indent(lnum)
indent_start = matchstr(getline(lnum), '^\s*')
endif
if getline(lnum) !~ $'^\s*{cms_l[0]}.*{cms_l[1]}$'
comment = 1
endif
endfor
var lines = []
var line = ''
for lnum in range(lnum1, lnum2)
if getline(lnum) =~ '^\s*$'
line = getline(lnum)
elseif comment
if exists("g:comment_first_col") || exists("b:comment_first_col")
# handle % with substitute
line = printf(substitute(cms, '%s\@!', '%%', 'g'), getline(lnum))
else
# handle % with substitute
line = printf(indent_start .. substitute(cms, '%s\@!', '%%', 'g'),
strpart(getline(lnum), strlen(indent_start)))
endif
else
line = substitute(getline(lnum), $'^\s*\zs{cms_l[0]} \?\| \?{cms_l[1]}$', '', 'g')
endif
add(lines, line)
endfor
noautocmd keepjumps setline(lnum1, lines)
return ''
enddef
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