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" Autoload functions for after/ftplugin/markdown/autoformat.vim
" Suspend auto-format when pasting anything with a linebreak
function! ftplugin#markdown#autoformat#Line() abort
if getline('.') =~# '\m^ '
if &formatoptions =~# '\ma'
setlocal formatoptions-=a
let b:markdown_autoformat_suspended = 1
endif
elseif exists('b:markdown_autoformat_suspended')
setlocal formatoptions+=a
unlet b:markdown_autoformat_suspended
endif
endfunction
" Turn on autoformatting if less than 5% of the buffer's lines meet all three
" of these conditions:
" * Longer than 'textwidth'
" * Contains at least one space (not an unsplittable line)
" * Not a code block (indented with at least four spaces)
function! ftplugin#markdown#autoformat#Load() abort
let l:width = &textwidth ? &textwidth : 79
let l:count = 0
let l:total = line('$')
for l:li in range(1, l:total)
let l:line = getline(l:li)
if strlen(l:line) > l:width
\ && stridx(l:line, ' ') > -1
\ && l:line !~# '\m^ '
let l:count = l:count + 1
endif
endfor
if l:count * 100 / l:total < 5
setlocal formatoptions+=a
else
setlocal formatoptions-=a
endif
endfunction
" Suspend auto-formatting when in a code block (four-space indent)
function! ftplugin#markdown#autoformat#Put(above) abort
let l:suspended = 0
if &formatoptions =~# '\ma' && @" =~# '\m\n'
setlocal formatoptions-=a
let l:suspended = 1
endif
if a:above
normal! P
else
normal! p
endif
if l:suspended
setlocal formatoptions+=a
endif
endfunction
" Wrapper functions for #Put() above/below
function! ftplugin#markdown#autoformat#PutAbove() abort
call ftplugin#markdown#autoformat#Put(1)
endfunction
function! ftplugin#markdown#autoformat#PutBelow() abort
call ftplugin#markdown#autoformat#Put(0)
endfunction
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