" Vim filetype plugin file
" Language:           ConTeXt typesetting engine
" Maintainer:         Nicola Vitacolonna <nvitacolonna@gmail.com>
" Former Maintainers: Nikolai Weibull <now@bitwi.se>
" Latest Revision:    2021 Oct 15

if exists("b:did_ftplugin")
  finish
endif
let b:did_ftplugin = 1

let s:cpo_save = &cpo
set cpo&vim

if !exists('current_compiler')
  compiler context
endif

let b:undo_ftplugin = "setl com< cms< def< inc< sua< fo< ofu<"

setlocal comments=b:%D,b:%C,b:%M,:% commentstring=%\ %s formatoptions+=tjcroql2
if get(b:, 'context_metapost', get(g:, 'context_metapost', 1))
  setlocal omnifunc=contextcomplete#Complete
  let g:omni_syntax_group_include_context = 'mf\w\+,mp\w\+'
  let g:omni_syntax_group_exclude_context = 'mfTodoComment'
endif

let &l:define='\\\%([egx]\|char\|mathchar\|count\|dimen\|muskip\|skip\|toks\)\='
        \ .     'def\|\\font\|\\\%(future\)\=let'
        \ . '\|\\new\%(count\|dimen\|skip\|muskip\|box\|toks\|read\|write'
        \ .     '\|fam\|insert\|if\)'

let &l:include = '^\s*\\\%(input\|component\|product\|project\|environment\)'

setlocal suffixesadd=.tex

if exists("loaded_matchit") && !exists("b:match_words")
  let b:match_ignorecase = 0
  let b:match_skip = 'r:\\\@<!\%(\\\\\)*%'
  let b:match_words = '(:),\[:],{:},\\(:\\),\\\[:\\],' .
        \ '\\start\(\a\+\):\\stop\1'
  let b:undo_ftplugin .= " | unlet! b:match_ignorecase b:match_words b:match_skip"
endif

let s:context_regex = {
      \ 'beginsection' : '\\\%(start\)\=\%(\%(sub\)*section\|\%(sub\)*subject\|chapter\|part\|component\|product\|title\)\>',
      \ 'endsection'   : '\\\%(stop\)\=\%(\%(sub\)*section\|\%(sub\)*subject\|chapter\|part\|component\|product\|title\)\>',
      \ 'beginblock'   : '\\\%(start\|setup\|define\)',
      \ 'endblock'     : '\\\%(stop\|setup\|define\)'
      \ }

function! s:move_around(count, what, flags, visual)
  if a:visual
    exe "normal! gv"
  endif
  call search(s:context_regex[a:what], a:flags.'s') " 's' sets previous context mark
  call map(range(2, a:count), 'search(s:context_regex[a:what], a:flags)')
endfunction

if !exists("no_plugin_maps") && !exists("no_context_maps")
  " Move around macros.
  nnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:false) <CR>
  vnoremap <silent><buffer> [[ :<C-U>call <SID>move_around(v:count1, "beginsection", "bW", v:true)  <CR>
  nnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:false) <CR>
  vnoremap <silent><buffer> ]] :<C-U>call <SID>move_around(v:count1, "beginsection", "W",  v:true)  <CR>
  nnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:false) <CR>
  vnoremap <silent><buffer> [] :<C-U>call <SID>move_around(v:count1, "endsection",   "bW", v:true)  <CR>
  nnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:false) <CR>
  vnoremap <silent><buffer> ][ :<C-U>call <SID>move_around(v:count1, "endsection",   "W",  v:true)  <CR>
  nnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:false) <CR>
  vnoremap <silent><buffer> [{ :<C-U>call <SID>move_around(v:count1, "beginblock",   "bW", v:true)  <CR>
  nnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:false) <CR>
  vnoremap <silent><buffer> ]} :<C-U>call <SID>move_around(v:count1, "endblock",     "W",  v:true)  <CR>

  let b:undo_ftplugin .= " | sil! exe 'nunmap <buffer> [[' | sil! exe 'vunmap <buffer> [['" .
	\                " | sil! exe 'nunmap <buffer> ]]' | sil! exe 'vunmap <buffer> ]]'" .
	\                " | sil! exe 'nunmap <buffer> []' | sil! exe 'vunmap <buffer> []'" .
	\                " | sil! exe 'nunmap <buffer> ][' | sil! exe 'vunmap <buffer> ]['" .
	\                " | sil! exe 'nunmap <buffer> [{' | sil! exe 'vunmap <buffer> [{'" .
	\                " | sil! exe 'nunmap <buffer> ]}' | sil! exe 'vunmap <buffer> ]}'"
end

" Other useful mappings
if get(g:, 'context_mappings', 1)
  let s:tp_regex = '?^$\|^\s*\\\(item\|start\|stop\|blank\|\%(sub\)*section\|chapter\|\%(sub\)*subject\|title\|part\)'

  fun! s:tp()
    call cursor(search(s:tp_regex, 'bcW') + 1, 1)
    normal! V
    call cursor(search(s:tp_regex, 'W') - 1, 1)
  endf

  if !exists("no_plugin_maps") && !exists("no_context_maps")
    " Reflow paragraphs with commands like gqtp ("gq TeX paragraph")
    onoremap <silent><buffer> tp :<c-u>call <sid>tp()<cr>
    " Select TeX paragraph
    vnoremap <silent><buffer> tp <esc>:<c-u>call <sid>tp()<cr>

    " $...$ text object
    onoremap <silent><buffer> i$ :<c-u>normal! T$vt$<cr>
    onoremap <silent><buffer> a$ :<c-u>normal! F$vf$<cr>
    vnoremap <buffer> i$ T$ot$
    vnoremap <buffer> a$ F$of$

    let b:undo_ftplugin .= " | sil! exe 'ounmap <buffer> tp' | sil! exe 'vunmap <buffer> tp'" .
	  \                " | sil! exe 'ounmap <buffer> i$' | sil! exe 'vunmap <buffer> i$'" .
	  \                " | sil! exe 'ounmap <buffer> a$' | sil! exe 'vunmap <buffer> a$'"
    endif
endif

" Commands for asynchronous typesetting
command! -buffer -nargs=? -complete=file ConTeXt          call context#typeset(<q-args>)
command!         -nargs=0                ConTeXtJobStatus call context#job_status()
command!         -nargs=0                ConTeXtStopJobs  call context#stop_jobs()

let &cpo = s:cpo_save
unlet s:cpo_save