vimtex/ftplugin/latextoc.vim

" LaTeX plugin for Vim
"
" Maintainer: Karl Yngve Lervåg
" Email:      karl.yngve@gmail.com
"

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

" Set local buffer settings
setlocal buftype=nofile
setlocal bufhidden=wipe
setlocal nobuflisted
setlocal noswapfile
setlocal nowrap
setlocal nonumber
setlocal nolist
setlocal nospell
setlocal cursorline
setlocal tabstop=8
setlocal cole=0
setlocal cocu=nvic
if g:latex_toc_fold
    setlocal foldmethod=expr
    setlocal foldexpr=toc#fold(v:lnum)
    setlocal foldtext=toc#fold_tex()
endif

" Define mappings
nnoremap <buffer> <silent> G G4k
nnoremap <buffer> <silent> <Esc>OA k
nnoremap <buffer> <silent> <Esc>OB j
nnoremap <buffer> <silent> <Esc>OC l
nnoremap <buffer> <silent> <Esc>OD h
nnoremap <buffer> <silent> s             :call <SID>toc_toggle_numbers()<cr>
nnoremap <buffer> <silent> q             :call <SID>toc_close()<cr>
nnoremap <buffer> <silent> <Esc>         :call <SID>toc_close()<cr>
nnoremap <buffer> <silent> <Space>       :call <SID>toc_activate(0)<cr>
nnoremap <buffer> <silent> <leftrelease> :call <SID>toc_activate(0)<cr>
nnoremap <buffer> <silent> <CR>          :call <SID>toc_activate(1)<cr>
nnoremap <buffer> <silent> <2-leftmouse> :call <SID>toc_activate(1)<cr>

" {{{1 s:toc_activate
function! s:toc_activate(close)
    let n = getpos('.')[1] - 1

    if n >= len(b:toc)
        return
    endif

    let entry = b:toc[n]

    let titlestr = s:toc_escape_title(entry['text'])

    " Search for duplicates
    "
    let i=0
    let entry_hash = entry['level'].titlestr
    let duplicates = 0
    while i<n
        let i_entry = b:toc[n]
        let i_hash = b:toc[i]['level'].s:toc_escape_title(b:toc[i]['text'])
        if i_hash == entry_hash
            let duplicates += 1
        endif
        let i += 1
    endwhile
    let toc_bnr = bufnr('%')
    let toc_wnr = winnr()

    execute b:calling_win . 'wincmd w'

    let bnr = bufnr(entry['file'])
    if bnr == -1
        execute 'badd ' . entry['file']
        let bnr = bufnr(entry['file'])
    endif

    execute 'buffer! ' . bnr

    " skip duplicates
    while duplicates > 0
        if search('\\' . entry['level'] . '\_\s*{' . titlestr . '}', 'ws')
            let duplicates -= 1
        endif
    endwhile

    if search('\\' . entry['level'] . '\_\s*{' . titlestr . '}', 'ws')
        normal! zv
    endif

    if a:close
        if g:latex_toc_resize
            silent exe "set columns-=" . g:latex_toc_width
        endif
        execute 'bwipeout ' . toc_bnr
    else
        execute toc_wnr . 'wincmd w'
    endif
endfunction

" {{{1 s:toc_close
function! s:toc_close()
    if g:latex_toc_resize
        silent exe "set columns-=" . g:latex_toc_width
    endif
    bwipeout
endfunction

" {{{1 s:toc_escape_title
function! s:toc_escape_title(titlestr)
    " Credit goes to Marcin Szamotulski for the following fix.  It allows to
    " match through commands added by TeX.

    let titlestr = substitute(a:titlestr, '\\\w*\>\s*\%({[^}]*}\)\?', '.*', 'g')
    let titlestr = escape(titlestr, '\')
    return substitute(titlestr, ' ', '\\_\\s\\+', 'g')
endfunction

" {{{1 s:toc_toggle_numbers
function! s:toc_toggle_numbers()
    if b:toc_numbers
        setlocal conceallevel=3
        let b:toc_numbers = 0
    else
        setlocal conceallevel=0
        let b:toc_numbers = 1
    endif
endfunction
" }}}1

" vim:fdm=marker:ff=unix