" Vim plugin for showing matching parens" Maintainer:  Bram Moolenaar <Bram@vim.org>" Last Change: 2006 Oct 12 " Exit quickly when:" - this plugin was already loaded (or disabled)" - when 'compatible' is set" - the "CursorMoved" autocmd event is not availble.if exists("g:loaded_matchparen") || &cp || !exists("##CursorMoved")  finishendiflet g:loaded_matchparen = 1 augroup matchparen  " Replace all matchparen autocommands  autocmd! CursorMoved,CursorMovedI * call s:Highlight_Matching_Pair()augroup END " Skip the rest if it was already done.if exists("*s:Highlight_Matching_Pair")  finishendif let cpo_save = &cposet cpo-=C " The function that is invoked (very often) to define a ":match" highlighting" for any matching paren.function! s:Highlight_Matching_Pair()  " Remove any previous match.  if exists('w:paren_hl_on') && w:paren_hl_on    3match none    let w:paren_hl_on = 0  endif   " Avoid that we remove the popup menu.  if pumvisible()    return  endif   " Get the character under the cursor and check if it's in 'matchpairs'.  let c_lnum = line('.')  let c_col = col('.')  let before = 0   let c = getline(c_lnum)[c_col - 1]  let plist = split(&matchpairs, '.\zs[:,]')  let i = index(plist, c)  if i < 0    " not found, in Insert mode try character before the cursor    if c_col > 1 && (mode() == 'i' || mode() == 'R')      let before = 1      let c = getline(c_lnum)[c_col - 2]      let i = index(plist, c)    endif    if i < 0      " not found, nothing to do      return    endif  endif   " Figure out the arguments for searchpairpos().  " Restrict the search to visible lines with "stopline".  " And avoid searching very far (e.g., for closed folds and long lines)  if i % 2 == 0    let s_flags = 'nW'    let c2 = plist[i + 1]    if has("byte_offset") && has("syntax_items") && &smc > 0      let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2])      let stopline = min([line('w$'), byte2line(stopbyte)])    else      let stopline = min([line('w$'), c_lnum + 100])    endif  else    let s_flags = 'nbW'    let c2 = c    let c = plist[i - 1]    if has("byte_offset") && has("syntax_items") && &smc > 0      let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2])      let stopline = max([line('w0'), byte2line(stopbyte)])    else      let stopline = max([line('w0'), c_lnum - 100])    endif  endif  if c == '['    let c = '\['    let c2 = '\]'  endif   " Find the match.  When it was just before the cursor move it there for a  " moment.  if before > 0    let save_cursor = winsaveview()    call cursor(c_lnum, c_col - before)  endif   " When not in a string or comment ignore matches inside them.  let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' .	\ '=~?  "string\\|character\\|singlequote\\|comment"'  execute 'if' s_skip '| let s_skip = 0 | endif'   let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)   if before > 0    call winrestview(save_cursor)  endif   " If a match is found setup match highlighting.  if m_lnum > 0 && m_lnum >= line('w0') && m_lnum <= line('w$')    exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) .	  \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/'    let w:paren_hl_on = 1  endifendfunction " Define commands that will disable and enable the plugin.command! NoMatchParen 3match none | unlet! g:loaded_matchparen | au! matchparencommand! DoMatchParen runtime plugin/matchparen.vim | doau CursorMoved let &cpo = cpo_save