" Vim plugin for showing matching parens " Maintainer: Bram Moolenaar " Last Change: 2011 Aug 27 " 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") finish endif let g:loaded_matchparen = 1 augroup matchparen " Replace all matchparen autocommands autocmd! CursorMoved,CursorMovedI,WinEnter * call s:Highlight_Matching_Pair() augroup END " Skip the rest if it was already done. if exists("*s:Highlight_Matching_Pair") finish endif let s:cpo_save = &cpo set 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. " Return when there are no colors (looks like the cursor jumps). if pumvisible() || (&t_Co < 8 && !has("gui_running")) 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(). if i % 2 == 0 let s_flags = 'nW' let c2 = plist[i + 1] else let s_flags = 'nbW' let c2 = c let c = plist[i - 1] 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. " We match "escape" for special items, such as lispEscapeSpecial. let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' . \ '=~? "string\\|character\\|singlequote\\|escape\\|comment"' execute 'if' s_skip '| let s_skip = 0 | endif' " Limit the search to lines visible in the window. let stoplinebottom = line('w$') let stoplinetop = line('w0') if i % 2 == 0 let stopline = stoplinebottom else let stopline = stoplinetop endif try " Limit the search time to 300 msec to avoid a hang on very long lines. " This fails when a timeout is not supported. let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, 300) catch /E118/ " Can't use the timeout, restrict the stopline a bit more to avoid taking " a long time on closed folds and long lines. " The "viewable" variables give a range in which we can scroll while " keeping the cursor at the same position. " adjustedScrolloff accounts for very large numbers of scrolloff. let adjustedScrolloff = min([&scrolloff, (line('w$') - line('w0')) / 2]) let bottom_viewable = min([line('$'), c_lnum + &lines - adjustedScrolloff - 2]) let top_viewable = max([1, c_lnum-&lines+adjustedScrolloff + 2]) " one of these stoplines will be adjusted below, but the current values are " minimal boundaries within the current window if i % 2 == 0 if has("byte_offset") && has("syntax_items") && &smc > 0 let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2]) let stopline = min([bottom_viewable, byte2line(stopbyte)]) else let stopline = min([bottom_viewable, c_lnum + 100]) endif let stoplinebottom = stopline else if has("byte_offset") && has("syntax_items") && &smc > 0 let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2]) let stopline = max([top_viewable, byte2line(stopbyte)]) else let stopline = max([top_viewable, c_lnum - 100]) endif let stoplinetop = stopline endif let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline) endtry if before > 0 call winrestview(save_cursor) endif " If a match is found setup match highlighting. if m_lnum > 0 && m_lnum >= stoplinetop && m_lnum <= stoplinebottom exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) . \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/' let w:paren_hl_on = 1 endif endfunction " Define commands that will disable and enable the plugin. command! NoMatchParen windo 3match none | unlet! g:loaded_matchparen | \ au! matchparen command! DoMatchParen runtime plugin/matchparen.vim | windo doau CursorMoved let &cpo = s:cpo_save unlet s:cpo_save