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matchparen.vim
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" Vim plugin for showing matching parens " Maintainer: Bram Moolenaar <Bram@vim.org> " Last Change: 2021 Apr 08 " Exit quickly when: " - this plugin was already loaded (or disabled) " - when 'compatible' is set " - the "CursorMoved" autocmd event is not available. if exists("g:loaded_matchparen") || &cp || !exists("##CursorMoved") finish endif let g:loaded_matchparen = 1 if !exists("g:matchparen_timeout") let g:matchparen_timeout = 300 endif if !exists("g:matchparen_insert_timeout") let g:matchparen_insert_timeout = 60 endif augroup matchparen " Replace all matchparen autocommands autocmd! CursorMoved,CursorMovedI,WinEnter * call s:Highlight_Matching_Pair() autocmd! WinLeave * call s:Remove_Matches() if exists('##TextChanged') autocmd! TextChanged,TextChangedI * call s:Highlight_Matching_Pair() endif 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. func s:Highlight_Matching_Pair() " Remove any previous match. call s:Remove_Matches() " 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 text = getline(c_lnum) let matches = matchlist(text, '\(.\)\=\%'.c_col.'c\(.\=\)') if empty(matches) let [c_before, c] = ['', ''] else let [c_before, c] = matches[1:2] endif 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 = strlen(c_before) let c = c_before 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 has_getcurpos = exists("*getcurpos") if has_getcurpos " getcurpos() is more efficient but doesn't exist before 7.4.313. let save_cursor = getcurpos() else let save_cursor = winsaveview() endif call cursor(c_lnum, c_col - before) endif if !has("syntax") || !exists("g:syntax_on") let s_skip = "0" else " Build an expression that detects whether the current cursor position is " in certain syntax types (string, comment, etc.), for use as " searchpairpos()'s skip argument. " We match "escape" for special items, such as lispEscapeSpecial, and " match "symbol" for lispBarSymbol. let s_skip = '!empty(filter(map(synstack(line("."), col(".")), ''synIDattr(v:val, "name")''), ' . \ '''v:val =~? "string\\|character\\|singlequote\\|escape\\|symbol\\|comment"''))' " If executing the expression determines that the cursor is currently in " one of the syntax types, then we want searchpairpos() to find the pair " within those syntax types (i.e., not skip). Otherwise, the cursor is " outside of the syntax types and s_skip should keep its value so we skip " any matching pair inside the syntax types. " Catch if this throws E363: pattern uses more memory than 'maxmempattern'. try execute 'if ' . s_skip . ' | let s_skip = "0" | endif' catch /^Vim\%((\a\+)\)\=:E363/ " We won't find anything, so skip searching, should keep Vim responsive. return endtry endif " Limit the search to lines visible in the window. let stoplinebottom = line('w$') let stoplinetop = line('w0') if i % 2 == 0 let stopline = stoplinebottom else let stopline = stoplinetop endif " Limit the search time to 300 msec to avoid a hang on very long lines. " This fails when a timeout is not supported. if mode() == 'i' || mode() == 'R' let timeout = exists("b:matchparen_insert_timeout") ? b:matchparen_insert_timeout : g:matchparen_insert_timeout else let timeout = exists("b:matchparen_timeout") ? b:matchparen_timeout : g:matchparen_timeout endif try let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, timeout) catch /E118/ " Can't use the timeout, restrict the stopline a bit more to avoid taking " a long time on closed folds and long lines. " The "viewable" variables give a range in which we can scroll while " keeping the cursor at the same position. " adjustedScrolloff accounts for very large numbers of scrolloff. let adjustedScrolloff = min([&scrolloff, (line('w$') - 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 if has_getcurpos call setpos('.', save_cursor) else call winrestview(save_cursor) endif endif " If a match is found setup match highlighting. if m_lnum > 0 && m_lnum >= stoplinetop && m_lnum <= stoplinebottom if exists('*matchaddpos') call matchaddpos('MatchParen', [[c_lnum, c_col - before], [m_lnum, m_col]], 10, 3) else exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) . \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/' endif let w:paren_hl_on = 1 endif endfunction func s:Remove_Matches() if exists('w:paren_hl_on') && w:paren_hl_on silent! call matchdelete(3) let w:paren_hl_on = 0 endif endfunc " Define commands that will disable and enable the plugin. command DoMatchParen call s:DoMatchParen() command NoMatchParen call s:NoMatchParen() func s:NoMatchParen() let w = winnr() noau windo silent! call matchdelete(3) unlet! g:loaded_matchparen exe "noau ". w . "wincmd w" au! matchparen endfunc func s:DoMatchParen() runtime plugin/matchparen.vim let w = winnr() silent windo doau CursorMoved exe "noau ". w . "wincmd w" endfunc let &cpo = s:cpo_save unlet s:cpo_save