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Diffstat (limited to 'runtime/plugin/matchparen.vim')
| -rw-r--r-- | runtime/plugin/matchparen.vim | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/runtime/plugin/matchparen.vim b/runtime/plugin/matchparen.vim new file mode 100644 index 0000000..65b9fe5 --- /dev/null +++ b/runtime/plugin/matchparen.vim @@ -0,0 +1,218 @@ +" Vim plugin for showing matching parens +" Maintainer: Bram Moolenaar <Bram@vim.org> +" Last Change: 2018 Jul 3 + +" 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() + 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. +function! s:Highlight_Matching_Pair() + " Remove any previous match. + if exists('w:paren_hl_on') && w:paren_hl_on + silent! call matchdelete(3) + 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 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. + let s_skip = '!empty(filter(map(synstack(line("."), col(".")), ''synIDattr(v:val, "name")''), ' . + \ '''v:val =~? "string\\|character\\|singlequote\\|escape\\|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 + +" 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 |