| " Vim plugin for showing matching parens |
| " Maintainer: Bram Moolenaar <Bram@vim.org> |
| " 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 |