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190 lines
6.2 KiB
VimL
190 lines
6.2 KiB
VimL
" Vim plugin for showing matching parens
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" Maintainer: Bram Moolenaar <Bram@vim.org>
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" Last Change: 2014 Jul 19
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" Exit quickly when:
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" - this plugin was already loaded (or disabled)
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" - when 'compatible' is set
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" - the "CursorMoved" autocmd event is not available.
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if exists("g:loaded_matchparen") || &cp || !exists("##CursorMoved")
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finish
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endif
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let g:loaded_matchparen = 1
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if !exists("g:matchparen_timeout")
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let g:matchparen_timeout = 300
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endif
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if !exists("g:matchparen_insert_timeout")
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let g:matchparen_insert_timeout = 60
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endif
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augroup matchparen
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" Replace all matchparen autocommands
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autocmd! CursorMoved,CursorMovedI,WinEnter * call s:Highlight_Matching_Pair()
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if exists('##TextChanged')
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autocmd! TextChanged,TextChangedI * call s:Highlight_Matching_Pair()
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endif
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augroup END
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" Skip the rest if it was already done.
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if exists("*s:Highlight_Matching_Pair")
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finish
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endif
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let s:cpo_save = &cpo
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set cpo-=C
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" The function that is invoked (very often) to define a ":match" highlighting
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" for any matching paren.
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function! s:Highlight_Matching_Pair()
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" Remove any previous match.
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if exists('w:paren_hl_on') && w:paren_hl_on
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silent! call matchdelete(3)
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let w:paren_hl_on = 0
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endif
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" Avoid that we remove the popup menu.
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" Return when there are no colors (looks like the cursor jumps).
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if pumvisible() || (&t_Co < 8 && !has("gui_running"))
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return
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endif
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" Get the character under the cursor and check if it's in 'matchpairs'.
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let c_lnum = line('.')
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let c_col = col('.')
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let before = 0
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let text = getline(c_lnum)
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let c = text[c_col - 1]
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let plist = split(&matchpairs, '.\zs[:,]')
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let i = index(plist, c)
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if i < 0
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" not found, in Insert mode try character before the cursor
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if c_col > 1 && (mode() == 'i' || mode() == 'R')
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let before = 1
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let c = text[c_col - 2]
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let i = index(plist, c)
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endif
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if i < 0
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" not found, nothing to do
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return
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endif
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endif
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" Figure out the arguments for searchpairpos().
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if i % 2 == 0
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let s_flags = 'nW'
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let c2 = plist[i + 1]
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else
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let s_flags = 'nbW'
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let c2 = c
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let c = plist[i - 1]
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endif
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if c == '['
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let c = '\['
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let c2 = '\]'
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endif
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" Find the match. When it was just before the cursor move it there for a
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" moment.
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if before > 0
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let has_getcurpos = exists("*getcurpos")
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if has_getcurpos
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" getcurpos() is more efficient but doesn't exist before 7.4.313.
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let save_cursor = getcurpos()
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else
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let save_cursor = winsaveview()
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endif
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call cursor(c_lnum, c_col - before)
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endif
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" Build an expression that detects whether the current cursor position is in
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" certain syntax types (string, comment, etc.), for use as searchpairpos()'s
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" skip argument.
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" We match "escape" for special items, such as lispEscapeSpecial.
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let s_skip = '!empty(filter(map(synstack(line("."), col(".")), ''synIDattr(v:val, "name")''), ' .
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\ '''v:val =~? "string\\|character\\|singlequote\\|escape\\|comment"''))'
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" If executing the expression determines that the cursor is currently in
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" one of the syntax types, then we want searchpairpos() to find the pair
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" within those syntax types (i.e., not skip). Otherwise, the cursor is
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" outside of the syntax types and s_skip should keep its value so we skip any
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" matching pair inside the syntax types.
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execute 'if' s_skip '| let s_skip = 0 | endif'
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" Limit the search to lines visible in the window.
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let stoplinebottom = line('w$')
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let stoplinetop = line('w0')
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if i % 2 == 0
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let stopline = stoplinebottom
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else
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let stopline = stoplinetop
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endif
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" Limit the search time to 300 msec to avoid a hang on very long lines.
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" This fails when a timeout is not supported.
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if mode() == 'i' || mode() == 'R'
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let timeout = exists("b:matchparen_insert_timeout") ? b:matchparen_insert_timeout : g:matchparen_insert_timeout
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else
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let timeout = exists("b:matchparen_timeout") ? b:matchparen_timeout : g:matchparen_timeout
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endif
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try
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let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, timeout)
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catch /E118/
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" Can't use the timeout, restrict the stopline a bit more to avoid taking
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" a long time on closed folds and long lines.
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" The "viewable" variables give a range in which we can scroll while
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" keeping the cursor at the same position.
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" adjustedScrolloff accounts for very large numbers of scrolloff.
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let adjustedScrolloff = min([&scrolloff, (line('w$') - line('w0')) / 2])
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let bottom_viewable = min([line('$'), c_lnum + &lines - adjustedScrolloff - 2])
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let top_viewable = max([1, c_lnum-&lines+adjustedScrolloff + 2])
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" one of these stoplines will be adjusted below, but the current values are
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" minimal boundaries within the current window
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if i % 2 == 0
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if has("byte_offset") && has("syntax_items") && &smc > 0
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let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2])
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let stopline = min([bottom_viewable, byte2line(stopbyte)])
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else
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let stopline = min([bottom_viewable, c_lnum + 100])
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endif
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let stoplinebottom = stopline
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else
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if has("byte_offset") && has("syntax_items") && &smc > 0
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let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2])
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let stopline = max([top_viewable, byte2line(stopbyte)])
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else
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let stopline = max([top_viewable, c_lnum - 100])
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endif
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let stoplinetop = stopline
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endif
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let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)
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endtry
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if before > 0
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if has_getcurpos
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call setpos('.', save_cursor)
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else
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call winrestview(save_cursor)
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endif
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endif
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" If a match is found setup match highlighting.
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if m_lnum > 0 && m_lnum >= stoplinetop && m_lnum <= stoplinebottom
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if exists('*matchaddpos')
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call matchaddpos('MatchParen', [[c_lnum, c_col - before], [m_lnum, m_col]], 10, 3)
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else
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exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) .
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\ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/'
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endif
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let w:paren_hl_on = 1
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endif
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endfunction
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" Define commands that will disable and enable the plugin.
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command! NoMatchParen windo silent! call matchdelete(3) | unlet! g:loaded_matchparen |
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\ au! matchparen
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command! DoMatchParen runtime plugin/matchparen.vim | windo doau CursorMoved
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let &cpo = s:cpo_save
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unlet s:cpo_save
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