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" Vim plugin for showing matching parens
" Maintainer: Bram Moolenaar <Bram@vim.org>
" Last Change: 2008 Sep 03
" 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.
let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' .
\ '=~? "string\\|character\\|singlequote\\|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
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