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" Vim plugin for showing matching parens
" Maintainer: Bram Moolenaar <Bram@vim.org>
" Last Change: 2006 Sep 09
" 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 * call s:Highlight_Matching_Pair()
augroup END
" Skip the rest if it was already done.
if exists("*s:Highlight_Matching_Pair")
finish
endif
let 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.
if pumvisible()
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().
" Restrict the search to visible lines with "stopline".
" And avoid searching very far (e.g., for closed folds and long lines)
if i % 2 == 0
let s_flags = 'nW'
let c2 = plist[i + 1]
if has("byte_offset") && has("syntax_items") && &smc > 0
let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2])
let stopline = min([line('w$'), byte2line(stopbyte)])
else
let stopline = min([line('w$'), c_lnum + 100])
endif
else
let s_flags = 'nbW'
let c2 = c
let c = plist[i - 1]
if has("byte_offset") && has("syntax_items") && &smc > 0
let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2])
let stopline = max([line('w0'), byte2line(stopbyte)])
else
let stopline = max([line('w0'), c_lnum - 100])
endif
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'
let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)
if before > 0
call winrestview(save_cursor)
endif
" If a match is found setup match highlighting.
if m_lnum > 0 && m_lnum >= line('w0') && m_lnum <= line('w$')
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 3match none | unlet! g:loaded_matchparen | au! matchparen
command! DoMatchParen runtime plugin/matchparen.vim | doau CursorMoved
let &cpo = cpo_save
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