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694
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1 " Vim plugin for showing matching parens
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2 " Maintainer: Bram Moolenaar <Bram@vim.org>
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702
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3 " Last Change: 2006 Mar 02
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694
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4
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5 " Exit quickly when:
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6 " - this plugin was already loaded (or disabled)
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7 " - when 'compatible' is set
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8 " - the "CursorMoved" autocmd event is not availble.
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9 if exists("g:loaded_matchparen") || &cp || !exists("##CursorMoved")
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10 finish
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11 endif
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12 let g:loaded_matchparen = 1
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13
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14 augroup matchparen
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15 " Replace all matchparen autocommands
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16 autocmd! CursorMoved,CursorMovedI * call s:Highlight_Matching_Pair()
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17 augroup END
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18
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19 let s:paren_hl_on = 0
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20
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21 " Skip the rest if it was already done.
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22 if exists("*s:Highlight_Matching_Pair")
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23 finish
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24 endif
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25
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26 " The function that is invoked (very often) to define a ":match" highlighting
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27 " for any matching paren.
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28 function! s:Highlight_Matching_Pair()
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29 " Remove any previous match.
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30 if s:paren_hl_on
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31 3match none
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32 let s:paren_hl_on = 0
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33 endif
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34
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35 " Get the character under the cursor and check if it's in 'matchpairs'.
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36 let c_lnum = line('.')
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37 let c_col = col('.')
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38 let before = 0
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39
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40 let c = getline(c_lnum)[c_col - 1]
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41 let plist = split(&matchpairs, ':\|,')
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42 let i = index(plist, c)
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43 if i < 0
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44 " not found, in Insert mode try character before the cursor
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45 if c_col > 1 && (mode() == 'i' || mode() == 'R')
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46 let before = 1
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47 let c = getline(c_lnum)[c_col - 2]
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48 let i = index(plist, c)
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49 endif
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50 if i < 0
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51 " not found, nothing to do
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52 return
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53 endif
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54 endif
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55
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56 " Figure out the arguments for searchpairpos().
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57 " Restrict the search to visible lines with "stopline".
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58 if i % 2 == 0
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59 let s_flags = 'nW'
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60 let c2 = plist[i + 1]
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61 let stopline = line('w$')
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62 else
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63 let s_flags = 'nbW'
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64 let c2 = c
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65 let c = plist[i - 1]
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66 let stopline = line('w0')
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67 endif
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68 if c == '['
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69 let c = '\['
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70 let c2 = '\]'
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71 endif
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72
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73 " When not in a string or comment ignore matches inside them.
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74 let s_skip ='synIDattr(synID(c_lnum, c_col - before, 0), "name") ' .
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75 \ '=~? "string\\|comment"'
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76 execute 'if' s_skip '| let s_skip = 0 | endif'
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77
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78 " Find the match. When it was just before the cursor move it there for a
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79 " moment.
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80 if before > 0
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81 let save_cursor = getpos('.')
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82 call cursor(c_lnum, c_col - before)
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83 endif
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84 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)
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85 if before > 0
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86 call cursor(save_cursor)
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87 endif
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88
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89 " If a match is found setup match highlighting.
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90 if m_lnum > 0 && m_lnum >= line('w0') && m_lnum <= line('w$')
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91 exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) .
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92 \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/'
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93 let s:paren_hl_on = 1
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94 endif
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95 endfunction
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96
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97 " Define commands that will disable and enable the plugin.
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98 command! NoMatchParen 3match none | unlet! g:loaded_matchparen | au! matchparen
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99 command! DoMatchParen runtime plugin/matchparen.vim | doau CursorMoved
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