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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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3082
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3 " Last Change: 2011 Aug 27
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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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1368
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16 autocmd! CursorMoved,CursorMovedI,WinEnter * call s:Highlight_Matching_Pair()
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694
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17 augroup END
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18
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19 " Skip the rest if it was already done.
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20 if exists("*s:Highlight_Matching_Pair")
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21 finish
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22 endif
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23
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2034
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24 let s:cpo_save = &cpo
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757
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25 set cpo-=C
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26
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694
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27 " The function that is invoked (very often) to define a ":match" highlighting
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28 " for any matching paren.
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29 function! s:Highlight_Matching_Pair()
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30 " Remove any previous match.
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819
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31 if exists('w:paren_hl_on') && w:paren_hl_on
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698
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32 3match none
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819
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33 let w:paren_hl_on = 0
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694
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34 endif
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35
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711
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36 " Avoid that we remove the popup menu.
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1556
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37 " Return when there are no colors (looks like the cursor jumps).
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38 if pumvisible() || (&t_Co < 8 && !has("gui_running"))
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711
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39 return
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40 endif
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41
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694
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42 " Get the character under the cursor and check if it's in 'matchpairs'.
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43 let c_lnum = line('.')
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44 let c_col = col('.')
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45 let before = 0
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46
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47 let c = getline(c_lnum)[c_col - 1]
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967
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48 let plist = split(&matchpairs, '.\zs[:,]')
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694
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49 let i = index(plist, c)
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50 if i < 0
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51 " not found, in Insert mode try character before the cursor
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52 if c_col > 1 && (mode() == 'i' || mode() == 'R')
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53 let before = 1
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54 let c = getline(c_lnum)[c_col - 2]
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55 let i = index(plist, c)
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56 endif
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57 if i < 0
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58 " not found, nothing to do
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59 return
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60 endif
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61 endif
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62
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63 " Figure out the arguments for searchpairpos().
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64 if i % 2 == 0
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65 let s_flags = 'nW'
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66 let c2 = plist[i + 1]
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67 else
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68 let s_flags = 'nbW'
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69 let c2 = c
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70 let c = plist[i - 1]
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71 endif
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72 if c == '['
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73 let c = '\['
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74 let c2 = '\]'
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75 endif
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76
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77 " Find the match. When it was just before the cursor move it there for a
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702
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78 " moment.
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694
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79 if before > 0
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886
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80 let save_cursor = winsaveview()
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694
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81 call cursor(c_lnum, c_col - before)
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82 endif
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845
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83
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84 " When not in a string or comment ignore matches inside them.
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3082
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85 " We match "escape" for special items, such as lispEscapeSpecial.
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845
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86 let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' .
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2662
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87 \ '=~? "string\\|character\\|singlequote\\|escape\\|comment"'
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845
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88 execute 'if' s_skip '| let s_skip = 0 | endif'
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89
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1556
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90 " Limit the search to lines visible in the window.
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91 let stoplinebottom = line('w$')
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92 let stoplinetop = line('w0')
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93 if i % 2 == 0
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94 let stopline = stoplinebottom
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95 else
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96 let stopline = stoplinetop
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97 endif
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98
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1496
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99 try
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1556
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100 " Limit the search time to 300 msec to avoid a hang on very long lines.
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101 " This fails when a timeout is not supported.
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102 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, 300)
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1496
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103 catch /E118/
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1556
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104 " Can't use the timeout, restrict the stopline a bit more to avoid taking
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105 " a long time on closed folds and long lines.
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106 " The "viewable" variables give a range in which we can scroll while
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107 " keeping the cursor at the same position.
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108 " adjustedScrolloff accounts for very large numbers of scrolloff.
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109 let adjustedScrolloff = min([&scrolloff, (line('w$') - line('w0')) / 2])
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110 let bottom_viewable = min([line('$'), c_lnum + &lines - adjustedScrolloff - 2])
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111 let top_viewable = max([1, c_lnum-&lines+adjustedScrolloff + 2])
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112 " one of these stoplines will be adjusted below, but the current values are
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113 " minimal boundaries within the current window
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114 if i % 2 == 0
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115 if has("byte_offset") && has("syntax_items") && &smc > 0
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116 let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2])
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117 let stopline = min([bottom_viewable, byte2line(stopbyte)])
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118 else
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119 let stopline = min([bottom_viewable, c_lnum + 100])
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120 endif
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121 let stoplinebottom = stopline
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122 else
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123 if has("byte_offset") && has("syntax_items") && &smc > 0
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124 let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2])
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125 let stopline = max([top_viewable, byte2line(stopbyte)])
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126 else
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127 let stopline = max([top_viewable, c_lnum - 100])
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128 endif
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129 let stoplinetop = stopline
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130 endif
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1496
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131 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)
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132 endtry
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845
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133
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694
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134 if before > 0
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886
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135 call winrestview(save_cursor)
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694
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136 endif
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137
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138 " If a match is found setup match highlighting.
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1334
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139 if m_lnum > 0 && m_lnum >= stoplinetop && m_lnum <= stoplinebottom
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698
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140 exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) .
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694
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141 \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/'
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819
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142 let w:paren_hl_on = 1
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694
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143 endif
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144 endfunction
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145
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146 " Define commands that will disable and enable the plugin.
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1368
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147 command! NoMatchParen windo 3match none | unlet! g:loaded_matchparen |
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148 \ au! matchparen
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149 command! DoMatchParen runtime plugin/matchparen.vim | windo doau CursorMoved
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757
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150
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2034
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151 let &cpo = s:cpo_save
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152 unlet s:cpo_save
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