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annotate runtime/plugin/matchparen.vim @ 30487:79e2d9b7780c v9.0.0579

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patch 9.0.0579: using freed memory when 'tagfunc' wipes out buffer Commit: https://github.com/vim/vim/commit/0ff01835a40f549c5c4a550502f62a2ac9ac447c Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 24 19:20:30 2022 +0100 patch 9.0.0579: using freed memory when 'tagfunc' wipes out buffer Problem: Using freed memory when 'tagfunc' wipes out buffer that holds 'complete'. Solution: Make a copy of the option. Make sure cursor position is valid.
author Bram Moolenaar <Bram@vim.org>
date Sat, 24 Sep 2022 20:30:03 +0200
parents b15334beeaa4
children 985a3d6e1d4b
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rev   line source
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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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3 " Last Change: 2021 Apr 08
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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 if exists("g:loaded_matchparen") || &cp
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9 finish
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10 endif
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11 let g:loaded_matchparen = 1
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12
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13 if !exists("g:matchparen_timeout")
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14 let g:matchparen_timeout = 300
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15 endif
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16 if !exists("g:matchparen_insert_timeout")
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17 let g:matchparen_insert_timeout = 60
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18 endif
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19
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20 augroup matchparen
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21 " Replace all matchparen autocommands
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22 autocmd! CursorMoved,CursorMovedI,WinEnter,WinScrolled * call s:Highlight_Matching_Pair()
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23 autocmd! WinLeave * call s:Remove_Matches()
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24 if exists('##TextChanged')
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25 autocmd! TextChanged,TextChangedI * call s:Highlight_Matching_Pair()
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26 endif
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27 augroup END
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28
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29 " Skip the rest if it was already done.
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30 if exists("*s:Highlight_Matching_Pair")
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31 finish
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32 endif
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33
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34 let s:cpo_save = &cpo
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35 set cpo-=C
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36
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37 " The function that is invoked (very often) to define a ":match" highlighting
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38 " for any matching paren.
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39 func s:Highlight_Matching_Pair()
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40 " Remove any previous match.
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41 call s:Remove_Matches()
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42
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43 " Avoid that we remove the popup menu.
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44 " Return when there are no colors (looks like the cursor jumps).
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45 if pumvisible() || (&t_Co < 8 && !has("gui_running"))
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46 return
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47 endif
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48
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49 " Get the character under the cursor and check if it's in 'matchpairs'.
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50 let c_lnum = line('.')
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51 let c_col = col('.')
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52 let before = 0
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53
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54 let text = getline(c_lnum)
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55 let matches = matchlist(text, '\(.\)\=\%'.c_col.'c\(.\=\)')
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56 if empty(matches)
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57 let [c_before, c] = ['', '']
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58 else
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59 let [c_before, c] = matches[1:2]
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60 endif
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61 let plist = split(&matchpairs, '.\zs[:,]')
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62 let i = index(plist, c)
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63 if i < 0
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64 " not found, in Insert mode try character before the cursor
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65 if c_col > 1 && (mode() == 'i' || mode() == 'R')
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66 let before = strlen(c_before)
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67 let c = c_before
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68 let i = index(plist, c)
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69 endif
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70 if i < 0
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71 " not found, nothing to do
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72 return
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73 endif
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74 endif
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75
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76 " Figure out the arguments for searchpairpos().
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77 if i % 2 == 0
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78 let s_flags = 'nW'
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79 let c2 = plist[i + 1]
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80 else
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81 let s_flags = 'nbW'
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82 let c2 = c
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83 let c = plist[i - 1]
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84 endif
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85 if c == '['
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86 let c = '\['
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87 let c2 = '\]'
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88 endif
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89
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90 " Find the match. When it was just before the cursor move it there for a
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91 " moment.
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92 if before > 0
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93 let has_getcurpos = exists("*getcurpos")
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94 if has_getcurpos
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95 " getcurpos() is more efficient but doesn't exist before 7.4.313.
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96 let save_cursor = getcurpos()
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97 else
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98 let save_cursor = winsaveview()
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99 endif
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100 call cursor(c_lnum, c_col - before)
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101 endif
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102
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103 if !has("syntax") || !exists("g:syntax_on")
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104 let s_skip = "0"
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105 else
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106 " Build an expression that detects whether the current cursor position is
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107 " in certain syntax types (string, comment, etc.), for use as
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108 " searchpairpos()'s skip argument.
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109 " We match "escape" for special items, such as lispEscapeSpecial, and
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110 " match "symbol" for lispBarSymbol.
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111 let s_skip = '!empty(filter(map(synstack(line("."), col(".")), ''synIDattr(v:val, "name")''), ' .
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112 \ '''v:val =~? "string\\|character\\|singlequote\\|escape\\|symbol\\|comment"''))'
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113 " If executing the expression determines that the cursor is currently in
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114 " one of the syntax types, then we want searchpairpos() to find the pair
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115 " within those syntax types (i.e., not skip). Otherwise, the cursor is
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116 " outside of the syntax types and s_skip should keep its value so we skip
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117 " any matching pair inside the syntax types.
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118 " Catch if this throws E363: pattern uses more memory than 'maxmempattern'.
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119 try
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120 execute 'if ' . s_skip . ' | let s_skip = "0" | endif'
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121 catch /^Vim\%((\a\+)\)\=:E363/
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122 " We won't find anything, so skip searching, should keep Vim responsive.
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123 return
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124 endtry
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125 endif
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126
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127 " Limit the search to lines visible in the window.
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128 let stoplinebottom = line('w$')
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129 let stoplinetop = line('w0')
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130 if i % 2 == 0
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131 let stopline = stoplinebottom
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132 else
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133 let stopline = stoplinetop
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134 endif
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135
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136 " Limit the search time to 300 msec to avoid a hang on very long lines.
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137 " This fails when a timeout is not supported.
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138 if mode() == 'i' || mode() == 'R'
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139 let timeout = exists("b:matchparen_insert_timeout") ? b:matchparen_insert_timeout : g:matchparen_insert_timeout
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140 else
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141 let timeout = exists("b:matchparen_timeout") ? b:matchparen_timeout : g:matchparen_timeout
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142 endif
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143 try
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144 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, timeout)
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145 catch /E118/
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146 " Can't use the timeout, restrict the stopline a bit more to avoid taking
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147 " a long time on closed folds and long lines.
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148 " The "viewable" variables give a range in which we can scroll while
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149 " keeping the cursor at the same position.
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150 " adjustedScrolloff accounts for very large numbers of scrolloff.
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151 let adjustedScrolloff = min([&scrolloff, (line('w$') - line('w0')) / 2])
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152 let bottom_viewable = min([line('$'), c_lnum + &lines - adjustedScrolloff - 2])
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153 let top_viewable = max([1, c_lnum-&lines+adjustedScrolloff + 2])
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154 " one of these stoplines will be adjusted below, but the current values are
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155 " minimal boundaries within the current window
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156 if i % 2 == 0
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157 if has("byte_offset") && has("syntax_items") && &smc > 0
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158 let stopbyte = min([line2byte("$"), line2byte(".") + col(".") + &smc * 2])
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159 let stopline = min([bottom_viewable, byte2line(stopbyte)])
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160 else
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161 let stopline = min([bottom_viewable, c_lnum + 100])
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162 endif
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163 let stoplinebottom = stopline
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164 else
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165 if has("byte_offset") && has("syntax_items") && &smc > 0
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166 let stopbyte = max([1, line2byte(".") + col(".") - &smc * 2])
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167 let stopline = max([top_viewable, byte2line(stopbyte)])
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168 else
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169 let stopline = max([top_viewable, c_lnum - 100])
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170 endif
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171 let stoplinetop = stopline
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172 endif
1496
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173 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline)
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174 endtry
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175
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176 if before > 0
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177 if has_getcurpos
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178 call setpos('.', save_cursor)
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179 else
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180 call winrestview(save_cursor)
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181 endif
694
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182 endif
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183
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184 " If a match is found setup match highlighting.
1334
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185 if m_lnum > 0 && m_lnum >= stoplinetop && m_lnum <= stoplinebottom
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186 if exists('*matchaddpos')
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187 call matchaddpos('MatchParen', [[c_lnum, c_col - before], [m_lnum, m_col]], 10, 3)
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188 else
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189 exe '3match MatchParen /\(\%' . c_lnum . 'l\%' . (c_col - before) .
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190 \ 'c\)\|\(\%' . m_lnum . 'l\%' . m_col . 'c\)/'
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191 endif
819
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192 let w:paren_hl_on = 1
694
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193 endif
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194 endfunction
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195
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196 func s:Remove_Matches()
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197 if exists('w:paren_hl_on') && w:paren_hl_on
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198 silent! call matchdelete(3)
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199 let w:paren_hl_on = 0
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200 endif
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201 endfunc
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parents: 18489
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202
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parents: 18489
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203
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204 " Define commands that will disable and enable the plugin.
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205 command DoMatchParen call s:DoMatchParen()
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206 command NoMatchParen call s:NoMatchParen()
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Christian Brabandt <cb@256bit.org>
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207
18489
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parents: 14254
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208 func s:NoMatchParen()
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209 let w = winnr()
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210 noau windo silent! call matchdelete(3)
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211 unlet! g:loaded_matchparen
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212 exe "noau ". w . "wincmd w"
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213 au! matchparen
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214 endfunc
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diff changeset
215
18489
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216 func s:DoMatchParen()
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217 runtime plugin/matchparen.vim
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218 let w = winnr()
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219 silent windo doau CursorMoved
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220 exe "noau ". w . "wincmd w"
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diff changeset
221 endfunc
757
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vimboss
parents: 711
diff changeset
222
2034
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Bram Moolenaar <bram@zimbu.org>
parents: 1556
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223 let &cpo = s:cpo_save
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Bram Moolenaar <bram@zimbu.org>
parents: 1556
diff changeset
224 unlet s:cpo_save