annotate runtime/indent/tex.vim @ 25773:11b656e74444

Update runtime files Commit: https://github.com/vim/vim/commit/6c391a74fe90190796ca0b0c010112948a6e75d7 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 9 21:55:11 2021 +0200 Update runtime files
author Bram Moolenaar <Bram@vim.org>
date Thu, 09 Sep 2021 22:00:10 +0200
parents 74e3316c1d5a
children 5c220cf30f1f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 " Vim indent file
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2 " Language: LaTeX
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3 " Maintainer: Yichao Zhou <broken.zhou AT gmail.com>
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4 " Created: Sat, 16 Feb 2002 16:50:19 +0100
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5 " Version: 1.0.0
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6 " Please email me if you found something I can do. Comments, bug report and
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7 " feature request are welcome.
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8
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9 " Last Update: {{{
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10 " 25th Sep 2002, by LH :
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11 " (*) better support for the option
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12 " (*) use some regex instead of several '||'.
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13 " Oct 9th, 2003, by JT:
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14 " (*) don't change indentation of lines starting with '%'
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15 " 2005/06/15, Moshe Kaminsky <kaminsky AT math.huji.ac.il>
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16 " (*) New variables:
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17 " g:tex_items, g:tex_itemize_env, g:tex_noindent_env
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18 " 2011/3/6, by Yichao Zhou <broken.zhou AT gmail.com>
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19 " (*) Don't change indentation of lines starting with '%'
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20 " I don't see any code with '%' and it doesn't work properly
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21 " so I add some code.
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22 " (*) New features: Add smartindent-like indent for "{}" and "[]".
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23 " (*) New variables: g:tex_indent_brace
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24 " 2011/9/25, by Yichao Zhou <broken.zhou AT gmail.com>
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25 " (*) Bug fix: smartindent-like indent for "[]"
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26 " (*) New features: Align with "&".
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27 " (*) New variable: g:tex_indent_and.
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28 " 2011/10/23 by Yichao Zhou <broken.zhou AT gmail.com>
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29 " (*) Bug fix: improve the smartindent-like indent for "{}" and
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30 " "[]".
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31 " 2012/02/27 by Yichao Zhou <broken.zhou AT gmail.com>
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32 " (*) Bug fix: support default folding marker.
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33 " (*) Indent with "&" is not very handy. Make it not enable by
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34 " default.
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35 " 2012/03/06 by Yichao Zhou <broken.zhou AT gmail.com>
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36 " (*) Modify "&" behavior and make it default again. Now "&"
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37 " won't align when there are more then one "&" in the previous
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38 " line.
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39 " (*) Add indent "\left(" and "\right)"
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40 " (*) Trust user when in "verbatim" and "lstlisting"
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41 " 2012/03/11 by Yichao Zhou <broken.zhou AT gmail.com>
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42 " (*) Modify "&" so that only indent when current line start with
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43 " "&".
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44 " 2012/03/12 by Yichao Zhou <broken.zhou AT gmail.com>
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45 " (*) Modify indentkeys.
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46 " 2012/03/18 by Yichao Zhou <broken.zhou AT gmail.com>
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47 " (*) Add &cpo
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48 " 2013/05/02 by Yichao Zhou <broken.zhou AT gmail.com>
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49 " (*) Fix problem about GetTeXIndent checker. Thank Albert Netymk
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50 " for reporting this.
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51 " 2014/06/23 by Yichao Zhou <broken.zhou AT gmail.com>
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52 " (*) Remove the feature g:tex_indent_and because it is buggy.
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53 " (*) If there is not any obvious indentation hints, we do not
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54 " alert our user's current indentation.
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55 " (*) g:tex_indent_brace now only works if the open brace is the
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56 " last character of that line.
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57 " 2014/08/03 by Yichao Zhou <broken.zhou AT gmail.com>
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58 " (*) Indent current line if last line has larger indentation
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59 " 2016/11/08 by Yichao Zhou <broken.zhou AT gmail.com>
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60 " (*) Fix problems for \[ and \]. Thanks Bruno for reporting.
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61 " 2017/04/30 by Yichao Zhou <broken.zhou AT gmail.com>
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62 " (*) Fix a bug between g:tex_noindent_env and g:tex_indent_items
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63 " Now g:tex_noindent_env='document\|verbatim\|itemize' (Emacs
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64 " style) is supported. Thanks Miles Wheeler for reporting.
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65 " 2018/02/07 by Yichao Zhou <broken.zhou AT gmail.com>
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66 " (*) Make indentation more smart in the normal mode
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67 " 2020/04/26 by Yichao Zhou <broken.zhou AT gmail.com>
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68 " (*) Fix a bug related to \[ & \]. Thanks Manuel Boni for
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69 " reporting.
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70 "
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71 " }}}
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72
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73 " Document: {{{
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74 "
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75 " For proper latex experience, please put
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76 " let g:tex_flavor = "latex"
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77 " into your vimrc.
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78 "
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79 " * g:tex_indent_brace
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80 "
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81 " If this variable is unset or non-zero, it will use smartindent-like style
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82 " for "{}" and "[]". Now this only works if the open brace is the last
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83 " character of that line.
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84 "
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85 " % Example 1
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86 " \usetikzlibrary{
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87 " external
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88 " }
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89 "
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90 " % Example 2
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91 " \tikzexternalize[
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92 " prefix=tikz]
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93 "
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94 " * g:tex_indent_items
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95 "
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96 " If this variable is set, item-environments are indented like Emacs does
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97 " it, i.e., continuation lines are indented with a shiftwidth.
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98 "
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99 " set unset
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100 " ------------------------------------------------------
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101 " \begin{itemize} \begin{itemize}
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102 " \item blablabla \item blablabla
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103 " bla bla bla bla bla bla
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104 " \item blablabla \item blablabla
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105 " bla bla bla bla bla bla
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106 " \end{itemize} \end{itemize}
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107 "
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108 "
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109 " * g:tex_items
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110 "
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111 " A list of tokens to be considered as commands for the beginning of an item
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112 " command. The tokens should be separated with '\|'. The initial '\' should
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113 " be escaped. The default is '\\bibitem\|\\item'.
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114 "
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115 " * g:tex_itemize_env
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116 "
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117 " A list of environment names, separated with '\|', where the items (item
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118 " commands matching g:tex_items) may appear. The default is
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119 " 'itemize\|description\|enumerate\|thebibliography'.
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120 "
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121 " * g:tex_noindent_env
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122 "
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123 " A list of environment names. separated with '\|', where no indentation is
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124 " required. The default is 'document\|verbatim'.
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125 " }}}
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126
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127 " Only define the function once
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128 if exists("b:did_indent")
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129 finish
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130 endif
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131
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132 let s:cpo_save = &cpo
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133 set cpo&vim
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134
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135 " Define global variable {{{
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136
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137 let b:did_indent = 1
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138
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139 if !exists("g:tex_indent_items")
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140 let g:tex_indent_items = 1
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141 endif
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142 if !exists("g:tex_indent_brace")
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143 let g:tex_indent_brace = 1
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144 endif
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145 if !exists("g:tex_max_scan_line")
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146 let g:tex_max_scan_line = 60
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147 endif
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148 if g:tex_indent_items
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149 if !exists("g:tex_itemize_env")
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150 let g:tex_itemize_env = 'itemize\|description\|enumerate\|thebibliography'
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151 endif
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152 if !exists('g:tex_items')
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153 let g:tex_items = '\\bibitem\|\\item'
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154 endif
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155 else
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156 let g:tex_items = ''
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157 endif
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158
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159 if !exists("g:tex_noindent_env")
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160 let g:tex_noindent_env = 'document\|verbatim\|lstlisting'
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161 endif "}}}
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162
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163 " VIM Setting " {{{
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164 setlocal autoindent
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165 setlocal nosmartindent
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166 setlocal indentexpr=GetTeXIndent()
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167 setlocal indentkeys&
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168 exec 'setlocal indentkeys+=[,(,{,),},],\&' . substitute(g:tex_items, '^\|\(\\|\)', ',=', 'g')
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169 let g:tex_items = '^\s*' . substitute(g:tex_items, '^\(\^\\s\*\)*', '', '')
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170 " }}}
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171
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172 function! GetTeXIndent() " {{{
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173 " Find a non-blank line above the current line.
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174 let lnum = prevnonblank(v:lnum - 1)
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175 let cnum = v:lnum
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176
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177 " Comment line is not what we need.
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178 while lnum != 0 && getline(lnum) =~ '^\s*%'
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179 let lnum = prevnonblank(lnum - 1)
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180 endwhile
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181
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182 " At the start of the file use zero indent.
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183 if lnum == 0
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184 return 0
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185 endif
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186
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187 let line = substitute(getline(lnum), '\s*%.*', '','g') " last line
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188 let cline = substitute(getline(v:lnum), '\s*%.*', '', 'g') " current line
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189
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190 let ccol = 1
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191 while cline[ccol] =~ '\s'
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192 let ccol += 1
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193 endwhile
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194
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195 " We are in verbatim, so do what our user what.
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196 if synIDattr(synID(v:lnum, ccol, 1), "name") == "texZone"
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197 if empty(cline)
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198 return indent(lnum)
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199 else
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200 return indent(v:lnum)
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201 endif
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202 endif
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203
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204 if lnum == 0
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205 return 0
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206 endif
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207
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208 let ind = indent(lnum)
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209 let stay = 1
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210
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211 " New code for comment: retain the indent of current line
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212 if cline =~ '^\s*%'
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213 return indent(v:lnum)
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214 endif
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215
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216 " Add a 'shiftwidth' after beginning of environments.
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217 " Don't add it for \begin{document} and \begin{verbatim}
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218 " if line =~ '^\s*\\begin{\(.*\)}' && line !~ 'verbatim'
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219 " LH modification : \begin does not always start a line
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220 " ZYC modification : \end after \begin won't cause wrong indent anymore
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221 if line =~ '\\begin{.*}'
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222 if line !~ g:tex_noindent_env
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223 let ind = ind + shiftwidth()
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224 let stay = 0
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225 endif
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226
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227 if g:tex_indent_items
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228 " Add another sw for item-environments
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229 if line =~ g:tex_itemize_env
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230 let ind = ind + shiftwidth()
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231 let stay = 0
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232 endif
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233 endif
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234 endif
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235
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236 if cline =~ '\\end{.*}'
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237 let retn = s:GetEndIndentation(v:lnum)
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238 if retn != -1
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239 return retn
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240 endif
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241 end
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242 " Subtract a 'shiftwidth' when an environment ends
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243 if cline =~ '\\end{.*}'
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244 \ && cline !~ g:tex_noindent_env
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245 \ && cline !~ '\\begin{.*}.*\\end{.*}'
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246 if g:tex_indent_items
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247 " Remove another sw for item-environments
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248 if cline =~ g:tex_itemize_env
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249 let ind = ind - shiftwidth()
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250 let stay = 0
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251 endif
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252 endif
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253
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254 let ind = ind - shiftwidth()
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255 let stay = 0
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256 endif
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257
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258 if g:tex_indent_brace
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259 if line =~ '[[{]$'
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260 let ind += shiftwidth()
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261 let stay = 0
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262 endif
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263
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264 if cline =~ '^\s*\\\?[\]}]' && s:CheckPairedIsLastCharacter(v:lnum, ccol)
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265 let ind -= shiftwidth()
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266 let stay = 0
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267 endif
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268
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269 if line !~ '^\s*\\\?[\]}]'
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270 for i in range(1, strlen(line)-1)
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271 let char = line[i]
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272 if char == ']' || char == '}'
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273 if s:CheckPairedIsLastCharacter(lnum, i)
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274 let ind -= shiftwidth()
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275 let stay = 0
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276 endif
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277 endif
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278 endfor
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279 endif
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280 endif
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281
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282 " Special treatment for 'item'
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283 " ----------------------------
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284
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285 if g:tex_indent_items
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286 " '\item' or '\bibitem' itself:
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287 if cline =~ g:tex_items
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288 let ind = ind - shiftwidth()
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289 let stay = 0
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290 endif
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291 " lines following to '\item' are indented once again:
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292 if line =~ g:tex_items
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293 let ind = ind + shiftwidth()
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294 let stay = 0
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295 endif
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296 endif
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297
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298 if stay && mode() == 'i'
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299 " If there is no obvious indentation hint, and indentation is triggered
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300 " in insert mode, we trust our user.
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301 if empty(cline)
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302 return ind
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303 else
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304 return max([indent(v:lnum), s:GetLastBeginIndentation(v:lnum)])
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305 endif
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306 else
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307 return ind
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308 endif
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309 endfunction "}}}
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310
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311 function! s:GetLastBeginIndentation(lnum) " {{{
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312 let matchend = 1
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313 for lnum in range(a:lnum-1, max([a:lnum - g:tex_max_scan_line, 1]), -1)
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314 let line = getline(lnum)
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315 if line =~ '\\end{.*}'
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316 let matchend += 1
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317 endif
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318 if line =~ '\\begin{.*}'
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319 let matchend -= 1
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320 endif
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321 if matchend == 0
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322 if line =~ g:tex_noindent_env
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323 return indent(lnum)
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324 endif
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325 if line =~ g:tex_itemize_env
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326 return indent(lnum) + 2 * shiftwidth()
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327 endif
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328 return indent(lnum) + shiftwidth()
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329 endif
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330 endfor
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331 return -1
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332 endfunction
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333
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334 function! s:GetEndIndentation(lnum) " {{{
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335 if getline(a:lnum) =~ '\\begin{.*}.*\\end{.*}'
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336 return -1
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337 endif
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338
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339 let min_indent = 100
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340 let matchend = 1
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341 for lnum in range(a:lnum-1, max([a:lnum-g:tex_max_scan_line, 1]), -1)
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342 let line = getline(lnum)
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343 if line =~ '\\end{.*}'
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344 let matchend += 1
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345 endif
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346 if line =~ '\\begin{.*}'
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347 let matchend -= 1
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348 endif
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349 if matchend == 0
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350 return indent(lnum)
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351 endif
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352 if !empty(line)
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353 let min_indent = min([min_indent, indent(lnum)])
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354 endif
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355 endfor
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356 return min_indent - shiftwidth()
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357 endfunction
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358
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359 " Most of the code is from matchparen.vim
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360 function! s:CheckPairedIsLastCharacter(lnum, col) "{{{
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361 let c_lnum = a:lnum
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362 let c_col = a:col+1
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363
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364 let line = getline(c_lnum)
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365 if line[c_col-1] == '\'
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366 let c_col = c_col + 1
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367 endif
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368 let c = line[c_col-1]
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369
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370 let plist = split(&matchpairs, '.\zs[:,]')
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371 let i = index(plist, c)
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372 if i < 0
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373 return 0
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374 endif
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375
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376 " Figure out the arguments for searchpairpos().
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377 if i % 2 == 0
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378 let s_flags = 'nW'
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379 let c2 = plist[i + 1]
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380 else
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381 let s_flags = 'nbW'
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382 let c2 = c
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383 let c = plist[i - 1]
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384 endif
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385 if c == '['
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386 let c = '\['
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387 let c2 = '\]'
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388 endif
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389
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390 " Find the match. When it was just before the cursor move it there for a
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391 " moment.
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392 let save_cursor = winsaveview()
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393 call cursor(c_lnum, c_col)
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394
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395 " When not in a string or comment ignore matches inside them.
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396 " We match "escape" for special items, such as lispEscapeSpecial.
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397 let s_skip ='synIDattr(synID(line("."), col("."), 0), "name") ' .
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398 \ '=~? "string\\|character\\|singlequote\\|escape\\|comment"'
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399 execute 'if' s_skip '| let s_skip = 0 | endif'
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400
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401 let stopline = max([0, c_lnum - g:tex_max_scan_line])
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402
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403 " Limit the search time to 300 msec to avoid a hang on very long lines.
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404 " This fails when a timeout is not supported.
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405 try
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406 let [m_lnum, m_col] = searchpairpos(c, '', c2, s_flags, s_skip, stopline, 100)
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407 catch /E118/
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408 endtry
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409
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410 call winrestview(save_cursor)
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411
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412 if m_lnum > 0
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413 let line = getline(m_lnum)
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414 return strlen(line) == m_col
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415 endif
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416
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417 return 0
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418 endfunction "}}}
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419
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420 let &cpo = s:cpo_save
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421 unlet s:cpo_save
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422
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423 " vim: set sw=4 textwidth=80: