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annotate runtime/pack/dist/opt/justify/plugin/justify.vim @ 8769:7ac9d9e98892 v7.4.1673

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commit https://github.com/vim/vim/commit/2946d0236dc9e23ec0050feacdb959b9ae5672a8 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Mar 28 20:53:08 2016 +0200 patch 7.4.1673 Problem: The justify plugin has to be copied or sourced to be used. Solution: Turn it into a package.
author Christian Brabandt <cb@256bit.org>
date Mon, 28 Mar 2016 21:00:07 +0200
parents
children 20ab46fe8a16
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8769
7ac9d9e98892 commit https://github.com/vim/vim/commit/2946d0236dc9e23ec0050feacdb959b9ae5672a8
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1 " Function to left and right align text.
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2 "
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3 " Written by: Preben "Peppe" Guldberg <c928400@student.dtu.dk>
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4 " Created: 980806 14:13 (or around that time anyway)
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5 " Revised: 001103 00:36 (See "Revisions" below)
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8 " function Justify( [ textwidth [, maxspaces [, indent] ] ] )
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9 "
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10 " Justify() will left and right align a line by filling in an
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11 " appropriate amount of spaces. Extra spaces are added to existing
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12 " spaces starting from the right side of the line. As an example, the
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13 " following documentation has been justified.
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14 "
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15 " The function takes the following arguments:
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7ac9d9e98892 commit https://github.com/vim/vim/commit/2946d0236dc9e23ec0050feacdb959b9ae5672a8
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17 " textwidth argument
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18 " ------------------
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19 " If not specified, the value of the 'textwidth' option is used. If
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20 " 'textwidth' is zero a value of 80 is used.
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21 "
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22 " Additionally the arguments 'tw' and '' are accepted. The value of
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23 " 'textwidth' will be used. These are handy, if you just want to specify
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24 " the maxspaces argument.
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26 " maxspaces argument
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27 " ------------------
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28 " If specified, alignment will only be done, if the longest space run
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29 " after alignment is no longer than maxspaces.
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30 "
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31 " An argument of '' is accepted, should the user like to specify all
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32 " arguments.
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33 "
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34 " To aid user defined commands, negative values are accepted aswell.
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35 " Using a negative value specifies the default behaviour: any length of
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36 " space runs will be used to justify the text.
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38 " indent argument
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39 " ---------------
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40 " This argument specifies how a line should be indented. The default is
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41 " to keep the current indentation.
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42 "
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43 " Negative values: Keep current amount of leading whitespace.
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44 " Positive values: Indent all lines with leading whitespace using this
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45 " amount of whitespace.
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46 "
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47 " Note that the value 0, needs to be quoted as a string. This value
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48 " leads to a left flushed text.
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49 "
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50 " Additionally units of 'shiftwidth'/'sw' and 'tabstop'/'ts' may be
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51 " added. In this case, if the value of indent is positive, the amount of
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52 " whitespace to be added will be multiplied by the value of the
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53 " 'shiftwidth' and 'tabstop' settings. If these units are used, the
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54 " argument must be given as a string, eg. Justify('','','2sw').
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55 "
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56 " If the values of 'sw' or 'tw' are negative, they are treated as if
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57 " they were 0, which means that the text is flushed left. There is no
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58 " check if a negative number prefix is used to change the sign of a
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59 " negative 'sw' or 'ts' value.
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60 "
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61 " As with the other arguments, '' may be used to get the default
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62 " behaviour.
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65 " Notes:
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66 "
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67 " If the line, adjusted for space runs and leading/trailing whitespace,
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68 " is wider than the used textwidth, the line will be left untouched (no
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69 " whitespace removed). This should be equivalent to the behaviour of
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70 " :left, :right and :center.
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71 "
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72 " If the resulting line is shorter than the used textwidth it is left
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73 " untouched.
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74 "
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75 " All space runs in the line are truncated before the alignment is
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76 " carried out.
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77 "
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78 " If you have set 'noexpandtab', :retab! is used to replace space runs
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79 " with whitespace using the value of 'tabstop'. This should be
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80 " conformant with :left, :right and :center.
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81 "
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82 " If joinspaces is set, an extra space is added after '.', '?' and '!'.
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83 " If 'cpooptions' include 'j', extra space is only added after '.'.
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84 " (This may on occasion conflict with maxspaces.)
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85
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86
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87 " Related mappings:
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88 "
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89 " Mappings that will align text using the current text width, using at
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90 " most four spaces in a space run and keeping current indentation.
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91 nmap _j :%call Justify('tw',4)<CR>
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92 vmap _j :call Justify('tw',4)<CR>
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93 "
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94 " Mappings that will remove space runs and format lines (might be useful
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95 " prior to aligning the text).
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96 nmap ,gq :%s/\s\+/ /g<CR>gq1G
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97 vmap ,gq :s/\s\+/ /g<CR>gvgq
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98
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99
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100 " User defined command:
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101 "
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102 " The following is an ex command that works as a shortcut to the Justify
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103 " function. Arguments to Justify() can be added after the command.
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104 com! -range -nargs=* Justify <line1>,<line2>call Justify(<f-args>)
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105 "
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106 " The following commands are all equivalent:
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107 "
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108 " 1. Simplest use of Justify():
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109 " :call Justify()
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110 " :Justify
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111 "
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112 " 2. The _j mapping above via the ex command:
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113 " :%Justify tw 4
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114 "
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115 " 3. Justify visualised text at 72nd column while indenting all
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116 " previously indented text two shiftwidths
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117 " :'<,'>call Justify(72,'','2sw')
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118 " :'<,'>Justify 72 -1 2sw
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119 "
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120 " This documentation has been justified using the following command:
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121 ":se et|kz|1;/^" function Justify(/+,'z-g/^" /s/^" //|call Justify(70,3)|s/^/" /
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122
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123 " Revisions:
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124 " 001103: If 'joinspaces' was set, calculations could be wrong.
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125 " Tabs at start of line could also lead to errors.
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126 " Use setline() instead of "exec 's/foo/bar/' - safer.
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127 " Cleaned up the code a bit.
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128 "
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129 " Todo: Convert maps to the new script specific form
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130
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131 " Error function
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132 function! Justify_error(message)
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133 echohl Error
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134 echo "Justify([tw, [maxspaces [, indent]]]): " . a:message
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135 echohl None
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136 endfunction
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137
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138
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139 " Now for the real thing
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140 function! Justify(...) range
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141
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142 if a:0 > 3
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143 call Justify_error("Too many arguments (max 3)")
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144 return 1
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145 endif
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146
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147 " Set textwidth (accept 'tw' and '' as arguments)
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148 if a:0 >= 1
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149 if a:1 =~ '^\(tw\)\=$'
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150 let tw = &tw
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151 elseif a:1 =~ '^\d\+$'
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152 let tw = a:1
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153 else
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154 call Justify_error("tw must be a number (>0), '' or 'tw'")
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155 return 2
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156 endif
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157 else
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158 let tw = &tw
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159 endif
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160 if tw == 0
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161 let tw = 80
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162 endif
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163
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164 " Set maximum number of spaces between WORDs
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165 if a:0 >= 2
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166 if a:2 == ''
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167 let maxspaces = tw
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168 elseif a:2 =~ '^-\d\+$'
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169 let maxspaces = tw
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170 elseif a:2 =~ '^\d\+$'
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171 let maxspaces = a:2
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172 else
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173 call Justify_error("maxspaces must be a number or ''")
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174 return 3
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175 endif
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176 else
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177 let maxspaces = tw
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178 endif
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179 if maxspaces <= 1
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180 call Justify_error("maxspaces should be larger than 1")
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181 return 4
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182 endif
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183
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184 " Set the indentation style (accept sw and ts units)
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185 let indent_fix = ''
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186 if a:0 >= 3
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187 if (a:3 == '') || a:3 =~ '^-[1-9]\d*\(shiftwidth\|sw\|tabstop\|ts\)\=$'
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188 let indent = -1
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189 elseif a:3 =~ '^-\=0\(shiftwidth\|sw\|tabstop\|ts\)\=$'
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190 let indent = 0
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191 elseif a:3 =~ '^\d\+\(shiftwidth\|sw\|tabstop\|ts\)\=$'
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192 let indent = substitute(a:3, '\D', '', 'g')
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193 elseif a:3 =~ '^\(shiftwidth\|sw\|tabstop\|ts\)$'
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194 let indent = 1
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195 else
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196 call Justify_error("indent: a number with 'sw'/'ts' unit")
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197 return 5
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198 endif
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199 if indent >= 0
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200 while indent > 0
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201 let indent_fix = indent_fix . ' '
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202 let indent = indent - 1
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203 endwhile
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204 let indent_sw = 0
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205 if a:3 =~ '\(shiftwidth\|sw\)'
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206 let indent_sw = &sw
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207 elseif a:3 =~ '\(tabstop\|ts\)'
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208 let indent_sw = &ts
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209 endif
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210 let indent_fix2 = ''
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211 while indent_sw > 0
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212 let indent_fix2 = indent_fix2 . indent_fix
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213 let indent_sw = indent_sw - 1
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214 endwhile
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215 let indent_fix = indent_fix2
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216 endif
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217 else
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218 let indent = -1
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219 endif
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220
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221 " Avoid substitution reports
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222 let save_report = &report
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223 set report=1000000
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224
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225 " Check 'joinspaces' and 'cpo'
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226 if &js == 1
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227 if &cpo =~ 'j'
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228 let join_str = '\(\. \)'
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229 else
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230 let join_str = '\([.!?!] \)'
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231 endif
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232 endif
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233
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234 let cur = a:firstline
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235 while cur <= a:lastline
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236
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237 let str_orig = getline(cur)
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238 let save_et = &et
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239 set et
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240 exec cur . "retab"
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241 let &et = save_et
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242 let str = getline(cur)
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243
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244 let indent_str = indent_fix
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245 let indent_n = strlen(indent_str)
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246 " Shall we remember the current indentation
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247 if indent < 0
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248 let indent_orig = matchstr(str_orig, '^\s*')
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249 if strlen(indent_orig) > 0
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250 let indent_str = indent_orig
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251 let indent_n = strlen(matchstr(str, '^\s*'))
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252 endif
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253 endif
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254
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255 " Trim trailing, leading and running whitespace
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256 let str = substitute(str, '\s\+$', '', '')
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257 let str = substitute(str, '^\s\+', '', '')
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258 let str = substitute(str, '\s\+', ' ', 'g')
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259 let str_n = strdisplaywidth(str)
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260
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261 " Possible addition of space after punctuation
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262 if exists("join_str")
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263 let str = substitute(str, join_str, '\1 ', 'g')
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264 endif
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265 let join_n = strdisplaywidth(str) - str_n
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266
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267 " Can extraspaces be added?
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268 " Note that str_n may be less than strlen(str) [joinspaces above]
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269 if strdisplaywidth(str) <= tw - indent_n && str_n > 0
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270 " How many spaces should be added
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271 let s_add = tw - str_n - indent_n - join_n
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272 let s_nr = strlen(substitute(str, '\S', '', 'g') ) - join_n
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273 let s_dup = s_add / s_nr
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274 let s_mod = s_add % s_nr
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275
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276 " Test if the changed line fits with tw
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277 if 0 <= (str_n + (maxspaces - 1)*s_nr + indent_n) - tw
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278
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279 " Duplicate spaces
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280 while s_dup > 0
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281 let str = substitute(str, '\( \+\)', ' \1', 'g')
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282 let s_dup = s_dup - 1
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283 endwhile
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284
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285 " Add extra spaces from the end
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286 while s_mod > 0
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287 let str = substitute(str, '\(\(\s\+\S\+\)\{' . s_mod . '}\)$', ' \1', '')
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288 let s_mod = s_mod - 1
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289 endwhile
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290
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291 " Indent the line
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292 if indent_n > 0
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293 let str = substitute(str, '^', indent_str, '' )
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294 endif
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295
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296 " Replace the line
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297 call setline(cur, str)
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298
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299 " Convert to whitespace
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300 if &et == 0
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301 exec cur . 'retab!'
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302 endif
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303
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304 endif " Change of line
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305 endif " Possible change
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306
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307 let cur = cur + 1
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308 endwhile
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310 norm ^
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312 let &report = save_report
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314 endfunction
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316 " EOF vim: tw=78 ts=8 sw=4 sts=4 noet ai