annotate runtime/indent/json.vim @ 31179:551a8be12cf9

Added tag v9.0.0923 for changeset f1c345ae4d898c6a86e5cb72b535380cc989e067
author Bram Moolenaar <Bram@vim.org>
date Tue, 22 Nov 2022 21:45:03 +0100
parents fee9eccee266
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 " Vim indent file
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2 " Language: JSON
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3 " Maintainer: Eli Parra <eli@elzr.com> https://github.com/elzr/vim-json
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4 " Last Change: 2020 Aug 30
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5 " https://github.com/jakar/vim-json/commit/20b650e22aa750c4ab6a66aa646bdd95d7cd548a#diff-e81fc111b2052e306d126bd9989f7b7c
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6 " 2022 Sep 07: b:undo_indent added by Doug Kearns
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7 " Original Author: Rogerz Zhang <rogerz.zhang at gmail.com> http://github.com/rogerz/vim-json
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8 " Acknowledgement: Based off of vim-javascript maintained by Darrick Wiebe
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9 " http://www.vim.org/scripts/script.php?script_id=2765
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10
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11 " 0. Initialization {{{1
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12 " =================
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13
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14 " Only load this indent file when no other was loaded.
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15 if exists("b:did_indent")
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16 finish
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17 endif
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18 let b:did_indent = 1
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19
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20 setlocal nosmartindent
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21
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22 " Now, set up our indentation expression and keys that trigger it.
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23 setlocal indentexpr=GetJSONIndent(v:lnum)
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24 setlocal indentkeys=0{,0},0),0[,0],!^F,o,O,e
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25
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26 let b:undo_indent = "setl inde< indk< si<"
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27
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28 " Only define the function once.
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29 if exists("*GetJSONIndent")
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30 finish
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31 endif
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32
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33 let s:cpo_save = &cpo
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34 set cpo&vim
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35
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36 " 1. Variables {{{1
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37 " ============
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38
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39 let s:line_term = '\s*\%(\%(\/\/\).*\)\=$'
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40 " Regex that defines blocks.
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41 let s:block_regex = '\%({\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term
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42
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43 " 2. Auxiliary Functions {{{1
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44 " ======================
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45
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46 " Check if the character at lnum:col is inside a string.
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47 function s:IsInString(lnum, col)
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48 return synIDattr(synID(a:lnum, a:col, 1), 'name') == 'jsonString'
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49 endfunction
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50
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51 " Find line above 'lnum' that isn't empty, or in a string.
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52 function s:PrevNonBlankNonString(lnum)
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53 let lnum = prevnonblank(a:lnum)
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54 while lnum > 0
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55 " If the line isn't empty or in a string, end search.
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56 let line = getline(lnum)
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57 if !(s:IsInString(lnum, 1) && s:IsInString(lnum, strlen(line)))
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58 break
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59 endif
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60 let lnum = prevnonblank(lnum - 1)
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61 endwhile
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62 return lnum
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63 endfunction
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64
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65 " Check if line 'lnum' has more opening brackets than closing ones.
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66 function s:LineHasOpeningBrackets(lnum)
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67 let open_0 = 0
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68 let open_2 = 0
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69 let open_4 = 0
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70 let line = getline(a:lnum)
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71 let pos = match(line, '[][(){}]', 0)
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72 while pos != -1
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73 let idx = stridx('(){}[]', line[pos])
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74 if idx % 2 == 0
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75 let open_{idx} = open_{idx} + 1
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76 else
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77 let open_{idx - 1} = open_{idx - 1} - 1
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78 endif
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79 let pos = match(line, '[][(){}]', pos + 1)
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80 endwhile
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81 return (open_0 > 0) . (open_2 > 0) . (open_4 > 0)
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82 endfunction
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83
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84 function s:Match(lnum, regex)
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85 let col = match(getline(a:lnum), a:regex) + 1
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86 return col > 0 && !s:IsInString(a:lnum, col) ? col : 0
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87 endfunction
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88
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89 " 3. GetJSONIndent Function {{{1
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90 " =========================
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91
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92 function GetJSONIndent(...)
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93 " 3.1. Setup {{{2
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94 " ----------
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95 " For the current line, use the first argument if given, else v:lnum
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96 let clnum = a:0 ? a:1 : v:lnum
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97
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98 " Set up variables for restoring position in file. Could use clnum here.
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99 let vcol = col('.')
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100
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101 " 3.2. Work on the current line {{{2
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102 " -----------------------------
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103
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104 " Get the current line.
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105 let line = getline(clnum)
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106 let ind = -1
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107
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108 " If we got a closing bracket on an empty line, find its match and indent
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109 " according to it.
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110 let col = matchend(line, '^\s*[]}]')
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111
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112 if col > 0 && !s:IsInString(clnum, col)
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113 call cursor(clnum, col)
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114 let bs = strpart('{}[]', stridx('}]', line[col - 1]) * 2, 2)
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115
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116 let pairstart = escape(bs[0], '[')
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117 let pairend = escape(bs[1], ']')
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118 let pairline = searchpair(pairstart, '', pairend, 'bW')
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119
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120 if pairline > 0
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121 let ind = indent(pairline)
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122 else
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123 let ind = virtcol('.') - 1
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124 endif
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125
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126 return ind
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127 endif
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128
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129 " If we are in a multi-line string, don't do anything to it.
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130 if s:IsInString(clnum, matchend(line, '^\s*') + 1)
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131 return indent('.')
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132 endif
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133
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134 " 3.3. Work on the previous line. {{{2
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135 " -------------------------------
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136
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137 let lnum = prevnonblank(clnum - 1)
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138
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139 if lnum == 0
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140 return 0
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141 endif
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142
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143 " Set up variables for current line.
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144 let line = getline(lnum)
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145 let ind = indent(lnum)
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146
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147 " If the previous line ended with a block opening, add a level of indent.
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148 " if s:Match(lnum, s:block_regex)
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149 " return indent(lnum) + shiftwidth()
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150 " endif
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151
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152 " If the previous line contained an opening bracket, and we are still in it,
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153 " add indent depending on the bracket type.
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154 if line =~ '[[({]'
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155 let counts = s:LineHasOpeningBrackets(lnum)
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156 if counts[0] == '1' || counts[1] == '1' || counts[2] == '1'
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157 return ind + shiftwidth()
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158 else
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159 call cursor(clnum, vcol)
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160 end
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161 endif
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162
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163 " }}}2
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164
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165 return ind
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166 endfunction
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167
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168 " }}}1
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169
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170 let &cpo = s:cpo_save
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171 unlet s:cpo_save
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172
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173 " vim:set sw=2 sts=2 ts=8 noet: