meson.vim (5319B)
1 " Vim indent file 2 " Language: Meson 3 " License: VIM License 4 " Maintainer: Nirbheek Chauhan <nirbheek.chauhan@gmail.com> 5 " Liam Beguin <liambeguin@gmail.com> 6 " Original Authors: David Bustos <bustos@caltech.edu> 7 " Bram Moolenaar <Bram@vim.org> 8 " Last Change: 2019 Oct 18 9 10 " Only load this indent file when no other was loaded. 11 if exists("b:did_indent") 12 finish 13 endif 14 let b:did_indent = 1 15 16 " Some preliminary settings 17 setlocal nolisp " Make sure lisp indenting doesn't supersede us 18 setlocal autoindent " indentexpr isn't much help otherwise 19 20 setlocal indentexpr=GetMesonIndent(v:lnum) 21 setlocal indentkeys+==elif,=else,=endforeach,=endif,0) 22 23 let b:undo_indent = "setl ai< inde< indk< lisp<" 24 25 " Only define the function once. 26 if exists("*GetMesonIndent") 27 finish 28 endif 29 let s:keepcpo= &cpo 30 set cpo&vim 31 32 " Come here when loading the script the first time. 33 34 let s:maxoff = 50 " maximum number of lines to look backwards for () 35 36 function GetMesonIndent(lnum) 37 echom getline(line(".")) 38 39 " If this line is explicitly joined: If the previous line was also joined, 40 " line it up with that one, otherwise add two 'shiftwidth' 41 if getline(a:lnum - 1) =~ '\\$' 42 if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$' 43 return indent(a:lnum - 1) 44 endif 45 return indent(a:lnum - 1) + (exists("g:mesonindent_continue") ? eval(g:mesonindent_continue) : (shiftwidth() * 2)) 46 endif 47 48 " If the start of the line is in a string don't change the indent. 49 if has('syntax_items') 50 \ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$" 51 return -1 52 endif 53 54 " Search backwards for the previous non-empty line. 55 let plnum = prevnonblank(v:lnum - 1) 56 57 if plnum == 0 58 " This is the first non-empty line, use zero indent. 59 return 0 60 endif 61 62 " If the previous line is inside parenthesis, use the indent of the starting 63 " line. 64 " Trick: use the non-existing "dummy" variable to break out of the loop when 65 " going too far back. 66 call cursor(plnum, 1) 67 let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW', 68 \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" 69 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 70 \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") 71 if parlnum > 0 72 let plindent = indent(parlnum) 73 let plnumstart = parlnum 74 else 75 let plindent = indent(plnum) 76 let plnumstart = plnum 77 endif 78 79 80 " When inside parenthesis: If at the first line below the parenthesis add 81 " a 'shiftwidth', otherwise same as previous line. 82 " i = (a 83 " + b 84 " + c) 85 call cursor(a:lnum, 1) 86 let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', 87 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 88 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 89 \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") 90 if p > 0 91 if p == plnum 92 " When the start is inside parenthesis, only indent one 'shiftwidth'. 93 let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', 94 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 95 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 96 \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") 97 if pp > 0 98 return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth()) 99 endif 100 return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : shiftwidth()) 101 endif 102 if plnumstart == p 103 return indent(plnum) 104 endif 105 return plindent 106 endif 107 108 109 " Get the line and remove a trailing comment. 110 " Use syntax highlighting attributes when possible. 111 let pline = getline(plnum) 112 let pline_len = strlen(pline) 113 if has('syntax_items') 114 " If the last character in the line is a comment, do a binary search for 115 " the start of the comment. synID() is slow, a linear search would take 116 " too long on a long line. 117 if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$" 118 let min = 1 119 let max = pline_len 120 while min < max 121 let col = (min + max) / 2 122 if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$" 123 let max = col 124 else 125 let min = col + 1 126 endif 127 endwhile 128 let pline = strpart(pline, 0, min - 1) 129 endif 130 else 131 let col = 0 132 while col < pline_len 133 if pline[col] == '#' 134 let pline = strpart(pline, 0, col) 135 break 136 endif 137 let col = col + 1 138 endwhile 139 endif 140 141 " If the previous line ended the conditional/loop 142 if getline(plnum) =~ '^\s*\(endif\|endforeach\)\>\s*' 143 " Maintain indent 144 return -1 145 endif 146 147 " If the previous line ended with a builtin, indent this line 148 if pline =~ '^\s*\(foreach\|if\|else\|elif\)\>\s*' 149 return plindent + shiftwidth() 150 endif 151 152 " If the current line begins with a header keyword, deindent 153 if getline(a:lnum) =~ '^\s*\(else\|elif\|endif\|endforeach\)' 154 155 " Unless the previous line was a one-liner 156 if getline(plnumstart) =~ '^\s*\(foreach\|if\)\>\s*' 157 return plindent 158 endif 159 160 " Or the user has already dedented 161 if indent(a:lnum) <= plindent - shiftwidth() 162 return -1 163 endif 164 165 return plindent - shiftwidth() 166 endif 167 168 " When after a () construct we probably want to go back to the start line. 169 " a = (b 170 " + c) 171 " here 172 if parlnum > 0 173 return plindent 174 endif 175 176 return -1 177 178 endfunction 179 180 let &cpo = s:keepcpo 181 unlet s:keepcpo 182 183 " vim:sw=2