1" Vim indent file 2" Language: Python 3" Maintainer: Bram Moolenaar <[email protected]> 4" Original Author: David Bustos <[email protected]> 5" Last Change: 2006 Mar 26 6 7" Only load this indent file when no other was loaded. 8if exists("b:did_indent") 9 finish 10endif 11let b:did_indent = 1 12 13" Some preliminary settings 14setlocal nolisp " Make sure lisp indenting doesn't supersede us 15setlocal autoindent " indentexpr isn't much help otherwise 16 17setlocal indentexpr=GetPythonIndent(v:lnum) 18setlocal indentkeys+=<:>,=elif,=except 19 20" Only define the function once. 21if exists("*GetPythonIndent") 22 finish 23endif 24 25" Come here when loading the script the first time. 26 27let s:maxoff = 50 " maximum number of lines to look backwards for () 28 29function GetPythonIndent(lnum) 30 31 " If this line is explicitly joined: If the previous line was also joined, 32 " line it up with that one, otherwise add two 'shiftwidth' 33 if getline(a:lnum - 1) =~ '\\$' 34 if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$' 35 return indent(a:lnum - 1) 36 endif 37 return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (&sw * 2)) 38 endif 39 40 " If the start of the line is in a string don't change the indent. 41 if has('syntax_items') 42 \ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$" 43 return -1 44 endif 45 46 " Search backwards for the previous non-empty line. 47 let plnum = prevnonblank(v:lnum - 1) 48 49 if plnum == 0 50 " This is the first non-empty line, use zero indent. 51 return 0 52 endif 53 54 " If the previous line is inside parenthesis, use the indent of the starting 55 " line. 56 " Trick: use the non-existing "dummy" variable to break out of the loop when 57 " going too far back. 58 call cursor(plnum, 1) 59 let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW', 60 \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" 61 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 62 \ . " =~ '\\(Comment\\|String\\)$'") 63 if parlnum > 0 64 let plindent = indent(parlnum) 65 let plnumstart = parlnum 66 else 67 let plindent = indent(plnum) 68 let plnumstart = plnum 69 endif 70 71 72 " When inside parenthesis: If at the first line below the parenthesis add 73 " two 'shiftwidth', otherwise same as previous line. 74 " i = (a 75 " + b 76 " + c) 77 call cursor(a:lnum, 1) 78 let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', 79 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 80 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 81 \ . " =~ '\\(Comment\\|String\\)$'") 82 if p > 0 83 if p == plnum 84 " When the start is inside parenthesis, only indent one 'shiftwidth'. 85 let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', 86 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 87 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 88 \ . " =~ '\\(Comment\\|String\\)$'") 89 if pp > 0 90 return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : &sw) 91 endif 92 return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (&sw * 2)) 93 endif 94 if plnumstart == p 95 return indent(plnum) 96 endif 97 return plindent 98 endif 99 100 101 " Get the line and remove a trailing comment. 102 " Use syntax highlighting attributes when possible. 103 let pline = getline(plnum) 104 let pline_len = strlen(pline) 105 if has('syntax_items') 106 " If the last character in the line is a comment, do a binary search for 107 " the start of the comment. synID() is slow, a linear search would take 108 " too long on a long line. 109 if synIDattr(synID(plnum, pline_len, 1), "name") =~ "Comment$" 110 let min = 1 111 let max = pline_len 112 while min < max 113 let col = (min + max) / 2 114 if synIDattr(synID(plnum, col, 1), "name") =~ "Comment$" 115 let max = col 116 else 117 let min = col + 1 118 endif 119 endwhile 120 let pline = strpart(pline, 0, min - 1) 121 endif 122 else 123 let col = 0 124 while col < pline_len 125 if pline[col] == '#' 126 let pline = strpart(pline, 0, col) 127 break 128 endif 129 let col = col + 1 130 endwhile 131 endif 132 133 " If the previous line ended with a colon, indent this line 134 if pline =~ ':\s*$' 135 return plindent + &sw 136 endif 137 138 " If the previous line was a stop-execution statement... 139 if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\)\>' 140 " See if the user has already dedented 141 if indent(a:lnum) > indent(plnum) - &sw 142 " If not, recommend one dedent 143 return indent(plnum) - &sw 144 endif 145 " Otherwise, trust the user 146 return -1 147 endif 148 149 " If the current line begins with a keyword that lines up with "try" 150 if getline(a:lnum) =~ '^\s*\(except\|finally\)\>' 151 let lnum = a:lnum - 1 152 while lnum >= 1 153 if getline(lnum) =~ '^\s*\(try\|except\)\>' 154 let ind = indent(lnum) 155 if ind >= indent(a:lnum) 156 return -1 " indent is already less than this 157 endif 158 return ind " line up with previous try or except 159 endif 160 let lnum = lnum - 1 161 endwhile 162 return -1 " no matching "try"! 163 endif 164 165 " If the current line begins with a header keyword, dedent 166 if getline(a:lnum) =~ '^\s*\(elif\|else\)\>' 167 168 " Unless the previous line was a one-liner 169 if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>' 170 return plindent 171 endif 172 173 " Or the user has already dedented 174 if indent(a:lnum) <= plindent - &sw 175 return -1 176 endif 177 178 return plindent - &sw 179 endif 180 181 " When after a () construct we probably want to go back to the start line. 182 " a = (b 183 " + c) 184 " here 185 if parlnum > 0 186 return plindent 187 endif 188 189 return -1 190 191endfunction 192 193" vim:sw=2 194