1" Vim indent file 2" Language: Python 3" Maintainer: Bram Moolenaar <[email protected]> 4" Original Author: David Bustos <[email protected]> 5" Last Change: 2003 Sep 08 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 25let s:maxoff = 50 " maximum number of lines to look backwards for () 26 27function GetPythonIndent(lnum) 28 " If this line is explicitly joined: If the previous line was also joined, 29 " line it up with that one, otherwise add two 'shiftwidth' 30 if getline(a:lnum - 1) =~ '\\$' 31 if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$' 32 return indent(a:lnum - 1) 33 endif 34 return indent(a:lnum - 1) + (&sw * 2) 35 endif 36 37 " If the start of the line is in a string don't change the indent. 38 if has('syntax_items') 39 \ && synIDattr(synID(a:lnum, 1, 1), "name") == "pythonString" 40 return -1 41 endif 42 43 " Search backwards for the previous non-empty line. 44 let plnum = prevnonblank(v:lnum - 1) 45 46 if plnum == 0 47 " This is the first non-empty line, use zero indent. 48 return 0 49 endif 50 51 " If the previous line is inside parenthesis, use the indent of the starting 52 " line. 53 " Trick: use the non-existing "dummy" variable to break out of the loop when 54 " going too far back. 55 call cursor(plnum, 1) 56 let parlnum = searchpair('(', '', ')', 'nbW', 57 \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" 58 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 59 \ . " =~ 'python\\(Comment\\|String\\)'") 60 if parlnum > 0 61 let plindent = indent(parlnum) 62 let plnumstart = parlnum 63 else 64 let plindent = indent(plnum) 65 let plnumstart = plnum 66 endif 67 68 69 " When inside parenthesis: If at the first line below the parenthesis add 70 " two 'shiftwidth', otherwise same as previous line. 71 " i = (a 72 " + b 73 " + c) 74 call cursor(a:lnum, 1) 75 let p = searchpair('(', '', ')', 'bW', 76 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 77 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 78 \ . " =~ 'python\\(Comment\\|String\\)'") 79 if p > 0 80 if p == plnum 81 " When the start is inside parenthesis, only indent one 'shiftwidth'. 82 let pp = searchpair('(', '', ')', 'bW', 83 \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" 84 \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" 85 \ . " =~ 'python\\(Comment\\|String\\)'") 86 if pp > 0 87 return indent(plnum) + &sw 88 endif 89 return indent(plnum) + (&sw * 2) 90 endif 91 if plnumstart == p 92 return indent(plnum) 93 endif 94 return plindent 95 endif 96 97 98 " Get the line and remove a trailing comment. 99 " Use syntax highlighting attributes when possible. 100 let pline = getline(plnum) 101 let pline_len = strlen(pline) 102 let col = 0 103 while col < pline_len 104 if pline[col] == '#' && (!has('syntax_items') 105 \ || synIDattr(synID(plnum, col + 1, 1), "name") == "pythonComment") 106 let pline = strpart(pline, 0, col) 107 break 108 endif 109 let col = col + 1 110 endwhile 111 112 " If the previous line ended with a colon, indent this line 113 if pline =~ ':\s*$' 114 return plindent + &sw 115 endif 116 117 " If the previous line was a stop-execution statement... 118 if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\)\>' 119 " See if the user has already dedented 120 if indent(a:lnum) > indent(plnum) - &sw 121 " If not, recommend one dedent 122 return indent(plnum) - &sw 123 endif 124 " Otherwise, trust the user 125 return -1 126 endif 127 128 " If the current line begins with a keyword that lines up with "try" 129 if getline(a:lnum) =~ '^\s*\(except\|finally\)\>' 130 let lnum = a:lnum - 1 131 while lnum >= 1 132 echomsg 'got here' 133 if getline(lnum) =~ '^\s*\(try\|except\)\>' 134 let ind = indent(lnum) 135 echomsg 'got here, indent is ' . ind 136 if ind >= indent(a:lnum) 137 return -1 " indent is already less than this 138 endif 139 return ind " line up with previous try or except 140 endif 141 let lnum = lnum - 1 142 endwhile 143 echomsg 'got to the end' 144 return -1 " no matching "try"! 145 endif 146 147 " If the current line begins with a header keyword, dedent 148 if getline(a:lnum) =~ '^\s*\(elif\|else\)\>' 149 150 " Unless the previous line was a one-liner 151 if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>' 152 return plindent 153 endif 154 155 " Or the user has already dedented 156 if indent(a:lnum) <= plindent - &sw 157 return -1 158 endif 159 160 return plindent - &sw 161 endif 162 163 " When after a () construct we probably want to go back to the start line. 164 " a = (b 165 " + c) 166 " here 167 if parlnum > 0 168 return plindent 169 endif 170 171 return -1 172 173endfunction 174 175" vim:sw=2 176