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python.vim
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" Vim indent file " Language: Python " Maintainer: Bram Moolenaar <Bram@vim.org> " Original Author: David Bustos <bustos@caltech.edu> " Last Change: 2013 Jul 9 " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 " Some preliminary settings setlocal nolisp " Make sure lisp indenting doesn't supersede us setlocal autoindent " indentexpr isn't much help otherwise setlocal indentexpr=GetPythonIndent(v:lnum) setlocal indentkeys+=<:>,=elif,=except " Only define the function once. if exists("*GetPythonIndent") finish endif let s:keepcpo= &cpo set cpo&vim " Come here when loading the script the first time. let s:maxoff = 50 " maximum number of lines to look backwards for () function GetPythonIndent(lnum) " If this line is explicitly joined: If the previous line was also joined, " line it up with that one, otherwise add two 'shiftwidth' if getline(a:lnum - 1) =~ '\\$' if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$' return indent(a:lnum - 1) endif return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (shiftwidth() * 2)) endif " If the start of the line is in a string don't change the indent. if has('syntax_items') \ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$" return -1 endif " Search backwards for the previous non-empty line. let plnum = prevnonblank(v:lnum - 1) if plnum == 0 " This is the first non-empty line, use zero indent. return 0 endif " If the previous line is inside parenthesis, use the indent of the starting " line. " Trick: use the non-existing "dummy" variable to break out of the loop when " going too far back. call cursor(plnum, 1) let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW', \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if parlnum > 0 let plindent = indent(parlnum) let plnumstart = parlnum else let plindent = indent(plnum) let plnumstart = plnum endif " When inside parenthesis: If at the first line below the parenthesis add " two 'shiftwidth', otherwise same as previous line. " i = (a " + b " + c) call cursor(a:lnum, 1) let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if p > 0 if p == plnum " When the start is inside parenthesis, only indent one 'shiftwidth'. let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW', \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" \ . " =~ '\\(Comment\\|Todo\\|String\\)$'") if pp > 0 return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth()) endif return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (shiftwidth() * 2)) endif if plnumstart == p return indent(plnum) endif return plindent endif " Get the line and remove a trailing comment. " Use syntax highlighting attributes when possible. let pline = getline(plnum) let pline_len = strlen(pline) if has('syntax_items') " If the last character in the line is a comment, do a binary search for " the start of the comment. synID() is slow, a linear search would take " too long on a long line. if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$" let min = 1 let max = pline_len while min < max let col = (min + max) / 2 if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$" let max = col else let min = col + 1 endif endwhile let pline = strpart(pline, 0, min - 1) endif else let col = 0 while col < pline_len if pline[col] == '#' let pline = strpart(pline, 0, col) break endif let col = col + 1 endwhile endif " If the previous line ended with a colon, indent this line if pline =~ ':\s*$' return plindent + shiftwidth() endif " If the previous line was a stop-execution statement... if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>' " See if the user has already dedented if indent(a:lnum) > indent(plnum) - shiftwidth() " If not, recommend one dedent return indent(plnum) - shiftwidth() endif " Otherwise, trust the user return -1 endif " If the current line begins with a keyword that lines up with "try" if getline(a:lnum) =~ '^\s*\(except\|finally\)\>' let lnum = a:lnum - 1 while lnum >= 1 if getline(lnum) =~ '^\s*\(try\|except\)\>' let ind = indent(lnum) if ind >= indent(a:lnum) return -1 " indent is already less than this endif return ind " line up with previous try or except endif let lnum = lnum - 1 endwhile return -1 " no matching "try"! endif " If the current line begins with a header keyword, dedent if getline(a:lnum) =~ '^\s*\(elif\|else\)\>' " Unless the previous line was a one-liner if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>' return plindent endif " Or the user has already dedented if indent(a:lnum) <= plindent - shiftwidth() return -1 endif return plindent - shiftwidth() endif " When after a () construct we probably want to go back to the start line. " a = (b " + c) " here if parlnum > 0 return plindent endif return -1 endfunction let &cpo = s:keepcpo unlet s:keepcpo " vim:sw=2