| " Vim indent file |
| " Language: Python |
| " Maintainer: Bram Moolenaar <Bram@vim.org> |
| " Original Author: David Bustos <bustos@caltech.edu> |
| " Last Change: 2006 Mar 26 |
| |
| " 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 |
| |
| " 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) : (&sw * 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$" |
| return -1 |
| endif |
| |
| " Search backwards for the previous non-empty line. |
| let plnum = prevnonblank(v:lnum - 1) |
| |
| if plnum == 0 |
| " This is the first non-empty line, use zero indent. |
| return 0 |
| endif |
| |
| " If the previous line is inside parenthesis, use the indent of the starting |
| " line. |
| " Trick: use the non-existing "dummy" variable to break out of the loop when |
| " going too far back. |
| call cursor(plnum, 1) |
| let parlnum = searchpair('(', '', ')', 'nbW', |
| \ "line('.') < " . (plnum - s:maxoff) . " ? dummy :" |
| \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" |
| \ . " =~ '\\(Comment\\|String\\)$'") |
| 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\\|String\\)$'") |
| if p > 0 |
| if p == plnum |
| " When the start is inside parenthesis, only indent one 'shiftwidth'. |
| let pp = searchpair('(', '', ')', 'bW', |
| \ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :" |
| \ . " synIDattr(synID(line('.'), col('.'), 1), 'name')" |
| \ . " =~ '\\(Comment\\|String\\)$'") |
| if pp > 0 |
| return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : &sw) |
| endif |
| return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (&sw * 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$" |
| let min = 1 |
| let max = pline_len |
| while min < max |
| let col = (min + max) / 2 |
| if synIDattr(synID(plnum, col, 1), "name") =~ "Comment$" |
| 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 + &sw |
| endif |
| |
| " If the previous line was a stop-execution statement... |
| if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\)\>' |
| " See if the user has already dedented |
| if indent(a:lnum) > indent(plnum) - &sw |
| " If not, recommend one dedent |
| return indent(plnum) - &sw |
| 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 - &sw |
| return -1 |
| endif |
| |
| return plindent - &sw |
| 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 |
| |
| " vim:sw=2 |
