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Diffstat (limited to 'runtime/indent/python.vim')
| -rw-r--r-- | runtime/indent/python.vim | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/runtime/indent/python.vim b/runtime/indent/python.vim new file mode 100644 index 000000000..3dbbe10a6 --- /dev/null +++ b/runtime/indent/python.vim @@ -0,0 +1,175 @@ +" Vim indent file +" Language: Python +" Maintainer: Bram Moolenaar <Bram@vim.org> +" Original Author: David Bustos <bustos@caltech.edu> +" Last Change: 2003 Sep 08 + +" 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: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) + (&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") == "pythonString" + 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')" + \ . " =~ 'python\\(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')" + \ . " =~ 'python\\(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')" + \ . " =~ 'python\\(Comment\\|String\\)'") + if pp > 0 + return indent(plnum) + &sw + endif + return indent(plnum) + (&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) + let col = 0 + while col < pline_len + if pline[col] == '#' && (!has('syntax_items') + \ || synIDattr(synID(plnum, col + 1, 1), "name") == "pythonComment") + let pline = strpart(pline, 0, col) + break + endif + let col = col + 1 + endwhile + + " 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 + echomsg 'got here' + if getline(lnum) =~ '^\s*\(try\|except\)\>' + let ind = indent(lnum) + echomsg 'got here, indent is ' . ind + 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 + echomsg 'got to the end' + 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 |