420 lines
11 KiB
VimL
420 lines
11 KiB
VimL
if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
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" Vim indent file
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" Language: Python
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" Maintainer: Bram Moolenaar <Bram@vim.org>
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" Original Author: David Bustos <bustos@caltech.edu>
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" Last Change: 2013 Jul 9
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" Only load this indent file when no other was loaded.
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if exists("b:did_indent")
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finish
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endif
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let b:did_indent = 1
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" Some preliminary settings
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setlocal nolisp " Make sure lisp indenting doesn't supersede us
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setlocal autoindent " indentexpr isn't much help otherwise
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setlocal indentexpr=GetPythonIndent(v:lnum)
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setlocal indentkeys+=<:>,=elif,=except
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" Only define the function once.
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if exists("*GetPythonIndent")
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finish
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endif
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let s:keepcpo= &cpo
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set cpo&vim
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" Come here when loading the script the first time.
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let s:maxoff = 50 " maximum number of lines to look backwards for ()
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function GetPythonIndent(lnum)
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" If this line is explicitly joined: If the previous line was also joined,
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" line it up with that one, otherwise add two 'shiftwidth'
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if getline(a:lnum - 1) =~ '\\$'
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if a:lnum > 1 && getline(a:lnum - 2) =~ '\\$'
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return indent(a:lnum - 1)
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endif
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return indent(a:lnum - 1) + (exists("g:pyindent_continue") ? eval(g:pyindent_continue) : (shiftwidth() * 2))
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endif
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" If the start of the line is in a string don't change the indent.
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if has('syntax_items')
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\ && synIDattr(synID(a:lnum, 1, 1), "name") =~ "String$"
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return -1
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endif
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" Search backwards for the previous non-empty line.
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let plnum = prevnonblank(v:lnum - 1)
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if plnum == 0
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" This is the first non-empty line, use zero indent.
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return 0
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endif
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" If the previous line is inside parenthesis, use the indent of the starting
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" line.
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" Trick: use the non-existing "dummy" variable to break out of the loop when
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" going too far back.
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call cursor(plnum, 1)
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let parlnum = searchpair('(\|{\|\[', '', ')\|}\|\]', 'nbW',
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\ "line('.') < " . (plnum - s:maxoff) . " ? dummy :"
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\ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
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\ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
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if parlnum > 0
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let plindent = indent(parlnum)
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let plnumstart = parlnum
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else
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let plindent = indent(plnum)
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let plnumstart = plnum
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endif
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" When inside parenthesis: If at the first line below the parenthesis add
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" two 'shiftwidth', otherwise same as previous line.
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" i = (a
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" + b
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" + c)
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call cursor(a:lnum, 1)
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let p = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
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\ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
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\ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
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\ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
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if p > 0
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if p == plnum
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" When the start is inside parenthesis, only indent one 'shiftwidth'.
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let pp = searchpair('(\|{\|\[', '', ')\|}\|\]', 'bW',
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\ "line('.') < " . (a:lnum - s:maxoff) . " ? dummy :"
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\ . " synIDattr(synID(line('.'), col('.'), 1), 'name')"
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\ . " =~ '\\(Comment\\|Todo\\|String\\)$'")
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if pp > 0
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return indent(plnum) + (exists("g:pyindent_nested_paren") ? eval(g:pyindent_nested_paren) : shiftwidth())
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endif
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return indent(plnum) + (exists("g:pyindent_open_paren") ? eval(g:pyindent_open_paren) : (shiftwidth() * 2))
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endif
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if plnumstart == p
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return indent(plnum)
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endif
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return plindent
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endif
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" Get the line and remove a trailing comment.
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" Use syntax highlighting attributes when possible.
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let pline = getline(plnum)
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let pline_len = strlen(pline)
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if has('syntax_items')
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" If the last character in the line is a comment, do a binary search for
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" the start of the comment. synID() is slow, a linear search would take
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" too long on a long line.
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if synIDattr(synID(plnum, pline_len, 1), "name") =~ "\\(Comment\\|Todo\\)$"
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let min = 1
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let max = pline_len
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while min < max
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let col = (min + max) / 2
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if synIDattr(synID(plnum, col, 1), "name") =~ "\\(Comment\\|Todo\\)$"
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let max = col
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else
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let min = col + 1
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endif
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endwhile
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let pline = strpart(pline, 0, min - 1)
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endif
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else
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let col = 0
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while col < pline_len
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if pline[col] == '#'
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let pline = strpart(pline, 0, col)
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break
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endif
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let col = col + 1
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endwhile
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endif
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" If the previous line ended with a colon, indent this line
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if pline =~ ':\s*$'
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return plindent + shiftwidth()
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endif
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" If the previous line was a stop-execution statement...
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if getline(plnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>'
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" See if the user has already dedented
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if indent(a:lnum) > indent(plnum) - shiftwidth()
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" If not, recommend one dedent
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return indent(plnum) - shiftwidth()
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endif
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" Otherwise, trust the user
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return -1
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endif
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" If the current line begins with a keyword that lines up with "try"
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if getline(a:lnum) =~ '^\s*\(except\|finally\)\>'
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let lnum = a:lnum - 1
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while lnum >= 1
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if getline(lnum) =~ '^\s*\(try\|except\)\>'
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let ind = indent(lnum)
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if ind >= indent(a:lnum)
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return -1 " indent is already less than this
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endif
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return ind " line up with previous try or except
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endif
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let lnum = lnum - 1
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endwhile
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return -1 " no matching "try"!
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endif
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" If the current line begins with a header keyword, dedent
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if getline(a:lnum) =~ '^\s*\(elif\|else\)\>'
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" Unless the previous line was a one-liner
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if getline(plnumstart) =~ '^\s*\(for\|if\|try\)\>'
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return plindent
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endif
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" Or the user has already dedented
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if indent(a:lnum) <= plindent - shiftwidth()
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return -1
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endif
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return plindent - shiftwidth()
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endif
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" When after a () construct we probably want to go back to the start line.
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" a = (b
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" + c)
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" here
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if parlnum > 0
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return plindent
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endif
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return -1
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endfunction
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let &cpo = s:keepcpo
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unlet s:keepcpo
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" vim:sw=2
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endif
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if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'python') == -1
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" PEP8 compatible Python indent file
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" Only load this indent file when no other was loaded.
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if exists("b:did_indent")
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finish
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endif
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let b:did_indent = 1
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setlocal expandtab
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setlocal nolisp
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setlocal autoindent
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setlocal indentexpr=GetPythonPEPIndent(v:lnum)
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setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except
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let s:maxoff = 50
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" Find backwards the closest open parenthesis/bracket/brace.
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function! s:SearchParensPair()
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let line = line('.')
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let col = col('.')
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" Skip strings and comments and don't look too far
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let skip = "line('.') < " . (line - s:maxoff) . " ? dummy :" .
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\ 'synIDattr(synID(line("."), col("."), 0), "name") =~? ' .
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\ '"string\\|comment"'
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" Search for parentheses
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call cursor(line, col)
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let parlnum = searchpair('(', '', ')', 'bW', skip)
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let parcol = col('.')
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" Search for brackets
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call cursor(line, col)
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let par2lnum = searchpair('\[', '', '\]', 'bW', skip)
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let par2col = col('.')
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" Search for braces
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call cursor(line, col)
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let par3lnum = searchpair('{', '', '}', 'bW', skip)
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let par3col = col('.')
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" Get the closest match
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if par2lnum > parlnum || (par2lnum == parlnum && par2col > parcol)
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let parlnum = par2lnum
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let parcol = par2col
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endif
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if par3lnum > parlnum || (par3lnum == parlnum && par3col > parcol)
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let parlnum = par3lnum
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let parcol = par3col
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endif
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" Put the cursor on the match
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if parlnum > 0
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call cursor(parlnum, parcol)
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endif
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return parlnum
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endfunction
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" Find the start of a multi-line statement
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function! s:StatementStart(lnum)
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let lnum = a:lnum
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while 1
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if getline(lnum - 1) =~ '\\$'
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let lnum = lnum - 1
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else
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call cursor(lnum, 1)
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let maybe_lnum = s:SearchParensPair()
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if maybe_lnum < 1
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return lnum
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else
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let lnum = maybe_lnum
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endif
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endif
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endwhile
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endfunction
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" Find the block starter that matches the current line
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function! s:BlockStarter(lnum, block_start_re)
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let lnum = a:lnum
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let maxindent = 10000 " whatever
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while lnum > 1
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let lnum = prevnonblank(lnum - 1)
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if indent(lnum) < maxindent
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if getline(lnum) =~ a:block_start_re
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return lnum
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else
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let maxindent = indent(lnum)
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" It's not worth going further if we reached the top level
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if maxindent == 0
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return -1
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endif
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endif
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endif
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endwhile
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return -1
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endfunction
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function! GetPythonPEPIndent(lnum)
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let scol = col('.')
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" First line has indent 0
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if a:lnum == 1
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return 0
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endif
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" If we can find an open parenthesis/bracket/brace, line up with it.
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call cursor(a:lnum, 1)
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let parlnum = s:SearchParensPair()
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if parlnum > 0
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let parcol = col('.')
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let matches = matchlist(getline(a:lnum), '^\(\s*\)[])}]')
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if len(matches) == 0
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let closing_paren = 0
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let closing_paren_pos = 0
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else
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let closing_paren = 1
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let closing_paren_pos = len(matches[1])
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endif
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if match(getline(parlnum), '[([{]\s*$', parcol - 1) != -1
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if closing_paren
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return indent(parlnum)
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else
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return indent(parlnum) + &shiftwidth
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endif
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elseif a:lnum - 1 != parlnum
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if closing_paren && closing_paren_pos > scol
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return indent(parlnum)
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else
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let lastindent = match(getline(a:lnum - 1), '\S')
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if lastindent != -1 && lastindent < parcol
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return lastindent
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endif
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endif
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endif
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" If we line up with an opening column there is a special case
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" we want to handle: a docstring as argument. In that case we
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" don't want to line up with the paren but with the statement
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" imagine foo(doc=""" as example
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echo getline(parlnum)
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if match(getline(parlnum), '\("""\|' . "'''" . '\)\s*$') != -1
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return indent(parlnum)
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endif
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return parcol
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endif
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" Examine this line
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let thisline = getline(a:lnum)
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let thisindent = indent(a:lnum)
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" If the line starts with 'elif' or 'else', line up with 'if' or 'elif'
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if thisline =~ '^\s*\(elif\|else\)\>'
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let bslnum = s:BlockStarter(a:lnum, '^\s*\(if\|elif\)\>')
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if bslnum > 0
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return indent(bslnum)
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else
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return -1
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endif
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endif
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" If the line starts with 'except' or 'finally', line up with 'try'
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" or 'except'
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if thisline =~ '^\s*\(except\|finally\)\>'
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let bslnum = s:BlockStarter(a:lnum, '^\s*\(try\|except\)\>')
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if bslnum > 0
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return indent(bslnum)
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else
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return -1
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endif
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endif
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" Examine previous line
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let plnum = a:lnum - 1
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let pline = getline(plnum)
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let sslnum = s:StatementStart(plnum)
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" If the previous line is blank, keep the same indentation
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if pline =~ '^\s*$'
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return -1
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endif
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" If this line is explicitly joined, try to find an indentation that looks
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" good.
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if pline =~ '\\$'
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let compound_statement = '^\s*\(if\|while\|from\|import\|for\s.*\sin\|except\)\s*'
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let maybe_indent = matchend(getline(sslnum), compound_statement)
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if maybe_indent != -1
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return maybe_indent
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else
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return indent(sslnum) + &sw * 2
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endif
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endif
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" If the previous line ended with a colon and is not a comment, indent
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" relative to statement start.
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if pline =~ '^[^#]*:\s*\(#.*\)\?$'
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return indent(sslnum) + &sw
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endif
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" If the previous line was a stop-execution statement or a pass
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if getline(sslnum) =~ '^\s*\(break\|continue\|raise\|return\|pass\)\>'
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" See if the user has already dedented
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if indent(a:lnum) > indent(sslnum) - &sw
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" If not, recommend one dedent
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return indent(sslnum) - &sw
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endif
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" Otherwise, trust the user
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return -1
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endif
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" In all other cases, line up with the start of the previous statement.
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return indent(sslnum)
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endfunction
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endif
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