" PEP8 compatible Python indent file
" Language: Python
-" Maintainer: Hynek Schlawack <hs@ox.cx>
+" Maintainer: Daniel Hahler <https://daniel.hahler.de/>
+" Prev Maintainer: Hynek Schlawack <hs@ox.cx>
" Prev Maintainer: Eric Mc Sween <em@tomcom.de> (address invalid)
" Original Author: David Bustos <bustos@caltech.edu> (address invalid)
" License: CC0
" Written in 2004 by David Bustos <bustos@caltech.edu>
" Maintained from 2004-2005 by Eric Mc Sween <em@tomcom.de>
" Maintained from 2013 by Hynek Schlawack <hs@ox.cx>
+" Maintained from 2017 by Daniel Hahler <https://daniel.hahler.de/>
"
" To the extent possible under law, the author(s) have dedicated all copyright
" and related and neighboring rights to this software to the public domain
" <http://creativecommons.org/publicdomain/zero/1.0/>.
" Only load this indent file when no other was loaded.
-if exists("b:did_indent")
+if exists('b:did_indent')
finish
endif
let b:did_indent = 1
-setlocal expandtab
setlocal nolisp
setlocal autoindent
setlocal indentexpr=GetPythonPEPIndent(v:lnum)
setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except
-setlocal tabstop=4
-setlocal softtabstop=4
-setlocal shiftwidth=4
-let s:maxoff = 50
+if !exists('g:python_pep8_indent_multiline_string')
+ let g:python_pep8_indent_multiline_string = 0
+endif
+
let s:block_rules = {
\ '^\s*elif\>': ['if', 'elif'],
- \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
\ '^\s*except\>': ['try', 'except'],
\ '^\s*finally\>': ['try', 'except', 'else']
\ }
-let s:paren_pairs = ['()', '{}', '[]']
-let s:control_statement = '^\s*\(class\|def\|if\|while\|with\|for\|except\)\>'
+let s:block_rules_multiple = {
+ \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
+ \ }
+" Pairs to look for when searching for opening parenthesis.
+" The value is the maximum offset in lines.
+let s:paren_pairs = {'()': 10, '[]': 100, '{}': 1000}
+if &filetype ==# 'pyrex' || &filetype ==# 'cython'
+ let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
+else
+ let b:control_statement = '\v^\s*(class|def|if|while|with|for|except)>'
+endif
let s:stop_statement = '^\s*\(break\|continue\|raise\|return\|pass\)\>'
" Skip strings and comments. Return 1 for chars to skip.
endfunction
else
function! s:sw()
- return &sw
+ return &shiftwidth
endfunction
endif
return ret
endif
- let stopline = max([0, line('.') - s:maxoff])
-
" Return if cursor is in a comment.
exe 'if' s:skip_search '| return [0, 0] | endif'
let positions = []
- for p in s:paren_pairs
+ for [p, maxoff] in items(s:paren_pairs)
+ let stopline = max([0, line('.') - maxoff])
call add(positions, searchpairpos(
\ '\V'.p[0], '', '\V'.p[1], 'bnW', s:skip_special_chars, stopline))
endfor
function! s:find_start_of_multiline_statement(lnum)
let lnum = a:lnum
while lnum > 0
- if getline(lnum - 1) =~ '\\$'
+ if getline(lnum - 1) =~# '\\$'
let lnum = prevnonblank(lnum - 1)
else
let [paren_lnum, _] = s:find_opening_paren(lnum)
endwhile
endfunction
-" Find the block starter that matches the current line
-function! s:find_start_of_block(lnum, types)
+" Find possible indent(s) of the block starter that matches the current line.
+function! s:find_start_of_block(lnum, types, multiple)
+ let r = []
+ let types = copy(a:types)
let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>'
-
let lnum = a:lnum
let last_indent = indent(lnum) + 1
while lnum > 0 && last_indent > 0
- if indent(lnum) < last_indent
- if getline(lnum) =~# re
- return lnum
- endif
+ let indent = indent(lnum)
+ if indent < last_indent
+ for type in types
+ let re = '\v^\s*'.type.'>'
+ if getline(lnum) =~# re
+ if !a:multiple
+ return [indent]
+ endif
+ if index(r, indent) == -1
+ let r += [indent]
+ endif
+ " Remove any handled type, e.g. 'if'.
+ call remove(types, index(types, type))
+ endif
+ endfor
let last_indent = indent(lnum)
endif
let lnum = prevnonblank(lnum - 1)
endwhile
- return 0
+ return r
endfunction
" Is "expr" true for every position in "lnum", beginning at "start"?
let r = 1
for i in range(a:start, end)
call cursor(a:lnum, i)
- if !(eval(a:expr) || text[i-1] =~ '\s')
+ if !(eval(a:expr) || text[i-1] =~# '\s')
let r = 0
break
endif
let nothing_after_opening_paren = s:match_expr_on_line(
\ s:skip_after_opening_paren, paren_lnum, paren_col+1)
- let starts_with_closing_paren = getline(a:lnum) =~ '^\s*[])}]'
+ let starts_with_closing_paren = getline(a:lnum) =~# '^\s*[])}]'
if nothing_after_opening_paren
if starts_with_closing_paren
" If this line is the continuation of a control statement
" indent further to distinguish the continuation line
" from the next logical line.
- if text =~# s:control_statement && res == base + s:sw()
+ if text =~# b:control_statement && res == base + s:sw()
return base + s:sw() * 2
else
return res
" Match indent of first block of this type.
function! s:indent_like_block(lnum)
let text = getline(a:lnum)
+ for [multiple, block_rules] in [
+ \ [0, s:block_rules],
+ \ [1, s:block_rules_multiple]]
+ for [line_re, blocks] in items(block_rules)
+ if text !~# line_re
+ continue
+ endif
- for [line_re, blocks] in items(s:block_rules)
- if text !~# line_re
- continue
- endif
+ let indents = s:find_start_of_block(a:lnum - 1, blocks, multiple)
+ if !len(indents)
+ return -1
+ endif
+ if len(indents) == 1
+ return indents[0]
+ endif
- let lnum = s:find_start_of_block(a:lnum - 1, blocks)
- if lnum > 0
- return indent(lnum)
- else
- return -1
- endif
+ " Multiple valid indents, e.g. for 'else' with both try and if.
+ let indent = indent(a:lnum)
+ if index(indents, indent) != -1
+ " The indent is valid, keep it.
+ return indent
+ endif
+ " Fallback to the first/nearest one.
+ return indents[0]
+ endfor
endfor
-
return -2
endfunction
let ignore_last_char = eval(s:skip_special_chars)
" Search for final colon that is not inside something to be ignored.
- while search(':', 'bcW', lnum)
- let curpos = getpos(".")[2]
+ while 1
+ let curpos = getpos('.')[2]
if curpos == 1 | break | endif
- if eval(s:skip_special_chars)
+ if eval(s:skip_special_chars) || text[curpos-1] =~# '\s'
normal! h
continue
- endif
- if !s:match_expr_on_line(s:skip_special_chars, lnum, curpos)
+ elseif text[curpos-1] ==# ':'
return base + s:sw()
endif
- normal! h
+ break
endwhile
- if text =~ '\\$' && !ignore_last_char
+ if text =~# '\\$' && !ignore_last_char
" If this line is the continuation of a control statement
" indent further to distinguish the continuation line
" from the next logical line.
- if getline(start) =~# s:control_statement
+ if getline(start) =~# b:control_statement
return base + s:sw() * 2
endif
return base + s:sw()
endif
+ let empty = getline(a:lnum) =~# '^\s*$'
+
+ " Current and prev line are empty, next is not -> indent like next.
+ if empty && a:lnum > 1 &&
+ \ (getline(a:lnum - 1) =~# '^\s*$') &&
+ \ !(getline(a:lnum + 1) =~# '^\s*$')
+ return indent(a:lnum + 1)
+ endif
+
" If the previous statement was a stop-execution statement or a pass
if getline(start) =~# s:stop_statement
" Remove one level of indentation if the user hasn't already dedented
- if indent(a:lnum) > base - s:sw()
+ if empty || current > base - s:sw()
return base - s:sw()
endif
" Otherwise, trust the user
return -1
endif
- " If this line is dedented and the number of indent spaces is valid
- " (multiple of the indentation size), trust the user
- let dedent_size = current - base
- if dedent_size < 0 && current % s:sw() == 0
+ if !empty && s:is_dedented_already(current, base)
return -1
endif
return base
endfunction
+" If this line is dedented and the number of indent spaces is valid
+" (multiple of the indentation size), trust the user.
+function! s:is_dedented_already(current, base)
+ let dedent_size = a:current - a:base
+ return (dedent_size < 0 && a:current % s:sw() == 0) ? 1 : 0
+endfunction
+
" Is the syntax at lnum (and optionally cnum) a python string?
function! s:is_python_string(lnum, ...)
let line = getline(a:lnum)
let cols = a:0 ? type(a:1) != type([]) ? [a:1] : a:1 : range(1, linelen)
for cnum in cols
if match(map(synstack(a:lnum, cnum),
- \ 'synIDattr(v:val,"name")'), 'python\S*String') == -1
+ \ "synIDattr(v:val, 'name')"), 'python\S*String') == -1
return 0
end
endfor
endfunction
function! GetPythonPEPIndent(lnum)
-
" First line has indent 0
if a:lnum == 1
return 0
endif
+ let line = getline(a:lnum)
+ let prevline = getline(a:lnum-1)
+
" Multilinestrings: continous, docstring or starting.
- if s:is_python_string(a:lnum)
+ if s:is_python_string(a:lnum-1, len(prevline))
+ \ && (s:is_python_string(a:lnum, 1)
+ \ || match(line, '^\%("""\|''''''\)') != -1)
+
+ " Indent closing quotes as the line with the opening ones.
+ let match_quotes = match(line, '^\s*\zs\%("""\|''''''\)')
+ if match_quotes != -1
+ " closing multiline string
+ let quotes = line[match_quotes:(match_quotes+2)]
+ let pairpos = searchpairpos(quotes, '', quotes, 'b')
+ if pairpos[0] != 0
+ return indent(pairpos[0])
+ else
+ " TODO: test to cover this!
+ endif
+ endif
+
if s:is_python_string(a:lnum-1)
" Previous line is (completely) a string.
- return s:indent_like_previous_line(a:lnum)
+ return indent(a:lnum-1)
endif
- if match(getline(a:lnum-1), '^\s*\%("""\|''''''\)') != -1
+ if match(prevline, '^\s*\%("""\|''''''\)') != -1
" docstring.
- return s:indent_like_previous_line(a:lnum)
+ return indent(a:lnum-1)
endif
- if s:is_python_string(a:lnum-1, len(getline(a:lnum-1)))
- " String started in previous line.
- return 0
+ let indent_multi = get(b:, 'python_pep8_indent_multiline_string',
+ \ get(g:, 'python_pep8_indent_multiline_string', 0))
+ if match(prevline, '\v%("""|'''''')$') != -1
+ " Opening multiline string, started in previous line.
+ if (&autoindent && indent(a:lnum) == indent(a:lnum-1))
+ \ || match(line, '\v^\s+$') != -1
+ " <CR> with empty line or to split up 'foo("""bar' into
+ " 'foo("""' and 'bar'.
+ if indent_multi == -2
+ return indent(a:lnum-1) + s:sw()
+ endif
+ return indent_multi
+ endif
+ endif
+
+ " Keep existing indent.
+ if match(line, '\v^\s*\S') != -1
+ return -1
endif
+
+ if indent_multi != -2
+ return indent_multi
+ endif
+
+ return s:indent_like_opening_paren(a:lnum)
endif
" Parens: If we can find an open parenthesis/bracket/brace, line up with it.
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