All patches and comments are welcome. Please squash your changes to logical
commits before using git-format-patch and git-send-email to
patches@git.madduck.net.
If you'd read over the Git project's submission guidelines and adhered to them,
I'd be especially grateful.
1 " PEP8 compatible Python indent file
3 " Maintainer: Daniel Hahler <https://daniel.hahler.de/>
4 " Prev Maintainer: Hynek Schlawack <hs@ox.cx>
5 " Prev Maintainer: Eric Mc Sween <em@tomcom.de> (address invalid)
6 " Original Author: David Bustos <bustos@caltech.edu> (address invalid)
9 " vim-python-pep8-indent - A nicer Python indentation style for vim.
10 " Written in 2004 by David Bustos <bustos@caltech.edu>
11 " Maintained from 2004-2005 by Eric Mc Sween <em@tomcom.de>
12 " Maintained from 2013 by Hynek Schlawack <hs@ox.cx>
13 " Maintained from 2017 by Daniel Hahler <https://daniel.hahler.de/>
15 " To the extent possible under law, the author(s) have dedicated all copyright
16 " and related and neighboring rights to this software to the public domain
17 " worldwide. This software is distributed without any warranty.
18 " You should have received a copy of the CC0 Public Domain Dedication along
19 " with this software. If not, see
20 " <http://creativecommons.org/publicdomain/zero/1.0/>.
22 " Only load this indent file when no other was loaded.
23 if exists('b:did_indent')
30 setlocal indentexpr=GetPythonPEPIndent(v:lnum)
31 setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except
33 if !exists('g:python_pep8_indent_multiline_string')
34 let g:python_pep8_indent_multiline_string = 0
37 if !exists('g:python_pep8_indent_hang_closing')
38 let g:python_pep8_indent_hang_closing = 0
41 " TODO: check required patch for timeout argument, likely lower than 7.3.429 though.
42 if !exists('g:python_pep8_indent_searchpair_timeout')
43 if has('patch-8.0.1483')
44 let g:python_pep8_indent_searchpair_timeout = 150
46 let g:python_pep8_indent_searchpair_timeout = 0
51 \ '^\s*elif\>': ['if', 'elif'],
52 \ '^\s*except\>': ['try', 'except'],
53 \ '^\s*finally\>': ['try', 'except', 'else']
55 let s:block_rules_multiple = {
56 \ '^\s*else\>': ['if', 'elif', 'for', 'try', 'except'],
58 " Pairs to look for when searching for opening parenthesis.
59 " The value is the maximum offset in lines.
60 let s:paren_pairs = {'()': 50, '[]': 100, '{}': 1000}
62 if &filetype ==# 'pyrex' || &filetype ==# 'cython'
63 let b:control_statement = '\v^\s*(class|def|if|while|with|for|except|cdef|cpdef)>'
65 let b:control_statement = '\v^\s*(class|def|if|while|with|for|except)>'
67 let s:stop_statement = '^\s*\(break\|continue\|raise\|return\|pass\)\>'
69 let s:skip_after_opening_paren = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
70 \ '=~? "\\vcomment|jedi\\S"'
72 if !get(g:, 'python_pep8_indent_skip_concealed', 0) || !has('conceal')
73 " Skip strings and comments. Return 1 for chars to skip.
74 " jedi* refers to syntax definitions from jedi-vim for call signatures, which
75 " are inserted temporarily into the buffer.
76 function! s:_skip_special_chars(line, col)
77 return synIDattr(synID(a:line, a:col, 0), 'name')
78 \ =~? "\\vstring|comment|^pythonbytes%(contents)=$|jedi\\S"
81 " Also ignore anything concealed.
82 " TODO: doc; likely only necessary with jedi-vim, where a better version is
83 " planned (https://github.com/Vimjas/vim-python-pep8-indent/pull/98).
85 " Wrapper around synconcealed for older Vim (7.3.429, used on Travis CI).
86 function! s:is_concealed(line, col)
87 let concealed = synconcealed(a:line, a:col)
88 return len(concealed) && concealed[0]
91 function! s:_skip_special_chars(line, col)
92 return synIDattr(synID(a:line, a:col, 0), 'name')
93 \ =~? "\\vstring|comment|^pythonbytes%(contents)=$|jedi\\S"
94 \ || s:is_concealed(a:line, a:col)
99 " Use 'shiftwidth()' instead of '&sw'.
100 " (Since Vim patch 7.3.629, 'shiftwidth' can be set to 0 to follow 'tabstop').
101 if exists('*shiftwidth')
111 " Find backwards the closest open parenthesis/bracket/brace.
112 function! s:find_opening_paren(lnum, col)
113 " Return if cursor is in a comment.
114 if synIDattr(synID(a:lnum, a:col, 0), 'name') =~? 'comment'
118 call cursor(a:lnum, a:col)
121 let timeout = g:python_pep8_indent_searchpair_timeout
122 let skip_special_chars = 's:_skip_special_chars(line("."), col("."))'
123 for [p, maxoff] in items(s:paren_pairs)
124 let stopline = max([0, line('.') - maxoff, nearest[0]])
125 let next = searchpairpos(
126 \ '\V'.p[0], '', '\V'.p[1], 'bnW', skip_special_chars, stopline, timeout)
127 if next[0] && (next[0] > nearest[0] || (next[0] == nearest[0] && next[1] > nearest[1]))
134 " Find the start of a multi-line statement
135 function! s:find_start_of_multiline_statement(lnum)
138 if getline(lnum - 1) =~# '\\$'
139 let lnum = prevnonblank(lnum - 1)
141 let [paren_lnum, _] = s:find_opening_paren(lnum, 1)
145 let lnum = paren_lnum
151 " Find possible indent(s) of the block starter that matches the current line.
152 function! s:find_start_of_block(lnum, types, multiple)
154 let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>'
156 let last_indent = indent(lnum) + 1
157 while lnum > 0 && last_indent > 0
158 let indent = indent(lnum)
159 if indent < last_indent
160 if getline(lnum) =~# re
164 if index(r, indent) == -1
167 let last_indent = indent
170 let lnum = prevnonblank(lnum - 1)
175 " Is "expr" true for every position in "lnum", beginning at "start"?
176 " (optionally up to a:1 / 4th argument)
177 function! s:match_expr_on_line(expr, lnum, start, ...)
178 let text = getline(a:lnum)
179 let end = a:0 ? a:1 : len(text)
183 let save_pos = getpos('.')
185 for i in range(a:start, end)
186 call cursor(a:lnum, i)
187 if !(eval(a:expr) || text[i-1] =~# '\s')
192 call setpos('.', save_pos)
196 " Line up with open parenthesis/bracket/brace.
197 function! s:indent_like_opening_paren(lnum)
198 let [paren_lnum, paren_col] = s:find_opening_paren(a:lnum, 1)
202 let text = getline(paren_lnum)
203 let base = indent(paren_lnum)
205 let nothing_after_opening_paren = s:match_expr_on_line(
206 \ s:skip_after_opening_paren, paren_lnum, paren_col+1)
207 let starts_with_closing_paren = getline(a:lnum) =~# '^\s*[])}]'
209 let hang_closing = get(b:, 'python_pep8_indent_hang_closing',
210 \ get(g:, 'python_pep8_indent_hang_closing', 0))
212 if nothing_after_opening_paren
213 if starts_with_closing_paren && !hang_closing
216 let res = base + s:sw()
219 " Indent to match position of opening paren.
223 " If this line is the continuation of a control statement
224 " indent further to distinguish the continuation line
225 " from the next logical line.
226 if text =~# b:control_statement && res == base + s:sw()
227 " But only if not inside parens itself (Flake's E127).
228 let [paren_lnum, _] = s:find_opening_paren(paren_lnum, 1)
236 " Match indent of first block of this type.
237 function! s:indent_like_block(lnum)
238 let text = getline(a:lnum)
239 for [multiple, block_rules] in [
240 \ [0, s:block_rules],
241 \ [1, s:block_rules_multiple]]
242 for [line_re, blocks] in items(block_rules)
247 let indents = s:find_start_of_block(a:lnum - 1, blocks, multiple)
255 " Multiple valid indents, e.g. for 'else' with both try and if.
256 let indent = indent(a:lnum)
257 if index(indents, indent) != -1
258 " The indent is valid, keep it.
261 " Fallback to the first/nearest one.
268 function! s:indent_like_previous_line(lnum)
269 let lnum = prevnonblank(a:lnum - 1)
271 " No previous line, keep current indent.
276 let text = getline(lnum)
277 let start = s:find_start_of_multiline_statement(lnum)
278 let base = indent(start)
279 let current = indent(a:lnum)
281 " Ignore last character in previous line?
282 let lastcol = len(text)
285 " Search for final colon that is not inside something to be ignored.
287 if col == 1 | break | endif
288 if text[col-1] =~# '\s' || s:_skip_special_chars(lnum, col)
291 elseif text[col-1] ==# ':'
297 if text =~# '\\$' && !s:_skip_special_chars(lnum, lastcol)
298 " If this line is the continuation of a control statement
299 " indent further to distinguish the continuation line
300 " from the next logical line.
301 if getline(start) =~# b:control_statement
302 return base + s:sw() * 2
305 " Nest (other) explicit continuations only one level deeper.
309 let empty = getline(a:lnum) =~# '^\s*$'
311 " Current and prev line are empty, next is not -> indent like next.
312 if empty && a:lnum > 1 &&
313 \ (getline(a:lnum - 1) =~# '^\s*$') &&
314 \ !(getline(a:lnum + 1) =~# '^\s*$')
315 return indent(a:lnum + 1)
318 " If the previous statement was a stop-execution statement or a pass
319 if getline(start) =~# s:stop_statement
320 " Remove one level of indentation if the user hasn't already dedented
321 if empty || current > base - s:sw()
324 " Otherwise, trust the user
328 if (current || !empty) && s:is_dedented_already(current, base)
332 " In all other cases, line up with the start of the previous statement.
336 " If this line is dedented and the number of indent spaces is valid
337 " (multiple of the indentation size), trust the user.
338 function! s:is_dedented_already(current, base)
339 let dedent_size = a:current - a:base
340 return (dedent_size < 0 && a:current % s:sw() == 0) ? 1 : 0
343 " Is the syntax at lnum (and optionally cnum) a python string?
344 function! s:is_python_string(lnum, ...)
345 let line = getline(a:lnum)
347 let cols = type(a:1) != type([]) ? [a:1] : a:1
349 let cols = range(1, max([1, len(line)]))
352 if match(map(synstack(a:lnum, cnum),
353 \ "synIDattr(v:val, 'name')"), 'python\S*String') == -1
360 function! GetPythonPEPIndent(lnum)
361 " First line has indent 0
366 let line = getline(a:lnum)
367 let prevline = getline(a:lnum-1)
369 " Multilinestrings: continous, docstring or starting.
370 if s:is_python_string(a:lnum-1, max([1, len(prevline)]))
371 \ && (s:is_python_string(a:lnum, 1)
372 \ || match(line, '^\%("""\|''''''\)') != -1)
374 " Indent closing quotes as the line with the opening ones.
375 let match_quotes = match(line, '^\s*\zs\%("""\|''''''\)')
376 if match_quotes != -1
377 " closing multiline string
378 let quotes = line[match_quotes:(match_quotes+2)]
379 call cursor(a:lnum, 1)
380 let pairpos = searchpairpos(quotes, '', quotes, 'bW', '', 0, g:python_pep8_indent_searchpair_timeout)
382 return indent(pairpos[0])
388 if s:is_python_string(a:lnum-1)
389 " Previous line is (completely) a string: keep current indent.
393 if match(prevline, '^\s*\%("""\|''''''\)') != -1
395 return indent(a:lnum-1)
398 let indent_multi = get(b:, 'python_pep8_indent_multiline_string',
399 \ get(g:, 'python_pep8_indent_multiline_string', 0))
400 if match(prevline, '\v%("""|'''''')$') != -1
401 " Opening multiline string, started in previous line.
402 if (&autoindent && indent(a:lnum) == indent(a:lnum-1))
403 \ || match(line, '\v^\s+$') != -1
404 " <CR> with empty line or to split up 'foo("""bar' into
405 " 'foo("""' and 'bar'.
406 if indent_multi == -2
407 return indent(a:lnum-1) + s:sw()
413 " Keep existing indent.
414 if match(line, '\v^\s*\S') != -1
418 if indent_multi != -2
422 return s:indent_like_opening_paren(a:lnum)
425 " Parens: If we can find an open parenthesis/bracket/brace, line up with it.
426 let indent = s:indent_like_opening_paren(a:lnum)
431 " Blocks: Match indent of first block of this type.
432 let indent = s:indent_like_block(a:lnum)
437 return s:indent_like_previous_line(a:lnum)