" 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
+
+if !exists('g:python_pep8_indent_hang_closing')
+ let g:python_pep8_indent_hang_closing = 0
+endif
+
+" TODO: check required patch for timeout argument, likely lower than 7.3.429 though.
+if !exists('g:python_pep8_indent_searchpair_timeout')
+ if has('patch-8.0.1483')
+ let g:python_pep8_indent_searchpair_timeout = 150
+ else
+ let g:python_pep8_indent_searchpair_timeout = 0
+ endif
+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*\(if\|while\|with\|for\|except\)\>'
+ \ '^\s*elif\>': [['if', 'elif'], ['else']],
+ \ '^\s*except\>': [['try', 'except'], []],
+ \ '^\s*finally\>': [['try', 'except', 'else'], []]
+ \ }
+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 = {'()': 50, '[]': 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
-let s:skip_special_chars = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
- \ '=~? "string\\|comment"'
+let s:skip_after_opening_paren = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
+ \ '=~? "\\vcomment|jedi\\S"'
-let s:skip_search = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
- \ '=~? "comment"'
+let s:special_chars_syn_pattern = "\\vstring|comment|^pythonbytes%(contents)=$|pythonTodo|jedi\\S"
+
+if !get(g:, 'python_pep8_indent_skip_concealed', 0) || !has('conceal')
+ " Skip strings and comments. Return 1 for chars to skip.
+ " jedi* refers to syntax definitions from jedi-vim for call signatures, which
+ " are inserted temporarily into the buffer.
+ function! s:_skip_special_chars(line, col)
+ return synIDattr(synID(a:line, a:col, 0), 'name')
+ \ =~? s:special_chars_syn_pattern
+ endfunction
+else
+ " Also ignore anything concealed.
+ " TODO: doc; likely only necessary with jedi-vim, where a better version is
+ " planned (https://github.com/Vimjas/vim-python-pep8-indent/pull/98).
+
+ " Wrapper around synconcealed for older Vim (7.3.429, used on Travis CI).
+ function! s:is_concealed(line, col)
+ let concealed = synconcealed(a:line, a:col)
+ return len(concealed) && concealed[0]
+ endfunction
+
+ function! s:_skip_special_chars(line, col)
+ return synIDattr(synID(a:line, a:col, 0), 'name')
+ \ =~? s:special_chars_syn_pattern
+ \ || s:is_concealed(a:line, a:col)
+ endfunction
+endif
" Use 'shiftwidth()' instead of '&sw'.
" (Since Vim patch 7.3.629, 'shiftwidth' can be set to 0 to follow 'tabstop').
endfunction
else
function! s:sw()
- return &sw
+ return &shiftwidth
endfunction
endif
-function! s:pair_sort(x, y)
- if a:x[0] == a:y[0]
- return a:x[1] == a:y[1] ? 0 : a:x[1] > a:y[1] ? 1 : -1
- else
- return a:x[0] > a:y[0] ? 1 : -1
- endif
-endfunction
-
" Find backwards the closest open parenthesis/bracket/brace.
-function! s:find_opening_paren(...)
- " optional arguments: line and column (defaults to 1) to search around
- if a:0 > 0
- let view = winsaveview()
- call cursor(a:1, a:0 > 1 ? a:2 : 1)
- let ret = s:find_opening_paren()
- call winrestview(view)
- return ret
- endif
-
- let stopline = max([0, line('.') - s:maxoff])
-
+function! s:find_opening_paren(lnum, col)
" Return if cursor is in a comment.
- exe 'if' s:skip_search '| return [0, 0] | endif'
+ if synIDattr(synID(a:lnum, a:col, 0), 'name') =~? 'comment'
+ return [0, 0]
+ endif
- let positions = []
- for p in s:paren_pairs
- call add(positions, searchpairpos(
- \ '\V'.p[0], '', '\V'.p[1], 'bnW', s:skip_special_chars, stopline))
+ call cursor(a:lnum, a:col)
+
+ let nearest = [0, 0]
+ let timeout = g:python_pep8_indent_searchpair_timeout
+ let skip_special_chars = 's:_skip_special_chars(line("."), col("."))'
+ for [p, maxoff] in items(s:paren_pairs)
+ let stopline = max([0, line('.') - maxoff, nearest[0]])
+ let next = searchpairpos(
+ \ '\V'.p[0], '', '\V'.p[1], 'bnW', skip_special_chars, stopline, timeout)
+ if next[0] && (next[0] > nearest[0] || (next[0] == nearest[0] && next[1] > nearest[1]))
+ let nearest = next
+ endif
endfor
-
- " Remove empty matches and return the type with the closest match
- call filter(positions, 'v:val[0]')
- call sort(positions, 's:pair_sort')
-
- return get(positions, -1, [0, 0])
+ return nearest
endfunction
" Find the start of a multi-line statement
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)
+ let [paren_lnum, _] = s:find_opening_paren(lnum, 1)
if paren_lnum < 1
return lnum
else
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, skip, multiple) abort
+ let r = []
let re = '\V\^\s\*\('.join(a:types, '\|').'\)\>'
-
+ if !empty(a:skip)
+ let re_skip = '\V\^\s\*\('.join(a:skip, '\|').'\)\>'
+ else
+ let re_skip = ''
+ endif
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
+ let indent = indent(lnum)
+ if indent < last_indent
+ let line = getline(lnum)
+ if !empty(re_skip) && line =~# re_skip
+ let last_indent = indent
+ elseif line =~# re
+ if !a:multiple
+ return [indent]
+ endif
+ if index(r, indent) == -1
+ let r += [indent]
+ endif
+ let last_indent = indent
endif
- 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"?
+" (optionally up to a:1 / 4th argument)
+function! s:match_expr_on_line(expr, lnum, start, ...)
+ let text = getline(a:lnum)
+ let end = a:0 ? a:1 : len(text)
+ if a:start > end
+ return 1
+ endif
+ let save_pos = getpos('.')
+ let r = 1
+ for i in range(a:start, end)
+ call cursor(a:lnum, i)
+ if !(eval(a:expr) || text[i-1] =~# '\s')
+ let r = 0
+ break
+ endif
+ endfor
+ call setpos('.', save_pos)
+ return r
endfunction
" Line up with open parenthesis/bracket/brace.
function! s:indent_like_opening_paren(lnum)
- let [paren_lnum, paren_col] = s:find_opening_paren(a:lnum)
+ let [paren_lnum, paren_col] = s:find_opening_paren(a:lnum, 1)
if paren_lnum <= 0
return -2
endif
let text = getline(paren_lnum)
let base = indent(paren_lnum)
- let nothing_after_opening_paren = text =~ '\%'.(paren_col + 1).'c\s*$'
- let starts_with_closing_paren = getline(a:lnum) =~ '^\s*[])}]'
+ 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 hang_closing = get(b:, 'python_pep8_indent_hang_closing',
+ \ get(g:, 'python_pep8_indent_hang_closing', 0))
if nothing_after_opening_paren
- if starts_with_closing_paren
+ if starts_with_closing_paren && !hang_closing
let res = base
else
- let res = base + s:sw()
+ return base + s:sw()
endif
else
" Indent to match position of opening 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()
- return base + s:sw() * 2
- else
- return res
+ if text =~# b:control_statement && res == base + s:sw()
+ " But only if not inside parens itself (Flake's E127).
+ let [paren_lnum, _] = s:find_opening_paren(paren_lnum, 1)
+ if paren_lnum <= 0
+ return res + s:sw()
+ endif
endif
+ return res
endfunction
" 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_ignore] 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 [blocks, skip] = blocks_ignore
+ let indents = s:find_start_of_block(a:lnum - 1, blocks, skip, multiple)
+ if empty(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 base = indent(start)
let current = indent(a:lnum)
- " Jump to last character in previous line.
- call cursor(lnum, len(text))
- let ignore_last_char = eval(s:skip_special_chars)
+ " Ignore last character in previous line?
+ let lastcol = len(text)
+ let col = lastcol
- " Search for final colon that is not inside a string or comment.
- while search(':\s*\%(#.*\)\?$', 'bcW', lnum)
- if eval(s:skip_special_chars)
- normal! h
- else
- return base + s:sw()
- endif
+ " Search for final colon that is not inside something to be ignored.
+ while 1
+ if col == 1 | break | endif
+ if text[col-1] =~# '\s' || s:_skip_special_chars(lnum, col)
+ let col = col - 1
+ continue
+ elseif text[col-1] ==# ':'
+ return base + s:sw()
+ endif
+ break
endwhile
- if text =~ '\\$' && !ignore_last_char
+ if text =~# '\\$' && !s:_skip_special_chars(lnum, lastcol)
" 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 (current || !empty) && s:is_dedented_already(current, base)
return -1
endif
return base
endfunction
-function! GetPythonPEPIndent(lnum)
+" 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)
+ if a:0
+ let cols = type(a:1) != type([]) ? [a:1] : a:1
+ else
+ let cols = range(1, max([1, len(line)]))
+ endif
+ for cnum in cols
+ if match(map(synstack(a:lnum, cnum),
+ \ "synIDattr(v:val, 'name')"), 'python\S*String') == -1
+ return 0
+ end
+ endfor
+ return 1
+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-1, max([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)]
+ call cursor(a:lnum, 1)
+ let pairpos = searchpairpos(quotes, '', quotes, 'bW', '', 0, g:python_pep8_indent_searchpair_timeout)
+ if pairpos[0] != 0
+ return indent(pairpos[0])
+ else
+ return -1
+ endif
+ endif
+
+ if s:is_python_string(a:lnum-1)
+ " Previous line is (completely) a string: keep current indent.
+ return -1
+ endif
+
+ if match(prevline, '^\s*\%("""\|''''''\)') != -1
+ " docstring.
+ return indent(a:lnum-1)
+ endif
+
+ 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.
let indent = s:indent_like_opening_paren(a:lnum)
if indent >= -1
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