" 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: Public Domain
+" License: CC0
+"
+" vim-python-pep8-indent - A nicer Python indentation style for vim.
+" 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
+" worldwide. This software is distributed without any warranty.
+" You should have received a copy of the CC0 Public Domain Dedication along
+" with this software. If not, see
+" <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
-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
+
let s:block_rules = {
- \ '^\s*\(elif\|else\)\>': ['if', 'elif'],
- \ '^\s*except\>': ['try', 'except'],
- \ '^\s*finally\>': ['try', 'except', 'else']
- \ }
-let s:paren_pairs = ['()', '{}', '[]']
-let s:control_statement = '^\s*\(if\|while\|with\|for\|except\)\>'
-let s:stop_statement = '^\s*\(break\|continue\|raise\|return\|pass\)\>'
-if v:version >= 704 || (v:version == 703 && has('patch1037'))
- let s:string_literal = '".\{-}\\\@1<!"\|''.\{-}\\\@1<!'''
+ \ '^\s*elif\>': ['if', 'elif'],
+ \ '^\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 s:string_literal = '".\{-}\\\@<!"\|''.\{-}\\\@<!'''
+ 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.
+" jedi* refers to syntax definitions from jedi-vim for call signatures, which
+" are inserted temporarily into the buffer.
+let s:skip_special_chars = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
+ \ '=~? "\\vstring|comment|^pythonbytes%(contents)=$|jedi\\S"'
+
+let s:skip_after_opening_paren = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
+ \ '=~? "\\vcomment|jedi\\S"'
+
+" Also ignore anything concealed.
+" 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
+if has('conceal')
+ let s:skip_special_chars .= '|| s:is_concealed(line("."), col("."))'
endif
-" compatibility with vim patch 7.3.629: 'sw' can be set to -1 to follow 'ts'
+
+" Use 'shiftwidth()' instead of '&sw'.
+" (Since Vim patch 7.3.629, 'shiftwidth' can be set to 0 to follow 'tabstop').
if exists('*shiftwidth')
function! s:sw()
return shiftwidth()
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
+function! s:find_opening_paren(lnum, col)
+ " Return if cursor is in a comment.
+ if synIDattr(synID(a:lnum, a:col, 0), 'name') =~? 'comment'
+ return [0, 0]
endif
- let stopline = max([0, line('.') - s:maxoff])
-
- " Skip strings and comments
- let skip = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
- \ '=~? "string\\|comment"'
+ call cursor(a:lnum, a:col)
- " Return if cursor is in a comment or string
- exe 'if' skip '| return [0, 0] | endif'
-
- let positions = []
- for p in s:paren_pairs
- call add(positions, searchpairpos('\V'.p[0], '', '\V'.p[1], 'bnW', skip, stopline))
+ let nearest = [0, 0]
+ 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', s:skip_special_chars, stopline)
+ 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, 0, [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, multiple)
+ let r = []
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
+ let indent = indent(lnum)
+ if indent < last_indent
if getline(lnum) =~# re
- return lnum
+ 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()
" 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] 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
function! s:indent_like_previous_line(lnum)
let lnum = prevnonblank(a:lnum - 1)
- let text = getline(lnum)
- let start = s:find_start_of_multiline_statement(lnum)
- let base = indent(start)
-
- " Remove string literals.
- let text = substitute(text, s:string_literal, '', 'g')
- " If the previous line ended with a colon and is not a comment, indent
- " relative to statement start.
- if text =~ '^[^#]*:\s*\(#.*\)\?$'
- return base + s:sw()
+ " No previous line, keep current indent.
+ if lnum < 1
+ return -1
endif
+ let text = getline(lnum)
+ let start = s:find_start_of_multiline_statement(lnum)
+ let base = indent(start)
+ let current = indent(a:lnum)
+
+ " Jump to last character in previous line.
+ call cursor(lnum, len(text))
+ let ignore_last_char = eval(s:skip_special_chars)
+
+ " Search for final colon that is not inside something to be ignored.
+ while 1
+ let curpos = getpos('.')[2]
+ if curpos == 1 | break | endif
+ if eval(s:skip_special_chars) || text[curpos-1] =~# '\s'
+ normal! h
+ continue
+ elseif text[curpos-1] ==# ':'
+ return base + s:sw()
+ endif
+ break
+ endwhile
- if text =~ '\\$'
+ 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 (current || !empty) && s:is_dedented_already(current, base)
+ return -1
+ endif
+
" In all other cases, line up with the start of the previous statement.
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)]
+ 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: 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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