if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'python-ident') == -1
" PEP8 compatible Python indent file
" Language: Python
" 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
"
" 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')
finish
endif
let b:did_indent = 1
setlocal nolisp
setlocal autoindent
setlocal indentexpr=GetPythonPEPIndent(v:lnum)
setlocal indentkeys=!^F,o,O,<:>,0),0],0},=elif,=except
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*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. 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|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
let s:skip_search = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
\ '=~? "comment"'
" 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 &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
" Return if cursor is in a comment.
exe 'if' s:skip_search '| return [0, 0] | endif'
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
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) =~# '\\$'
let lnum = prevnonblank(lnum - 1)
else
let [paren_lnum, _] = s:find_opening_paren(lnum)
if paren_lnum < 1
return lnum
else
let lnum = paren_lnum
endif
endif
endwhile
endfunction
" 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
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 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)
if paren_lnum <= 0
return -2
endif
let text = getline(paren_lnum)
let base = indent(paren_lnum)
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*[])}]'
if nothing_after_opening_paren
if starts_with_closing_paren
let res = base
else
let res = base + s:sw()
endif
else
" Indent to match position of opening paren.
let res = paren_col
endif
" If this line is the continuation of a control statement
" indent further to distinguish the continuation line
" from the next logical line.
if text =~# b:control_statement && res == base + s:sw()
return base + s:sw() * 2
else
return res
endif
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
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
" 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)
" 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 =~# '\\$' && !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) =~# b:control_statement
return base + s:sw() * 2
endif
" Nest (other) explicit continuations only one level deeper.
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 empty || current > base - s:sw()
return base - s:sw()
endif
" Otherwise, trust the user
return -1
endif
if !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
" 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 linelen = len(line)
if linelen < 1
let linelen = 1
endif
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
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, 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 indent(a:lnum-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
return indent
endif
" Blocks: Match indent of first block of this type.
let indent = s:indent_like_block(a:lnum)
if indent >= -1
return indent
endif
return s:indent_like_previous_line(a:lnum)
endfunction
endif
