-
Notifications
You must be signed in to change notification settings - Fork 69
/
python.vim
454 lines (399 loc) · 14.7 KB
/
python.vim
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
" 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
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'], ['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*\(break\|continue\|raise\|return\|pass\)\>'
let s:skip_after_opening_paren = 'synIDattr(synID(line("."), col("."), 0), "name") ' .
\ '=~? "\\vcomment|jedi\\S"'
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').
if exists('*shiftwidth')
function! s:sw()
return shiftwidth()
endfunction
else
function! s:sw()
return &shiftwidth
endfunction
endif
" Find backwards the closest open parenthesis/bracket/brace.
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
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
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, 1)
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, 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 last_indent = indent(a:lnum) + 1
let lnum = a:lnum - 1
while lnum > 0 && last_indent > 0
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
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, 1)
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*[])}]'
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 && !hang_closing
let res = base
else
let res = base + s:sw()
" Special case for parenthesis.
if text[paren_col-1] ==# '(' && getline(a:lnum) !~# '\v\)\s*:?\s*$'
return res
endif
endif
else
" Indent to match position of opening paren.
let res = paren_col
endif
" If this line is the continuation of a control statement
" indent further to distinguish the continuation line
" from the next logical line.
if text =~# b:control_statement && res == base + s:sw()
" But only if not inside parens itself (Flake's E127).
let [paren_lnum, _] = s:find_opening_paren(paren_lnum, 1)
if paren_lnum <= 0
return res + s:sw()
endif
endif
return res
endfunction
" Match indent of first block of this type.
function! s:indent_like_block(lnum)
let text = getline(a:lnum)
for [multiple, block_rules] in [
\ [0, s:block_rules],
\ [1, s:block_rules_multiple],
\ ]
for [line_re, blocks_ignore] in items(block_rules)
if text !~# line_re
continue
endif
let [blocks, skip] = blocks_ignore
let indents = s:find_start_of_block(a:lnum, blocks, skip, multiple)
if empty(indents)
return -1
endif
if len(indents) == 1
return indents[0]
endif
" Multiple valid indents, e.g. for 'else' with both try and if.
let indent = indent(a:lnum)
if index(indents, indent) != -1
" The indent is valid, keep it.
return indent
endif
" Fallback to the first/nearest one.
return indents[0]
endfor
endfor
return -2
endfunction
function! s:indent_like_previous_line(lnum)
let lnum = prevnonblank(a:lnum - 1)
" No previous line, keep current indent.
if lnum < 1
return -1
endif
let text = getline(lnum)
let start = s:find_start_of_multiline_statement(lnum)
let base = indent(start)
let current = indent(a:lnum)
" Ignore last character in previous line?
let lastcol = len(text)
let col = lastcol
" Search for final colon that is not inside something to be ignored.
while 1
if col == 1 | break | endif
if text[col-1] =~# '\s' || s:_skip_special_chars(lnum, col)
let col = col - 1
continue
elseif text[col-1] ==# ':'
return base + s:sw()
endif
break
endwhile
if text =~# '\\$' && !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) =~# 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 (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
" 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
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