Repository navigation
Expand file tree
/
Copy pathsurround.lua
More file actions
1142 lines (1012 loc) · 47.3 KB
/
Copy pathsurround.lua
File metadata and controls
1142 lines (1012 loc) · 47.3 KB
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
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
-- MIT License Copyright (c) 2021 Evgeni Chasnovski
-- Documentation ==============================================================
--- Custom somewhat minimal and fast surrounding Lua plugin. This is mostly
--- a reimplementation of the core features of 'machakann/vim-sandwich' with a
--- couple more on top (find surrounding, highlight surrounding). Can be
--- configured to have experience similar to 'tpope/vim-surround'.
---
--- Features:
--- - Actions (all of them are dot-repeatable out of the box):
--- - Add surrounding with `sa` (in visual mode or on motion).
--- - Delete surrounding with `sd`.
--- - Replace surrounding with `sr`.
--- - Find surrounding with `sf` or `sF` (move cursor right or left).
--- - Highlight surrounding with `sh`.
--- - Change number of neighbor lines with `sn` (see |MiniSurround-algorithm|).
--- - Surrounding is identified by a single character as both "input" (in
--- `delete` and `replace` start, `find`, and `highlight`) and "output" (in
--- `add` and `replace` end):
--- - 'f' - function call (string of alphanumeric symbols or '_' or '.'
--- followed by balanced '()'). In "input" finds function call, in
--- "output" prompts user to enter function name.
--- - 'i' - interactive. Prompts user to enter left and right parts.
--- - 't' - tag. In "input" finds tab with same identifier, in "output"
--- prompts user to enter tag name.
--- - All symbols in brackets '()', '[]', '{}', '<>". In "input' represents
--- balanced brackets, in "output" - left and right parts of brackets.
--- - All other alphanumeric, punctuation, or space characters represent
--- surrounding with identical left and right parts.
---
--- Known issues which won't be resolved:
--- - Search for surrounding is done using Lua patterns (regex-like approach).
--- So certain amount of false positives should be expected.
--- - When searching for "input" surrounding, there is no distinction if it is
--- inside string or comment. So in this case there will be not proper match
--- for a function call: 'f(a = ")", b = 1)'.
--- - Tags are searched using regex-like methods, so issues are inevitable.
--- Overall it is pretty good, but certain cases won't work. Like self-nested
--- tags won't match correctly on both ends: '<a><a></a></a>'.
---
--- # Setup~
---
--- This module needs a setup with `require('mini.surround').setup({})`
--- (replace `{}` with your `config` table). It will create global Lua table
--- `MiniSurround` which you can use for scripting or manually (with
--- `:lua MiniSurround.*`).
---
--- See |MiniSurround.config| for `config` structure and default values. It
--- also has example setup providing experience similar to 'tpope/vim-surround'.
---
--- You can override runtime config settings locally to buffer inside
--- `vim.b.minisurround_config` which should have same structure as
--- `MiniSurround.config`. See |mini.nvim-buffer-local-config| for more details.
---
--- # Example usage~
---
--- - `saiw)` - add (`sa`) for inner word (`iw`) parenthesis (`)`).
--- - `saiwi[[<CR>]]<CR>` - add (`sa`) for inner word (`iw`) interactive
--- surrounding (`i`): `[[` for left and `]]` for right.
--- - `sdf` - delete (`sd`) surrounding function call (`f`).
--- - `sr)tdiv<CR>` - replace (`sr`) surrounding parenthesis (`)`) with tag
--- (`t`) with identifier 'div' (`div<CR>` in command line prompt).
--- - `sff` - find right (`sf`) part of surrounding function call (`f`).
--- - `sh}` - highlight (`sh`) for a brief period of time surrounding curly
--- brackets (`}`)
---
--- # Highlight groups~
---
--- * `MiniSurround` - highlighting of requested surrounding.
---
--- To change any highlight group, modify it directly with |:highlight|.
---
--- # Disabling~
---
--- To disable, set `g:minisurround_disable` (globally) or
--- `b:minisurround_disable` (for a buffer) to `v:true`. Considering high
--- number of different scenarios and customization intentions, writing exact
--- rules for disabling module's functionality is left to user. See
--- |mini.nvim-disabling-recipes| for common recipes.
---@tag mini.surround
---@tag MiniSurround
---@toc_entry Surround
--- Algorithm design
---
--- - Adding "output" surrounding has a fairly straightforward algorithm:
--- - Determine places for left and right parts (via `<>`/`[]` marks or by
--- finding some other surrounding).
--- - Determine left and right parts of surrounding via using custom and
--- builtin surroundings (via `output` field of surrounding info see
--- |MiniSurround.config|).
--- - Properly add.
--- - Finding "input" surrounding is a lot more complicated and is a reason why
--- this implementation is only somewhat minimal. In a nutshell, current
--- algorithm `searches in the neighborhood lines based on a certain pattern
--- and search method a best match`. More detailed:
--- - Extract neighborhood of cursor line: no more than
--- `MiniSurround.config.n_lines` before, cursor line itself, no more than
--- `MiniSurround.config.n_lines` after. Note: actual search is done
--- firstly on cursor line (i.e. with `n_lines = 0`), as it is the most
--- frequent usage and only then searches in wholeneighborhood.
--- - Convert it to "1d neighborhood" by concatenating with '\n' delimiter.
--- Compute location of current cursor position in this line.
--- - Given Lua pattern for an "input" surrounding (`input.find` field of
--- surrounding info; see |MiniSurround.config|), search for best match.
--- That is:
--- - Match with span covering cursor position. If several, try to pick
--- one with smallest width.
--- - If no covering match, pick one of "previous" (nearest
--- non-covering to the left) or "next" (nearest non-covering to the
--- right) matches, depending on `config.search_method` (see
--- |MiniSurround.config| for more details).
--- This computation is an iterative procedure, duration of which heavily
--- depends on the length of "1d neighborhood" and frequency of pattern
--- matching. If no match is found, there is no surrounding. Note: with
--- current approach smallest width of covering match is ensured by
--- checking match on covering substrings. This may have unwanted
--- consequences when using complex Lua patterns (like `%f[]` at the
--- pattern end, for example).
--- - Compute parts of "1d neighborhood" that represent left and right part
--- of found surrounding. This is done by using pattern from
--- `input.extract` field of surrounding info; see |MiniSurround.config|.
--- Note: pattern is used on a matched substring, so using `^` and `$` at
--- start and end of pattern means start and end of substring.
--- - Convert "1d offsets" of found parts to their positions in buffer.
---@tag MiniSurround-algorithm
-- Module definition ==========================================================
local MiniSurround = {}
local H = {}
--- Module setup
---
---@param config table Module config table. See |MiniSurround.config|.
---
---@usage `require('mini.surround').setup({})` (replace `{}` with your `config` table)
MiniSurround.setup = function(config)
-- Export module
_G.MiniSurround = MiniSurround
-- Setup config
config = H.setup_config(config)
-- Apply config
H.apply_config(config)
-- Create highlighting
vim.api.nvim_exec('hi default link MiniSurround IncSearch', false)
end
--- Module config
---
--- Default values:
---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)
---@text # Setup similar to 'tpope/vim-surround'~
---
--- This module is primarily designed after 'machakann/vim-sandwich'. To get
--- behavior closest to 'tpope/vim-surround' (but not identical), use this setup:
--- >
--- require('mini.surround').setup({
--- custom_surroundings = {
--- ['('] = { output = { left = '( ', right = ' )' } },
--- ['['] = { output = { left = '[ ', right = ' ]' } },
--- ['{'] = { output = { left = '{ ', right = ' }' } },
--- ['<'] = { output = { left = '< ', right = ' >' } },
--- },
--- mappings = {
--- add = 'ys',
--- delete = 'ds',
--- find = '',
--- find_left = '',
--- highlight = '',
--- replace = 'cs',
--- update_n_lines = '',
--- },
--- search_method = 'cover_or_next',
--- })
---
--- -- Remap adding surrounding to Visual mode selection
--- vim.api.nvim_set_keymap('x', 'S', [[:<C-u>lua MiniSurround.add('visual')<CR>]], { noremap = true })
---
--- -- Make special mapping for "add surrounding for line"
--- vim.api.nvim_set_keymap('n', 'yss', 'ys_', { noremap = false })
--- <
--- # Options~
---
--- ## Custom surroundings~
---
--- User can define own surroundings by supplying `config.custom_surroundings`.
--- It should be a **table** with keys being single character surrounding
--- identifier and values - surround info or **function** returning it.
--- Surround info itself is a table with keys:
--- - <input> - defines how to find and extract surrounding for "input"
--- operations (like `delete`). A table with fields <find> (Lua pattern
--- applied for search in neighborhood) and <extract> (Lua pattern applied
--- for extracting left and right parts; should have two matches).
--- - <output> - defines what to add on left and right for "output" operations
--- (like `add`). A table with <left> (plain text string) and <right> (plain
--- text string) fields.
---
--- Example of surround info for builtin `(` identifier:>
--- {
--- input = { find = '%b()', extract = '^(.).*(.)$' },
--- output = { left = '(', right = ')' }
--- }
--- <
--- General recommendations:
--- - In `config.custom_surroundings` only some data can be defined (like only
--- `input.find`). Other fields will be taken from builtin surroundings.
--- - Function returning table with surround info instead of table itself is
--- helpful when user input is needed (like asking for function name). Use
--- |input()| or |MiniSurround.user_inpu()|. Return `nil` to stop any current
--- surround operation.
--- - In input patterns try to use lazy quantifier instead of greedy ones (`.-`
--- instead of `.*` or `.+`). That is because the underlying algorithm of
--- finding smallest covering is better designed for lazy quantifier.
--- - Usage of frontier pattern `%f[]` not at the end of pattern can be useful
--- to extend match to the left. Like `%f[%w]%w+%b()` matches simplified
--- function call while capturing whole function name instead of last symbol.
--- - Usage of frontier pattern at the end of match is currently problematic
--- because output "smallest width" match is computed by checking the match
--- on substrings. And frontier pattern matches at the end of substring for
--- appropriate last character. So `%f[%w]%w+%f[%W]` won't match whole word.
---
--- Present builtin surroundings by their single character identifier:
--- - `(` and `)` - balanced pair of `()`.
--- - `[` and `]` - balanced pair of `[]`.
--- - `{` and `}` - balanced pair of `{}`.
--- - `<` and `>` - balanced pair of `<>`.
--- - `f` - function call. Maximum set of allowed symbols (alphanumeric, `_`
--- and `.`) followed by balanced pair of `()`.
--- - `i` - interactive, prompts user to enter left and right parts.
--- - `t` - HTML tags.
--- - Any other non-recognized identifier represents surrounding with identical
--- left and right parts equal to identifier (like `_`, etc.).
---
--- Examples of using `config.custom_surroundings`:
--- >
--- require('mini.surround').setup({
--- custom_surroundings = {
--- -- Make `)` insert parts with spaces. `input` pattern stays the same.
--- [')'] = { output = { left = '( ', right = ' )' } },
---
--- -- Modify `f` (function call) to find functions with only alphanumeric
--- -- characters in its name.
--- f = { input = { find = '%f[%w]%w+%b()' } },
---
--- -- Use function to compute surrounding info
--- ['*'] = {
--- input = function()
--- local n_star = MiniSurround.user_input('Number of * to find: ')
--- local many_star = string.rep('%*', tonumber(n_star) or 1)
--- local find = string.format('%s.-%s', many_star, many_star)
--- local extract = string.format('^(%s).*(%s)$', many_star, many_star)
--- return { find = find, extract = extract }
--- end,
--- output = function()
--- local n_star = MiniSurround.user_input('Number of * to output: ')
--- local many_star = string.rep('*', tonumber(n_star) or 1)
--- return { left = many_star, right = many_star }
--- end,
--- },
--- },
--- })
---
--- -- Create custom surrouding for Lua's block string `[[...]]`. Use this inside
--- -- autocommand or 'after/ftplugin/lua.lua' file.
--- vim.b.minisurround_config = {
--- custom_surroundings = {
--- s = {
--- input = { find = '%[%[.-%]%]', extract = '^(..).*(..)$' },
--- output = { left = '[[', right = ']]' },
--- },
--- },
--- }
--- <
--- ## Search method~
---
--- Value of `config.search_method` defines how best match search for "input"
--- surrounding is done when there is no covering match (with span covering
--- cursor position) found within searched neighborhood. Based on its value,
--- one of "previous", "next", or neither match is used as output.
--- Its possible values are:
--- - `'cover'` (default) - don't use either "previous" or "next"; report that
--- there is no surrounding found.
--- - `'cover_or_prev'` - use previous.
--- - `'cover_or_next'` - use next.
--- - `'cover_or_nearest'` - use nearest to current cursor position. Distance
--- is computed based on "1d neighborhood" using nearest part of
--- surroundings. Next is used in case of a tie.
---
--- Note: search is first performed on the cursor line and only after failure -
--- on the whole neighborhood defined by `config.n_lines`. This means that with
--- `config.search_method` not equal to `'cover'`, "previous" or "next"
--- surrounding will end up as search result if they present on current line
--- although covering match might be found in bigger, whole neighborhood. This
--- design is based on observation that most of the time operation involving
--- surrounding is done withtin cursor line.
---
--- Here is an example of how replacing `)` with `]` surrounding is done based
--- on a value of `'config.search_method'` when cursor is inside `bbb` word:
--- - `search_method = 'cover'`: `(a) bbb (c)` -> `(a) bbb (c)` (with message)
--- - `search_method = 'cover_or_prev'`: `(a) bbb (c)` -> `[a] bbb (c)`
--- - `search_method = 'cover_or_next'`: `(a) bbb (c)` -> `(a) bbb [c]`
--- - `search_method = 'cover_or_nearest'`: depends on cursor position.
--- For first `b` - as in `cover_or_prev` (as previous match is nearer), for
--- second and third - as in `cover_or_next` (as next match is nearer).
MiniSurround.config = {
-- Add custom surroundings to be used on top of builtin ones. For more
-- information with examples, see `:h MiniSurround.config`.
custom_surroundings = nil,
-- Duration (in ms) of highlight when calling `MiniSurround.highlight()`
highlight_duration = 500,
-- Module mappings. Use `''` (empty string) to disable one.
mappings = {
add = 'sa', -- Add surrounding in Normal and Visual modes
delete = 'sd', -- Delete surrounding
find = 'sf', -- Find surrounding (to the right)
find_left = 'sF', -- Find surrounding (to the left)
highlight = 'sh', -- Highlight surrounding
replace = 'sr', -- Replace surrounding
update_n_lines = 'sn', -- Update `n_lines`
},
-- Number of lines within which surrounding is searched
n_lines = 20,
-- How to search for surrounding (first inside current line, then inside
-- neighborhood). One of 'cover', 'cover_or_next', 'cover_or_prev',
-- 'cover_or_nearest'. For more details, see `:h MiniSurround.config`.
search_method = 'cover',
}
--minidoc_afterlines_end
-- Module functionality =======================================================
--- Surround operator
---
--- Main function to be used in expression mappings. No need to use it
--- directly, everything is setup in |MiniSurround.setup|.
---
---@param task string Name of surround task.
---@param cache table Task cache.
MiniSurround.operator = function(task, cache)
if H.is_disabled() then
-- Using `<Esc>` helps to stop moving cursor caused by current
-- implementation detail of adding `' '` inside expression mapping
return [[\<Esc>]]
end
H.cache = cache or {}
vim.cmd(string.format('set operatorfunc=v:lua.MiniSurround.%s', task))
return 'g@'
end
--- Add surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
---
---@param mode string Mapping mode (normal by default).
MiniSurround.add = function(mode)
-- Needed to disable in visual mode
if H.is_disabled() then return '<Esc>' end
-- Get marks' positions based on current mode
local marks = H.get_marks_pos(mode)
-- Get surround info. Try take from cache only in not visual mode (as there
-- is no intended dot-repeatability).
local surr_info
if mode == 'visual' then
surr_info = H.get_surround_info('output', false)
else
surr_info = H.get_surround_info('output', true)
end
if surr_info == nil then return '<Esc>' end
-- Add surrounding. Begin insert from right to not break column numbers
-- Insert after the right mark (`+ 1` is for that)
H.insert_into_line(marks.second.line, marks.second.col + 1, surr_info.right)
H.insert_into_line(marks.first.line, marks.first.col, surr_info.left)
-- Set cursor to be on the right of left surrounding
H.set_cursor(marks.first.line, marks.first.col + surr_info.left:len())
end
--- Delete surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.delete = function()
-- Find input surrounding
local surr = H.find_surrounding(H.get_surround_info('input', true))
if surr == nil then return '<Esc>' end
-- Delete surrounding. Begin with right to not break column numbers.
H.delete_linepart(surr.right)
H.delete_linepart(surr.left)
-- Set cursor to be on the right of deleted left surrounding
H.set_cursor(surr.left.line, surr.left.from)
end
--- Replace surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.replace = function()
-- Find input surrounding
local surr = H.find_surrounding(H.get_surround_info('input', true))
if surr == nil then return '<Esc>' end
-- Get output surround info
local new_surr_info = H.get_surround_info('output', true)
if new_surr_info == nil then return '<Esc>' end
-- Replace by parts starting from right to not break column numbers
H.delete_linepart(surr.right)
H.insert_into_line(surr.right.line, surr.right.from, new_surr_info.right)
H.delete_linepart(surr.left)
H.insert_into_line(surr.left.line, surr.left.from, new_surr_info.left)
-- Set cursor to be on the right of left surrounding
H.set_cursor(surr.left.line, surr.left.from + new_surr_info.left:len())
end
--- Find surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.find = function()
-- Find surrounding
local surr = H.find_surrounding(H.get_surround_info('input', true))
if surr == nil then return '<Esc>' end
-- Make array of positions to cycle through
local pos_array = H.linepart_to_pos_table(surr.left)
vim.list_extend(pos_array, H.linepart_to_pos_table(surr.right))
-- Cycle cursor through positions
local dir = H.cache.direction or 'right'
H.cursor_cycle(pos_array, dir)
-- Open 'enough folds' to show cursor
vim.cmd('normal! zv')
end
--- Highlight surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.highlight = function()
-- Find surrounding
local surr = H.find_surrounding(H.get_surround_info('input', true))
if surr == nil then return '<Esc>' end
-- Highlight surrounding
local config = H.get_config()
local buf_id = vim.api.nvim_get_current_buf()
H.highlight_surrounding(buf_id, surr)
vim.defer_fn(function() H.unhighlight_surrounding(buf_id, surr) end, config.highlight_duration)
end
--- Update `MiniSurround.config.n_lines`
---
--- Convenient wrapper for updating `MiniSurround.config.n_lines` in case the
--- default one is not appropriate.
MiniSurround.update_n_lines = function()
if H.is_disabled() then return '<Esc>' end
local n_lines = MiniSurround.user_input('New number of neighbor lines', MiniSurround.config.n_lines)
n_lines = math.floor(tonumber(n_lines) or MiniSurround.config.n_lines)
MiniSurround.config.n_lines = n_lines
end
--- Ask user for input
---
--- This is mainly a wrapper for |input()| which allows empty string as input,
--- cancelling with `<Esc>` and `<C-c>`, and slightly modifies prompt. Use it
--- to ask for input inside function custom surrounding (see |MiniSurround.config|).
MiniSurround.user_input = function(prompt, text)
-- Major issue with both `vim.fn.input()` is that the only way to distinguish
-- cancelling with `<Esc>` and entering empty string with immediate `<CR>` is
-- through `cancelreturn` option (see `:h input()`). In that case the return
-- of `cancelreturn` will mean actual cancel, which removes possibility of
-- using that string. Although doable with very obscure string, this is not
-- very clean.
-- Overcome this by adding temporary keystroke listener.
local on_key = vim.on_key or vim.register_keystroke_callback
local was_cancelled = false
on_key(function(key)
if key == vim.api.nvim_replace_termcodes('<Esc>', true, true, true) then was_cancelled = true end
end, H.ns_id.input)
-- Ask for input
-- NOTE: it would be GREAT to make this work with `vim.ui.input()` but I
-- didn't find a way to make it work without major refactor of whole module.
-- The main issue is that `vim.ui.input()` is designed to perform action in
-- callback and current module design is to get output immediately. Although
-- naive approach of
-- `local res; vim.ui.input({...}, function(input) res = input end)`
-- works in default `vim.ui.input`, its reimplementations can return from it
-- immediately and proceed in main event loop. Couldn't find a relatively
-- simple way to stop execution of this current function until `ui.input()`'s
-- callback finished execution.
local opts = { prompt = '(mini.surround) ' .. prompt .. ': ', default = text or '' }
-- Use `pcall` to allow `<C-c>` to cancel user input
local ok, res = pcall(vim.fn.input, opts)
-- Stop key listening
on_key(nil, H.ns_id.input)
if not ok or was_cancelled then return end
return res
end
-- Helper data ================================================================
-- Module default config
H.default_config = MiniSurround.config
-- Namespaces to be used withing module
H.ns_id = {
highlight = vim.api.nvim_create_namespace('MiniSurroundHighlight'),
input = vim.api.nvim_create_namespace('MiniSurroundInput'),
}
-- Table of builtin surroundings
H.builtin_surroundings = {
-- Brackets that need balancing
['('] = { input = { find = '%b()', extract = '^(.).*(.)$' }, output = { left = '(', right = ')' } },
[')'] = { input = { find = '%b()', extract = '^(.).*(.)$' }, output = { left = '(', right = ')' } },
['['] = { input = { find = '%b[]', extract = '^(.).*(.)$' }, output = { left = '[', right = ']' } },
[']'] = { input = { find = '%b[]', extract = '^(.).*(.)$' }, output = { left = '[', right = ']' } },
['{'] = { input = { find = '%b{}', extract = '^(.).*(.)$' }, output = { left = '{', right = '}' } },
['}'] = { input = { find = '%b{}', extract = '^(.).*(.)$' }, output = { left = '{', right = '}' } },
['<'] = { input = { find = '%b<>', extract = '^(.).*(.)$' }, output = { left = '<', right = '>' } },
['>'] = { input = { find = '%b<>', extract = '^(.).*(.)$' }, output = { left = '<', right = '>' } },
-- Function call
['f'] = {
input = { find = '%f[%w_%.][%w_%.]+%b()', extract = '^(.-%().*(%))$' },
output = function()
local fun_name = MiniSurround.user_input('Function name')
if fun_name == nil then return nil end
return { left = ('%s('):format(fun_name), right = ')' }
end,
},
-- Interactive
['i'] = {
input = function()
local left = MiniSurround.user_input('Left surrounding')
if left == nil or left == '' then return end
local right = MiniSurround.user_input('Right surrounding')
if right == nil or right == '' then return end
local left_esc, right_esc = vim.pesc(left), vim.pesc(right)
local find = ('%s.-%s'):format(left_esc, right_esc)
local extract = ('^(%s).-(%s)$'):format(left_esc, right_esc)
return { find = find, extract = extract }
end,
output = function()
local left = MiniSurround.user_input('Left surrounding')
if left == nil then return end
local right = MiniSurround.user_input('Right surrounding')
if right == nil then return end
return { left = left, right = right }
end,
},
-- Tag
['t'] = {
-- NOTEs:
-- - Here `%f[^%w]` denotes 'end of word' and is needed to capture whole
-- tag id. This is needed to not match in case '<ab></a>'.
-- - This approach won't match in the end of 'self nested' tags like
-- '<a>_<a>_</a>_</a>'.
-- - Having group capture and backreference in 'find' pattern increases
-- execution time. This is mostly visible when searching in a very big
-- '1d neighborhood'.
input = { find = '<(%w-)%f[^<%w][^<>]->.-</%1>', extract = '^(<.->).*(</[^/]->)$' },
output = function()
local tag_full = MiniSurround.user_input('Tag name')
if tag_full == nil then return nil end
local tag_name = tag_full:match('^%S*')
return { left = ('<%s>'):format(tag_full), right = ('</%s>'):format(tag_name) }
end,
},
}
-- Cache for dot-repeatability. This table is currently used with these keys:
-- - 'input' - surround info for searching (in 'delete' and 'replace' start).
-- - 'output' - surround info for adding (in 'add' and 'replace' end).
-- - 'direction' - direction in which `MiniSurround.find()` should go. Used to
-- enable same `operatorfunc` pattern for dot-repeatability.
H.cache = {}
-- Helper functionality =======================================================
-- Settings -------------------------------------------------------------------
H.setup_config = function(config)
-- General idea: if some table elements are not present in user-supplied
-- `config`, take them from default config
vim.validate({ config = { config, 'table', true } })
config = vim.tbl_deep_extend('force', H.default_config, config or {})
-- Validate per nesting level to produce correct error message
vim.validate({
custom_surroundings = { config.custom_surroundings, 'table', true },
highlight_duration = { config.highlight_duration, 'number' },
mappings = { config.mappings, 'table' },
n_lines = { config.n_lines, 'number' },
search_method = { config.search_method, H.is_search_method },
})
vim.validate({
['mappings.add'] = { config.mappings.add, 'string' },
['mappings.delete'] = { config.mappings.delete, 'string' },
['mappings.find'] = { config.mappings.find, 'string' },
['mappings.find_left'] = { config.mappings.find_left, 'string' },
['mappings.highlight'] = { config.mappings.highlight, 'string' },
['mappings.replace'] = { config.mappings.replace, 'string' },
['mappings.update_n_lines'] = { config.mappings.update_n_lines, 'string' },
})
return config
end
H.apply_config = function(config)
MiniSurround.config = config
--stylua: ignore start
-- Make mappings
-- NOTE: In mappings construct ` . ' '` "disables" motion required by `g@`.
-- It is used to enable dot-repeatability.
H.map('n', config.mappings.add, [[v:lua.MiniSurround.operator('add')]], { expr = true, desc = 'Add surrounding' })
H.map('x', config.mappings.add, [[:<C-u>lua MiniSurround.add('visual')<CR>]], { desc = 'Add surrounding to selection' })
H.map('n', config.mappings.delete, [[v:lua.MiniSurround.operator('delete') . ' ']], { expr = true, desc = 'Delete surrounding' })
H.map('n', config.mappings.replace, [[v:lua.MiniSurround.operator('replace') . ' ']], { expr = true, desc = 'Replace surrounding' })
H.map('n', config.mappings.find, [[v:lua.MiniSurround.operator('find', {'direction': 'right'}) . ' ']], { expr = true, desc = 'Find right surrounding' })
H.map('n', config.mappings.find_left, [[v:lua.MiniSurround.operator('find', {'direction': 'left'}) . ' ']], { expr = true, desc = 'Find left surrounding' })
H.map('n', config.mappings.highlight, [[v:lua.MiniSurround.operator('highlight') . ' ']], { expr = true, desc = 'Highlight surrounding' })
H.map('n', config.mappings.update_n_lines, '<Cmd>lua MiniSurround.update_n_lines()<CR>', { desc = 'Update `MiniSurround.config.n_lines`' })
--stylua: ignore end
end
H.is_disabled = function() return vim.g.minisurround_disable == true or vim.b.minisurround_disable == true end
H.get_config = function(config)
return vim.tbl_deep_extend('force', MiniSurround.config, vim.b.minisurround_config or {}, config or {})
end
H.is_search_method = function(x, x_name)
x = x or H.get_config().search_method
x_name = x_name or '`config.search_method`'
if vim.tbl_contains({ 'cover', 'cover_or_prev', 'cover_or_next', 'cover_or_nearest' }, x) then return true end
local msg = ([[%s should be one of 'cover', 'cover_or_prev', 'cover_or_next', 'cover_or_nearest'.]]):format(x_name)
return false, msg
end
H.validate_search_method = function(x, x_name)
local is_valid, msg = H.is_search_method(x, x_name)
if not is_valid then H.error(msg) end
end
-- Work with finding surrounding ----------------------------------------------
-- Find surrounding
-- NOTE: more simple approach for `find_surrounding()` would have been to use
-- combination of `searchpairpos()` (to search for balanced pair) and
-- `searchpos()` (to search end of balanced search and for unbalanced pairs).
-- However, there are several problems with it:
-- - It is slower (around 2-5 times) than current Lua pattern approach.
-- - It has limitations when dealing with crucial 'function call' search.
-- Function call is defined as 'non-empty function name followed by balanced
-- pair of "(" and ")"'. Naive use of `searchpairpos()` is to use
-- `searchpairpos('\w\+(', '', ')')` which works most of the time. However,
-- in example `foo(a = (1 + 1), b = c(1, 2))` this will match
-- `o(a = (1 + 1)` when cursor is on 'a'. This is because '(' inside it is
-- not recognized for balancing because it doesn't match '\w\+('.
--
-- Vim's approach also has some upsides:
-- - `searchpairpos()` allows skipping of certain matches, like if it is inside
-- string or comment. It works decently well with example from help (with
-- `synIDattr`, etc.) but this only works when Vim's builtin highlighting is
-- used. When treesitter's highlighting is active, this doesn't work.
--
-- All in all, using Vim's builtin functions is doable, but leads to roughly
-- same efforts as Lua pattern approach.
H.find_surrounding = function(surround_info)
-- `surround_info` should have `find` field with surrounding pattern. If
-- needed, it should also have a `extract` field with extract pattern for two
-- parts of surrounding assuming they are at the start and end of string.
if surround_info == nil then return nil end
local config = H.get_config()
local n_lines = config.n_lines
-- First try only current line as it is the most common use case
local surr = H.find_surrounding_in_neighborhood(surround_info, 0)
or H.find_surrounding_in_neighborhood(surround_info, n_lines)
if surr == nil then
local msg = ([[No surrounding '%s' found within %d line%s and `config.search_method = '%s'`.]]):format(
surround_info.id,
n_lines,
n_lines > 1 and 's' or '',
config.search_method
)
H.message(msg)
end
return surr
end
H.find_surrounding_in_neighborhood = function(surround_info, n_neighbors)
local neigh = H.get_cursor_neighborhood(n_neighbors)
local cur_offset = neigh.pos_to_offset(neigh.cursor_pos)
-- Find span of surrounding
local span = H.find_best_match(neigh['1d'], surround_info.find, cur_offset)
if span == nil then return nil end
-- Compute lineparts for left and right surroundings
local l, r = span.left, span.right
local left, right = neigh['1d']:sub(l, r):match(surround_info.extract)
if left == nil or right == nil then
H.error(
'Could not extract two surrounding parts. '
.. 'Does your `config.custom_surroundings.input.extract` pattern has two captures?'
)
end
local left_from, left_to = neigh.offset_to_pos(l), neigh.offset_to_pos(l + left:len() - 1)
local right_from, right_to = neigh.offset_to_pos(r - right:len() + 1), neigh.offset_to_pos(r)
local left_linepart = H.new_linepart(left_from, left_to)
if left_linepart == nil then return nil end
local right_linepart = H.new_linepart(right_from, right_to)
if right_linepart == nil then return nil end
return { left = left_linepart, right = right_linepart }
end
-- Work with operator marks ---------------------------------------------------
H.get_marks_pos = function(mode)
-- Region is inclusive on both ends
local mark1, mark2
if mode == 'visual' then
mark1, mark2 = '<', '>'
else
mark1, mark2 = '[', ']'
end
local pos1 = vim.api.nvim_buf_get_mark(0, mark1)
local pos2 = vim.api.nvim_buf_get_mark(0, mark2)
-- Tweak position in linewise mode as marks are placed on the first column
local is_linewise = (mode == 'line') or (mode == 'visual' and vim.fn.visualmode() == 'V')
if is_linewise then
-- Move start mark past the indent
pos1[2] = vim.fn.indent(pos1[1])
-- Move end mark to the last character (` - 2` here because `col()` returns
-- column right after the last 1-based column)
pos2[2] = vim.fn.col({ pos2[1], '$' }) - 2
end
-- Make columns 1-based instead of 0-based. This is needed because
-- `nvim_buf_get_mark()` returns the first 0-based byte of mark symbol and
-- all the following operations are done with Lua's 1-based indexing.
pos1[2], pos2[2] = pos1[2] + 1, pos2[2] + 1
-- Tweak second position to respect multibyte characters. Reasoning:
-- - These positions will be used with 'insert_into_line(line, col, text)' to
-- add some text. Its logic is `line[1:(col - 1)] + text + line[col:]`,
-- where slicing is meant on byte level.
-- - For the first mark we want the first byte of symbol, then text will be
-- insert to the left of the mark.
-- - For the second mark we want last byte of symbol. To add surrounding to
-- the right, use `pos2[2] + 1`.
local line2 = vim.fn.getline(pos2[1])
-- This returns the last byte inside character because `vim.str_byteindex()`
-- 'rounds upwards to the end of that sequence'.
pos2[2] = vim.str_byteindex(
line2,
-- Use `math.min()` because it might lead to 'index out of range' error
-- when mark is positioned at the end of line (that extra space which is
-- selected when selecting with `v$`)
vim.str_utfindex(line2, math.min(#line2, pos2[2]))
)
return {
first = { line = pos1[1], col = pos1[2] },
second = { line = pos2[1], col = pos2[2] },
}
end
-- Work with cursor -----------------------------------------------------------
H.set_cursor = function(line, col) vim.api.nvim_win_set_cursor(0, { line, col - 1 }) end
H.compare_pos = function(pos1, pos2)
if pos1.line < pos2.line then return '<' end
if pos1.line > pos2.line then return '>' end
if pos1.col < pos2.col then return '<' end
if pos1.col > pos2.col then return '>' end
return '='
end
H.cursor_cycle = function(pos_array, dir)
local cur_pos = vim.api.nvim_win_get_cursor(0)
cur_pos = { line = cur_pos[1], col = cur_pos[2] + 1 }
local compare, to_left, to_right, res_pos
-- NOTE: `pos_array` should be an increasingly ordered array of positions
for _, pos in pairs(pos_array) do
compare = H.compare_pos(cur_pos, pos)
-- Take position when moving to left if cursor is strictly on right.
-- This will lead to updating `res_pos` until the rightmost such position.
to_left = compare == '>' and dir == 'left'
-- Take position when moving to right if cursor is strictly on left.
-- This will update result only once leading to the leftmost such position.
to_right = res_pos == nil and compare == '<' and dir == 'right'
if to_left or to_right then res_pos = pos end
end
res_pos = res_pos or (dir == 'right' and pos_array[1] or pos_array[#pos_array])
vim.api.nvim_win_set_cursor(0, { res_pos.line, res_pos.col - 1 })
end
-- Work with user input -------------------------------------------------------
H.user_surround_id = function(sur_type)
-- Get from user single character surrounding identifier
local needs_help_msg = true
vim.defer_fn(function()
if not needs_help_msg then return end
local msg = string.format('Enter %s surrounding identifier (single character) ', sur_type)
H.message(msg)
end, 1000)
local ok, char = pcall(vim.fn.getchar)
needs_help_msg = false
-- Terminate if couldn't get input (like with <C-c>) or it is `<Esc>`
if not ok or char == 27 then return nil end
if type(char) == 'number' then char = vim.fn.nr2char(char) end
if char:find('^[%w%p%s]$') == nil then
H.message('Input must be single character: alphanumeric, punctuation, or space.')
return nil
end
return char
end
-- Work with line parts and text ----------------------------------------------
-- Line part - table with fields `line`, `from`, `to`. Represent part of line
-- from `from` character (inclusive) to `to` character (inclusive).
H.new_linepart = function(pos_left, pos_right)
if pos_left.line ~= pos_right.line then
H.message('Positions span over multiple lines.')
return nil
end
return { line = pos_left.line, from = pos_left.col, to = pos_right.col }
end
H.linepart_to_pos_table = function(linepart)
local res = { { line = linepart.line, col = linepart.from } }
if linepart.from ~= linepart.to then table.insert(res, { line = linepart.line, col = linepart.to }) end
return res
end
H.delete_linepart = function(linepart)
local line = vim.fn.getline(linepart.line)
local new_line = line:sub(1, linepart.from - 1) .. line:sub(linepart.to + 1)
vim.fn.setline(linepart.line, new_line)
end
H.insert_into_line = function(line_num, col, text)
-- Important to remember when working with multibyte characters: `col` here
-- represents byte index, not character
local line = vim.fn.getline(line_num)
local new_line = line:sub(1, col - 1) .. text .. line:sub(col)
vim.fn.setline(line_num, new_line)
end
-- Work with Lua patterns -----------------------------------------------------
-- Find the best match (left and right offsets in `line`). Here "best" is:
-- - Covering (`left <= offset <= right`) with smallest width.
-- - If no covering, one of "previous" or "next", depending on
-- `config.search_method`.
-- Output is a table with two numbers (or `nil` in case of no match):
-- indexes of left and right parts of match. They have the following property:
-- `line:sub(left, right)` matches `'^' .. pattern .. '$'`.
H.find_best_match = function(line, pattern, offset)
H.validate_search_method()
local left_prev, right_prev, left, right, left_next, right_next
local stop = false
local init = 1
while not stop do
local match_left, match_right = line:find(pattern, init)
if match_left == nil then
-- Stop if first match is gone over `offset` to the right
stop = true
elseif match_right < offset then
left_prev, right_prev = match_left, match_right
-- Try find covering match. Originally this was `init = math.max(init +
-- 1, match_right)`. Generally, this works fine, but there is an edge
-- case with tags. Consider example: '<a>hello<b>world</a></b>' and
-- cursor inside '</b>'. First match is '<a>...</a>'. It doesn't cover
-- cursor, this branch is executed. If move to `match_right`, next
-- iteration will match inside '></b>' and will find no match.
-- This increases execution time, but tolerably so. On the plus side,
-- this edge case currently gives wrong result even in 'vim-sandwich' :)
init = match_left + 1
elseif match_left > offset then
left_next, right_next = match_left, match_right
-- Stop searching because already went past offset
stop = true
else
-- Successful match: match_left <= offset <= match_right
-- Update result only if current has smaller width. This ensures
-- "smallest width" condition. Useful when pattern is something like
-- `".-"` and `line = '"a"aa"', offset = 3`.
if (left == nil) or (match_right - match_left < right - left) then
left, right = match_left, match_right
end
-- Try find smaller match
init = match_left + 1
end
end
-- If didn't find covering match, try to infer from previous and next
if left == nil then
left, right = H.infer_match(
{ left = left_prev, right = right_prev },
{ left = left_next, right = right_next },
offset
)
end
-- If still didn't find anything, return nothing
if left == nil then return end
-- Try make covering match even smaller. Can happen if there are greedy
-- quantifiers. For example:
-- `line = '((()))', pattern = '%(.-%)+', offset = 3`.
-- This approach has some non-working edge cases, but is quite better
-- performance wise than bruteforce "find from current offset"
local line_pattern = '^' .. pattern .. '$'
while
-- Ensure covering
left <= offset
and offset <= (right - 1)
-- Ensure at least 2 symbols
and left < right - 1
-- Ensure match
and line:sub(left, right - 1):find(line_pattern)
do
right = right - 1
end
-- -- Alternative bruteforce approach
-- for i = math.max(offset, left + 1), right - 1 do
-- if line:sub(left, i):find(line_pattern) then
-- right = i
-- break
-- end
-- end
return { left = left, right = right }
end
--stylua: ignore start
H.infer_match = function(prev, next, offset)
local has_prev = prev.left ~= nil and prev.right ~= nil
local has_next = next.left ~= nil and next.right ~= nil
local search_method = H.get_config().search_method
if not (has_prev or has_next) or search_method == 'cover' then return end
if search_method == 'cover_or_prev' then return prev.left, prev.right end
if search_method == 'cover_or_next' then return next.left, next.right end
if search_method == 'cover_or_nearest' then
local dist_prev = has_prev and math.abs(offset - prev.right) or math.huge
local dist_next = has_next and math.abs(next.left - offset) or math.huge
if dist_next <= dist_prev then
return next.left, next.right
else
return prev.left, prev.right
end
end
end
--stylua: ignore end
-- Work with cursor neighborhood ----------------------------------------------
H.get_cursor_neighborhood = function(n_neighbors)
-- Cursor position
local cur_pos = vim.api.nvim_win_get_cursor(0)
-- Convert from 0-based column to 1-based
cur_pos = { line = cur_pos[1], col = cur_pos[2] + 1 }
-- '2d neighborhood': position is determined by line and column
local line_start = math.max(1, cur_pos.line - n_neighbors)