Repository navigation
Expand file tree
/
Copy pathsurround.lua
More file actions
2280 lines (2007 loc) · 93.2 KB
/
Copy pathsurround.lua
File metadata and controls
2280 lines (2007 loc) · 93.2 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
--- *mini.surround* Surround actions
--- *MiniSurround*
---
--- MIT License Copyright (c) 2021 Evgeni Chasnovski
---
--- ==============================================================================
---
--- Fast and feature-rich surrounding. Can be configured to have experience
--- similar to 'tpope/vim-surround' (see |MiniSurround-vim-surround-config|).
---
--- Features:
--- - Actions (all of them are dot-repeatable out of the box and respect
--- |[count]|) with configurable keymappings:
--- - 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.
--- - 't' - tag. In "input" finds tag with same identifier, in "output"
--- prompts user to enter tag name with possible attributes.
--- - All symbols in brackets '()', '[]', '{}', '<>". In "input' represents
--- balanced brackets (open - with whitespace pad, close - without), in
--- "output" - left and right parts of brackets.
--- - '?' - interactive. Prompts user to enter left and right parts.
--- - All other alphanumeric, punctuation, or space characters represent
--- surrounding with identical left and right parts.
---
--- - Configurable search methods to find not only covering but possibly next,
--- previous, or nearest surrounding. See more in |MiniSurround.config|.
---
--- - All actions involving finding surrounding (delete, replace, find,
--- highlight) can be used with suffix that changes search method to find
--- previous/last. See more in |MiniSurround.config|.
---
--- 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.
---
--- 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.
---
--- To stop module from showing non-error feedback, set `config.silent = true`.
---
--- # Example usage ~
---
--- Regular mappings:
--- - `saiw)` - add (`sa`) for inner word (`iw`) parenthesis (`)`).
--- - `saiw?[[<CR>]]<CR>` - add (`sa`) for inner word (`iw`) interactive
--- surrounding (`?`): `[[` for left and `]]` for right.
--- - `2sdf` - delete (`sd`) second (`2`) 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 (`}`).
---
--- Extended mappings (temporary force "prev"/"next" search methods):
--- - `sdnf` - delete (`sd`) next (`n`) function call (`f`).
--- - `srlf(` - replace (`sr`) last (`l`) function call (`f`) with padded
--- bracket (`(`).
--- - `2sfnt` - find (`sf`) second (`2`) next (`n`) tag (`t`).
--- - `2shl}` - highlight (`sh`) last (`l`) second (`2`) curly bracket (`}`).
---
--- # Comparisons ~
---
--- - 'tpope/vim-surround':
--- - 'vim-surround' has completely different, with other focus set of
--- default mappings, while 'mini.surround' has a more coherent set.
--- - 'mini.surround' supports dot-repeat, customized search path (see
--- |MiniSurround.config|), customized specifications (see
--- |MiniSurround-surround-specification|) allowing usage of tree-sitter
--- queries (see |MiniSurround.gen_spec.input.treesitter()|),
--- highlighting and finding surrounding, "last"/"next" extended
--- mappings. While 'vim-surround' does not.
--- - 'machakann/vim-sandwich':
--- - Both have same keybindings for common actions (add, delete, replace).
--- - Otherwise same differences as with 'tpop/vim-surround' (except
--- dot-repeat because 'vim-sandwich' supports it).
--- - 'kylechui/nvim-surround':
--- - 'nvim-surround' is designed after 'tpope/vim-surround' with same
--- default mappings and logic, while 'mini.surround' has mappings
--- similar to 'machakann/vim-sandwich'.
--- - 'mini.surround' has more flexible customization of input surrounding
--- (with composed patterns, region pair(s), search methods).
--- - 'mini.surround' supports |[count]| in both input and output
--- surrounding (see |MiniSurround-count|) while 'nvim-surround' doesn't.
--- - 'mini.surround' supports "last"/"next" extended mappings.
--- - |mini.ai|:
--- - Both use similar logic for finding target: textobject in 'mini.ai'
--- and surrounding pair in 'mini.surround'. While 'mini.ai' uses
--- extraction pattern for separate `a` and `i` textobjects,
--- 'mini.surround' uses it to select left and right surroundings
--- (basically a difference between `a` and `i` textobjects).
--- - Some builtin specifications are slightly different:
--- - Quotes in 'mini.ai' are balanced, in 'mini.surround' they are not.
--- - The 'mini.surround' doesn't have argument surrounding.
--- - Default behavior in 'mini.ai' selects one of the edges into `a`
--- textobject, while 'mini.surround' - both.
---
--- # Highlight groups ~
---
--- * `MiniSurround` - highlighting of requested surrounding.
---
--- To change any highlight group, modify it directly with |:highlight|.
---
--- # Disabling ~
---
--- To disable, set `vim.g.minisurround_disable` (globally) or
--- `vim.b.minisurround_disable` (for a buffer) to `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.
--- Builtin surroundings ~
---
--- This table describes all builtin surroundings along with what they
--- represent. Explanation:
--- - `Key` represents the surrounding identifier: single character which should
--- be typed after action mappings (see |MiniSurround.config.mappings|).
--- - `Name` is a description of surrounding.
--- - `Example line` contains a string for which examples are constructed. The
--- `*` denotes the cursor position over `a` character.
--- - `Delete` shows the result of typing `sd` followed by surrounding identifier.
--- It aims to demonstrate "input" surrounding which is also used in replace
--- with `sr` (surrounding id is typed first), highlight with `sh`, find with
--- `sf` and `sF`.
--- - `Replace` shows the result of typing `sr!` followed by surrounding
--- identifier (with possible follow up from user). It aims to demonstrate
--- "output" surrounding which is also used in adding with `sa` (followed by
--- textobject/motion or in Visual mode).
---
--- Example: typing `sd)` with cursor on `*` (covers `a` character) changes line
--- `!( *a (bb) )!` into `! aa (bb) !`. Typing `sr!)` changes same initial line
--- into `(( aa (bb) ))`.
--- >
--- |Key| Name | Example line | Delete | Replace |
--- |---|---------------|---------------|-------------|-----------------|
--- | ( | Balanced () | !( *a (bb) )! | !aa (bb)! | ( ( aa (bb) ) ) |
--- | [ | Balanced [] | ![ *a [bb] ]! | !aa [bb]! | [ [ aa [bb] ] ] |
--- | { | Balanced {} | !{ *a {bb} }! | !aa {bb}! | { { aa {bb} } } |
--- | < | Balanced <> | !< *a <bb> >! | !aa <bb>! | < < aa <bb> > > |
--- |---|---------------|---------------|-------------|-----------------|
--- | ) | Balanced () | !( *a (bb) )! | ! aa (bb) ! | (( aa (bb) )) |
--- | ] | Balanced [] | ![ *a [bb] ]! | ! aa [bb] ! | [[ aa [bb] ]] |
--- | } | Balanced {} | !{ *a {bb} }! | ! aa {bb} ! | {{ aa {bb} }} |
--- | > | Balanced <> | !< *a <bb> >! | ! aa <bb> ! | << aa <bb> >> |
--- | b | Alias for | !( *a {bb} )! | ! aa {bb} ! | (( aa {bb} )) |
--- | | ), ], or } | | | |
--- |---|---------------|---------------|-------------|-----------------|
--- | q | Alias for | !'aa'*a'aa'! | !'aaaaaa'! | "'aa'aa'aa'" |
--- | | ", ', or ` | | | |
--- |---|---------------|---------------|-------------|-----------------|
--- | ? | User prompt | !e * o! | ! a ! | ee a oo |
--- | |(typed e and o)| | | |
--- |---|---------------|---------------|-------------|-----------------|
--- | t | Tag | !<x>*</x>! | !a! | <y><x>a</x></y> |
--- | | | | | (typed y) |
--- |---|---------------|---------------|-------------|-----------------|
--- | f | Function call | !f(*a, bb)! | !aa, bb! | g(f(*a, bb)) |
--- | | | | | (typed g) |
--- |---|---------------|---------------|-------------|-----------------|
--- | | Default | !_a*a_! | !aaa! | __aaa__ |
--- | | (typed _) | | | |
--- |---|---------------|---------------|-------------|-----------------|
--- <
--- Notes:
--- - All examples assume default `config.search_method`.
--- - Open brackets differ from close brackets by how they treat inner edge
--- whitespace: open includes it left and right parts, close does not.
--- - Output value of `b` alias is same as `)`. For `q` alias - same as `"`.
--- - Default surrounding is activated for all characters which are not
--- configured surrounding identifiers. Notes:
--- - Due to special handling of underlying `x.-x` Lua pattern
--- (see |MiniSurround-search-algorithm|), it doesn't really support
--- non-trivial `[count]` for "cover" search method.
--- - When cursor is exactly on the identifier character while there are
--- two matching candidates on both left and right, the one resulting in
--- region with smaller width is preferred.
---@tag MiniSurround-surround-builtin
--- Note: this is similar to |MiniAi-glossary|.
---
BD0
--- - REGION - table representing region in a buffer. Fields: <from> and
--- <to> for inclusive start and end positions (<to> might be `nil` to
--- describe empty region). Each position is also a table with line <line>
--- and column <col> (both start at 1). Examples: >lua
---
--- { from = { line = 1, col = 1 }, to = { line = 2, col = 1 } }
---
--- -- Empty region
--- { from = { line = 10, col = 10 } }
--- <
--- - REGION PAIR - table representing regions for left and right surroundings.
--- Fields: <left> and <right> with regions. Examples: >lua
---
--- {
--- left = { from = { line = 1, col = 1 }, to = { line = 1, col = 1 } },
--- right = { from = { line = 1, col = 3 } },
--- }
--- <
--- - PATTERN - string describing Lua pattern.
--- - SPAN - interval inside a string (end-exclusive). Like [1, 5). Equal
--- `from` and `to` edges describe empty span at that point.
--- - SPAN `A = [a1, a2)` COVERS `B = [b1, b2)` if every element of
--- `B` is within `A` (`a1 <= b < a2`).
--- It also is described as B IS NESTED INSIDE A.
--- - NESTED PATTERN - array of patterns aimed to describe nested spans.
--- - SPAN MATCHES NESTED PATTERN if there is a sequence of consecutively
--- nested spans each matching corresponding pattern within substring of
--- previous span (or input string for first span). Example: >lua
---
--- -- Nested patterns for balanced `()` with inner space
--- { '%b()', '^. .* .$' }
---
--- -- Example input string (with columns underneath for easier reading):
--- "( ( () ( ) ) )"
--- -- 12345678901234
--- <
--- Here are all matching spans [1, 15) and [3, 13). Both [5, 7) and [8, 10)
--- match first pattern but not second. All other combinations of `(` and `)`
--- don't match first pattern (not balanced).
--- - COMPOSED PATTERN: array with each element describing possible pattern
--- (or array of them) at that place. Composed pattern basically defines all
--- possible combinations of nested pattern (their cartesian product).
--- Examples:
--- 1. Either balanced `()` or balanced `[]` but both with inner edge space: >lua
---
--- -- Composed pattern
--- { { '%b()', '%b[]' }, '^. .* .$' }
---
--- -- Composed pattern expanded into equivalent array of nested patterns
--- { '%b()', '^. .* .$' } -- and
--- { '%b[]', '^. .* .$' }
--- <
--- 2. Either "balanced `()` with inner edge space" or "balanced `[]` with
--- no inner edge space", both with 5 or more characters: >lua
---
--- -- Composed pattern
--- { { { '%b()', '^. .* .$' }, { '%b[]', '^.[^ ].*[^ ].$' } }, '.....' }
---
--- -- Composed pattern expanded into equivalent array of nested patterns
--- { '%b()', '^. .* .$', '.....' } -- and
--- { '%b[]', '^.[^ ].*[^ ].$', '.....' }
--- <
--- - SPAN MATCHES COMPOSED PATTERN if it matches at least one nested pattern
--- from expanded composed pattern.
---@tag MiniSurround-glossary
--- Surround specification is a table with keys:
--- - <input> - defines how to find and extract surrounding for "input"
--- operations (like `delete`). See more in "Input surrounding" section.
--- - <output> - defines what to add on left and right for "output" operations
--- (like `add`). See more in "Output surrounding" section.
---
--- Example of surround info for builtin `)` identifier: >lua
---
--- {
--- input = { '%b()', '^.().*().$' },
--- output = { left = '(', right = ')' }
--- }
--- <
--- # Input surrounding ~
---
--- Specification for input surrounding has a structure of composed pattern
--- (see |MiniSurround-glossary|) with two differences:
--- - Last pattern(s) should have two or four empty capture groups denoting
--- how the last string should be processed to extract surrounding parts:
--- - Two captures represent left part from start of string to first
--- capture and right part - from second capture to end of string.
--- Example: `a()b()c` defines left surrounding as 'a', right - 'c'.
--- - Four captures define left part inside captures 1 and 2, right part -
--- inside captures 3 and 4. Example: `a()()b()c()` defines left part as
--- empty, right part as 'c'.
--- - Allows callable objects (see |vim.is_callable()|) in certain places
--- (enables more complex surroundings in exchange of increase in configuration
--- complexity and computations):
--- - If specification itself is a callable, it will be called without
--- arguments and should return one of:
--- - Composed pattern. Useful for implementing user input. Example of
--- simplified variant of input surrounding for function call with
--- name taken from user prompt: >lua
---
--- function()
--- local left_edge = vim.pesc(vim.fn.input('Function name: '))
--- return { left_edge .. '%b()', '^.-%(().*()%)$' }
--- end
--- <
--- - Single region pair (see |MiniSurround-glossary|). Useful to allow
--- full control over surrounding. Will be taken as is. Example of
--- returning first and last lines of a buffer: >lua
---
--- function()
--- local n_lines = vim.fn.line('$')
--- return {
--- left = {
--- from = { line = 1, col = 1 },
--- to = { line = 1, col = vim.fn.getline(1):len() }
--- },
--- right = {
--- from = { line = n_lines, col = 1 },
--- to = { line = n_lines, col = vim.fn.getline(n_lines):len() }
--- },
--- }
--- end
--- <
--- - Array of region pairs. Useful for incorporating other instruments,
--- like treesitter (see |MiniSurround.gen_spec.treesitter()|). The
--- best region pair will be picked in the same manner as with composed
--- pattern (respecting options `n_lines`, `search_method`, etc.) using
--- output region (from start of left region to end of right region).
--- Example using edges of "best" line with display width more than 80: >lua
---
--- function()
--- local make_line_region_pair = function(n)
--- local left = { line = n, col = 1 }
--- local right = { line = n, col = vim.fn.getline(n):len() }
--- return {
--- left = { from = left, to = left },
--- right = { from = right, to = right },
--- }
--- end
---
--- local res = {}
--- for i = 1, vim.fn.line('$') do
--- if vim.fn.getline(i):len() > 80 then
--- table.insert(res, make_line_region_pair(i))
--- end
--- end
--- return res
--- end
--- <
--- - If there is a callable instead of assumed string pattern, it is expected
--- to have signature `(line, init)` and behave like `pattern:find()`.
--- It should return two numbers representing span in `line` next after
--- or at `init` (`nil` if there is no such span).
--- !IMPORTANT NOTE!: it means that output's `from` shouldn't be strictly
--- to the left of `init` (it will lead to infinite loop). Not allowed as
--- last item (as it should be pattern with captures).
--- Example of matching only balanced parenthesis with big enough width: >lua
---
--- {
--- '%b()',
--- function(s, init)
--- if init > 1 or s:len() < 5 then return end
--- return 1, s:len()
--- end,
--- '^.().*().$'
--- }
--- <
--- More examples: >lua
---
--- -- Pair of balanced brackets from set (used for builtin `b` identifier)
--- { { '%b()', '%b[]', '%b{}' }, '^.().*().$' }
---
--- -- Lua block string
--- { '%[%[().-()%]%]' }
--- <
--- See |MiniSurround.gen_spec| for function wrappers to create commonly used
--- surrounding specifications.
---
--- # Output surrounding ~
---
--- Specification for output can be either a table with <left> and <right> fields,
--- or a callable returning such table (will be called with no arguments).
--- Strings can contain new lines character "\n" to add multiline parts.
---
--- Examples: >lua
---
--- -- Lua block string
--- { left = '[[', right = ']]' }
---
--- -- Brackets on separate lines (indentation is not preserved)
--- { left = '(\n', right = '\n)' }
---
--- -- Function call
--- function()
--- local function_name = MiniSurround.user_input('Function name')
--- return { left = function_name .. '(', right = ')' }
--- end
--- <
---@tag MiniSurround-surround-specification
--- Count with actions
---
--- |[count]| is supported by all actions in the following ways:
---
--- - In add, two types of `[count]` is supported in Normal mode:
--- `[count1]sa[count2][textobject]`. The `[count1]` defines how many times
--- left and right parts of output surrounding will be repeated and `[count2]` is
--- used for textobject.
--- In Visual mode `[count]` is treated as `[count1]`.
--- Example: `2sa3aw)` and `v3aw2sa)` will result into textobject `3aw` being
--- surrounded by `((` and `))`.
---
--- - In delete/replace/find/highlight `[count]` means "find n-th surrounding
--- and execute operator on it".
--- Example: `2sd)` on line `(a(b(c)b)a)` with cursor on `c` will result into
--- `(ab(c)ba)` (and not in `(abcba)` if it would have meant "delete n times").
---@tag MiniSurround-count
--- Search algorithm design
---
--- Search for the input surrounding relies on these principles:
--- - Input surrounding specification is constructed based on surrounding
--- identifier (see |MiniSurround-surround-specification|).
--- - General search is done by converting some 2d buffer region (neighborhood
--- of reference region) into 1d string (each line is appended with `\n`).
--- Then search for a best span matching specification is done inside string
--- (see |MiniSurround-glossary|). After that, span is converted back into 2d
--- region. Note: first search is done inside reference region lines, and
--- only after that - inside its neighborhood within `config.n_lines` (see
--- |MiniSurround.config|).
--- - The best matching span is chosen by iterating over all spans matching
--- surrounding specification and comparing them with "current best".
--- Comparison also depends on reference region (tighter covering is better,
--- otherwise closer is better) and search method (if span is even considered).
--- - Extract pair of spans (for left and right regions in region pair) based
--- on extraction pattern (last item in nested pattern).
--- - For |[count]| greater than 1, steps are repeated with current best match
--- becoming reference region. One such additional step is also done if final
--- region is equal to reference region.
---
--- Notes:
--- - Iteration over all matched spans is done in depth-first fashion with
--- respect to nested pattern.
--- - It is guaranteed that span is compared only once.
--- - For the sake of increasing functionality, during iteration over all
--- matching spans, some Lua patterns in composed pattern are handled
--- specially.
--- - `%bxx` (`xx` is two identical characters). It denotes balanced pair
--- of identical characters and results into "paired" matches. For
--- example, `%b""` for `"aa" "bb"` would match `"aa"` and `"bb"`, but
--- not middle `" "`.
--- - `x.-y` (`x` and `y` are different strings). It results only in matches with
--- smallest width. For example, `e.-o` for `e e o o` will result only in
--- middle `e o`. Note: it has some implications for when parts have
--- quantifiers (like `+`, etc.), which usually can be resolved with
--- frontier pattern `%f[]`.
---@tag MiniSurround-search-algorithm
-- Module definition ==========================================================
local MiniSurround = {}
local H = {}
--- Module setup
---
---@param config table|nil Module config table. See |MiniSurround.config|.
---
---@usage >lua
--- require('mini.surround').setup() -- use default config
--- -- OR
--- 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 default highlighting
H.create_default_hl()
end
--- Module config
---
--- Default values:
---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)
---@text *MiniSurround-vim-surround-config*
--- # 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: >lua
---
--- require('mini.surround').setup({
--- mappings = {
--- add = 'ys',
--- delete = 'ds',
--- find = '',
--- find_left = '',
--- highlight = '',
--- replace = 'cs',
--- update_n_lines = '',
---
--- -- Add this only if you don't want to use extended mappings
--- suffix_last = '',
--- suffix_next = '',
--- },
--- search_method = 'cover_or_next',
--- })
---
--- -- Remap adding surrounding to Visual mode selection
--- vim.keymap.del('x', 'ys')
--- vim.keymap.set('x', 'S', [[:<C-u>lua MiniSurround.add('visual')<CR>]], { silent = true })
---
--- -- Make special mapping for "add surrounding for line"
--- vim.keymap.set('n', 'yss', 'ys_', { remap = true })
--- <
--- # Options ~
---
--- ## Mappings ~
---
--- `config.mappings` defines what mappings are set up for particular actions.
--- By default it uses "prefix style" left hand side starting with "s" (for
--- "surround"): `sa` - "surround add", `sd` - "surround delete", etc.
---
--- Note: if 'timeoutlen' is low enough to cause occasional usage of |s| key
--- (that deletes character under cursor), disable it with the following call: >lua
---
--- vim.keymap.set({ 'n', 'x' }, 's', '<Nop>')
--- <
--- ## 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 specification (see
--- |MiniSurround-surround-specification|).
---
--- General recommendations:
--- - In `config.custom_surroundings` only some data can be defined (like only
--- `output`). Other fields will be taken from builtin surroundings.
--- - Function returning surround info at <input> or <output> fields of
--- specification is helpful when user input is needed (like asking for
--- function name). Use |input()| or |MiniSurround.user_input()|. Return
--- `nil` to stop any current surround operation.
---
--- Examples of using `config.custom_surroundings` (see more examples at
--- |MiniSurround.gen_spec|): >lua
---
--- local surround = require('mini.surround')
--- surround.setup({
--- custom_surroundings = {
--- -- Make `)` insert parts with spaces. `input` pattern stays the same.
--- [')'] = { output = { left = '( ', right = ' )' } },
---
--- -- 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)
--- return { many_star .. '().-()' .. many_star }
--- 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 surrounding for Lua's block string `[[...]]`
--- -- Use this inside autocommand or 'after/ftplugin/lua.lua' file
--- vim.b.minisurround_config = {
--- custom_surroundings = {
--- s = {
--- input = { '%[%[().-()%]%]' },
--- output = { left = '[[', right = ']]' },
--- },
--- },
--- }
--- <
--- ## Respect selection type ~
---
--- Boolean option `config.respect_selection_type` controls whether to respect
--- selection type when adding and deleting surrounding. When enabled:
--- - Linewise adding places surroundings on separate lines while indenting
--- surrounded lines ones.
--- - Deleting surroundings which look like they were the result of linewise
--- adding will act to revert it: delete lines with surroundings and dedent
--- surrounded lines ones.
--- - Blockwise adding places surroundings on whole edges, not only start and
--- end of selection. Note: it doesn't really work outside of text and in
--- presence of multibyte characters; and probably won't due to
--- implementation difficulties.
---
--- ## Search method ~
---
--- Value of `config.search_method` defines how best match search is done.
--- Based on its value, one of the following matches will be selected:
--- - Covering match. Left/right edge is before/after left/right edge of
--- reference region.
--- - Previous match. Left/right edge is before left/right edge of reference
--- region.
--- - Next match. Left/right edge is after left/right edge of reference region.
--- - Nearest match. Whichever is closest among previous and next matches.
---
--- Possible values are:
--- - `'cover'` (default) - use only covering match. Don't use either previous or
--- next; report that there is no surrounding found.
--- - `'cover_or_next'` - use covering match. If not found, use next.
--- - `'cover_or_prev'` - use covering match. If not found, use previous.
--- - `'cover_or_nearest'` - use covering match. If not found, use nearest.
--- - `'next'` - use next match.
--- - `'previous'` - use previous match.
--- - `'nearest'` - use nearest match.
---
--- Note: search is first performed on the reference region lines 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 are found on
--- first stage although covering match might be found in bigger, whole
--- neighborhood. This design is based on observation that most of the time
--- operation is done within reference region lines (usually 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:
--- - `'cover'`: `(a) bbb (c)` -> `(a) bbb (c)` (with message)
--- - `'cover_or_next'`: `(a) bbb (c)` -> `(a) bbb [c]`
--- - `'cover_or_prev'`: `(a) bbb (c)` -> `[a] bbb (c)`
--- - `'cover_or_nearest'`: depends on cursor position.
--- For first and second `b` - as in `cover_or_prev` (as previous match is
--- nearer), for third - as in `cover_or_next` (as next match is nearer).
--- - `'next'`: `(a) bbb (c)` -> `(a) bbb [c]`. Same outcome for `(bbb)`.
--- - `'prev'`: `(a) bbb (c)` -> `[a] bbb (c)`. Same outcome for `(bbb)`.
--- - `'nearest'`: depends on cursor position (same as in `'cover_or_nearest'`).
---
--- ## Search suffixes ~
---
--- To provide more searching possibilities, 'mini.surround' creates extended
--- mappings force "prev" and "next" methods for particular search. It does so
--- by appending mapping with certain suffix: `config.mappings.suffix_last` for
--- mappings which will use "prev" search method, `config.mappings.suffix_next`
--- - "next" search method.
---
--- Notes:
--- - It creates new mappings only for actions involving surrounding search:
--- delete, replace, find (right and left), highlight.
--- - All new mappings behave the same way as if `config.search_method` is set
--- to certain search method. They are dot-repeatable, respect |[count]|, etc.
--- - Supply empty string to disable creation of corresponding set of mappings.
---
--- Example with default values (`n` for `suffix_next`, `l` for `suffix_last`)
--- and initial line `(aa) (bb) (cc)`.
--- - Typing `sdn)` with cursor inside `(aa)` results into `(aa) bb (cc)`.
--- - Typing `sdl)` with cursor inside `(cc)` results into `(aa) bb (cc)`.
--- - Typing `2srn)]` with cursor inside `(aa)` results into `(aa) (bb) [cc]`.
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`
suffix_last = 'l', -- Suffix to search with "prev" method
suffix_next = 'n', -- Suffix to search with "next" method
},
-- Number of lines within which surrounding is searched
n_lines = 20,
-- Whether to respect selection type:
-- - Place surroundings on separate lines in linewise mode.
-- - Place surroundings on each line in blockwise mode.
respect_selection_type = false,
-- How to search for surrounding (first inside current line, then inside
-- neighborhood). One of 'cover', 'cover_or_next', 'cover_or_prev',
-- 'cover_or_nearest', 'next', 'prev', 'nearest'. For more details,
-- see `:h MiniSurround.config`.
search_method = 'cover',
-- Whether to disable showing non-error feedback
silent = false,
}
--minidoc_afterlines_end
-- Module functionality =======================================================
--- 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_spec('output', false)
else
surr_info = H.get_surround_spec('output', true)
end
if surr_info == nil then return '<Esc>' end
-- Extend parts based on provided `[count]` before operator (if this is not
-- from dot-repeat and was done already)
if not surr_info.did_count then
local count = H.cache.count or vim.v.count1
surr_info.left, surr_info.right = surr_info.left:rep(count), surr_info.right:rep(count)
surr_info.did_count = true
end
-- Add surrounding.
-- Possibly deal with linewise and blockwise addition separately
local respect_selection_type = H.get_config().respect_selection_type
if not respect_selection_type or marks.selection_type == 'charwise' then
-- Begin insert from right to not break column numbers
-- Insert after the right mark (`+ 1` is for that)
H.region_replace({ from = { line = marks.second.line, col = marks.second.col + 1 } }, surr_info.right)
H.region_replace({ from = marks.first }, 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())
return
end
if marks.selection_type == 'linewise' then
local from_line, to_line = marks.first.line, marks.second.line
-- Save current range indent and indent surrounded lines
local init_indent = H.get_range_indent(from_line, to_line)
H.shift_indent('>', from_line, to_line)
-- Put cursor on the start of first surrounded line
H.set_cursor_nonblank(from_line)
-- Put surroundings on separate lines
vim.fn.append(to_line, init_indent .. surr_info.right)
vim.fn.append(from_line - 1, init_indent .. surr_info.left)
return
end
if marks.selection_type == 'blockwise' then
-- NOTE: this doesn't work with mix of multibyte and normal characters, as
-- well as outside of text lines.
local from_col, to_col = marks.first.col, marks.second.col
-- - Ensure that `to_col` is to the right of `from_col`. Can be not the
-- case if visual block was selected from "south-west" to "north-east".
from_col, to_col = math.min(from_col, to_col), math.max(from_col, to_col)
for i = marks.first.line, marks.second.line do
H.region_replace({ from = { line = i, col = to_col + 1 } }, surr_info.right)
H.region_replace({ from = { line = i, col = from_col } }, surr_info.left)
end
H.set_cursor(marks.first.line, from_col + surr_info.left:len())
return
end
end
--- Delete surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.delete = function()
-- Find input surrounding region
local surr = H.find_surrounding(H.get_surround_spec('input', true))
if surr == nil then return '<Esc>' end
-- Delete surrounding region. Begin with right to not break column numbers.
H.region_replace(surr.right, {})
H.region_replace(surr.left, {})
-- Set cursor to be on the right of deleted left surrounding
local from = surr.left.from
H.set_cursor(from.line, from.col)
-- Possibly tweak deletion of linewise surrounding. Should act as reverse to
-- linewise addition.
if not H.get_config().respect_selection_type then return end
local from_line, to_line = surr.left.from.line, surr.right.from.line
local is_linewise_delete = from_line < to_line and H.is_line_blank(from_line) and H.is_line_blank(to_line)
if is_linewise_delete then
-- Dedent surrounded lines
H.shift_indent('<', from_line, to_line)
-- Place cursor on first surrounded line
H.set_cursor_nonblank(from_line + 1)
-- Delete blank lines left after deleting surroundings
local buf_id = vim.api.nvim_get_current_buf()
vim.fn.deletebufline(buf_id, to_line)
vim.fn.deletebufline(buf_id, from_line)
end
end
--- Replace surrounding
---
--- No need to use it directly, everything is setup in |MiniSurround.setup|.
MiniSurround.replace = function()
-- Find input surrounding region
local surr = H.find_surrounding(H.get_surround_spec('input', true))
if surr == nil then return '<Esc>' end
-- Get output surround info
local new_surr_info = H.get_surround_spec('output', true)
if new_surr_info == nil then return '<Esc>' end
-- Replace by parts starting from right to not break column numbers
H.region_replace(surr.right, new_surr_info.right)
H.region_replace(surr.left, new_surr_info.left)
-- Set cursor to be on the right of left surrounding
local from = surr.left.from
H.set_cursor(from.line, from.col + 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 region
local surr = H.find_surrounding(H.get_surround_spec('input', true))
if surr == nil then return '<Esc>' end
-- Make array of unique positions to cycle through
local pos_array = H.surr_to_pos_array(surr)
-- 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 region
local surr = H.find_surrounding(H.get_surround_spec('input', true))
if surr == nil then return '<Esc>' end
-- Highlight surrounding region
local config = H.get_config()
local buf_id = vim.api.nvim_get_current_buf()
H.region_highlight(buf_id, surr.left)
H.region_highlight(buf_id, surr.right)
vim.defer_fn(function()
H.region_unhighlight(buf_id, surr.left)
H.region_unhighlight(buf_id, surr.right)
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 '' }
vim.cmd('echohl Question')
-- Use `pcall` to allow `<C-c>` to cancel user input
local ok, res = pcall(vim.fn.input, opts)
vim.cmd([[echohl None | echo '' | redraw]])
-- Stop key listening
on_key(nil, H.ns_id.input)
if not ok or was_cancelled then return end
return res
end
--- Generate common surrounding specifications
---
--- This is a table with two sets of generator functions: <input> and <output>
--- (currently empty). Each is a table with function values generating
--- corresponding surrounding specification.
---
---@seealso |MiniAi.gen_spec|
MiniSurround.gen_spec = { input = {}, output = {} }
--- Treesitter specification for input surrounding
---
--- This is a specification in function form. When called with a pair of
--- treesitter captures, it returns a specification function outputting an
--- array of region pairs derived from <outer> and <inner> captures. It first
--- searches for all matched nodes of outer capture and then completes each one
--- with the biggest match of inner capture inside that node (if any). The result
--- region pair is a difference between regions of outer and inner captures.
---
--- In order for this to work, apart from working treesitter parser for desired
--- language, user should have a reachable language-specific 'textobjects'
--- query (see |vim.treesitter.query.get()| or |get_query()|, depending on your
--- Neovim version).
--- The most straightforward way for this is to have 'textobjects.scm' query
--- file with treesitter captures stored in some recognized path. This is
--- primarily designed to be compatible with plugin
--- 'nvim-treesitter/nvim-treesitter-textobjects', but can be used without it.
---
--- Two most common approaches for having a query file:
--- - Install 'nvim-treesitter/nvim-treesitter-textobjects'. It has curated and
--- well maintained builtin query files for many languages with a standardized
--- capture names, like `call.outer`, `call.inner`, etc.
--- - Manually create file 'after/queries/<language name>/textobjects.scm' in
--- your |$XDG_CONFIG_HOME| directory. It should contain queries with
---
486A
captures (later used to define surrounding parts). See |lua-treesitter-query|.
--- To verify that query file is reachable, run (example for "lua" language,
--- output should have at least an intended file): >vim
---
--- :lua print(vim.inspect(vim.treesitter.query.get_files('lua','textobjects')))
--- <
--- Example configuration for function definition textobject with
--- 'nvim-treesitter/nvim-treesitter-textobjects' captures: >lua
---
--- local ts_input = require('mini.surround').gen_spec.input.treesitter
--- require('mini.surround').setup({
--- custom_surroundings = {
--- -- Use tree-sitter to search for function call
--- f = {
--- input = ts_input({ outer = '@call.outer', inner = '@call.inner' })
--- },
--- }
--- })
--- <
--- Notes:
--- - By default query is done using 'nvim-treesitter' plugin if it is present
--- (falls back to builtin methods otherwise). This allows for a more
--- advanced features (like multiple buffer languages, custom directives, etc.).
--- See `opts.use_nvim_treesitter` for how to disable this.
--- - It uses buffer's |filetype| to determine query language.