Repository navigation
Expand file tree
/
Copy pathai.lua
More file actions
2003 lines (1763 loc) · 82.4 KB
/
Copy pathai.lua
File metadata and controls
2003 lines (1763 loc) · 82.4 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.ai* Extend and create a/i textobjects
--- *MiniAi*
---
--- MIT License Copyright (c) 2022 Evgeni Chasnovski
---
--- ==============================================================================
---
--- Enhance some builtin |text-objects| (like |a(|, |a)|, |a'|, and more),
--- create new ones (like `a*`, `a<Space>`, `af`, `a?`, and more), and allow
--- user to create their own.
---
--- Features:
--- - Customizable creation of `a`/`i` textobjects using Lua patterns and functions.
--- Supports:
--- - Dot-repeat.
--- - |v:count|.
--- - Different search methods (see |MiniAi.config|).
--- - Consecutive application (update selection without leaving Visual mode).
--- - Aliases for multiple textobjects.
---
--- - Comprehensive builtin textobjects (see more in |MiniAi-textobject-builtin|):
--- - Balanced brackets (with and without whitespace) plus alias.
--- - Balanced quotes plus alias.
--- - Function call.
--- - Argument.
--- - Tag.
--- - Derived from user prompt.
--- - Default for punctuation, digit, or whitespace single character.
---
--- - Motions for jumping to left/right edge of textobject.
---
--- - Set of specification generators to tweak some builtin textobjects (see
--- |MiniAi.gen_spec|).
---
--- - Treesitter textobjects (through |MiniAi.gen_spec.treesitter()| helper).
---
--- This module works by defining mappings for both `a` and `i` in Visual and
--- Operator-pending mode. After typing, they wait for single character user input
--- treated as textobject identifier and apply resolved textobject specification
--- (fall back to other mappings if can't find proper textobject id). For more
--- information see |MiniAi-textobject-specification| and |MiniAi-algorithm|.
---
--- Known issues which won't be resolved:
--- - Search for builtin textobjects is done mostly using Lua patterns
--- (regex-like approach). Certain amount of false positives is to be expected.
---
--- - During search for builtin textobjects there is no distinction if it is
--- inside string or comment. For example, in the following case there will
--- be wrong match for a function call: `f(a = ")", b = 1)`.
---
--- General rule of thumb: any instrument using available parser for document
--- structure (like treesitter) will usually provide more precise results. This
--- module has builtins mostly for plain text textobjects which are useful
--- most of the times (like "inside brackets", "around quotes/underscore", etc.).
--- For advanced use cases define function specification for custom textobjects.
---
--- What it doesn't (and probably won't) do:
--- - Have special operators to specially handle whitespace (like `I` and `A`
--- in 'targets.vim'). Whitespace handling is assumed to be done inside
--- textobject specification (like `i(` and `i)` handle whitespace differently).
---
--- # Setup~
---
--- This module needs a setup with `require('mini.ai').setup({})` (replace
--- `{}` with your `config` table). It will create global Lua table `MiniAi`
--- which you can use for scripting or manually (with `:lua MiniAi.*`).
---
--- See |MiniAi.config| for available config settings.
---
--- You can override runtime config settings (like `config.custom_textobjects`)
--- locally to buffer inside `vim.b.miniai_config` which should have same structure
--- as `MiniAi.config`. See |mini.nvim-buffer-local-config| for more details.
---
--- To stop module from showing non-error feedback, set `config.silent = true`.
---
--- # Comparisons~
---
--- - 'wellle/targets.vim':
--- - Has limited support for creating own textobjects: it is constrained
--- to pre-defined detection rules. 'mini.ai' allows creating own rules
--- via Lua patterns and functions (see |MiniAi-textobject-specification|).
--- - Doesn't provide any programmatical API for getting information about
--- textobjects. 'mini.ai' does it via |MiniAi.find_textobject()|.
--- - Has no implementation of "moving to edge of textobject". 'mini.ai'
--- does it via |MiniAi.move_cursor()| and `g[` and `g]` default mappings.
--- - Has elaborate ways to control searching of the next textobject.
--- 'mini.ai' relies on handful of 'config.search_method'.
--- - Implements `A`, `I` operators. 'mini.ai' does not by design: it is
--- assumed to be a property of textobject, not operator.
--- - Doesn't implement "function call" and "user prompt" textobjects.
--- 'mini.ai' does (with `f` and `?` identifiers).
--- - Has limited support for "argument" textobject. Although it works in
--- most situations, it often misdetects commas as argument separator
--- (like if it is inside quotes or `{}`). 'mini.ai' deals with these cases.
--- - 'nvim-treesitter/nvim-treesitter-textobjects':
--- - Along with textobject functionality provides a curated and maintained
--- set of popular textobject queries for many languages (which can power
--- |MiniAi.gen_spec.treesitter()| functionality).
--- - Operates with custome treesitter directives (see
--- |lua-treesitter-directives|) allowing more fine-tuned textobjects.
--- - Implements only textobjects based on treesitter.
--- - Doesn't support |v:count|.
--- - Doesn't support multiple search method (basically, only 'cover').
--- - Doesn't support consecutive application of target textobject.
---
--- # Disabling~
---
--- To disable, set `vim.g.miniai_disable` (globally) or `vim.b.miniai_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 textobjects~
---
--- This table describes all builtin textobjects along with what they
--- represent. Explanation:
--- - `Key` represents the textobject identifier: single character which should
--- be typed after `a`/`i`.
--- - `Name` is a description of textobject.
--- - `Example line` contains a string for which examples are constructed. The
--- `*` denotes the cursor position.
--- - `a`/`i` describe inclusive region representing `a` and `i` textobjects.
--- Use numbers in separators for easier navigation.
--- - `2a`/`2i` describe either `2a`/`2i` (support for |v:count|) textobjects
--- or `a`/`i` textobject followed by another `a`/`i` textobject (consecutive
--- application leads to incremental selection).
---
--- Example: typing `va)` with cursor on `*` leads to selection from column 2
--- to column 12. Another typing `a)` changes selection to [1; 13]. Also, besides
--- visual selection, any |operator| can be used or `g[`/`g]` motions to move
--- to left/right edge of `a` textobject.
--- >
--- |Key| Name | Example line | a | i | 2a | 2i |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | ( | Balanced () | (( *a (bb) )) | | | | |
--- | [ | Balanced [] | [[ *a [bb] ]] | [2;12] | [4;10] | [1;13] | [2;12] |
--- | { | Balanced {} | {{ *a {bb} }} | | | | |
--- | < | Balanced <> | << *a <bb> >> | | | | |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | ) | Balanced () | (( *a (bb) )) | | | | |
--- | ] | Balanced [] | [[ *a [bb] ]] | | | | |
--- | } | Balanced {} | {{ *a {bb} }} | [2;12] | [3;11] | [1;13] | [2;12] |
--- | > | Balanced <> | << *a <bb> >> | | | | |
--- | b | Alias for | [( *a {bb} )] | | | | |
--- | | ), ], or } | | | | | |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | " | Balanced " | "*a" " bb " | | | | |
--- | ' | Balanced ' | '*a' ' bb ' | | | | |
--- | ` | Balanced ` | `*a` ` bb ` | [1;4] | [2;3] | [6;11] | [7;10] |
--- | q | Alias for | '*a' " bb " | | | | |
--- | | ", ', or ` | | | | | |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | ? | User prompt | e*e o e o o | [3;5] | [4;4] | [7;9] | [8;8] |
--- | |(typed e and o)| | | | | |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | t | Tag | <x>*</x><y>b</y> | [1;8] | [4;4] | [9;16] |[12;12] |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | f | Function call | f(a, g(*b, c) ) | [6;13] | [8;12] | [1;15] | [3;14] |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | a | Argument | f(*a, g(b, c) ) | [3;5] | [3;4] | [5;14] | [7;13] |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- | | Default | | | | | |
--- | | (digits, | aa_*b__cc___ | [4;7] | [4;5] | [8;12] | [8;9] |
--- | | punctuation, | (example for _) | | | | |
--- | | or whitespace)| | | | | |
--- |---|---------------|-1234567890123456-|--------|--------|--------|--------|
--- <
--- Notes:
--- - All examples assume default `config.search_method`.
--- - Open brackets differ from close brackets by how they treat inner edge
--- whitespace for `i` textobject: open ignores it, close - includes.
--- - Default textobject is activated for identifiers from digits (0, ..., 9),
--- punctuation (like `_`, `*`, `,`, etc.), whitespace (space, tab, etc.).
--- They are designed to be treated as separators, so include only right edge
--- in `a` textobject. To include both edges, use custom textobjects
--- (see |MiniAi-textobject-specification| and |MiniAi.config|).
---@tag MiniAi-textobject-builtin
--- - 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:
--- - `{ from = { line = 1, col = 1 }, to = { line = 2, col = 1 } }`
--- - `{ from = { line = 10, col = 10 } }` - empty region.
--- - 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:
--- Nested patterns: `{ '%b()', '^. .* .$' }` (balanced `()` with inner space)
--- Input string: `( ( () ( ) ) )`
--- `123456789012345`
--- Here are all matching spans [1, 15) and [3, 13). Both [5, 7) and [8, 10)
--- match first pattern but not second. All other combinations of `(` and `)`
--- don't match first pattern (not balanced).
--- - COMPOSED PATTERN: array with each element describing possible pattern
--- (or array of them) at that place. Composed pattern basically defines all
--- possible combinations of nested pattern (their cartesian product).
--- Examples:
--- 1. Composed pattern: `{ { '%b()', '%b[]' }, '^. .* .$' }`
--- Composed pattern expanded into equivalent array of nested patterns:
--- `{ '%b()', '^. .* .$' }` and `{ '%b[]', '^. .* .$' }`
--- Description: either balanced `()` or balanced `[]` but both with
--- inner edge space.
--- 2. Composed pattern:
--- `{ { { '%b()', '^. .* .$' }, { '%b[]', '^.[^ ].*[^ ].$' } }, '.....' }`
--- Composed pattern expanded into equivalent array of nested patterns:
--- `{ '%b()', '^. .* .$', '.....' }` and
--- `{ '%b[]', '^.[^ ].*[^ ].$', '.....' }`
--- Description: either "balanced `()` with inner edge space" or
--- "balanced `[]` with no inner edge space", both with 5 or more characters.
--- - SPAN MATCHES COMPOSED PATTERN if it matches at least one nested pattern
--- from expanded composed pattern.
---@tag MiniAi-glossary
--- Textobject specification has a structure of composed pattern (see
--- |MiniAi-glossary|) with two differences:
--- - Last pattern(s) should have even number of empty capture groups denoting
--- how the last string should be processed to extract `a` or `i` textobject:
--- - Zero captures mean that whole string represents both `a` and `i`.
--- Example: `xxx` will define textobject matching string `xxx` literally.
--- - Two captures represent `i` textobject inside of them. `a` - whole string.
--- Example: `x()x()x` defines `a` textobject to be `xxx`, `i` - middle `x`.
--- - Four captures define `a` textobject inside captures 1 and 4, `i` -
--- inside captures 2 and 3. Example: `x()()x()x()` defines `a`
--- textobject to be last `xx`, `i` - middle `x`.
--- - Allows callable objects (see |vim.is_callable()|) in certain places
--- (enables more complex textobjects in exchange of increase in configuration
--- complexity and computations):
--- - If specification itself is a callable, it will be called with the same
--- arguments as |MiniAi.find_textobject()| and should return one of:
--- - Composed pattern. Useful for implementing user input. Example of
--- simplified variant of textobject for function call with name taken
--- from user prompt:
--- >
--- function()
--- local left_edge = vim.pesc(vim.fn.input('Function name: '))
--- return { string.format('%s+%%b()', left_edge), '^.-%(().*()%)$' }
--- end
--- <
--- - Single output region. Useful to allow full control over
--- textobject. Will be taken as is. Example of returning whole buffer:
--- >
--- function()
--- local from = { line = 1, col = 1 }
--- local to = {
--- line = vim.fn.line('$'),
--- col = math.max(vim.fn.getline('$'):len(), 1)
--- }
--- return { from = from, to = to }
--- end
--- <
--- - Array of output region(s). Useful for incorporating other
--- instruments, like treesitter (see |MiniAi.gen_spec.treesitter()|).
--- The best region will be picked in the same manner as with composed
--- pattern (respecting options `n_lines`, `search_method`, etc.).
--- Example of selecting "best" line with display width more than 80:
--- >
--- function(_, _, _)
--- local res = {}
--- for i = 1, vim.api.nvim_buf_line_count(0) do
--- local cur_line = vim.fn.getline(i)
--- if vim.fn.strdisplaywidth(cur_line) > 80 then
--- local region = {
--- from = { line = i, col = 1 },
--- to = { line = i, col = cur_line:len() },
--- }
--- table.insert(res, region)
--- end
--- end
--- return res
--- end
--- <
--- - If there is a callable instead of assumed string pattern, it is expected
--- to have signature `(line, init)` and behave like `pattern:find()`.
--- It should return two numbers representing span in `line` next after
--- or at `init` (`nil` if there is no such span).
--- !IMPORTANT NOTE!: it means that output's `from` shouldn't be strictly
--- to the left of `init` (it will lead to infinite loop). Not allowed as
--- last item (as it should be pattern with captures).
--- Example of matching only balanced parenthesis with big enough width:
--- >
--- {
--- '%b()',
--- function(s, init)
--- if init > 1 or s:len() < 5 then return end
--- return 1, s:len()
--- end,
--- '^.().*().$'
--- }
--- >
--- More examples:
--- - See |MiniAi.gen_spec| for function wrappers to create commonly used
--- textobject specifications.
---
--- - Pair of balanced brackets from set (used for builtin `b` identifier):
--- `{ { '%b()', '%b[]', '%b{}' }, '^.().*().$' }`
---
--- - Imitate word ignoring digits and punctuation (supports only Latin alphabet):
--- `{ '()()%f[%w]%w+()[ \t]*()' }`
---
--- - Word with camel case support (also supports only Latin alphabet):
--- `{`
--- `{`
--- `'%u[%l%d]+%f[^%l%d]',`
--- `'%f[%S][%l%d]+%f[^%l%d]',`
--- `'%f[%P][%l%d]+%f[^%l%d]',`
--- `'^[%l%d]+%f[^%l%d]',`
--- `},`
--- `'^().*()$'`
--- `}`
---
--- - Number: `{ '%f[%d]%d+' }`
---
--- - Date in 'YYYY-MM-DD' format: `{ '()%d%d%d%d%-%d%d%-%d%d()' }`
---
--- - Lua block string: `{ '%[%[().-()%]%]' }`
---@tag MiniAi-textobject-specification
--- Algorithm design
---
--- Search for the textobjects relies on these principles:
--- - It uses same input data as described in |MiniAi.find_textobject()|,
--- i.e. whether it is `a` or `i` textobject, its identifier, reference region, etc.
--- - Textobject specification is constructed based on textobject identifier
--- (see |MiniAi-textobject-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 textobject specification is done
--- inside string (see |MiniAi-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 |MiniAi.config|).
--- - The best matching span is chosen by iterating over all spans matching
--- textobject 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 span based on extraction pattern (last item in nested pattern).
--- - If task is to perform a consecutive search (`opts.n_times` is 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 (this enables consecutive application).
---
--- 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[]` (see examples in |MiniAi-textobject-specification|).
---@tag MiniAi-algorithm
-- Module definition ==========================================================
local MiniAi = {}
local H = {}
--- Module setup
---
---@param config table|nil Module config table. See |MiniAi.config|.
---
---@usage `require('mini.ai').setup({})` (replace `{}` with your `config` table)
MiniAi.setup = function(config)
-- Export module
_G.MiniAi = MiniAi
-- Setup config
config = H.setup_config(config)
-- Apply config
H.apply_config(config)
end
--- Module config
---
--- Default values:
---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)
---@text # Options ~
---
--- ## Custom textobjects ~
---
--- Each named entry of `config.custom_textobjects` is a textobject with
--- that identifier and specification (see |MiniAi-textobject-specification|).
--- They are also used to override builtin ones (|MiniAi-textobject-builtin|).
--- Supply non-valid input (not in specification format) to disable module's
--- builtin textobject in favor of external or Neovim's builtin mapping.
---
--- Examples:
--- >
--- require('mini.ai').setup({
--- custom_textobjects = {
--- -- Tweak argument textobject
--- a = require('mini.ai').gen_spec.argument({ brackets = { '%b()' } }),
---
--- -- Disable brackets alias in favor of builtin block textobject
--- b = false,
---
--- -- Now `vax` should select `xxx` and `vix` - middle `x`
--- x = { 'x()x()x' },
---
--- -- Whole buffer
--- g = function()
--- local from = { line = 1, col = 1 }
--- local to = {
--- line = vim.fn.line('$'),
--- col = math.max(vim.fn.getline('$'):len(), 1)
--- }
--- return { from = from, to = to }
--- end
--- }
--- })
---
--- -- Use `vim.b.miniai_config` to customize per buffer
--- -- Example of specification useful for Markdown files:
--- local spec_pair = require('mini.ai').gen_spec.pair
--- vim.b.miniai_config = {
--- custom_textobjects = {
--- ['*'] = spec_pair('*', '*', { type = 'greedy' }),
--- ['_'] = spec_pair('_', '_', { type = 'greedy' }),
--- },
--- }
--- <
--- There are more example specifications in |MiniAi-textobject-specification|.
---
--- ## 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'` - use only covering match. Don't use either previous or
--- next; report that there is no textobject found.
--- - `'cover_or_next'` (default) - 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.
--- - `'prev'` - 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'`, "prev" or
--- "next" textobject 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 what `a)` textobject is based on a value of
--- `'config.search_method'` when cursor is inside `bbb` word:
--- - `'cover'`: `(a) bbb (c)` -> none
--- - `'cover_or_next'`: `(a) bbb (c)` -> `(c)`
--- - `'cover_or_prev'`: `(a) bbb (c)` -> `(a)`
--- - `'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)` -> `(c)`. Same outcome for `(bbb)`.
--- - `'prev'`: `(a) bbb (c)` -> `(a)`. Same outcome for `(bbb)`.
--- - `'nearest'`: depends on cursor position (same as in `'cover_or_nearest'`).
---
--- ## Mappings~
---
--- Mappings `around_next`/`inside_next` and `around_last`/`inside_last` are
--- essentially `around`/`inside` but using search method `'next'` and `'prev'`.
MiniAi.config = {
-- Table with textobject id as fields, textobject specification as values.
-- Also use this to disable builtin textobjects. See |MiniAi.config|.
custom_textobjects = nil,
-- Module mappings. Use `''` (empty string) to disable one.
mappings = {
-- Main textobject prefixes
around = 'a',
inside = 'i',
-- Next/last textobjects
around_next = 'an',
inside_next = 'in',
around_last = 'al',
inside_last = 'il',
-- Move cursor to corresponding edge of `a` textobject
goto_left = 'g[',
goto_right = 'g]',
},
-- Number of lines within which textobject is searched
n_lines = 50,
-- How to search for object (first inside current line, then inside
-- neighborhood). One of 'cover', 'cover_or_next', 'cover_or_prev',
-- 'cover_or_nearest'
10BC8
, 'next', 'prev', 'nearest'.
search_method = 'cover_or_next',
-- Whether to disable showing non-error feedback
silent = false,
}
--minidoc_afterlines_end
-- Module functionality =======================================================
--- Find textobject region
---
---@param ai_type string One of `'a'` or `'i'`.
---@param id string Single character string representing textobject id. It is
--- used to get specification which is later used to compute textobject region.
--- Note: if specification is a function, it is called with all present
--- arguments (`opts` is populated with default arguments).
---@param opts table|nil Options. Possible fields:
--- - <n_lines> - Number of lines within which textobject is searched.
--- Default: `config.n_lines` (see |MiniAi.config|).
--- - <n_times> - Number of times to perform a consecutive search. Each one
--- is done with reference region being previous found textobject region.
--- Default: 1.
--- - <reference_region> - region to try to cover (see |MiniAi-glossary|). It
--- is guaranteed that output region will not be inside or equal to this one.
--- Default: empty region at cursor position.
--- - <search_method> - Search method. Default: `config.search_method`.
---
---@return table|nil Region of textobject or `nil` if no textobject different
--- from `opts.reference_region` was consecutively found `opts.n_times` times.
MiniAi.find_textobject = function(ai_type, id, opts)
if not (ai_type == 'a' or ai_type == 'i') then H.error([[`ai_type` should be one of 'a' or 'i'.]]) end
opts = vim.tbl_deep_extend('force', H.get_default_opts(), opts or {})
H.validate_search_method(opts.search_method)
-- Get textobject specification
local tobj_spec = H.get_textobject_spec(id, { ai_type, id, opts })
if tobj_spec == nil then return end
if H.is_region(tobj_spec) then return tobj_spec end
-- Find region
local res = H.find_textobject_region(tobj_spec, ai_type, opts)
if res == nil then
local msg = string.format(
[[No textobject %s found covering region%s within %d line%s and `search_method = '%s'`.]],
vim.inspect(ai_type .. id),
opts.n_times == 1 and '' or (' %s times'):format(opts.n_times),
opts.n_lines,
opts.n_lines == 1 and '' or 's',
opts.search_method
)
H.message(msg)
end
return res
end
--- Move cursor to edge of textobject
---
---@param side string One of `'left'` or `'right'`.
---@param ai_type string One of `'a'` or `'i'`.
---@param id string Single character string representing textobject id.
---@param opts table|nil Same as in |MiniAi.find_textobject()|.
--- `opts.n_times` means number of *actual* jumps (important when cursor
--- already on the potential jump spot).
MiniAi.move_cursor = function(side, ai_type, id, opts)
if not (side == 'left' or side == 'right') then H.error([[`side` should be one of 'left' or 'right'.]]) end
opts = opts or {}
local init_pos = vim.api.nvim_win_get_cursor(0)
-- Compute single textobject first to find out if it would move the cursor.
-- If not, then eventual `n_times` should be bigger by 1 to imitate `n_times`
-- *actual* jumps. This implements consecutive jumps and has logic of "If
-- cursor is strictly inside region, move to its side first".
local new_opts = vim.tbl_deep_extend('force', opts, { n_times = 1 })
local tobj_single = MiniAi.find_textobject(ai_type, id, new_opts)
if tobj_single == nil then return end
local tobj_side = side == 'left' and 'from' or 'to'
-- Allow empty region
tobj_single.to = tobj_single.to or tobj_single.from
new_opts.n_times = opts.n_times or 1
if (init_pos[1] == tobj_single[tobj_side].line) and (init_pos[2] == tobj_single[tobj_side].col - 1) then
new_opts.n_times = new_opts.n_times + 1
end
-- Compute actually needed textobject while avoiding unnecessary computation
-- in a most common usage (`v:count1 == 1`)
local pos = tobj_single[tobj_side]
if new_opts.n_times > 1 then
local tobj = MiniAi.find_textobject(ai_type, id, new_opts)
if tobj == nil then return end
tobj.to = tobj.to or tobj.from
pos = tobj[tobj_side]
end
-- Move cursor and open enough folds
vim.api.nvim_win_set_cursor(0, { pos.line, pos.col - 1 })
vim.cmd('normal! zv')
end
--- Generate common textobject specifications
---
--- This is a table with function elements. Call to actually get specification.
---
--- Example: >
--- local gen_spec = require('mini.ai').gen_spec
--- require('mini.ai').setup({
--- custom_textobjects = {
--- -- Tweak argument to be recognized only inside `()` between `;`
--- a = gen_spec.argument({ brackets = { '%b()' }, separator = ';' }),
---
--- -- Tweak function call to not detect dot in function name
--- f = gen_spec.function_call({ name_pattern = '[%w_]' }),
---
--- -- Function definition (needs treesitter queries with these captures)
--- F = gen_spec.treesitter({ a = '@function.outer', i = '@function.inner' }),
---
--- -- Make `|` select both edges in non-balanced way
--- ['|'] = gen_spec.pair('|', '|', { type = 'non-balanced' }),
--- }
--- })
MiniAi.gen_spec = {}
--- Argument specification
---
--- Argument textobject (has default `a` identifier) is a region inside
--- balanced bracket between allowed not excluded separators. Use this function
--- to tweak how it works.
---
--- Examples:
--- - `argument({ brackets = { '%b()' } })` will search for an argument only
--- inside balanced `()`.
--- - `argument({ separator = '[,;]' })` will treat both `,` and `;` as separators.
--- - `argument({ exclude_regions = { '%b()' } })` will exclude separators
--- which are inside balanced `()` (inside outer brackets).
---
---@param opts table|nil Options. Allowed fields:
--- - <brackets> - array of patterns for outer balanced brackets.
--- Default: `{ '%b()', '%b[]', '%b{}' }` (any `()`, `[]`, or `{}` can
--- enclose arguments).
--- - <separator> - separator pattern. Default: `','`.
--- One of the practical usages of this option is to include whitespace
--- around character to be a part of separator. For example, `'%s*,%s*'`
--- will treat as separator not only ',', but its possible surrounding
--- whitespace. This has both positive and negative effects. On one hand,
--- `daa` executed over the first argument will delete whitespace after
--- first comma, leading to a more expected outcome. On the other hand it
--- is ambiguous which argument is picked when cursor is over whitespace
--- near the character separator.
--- - <exclude_regions> - array with patterns for regions inside which
--- separators will be ignored.
--- Default: `{ '%b""', "%b''", '%b()', '%b[]', '%b{}' }` (separators
--- inside balanced quotes or brackets are ignored).
MiniAi.gen_spec.argument = function(opts)
opts = vim.tbl_deep_extend('force', {
brackets = { '%b()', '%b[]', '%b{}' },
separator = ',',
exclude_regions = { '%b""', "%b''", '%b()', '%b[]', '%b{}' },
}, opts or {})
local brackets, separator, exclude_regions = opts.brackets, opts.separator, opts.exclude_regions
local res = {}
-- Match brackets
res[1] = brackets
-- Match argument with both left and right separators/brackets
res[2] = function(s, init)
-- Cache string separators per spec as they are used multiple times.
-- Storing per spec allows coexistence of several argument specifications.
H.cache.argument_sep_spans = H.cache.argument_sep_spans or {}
H.cache.argument_sep_spans[res] = H.cache.argument_sep_spans[res] or {}
local sep_spans = H.cache.argument_sep_spans[res][s] or H.arg_get_separator_spans(s, separator, exclude_regions)
H.cache.argument_sep_spans[res][s] = sep_spans
-- Return span fully on right of `init`, `nil` otherwise
-- For first argument returns left bracket; for last - right one.
for i = 1, #sep_spans - 1 do
if init <= sep_spans[i][1] then return sep_spans[i][1], sep_spans[i + 1][2] end
end
return nil
end
-- Make extraction part
--
-- Extraction of `a` type depends on argument number, `i` - as `a` but
-- without separators and inner whitespace. The reason for this complex
-- solution are the following requirements:
-- - Don't match argument region when cursor is on the outer bracket.
-- Example: `f(xxx)` should select argument only when cursor is on 'x'.
-- - Don't select edge whitespace for first and last argument BUT MATCH WHEN
-- CURSOR IS ON THEM which needs to match edge whitespace right until the
-- extraction part. This is useful when working with padded brackets.
-- Example for `f( xx , yy )`:
-- - `a` object should select 'xx ,' when cursor is on all ' xx ';
-- should select ', yy' when cursor is on all ' yy '.
-- - `i` object should select 'xx' when cursor is on all ' xx ';
-- should select 'yy' when cursor is on all ' yy '.
--
-- At this stage whether argument is first, middle, last, or single is
-- determined by presence of matching separator at either left or right edge.
-- If edge matches separator pattern - it has separator. If not - a bracket.
local left_edge_separator = '^' .. separator
local find_after_left_separator = function(s)
local _, sep_end = s:find(left_edge_separator)
if sep_end == nil then return nil end
return sep_end + 1
end
local find_after_left_bracket = function(s)
local left_sep = find_after_left_separator(s)
if left_sep ~= nil then return nil end
return 2
end
local right_edge_sep = separator .. '$'
local find_before_right_separator = function(s)
local sep_start, _ = s:find(right_edge_sep)
if sep_start == nil then return nil end
return sep_start - 1
end
local find_before_right_bracket = function(s)
local right_sep = find_before_right_separator(s)
if right_sep ~= nil then return nil end
return s:len() - 1
end
local match_and_include = function(left_type, left_include, right_type, right_include)
local find_after_left = left_type == 'bracket' and find_after_left_bracket or find_after_left_separator
local find_before_right = right_type == 'bracket' and find_before_right_bracket or find_before_right_separator
return function(s, init)
-- Match only once
if init > 1 then return nil end
-- Make sure that string matches left and right targets
local left_after, right_before = find_after_left(s), find_before_right(s)
if left_after == nil or right_before == nil then return nil end
-- Possibly include matched edge targets
local left = left_include and 1 or left_after
local right = right_include and s:len() or right_before
return left, right
end
end
local extract_first_arg = '^%s*()().-()%s*' .. separator .. '()$'
local extract_nonfirst_arg = '^()' .. separator .. '%s*().-()()%s*$'
local extract_single_arg = '^%s*().-()%s*$'
res[3] = {
-- First argument. Include right separator, exclude left whitespace.
{ match_and_include('bracket', false, 'separator', true), extract_first_arg },
-- Middle argument. Include only left separator.
{ match_and_include('separator', true, 'separator', false), extract_nonfirst_arg },
-- Last argument. Include left separator, exclude right whitespace.
-- NOTE: it misbehaves for whitespace argument. It's OK because it's rare.
{ match_and_include('separator', true, 'bracket', false), extract_nonfirst_arg },
-- Single argument. Include both whitespace (makes `aa` and `ia` differ).
{ match_and_include('bracket', false, 'bracket', false), extract_single_arg },
}
return res
end
--- Function call specification
---
--- Function call textobject (has default `f` identifier) is a region with some
--- characters followed by balanced `()`. Use this function to tweak how it works.
---
--- Example:
--- - `function_call({ name_pattern = '[%w_]' })` will recognize function name with
--- only alphanumeric or underscore (not dot).
---
---@param opts table|nil Optsion. Allowed fields:
--- - <name_pattern> - string pattern of character set allowed in function name.
--- Default: `'[%w_%.]'` (alphanumeric, underscore, or dot).
--- Note: should be enclosed in `[]`.
MiniAi.gen_spec.function_call = function(opts)
opts = vim.tbl_deep_extend('force', { name_pattern = '[%w_%.]' }, opts or {})
-- Use frontier pattern to select widest possible name
return { '%f' .. opts.name_pattern .. opts.name_pattern .. '+%b()', '^.-%(().*()%)$' }
end
--- Pair specification
---
--- Use it to define textobject for region surrounded with `left` from left and
--- `right` from right. The `a` textobject includes both edges, `i` - excludes them.
---
--- Region can be one of several types (controlled with `opts.type`). All
--- examples are for default search method, `a` textobject, and use `'_'` as
--- both `left` and `right`:
--- - Non-balanced (`{ type = 'non-balanced' }`), default. Equivalent to using
--- `x.-y` as first pattern. Example: on line '_a_b_c_' it consecutively
--- matches '_a_', '_b_', '_c_'.
--- - Balanced (`{ type = 'balanced' }`). Equivalent to using `%bxy` as first
--- pattern. Example: on line '_a_b_c_' it consecutively matches '_a_', '_c_'.
--- Note: both `left` and `right` should be single character.
--- - Greedy (`{ type = 'greedy' }`). Like non-balanced but will select maximum
--- consecutive `left` and `right` edges. Example: on line '__a__b_' it
--- consecutively selects '__a__' and '__b_'. Note: both `left` and `right`
--- should be single character.
---
---@param left string Left edge.
---@param right string Right edge.
---@param opts table|nil Options. Possible fields:
--- - <type> - Type of a pair. One of `'non-balanced'` (default), `'balanced'`,
--- `'greedy'`.
MiniAi.gen_spec.pair = function(left, right, opts)
if not (type(left) == 'string' and type(right) == 'string') then
H.error('Both `left` and `right` should be strings.')
end
opts = vim.tbl_deep_extend('force', { type = 'non-balanced' }, opts or {})
if (opts.type == 'balanced' or opts.type == 'greedy') and not (left:len() == 1 and right:len() == 1) then
local msg =
string.format([[Both `left` and `right` should be single character for `opts.type == '%s'`.]], opts.type)
H.error(msg)
end
local left_esc = vim.pesc(left)
local right_esc = vim.pesc(right)
if opts.type == 'balanced' then return { string.format('%%b%s%s', left, right), '^.().*().$' } end
if opts.type == 'non-balanced' then return { string.format('%s().-()%s', left_esc, right_esc) } end
if opts.type == 'greedy' then
return { string.format('%%f[%s]%s+()[^%s]-()%s+%%f[^%s]', left_esc, left_esc, left_esc, right_esc, right_esc) }
end
H.error([[`opts.type` should be one of 'balanced', 'non-balanced', 'greedy'.]])
end
--- Treesitter specification
---
--- This is a specification in function form. When called with a pair of
--- treesitter captures, it returns a specification function outputting an
--- array of regions that match corresponding (`a` or `i`) capture.
---
--- In order for this to work, apart from working treesitter parser for desired
--- language, user should have a reachable language-specific 'textobjects'
--- query (see |get_query()|). 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
--- 'nvim-treesitter/nvim-treesitter-textobjects' plugin, 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 `function.outer`, `function.inner`, etc.
--- - Manually create file 'after/queries/<language name>/textobjects.scm' in
--- your |$XDG_CONFIG_HOME| directory. It should contain queries with
--- captures (later used to define textobjects). See |lua-treesitter-query|.
--- To verify that query file is reachable, run (example for "lua" language)
--- `:lua print(vim.inspect(vim.treesitter.get_query_files('lua', 'textobjects')))`
--- (output should have at least an intended file).
---
--- Example configuration for function definition textobject with
--- 'nvim-treesitter/nvim-treesitter-textobjects' captures:
--- >
--- local spec_treesitter = require('mini.ai').gen_spec.treesitter
--- require('mini.ai').setup({
--- custom_textobjects = {
--- F = spec_treesitter({ a = '@function.outer', i = '@function.inner' }),
--- o = spec_treesitter({
--- a = { '@conditional.outer', '@loop.outer' },
--- i = { '@conditional.inner', '@loop.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.
--- - On large files it is slower than pattern-based textobjects. Still very
--- fast though (one search should be magnitude of milliseconds or tens of
--- milliseconds on really large file).
---
---@param ai_captures table Captures for `a` and `i` textobjects: table with
--- <a> and <i> fields with captures for `a` and `i` textobjects respectively.
--- Each value can be either a string capture (should start with `'@'`) or an
--- array of such captures (best among all matches will be chosen).
---@param opts table|nil Options. Possible values:
--- - <use_nvim_treesitter> - whether to try to use 'nvim-treesitter' plugin
--- (if present) to do the query. It implements more advanced behavior at
--- cost of increased execution time. Provides more coherent experience if
--- 'nvim-treesitter-textobjects' queries are used. Default: `true`.
---
---@return function Function with |MiniAi.find_textobject()| signature which
--- returns array of current buffer regions representing matches for
--- corresponding (`a` or `i`) treesitter capture.
---
---@seealso |MiniAi-textobject-specification| for how this type of textobject
--- specification is processed.
--- |get_query()| for how query is fetched in case of no 'nvim-treesitter'.
--- |Query:iter_captures()| for how all query captures are iterated in case of
--- no 'nvim-treesitter'.
MiniAi.gen_spec.treesitter = function(ai_captures, opts)
opts = vim.tbl_deep_extend('force', { use_nvim_treesitter = true }, opts or {})
ai_captures = H.prepare_ai_captures(ai_captures)
return function(ai_type, _, _)
-- Get array of matched treesitter nodes
local target_captures = ai_captures[ai_type]
local has_nvim_treesitter, _ = pcall(require, 'nvim-treesitter')
local node_querier = (has_nvim_treesitter and opts.use_nvim_treesitter) and H.get_matched_nodes_plugin
or H.get_matched_nodes_builtin
local matched_nodes = node_querier(target_captures)
-- Return array of regions
return vim.tbl_map(function(node)
local line_from, col_from, line_to, col_to = node:range()
-- `node:range()` returns 0-based numbers for end-exclusive region
return { from = { line = line_from + 1, col = col_from + 1 }, to = { line = line_to + 1, col = col_to } }
end, matched_nodes)
end
end
--- Visually select textobject region
---
--- Does nothing if no region is found.
---
---@param ai_type string One of `'a'` or `'i'`.
---@param id string Single character string representing textobject id.
---@param opts table|nil Same as in |MiniAi.find_textobject()|. Extra fields:
--- - <vis_mode> - One of `'v'`, `'V'`, `'<C-v>'`. Default: Latest visual mode.
--- - <operator_pending> - Whether selection is for Operator-pending mode.
--- Used in that mode's mappings, shouldn't be used directly. Default: `false`.
MiniAi.select_textobject = function(ai_type, id, opts)
if H.is_disabled() then return end
opts = opts or {}
-- Exit to Normal before getting textobject id. This way invalid id doesn't
-- result into staying in current mode (which seems to be more convenient).
H.exit_to_normal_mode()
local tobj = MiniAi.find_textobject(ai_type, id, opts)
if tobj == nil then return end
local set_cursor = function(position) vim.api.nvim_win_set_cursor(0, { position.line, position.col - 1 }) end
-- Allow empty regions
local tobj_is_empty = tobj.to == nil
tobj.to = tobj.to or tobj.from
local prev_vis_mode = vim.fn.visualmode()
prev_vis_mode = prev_vis_mode == '' and 'v' or prev_vis_mode
local vis_mode = opts.vis_mode and vim.api.nvim_replace_termcodes(opts.vis_mode, true, true, true) or prev_vis_mode
-- Allow going past end of line in order to collapse multiline regions
local cache_virtualedit = vim.o.virtualedit
local cache_eventignore = vim.o.eventignore
pcall(function()
-- Do nothing in Operator-pending mode for empty region (except `c` or `d`)
if tobj_is_empty and opts.operator_pending and not (vim.v.operator == 'c' or vim.v.operator == 'd') then
H.message('Textobject region is empty. Nothing is done.')
return
end
-- Allow setting cursor past line end (allows collapsing multiline region)
vim.o.virtualedit = 'onemore'
-- Open enough folds to show left and right edges
set_cursor(tobj.from)
vim.cmd('normal! zv')
set_cursor(tobj.to)
vim.cmd('normal! zv')
-- Respect exclusive selection
if vim.o.selection == 'exclusive' then vim.cmd('normal! l') end
-- Start selection
vim.cmd('normal! ' .. vis_mode)
set_cursor(tobj.from)
if tobj_is_empty and opts.operator_pending then
-- Add single space (without triggering events) and visually select it.
-- Seems like the only way to make `ci)` and `di)` move inside empty