Repository navigation
Expand file tree
/
Copy pathalign.lua
More file actions
2073 lines (1842 loc) · 75.2 KB
/
Copy pathalign.lua
File metadata and controls
2073 lines (1842 loc) · 75.2 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
1
8000
82
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.align* Align text interactively
--- *MiniAlign*
---
--- MIT License Copyright (c) 2022 Evgeni Chasnovski
---
--- ==============================================================================
---
--- Rich and flexible customization of both alignment rules and user interaction.
--- Works with charwise, linewise, and blockwise selections in both Normal mode
--- (on textobject/motion; with dot-repeat) and Visual mode.
---
--- Features:
--- - Alignment is done in three main steps:
--- - <Split> lines into parts based on Lua pattern(s) or user-supplied rule.
--- - <Justify> parts for certain side(s) to be same width inside columns.
--- - <Merge> parts to be lines, with customizable delimiter(s).
--- Each main step can be preceded by other steps (pre-steps) to achieve
--- highly customizable outcome. See `steps` value in |MiniAlign.config|. For
--- more details, see |MiniAlign-glossary| and |MiniAlign-algorithm|.
---
--- - User can control alignment interactively by pressing customizable modifiers
--- (single keys representing how alignment steps and/or options should change).
--- Some of default modifiers:
--- - Press `s` to enter split Lua pattern.
--- - Press `j` to choose justification side from available ones ("left",
--- "center", "right", "none").
--- - Press `m` to enter merge delimiter.
--- - Press `f` to enter filter Lua expression to configure which parts
--- will be affected (like "align only first column").
--- - Press `i` to ignore some commonly unwanted split matches.
--- - Press `p` to pair neighboring parts so they be aligned together.
--- - Press `t` to trim whitespace from parts.
--- - Press `<BS>` (backspace) to delete some last pre-step.
--- For more details, see |MiniAlign-modifiers-builtin| and |MiniAlign-examples|.
---
--- - Alignment can be done with instant preview (result is updated after each
--- modifier) or without it (result is shown and accepted after non-default
--- split pattern is set).
---
--- - Every user interaction is accompanied with helper status message showing
--- relevant information about current alignment process.
---
--- # Setup ~
---
--- This module needs a setup with `require('mini.align').setup({})` (replace
--- `{}` with your `config` table). It will create global Lua table `MiniAlign`
--- which you can use for scripting or manually (with `:lua MiniAlign.*`).
---
--- See |MiniAlign.config| for available config settings.
---
--- You can override runtime config settings (like `config.modifiers`) locally
--- to buffer inside `vim.b.minialign_config` which should have same structure
--- as `MiniAlign.config`. See |mini.nvim-buffer-local-config| for more details.
---
--- To stop module from showing non-error feedback, set `config.silent = true`.
---
--- # Comparisons ~
---
--- - 'junegunn/vim-easy-align':
--- - 'mini.align' is mostly designed after 'junegunn/vim-easy-align', so
--- there are a lot of similarities.
--- - Both plugins allow users to change alignment options interactively by
--- pressing modifier keys (albeit completely different default ones).
--- 'junegunn/vim-easy-align' has those modifiers fixed, while 'mini.align'
--- allows their full customization. See |MiniAlign.config| for examples.
--- - 'junegunn/vim-easy-align' is designed to treat delimiters differently
--- than other parts of strings. 'mini.align' doesn't distinguish split
--- parts from one another by design: splitting is allowed to be done
--- based on some other logic than by splitting on delimiters.
--- - 'junegunn/vim-easy-align' initially aligns by only first delimiter.
--- 'mini.align' initially aligns by all delimiter.
--- - 'junegunn/vim-easy-align' implements special filtering by delimiter
--- row number. 'mini.align' has builtin filtering based on Lua code
--- supplied by user in modifier phase. See |MiniAlign.gen_step.filter|
--- and 'f' builtin modifier.
--- - 'mini.align' treats any non-registered modifier as a plain delimiter
--- pattern, while 'junegunn/vim-easy-align' does not.
--- - 'mini.align' exports core Lua function used for aligning strings
--- (|MiniAlign.align_strings()|).
--- - 'godlygeek/tabular':
--- - 'godlygeek/tabular' is mostly designed around single command which is
--- customized by printing its parameters. 'mini.align' implements
--- different concept of interactive alignment through pressing
--- customizable single character modifiers.
--- - 'godlygeek/tabular' can detect region upon which alignment can be
--- desirable. 'mini.align' does not by design: use Visual selection or
--- textobject/motion to explicitly define region to align.
---
--- # Disabling ~
---
--- To disable, set `vim.g.minialign_disable` (globally) or `vim.b.minialign_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.
--- Glossary
---
--- PARTS 2d array of strings (array of arrays of strings).
--- See more in |MiniAlign.as_parts()|.
---
--- ROW First-level array of parts (like `parts[1]`).
---
--- COLUMN Array of strings, constructed from parts elements with the same
--- second-level index (like `{ parts[1][1],` `parts[2][1], ... }`).
---
--- STEP A named callable. See |MiniAlign.new_step()|. When used in terms of
--- alignment steps, callable takes two arguments: some object (parts
--- or string array) and option table.
---
--- SPLIT Process of taking array of strings and converting it into parts.
---
--- JUSTIFY Process of taking parts and converting them to aligned parts (all
--- elements have same widths inside columns).
---
--- MERGE Process of taking parts and converting it back to array of strings.
--- Usually by concatenating rows into strings.
---
--- 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).
---
--- MODE Either charwise ("char", `v`, |charwise|), linewise ("line", `V`,
--- |linewise|) or blockwise ("block", `<C-v>`, |blockwise-visual|)
---@tag MiniAlign-glossary
--- Algorithm design
---
--- There are two main processes implemented in 'mini.align': strings alignment
--- and interactive region alignment. See |MiniAlign-glossary| for more information
--- about used terms.
---
--- Strings alignment ~
---
--- Main implementation is in |MiniAlign.align_strings()|. Its input is array of
--- strings and output - array of aligned strings. The process consists from three
--- main steps (split, justify, merge) which can be preceded by any number of
--- preliminary steps (pre-split, pre-justify, pre-merge).
---
--- Algorithm:
--- - <Pre-split>. Take input array of strings and consecutively apply all
--- pre-split steps (`steps.pre_split`). Each one has `(strings, opts)` signature
--- and should modify array in place.
--- - <Split>. Take array of strings and convert it to parts with `steps.split()`.
--- It has `(strings, opts)` signature and should return parts.
--- - <Pre-justify>. Take parts and consecutively apply all pre-justify
--- steps (`steps.pre_justify`). Each one has `(parts, opts)` signature and
--- should modify parts in place.
--- - <Justify>. Take parts and apply `steps.justify()`. It has `(parts, opts)`
--- signature and should modify parts in place.
--- - <Pre-merge>. Take parts and consecutively apply all pre-merge
--- steps (`steps.pre_merge`). Each one has `(parts, opts)` signature and
--- should modify parts in place.
--- - <Merge>. Take parts and convert it to array of strings with `steps.merge()`.
--- It has `(parts, opts)` signature and should return array of strings.
---
--- Notes:
--- - All table objects are initially copied so that modification in place doesn't
--- affect workflow.
--- - Default main steps are designed to be controlled via options. See
--- |MiniAlign.align_strings()| and default step entries in |MiniAlign.gen_step|.
--- - All steps are guaranteed to take same option table as second argument.
--- This allows steps to "talk" to each other, i.e. earlier steps can pass data
--- to later ones.
---
--- Interactive region alignment ~
---
--- Interactive alignment is a main entry point for most users. It can be done
--- in two flavors:
--- - <Without preview>. Initiated via mapping defined in `start` of
--- `MiniAlign.config.mappings`. Alignment is accepted once split pattern becomes
--- non-default.
--- - <With preview>. Initiated via mapping defined in `start_with_preview` of
--- `MiniAlign.config.mappings`. Alignment result is shown after every modifier
--- and is accepted after `<CR>` (`Enter`) is hit. Note: each preview is done by
--- applying current alignment steps and options to the initial region lines,
--- not the ones currently displaying in preview.
---
--- Lifecycle (assuming default mappings):
--- - <Initiate alignment>:
--- - In Normal mode type `ga` (or `gA` to show preview) followed by textobject
--- or motion defining region to be aligned.
--- - In Visual mode select region and type `ga` (or `gA` to show preview).
--- Strings contained in selected region will be used as input to
--- |MiniAlign.align_strings()|.
--- Beware of mode when selecting region: charwise (`v`), linewise (`V`), or
--- blockwise (`<C-v>`). They all behave differently.
--- - <Press modifiers>. Press single keys one at a time:
--- - If pressed key is among table keys of `modifiers` table of
--- |MiniAlign.config|, its function value is executed. It usually modifies
--- some options(s) and/or affects some pre-step(s).
--- - If pressed key is not among defined modifiers, it is treated as plain
--- split pattern.
--- This process can either end by itself (usually in case of no preview and
--- non-default split pattern being set) or you can choose to end it manually.
--- - <Accept or discard>. In case of active preview, accept current result by
--- pressing `<CR>`. Discard any result and return to initial regions with
--- either `<Esc>` or `<C-c>`.
---
--- See more in |MiniAlign-modifiers-builtin| and |MiniAlign-examples|.
---
--- Notes:
--- - Visual blockwise selection works best with 'virtualedit' equal to "block"
--- or "all".
--- - Alignment with preview works best with 'showmode' disabled.
---@tag MiniAlign-algorithm
--- Overview of builtin modifiers
---
--- All examples assume interactive alignment with preview in linewise mode. With
--- default mappings, use `V` to select lines and `gA` to initiate alignment. It
--- might be helpful to copy lines into modifiable buffer and experiment yourself.
---
--- Notes:
--- - Any pressed key which doesn't have defined modifier will be treated as
--- plain split pattern.
--- - All modifiers can be customized inside |MiniAlign.setup|. See "Modifiers"
--- section of |MiniAlign.config|.
---
--- Main option modifiers ~
---
--- <s> Enter split pattern (confirm prompt by pressing `<CR>`). Input is treated
--- as plain delimiter.
---
--- Before: >
--- a-b-c
--- aa-bb-cc
--- <
--- After typing `s-<CR>`: >
--- a -b -c
--- aa-bb-cc
--- <
--- <j> Choose justify side. Prompts user (with helper message) to type single
--- character identifier of side: `l`eft, `c`enter, `r`ight, `n`one.
---
--- Before: >
--- a_b_c
--- aa_bb_cc
--- <
--- After typing `_jr` (first make split by `_`): >
--- a_ b_ c
--- aa_bb_cc
--- <
--- <m> Enter merge delimiter (confirm prompt by pressing `<CR>`).
---
--- Before: >
--- a_b_c
--- aa_bb_cc
--- <
--- After typing `_m--<CR>` (first make split by `_`): >
--- a --_--b --_--c
--- aa--_--bb--_--cc
--- <
--- Modifiers adding pre-steps ~
---
--- <f> Enter filter expression. See more details in |MiniAlign.gen_step.filter()|.
---
--- Before: >
--- a_b_c
--- aa_bb_cc
--- <
--- After typing `_fn==1<CR>` (first make split by `_`): >
--- a _b_c
--- aa_bb_cc
--- <
--- <i> Ignore some split matches. It modifies `split_exclude_patterns` option by
--- adding commonly wanted patterns. See more details in
--- |MiniAlign.gen_step.ignore_split()|.
---
--- Before: >
--- /* This_is_assumed_to_be_comment */
--- a"_"_b
--- aa_bb
--- <
--- After typing `_i` (first make split by `_`): >
--- /* This_is_assumed_to_be_comment */
--- a"_"_b
--- aa _bb
--- <
--- <p> Pair neighboring parts.
---
--- Before: >
--- a_b_c
--- aaa_bbb_ccc
--- <
--- After typing `_p` (first make split by `_`): >
--- a_ b_ c
--- aaa_bbb_ccc
--- <
--- <t> Trim parts from whitespace on both sides (keeping indentation).
---
--- Before: >
--- a _ b _ c
--- aa _bb _cc
--- <
--- After typing `_t` (first make split by `_`): >
--- a _b _c
--- aa_bb_cc
--- <
--- Delete some last pre-step ~
---
--- <BS> Delete one of the pre-steps. If there is only one kind of pre-steps,
--- remove its latest added one. If not, prompt user to choose pre-step kind
--- by entering single character: `s`plit, `j`ustify, `m`erge.
---
--- Examples:
--- - `tp<BS>` results in only "trim" step to be left.
--- - `it<BS>` prompts to choose which step to delete (pre-split or
--- pre-justify in this case).
---
--- Special configurations for common splits ~
---
--- <=> Use special pattern to align by a group of consecutive "=". It can be
--- preceded by any number of punctuation marks and followed by some sommon
--- punctuation characters. Trim whitespace and merge with single space.
---
--- Before: >
--- a=b
--- aa<=bb
--- aaa===bbb
--- aaaa = cccc
--- <
--- After typing `=`: >
--- a = b
--- aa <= bb
--- aaa === bbb
--- aaaa = cccc
--- <
--- <,> Besides splitting by "," character, trim whitespace, pair neighboring
--- parts and merge with single space.
---
--- Before: >
--- a,b
--- aa,bb
--- aaa , bbb
--- <
--- After typing `,`: >
--- a, b
--- aa, bb
--- aaa, bbb
--- <
--- <|> Split by "|" character, trim whitespace, merge with single space.
---
--- Before: >
--- |a|b|
--- |aa|bb|
--- |aaa | bbb |
--- <
--- After typing `|`: >
--- | a | b |
--- | aa | bb |
--- | aaa | bbb |
--- <
--- < > (Space bar) Squash consecutive whitespace into single single space (accept
--- possible indentation) and split by `%s+` pattern (keeps indentation).
---
--- Before: >
--- a b c
--- aa bb cc
--- <
--- After typing `<Space>`: >
--- a b c
--- aa bb cc
---@tag MiniAlign-modifiers-builtin
--- More complex examples to explore functionality
---
--- Copy lines in modifiable buffer, initiate alignment with preview (`gAip`)
--- and try typing suggested key sequences.
--- These are modified examples taken from 'junegunn/vim-easy-align'.
---
--- Equal sign ~
---
--- Lines: >
---
--- # This=is=assumed=to be a comment
--- "a ="
--- a =
--- a = 1
--- bbbb = 2
--- ccccccc = 3
--- ccccccccccccccc
--- ddd = 4
--- eeee === eee = eee = eee=f
--- fff = ggg += gg &&= gg
--- g != hhhhhhhh == 888
--- i := 5
--- i %= 5
--- i *= 5
--- j =~ 5
--- j >= 5
--- aa => 123
--- aa <<= 123
--- aa >>= 123
--- bbb => 123
--- c => 1233123
--- d => 123
--- dddddd &&= 123
--- dddddd ||= 123
--- dddddd /= 123
--- gg <=> ee
--- <
--- Key sequences:
--- - `=`
--- - `=jc`
--- - `=jr`
--- - `=m!<CR>`
--- - `=p`
--- - `=i` (execute `:lua vim.o.commentstring = '# %s'` for full experience)
--- - `=<BS>`
--- - `=<BS>p`
--- - `=fn==1<CR>`
--- - `=<BS>fn==1<CR>t`
--- - `=frow>7<CR>`
---@tag MiniAlign-examples
---@alias __align_with_preview boolean|nil Whether to align with live preview.
-- Module definition ==========================================================
local MiniAlign = {}
local H = {}
--- Module setup
---
---@param config table|nil Module config table. See |MiniAlign.config|.
---
---@usage >lua
--- require('mini.align').setup() -- use default config
--- -- OR
--- require('mini.align').setup({}) -- replace {} with your config table
--- <
MiniAlign.setup = function(config)
-- Export module
_G.MiniAlign = MiniAlign
-- 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 ~
---
--- ## Modifiers ~
---
--- `MiniAlign.config.modifiers` is used to define interactive user experience
--- of managing alignment process. It is a table with single character keys and
--- modifier function values.
---
--- Each modifier function:
--- - Is called when corresponding modifier key is pressed.
--- - Has signature `(steps, opts)` and should modify any of its input in place.
---
--- Examples:
--- - Modifier function used for default 'i' modifier: >lua
---
--- function(steps, _)
--- table.insert(steps.pre_split, MiniAlign.gen_step.ignore_split())
--- end
--- <
--- - Tweak 't' modifier to use highest indentation instead of keeping it: >lua
---
--- require('mini.align').setup({
--- modifiers = {
--- t = function(steps, _)
--- local trim_high = MiniAlign.gen_step.trim('both', 'high')
--- table.insert(steps.pre_justify, trim_high)
--- end
--- }
--- })
--- <
--- - Tweak `j` modifier to cycle through available "justify_side" option
--- values (like in 'junegunn/vim-easy-align'): >lua
---
--- require('mini.align').setup({
--- modifiers = {
--- j = function(_, opts)
--- local next_option = ({
--- left = 'center', center = 'right', right = 'none', none = 'left',
--- })[opts.justify_side]
--- opts.justify_side = next_option or 'left'
--- end,
--- },
--- })
--- <
--- ## Options ~
---
--- `MiniAlign.config.options` defines default values of options used to control
--- behavior of steps.
---
--- Examples:
--- - Set `justify_side = 'center'` to center align at initialization.
---
--- For more details about options see |MiniAlign.align_strings()| and entries of
--- |MiniAlign.gen_step| for default main steps.
---
--- ## Steps ~
---
--- `MiniAlign.config.steps` defines default steps to be applied during
--- alignment process.
---
--- Examples:
--- - Align by default only first pair of columns: >lua
---
--- local align = require('mini.align')
--- align.setup({
--- steps = {
--- pre_justify = { align.gen_step.filter('n == 1') }
--- },
--- })
--- <
MiniAlign.config = {
-- Module mappings. Use `''` (empty string) to disable one.
mappings = {
start = 'ga',
start_with_preview = 'gA',
},
-- Modifiers changing alignment steps and/or options
modifiers = {
-- Main option modifiers
--minidoc_replace_start ['s'] = --<function: enter split pattern>,
['s'] = function(_, opts)
local input = H.user_input('Enter split Lua pattern')
if input == nil then return end
opts.split_pattern = input
end,
--minidoc_replace_end
--minidoc_replace_start ['j'] = --<function: choose justify side>,
['j'] = function(_, opts)
-- stylua: ignore
H.echo({
{ 'Select justify: ', 'ModeMsg' }, { 'l', 'Question' }, { 'eft, ' },
{ 'c', 'Question' }, { 'enter, ' }, { 'r', 'Question' }, { 'ight, ' },
{ 'n', 'Question' }, { 'one' }
})
local ok, char = pcall(vim.fn.getcharstr)
if not ok or char == '\27' then return end
local direction = ({ l = 'left', c = 'center', r = 'right', n = 'none' })[char]
if direction == nil then return end
opts.justify_side = direction
end,
--minidoc_replace_end
--minidoc_replace_start ['m'] = --<function: enter merge delimiter>,
['m'] = function(_, opts)
local input = H.user_input('Enter merge delimiter')
if input == nil then return end
opts.merge_delimiter = input
end,
--minidoc_replace_end
-- Modifiers adding pre-steps
--minidoc_replace_start ['f'] = --<function: filter parts by entering Lua expression>,
['f'] = function(steps, _)
local input = H.user_input('Enter filter expression')
local step = MiniAlign.gen_step.filter(input)
if step == nil then return end
table.insert(steps.pre_justify, step)
end,
--minidoc_replace_end
--minidoc_replace_start ['i'] = --<function: ignore some split matches>,
['i'] = function(steps, _) table.insert(steps.pre_split, MiniAlign.gen_step.ignore_split()) end,
--minidoc_replace_end
--minidoc_replace_start ['p'] = --<function: pair parts>,
['p'] = function(steps, _) table.insert(steps.pre_justify, MiniAlign.gen_step.pair()) end,
--minidoc_replace_end
--minidoc_replace_start ['t'] = --<function: trim parts>,
['t'] = function(steps, _) table.insert(steps.pre_justify, MiniAlign.gen_step.trim()) end,
--minidoc_replace_end
-- Delete some last pre-step
--minidoc_replace_start ['<BS>'] = --<function: delete some last pre-step>,
[vim.api.nvim_replace_termcodes('<BS>', true, true, true)] = function(steps, _)
local has_pre = {}
for _, pre in ipairs({ 'pre_split', 'pre_justify', 'pre_merge' }) do
if #steps[pre] > 0 then table.insert(has_pre, pre) end
end
if #has_pre == 0 then return end
if #has_pre == 1 then
local pre = steps[has_pre[1]]
table.remove(pre, #pre)
return
end
--stylua: ignore
H.echo({
{ 'Select pre-step to remove: ', 'ModeMsg' }, { 's', 'Question' }, { 'plit, ' },
{ 'j', 'Question' }, { 'ustify, ' }, { 'm', 'Question' }, { 'erge' },
})
local ok, char = pcall(vim.fn.getcharstr)
if not ok or char == '\27' then return end
if char == 's' then table.remove(steps.pre_split, #steps.pre_split) end
if char == 'j' then table.remove(steps.pre_justify, #steps.pre_justify) end
if char == 'm' then table.remove(steps.pre_merge, #steps.pre_merge) end
end,
--minidoc_replace_end
-- Special configurations for common splits
--minidoc_replace_start ['='] = --<function: enhanced setup for '='>,
['='] = function(steps, opts)
opts.split_pattern = '%p*=+[<>~]*'
table.insert(steps.pre_justify, MiniAlign.gen_step.trim())
opts.merge_delimiter = ' '
end,
--minidoc_replace_end
--minidoc_replace_start [','] = --<function: enhanced setup for ','>,
[','] = function(steps, opts)
opts.split_pattern = ','
table.insert(steps.pre_justify, MiniAlign.gen_step.trim())
table.insert(steps.pre_justify, MiniAlign.gen_step.pair())
opts.merge_delimiter = ' '
end,
--minidoc_replace_end
--minidoc_replace_start ['|'] = --<function: enhanced setup for '|'>,
['|'] = function(steps, opts)
opts.split_pattern = '|'
table.insert(steps.pre_justify, MiniAlign.gen_step.trim())
opts.merge_delimiter = ' '
end,
--minidoc_replace_end
--minidoc_replace_start [' '] = --<function: enhanced setup for ' '>,
[' '] = function(steps, opts)
table.insert(
steps.pre_split,
MiniAlign.new_step('squash', function(strings)
-- Replace all space sequences with single space (except indent)
for i, s in ipairs(strings) do
strings[i] = s:gsub('()(%s+)', function(n, space) return n == 1 and space or ' ' end)
end
end)
)
-- Don't use `' '` to respect indent
opts.split_pattern = '%s+'
end,
--minidoc_replace_end
},
-- Default options controlling alignment process
options = {
split_pattern = '',
justify_side = 'left',
merge_delimiter = '',
},
-- Default steps performing alignment (if `nil`, default is used)
steps = {
pre_split = {},
split = nil,
pre_justify = {},
justify = nil,
pre_merge = {},
merge = nil,
},
-- Whether to disable showing non-error feedback
-- This also affects (purely informational) helper messages shown after
-- idle time if user input is required.
silent = false,
}
--minidoc_afterlines_end
-- Module functionality =======================================================
--- Align strings
---
--- For details about alignment process see |MiniAlign-algorithm|.
---
---@param strings table Array of strings.
---@param opts table|nil Options. Its copy will be passed to steps as second
--- argument. Extended with `MiniAlign.config.options`.
--- This is a place to control default main steps:
--- - `opts.split_pattern` - Lua pattern(s) used to make split parts.
--- - `opts.split_exclude_patterns` - which split matches should be ignored.
--- - `opts.justify_side` - which direction(s) alignment should be done.
--- - `opts.justify_offsets` - offsets tweaking width of first column
--- - `opts.merge_delimiter` - which delimiter(s) to use when merging.
--- For more information see |MiniAlign.gen_step| entry for corresponding
--- default step.
---@param steps table|nil Steps. Extended with `MiniAlign.config.steps`.
--- Possible `nil` values are replaced with corresponding default steps:
--- - `split` - |MiniAlign.gen_step.default_split()|.
--- - `justify` - |MiniAlign.gen_step.default_justify()|.
--- - `merge` - |MiniAlign.gen_step.default_merge()|.
MiniAlign.align_strings = function(strings, opts, steps)
-- Validate arguments
if not H.is_array_of(strings, H.is_string) then
H.error('First argument of `MiniAlign.align_strings()` should be array of strings.')
end
opts = H.normalize_opts(opts)
steps = H.normalize_steps(steps, 'steps')
-- Make a copy so that modification in place doesn't affect input
strings = vim.deepcopy(strings)
-- Pre split
for _, step in ipairs(steps.pre_split) do
H.apply_step(step, strings, opts, 'pre_split')
end
-- Split
local parts = H.apply_step(steps.split, strings, opts, 'split')
if not H.is_parts(parts) then
if H.can_be_parts(parts) then
parts = MiniAlign.as_parts(parts)
else
H.error('Output of `split` step should be convertible to parts. See `:h MiniAlign.as_parts()`.')
end
end
-- Pre justify
for _, step in ipairs(steps.pre_justify) do
H.apply_step(step, parts, opts, 'pre_justify')
end
-- Justify
H.apply_step(steps.justify, parts, opts, 'justify')
-- Pre merge
for _, step in ipairs(steps.pre_merge) do
H.apply_step(step, parts, opts, 'pre_merge')
end
-- Merge
local new_strings = H.apply_step(steps.merge, parts, opts, 'merge')
if not H.is_array_of(new_strings, H.is_string) then H.error('Output of `merge` step should be array of strings.') end
return new_strings
end
--- Align current region with user-supplied steps
---
--- Mostly designed to be used inside mappings.
---
--- Will use |MiniAlign.align_strings()| and set the following options in `opts`:
--- - `justify_offsets` - array of offsets used to achieve actual alignment of
--- a region. It is non-trivial (not array of zeros) only for charwise
--- selection: offset of first string is computed as width of prefix to the
--- left of region start.
--- - `region` - current affected region (see |MiniAlign-glossary|). Can be
--- used to create more advanced steps.
--- - `mode` - mode of selection (see |MiniAlign-glossary|).
---
---@param mode string Selection mode. One of "char", "line", "block".
MiniAlign.align_user = function(mode)
local modifiers = H.get_config().modifiers
local with_preview = H.cache.with_preview
local opts = H.cache.opts or H.normalize_opts()
local steps = H.cache.steps or H.normalize_steps()
local steps_are_from_cache = H.cache.steps ~= nil
H.cache.region = nil
-- Track if lines were actually changed to properly undo during preview
local lines_were_changed = false
-- Make initial process
lines_were_changed = H.process_current_region(lines_were_changed, mode, opts, steps)
-- Make early return:
-- - If cache is present (enables dot-repeat).
-- - If `split` is not default with no preview (no more information needed).
if steps_are_from_cache or (not with_preview and opts.split_pattern ~= '') then return end
-- Ask user to input modifier id until no more is needed
local n_iter = 0
while true do
-- Get modifier from user
local id = H.user_modifier(with_preview, H.make_status_msg_chunks(opts, steps))
n_iter = n_iter + 1
-- Stop in case user supplied inappropriate modifier id (abort)
-- Also stop in case of too many iterations (guard from infinite cycle)
if id == nil or n_iter > 1000 then
if lines_were_changed then H.undo() end
if n_iter > 1000 then H.echo({ { 'Too many modifiers typed.', 'WarningMsg' } }, true) end
break
end
-- Stop preview after `<CR>` (confirmation)
if with_preview and id == '\r' then break end
-- Apply modifier
local mod = modifiers[id]
if mod == nil then
-- Use supplied identifier as split pattern
opts.split_pattern = vim.pesc(id)
else
-- Modifier should change input `steps` table in place
local ok, out = pcall(mod, steps, opts)
if not ok then
-- Force message to appear for 500ms because it might be overridden by
-- helper status message
local msg = string.format('Modifier %s should be properly callable. Reason: %s', vim.inspect(id), out)
H.echo({ { msg, 'WarningMsg' } }, true)
vim.cmd('redraw')
vim.loop.sleep(500)
end
end
-- Normalize steps and options while validating their correctness
opts = H.normalize_opts(opts)
steps = H.normalize_steps(steps, opts)
-- Process region while tracking if lines were set at least once
local lines_now_changed = H.process_current_region(lines_were_changed, mode, opts, steps)
lines_were_changed = lines_were_changed or lines_now_changed
-- Stop in "no preview" mode right after `split` is defined
if not with_preview and opts.split_pattern ~= '' then break end
end
-- Remove helper status message (if shown)
H.unecho()
end
--- Convert 2d array of strings to parts
---
--- This function verifies if input is a proper 2d array of strings and adds
--- methods to its copy.
---
---@class parts
---
---@field apply function Takes callable `f` and applies it to every part.
--- Callable should have signature `(s, data)`: `s` is a string part,
--- `data` - table with its data (<row> has row number, <col> has column number).
--- Returns new 2d array.
---
---@field apply_inplace function Takes callable `f` and applies it to every part.
--- Should have same signature as in `apply` method. Outputs (should all be
--- strings) are assigned in place to a corresponding parts element. Returns
--- parts itself to enable method chaining.
---
---@field get_dims function Return dimensions of parts array: a table with
--- <row> and <col> keys having number of rows and number of columns (maximum
--- number of elements across all rows).
---
---@field group function Concatenate neighboring strings based on supplied
--- boolean mask and direction (one of "left", default, or "right"). Has
--- signature `(mask, direction)` and modifies parts in place. Returns parts
--- itself to enable method chaining.
--- Example:
--- - Parts: { { "a", "b", "c" }, { "d", "e" }, { "f" } }
--- - Mask: { { false, false, true }, { true, false }, { false } }
--- - Result for direction "left": { { "abc" }, { "d", "e" }, { "f" } }
--- - Result for direction "right": { { "ab","c" }, { "de" }, { "f" } }
---
---@field pair function Concatenate neighboring element pairs. Takes
--- `direction` as input (one of "left", default, or "right") and applies
--- `group()` for an alternating mask.
--- Example:
--- - Parts: { { "a", "b", "c" }, { "d", "e" }, { "f" } }
--- - Result for direction "left": { { "ab", "c" }, { "de" }, { "f" } }
--- - Result for direction "right": { { "a", "bc" }, { "de" }, { "f" } }
---
---@field slice_col function Return column with input index `j`. Note: it might
--- not be an array if rows have unequal number of columns.
---
---@field slice_row function Return row with input index `i`.
---
---@field trim function Trim elements whitespace. Has signature `(direction, indent)`
--- and modifies parts in place. Returns parts itself to enable method chaining.
--- - Possible values of `direction`: "both" (default), "left", "right",
--- "none". Defines from which side whitespaces should be removed.
--- - Possible values of `indent`: "keep" (default), "low", "high", "remove".
--- Defines what to do with possible indent (left whitespace of first string
--- in a row). Value "keep" keeps it; "low" makes all indent equal to the
--- lowest across rows; "high" - highest across rows; "remove" - removes indent.
---
---@usage >lua
--- parts = MiniAlign.as_parts({ { 'a', 'b' }, { 'c' } })
--- print(vim.inspect(parts.get_dims())) -- Should be { row = 2, col = 2 }
---
--- parts.apply_inplace(function(s, data)
--- return ' ' .. data.row .. s .. data.col .. ' '
--- end)
--- print(vim.inspect(parts)) -- Should be { { ' 1a1 ', ' 1b2 ' }, { ' 2c1 ' } }
---
--- parts.trim('both', 'remove').pair()
--- print(vim.inspect(parts)) -- Should be { { '1a11b2' }, { '2c1' } }
--- <
MiniAlign.as_parts = function(arr2d)
local ok, msg = H.can_be_parts(arr2d)
if not ok then H.error('Input of `as_parts()` ' .. msg) end
local parts = vim.deepcopy(arr2d)
local methods = {}
methods.apply = function(f)
local res = {}
for i, row in ipairs(parts) do
res[i] = {}
for j, s in ipairs(row) do
res[i][j] = f(s, { row = i, col = j })
end
end
return res
end
methods.apply_inplace = function(f)
for i, row in ipairs(parts) do
for j, s in ipairs(row) do
local new_val = f(s, { row = i, col = j })
if type(new_val) ~= 'string' then H.error('Input of `apply_inplace()` method should always return string.') end
parts[i][j] = new_val
end
end
return parts
end
methods.get_dims = function()
local n_cols = 0
for _, row in ipairs(parts) do
n_cols = math.max(n_cols, #row)
end
return { row = #parts, col = n_cols }
end
-- Group cells into single string based on boolean mask.
-- Can be used for filtering separators and sticking separator to its part.
methods.group = function(mask, direction)
direction = direction or 'left'
for i, row in ipairs(parts) do
local group_tables = H.group_by_mask(row, mask[i], direction)
parts[i] = vim.tbl_map(table.concat, group_tables)
end
return parts
end
methods.pair = function(direction)
direction = direction or 'left'
local mask = {}
for i, row in ipairs(parts) do
mask[i] = {}
for j, _ in ipairs(row) do
-- Count from corresponding end
local num = direction == 'left' and j or (#row - j + 1)
mask[i][j] = num % 2 == 0
end
end
parts.group(mask, direction)
return parts
end
-- NOTE: output might not be an array (some rows can not have input column)
-- Use `vim.tbl_keys()` and `vim.tbl_values()`
methods.slice_col = function(j)
return vim.tbl_map(function(row) return row[j] end, parts)
end
methods.slice_row = function(i) return parts[i] or {} end
methods.trim = function(direction, indent)
direction = direction or 'both'
indent = indent or 'keep'
-- Verify arguments
local trim_fun = H.trim_functions[direction]
if not vim.is_callable(trim_fun) then
local allowed = vim.tbl_map(vim.inspect, vim.tbl_keys(H.trim_functions))
table.sort(allowed)
H.error('`direction` should be one of ' .. table.concat(allowed, ', ') .. '.')
end
local indent_fun = H.indent_functions[indent]
if not vim.is_callable(indent_fun) then
local allowed = vim.tbl_map(vim.inspect, vim.tbl_keys(H.indent_functions))
table.sort(allowed)
H.error('`indent` should be one of ' .. table.concat(allowed, ', ') .. '.')
end
-- Compute indentation to restore later
local row_indent = vim.tbl_map(function(row) return row[1]:match('^(%s*)') end, parts)
row_indent = indent_fun(row_indent)
-- Trim
parts.apply_inplace(trim_fun)
-- Restore indentation if it was removed
if vim.tbl_contains({ 'both', 'left' }, direction) then
for i, row in ipairs(parts) do
row[1] = string.format('%s%s', row_indent[i], row[1])
end
end
return parts
end
return setmetatable(parts, { class = 'parts', __index = methods })
end