Repository navigation
Expand file tree
/
Copy pathsnippets.lua
More file actions
2821 lines (2561 loc) · 125 KB
/
Copy pathsnippets.lua
File metadata and controls
2821 lines (2561 loc) · 125 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.snippets* Manage and expand snippets
---
--- MIT License Copyright (c) 2024 Evgeni Chasnovski
--- Snippet is a template for a frequently used text. Typical workflow is to type
--- snippet's (configurable) prefix and expand it into a snippet session.
---
--- The template usually contains both pre-defined text and places (called
--- "tabstops") for user to interactively change/add text during snippet session.
---
--- This module supports (only) snippet syntax defined in LSP specification (with
--- small deviations). See |MiniSnippets-syntax-specification|.
---
--- Features:
--- - Manage snippet collection by adding it explicitly or with a flexible set of
--- performant built-in loaders. See |MiniSnippets.gen_loader|.
---
--- - Configured snippets are efficiently resolved before every expand based on
--- current local context. This, for example, allows using different snippets
--- in different local tree-sitter languages (like in markdown code blocks).
--- See |MiniSnippets.default_prepare()|.
---
--- - Match which snippet to insert based on the currently typed text.
--- Supports both exact and fuzzy matching. See |MiniSnippets.default_match()|.
---
--- - Select from several matched snippets via `vim.ui.select()`.
--- See |MiniSnippets.default_select()|.
---
--- - Start specialized in-process LSP server to show loaded snippets inside
--- (auto)completion engines (like |mini.completion|).
--- See |MiniSnippets.start_lsp_server()|.
---
--- - Insert, jump, and edit during snippet session in a configurable manner:
--- - Configurable mappings for jumping and stopping.
--- - Jumping wraps around the tabstops for easier navigation.
--- - Easy to reason rules for when session automatically stops.
--- - Text synchronization of linked tabstops preserving relative indent.
--- - Dynamic tabstop state visualization (current/visited/unvisited, etc.)
--- - Inline visualization of empty tabstops (requires Neovim>=0.10).
--- - Works inside comments by preserving comment leader on new lines.
--- - Supports nested sessions (expand snippet while there is an active one).
--- See |MiniSnippets.default_insert()|.
---
--- - Exported function to parse snippet body into easy-to-reason data structure.
--- See |MiniSnippets.parse()|.
---
--- Notes:
--- - It does not set up any snippet collection by default. Explicitly populate
--- `config.snippets` to have snippets to match from.
--- - It does not come with a built-in snippet collection. It is expected from
--- users to add their own snippets, manually or with dedicated plugin(s).
--- - It does not support variable/tabstop transformations in default snippet
--- session. This requires ECMAScript Regular Expression parser which can not
--- be implemented concisely.
---
--- Sources with more details:
--- - |MiniSnippets-glossary|
--- - |MiniSnippets-overview|
--- - |MiniSnippets-examples|
--- - |MiniSnippets-in-other-plugins| (for plugin authors)
---
--- # Dependencies ~
---
--- This module doesn't come with snippet collection. Either create it manually
--- or install a dedicated plugin. For example,
--- [rafamadriz/friendly-snippets](https://github.com/rafamadriz/friendly-snippets).
---
--- # Setup ~
---
--- This module needs a setup with `require('mini.snippets').setup({})` (replace `{}`
--- with your `config` table). It will create global Lua table `MiniSnippets` which
--- you can use for scripting or manually (with `:lua MiniSnippets.*`).
---
--- See |MiniSnippets.config| for `config` structure and default values.
---
--- You can override runtime config settings locally to buffer inside
--- `vim.b.minisnippets_config` which should have same structure as
--- `Minisnippets.config`. See |mini.nvim-buffer-local-config| for more details.
---
--- # Comparisons ~
---
--- - [L3MON4D3/LuaSnip](https://github.com/L3MON4D3/LuaSnip):
--- - Both contain functionality to load snippets from file system.
--- This module provides several common loader generators while 'LuaSnip'
--- contains a more elaborate loading setup.
--- Also both require explicit opt-in for which snippets to load.
--- - Both support LSP snippet format. 'LuaSnip' also provides own more
--- elaborate snippet format which is out of scope for this module.
--- - 'LuaSnip' can autoexpand snippets, while this module always requires
--- an explicit user action to expand (by design).
--- - Both contain snippet expand functionality which differs in some aspects:
--- - 'LuaSnip' has an elaborate dynamic tabstop visualization config.
--- This module provides a handful of dedicated highlight groups.
--- - This module provides configurable visualization of empty tabstops.
--- - 'LusSnip' implements nested sessions by essentially merging them
--- into one. This module treats each nested session separately (to not
--- visually overload) while storing them in stack (first in last out).
--- - 'LuaSnip' uses |Select-mode| to power replacing current tabstop,
--- while this module always stays in |Insert-mode|. This enables easier
--- mapping understanding and more targeted highlighting.
--- - This module implements jumping which wraps after final tabstop
--- for more flexible navigation (enhanced with by a more flexible
--- autostopping rules), while 'LuaSnip' autostops session once
--- jumping reached the final tabstop.
---
--- - Built-in |vim.snippet| (on Neovim>=0.10):
--- - Does not contain functionality to load or match snippets (by design),
--- while this module does.
--- - Both contain expand functionality based on LSP snippet format.
--- Differences in how snippet sessions are handled are similar to
--- comparison with 'LuaSnip'.
---
--- - [rafamadriz/friendly-snippets](https://github.com/rafamadriz/friendly-snippets):
--- - A snippet collection plugin without features to manage or expand them.
--- This module is designed with 'friendly-snippets' compatibility in mind.
---
--- - [abeldekat/cmp-mini-snippets](https://github.com/abeldekat/cmp-mini-snippets):
--- - A source for [hrsh7th/nvim-cmp](https://github.com/hrsh7th/nvim-cmp)
--- that integrates 'mini.snippets'.
---
--- # Highlight groups ~
---
--- - `MiniSnippetsCurrent` - current tabstop.
--- - `MiniSnippetsCurrentReplace` - current tabstop, placeholder is to be replaced.
--- - `MiniSnippetsFinal` - special `$0` tabstop.
--- - `MiniSnippetsUnvisited` - not yet visited tabstop(s).
--- - `MiniSnippetsVisited` - visited tabstop(s).
---
--- To change any highlight group, set it directly with |nvim_set_hl()|.
---
--- # Disabling ~
---
--- To disable core functionality, set `vim.g.minisnippets_disable` (globally) or
--- `vim.b.minisnippets_disable` (for a buffer) to `true`. Considering high number
--- of different scenarios and customization intentions, writing exact rules
--- for disabling module's functionality is left to user. See
--- |mini.nvim-disabling-recipes| for common recipes.
---@tag MiniSnippets
--- POSITION ~
--- Table representing position in a buffer. Fields:
--- - <line> `(number)` - line number (starts at 1).
--- - <col> `(number)` - column number (starts at 1).
---
--- REGION ~
--- Table representing region in a buffer.
--- Fields: <from> and <to> for inclusive start/end POSITIONs.
---
--- SNIPPET ~
--- Data about template to insert. Should contain fields:
--- - <prefix> - string snippet identifier.
--- - <body> - string snippet content with appropriate syntax.
--- - <desc> - string snippet description in human readable form.
---
--- Can also be used to mean snippet body if distinction is clear.
---
--- SNIPPET SESSION ~
--- Interactive state for user to adjust inserted snippet.
---
--- MATCHED SNIPPET ~
--- Snippet which contains <region> field with region that matched it.
--- Usually region needs to be removed.
---
--- SNIPPET NODE ~
--- Unit of parsed snippet body. See |MiniSnippets.parse()|.
---
--- TABSTOP ~
--- Dedicated places in snippet body for users to interactively adjust.
--- Specified in snippet body with `$` followed by digit(s).
---
--- LINKED TABSTOPS ~
--- Different nodes assigned the same tabstop. Updated in sync.
---
--- REFERENCE NODE ~
--- First (from left to right) node of linked tabstops. Used to determine
--- synced text and cursor placement after jump.
---
--- EXPAND ~
--- Action to start snippet session based on currently typed text.
--- Always done in current buffer at cursor. Executed steps:
--- - `PREPARE` - resolve raw config snippets at context.
--- - `MATCH` - match resolved snippets at cursor position.
--- - `SELECT` - possibly choose among matched snippets.
--- - `INSERT` - insert selected snippet and start snippet session.
---@tag MiniSnippets-glossary
--- Snippet is a template for a frequently used text. Typical workflow is to type
--- snippet's (configurable) prefix and expand it into a snippet session: add some
--- pre-defined text and allow user to interactively change/add at certain places.
---
--- This overview assumes default config for mappings and expand.
--- See |MiniSnippets.config| and |MiniSnippets-examples| for more details.
---
--- # Snippet structure ~
---
--- Snippet consists from three parts:
--- - `Prefix` - identifier used to match against current text.
--- - `Body` - actually inserted content with appropriate syntax.
--- - `Desc` - description in human readable form.
---
--- Example: `{ prefix = 'tis', body = 'This is snippet', desc = 'Snip' }`
--- Typing `tis` and pressing "expand" mapping (<C-j> by default) will remove "tis",
--- add "This is snippet", and place cursor at the end in Insert mode.
---
--- # Syntax ~
--- *MiniSnippets-syntax-specification*
---
--- Inserting just text after typing smaller prefix is already powerful enough.
--- For more flexibility, snippet body can be formatted in a special way to
--- provide extra features. This module implements support for syntax defined
--- in LSP specification (with small deviations). See this link for reference:
--- https://microsoft.github.io/language-server-protocol/specifications/lsp/3.18/specification/#snippet_syntax
---
--- A quick overview of basic syntax features:
---
--- - Tabstops are snippet parts meant for interactive editing at their location.
--- They are denoted as `$1`, `$2`, etc.
--- Navigating between them is called "jumping" and is done in numerical order
--- of tabstop identifiers by pressing special keys: <C-l> and <C-h> to jump
--- to next and previous tabstop respectively.
--- Special tabstop `$0` is called "final tabstop": it is used to decide when
--- snippet session is automatically stopped and is visited last during jumping.
---
--- Example: `T1=$1 T2=$2 T0=$0` is expanded as `T1= T2= T0=` with three tabstops.
---
--- - Tabstop can have placeholder: a text used if tabstop is not yet edited.
--- Text is preserved if no editing is done. It follows this same syntax, which
--- means it can itself contain tabstops with placeholders (i.e. be nested).
--- Tabstop with placeholder is denoted as `${1:placeholder}` (`$1` is `${1:}`).
---
--- Example: `T1=${1:text} T2=${2:<$1>}` is expanded as `T1=text T2=<text>`;
--- typing `x` at first placeholder results in `T1=x T2=<x>`;
--- jumping once and typing `y` results in `T1=x T2=y`.
---
--- - There can be several tabstops with same identifier. They are linked and
--- updated in sync during text editing. Can also have different placeholders;
--- they are forced to be the same as in the first (from left to right) tabstop.
---
--- Example: `T1=${1:text} T1=$1` is expanded as `T1=text T1=text`;
--- typing `x` at first placeholder results in `T1=x T1=x`.
---
--- - Tabstop can also have choices: suggestions about tabstop text. It is denoted
--- as `${1|a,b,c|}`. First choice is used as placeholder.
---
--- Example: `T1=${1|left,right|}` is expanded as `T1=left`.
---
--- - Variables can be used to automatically insert text without user interaction.
--- As tabstops, each one can have a placeholder which is used if variable is
--- not defined. There is a special set of variables describing editor state.
---
--- Example: `V1=$TM_FILENAME V2=${NOTDEFINED:placeholder}` is expanded as
--- `V1=current-file-basename V2=placeholder`.
---
--- What's different from LSP specification:
--- - Special set of variables is wider and is taken from VSCode specification:
--- https://code.visualstudio.com/docs/editor/userdefinedsnippets#_variables
--- Exceptions are `BLOCK_COMMENT_START` and `BLOCK_COMMENT_END` as Neovim doesn't
--- provide this information.
--- - Variable `TM_SELECTED_TEXT` is resolved as contents of |quote_quote| register.
--- It assumes that text is put there prior to expanding. For example, visually
--- select, press |c|, type prefix, and expand.
--- See |MiniSnippets-examples| for how to adjust this.
--- - Environment variables are recognized and supported: `V1=$VIMRUNTIME` will
--- use an actual value of |$VIMRUNTIME|.
--- - Variable transformations are not supported during snippet session. It would
--- require interacting with ECMAScript-like regular expressions for which there
--- is no easy way in Neovim. It may change in the future.
--- Transformations are recognized during parsing, though, with some exceptions:
--- - The `}` inside `if` of `${1:?if:else}` needs escaping (for technical reasons).
---
--- There is a |MiniSnippets.parse()| function for programmatically parsing
--- snippet body into a comprehensible data structure.
---
--- # Expand ~
---
--- Using snippets is done via what is called "expanding". It goes like this:
--- - Type snippet prefix or its recognizable part.
--- - Press <C-j> to expand. It will perform the following steps:
--- - Prepare available snippets in current context (buffer + local language).
--- This allows snippet setup to have general function loaders which return
--- different snippets in different contexts.
--- - Match text to the left of cursor with available prefixes. It first tries
--- to do exact match and falls back to fuzzy matching.
--- - If there are several matches, use `vim.ui.select()` to choose one.
--- - Insert single matching snippet. If snippet contains tabstops, start
--- snippet session.
---
--- For more details about each step see:
--- - |MiniSnippets.default_prepare()|
--- - |MiniSnippets.default_match()|
--- - |MiniSnippets.default_select()|
--- - |MiniSnippets.default_insert()|
---
--- Snippet session allows interactive editing at tabstop locations:
---
--- - All tabstop locations are visualized depending on tabstop "state" (whether
--- it is current/visited/unvisited/final and whether it was already edited).
--- Empty tabstops are visualized with inline virtual text ("•"/"∎" for
--- regular/final tabstops). It is removed after session is stopped.
---
--- - Start session at first tabstop. Type text to replace placeholder.
--- When finished with current tabstop, jump to next with <C-l>. Repeat.
--- If changed mind about some previous tabstop, jump back with <C-h>.
--- Jumping also wraps around the edge (first tabstop is next after final).
---
--- - If tabstop has choices, use <C-n> / <C-p> to select next / previous item.
---
--- - Starting another snippet session while there is an active one is allowed.
--- This creates nested sessions: suspend current, start the new one.
--- After newly created is stopped, resume the suspended one.
---
--- - Stop session manually by pressing <C-c> or make it stop automatically:
--- if final tabstop is current either make a text edit or exit to Normal mode.
--- If snippet doesn't explicitly define final tabstop, it is added at the end
--- of the snippet.
---
--- For more details about snippet session see |MiniSnippets-session|.
---
--- To select and insert snippets via completion engine (that supports LSP
--- completion; like |mini.completion| or |lsp-autocompletion|),
--- call |MiniSnippets.start_lsp_server()| after |MiniSnippets.setup()|. This sets up
--- an LSP server that matches and provides snippets loaded with 'mini.snippets'.
--- To match with completion engine, use `start_lsp_server({ match = false })`.
---
--- # Management ~
---
--- Out of the box 'mini.snippets' doesn't load any snippets, it should be done
--- explicitly inside |MiniSnippets.setup()| following |MiniSnippets.config|.
---
--- The suggested approach to snippet management is to create dedicated files with
--- snippet data and load them through function loaders in `config.snippets`.
--- See |MiniSnippets-examples| for basic (yet capable) snippet management config.
---
--- ## File s
10BC8
pecification ~
--- *MiniSnippets-file-specification*
---
--- General idea of supported files is to have at least out of the box experience
--- with common snippet collections. Namely "rafamadriz/friendly-snippets".
--- The following files are supported:
---
--- - Extensions:
--- - Read/decoded as JSON object (|vim.json.decode()|): `*.json`, `*.code-snippets`
--- - Executed as Lua file (|dofile()|) and uses returned value: `*.lua`
---
--- - Content:
--- - Dict-like: object in JSON; returned table in Lua; no order guarantees.
--- - Array-like: array in JSON; returned array table in Lua; preserves order.
---
--- Example of file content with a single snippet:
--- - Lua dict-like: `return { name = { prefix = 't', body = 'Text' } }`
--- - Lua array-like: `return { { prefix = 't', body = 'Text', desc = 'name' } }`
--- - JSON dict-like: `{ "name": { "prefix": "t", "body": "Text" } }`
--- - JSON array-like: `[ { "prefix": "t", "body": "Text", "desc": "name" } ]`
---
--- Notes:
--- - There is no built-in support for VSCode-like "package.json" files. Define
--- structure manually in |MiniSnippets.setup()| via built-in or custom loaders.
--- - There is no built-in support for `scope` field of snippet data. Snippets are
--- expected to be manually separated into smaller files and loaded on demand.
---
--- For supported snippet syntax see |MiniSnippets-syntax-specification|.
---
--- ## General advice ~
---
--- - Put files in "snippets" subdirectory of any path in 'runtimepath' (like
--- '`$XDG_CONFIG_HOME`/nvim/snippets/global.json').
--- This is compatible with |MiniSnippets.gen_loader.from_runtime()| and
--- example from |MiniSnippets-examples|.
--- - Prefer `*.json` files with dict-like content if you want more cross platfrom
--- setup. Otherwise use `*.lua` files with array-like content.
--- - To implement "dynamic snippet" that changes data (usually <body>) depending
--- on the context, use `*.lua` file with function returning snippet data.
--- It should be an element in the output table (dict or array like).
---
--- # Demo ~
---
--- The best way to grasp the design of snippet management and expansion is to
--- try them out yourself. Here are steps for a basic demo:
--- - Create 'snippets/global.json' file in the config directory with the content: >json
---
--- {
--- "Basic": { "prefix": "ba", "body": "T1=$1 T2=$2 T0=$0" },
--- "Placeholders": { "prefix": "pl", "body": "T1=${1:aa}\nT2=${2:<$1>}" },
--- "Choices": { "prefix": "ch", "body": "T1=${1|a,b|} T2=${2|c,d|}" },
--- "Linked": { "prefix": "li", "body": "T1=$1\n\tT1=$1" },
--- "Variables": { "prefix": "va", "body": "Runtime: $VIMRUNTIME\n" },
--- "Complex": {
--- "prefix": "co",
--- "body": [ "T1=${1:$RANDOM}", "T3=${3:$1_${2:$1}}", "T2=$2" ]
--- }
--- }
--- <
--- - Set up 'mini.snippets' as recommended in |MiniSnippets-examples|.
--- - Open Neovim. Type each snippet prefix and press <C-j> (even if there is
--- still active session). Explore from there.
---@tag MiniSnippets-overview
--- # Basic snippet management config ~
---
--- Example of snippet management setup that should cover most cases: >lua
---
--- -- Setup
--- local gen_loader = require('mini.snippets').gen_loader
--- require('mini.snippets').setup({
--- snippets = {
--- -- Load custom file with global snippets first
--- gen_loader.from_file('~/.config/nvim/snippets/global.json'),
---
--- -- Load snippets based on current language by reading files from
--- -- "snippets/" subdirectories from 'runtimepath' directories.
--- gen_loader.from_lang(),
--- },
--- })
--- <
--- This setup allows having single file with custom "global" snippets (will be
--- present in every buffer) and snippets which will be loaded based on the local
--- language (see |MiniSnippets.gen_loader.from_lang()|).
---
--- Create language snippets manually (by creating and populating
--- '`$XDG_CONFIG_HOME`/nvim/snippets/lua.json' file) or by installing dedicated
--- snippet collection plugin (like 'rafamadriz/friendly-snippets').
---
--- Note: all built-in loaders and |MiniSnippets.read_file()| cache their output
--- by default. It means that after a file is first read, changing it won't have
--- effect during current Neovim session. See |MiniSnippets.gen_loader| about how
--- to reset cache if necessary.
---
--- # Select from all available snippets in current context ~
---
--- With |MiniSnippets.default_match()|, expand snippets (<C-j> by default) at line
--- start or after whitespace. To be able to always select from all current
--- context snippets, make mapping similar to the following: >lua
---
--- local rhs = function() MiniSnippets.expand({ match = false }) end
--- vim.keymap.set('i', '<C-g><C-j>', rhs, { desc = 'Expand all' })
--- <
--- # "Supertab"-like <Tab> / <S-Tab> mappings ~
---
--- This module intentionally by default uses separate keys to expand and jump as
--- it enables cleaner use of nested sessions. Here is an example of setting up
--- custom <Tab> to "expand or jump" and <S-Tab> to "jump to previous": >lua
---
--- local snippets = require('mini.snippets')
--- local match_strict = function(snips)
--- -- Do not match with whitespace to cursor's left
--- return snippets.default_match(snips, { pattern_fuzzy = '%S+' })
--- end
--- snippets.setup({
--- -- ... Set up snippets ...
--- mappings = { expand = '', jump_next = '', jump_prev = '' },
--- expand = { match = match_strict },
--- })
--- local expand_or_jump = function()
--- local can_expand = #MiniSnippets.expand({ insert = false }) > 0
--- if can_expand then vim.schedule(MiniSnippets.expand); return '' end
--- local is_active = MiniSnippets.session.get() ~= nil
--- if is_active then MiniSnippets.session.jump('next'); return '' end
--- return '\t'
--- end
--- local jump_prev = function() MiniSnippets.session.jump('prev') end
--- vim.keymap.set('i', '<Tab>', expand_or_jump, { expr = true })
--- vim.keymap.set('i', '<S-Tab>', jump_prev)
--- <
--- # Stop session immediately after jumping to final tabstop ~
---
--- Utilize a dedicated |MiniSnippets-events|: >lua
---
--- local fin_stop = function(args)
--- if args.data.tabstop_to == '0' then MiniSnippets.session.stop() end
--- end
--- local au_opts = { pattern = 'MiniSnippetsSessionJump', callback = fin_stop }
--- vim.api.nvim_create_autocmd('User', au_opts)
--- <
--- # Stop all sessions on Normal mode exit ~
---
--- Use |ModeChanged| and |MiniSnippets-events| events: >lua
---
--- local make_stop = function()
--- local au_opts = { pattern = '*:n', }
--- au_opts.callback = function()
--- while MiniSnippets.session.get() do
--- MiniSnippets.session.stop()
--- end
--- end
--- vim.api.nvim_create_autocmd('ModeChanged', au_opts)
--- end
--- local opts = { pattern = 'MiniSnippetsSessionStart', callback = make_stop }
--- vim.api.nvim_create_autocmd('User', opts)
--- <
--- # Customize variable evaluation ~
---
--- Create environment variables and `config.expand.insert` wrapper: >lua
---
--- -- Use evnironment variables with value is same for all snippet sessions
--- vim.loop.os_setenv('USERNAME', 'user')
---
--- -- Compute custom lookup for variables with dynamic values
--- local insert_with_lookup = function(snippet)
--- local lookup = {
--- TM_SELECTED_TEXT = table.concat(vim.fn.getreg('a', true, true), '\n'),
--- }
--- return MiniSnippets.default_insert(snippet, { lookup = lookup })
--- end
---
--- require('mini.snippets').setup({
--- -- ... Set up snippets ...
--- expand = { insert = insert_with_lookup },
--- })
--- <
--- # Using Neovim's built-ins to insert snippet ~
---
--- Define custom `expand.insert` in |MiniSnippets.config| and mappings: >lua
---
--- require('mini.snippets').setup({
--- -- ... Set up snippets ...
--- expand = {
--- insert = function(snippet, _) vim.snippet.expand(snippet.body) end
--- }
--- })
--- -- Make jump mappings or skip to use built-in <Tab>/<S-Tab> in Neovim>=0.11
--- local jump_next = function()
--- if vim.snippet.active({direction = 1}) then return vim.snippet.jump(1) end
--- end
--- local jump_prev = function()
--- if vim.snippet.active({direction = -1}) then vim.snippet.jump(-1) end
--- end
--- vim.keymap.set({ 'i', 's' }, '<C-l>', jump_next)
--- vim.keymap.set({ 'i', 's' }, '<C-h>', jump_prev)
--- <
--- # Using 'mini.snippets' in other plugins ~
--- *MiniSnippets-in-other-plugins*
---
--- - Perform a `_G.MiniSnippets ~= nil` check before using any feature. This
--- ensures that user explicitly set up 'mini.snippets'.
---
--- - To insert snippet given its body (like |vim.snippet.expand()|), use: >lua
---
--- -- Use configured `insert` method with falling back to default
--- local insert = MiniSnippets.config.expand.insert
--- or MiniSnippets.default_insert
--- -- Insert at cursor
--- insert({ body = snippet })
--- <
--- - To get available snippets, use: >lua
---
--- -- Get snippets matched at cursor
--- MiniSnippets.expand({ insert = false })
---
--- -- Get all snippets available at cursor context
--- MiniSnippets.expand({ match = false, insert = false })
--- <
---@tag MiniSnippets-examples
---@alias __minisnippets_cache_opt <cache> `(boolean)` - whether to use cached output. Default: `true`.
---@alias __minisnippets_silent_opt <silent> `(boolean)` - whether to hide non-error messages. Default: `false`.
---@alias __minisnippets_loader_return function Snippet loader.
---@diagnostic disable:undefined-field
---@diagnostic disable:discard-returns
---@diagnostic disable:unused-local
-- Module definition ==========================================================
local MiniSnippets = {}
local H = {}
--- Module setup
---
---@param config table|nil Module config table. See |MiniSnippets.config|.
---
---@usage >lua
--- require('mini.snippets').setup({}) -- replace {} with your config table
--- -- needs `snippets` field present
--- <
MiniSnippets.setup = function(config)
-- Export module
_G.MiniSnippets = MiniSnippets
-- Setup config
config = H.setup_config(config)
-- Apply config
H.apply_config(config)
-- Define behavior
H.create_autocommands()
-- Create default highlighting
H.create_default_hl()
end
--- Defaults ~
---@eval return MiniDoc.afterlines_to_code(MiniDoc.current.eval_section)
---@text # Loaded snippets ~
---
--- `config.snippets` is an array containing snippet data which can be: snippet
--- table, function loader, or (however deeply nested) array of snippet data.
---
--- Snippet is a table with the following fields:
---
--- - <prefix> `(string|table|nil)` - string used to match against current text.
--- If array, all strings should be used as separate prefixes.
--- - <body> `(string|table|nil)` - content of a snippet which should follow
--- the |MiniSnippets-syntax-specification|. Array is concatenated with `"\n"`.
--- - <desc> `(string|table|nil)` - description of snippet. Can be used to display
--- snippets in a more human readable form. Array is concatenated with `"\n"`.
---
--- Function loaders are expected to be called with single `context` table argument
--- (containing any data about current context) and return same as `config.snippets`
--- data structure.
---
--- `config.snippets` is resolved with `config.prepare` on every expand.
--- See |MiniSnippets.default_prepare()| for how it is done by default.
---
--- For a practical example see |MiniSnippets-examples|.
--- Here is an illustration of `config.snippets` customization capabilities: >lua
---
--- local gen_loader = require('mini.snippets').gen_loader
--- require('mini.snippets').setup({
--- snippets = {
--- -- Load custom file with global snippets first (order matters)
--- gen_loader.from_file('~/.config/nvim/snippets/global.json'),
---
--- -- Or add them here explicitly
--- { prefix='cdate', body='$CURRENT_YEAR-$CURRENT_MONTH-$CURRENT_DATE' },
---
--- -- Load snippets based on current language by reading files from
--- -- "snippets/" subdirectories from 'runtimepath' directories.
--- gen_loader.from_lang(),
---
--- -- Load project-local snippets with `gen_loader.from_file()`
--- -- and relative path (file doesn't have to be present)
--- gen_loader.from_file('.vscode/project.code-snippets'),
---
--- -- Custom loader for language-specific project-local snippets
--- function(context)
--- local rel_path = '.vscode/' .. context.lang .. '.code-snippets'
--- if vim.fn.filereadable(rel_path) == 0 then return end
--- return MiniSnippets.read_file(rel_path)
--- end,
---
--- -- Ensure that some prefixes are not used (as there is no `body`)
--- { prefix = { 'bad', 'prefix' } },
--- }
--- })
--- <
--- # Mappings ~
---
--- `config.mappings` describes which mappings are automatically created.
---
--- `mappings.expand` is created globally in Insert mode and is used to expand
--- snippet at cursor. Use |MiniSnippets.expand()| for custom mappings.
---
--- `mappings.jump_next`, `mappings.jump_prev`, and `mappings.stop` are created for
--- the duration of active snippet session(s) from |MiniSnippets.default_insert()|.
--- Used to jump to next/previous tabstop and stop active session respectively.
--- Use |MiniSnippets.session.jump()| and |MiniSnippets.session.stop()| for custom
--- Insert mode mappings.
--- Note: do not use `"<C-n>"` or `"<C-p>"` for any action as they conflict with
--- built-in completion: it forces them to mean "change focus to next/previous
--- completion item". This matters more frequently than when there is a tabstop
--- with choices due to how this module handles built-in completion during jumps.
---
--- # Expand ~
---
--- `config.expand` defines expand steps (see |MiniSnippets-glossary|), either after
--- pressing `mappings.expand` or starting manually via |MiniSnippets.expand()|.
---
--- `expand.prepare` is a function that takes `raw_snippets` in the form of
--- `config.snippets` and should return a plain array of snippets (as described
--- in |MiniSnippets-glossary|). Will be called on every |MiniSnippets.expand()| call.
--- If returns second value, it will be used as context for warning messages.
--- Default: |MiniSnippets.default_prepare()|.
---
--- `expand.match` is a function that takes `expand.prepare` output and returns
--- an array of matched snippets: one or several snippets user might intend to
--- eventually insert. Should sort matches in output from best to worst.
--- Entries can contain `region` field with current buffer region used to do
--- the match; usually it needs to be removed (similar to how |ins-completion|
--- and |abbreviations| work).
--- Default: |MiniSnippets.default_match()|
---
--- `expand.select` is a function that takes output of `expand.match` and function
--- that inserts snippet (and also ensures Insert mode and removes snippet's match
--- region). Should allow user to perform interactive snippet selection and
--- insert the chosen one. Designed to be compatible with |vim.ui.select()|.
--- Called for any non-empty `expand.match` output (even with single entry).
--- Default: |MiniSnippets.default_select()|
---
--- `expand.insert` is a function that takes single snippet table as input and
--- inserts snippet at cursor position. This is a main entry point for adding
--- text template to buffer and starting a snippet session.
--- If called inside |MiniSnippets.expand()| (which is a usual interactive case),
--- all it has to do is insert snippet at cursor position. Ensuring Insert mode
--- and removing matched snippet region is done beforehand.
--- Default: |MiniSnippets.default_insert()|
---
--- Illustration of `config.expand` customization: >lua
---
--- -- Supply extra data as context
--- local my_p = function(raw_snippets)
--- local _, cont = MiniSnippets.default_prepare({})
--- cont.cursor = vim.api.nvim_win_get_cursor()
--- return MiniSnippets.default_prepare(raw_snippets, { context = cont })
--- end
--- -- Perform fuzzy match based only on alphanumeric characters
--- local my_m = function(snippets)
--- return MiniSnippets.default_match(snippets, { pattern_fuzzy = '%w*' })
--- end
--- -- Always insert the best matched snippet
--- local my_s = function(snippets, insert) return insert(snippets[1]) end
--- -- Use different string to show empty tabstop as inline virtual text
--- local my_i = function(snippet)
--- return MiniSnippets.default_insert(snippet, { empty_tabstop = '$' })
--- end
---
--- require('mini.snippets').setup({
--- -- ... Set up snippets ...
--- expand = { prepare = my_p, match = my_m, select = my_s, insert = my_i }
--- })
--- <
MiniSnippets.config = {
-- Array of snippets and loaders (see |MiniSnippets.config| for details).
-- Nothing is defined by default. Add manually to have snippets to match.
snippets = {},
-- Module mappings. Use `''` (empty string) to disable one.
mappings = {
-- Expand snippet at cursor position. Created globally in Insert mode.
expand = '<C-j>',
-- Interact with default `expand.insert` session.
-- Created for the duration of active session(s)
jump_next = '<C-l>',
jump_prev = '<C-h>',
stop = '<C-c>',
},
-- Functions describing snippet expansion. If `nil`, default values
-- are `MiniSnippets.default_<field>()`.
expand = {
-- Resolve raw config snippets at context
prepare = nil,
-- Match resolved snippets at cursor position
match = nil,
-- Possibly choose among matched snippets
select = nil,
-- Insert selected snippet
insert = nil,
},
}
--minidoc_afterlines_end
--- Expand snippet at cursor position
---
--- Perform expand steps (see |MiniSnippets-glossary|).
--- Initial raw snippets are taken from `config.snippets` in current buffer.
--- Snippets from `vim.b.minisnippets_config` are appended to global snippet array.
---
---@param opts table|nil Options. Same structure as `expand` in |MiniSnippets.config|
--- and uses its values as default. There are differences in allowed values:
--- - Use `match = false` to have all buffer snippets as matches.
--- - Use `select = false` to always expand the best match (if any).
--- - Use `insert = false` to return all matches without inserting.
---
--- Note: `opts.insert` is called after ensuring Insert mode, removing snippet's
--- match region, and positioning cursor.
---
---@return table|nil If `insert` is `false`, an array of matched snippets (`expand.match`
--- output). Otherwise `nil`.
---
---@usage >lua
--- -- Match, maybe select, and insert
--- MiniSnippets.expand()
---
--- -- Match and force expand the best match (if any)
--- MiniSnippets.expand({ select = false })
---
--- -- Use all current context snippets as matches
--- MiniSnippets.expand({ match = false })
---
--- -- Get all matched snippets
--- local matches = MiniSnippets.expand({ insert = false })
---
--- -- Get all current context snippets
--- local all = MiniSnippets.expand({ match = false, insert = false })
--- <
---
---@seealso |MiniSnippets.start_lsp_server()| to instead show loaded snippets
--- in (auto)completion engines (like |mini.completion|).
MiniSnippets.expand = function(opts)
if H.is_disabled() then return end
local config = H.get_config()
opts = vim.tbl_extend('force', config.expand, opts or {})
-- Validate
local prepare = opts.prepare or MiniSnippets.default_prepare
if not vim.is_callable(prepare) then H.error('`opts.prepare` should be callable') end
local match = false
if opts.match ~= false then match = opts.match or MiniSnippets.default_match end
if not (match == false or vim.is_callable(match)) then H.error('`opts.match` should be `false` or callable') end
local select = false
if opts.select ~= false then select = opts.select or MiniSnippets.default_select end
if not (select == false or vim.is_callable(select)) then H.error('`opts.select` should be `false` or callable') end
local insert = false
if opts.insert ~= false then insert = opts.insert or MiniSnippets.default_insert end
if not (insert == false or vim.is_callable(insert)) then H.error('`opts.insert` should be `false` or callable') end
-- Match
local all_snippets, context = prepare(config.snippets)
if not H.is_array_of(all_snippets, H.is_snippet) then H.error('`prepare` should return array of snippets') end
local matches = match == false and all_snippets or match(all_snippets)
if not H.is_array_of(matches, H.is_snippet) then H.error('`match` should return array of snippets') end
-- Act
if insert == false then return matches end
if #all_snippets == 0 then return H.notify('No snippets in context:\n' .. vim.inspect(context), 'WARN') end
if #matches == 0 then return H.notify('No matches in context:\n' .. vim.inspect(context), 'WARN') end
local insert_ext = H.make_extended_insert(insert)
if select == false then return insert_ext(matches[1]) end
select(matches, insert_ext)
end
--- Generate snippet loader
---
--- This is a table with function elements. Call to actually get a loader.
---
--- Common features for all produced loaders:
--- - Designed to work with |MiniSnippets-file-specification|.
--- - Cache output by default, i.e. second and later calls with same input value
--- don't read file system. Different loaders from same generator share cache.
--- Disable by setting `opts.cache` to `false`.
--- To clear all cache, call |MiniSnippets.setup()|. For example:
--- `MiniSnippets.setup(MiniSnippets.config)`
--- - Use |vim.notify()| to show problems during loading while trying to load as
--- much correctly defined snippet data as possible.
--- Disable by setting `opts.silent` to `true`.
MiniSnippets.gen_loader = {}
--- Generate language loader
---
--- Output loads files from "snippets/" subdirectories of 'runtimepath' matching
--- configured language patterns.
--- See |MiniSnippets.gen_loader.from_runtime()| for runtime loading details.
---
--- Language is taken from <lang> field (if present with string value) of `context`
--- argument used in loader calls during "prepare" stage.
--- This is compatible with |MiniSnippets.default_prepare()| and most snippet
--- collection plugins.
---
---@param opts table|nil Options. Possible values:
--- - <lang_patterns> `(table)` - map from language to array of runtime patterns
--- used to find snippet files, as in |MiniSnippets.gen_loader.from_runtime()|.
--- Patterns will be processed in order. With |MiniSnippets.default_prepare()|
--- it means if snippets have same prefix, data from later patterns is used.
--- To interactively check the current language with default context, execute
--- `:=MiniSnippets.default_prepare({})` and see data in the second table.
---
--- Default pattern array (for non-empty language) is constructed as to read
--- `*.json` and `*.lua` files that are:
--- - Inside "snippets/" subdirectory named as language (files can be however
--- deeply nested).
--- - Named as language and is in "snippets/" directory (however deep).
--- Example for "lua" language: >lua
--- { 'lua/**/*.json', 'lua/**/*.lua', '**/lua.json', '**/lua.lua' }
--- <
--- Add entry for `""` (empty string) as language to be sourced when `lang`
--- context is empty string (which is usually temporary scratch buffers).
---
--- - __minisnippets_cache_opt
--- Note: caching is done per used runtime pattern, not `lang` value to allow
--- different `from_lang()` loaders to share cache.
--- - __minisnippets_silent_opt
---
---@return __minisnippets_loader_return
---
---@usage >lua
--- -- Adjust language patterns
--- local latex_patterns = { 'latex/**/*.json', '**/latex.json' }
--- local lang_patterns = {
--- tex = latex_patterns, plaintex = latex_patterns,
--- -- Recognize special injected language of markdown tree-sitter parser
--- markdown_inline = { 'markdown.json' },
--- }
--- local gen_loader = require('mini.snippets').gen_loader
--- require('mini.snippets').setup({
--- snippets = {
--- gen_loader.from_lang({ lang_patterns = lang_patterns }),
--- },
--- })
--- <
MiniSnippets.gen_loader.from_lang = function(opts)
opts = vim.tbl_extend('force', { lang_patterns = {}, cache = true, silent = false }, opts or {})
for lang, tbl in pairs(opts.lang_patterns) do
if type(lang) ~= 'string' then H.error('Keys of `opts.lang_patterns` should be string language names') end
if not H.is_array_of(tbl, H.is_string) then H.error('Values of `opts.lang_patterns` should be string arrays') end
end
local loaders, loader_opts = {}, { cache = opts.cache, silent = opts.silent }
return function(context)
local lang = (context or {}).lang
if type(lang) ~= 'string' then return {} end
local patterns = opts.lang_patterns[lang]
if patterns == nil and lang == '' then return {} end
-- NOTE: Don't use `{json,lua}` for better compatibility, as it seems that
-- its support might depend on the shell (and might not work on Windows).
-- Which is shame because fewer patterns used mean fewer calls to cache.
patterns = patterns
or { lang .. '/**/*.json', lang .. '/**/*.lua', '**/' .. lang .. '.json', '**/' .. lang .. '.lua' }
local res = {}
for _, pat in ipairs(patterns) do
local loader = loaders[pat] or MiniSnippets.gen_loader.from_runtime(pat, loader_opts)
loaders[pat] = loader
table.insert(res, loader(context))
end
return res
end
end
--- Generate runtime loader
---
--- Output loads files which match `pattern` inside "snippets/" directories from
--- 'runtimepath'. This is useful to simultaneously read several similarly
--- named files from different sources. Order from 'runtimepath' is preserved.
---
--- Typical case is loading snippets for a language from files like `xxx.{json,lua}`
--- but located in different "snippets/" directories inside 'runtimepath'.
--- - `<config>`/snippets/lua.json - manually curated snippets in user config.
--- - `<path/to/installed/plugin>`/snippets/lua.json - from installed plugin.
--- - `<config>`/after/snippets/lua.json - used to adjust snippets from plugins.
--- For example, remove some snippets by using prefixes and no body.
---
---@param pattern string Pattern of files to read. Can have wildcards as described
--- in |nvim_get_runtime_file()|. Example for "lua" language: `'lua.{json,lua}'`.
---@param opts table|nil Options. Possible fields:
--- - <all> `(boolean)` - whether to load from all matching runtime files.
--- Default: `true`.
--- - __minisnippets_cache_opt
--- Note: caching is done per `pattern` value, which assumes that both
--- 'runtimepath' value and snippet files do not change during Neovim session.
--- Caching this way gives significant speed improvement by reducing the need
--- to traverse file system on every snippet expand.
--- - __minisnippets_silent_opt
---
---@return __minisnippets_loader_return
MiniSnippets.gen_loader.from_runtime = function(pattern, opts)
if type(pattern) ~= 'string' then H.error('`pattern` should be string') end
opts = vim.tbl_extend('force', { all = true, cache = true, silent = false }, opts or {})
pattern = 'snippets/' .. pattern
local cache, read_opts = opts.cache, { cache = opts.cache, silent = opts.silent }
local read = function(p) return MiniSnippets.read_file(p, read_opts) end
return function()
if cache and H.cache.runtime[pattern] ~= nil then return vim.deepcopy(H.cache.runtime[pattern]) end
local res = vim.tbl_map(read, vim.api.nvim_get_runtime_file(pattern, opts.all))
if cache then H.cache.runtime[pattern] = vim.deepcopy(res) end
return res
end
end
--- Generate single file loader
---
--- Output is a thin wrapper around |MiniSnippets.read_file()| which will skip
--- warning if file is absent (other messages are still shown). Use it to load
--- file which is not guaranteed to exist (like project-local snippets).
---
---@param path string Same as in |MiniSnippets.read_file()|.
---@param opts table|nil Same as in |MiniSnippets.read_file()|.
---
---@return __minisnippets_loader_return
MiniSnippets.gen_loader.from_file = function(path, opts)
if type(path) ~= 'string' then H.error('`path` should be string') end
opts = vim.tbl_extend('force', { cache = true, silent = false }, opts or {})
return function()
local full_path = vim.fn.fnamemodify(path, ':p')
if vim.fn.filereadable(full_path) ~= 1 then return {} end
return MiniSnippets.read_file(full_path, opts) or {}
end
end
--- Read file with snippet data
---
---@param path string Path to file with snippets. Can be relative.
--- See |MiniSnippets-file-specification| for supported file formats.
---@param opts table|nil Options. Possible fields:
--- - __minisnippets_cache_opt
--- Note: Caching is done per full path only after successful reading.
--- - __minisnippets_silent_opt
---
---@return table|nil Array of snippets or `nil` if failed (also warn with |vim.notify()|
--- about the reason).