unofficial mirror of emacs-devel@gnu.org 
 help / color / mirror / code / Atom feed
blob 9431ffccb79da56ec1ed8c54bd4de8c28e4e2fed 55486 bytes (raw)
name: lisp/icomplete.el 	 # note: path name is non-authoritative(*)

   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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
 
;;; icomplete.el --- minibuffer completion incremental feedback -*- lexical-binding: t -*-

;; Copyright (C) 1992-1994, 1997, 1999, 2001-2022 Free Software
;; Foundation, Inc.

;; Author: Ken Manheimer <ken dot manheimer at gmail...>
;; Created: Mar 1993 Ken Manheimer, klm@nist.gov - first release to usenet
;; Keywords: help, abbrev

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

;;; Commentary:

;; Enabling this package implements a more fine-grained minibuffer
;; completion feedback scheme.  Prospective completions are concisely
;; indicated within the minibuffer itself, with each successive
;; keystroke.

;; See `icomplete-completions' docstring for a description of the
;; icomplete display format.

;; See the `icomplete-minibuffer-setup-hook' docstring for a means to
;; customize icomplete setup for interoperation with other
;; minibuffer-oriented packages.

;; To enable/disable icomplete mode, use the `icomplete-mode' function.

;; Thanks to everyone for their suggestions for refinements of this
;; package.  I particularly have to credit Michael Cook, who
;; implemented an incremental completion style in his 'iswitch'
;; functions that served as a model for icomplete.  Some other
;; contributors: Noah Friedman (restructuring as minor mode), Colin
;; Rafferty (lemacs reconciliation), Lars Lindberg, RMS, and others.

;; klm.

;;; Code:

(require 'rfn-eshadow) ; rfn-eshadow-overlay
(require 'simple) ; max-mini-window-lines
(require 'cl-lib)

(defgroup icomplete nil
  "Show completions dynamically in minibuffer."
  :prefix "icomplete-"
  :link '(info-link "(emacs)Icomplete")
  :group 'minibuffer)

(defcustom icomplete-separator " | "
  "String used by Icomplete to separate alternatives in the minibuffer."
  :type 'string
  :version "24.4")

(defcustom icomplete-hide-common-prefix t
  "When non-nil, hide common prefix from completion candidates.
When nil, show candidates in full."
  :type 'boolean
  :version "24.4")

(defvar icomplete-tidy-shadowed-file-names nil
  "If non-nil, automatically delete superfluous parts of file names.
For example, if the user types ~/ after a long path name,
everything preceding the ~/ is discarded so the interactive
selection process starts again from the user's $HOME.")

(defcustom icomplete-show-matches-on-no-input nil
  "When non-nil, show completions when first prompting for input.
This means to show completions even when the current minibuffer contents
is the same as was the initial input after minibuffer activation.
This also means that if you traverse the list of completions with
commands like `C-.' and just hit RET without typing any
characters, the match under point will be chosen instead of the
default."
  :type 'boolean
  :version "24.4")

(defcustom icomplete-with-completion-tables t
  "Specialized completion tables with which Icomplete should operate.
If this is t, Icomplete operates on all tables.
Otherwise this should be a list of the completion tables (e.g.,
`internal-complete-buffer') on which Icomplete should operate."
  ;; Prior to 24.4, not a user-option, default '(internal-complete-buffer).
  :version "24.4"
  :type '(choice (const :tag "All" t)
		 (repeat function)))

(defcustom icomplete-matches-format "%s/%s "
  "Format of the current/total number of matches for the prompt prefix."
  :version "28.1"
  :type '(choice (const :tag "No prefix" nil)
                 (string :tag "Prefix format string")))

(defface icomplete-first-match '((t :weight bold))
  "Face used by Icomplete for highlighting first match."
  :version "24.4")

(defface icomplete-selected-match '((t :inherit highlight))
  "Face used by `icomplete-vertical-mode' for the selected candidate."
  :version "28.1")

(defface icomplete-section '((t :inherit shadow :slant italic))
  "Face used by `icomplete-vertical-mode' for the section title."
  :version "28.1")

;;;_* User Customization variables
(defcustom icomplete-prospects-height 2
  ;; We used to compute how many lines 100 characters would take in
  ;; the current window width, but the return value of `window-width'
  ;; is unreliable on startup (e.g., if we're in daemon mode), so now
  ;; we simply base the default value on an 80 column window.
  "Maximum number of lines to use in the minibuffer."
  :type 'integer
  :version "26.1")

(defcustom icomplete-compute-delay .15
  "Completions-computation stall, used only with large-number completions.
See `icomplete-delay-completions-threshold'."
  :type 'number)

(defcustom icomplete-delay-completions-threshold 400
  "Pending-completions number over which to apply `icomplete-compute-delay'."
  :type 'integer)

(defcustom icomplete-max-delay-chars 2
  "Maximum number of initial chars to apply `icomplete-compute-delay'."
  :type 'integer)

(defvar icomplete-in-buffer nil
  "If non-nil, also use Icomplete when completing in non-mini buffers.")

(defcustom icomplete-minibuffer-setup-hook nil
  "Icomplete-specific customization of minibuffer setup.

This hook is run during minibuffer setup if Icomplete is active.
It is intended for use in customizing Icomplete for interoperation
with other features and packages.  For instance:

  (add-hook \\='icomplete-minibuffer-setup-hook
	     (lambda () (setq-local max-mini-window-height 3)))

will constrain Emacs to a maximum minibuffer height of 3 lines when
icompletion is occurring."
  :type 'hook
  :group 'icomplete)


;;;_* Initialization

;;;_ + Internal Variables
;;;_  = icomplete-eoinput nil
(defvar icomplete-overlay (make-overlay (point-min) (point-min) nil t t)
  "Overlay used to display the list of completions.")

(defvar icomplete--initial-input nil
  "Initial input in the minibuffer when `icomplete-mode' was activated.
Used to implement the option `icomplete-show-matches-on-no-input'.")

(defun icomplete-post-command-hook ()
  (let ((non-essential t)) ;E.g. don't prompt for password!
    (icomplete-exhibit)))

(defvar icomplete-minibuffer-map
  (let ((map (make-sparse-keymap)))
    (define-key map [?\M-\t] 'icomplete-force-complete)
    (define-key map [remap minibuffer-complete-and-exit] 'icomplete-ret)
    (define-key map [?\C-j]  'icomplete-force-complete-and-exit)
    (define-key map [?\C-.]  'icomplete-forward-completions)
    (define-key map [?\C-,]  'icomplete-backward-completions)
    map)
  "Keymap used by `icomplete-mode' in the minibuffer.")

(defun icomplete-ret ()
  "Exit minibuffer for icomplete."
  (interactive)
  (if (and icomplete-show-matches-on-no-input
           (car completion-all-sorted-completions)
           (equal (icomplete--field-string) icomplete--initial-input))
      (icomplete-force-complete-and-exit)
    (minibuffer-complete-and-exit)))

(defun icomplete-force-complete-and-exit ()
  "Complete the minibuffer with the longest possible match and exit.
Use the first of the matches if there are any displayed, and use
the default otherwise."
  (interactive)
  ;; This function is tricky.  The mandate is to "force", meaning we
  ;; should take the first possible valid completion for the input.
  ;; However, if there is no input and we can prove that that
  ;; coincides with the default, it is much faster to just call
  ;; `minibuffer-complete-and-exit'.  Otherwise, we have to call
  ;; `minibuffer-force-complete-and-exit', which needs the full
  ;; completion set and is potentially slow and blocking.  Do the
  ;; latter if:
  (if (or
       ;; there's some input, meaning the default in off the table by
       ;; definition; OR
       (not (equal (icomplete--field-string) icomplete--initial-input))
       ;; there's no input, but there's also no minibuffer default
       ;; (and the user really wants to see completions on no input,
       ;; meaning he expects a "force" to be at least attempted); OR
       (and (not minibuffer-default)
            icomplete-show-matches-on-no-input)
       ;; there's no input but the full completion set has been
       ;; calculated, This causes the first cached completion to
       ;; be taken (i.e. the one that the user sees highlighted)
       completion-all-sorted-completions)
      (minibuffer-force-complete-and-exit)
    ;; Otherwise take the faster route...
    (minibuffer-complete-and-exit)))

(defun icomplete-force-complete ()
  "Complete the icomplete minibuffer."
  (interactive)
  ;; We're not at all interested in cycling here (bug#34077).
  (minibuffer-force-complete nil nil 'dont-cycle))

;; Apropos `icomplete-scroll', we implement "scrolling icomplete"
;; within classic icomplete, which is "rotating", by contrast.
;;
;; The two variables supporing this are
;; `icomplete--scrolled-completions' and `icomplete--scrolled-past'.
;; They come into play when:
;;
;; - The user invokes commands `icomplete-forward-completions' and
;;   `icomplete-backward-completions', thus "manually" scrolling to a
;;   given position;
;;
;; - The user re-filters a selection that had already been manually
;;   scrolled.  The system attempts to keep the previous selection
;;   stable in the face of the new filtering.  This is mostly done in
;;   `icomplete--render-vertical'.
;;
(defvar icomplete-scroll nil
  "If non-nil, scroll candidates list instead of rotating it.")
(defvar icomplete--scrolled-completions nil
  "If non-nil, tail of completions list manually scrolled to.")
(defvar icomplete--scrolled-past nil
  "If non-nil, reverse tail of completions scrolled past.")

(defun icomplete-forward-completions ()
  "Step forward completions by one entry.
Second entry becomes the first and can be selected with
`icomplete-force-complete-and-exit'.
Return non-nil iff something was stepped."
  (interactive)
  (let* ((beg (icomplete--field-beg))
         (end (icomplete--field-end))
         (comps (completion-all-sorted-completions beg end)))
    (when (consp (cdr comps))
      (cond (icomplete-scroll
             (push (pop comps) icomplete--scrolled-past)
             (setq icomplete--scrolled-completions comps))
            (t
             (let ((last (last comps)))
               (setcdr (last comps) (cons (pop comps) (cdr last))))))
      (completion--cache-all-sorted-completions beg end comps))))

(defun icomplete-backward-completions ()
  "Step backward completions by one entry.
Last entry becomes the first and can be selected with
`icomplete-force-complete-and-exit'.
Return non-nil iff something was stepped."
  (interactive)
  (let* ((beg (icomplete--field-beg))
         (end (icomplete--field-end))
         (comps (completion-all-sorted-completions beg end))
         last-but-one)
    (prog1
        (cond ((and icomplete-scroll icomplete--scrolled-past)
               (push (pop icomplete--scrolled-past) comps)
               (setq icomplete--scrolled-completions comps))
              ((and (not icomplete-scroll)
                    (consp (cdr (setq last-but-one (last comps 2)))))
               ;; At least two elements in comps
               (push (car (cdr last-but-one)) comps)
               (setcdr last-but-one (cdr (cdr last-but-one)))))
      (completion--cache-all-sorted-completions beg end comps))))

(defun icomplete-vertical-goto-first ()
  "Go to first completions entry when `icomplete-scroll' is non-nil."
  (interactive)
  (unless icomplete-scroll (error "Only works with `icomplete-scroll'"))
  (while (icomplete-backward-completions)))

(defun icomplete-vertical-goto-last ()
  "Go to last completions entry when `icomplete-scroll' is non-nil."
  (interactive)
  (unless icomplete-scroll (error "Only works with `icomplete-scroll'"))
  (while (icomplete-forward-completions)))

;;;_* Helpers for `fido-mode' (or `ido-mode' emulation)

(defun icomplete-fido-kill ()
  "Kill line or current completion, like `ido-mode'.
If killing to the end of line make sense, call `kill-line',
otherwise kill the currently selected completion candidate.
Exactly what killing entails is dependent on the things being
completed.  If completing files, it means delete the file.  If
completing buffers it means kill the buffer.  Both actions
require user confirmation."
  (interactive)
  (let ((end (icomplete--field-end)))
    (if (< (point) end)
        (call-interactively 'kill-line)
      (let* ((all (completion-all-sorted-completions))
             (thing (car all))
             (cat (icomplete--category))
             (action
              (cl-case cat
                (buffer
                 (lambda ()
                   (when (yes-or-no-p (concat "Kill buffer " thing "? "))
                     (kill-buffer thing))))
                ((project-file file)
                 (lambda ()
                   (let* ((dir (file-name-directory (icomplete--field-string)))
                          (path (expand-file-name thing dir)))
                     (when (yes-or-no-p (concat "Delete file " path "? "))
                       (delete-file path) t))))
                (t
                 (error "Sorry, don't know how to kill things for `%s'" cat)))))
        (when (let (;; Allow `yes-or-no-p' to work and don't let it
                    ;; `icomplete-exhibit' anything.
                    (enable-recursive-minibuffers t)
                    (icomplete-mode nil))
                (funcall action))
          (completion--cache-all-sorted-completions
           (icomplete--field-beg)
           (icomplete--field-end)
           (cdr all)))
        (message nil)))))

(defun icomplete-fido-delete-char ()
  "Delete char or maybe call `dired', like `ido-mode'."
  (interactive)
  (let ((end (icomplete--field-end)))
    (if (or (< (point) end) (not (eq (icomplete--category) 'file)))
        (call-interactively 'delete-char)
      (dired (file-name-directory (icomplete--field-string)))
      (exit-minibuffer))))

(defun icomplete-fido-ret ()
  "Exit minibuffer or enter directory, like `ido-mode'."
  (interactive)
  (let* ((dir (and (eq (icomplete--category) 'file)
                   (file-name-directory (icomplete--field-string))))
         (current (car completion-all-sorted-completions))
         (probe (and dir current
                     (expand-file-name (directory-file-name current)
                                       (substitute-env-vars dir)))))
    (cond ((and probe (file-directory-p probe) (not (string= current "./")))
           (icomplete-force-complete))
          (t
           (icomplete-force-complete-and-exit)))))

(defun icomplete-fido-exit (force)
  "Attempt to exit minibuffer immediately with current input.
Unless FORCE is non-nil (interactively with a prefix argument),
honour a non-nil REQUIRE-MATCH argument to `completing-read' by
trying to complete as much as possible and disallowing the exit
if that doesn't produce a completion match."
  (interactive "P")
  (if (and (not force) minibuffer--require-match)
      (minibuffer-complete-and-exit)
    (exit-minibuffer)))

(defun icomplete-fido-backward-updir ()
  "Delete char before or go up directory, like `ido-mode'."
  (interactive)
  (cond ((and (eq (char-before) ?/)
              (eq (icomplete--category) 'file))
         (when (string-equal (icomplete--field-string) "~/")
           (delete-region (icomplete--field-beg) (icomplete--field-end))
           (insert (expand-file-name "~/"))
           (goto-char (line-end-position)))
         (save-excursion
           (goto-char (1- (point)))
           (when (search-backward "/" (point-min) t)
             (delete-region (1+ (point)) (point-max)))))
        (t (call-interactively 'backward-delete-char))))

(defvar icomplete-fido-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-k") 'icomplete-fido-kill)
    (define-key map (kbd "C-d") 'icomplete-fido-delete-char)
    (define-key map (kbd "RET") 'icomplete-fido-ret)
    (define-key map (kbd "C-m") 'icomplete-fido-ret)
    (define-key map (kbd "DEL") 'icomplete-fido-backward-updir)
    (define-key map (kbd "M-j") 'icomplete-fido-exit)
    (define-key map (kbd "C-s") 'icomplete-forward-completions)
    (define-key map (kbd "C-r") 'icomplete-backward-completions)
    (define-key map (kbd "<right>") 'icomplete-forward-completions)
    (define-key map (kbd "<left>") 'icomplete-backward-completions)
    (define-key map (kbd "C-.") 'icomplete-forward-completions)
    (define-key map (kbd "C-,") 'icomplete-backward-completions)
    map)
  "Keymap used by `fido-mode' in the minibuffer.")

(defun icomplete--fido-mode-setup ()
  "Setup `fido-mode''s minibuffer."
  (when (and icomplete-mode (icomplete-simple-completing-p))
    (use-local-map (make-composed-keymap icomplete-fido-mode-map
                                         (current-local-map)))
    (setq-local icomplete-tidy-shadowed-file-names t
                icomplete-show-matches-on-no-input t
                icomplete-hide-common-prefix nil
                icomplete-scroll (not (null icomplete-vertical-mode))
                completion-styles '(flex)
                completion-flex-nospace nil
                completion-category-defaults nil
                completion-ignore-case t
                read-buffer-completion-ignore-case t
                read-file-name-completion-ignore-case t)))

;;;###autoload
(define-minor-mode fido-mode
  "An enhanced `icomplete-mode' that emulates `ido-mode'.

This global minor mode makes minibuffer completion behave
more like `ido-mode' than regular `icomplete-mode'."
  :global t :group 'icomplete
  (remove-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup)
  (remove-hook 'minibuffer-setup-hook #'icomplete--fido-mode-setup)
  (when fido-mode
    (icomplete-mode -1)
    (setq icomplete-mode t)
    (add-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup)
    (add-hook 'minibuffer-setup-hook #'icomplete--fido-mode-setup)))

;;;_ > icomplete-mode (&optional prefix)
;;;###autoload
(define-minor-mode icomplete-mode
  "Toggle incremental minibuffer completion (Icomplete mode).

When this global minor mode is enabled, typing in the minibuffer
continuously displays a list of possible completions that match
the string you have typed.  See `icomplete-completions' for a
description of how prospective completions are displayed.

For more information, see Info node `(emacs)Icomplete'.
For options you can set, `\\[customize-group] icomplete'.

You can use the following key bindings to navigate and select
completions:

\\{icomplete-minibuffer-map}"
  :global t :group 'icomplete
  (remove-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup)
  (remove-hook 'completion-in-region-mode-hook #'icomplete--in-region-setup)
  (when icomplete-mode
    (fido-mode -1)
    (when icomplete-in-buffer
      (add-hook 'completion-in-region-mode-hook #'icomplete--in-region-setup))
    (add-hook 'minibuffer-setup-hook #'icomplete-minibuffer-setup)))

(defun icomplete--completion-table ()
  (if (window-minibuffer-p) minibuffer-completion-table
    (or (nth 2 completion-in-region--data)
	(message "In %S (w=%S): %S"
		 (current-buffer) (selected-window) (window-minibuffer-p)))))
(defun icomplete--completion-predicate ()
  (if (window-minibuffer-p) minibuffer-completion-predicate
    (nth 3 completion-in-region--data)))
(defun icomplete--field-string ()
  (if (window-minibuffer-p) (minibuffer-contents)
    (buffer-substring-no-properties
     (nth 0 completion-in-region--data)
     (nth 1 completion-in-region--data))))
(defun icomplete--field-beg ()
  (if (window-minibuffer-p) (minibuffer-prompt-end)
    (nth 0 completion-in-region--data)))
(defun icomplete--field-end ()
  (if (window-minibuffer-p) (point-max)
    (nth 1 completion-in-region--data)))
(defun icomplete--category ()
  (let* ((beg (icomplete--field-beg))
         (md (completion--field-metadata beg)))
    (alist-get 'category (cdr md))))

;;;_ > icomplete-simple-completing-p ()
(defun icomplete-simple-completing-p ()
  "Non-nil if current window is a minibuffer that's doing simple completion.

Conditions are:
   the selected window is a minibuffer,
   and not in the middle of macro execution,
   and the completion table is not a function (which would
       indicate some non-standard, non-simple completion mechanism,
       like file-name and other custom-func completions),
   and `icomplete-with-completion-tables' doesn't restrict completion."

  (unless executing-kbd-macro
    (let ((table (icomplete--completion-table)))
      (and table
           (or (not (functionp table))
               (eq icomplete-with-completion-tables t)
               (member table icomplete-with-completion-tables))))))

;;;_ > icomplete-minibuffer-setup ()
(defun icomplete-minibuffer-setup ()
  "Run in minibuffer on activation to establish incremental completion.
Usually run by inclusion in `minibuffer-setup-hook'."
  (when (and icomplete-mode (icomplete-simple-completing-p))
    (setq-local icomplete--initial-input (icomplete--field-string))
    (setq-local completion-show-inline-help nil)
    (setq icomplete--scrolled-completions nil)
    (use-local-map (make-composed-keymap icomplete-minibuffer-map
    					 (current-local-map)))
    (add-hook 'post-command-hook #'icomplete-post-command-hook nil t)
    (run-hooks 'icomplete-minibuffer-setup-hook)))

(defvar icomplete--in-region-buffer nil)

(defun icomplete--in-region-setup ()
  (when (or (not completion-in-region-mode)
	    (and icomplete--in-region-buffer
		 (not (eq icomplete--in-region-buffer (current-buffer)))))
    (with-current-buffer (or icomplete--in-region-buffer (current-buffer))
      (setq icomplete--in-region-buffer nil)
      (delete-overlay icomplete-overlay)
      (kill-local-variable 'completion-show-inline-help)
      (remove-hook 'post-command-hook 'icomplete-post-command-hook t)
      (message nil)))
  (when (and completion-in-region-mode
	     icomplete-mode (icomplete-simple-completing-p))
    (setq icomplete--in-region-buffer (current-buffer))
    (setq-local completion-show-inline-help nil)
    (let ((tem (assq 'completion-in-region-mode
		     minor-mode-overriding-map-alist)))
      (unless (memq icomplete-minibuffer-map (cdr tem))
	(setcdr tem (make-composed-keymap icomplete-minibuffer-map
					  (cdr tem)))))
    (add-hook 'post-command-hook 'icomplete-post-command-hook nil t)))

(defun icomplete--sorted-completions ()
  (or completion-all-sorted-completions
      (cl-loop
       initially (setq icomplete--scrolled-past nil) ; Invalidate scrolled state
       with beg = (icomplete--field-beg)
       with end = (icomplete--field-end)
       with all = (completion-all-sorted-completions beg end)
       ;; Icomplete mode re-sorts candidates, bubbling the default to
       ;; top if it's found somewhere down the list.  This loop's
       ;; iteration variable, `fn' iterates through these "bubble up
       ;; predicates" which may vary depending on specific
       ;; `completing-read' invocations, described below:
       for fn in (cond ((and minibuffer-default
                             (stringp minibuffer-default) ; bug#38992
                             (equal (icomplete--field-string) icomplete--initial-input))
                        ;; Here, we have a non-nil string default and
                        ;; no input whatsoever.  We want to make sure
                        ;; that the default is bubbled to the top so
                        ;; that `icomplete-force-complete-and-exit'
                        ;; will select it.  We want to do that even if
                        ;; the match doesn't match the completion
                        ;; perfectly.
                        ;;
                        `(;; The first predicate ensures that:
                          ;;
                          ;; (completing-read "thing? " '("foo" "bar")
                          ;;                  nil nil nil nil "bar")
                          ;;
                          ;; Has "bar" at the top, so RET will select
                          ;; it, as desired.
                          ,(lambda (comp)
                             (equal minibuffer-default comp))
                          ;; Why do we need this second predicate?
                          ;; Because that'll make things like M-x man
                          ;; RET RET, when invoked with point on the
                          ;; "bar" word, behave correctly.  There, the
                          ;; default doesn't quite match any
                          ;; candidate. So:
                          ;;
                          ;; (completing-read "Man entry? " '("foo(1)" "bar(1)")
                          ;;                  nil nil nil nil "bar")
                          ;;
                          ;; Will place "bar(1)" on top, and RET will
                          ;; select it -- again, as desired.
                          ;;
                          ;; FIXME: it's arguable that this second
                          ;; behaviour should be a property of the
                          ;; completion table and not the completion
                          ;; frontend such as we have done
                          ;; here. However, it seems generically
                          ;; useful for a very broad spectrum of
                          ;; cases.
                          ,(lambda (comp)
                             (string-prefix-p minibuffer-default comp))))
                       ((and fido-mode
                             (not minibuffer-default)
                             (eq (icomplete--category) 'file))
                        ;; When there isn't a default, `fido-mode'
                        ;; specifically also has some extra
                        ;; file-sorting semantics inherited from Ido.
                        ;; Those make the directory "./" bubble to the
                        ;; top (if it exists).  This makes M-x dired
                        ;; RET RET go to the directory of current
                        ;; file, which is non-Icomplete vanilla Emacs
                        ;; and `ido-mode' both do.
                        `(,(lambda (comp)
                             (string= "./" comp)))))
       ;; After we have setup the predicates, look for a completion
       ;; matching one of them and bubble up it, destructively on
       ;; `completion-all-sorted-completions' (unless that completion
       ;; happens to be already on top).
       thereis (or
                (and (funcall fn (car all)) all)
                (cl-loop
                 for l on all
                 while (consp (cdr l))
                 for comp = (cadr l)
                 when (funcall fn comp)
                 do (setf (cdr l) (cddr l))
                 and return
                 (completion--cache-all-sorted-completions beg end (cons comp all))))
       finally return all)))

(defvar icomplete-vertical-mode-minibuffer-map
  (let ((map (make-sparse-keymap)))
    (define-key map (kbd "C-n") 'icomplete-forward-completions)
    (define-key map (kbd "C-p") 'icomplete-backward-completions)
    (define-key map (kbd "<down>") 'icomplete-forward-completions)
    (define-key map (kbd "<up>") 'icomplete-backward-completions)
    (define-key map (kbd "M-<") 'icomplete-vertical-goto-first)
    (define-key map (kbd "M->") 'icomplete-vertical-goto-last)
    map)
  "Keymap used by `icomplete-vertical-mode' in the minibuffer.")

(defun icomplete--vertical-minibuffer-setup ()
  "Setup the minibuffer for vertical display of completion candidates."
  (use-local-map (make-composed-keymap icomplete-vertical-mode-minibuffer-map
                                       (current-local-map)))
  (setq-local icomplete-hide-common-prefix nil
              ;; Ask `icomplete-completions' to return enough completions candidates.
              icomplete-prospects-height 25
              redisplay-adhoc-scroll-in-resize-mini-windows nil))

;;;###autoload
(define-minor-mode icomplete-vertical-mode
  "Toggle vertical candidate display in `icomplete-mode' or `fido-mode'.

If none of these modes are on, turn on `icomplete-mode'.

As many completion candidates as possible are displayed, depending on
the value of `max-mini-window-height', and the way the mini-window is
resized depends on `resize-mini-windows'."
  :global t
  (remove-hook 'icomplete-minibuffer-setup-hook
               #'icomplete--vertical-minibuffer-setup)
  (when icomplete-vertical-mode
    (unless icomplete-mode
      (icomplete-mode 1))
    (add-hook 'icomplete-minibuffer-setup-hook
              #'icomplete--vertical-minibuffer-setup)))

;;;###autoload
(define-minor-mode fido-vertical-mode
  "Toggle vertical candidate display in `fido-mode'.
When turning on, if non-vertical `fido-mode' is off, turn it on.
If it's on, just add the vertical display."
  :global t
  (icomplete-vertical-mode -1)
  (when fido-vertical-mode
    (unless fido-mode (fido-mode 1))
    (icomplete-vertical-mode 1)))

\f


;;;_* Completion

;;;_ > icomplete-exhibit ()
(defun icomplete-exhibit ()
  "Insert Icomplete completions display.
Should be run via minibuffer `post-command-hook'.
See `icomplete-mode' and `minibuffer-setup-hook'."
  (when (and icomplete-mode
             (icomplete-simple-completing-p)) ;Shouldn't be necessary.
    (let ((saved-point (point)))
      (save-excursion
        (goto-char (point-max))
                                        ; Insert the match-status information:
        (when (and (or icomplete-show-matches-on-no-input
                       (not (equal (icomplete--field-string)
                                   icomplete--initial-input)))
                   (or
                    ;; Don't bother with delay after certain number of chars:
                    (> (- (point) (icomplete--field-beg))
                       icomplete-max-delay-chars)
                    ;; Don't delay if the completions are known.
                    completion-all-sorted-completions
                    ;; Don't delay if alternatives number is small enough:
                    (and (sequencep (icomplete--completion-table))
                         (< (length (icomplete--completion-table))
                            icomplete-delay-completions-threshold))
                    ;; Delay - give some grace time for next keystroke, before
                    ;; embarking on computing completions:
                    (sit-for icomplete-compute-delay)))
          (when (and
                 icomplete-tidy-shadowed-file-names
                 (eq (icomplete--category) 'file)
                 rfn-eshadow-overlay (overlay-buffer rfn-eshadow-overlay)
                 (eq this-command 'self-insert-command)
                 (= saved-point (icomplete--field-end))
                 (or (>= (- (point) (overlay-end rfn-eshadow-overlay)) 2)
                     (eq ?/ (char-before (- (point) 2)))))
            (delete-region (overlay-start rfn-eshadow-overlay)
                           (overlay-end rfn-eshadow-overlay)))
          (let* ((field-string (icomplete--field-string))
                 (text (while-no-input
                         (icomplete-completions
                          field-string
                          (icomplete--completion-table)
                          (icomplete--completion-predicate)
                          (if (window-minibuffer-p)
                              (eq minibuffer--require-match t)))))
                 (buffer-undo-list t)
                 deactivate-mark)
            ;; Do nothing if while-no-input was aborted.
            (when (stringp text)
              (move-overlay icomplete-overlay (point-min) (point) (current-buffer))
              ;; The current C cursor code doesn't know to use the overlay's
              ;; marker's stickiness to figure out whether to place the cursor
              ;; before or after the string, so let's spoon-feed it the pos.
              (put-text-property 0 1 'cursor t text)
              (overlay-put
               icomplete-overlay 'before-string
               (and icomplete-scroll
                    icomplete-matches-format
                    (let* ((past (length icomplete--scrolled-past))
                           (current (1+ past))
                           (total (+ past (safe-length
                                           completion-all-sorted-completions))))
                      (format icomplete-matches-format current total))))
              (overlay-put icomplete-overlay 'after-string text))))))))

(defun icomplete--augment (md prospects)
  "Augment completion strings in PROSPECTS with completion metadata MD.
Return a list of strings (COMP PREFIX SUFFIX SECTION).  PREFIX
and SUFFIX, if non-nil, are obtained from `affixation-function' or
`annotation-function' metadata.  SECTION is obtained from
`group-function'.  Consecutive `equal' sections are avoided.
COMP is the element in PROSPECTS or a transformation also given
by `group-function''s second \"transformation\" protocol."
  (let* ((aff-fun (or (completion-metadata-get md 'affixation-function)
                      (plist-get completion-extra-properties :affixation-function)))
         (ann-fun (or (completion-metadata-get md 'annotation-function)
                      (plist-get completion-extra-properties :annotation-function)))
         (grp-fun (and completions-group
                       (completion-metadata-get md 'group-function)))
         (annotated
          (cond (aff-fun
           (funcall aff-fun prospects))
          (ann-fun
           (mapcar
            (lambda (comp)
              (let ((suffix (or (funcall ann-fun comp) "")))
                (list comp ""
                      ;; The default completion UI adds the
                      ;; `completions-annotations' face if no
                      ;; other faces are present.
                      (if (text-property-not-all 0 (length suffix) 'face nil suffix)
                          suffix
                        (propertize suffix 'face 'completions-annotations)))))
            prospects))
          (t (mapcar #'list prospects)))))
    (if grp-fun
        (cl-loop with section = nil
                 for (c prefix suffix) in annotated
                 for selectedp = (get-text-property 0 'icomplete-selected c)
                 for tr = (propertize (or (funcall grp-fun c t) c)
                                      'icomplete-selected selectedp)
                 if (not (equal section (setq section (funcall grp-fun c nil))))
                 collect (list tr prefix suffix section)
                 else collect (list tr prefix suffix ))
      annotated)))

(cl-defun icomplete--render-vertical
    (comps md &aux scroll-above scroll-below
           (total-space ; number of mini-window lines available
            (1- (min
                 icomplete-prospects-height
                 (truncate (max-mini-window-lines) 1)))))
  ;; Welcome to loopapalooza!
  ;;
  ;; First, be mindful of `icomplete-scroll' and manual scrolls.  If
  ;; `icomplete--scrolled-completions' and `icomplete--scrolled-past'
  ;; are:
  ;;
  ;; - both nil, there is no manual scroll;
  ;; - both non-nil, there is a healthy manual scroll that doesn't need
  ;;   to be readjusted (user just moved around the minibuffer, for
  ;;   example)l
  ;; - non-nil and nil, respectively, a refiltering took place and we
  ;;   may need to readjust them to the new filtered `comps'.
  (when (and icomplete-scroll
             icomplete--scrolled-completions
             (null icomplete--scrolled-past))
    (cl-loop with preds
             for (comp . rest) on comps
             when (equal comp (car icomplete--scrolled-completions))
             do
             (setq icomplete--scrolled-past preds
                   comps (cons comp rest))
             (completion--cache-all-sorted-completions
              (icomplete--field-beg)
              (icomplete--field-end)
              comps)
             and return nil
             do (push comp preds)
             finally (setq icomplete--scrolled-completions nil)))
  ;; Then, in this pretty ugly loop, collect completions to display
  ;; above and below the selected one, considering scrolling
  ;; positions.
  (cl-loop with preds = icomplete--scrolled-past
           with succs = (cdr comps)
           with space-above = (- total-space
                                 1
                                 (cl-loop for (_ . r) on comps
                                          repeat (truncate total-space 2)
                                          while (listp r)
                                          count 1))
           repeat total-space
           for neighbour = nil
           if (and preds (> space-above 0)) do
           (push (setq neighbour (pop preds)) scroll-above)
           (cl-decf space-above)
           else if (consp succs) collect
           (setq neighbour (pop succs)) into scroll-below-aux
           while neighbour
           finally (setq scroll-below scroll-below-aux))
  ;; Halfway there...
  (let* ((selected (propertize (car comps) 'icomplete-selected t))
         (chosen (append scroll-above (list selected) scroll-below))
         (tuples (icomplete--augment md chosen))
         max-prefix-len max-comp-len lines nsections)
    (add-face-text-property 0 (length selected)
                            'icomplete-selected-match 'append selected)
    ;; Figure out parameters for horizontal spacing
    (cl-loop
     for (comp prefix) in tuples
     maximizing (length prefix) into max-prefix-len-aux
     maximizing (length comp) into max-comp-len-aux
     finally (setq max-prefix-len max-prefix-len-aux
                   max-comp-len max-comp-len-aux))
    ;; Serialize completions and section titles into a list
    ;; of lines to render
    (cl-loop
     for (comp prefix suffix section) in tuples
     when section
     collect (propertize section 'face 'icomplete-section) into lines-aux
     and count 1 into nsections-aux
     when (get-text-property 0 'icomplete-selected comp)
     do (add-face-text-property 0 (length comp)
                                'icomplete-selected-match 'append comp)
     collect (concat prefix
                     (make-string (- max-prefix-len (length prefix)) ? )
                     comp
                     (make-string (- max-comp-len (length comp)) ? )
                     suffix)
     into lines-aux
     finally (setq lines lines-aux
                   nsections nsections-aux))
    ;; Kick out some lines from the beginning due to extra sections.
    ;; This hopes to keep the selected entry more or less in the
    ;; middle of the dropdown-like widget when `icomplete-scroll' is
    ;; t.  Funky, but at least I didn't use `cl-loop'
    (setq lines
          (nthcdr
           (cond ((<= (length lines) total-space) 0)
                 ((> (length scroll-above) (length scroll-below)) nsections)
                 (t (min (ceiling nsections 2) (length scroll-above))))
           lines))
    ;; At long last, render final string return value.  This may still
    ;; kick out lines at the end.
    (concat " \n"
            (cl-loop for l in lines repeat total-space concat l concat "\n"))))

;;;_ > icomplete-completions (name candidates predicate require-match)
(defun icomplete-completions (name candidates predicate require-match)
  "Identify prospective candidates for minibuffer completion.

The display is updated with each minibuffer keystroke during
minibuffer completion.

Prospective completion suffixes (if any) are displayed, bracketed by
one of (), [], or {} pairs.  The choice of brackets is as follows:

  (...) - a single prospect is identified and matching is enforced,
  [...] - a single prospect is identified but matching is optional, or
  {...} - multiple prospects, separated by commas, are indicated, and
          further input is required to distinguish a single one.

If there are multiple possibilities, `icomplete-separator' separates them.

The displays for unambiguous matches have ` [Matched]' appended
\(whether complete or not), or ` [No matches]', if no eligible
matches exist."
  (let* ((ignored-extension-re
          (and minibuffer-completing-file-name
               icomplete-with-completion-tables
               completion-ignored-extensions
               (concat "\\(?:\\`\\.\\./\\|"
                       (regexp-opt completion-ignored-extensions)
                       "\\)\\'")))
         (minibuffer-completion-table candidates)
	 (minibuffer-completion-predicate
          (if ignored-extension-re
              (lambda (cand)
                (and (not (string-match ignored-extension-re cand))
                     (or (null predicate)
                         (funcall predicate cand))))
            predicate))
	 (md (completion--field-metadata (icomplete--field-beg)))
	 (comps (icomplete--sorted-completions))
         (open-bracket (if require-match "(" "["))
         (close-bracket (if require-match ")" "]")))
    ;; `concat'/`mapconcat' is the slow part.
    (if (not (consp comps))
	(progn ;;(debug (format "Candidates=%S field=%S" candidates name))
	  (format " %sNo matches%s" open-bracket close-bracket))
      (if icomplete-vertical-mode
	  (icomplete--render-vertical comps md)
        (let* ((last (if (consp comps) (last comps)))
               ;; Save the "base size" encoded in `comps' then
               ;; removing making `comps' a proper list.
               (base-size (prog1 (cdr last)
                            (if last (setcdr last nil))))
               (most-try
                ;; icomplete-hide-common-prefix logic is used
                ;; unconditionally when there is single match.
                (when (or icomplete-hide-common-prefix (not (cdr comps)))
                  (if (and base-size (> base-size 0))
                      (completion-try-completion
                       name candidates predicate (length name) md)
                    ;; If the `comps' are 0-based, the result should be
                    ;; the same with `comps'.
                    (completion-try-completion
                     name comps nil (length name) md))))
               (most (if (consp most-try) (car most-try)
                       (if most-try (car comps) "")))
               ;; Compare name and most, so we can determine if name is
               ;; a prefix of most, or something else.
               (compare (compare-strings name nil nil
                                         most nil nil completion-ignore-case))
               (ellipsis (if (char-displayable-p ?…) "…" "..."))
               (determ (unless (or (eq t compare) (eq t most-try)
                                   (= (setq compare (1- (abs compare)))
                                      (length most)))
                         (concat open-bracket
                                 (cond
                                  ((= compare (length name))
                                   ;; Typical case: name is a prefix.
                                   (substring most compare))
                                  ;; Don't bother truncating if it doesn't gain
                                  ;; us at least 2 columns.
                                  ((< compare (+ 2 (string-width ellipsis))) most)
                                  (t (concat ellipsis (substring most compare))))
                                 close-bracket)))
               ;;"-prospects" - more than one candidate
               (prospects-len (+ (string-width
                                  (or determ (concat open-bracket close-bracket)))
                                 (string-width icomplete-separator)
                                 (+ 2 (string-width ellipsis)) ;; take {…} into account
                                 (string-width (buffer-string))))
               (prospects-max
                ;; Max total length to use, including the minibuffer content.
                (* (+ icomplete-prospects-height
                      ;; If the minibuffer content already uses up more than
                      ;; one line, increase the allowable space accordingly.
                      (/ prospects-len (window-width)))
                   (window-width)))
               ;; Find the common prefix among `comps'.
               ;; We can't use the optimization below because its assumptions
               ;; aren't always true, e.g. when completion-cycling (bug#10850):
               ;; (if (eq t (compare-strings (car comps) nil (length most)
               ;;                        most nil nil completion-ignore-case))
               ;;     ;; Common case.
               ;;     (length most)
               ;; Else, use try-completion.
               (prefix (when icomplete-hide-common-prefix
                         (try-completion "" comps)))
               (prefix-len
                (and (stringp prefix)
                     ;; Only hide the prefix if the corresponding info
                     ;; is already displayed via `most'.
                     (string-prefix-p prefix most t)
                     (length prefix))) ;;)
               prospects comp limit)
          (prog1
              (if (or (eq most-try t) (and (not icomplete-scroll)
                                           (not (consp (cdr comps)))))
                  (concat determ " [Matched]")
                (when (member name comps)
                  ;; NAME is complete but not unique.  This scenario poses
                  ;; following UI issues:
                  ;;
                  ;; - When `icomplete-hide-common-prefix' is non-nil, NAME
                  ;;   is stripped empty.  This would make the entry
                  ;;   inconspicuous.
                  ;;
                  ;; - Due to sorting of completions, NAME may not be the
                  ;;   first of the prospects and could be hidden deep in
                  ;;   the displayed string.
                  ;;
                  ;; - Because of `icomplete-prospects-height' , NAME may
                  ;;   not even be displayed to the user.
                  ;;
                  ;; To circumvent all the above problems, provide a visual
                  ;; cue to the user via an "empty string" in the try
                  ;; completion field.
                  (setq determ (concat open-bracket "" close-bracket)))
                (while (and comps (not limit))
                  (setq comp
                        (if prefix-len (substring (car comps) prefix-len) (car comps))
                        comps (cdr comps))
                  (setq prospects-len
                        (+ (string-width comp)
                           (string-width icomplete-separator)
                           prospects-len))
                  (if (< prospects-len prospects-max)
                      (push comp prospects)
                    (setq limit t)))
                (setq prospects (nreverse prospects))
                ;; Decorate first of the prospects.
                (when prospects
                  (let ((first (copy-sequence (pop prospects))))
                    (put-text-property 0 (length first)
                                       'face 'icomplete-first-match first)
                    (push first prospects)))
                (concat determ
                        "{"
                        (mapconcat 'identity prospects icomplete-separator)
                        (concat (and limit (concat icomplete-separator ellipsis))
                                "}")))
            ;; Restore the base-size info, since completion-all-sorted-completions
            ;; is cached.
            (if last (setcdr last base-size))))))))

;;;_* Iswitchb compatibility

;; We moved Iswitchb to `obsolete' in 24.4, but autoloads in files in
;; `obsolete' aren't obeyed (since that would encourage people to keep using
;; those packages, oblivious to their obsolescence).  Given the fact that
;; Iswitchb was very popular, we decided to keep its autoload for a bit longer,
;; so we moved it here.

;;;###autoload(when (locate-library "obsolete/iswitchb")
;;;###autoload  (autoload 'iswitchb-mode "iswitchb" "Toggle Iswitchb mode." t)
;;;###autoload  (make-obsolete 'iswitchb-mode
;;;###autoload    "use `icomplete-mode' or `ido-mode' instead." "24.4"))

(defgroup zcomplete nil
  "Show completions dynamically in *Completions* window from minibuffer."
  :prefix "zcomplete-"
  :link '(info-link "(emacs)Zcomplete")
  :group 'minibuffer)

(defcustom zcomplete-show-matches-on-no-input nil
  "When non-nil, show completions when first prompting for input.
This means to show completions even when the current minibuffer contents
is the same as was the initial input after minibuffer activation.
This also means that if you traverse the list of completions with
commands and just hit RET without typing any characters,
the match under point will be chosen instead of the default."
  :type 'boolean)

(defcustom zcomplete-with-completion-tables t
  "Specialized completion tables with which Zcomplete should operate.
If this is t, Zcomplete operates on all tables.
Otherwise this should be a list of the completion tables (e.g.,
`internal-complete-buffer') on which Zcomplete should operate."
  :type '(choice (const :tag "All" t)
		 (repeat function)))

(defcustom zcomplete-compute-delay .15
  "Completions-computation stall, used only with large-number completions.
See `zcomplete-delay-completions-threshold'."
  :type 'number)

(defcustom zcomplete-delay-completions-threshold 400
  "Pending-completions number over which to apply `zcomplete-compute-delay'."
  :type 'integer)

(defcustom zcomplete-max-delay-chars 2
  "Maximum number of initial chars to apply `zcomplete-compute-delay'."
  :type 'integer)

(defcustom zcomplete-minibuffer-setup-hook nil
  "Zcomplete-specific customization of minibuffer setup.
This hook is run during minibuffer setup if Zcomplete is active."
  :type 'hook)

\f
(defvar zcomplete--initial-input nil
  "Initial input in the minibuffer when `zcomplete-mode' was activated.
Used to implement the option `zcomplete-show-matches-on-no-input'.")

(defun zcomplete-post-command-hook (_ _ _)
  (let ((non-essential t)) ;E.g. don't prompt for password!
    (zcomplete-exhibit)))

(defvar-keymap zcomplete-minibuffer-map
  :doc "Keymap used by `zcomplete-mode' in the minibuffer."
  "<remap> <minibuffer-complete-and-exit>" #'zcomplete-ret
  "<left>"  #'minibuffer-previous-completion
  "<right>" #'minibuffer-next-completion
  "<up>"    #'zcomplete-previous-line-completion
  "<down>"  #'zcomplete-next-line-completion)

(defun zcomplete-ret ()
  "Exit minibuffer for zcomplete."
  (interactive)
  (remove-hook 'after-change-functions #'zcomplete-post-command-hook t)
  (if (get-buffer-window "*Completions*" 0)
      (minibuffer-choose-completion)
    (minibuffer-complete-and-exit)))

(defun zcomplete-previous-line-completion (&optional n)
  "Run `previous-line' from the minibuffer in its completions window."
  (interactive "p")
  (with-minibuffer-completions-window
    (when completions-highlight-face
      (setq-local cursor-face-highlight-nonselected-window t))
    (previous-line n)))

(defun zcomplete-next-line-completion (&optional n)
  "Run `next-line' from the minibuffer in its completions window."
  (interactive "p")
  (with-minibuffer-completions-window
    (when completions-highlight-face
      (setq-local cursor-face-highlight-nonselected-window t))
    (next-line n)))

\f
;;;###autoload
(define-minor-mode zcomplete-mode
  "Toggle incremental minibuffer completion (Zcomplete mode).

When this global minor mode is enabled, typing in the minibuffer
continuously displays a list of possible completions that match
the string you have typed.  The list of completions is displayed
in the *Completions* window.

For more information, see Info node `(emacs)Zcomplete'.
For options you can set, `\\[customize-group] zcomplete'.

You can use the following key bindings to navigate and select
completions:

\\{zcomplete-minibuffer-map}"
  :global t :group 'zcomplete
  (remove-hook 'minibuffer-setup-hook #'zcomplete-minibuffer-setup)
  (when zcomplete-mode
    (add-hook 'minibuffer-setup-hook #'zcomplete-minibuffer-setup)))

(defun zcomplete--completion-table ()
  (if (window-minibuffer-p) minibuffer-completion-table
    (or (nth 2 completion-in-region--data)
	(message "In %S (w=%S): %S"
		 (current-buffer) (selected-window) (window-minibuffer-p)))))
(defun zcomplete--field-string ()
  (if (window-minibuffer-p)
      (minibuffer-contents)
    (buffer-substring-no-properties
     (nth 0 completion-in-region--data)
     (nth 1 completion-in-region--data))))
(defun zcomplete--field-beg ()
  (if (window-minibuffer-p) (minibuffer-prompt-end)
    (nth 0 completion-in-region--data)))
(defun zcomplete--field-end ()
  (if (window-minibuffer-p) (point-max)
    (nth 1 completion-in-region--data)))

(defun zcomplete-simple-completing-p ()
  "Non-nil if current window is a minibuffer that's doing simple completion."
  (unless executing-kbd-macro
    (let ((table (zcomplete--completion-table)))
      (and table
           (or (not (functionp table))
               (eq zcomplete-with-completion-tables t)
               (member table zcomplete-with-completion-tables))))))

(defun zcomplete-minibuffer-setup ()
  "Run in minibuffer on activation to establish incremental completion.
Usually run by inclusion in `minibuffer-setup-hook'."
  (when zcomplete-mode
    (setq-local zcomplete--initial-input (zcomplete--field-string))
    (use-local-map (make-composed-keymap zcomplete-minibuffer-map
    					 (current-local-map)))
    (add-hook 'after-change-functions #'zcomplete-post-command-hook nil t)
    (run-hooks 'zcomplete-minibuffer-setup-hook)))

(defun zcomplete-exhibit ()
  "Update Zcomplete completions display.
Should be run via minibuffer `post-command-hook'.
See `zcomplete-mode' and `minibuffer-setup-hook'."
  (when (and zcomplete-mode
             (zcomplete-simple-completing-p)) ;Shouldn't be necessary.
    (when (and (or zcomplete-show-matches-on-no-input
                   (not (equal (zcomplete--field-string)
                               zcomplete--initial-input)))
               (or
                ;; Don't bother with delay after certain number of chars:
                (> (- (point) (zcomplete--field-beg))
                   zcomplete-max-delay-chars)
                ;; Don't delay if the completions are known.
                completion-all-sorted-completions
                ;; Don't delay if alternatives number is small enough:
                (and (sequencep (zcomplete--completion-table))
                     (< (length (zcomplete--completion-table))
                        zcomplete-delay-completions-threshold))
                ;; Delay - give some grace time for next keystroke, before
                ;; embarking on computing completions:
                (sit-for zcomplete-compute-delay)))
      (save-excursion
        (minibuffer-completion-help)
        (minibuffer-next-completion)))))

(provide 'icomplete)

;;;_* Local emacs vars.
;;Local variables:
;;allout-layout: (-2 :)
;;End:

;;; icomplete.el ends here

debug log:

solving 1e6b11bbd1 ...
found 1e6b11bbd1 in https://yhetil.org/emacs-devel/86sfqm14g6.fsf@mail.linkov.net/
found 2986aa192c in https://git.savannah.gnu.org/cgit/emacs.git
preparing index
index prepared:
100644 2986aa192c87254c1126e01db04e82ac1c222675	lisp/icomplete.el

applying [1/1] https://yhetil.org/emacs-devel/86sfqm14g6.fsf@mail.linkov.net/
diff --git a/lisp/icomplete.el b/lisp/icomplete.el
index 2986aa192c..1e6b11bbd1 100644

1:146: space before tab in indent.
    					 (current-local-map)))
Checking patch lisp/icomplete.el...
Applied patch lisp/icomplete.el cleanly.
warning: 1 line adds whitespace errors.

index at:
100644 9431ffccb79da56ec1ed8c54bd4de8c28e4e2fed	lisp/icomplete.el

(*) Git path names are given by the tree(s) the blob belongs to.
    Blobs themselves have no identifier aside from the hash of its contents.^

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).