emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob a02f713ca68bad2015a2aac1006cdd382e455a9e 44334 bytes (raw)
name: lisp/org-macs.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
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
 
;;; org-macs.el --- Top-level Definitions for Org -*- lexical-binding: t; -*-

;; Copyright (C) 2004-2020 Free Software Foundation, Inc.

;; Author: Carsten Dominik <carsten at orgmode dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: https://orgmode.org
;;
;; 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:

;; This file contains macro definitions, defsubst definitions, other
;; stuff needed for compilation and top-level forms in Org mode, as
;; well lots of small functions that are not Org mode specific but
;; simply generally useful stuff.

;;; Code:

(require 'cl-lib)
(require 'format-spec)

(declare-function org-string-collate-lessp "org-compat" (s1 s2 &optional locale ignore-case))

(defvar org-ts-regexp0)

\f
;;; Macros

(defmacro org-with-gensyms (symbols &rest body)
  (declare (debug (sexp body)) (indent 1))
  `(let ,(mapcar (lambda (s)
		   `(,s (make-symbol (concat "--" (symbol-name ',s)))))
                 symbols)
     ,@body))

;; Use `with-silent-modifications' to ignore cosmetic changes and
;; `org-unmodified' to ignore real text modifications.
(defmacro org-unmodified (&rest body)
  "Run BODY while preserving the buffer's `buffer-modified-p' state."
  (declare (debug (body)))
  (org-with-gensyms (was-modified)
    `(let ((,was-modified (buffer-modified-p)))
       (unwind-protect
           (let ((buffer-undo-list t)
		 (inhibit-modification-hooks t))
	     ,@body)
	 (set-buffer-modified-p ,was-modified)))))

(defmacro org-without-partial-completion (&rest body)
  (declare (debug (body)))
  `(if (and (boundp 'partial-completion-mode)
	    partial-completion-mode
	    (fboundp 'partial-completion-mode))
       (unwind-protect
	   (progn
	     (partial-completion-mode -1)
	     ,@body)
	 (partial-completion-mode 1))
     ,@body))

(defmacro org-with-point-at (pom &rest body)
  "Move to buffer and point of point-or-marker POM for the duration of BODY."
  (declare (debug (form body)) (indent 1))
  (org-with-gensyms (mpom)
    `(let ((,mpom ,pom))
       (save-excursion
	 (when (markerp ,mpom) (set-buffer (marker-buffer ,mpom)))
	 (org-with-wide-buffer
	  (goto-char (or ,mpom (point)))
	  ,@body)))))

(defmacro org-with-remote-undo (buffer &rest body)
  "Execute BODY while recording undo information in two buffers."
  (declare (debug (form body)) (indent 1))
  (org-with-gensyms (cline cmd buf1 buf2 undo1 undo2 c1 c2)
    `(let ((,cline (org-current-line))
	   (,cmd this-command)
	   (,buf1 (current-buffer))
	   (,buf2 ,buffer)
	   (,undo1 buffer-undo-list)
	   (,undo2 (with-current-buffer ,buffer buffer-undo-list))
	   ,c1 ,c2)
       ,@body
       (when org-agenda-allow-remote-undo
	 (setq ,c1 (org-verify-change-for-undo
		    ,undo1 (with-current-buffer ,buf1 buffer-undo-list))
	       ,c2 (org-verify-change-for-undo
		    ,undo2 (with-current-buffer ,buf2 buffer-undo-list)))
	 (when (or ,c1 ,c2)
	   ;; make sure there are undo boundaries
	   (and ,c1 (with-current-buffer ,buf1 (undo-boundary)))
	   (and ,c2 (with-current-buffer ,buf2 (undo-boundary)))
	   ;; remember which buffer to undo
	   (push (list ,cmd ,cline ,buf1 ,c1 ,buf2 ,c2)
		 org-agenda-undo-list))))))

(defmacro org-no-read-only (&rest body)
  "Inhibit read-only for BODY."
  (declare (debug (body)))
  `(let ((inhibit-read-only t)) ,@body))

(defmacro org-save-outline-visibility (use-markers &rest body)
  "Save and restore outline visibility around BODY.
If USE-MARKERS is non-nil, use markers for the positions.  This
means that the buffer may change while running BODY, but it also
means that the buffer should stay alive during the operation,
because otherwise all these markers will point to nowhere."
  (declare (debug (form body)) (indent 1))
  (org-with-gensyms (data invisible-types markers?)
    `(let* ((,invisible-types '(org-hide-block org-hide-drawer outline))
	    (,markers? ,use-markers)
	    (,data
	     (mapcar (lambda (o)
		       (let ((beg (overlay-start o))
			     (end (overlay-end o))
			     (type (overlay-get o 'invisible)))
			 (and beg end
			      (> end beg)
			      (memq type ,invisible-types)
			      (list (if ,markers? (copy-marker beg) beg)
				    (if ,markers? (copy-marker end t) end)
				    type))))
		     (org-with-wide-buffer
		      (overlays-in (point-min) (point-max))))))
       (unwind-protect (progn ,@body)
	 (org-with-wide-buffer
	  (dolist (type ,invisible-types)
	    (remove-overlays (point-min) (point-max) 'invisible type))
	  (pcase-dolist (`(,beg ,end ,type) (delq nil ,data))
	    (org-flag-region beg end t type)
	    (when ,markers?
	      (set-marker beg nil)
	      (set-marker end nil))))))))

(defmacro org-with-wide-buffer (&rest body)
  "Execute body while temporarily widening the buffer."
  (declare (debug (body)))
  `(save-excursion
     (save-restriction
       (widen)
       ,@body)))

(defmacro org-with-limited-levels (&rest body)
  "Execute BODY with limited number of outline levels."
  (declare (debug (body)))
  `(progn
     (defvar org-called-with-limited-levels)
     (defvar org-outline-regexp)
     (defvar outline-regexp)
     (defvar org-outline-regexp-bol)
     (let* ((org-called-with-limited-levels t)
            (org-outline-regexp (org-get-limited-outline-regexp))
            (outline-regexp org-outline-regexp)
            (org-outline-regexp-bol (concat "^" org-outline-regexp)))
       ,@body)))

(defmacro org-eval-in-environment (environment form)
  (declare (debug (form form)) (indent 1))
  `(eval (list 'let ,environment ',form)))

;;;###autoload
(defmacro org-load-noerror-mustsuffix (file)
  "Load FILE with optional arguments NOERROR and MUSTSUFFIX."
  `(load ,file 'noerror nil nil 'mustsuffix))

(defmacro org-preserve-local-variables (&rest body)
  "Execute BODY while preserving local variables."
  (declare (debug (body)))
  `(let ((local-variables
	  (org-with-wide-buffer
	   (goto-char (point-max))
	   (let ((case-fold-search t))
	     (and (re-search-backward "^[ \t]*# +Local Variables:"
				      (max (- (point) 3000) 1)
				      t)
		  (delete-and-extract-region (point) (point-max)))))))
     (unwind-protect (progn ,@body)
       (when local-variables
	 (org-with-wide-buffer
	  (goto-char (point-max))
	  ;; If last section is folded, make sure to also hide file
	  ;; local variables after inserting them back.
	  (let ((overlay
		 (cl-find-if (lambda (o)
			       (eq 'outline (overlay-get o 'invisible)))
			     (overlays-at (1- (point))))))
	    (unless (bolp) (insert "\n"))
	    (insert local-variables)
	    (when overlay
	      (move-overlay overlay (overlay-start overlay) (point-max)))))))))

(defmacro org-no-popups (&rest body)
  "Suppress popup windows and evaluate BODY."
  `(let (pop-up-frames display-buffer-alist)
     ,@body))

\f
;;; Buffer and windows

(defun org-base-buffer (buffer)
  "Return the base buffer of BUFFER, if it has one.  Else return the buffer."
  (when buffer
    (or (buffer-base-buffer buffer)
	buffer)))

(defun org-find-base-buffer-visiting (file)
  "Like `find-buffer-visiting' but always return the base buffer and
not an indirect buffer."
  (let ((buf (or (get-file-buffer file)
		 (find-buffer-visiting file))))
    (org-base-buffer buf)))

(defun org-switch-to-buffer-other-window (&rest args)
  "Switch to buffer in a second window on the current frame.
In particular, do not allow pop-up frames.
Returns the newly created buffer."
  (org-no-popups (apply #'switch-to-buffer-other-window args)))

(defun org-fit-window-to-buffer (&optional window max-height min-height
                                           shrink-only)
  "Fit WINDOW to the buffer, but only if it is not a side-by-side window.
WINDOW defaults to the selected window.  MAX-HEIGHT and MIN-HEIGHT are
passed through to `fit-window-to-buffer'.  If SHRINK-ONLY is set, call
`shrink-window-if-larger-than-buffer' instead, the height limit is
ignored in this case."
  (cond ((if (fboundp 'window-full-width-p)
             (not (window-full-width-p window))
           ;; Do nothing if another window would suffer.
           (> (frame-width) (window-width window))))
        ((and (fboundp 'fit-window-to-buffer) (not shrink-only))
         (fit-window-to-buffer window max-height min-height))
        ((fboundp 'shrink-window-if-larger-than-buffer)
         (shrink-window-if-larger-than-buffer window)))
  (or window (selected-window)))


\f
;;; File

(defun org-file-newer-than-p (file time)
  "Non-nil if FILE is newer than TIME.
FILE is a filename, as a string, TIME is a list of integers, as
returned by, e.g., `current-time'."
  (and (file-exists-p file)
       ;; Only compare times up to whole seconds as some file-systems
       ;; (e.g. HFS+) do not retain any finer granularity.  As
       ;; a consequence, make sure we return non-nil when the two
       ;; times are equal.
       (not (time-less-p (cl-subseq (nth 5 (file-attributes file)) 0 2)
			 (cl-subseq time 0 2)))))

(defun org-compile-file (source process ext &optional err-msg log-buf spec)
  "Compile a SOURCE file using PROCESS.

PROCESS is either a function or a list of shell commands, as
strings.  EXT is a file extension, without the leading dot, as
a string.  It is used to check if the process actually succeeded.

PROCESS must create a file with the same base name and directory
as SOURCE, but ending with EXT.  The function then returns its
filename.  Otherwise, it raises an error.  The error message can
then be refined by providing string ERR-MSG, which is appended to
the standard message.

If PROCESS is a function, it is called with a single argument:
the SOURCE file.

If it is a list of commands, each of them is called using
`shell-command'.  By default, in each command, %b, %f, %F, %o and
%O are replaced with, respectively, SOURCE base name, name, full
name, directory and absolute output file name.  It is possible,
however, to use more place-holders by specifying them in optional
argument SPEC, as an alist following the pattern

  (CHARACTER . REPLACEMENT-STRING).

When PROCESS is a list of commands, optional argument LOG-BUF can
be set to a buffer or a buffer name.  `shell-command' then uses
it for output."
  (let* ((base-name (file-name-base source))
	 (full-name (file-truename source))
	 (out-dir (or (file-name-directory source) "./"))
	 (output (expand-file-name (concat base-name "." ext) out-dir))
	 (time (current-time))
	 (err-msg (if (stringp err-msg) (concat ".  " err-msg) "")))
    (save-window-excursion
      (pcase process
	((pred functionp) (funcall process (shell-quote-argument source)))
	((pred consp)
	 (let ((log-buf (and log-buf (get-buffer-create log-buf)))
	       (spec (append spec
			     `((?b . ,(shell-quote-argument base-name))
			       (?f . ,(shell-quote-argument source))
			       (?F . ,(shell-quote-argument full-name))
			       (?o . ,(shell-quote-argument out-dir))
			       (?O . ,(shell-quote-argument output))))))
	   (dolist (command process)
	     (shell-command (format-spec command spec) log-buf))
	   (when log-buf (with-current-buffer log-buf (compilation-mode)))))
	(_ (error "No valid command to process %S%s" source err-msg))))
    ;; Check for process failure.  Output file is expected to be
    ;; located in the same directory as SOURCE.
    (unless (org-file-newer-than-p output time)
      (error (format "File %S wasn't produced%s" output err-msg)))
    output))


\f
;;; Indentation

(defun org-do-remove-indentation (&optional n)
  "Remove the maximum common indentation from the buffer.
When optional argument N is a positive integer, remove exactly
that much characters from indentation, if possible.  Return nil
if it fails."
  (catch :exit
    (goto-char (point-min))
    ;; Find maximum common indentation, if not specified.
    (let ((n (or n
		 (let ((min-ind (point-max)))
		   (save-excursion
		     (while (re-search-forward "^[ \t]*\\S-" nil t)
		       (let ((ind (current-indentation)))
			 (if (zerop ind) (throw :exit nil)
			   (setq min-ind (min min-ind ind))))))
		   min-ind))))
      (if (zerop n) (throw :exit nil)
	;; Remove exactly N indentation, but give up if not possible.
	(while (not (eobp))
	  (let ((ind (progn (skip-chars-forward " \t") (current-column))))
	    (cond ((eolp) (delete-region (line-beginning-position) (point)))
		  ((< ind n) (throw :exit nil))
		  (t (indent-line-to (- ind n))))
	    (forward-line)))
	;; Signal success.
	t))))


\f
;;; Input

(defun org-read-function (prompt &optional allow-empty?)
  "Prompt for a function.
If ALLOW-EMPTY? is non-nil, return nil rather than raising an
error when the user input is empty."
  (let ((func (completing-read prompt obarray #'fboundp t)))
    (cond ((not (string= func ""))
	   (intern func))
	  (allow-empty? nil)
	  (t (user-error "Empty input is not valid")))))

(defun org-completing-read (&rest args)
  "Completing-read with SPACE being a normal character."
  (let ((enable-recursive-minibuffers t)
	(minibuffer-local-completion-map
	 (copy-keymap minibuffer-local-completion-map)))
    (define-key minibuffer-local-completion-map " " 'self-insert-command)
    (define-key minibuffer-local-completion-map "?" 'self-insert-command)
    (define-key minibuffer-local-completion-map (kbd "C-c !")
      'org-time-stamp-inactive)
    (apply #'completing-read args)))

(defun org--mks-read-key (allowed-keys prompt)
  "Read a key and ensure it is a member of ALLOWED-KEYS.
TAB, SPC and RET are treated equivalently."
  (let* ((key (char-to-string
	       (pcase (read-char-exclusive prompt)
		 ((or ?\s ?\t ?\r) ?\t)
		 (char char)))))
    (if (member key allowed-keys)
        key
      (message "Invalid key: `%s'" key)
      (sit-for 1)
      (org--mks-read-key allowed-keys prompt))))

(defun org-mks (table title &optional prompt specials)
  "Select a member of an alist with multiple keys.

TABLE is the alist which should contain entries where the car is a string.
There should be two types of entries.

1. prefix descriptions like (\"a\" \"Description\")
   This indicates that `a' is a prefix key for multi-letter selection, and
   that there are entries following with keys like \"ab\", \"ax\"...

2. Select-able members must have more than two elements, with the first
   being the string of keys that lead to selecting it, and the second a
   short description string of the item.

The command will then make a temporary buffer listing all entries
that can be selected with a single key, and all the single key
prefixes.  When you press the key for a single-letter entry, it is selected.
When you press a prefix key, the commands (and maybe further prefixes)
under this key will be shown and offered for selection.

TITLE will be placed over the selection in the temporary buffer,
PROMPT will be used when prompting for a key.  SPECIALS is an
alist with (\"key\" \"description\") entries.  When one of these
is selected, only the bare key is returned."
  (save-window-excursion
    (let ((inhibit-quit t)
	  (buffer (org-switch-to-buffer-other-window "*Org Select*"))
	  (prompt (or prompt "Select: "))
	  case-fold-search
	  current)
      (unwind-protect
	  (catch 'exit
	    (while t
	      (erase-buffer)
	      (insert title "\n\n")
	      (let ((des-keys nil)
		    (allowed-keys '("\C-g"))
		    (tab-alternatives '("\s" "\t" "\r"))
		    (cursor-type nil))
		;; Populate allowed keys and descriptions keys
		;; available with CURRENT selector.
		(let ((re (format "\\`%s\\(.\\)\\'"
				  (if current (regexp-quote current) "")))
		      (prefix (if current (concat current " ") "")))
		  (dolist (entry table)
		    (pcase entry
		      ;; Description.
		      (`(,(and key (pred (string-match re))) ,desc)
		       (let ((k (match-string 1 key)))
			 (push k des-keys)
			 ;; Keys ending in tab, space or RET are equivalent.
			 (if (member k tab-alternatives)
			     (push "\t" allowed-keys)
			   (push k allowed-keys))
			 (insert prefix "[" k "]" "..." "  " desc "..." "\n")))
		      ;; Usable entry.
		      (`(,(and key (pred (string-match re))) ,desc . ,_)
		       (let ((k (match-string 1 key)))
			 (insert prefix "[" k "]" "     " desc "\n")
			 (push k allowed-keys)))
		      (_ nil))))
		;; Insert special entries, if any.
		(when specials
		  (insert "----------------------------------------------------\
---------------------------\n")
		  (pcase-dolist (`(,key ,description) specials)
		    (insert (format "[%s]     %s\n" key description))
		    (push key allowed-keys)))
		;; Display UI and let user select an entry or
		;; a sub-level prefix.
		(goto-char (point-min))
		(unless (pos-visible-in-window-p (point-max))
		  (org-fit-window-to-buffer))
		(let ((pressed (org--mks-read-key allowed-keys prompt)))
		  (setq current (concat current pressed))
		  (cond
		   ((equal pressed "\C-g") (user-error "Abort"))
		   ;; Selection is a prefix: open a new menu.
		   ((member pressed des-keys))
		   ;; Selection matches an association: return it.
		   ((let ((entry (assoc current table)))
		      (and entry (throw 'exit entry))))
		   ;; Selection matches a special entry: return the
		   ;; selection prefix.
		   ((assoc current specials) (throw 'exit current))
		   (t (error "No entry available")))))))
	(when buffer (kill-buffer buffer))))))

\f
;;; List manipulation

(defsubst org-get-alist-option (option key)
  (cond ((eq key t) t)
	((eq option t) t)
	((assoc key option) (cdr (assoc key option)))
	(t (let ((r (cdr (assq 'default option))))
	     (if (listp r) (delq nil r) r)))))

(defsubst org-last (list)
  "Return the last element of LIST."
  (car (last list)))

(defsubst org-uniquify (list)
  "Non-destructively remove duplicate elements from LIST."
  (let ((res (copy-sequence list))) (delete-dups res)))

(defun org-uniquify-alist (alist)
  "Merge elements of ALIST with the same key.

For example, in this alist:

\(org-uniquify-alist \\='((a 1) (b 2) (a 3)))
  => \\='((a 1 3) (b 2))

merge (a 1) and (a 3) into (a 1 3).

The function returns the new ALIST."
  (let (rtn)
    (dolist (e alist rtn)
      (let (n)
	(if (not (assoc (car e) rtn))
	    (push e rtn)
	  (setq n (cons (car e) (append (cdr (assoc (car e) rtn)) (cdr e))))
	  (setq rtn (assq-delete-all (car e) rtn))
	  (push n rtn))))))

(defun org-delete-all (elts list)
  "Remove all elements in ELTS from LIST.
Comparison is done with `equal'.  It is a destructive operation
that may remove elements by altering the list structure."
  (while elts
    (setq list (delete (pop elts) list)))
  list)

(defun org-plist-delete (plist property)
  "Delete PROPERTY from PLIST.
This is in contrast to merely setting it to 0."
  (let (p)
    (while plist
      (if (not (eq property (car plist)))
	  (setq p (plist-put p (car plist) (nth 1 plist))))
      (setq plist (cddr plist)))
    p))

(defun org-combine-plists (&rest plists)
  "Create a single property list from all plists in PLISTS.
The process starts by copying the first list, and then setting properties
from the other lists.  Settings in the last list are the most significant
ones and overrule settings in the other lists."
  (let ((rtn (copy-sequence (pop plists)))
	p v ls)
    (while plists
      (setq ls (pop plists))
      (while ls
	(setq p (pop ls) v (pop ls))
	(setq rtn (plist-put rtn p v))))
    rtn))


\f
;;; Local variables

(defconst org-unique-local-variables
  '(org-element--cache
    org-element--cache-objects
    org-element--cache-sync-keys
    org-element--cache-sync-requests
    org-element--cache-sync-timer)
  "List of local variables that cannot be transferred to another buffer.")

(defun org-get-local-variables ()
  "Return a list of all local variables in an Org mode buffer."
  (delq nil
	(mapcar
	 (lambda (x)
	   (let* ((binding (if (symbolp x) (list x) (list (car x) (cdr x))))
		  (name (car binding)))
	     (and (not (get name 'org-state))
		  (not (memq name org-unique-local-variables))
		  (string-match-p
		   "\\`\\(org-\\|orgtbl-\\|outline-\\|comment-\\|paragraph-\\|\
auto-fill\\|normal-auto-fill\\|fill-paragraph\\|indent-\\)"
		   (symbol-name name))
		  binding)))
	 (with-temp-buffer
	   (org-mode)
	   (buffer-local-variables)))))

(defun org-clone-local-variables (from-buffer &optional regexp)
  "Clone local variables from FROM-BUFFER.
Optional argument REGEXP selects variables to clone."
  (dolist (pair (buffer-local-variables from-buffer))
    (pcase pair
      (`(,name . ,value)		;ignore unbound variables
       (when (and (not (memq name org-unique-local-variables))
		  (or (null regexp) (string-match-p regexp (symbol-name name))))
	 (ignore-errors (set (make-local-variable name) value)))))))

\f
;;; Miscellaneous

(defsubst org-call-with-arg (command arg)
  "Call COMMAND interactively, but pretend prefix arg was ARG."
  (let ((current-prefix-arg arg)) (call-interactively command)))

(defsubst org-check-external-command (cmd &optional use no-error)
  "Check if external program CMD for USE exists, error if not.
When the program does exist, return its path.
When it does not exist and NO-ERROR is set, return nil.
Otherwise, throw an error.  The optional argument USE can describe what this
program is needed for, so that the error message can be more informative."
  (or (executable-find cmd)
      (if no-error
	  nil
	(error "Can't find `%s'%s" cmd
	       (if use (format " (%s)" use) "")))))

(defun org-display-warning (message)
  "Display the given MESSAGE as a warning."
  (display-warning 'org message :warning))

(defun org-unlogged-message (&rest args)
  "Display a message, but avoid logging it in the *Messages* buffer."
  (let ((message-log-max nil))
    (apply #'message args)))

(defun org-let (list &rest body)
  (eval (cons 'let (cons list body))))
(put 'org-let 'lisp-indent-function 1)

(defun org-let2 (list1 list2 &rest body)
  (eval (cons 'let (cons list1 (list (cons 'let (cons list2 body)))))))
(put 'org-let2 'lisp-indent-function 2)

(defun org-eval (form)
  "Eval FORM and return result."
  (condition-case error
      (eval form)
    (error (format "%%![Error: %s]" error))))

(defvar org-outline-regexp) ; defined in org.el
(defvar org-odd-levels-only) ; defined in org.el
(defvar org-inlinetask-min-level) ; defined in org-inlinetask.el
(defun org-get-limited-outline-regexp ()
  "Return outline-regexp with limited number of levels.
The number of levels is controlled by `org-inlinetask-min-level'."
  (cond ((not (derived-mode-p 'org-mode))
	 outline-regexp)
	((not (featurep 'org-inlinetask))
	 org-outline-regexp)
	(t
	 (let* ((limit-level (1- org-inlinetask-min-level))
		(nstars (if org-odd-levels-only
			    (1- (* limit-level 2))
			  limit-level)))
	   (format "\\*\\{1,%d\\} " nstars)))))

(defun org--line-empty-p (n)
  "Is the Nth next line empty?
Counts the current line as N = 1 and the previous line as N = 0;
see `beginning-of-line'."
  (and (not (bobp))
       (save-excursion
	 (beginning-of-line n)
	 (looking-at-p "[ \t]*$"))))

(defun org-previous-line-empty-p ()
  "Is the previous line a blank line?
When NEXT is non-nil, check the next line instead."
  (org--line-empty-p 0))

(defun org-next-line-empty-p ()
  "Is the previous line a blank line?
When NEXT is non-nil, check the next line instead."
  (org--line-empty-p 2))


\f
;;; Motion

(defsubst org-goto-line (N)
  (save-restriction
    (widen)
    (goto-char (point-min))
    (forward-line (1- N))))

(defsubst org-current-line (&optional pos)
  (save-excursion
    (and pos (goto-char pos))
    ;; works also in narrowed buffer, because we start at 1, not point-min
    (+ (if (bolp) 1 0) (count-lines 1 (point)))))


\f
;;; Overlays

(defun org-overlay-display (ovl text &optional face evap)
  "Make overlay OVL display TEXT with face FACE."
  (overlay-put ovl 'display text)
  (when face (overlay-put ovl 'face face))
  (when evap (overlay-put ovl 'evaporate t)))

(defun org-overlay-before-string (ovl text &optional face evap)
  "Make overlay OVL display TEXT with face FACE."
  (when face (org-add-props text nil 'face face))
  (overlay-put ovl 'before-string text)
  (when evap (overlay-put ovl 'evaporate t)))

(defun org-find-overlays (prop &optional pos delete)
  "Find all overlays specifying PROP at POS or point.
If DELETE is non-nil, delete all those overlays."
  (let (found)
    (dolist (ov (overlays-at (or pos (point))) found)
      (cond ((not (overlay-get ov prop)))
	    (delete (delete-overlay ov))
	    (t (push ov found))))))

(defun org-flag-region (from to flag spec)
  "Hide or show lines from FROM to TO, according to FLAG.
SPEC is the invisibility spec, as a symbol."
  (remove-overlays from to 'invisible spec)
  ;; Use `front-advance' since text right before to the beginning of
  ;; the overlay belongs to the visible line than to the contents.
  (when flag
    (let ((o (make-overlay from to nil 'front-advance)))
      (overlay-put o 'evaporate t)
      (overlay-put o 'invisible spec)
      (overlay-put o 'isearch-open-invisible #'delete-overlay))))


\f
;;; Regexp matching

(defsubst org-pos-in-match-range (pos n)
  (and (match-beginning n)
       (<= (match-beginning n) pos)
       (>= (match-end n) pos)))

(defun org-skip-whitespace ()
  "Skip over space, tabs and newline characters."
  (skip-chars-forward " \t\n\r"))

(defun org-match-line (regexp)
  "Match REGEXP at the beginning of the current line."
  (save-excursion
    (beginning-of-line)
    (looking-at regexp)))

(defun org-match-any-p (re list)
  "Non-nil if regexp RE matches an element in LIST."
  (cl-some (lambda (x) (string-match-p re x)) list))

(defun org-in-regexp (regexp &optional nlines visually)
  "Check if point is inside a match of REGEXP.

Normally only the current line is checked, but you can include
NLINES extra lines around point into the search.  If VISUALLY is
set, require that the cursor is not after the match but really
on, so that the block visually is on the match.

Return nil or a cons cell (BEG . END) where BEG and END are,
respectively, the positions at the beginning and the end of the
match."
  (catch :exit
    (let ((pos (point))
          (eol (line-end-position (if nlines (1+ nlines) 1))))
      (save-excursion
	(beginning-of-line (- 1 (or nlines 0)))
	(while (and (re-search-forward regexp eol t)
		    (<= (match-beginning 0) pos))
	  (let ((end (match-end 0)))
	    (when (or (> end pos) (and (= end pos) (not visually)))
	      (throw :exit (cons (match-beginning 0) (match-end 0))))))))))

(defun org-point-in-group (point group &optional context)
  "Check if POINT is in match-group GROUP.
If CONTEXT is non-nil, return a list with CONTEXT and the boundaries of the
match.  If the match group does not exist or point is not inside it,
return nil."
  (and (match-beginning group)
       (>= point (match-beginning group))
       (<= point (match-end group))
       (if context
	   (list context (match-beginning group) (match-end group))
	 t)))


\f
;;; String manipulation

(defun org-string< (a b)
  (org-string-collate-lessp a b))

(defun org-string<= (a b)
  (or (string= a b) (org-string-collate-lessp a b)))

(defun org-string>= (a b)
  (not (org-string-collate-lessp a b)))

(defun org-string> (a b)
  (and (not (string= a b))
       (not (org-string-collate-lessp a b))))

(defun org-string<> (a b)
  (not (string= a b)))

(defsubst org-trim (s &optional keep-lead)
  "Remove whitespace at the beginning and the end of string S.
When optional argument KEEP-LEAD is non-nil, removing blank lines
at the beginning of the string does not affect leading indentation."
  (replace-regexp-in-string
   (if keep-lead "\\`\\([ \t]*\n\\)+" "\\`[ \t\n\r]+") ""
   (replace-regexp-in-string "[ \t\n\r]+\\'" "" s)))

(defun org-string-nw-p (s)
  "Return S if S is a string containing a non-blank character.
Otherwise, return nil."
  (and (stringp s)
       (string-match-p "[^ \r\t\n]" s)
       s))

(defun org-reverse-string (string)
  "Return the reverse of STRING."
  (apply #'string (nreverse (string-to-list string))))

(defun org-split-string (string &optional separators)
  "Splits STRING into substrings at SEPARATORS.

SEPARATORS is a regular expression.  When nil, it defaults to
\"[ \f\t\n\r\v]+\".

Unlike `split-string', matching SEPARATORS at the beginning and
end of string are ignored."
  (let ((separators (or separators "[ \f\t\n\r\v]+")))
    (if (not (string-match separators string)) (list string)
      (let ((i (match-end 0))
	    (results
	     (and (/= 0 (match-beginning 0)) ;skip leading separator
		  (list (substring string 0 (match-beginning 0))))))
	(while (string-match separators string i)
	  (push (substring string i (match-beginning 0))
		results)
	  (setq i (match-end 0)))
	(nreverse (if (= i (length string))
		      results		;skip trailing separator
		    (cons (substring string i) results)))))))

(defun org--string-from-props (s property beg end)
  "Return the visible part of string S.
Visible part is determined according to text PROPERTY, which is
either `invisible' or `display'.  BEG and END are 0-indices
delimiting S."
  (let ((width 0)
	(cursor beg))
    (while (setq beg (text-property-not-all beg end property nil s))
      (let* ((next (next-single-property-change beg property s end))
	     (props (text-properties-at beg s))
	     (spec (plist-get props property))
	     (value
	      (pcase property
		(`invisible
		 ;; If `invisible' property in PROPS means text is to
		 ;; be invisible, return 0.  Otherwise return nil so
		 ;; as to resume search.
		 (and (or (eq t buffer-invisibility-spec)
			  (assoc-string spec buffer-invisibility-spec))
		      0))
		(`display
		 (pcase spec
		   (`nil nil)
		   (`(space . ,props)
		    (let ((width (plist-get props :width)))
		      (and (wholenump width) width)))
		   (`(image . ,_)
		    (ceiling (car (image-size spec))))
		   ((pred stringp)
		    ;; Displayed string could contain invisible parts,
		    ;; but no nested display.
		    (org--string-from-props spec 'invisible 0 (length spec)))
		   (_
		    ;; Un-handled `display' value.  Ignore it.
		    ;; Consider the original string instead.
		    nil)))
		(_ (error "Unknown property: %S" property)))))
	(when value
	  (cl-incf width
		   ;; When looking for `display' parts, we still need
		   ;; to look for `invisible' property elsewhere.
		   (+ (cond ((eq property 'display)
			     (org--string-from-props s 'invisible cursor beg))
			    ((= cursor beg) 0)
			    (t (string-width (substring s cursor beg))))
		      value))
	  (setq cursor next))
	(setq beg next)))
    (+ width
       ;; Look for `invisible' property in the last part of the
       ;; string.  See above.
       (cond ((eq property 'display)
	      (org--string-from-props s 'invisible cursor end))
	     ((= cursor end) 0)
	     (t (string-width (substring s cursor end)))))))

(defun org-string-width (string)
  "Return width of STRING when displayed in the current buffer.
Unlike `string-width', this function takes into consideration
`invisible' and `display' text properties.  It supports the
latter in a limited way, mostly for combinations used in Org.
Results may be off sometimes if it cannot handle a given
`display' value."
  (org--string-from-props string 'display 0 (length string)))

(defun org-not-nil (v)
  "If V not nil, and also not the string \"nil\", then return V.
Otherwise return nil."
  (and v (not (equal v "nil")) v))

(defun org-unbracket-string (pre post string)
  "Remove PRE/POST from the beginning/end of STRING.
Both PRE and POST must be pre-/suffixes of STRING, or neither is
removed.  Return the new string.  If STRING is nil, return nil."
  (declare (indent 2))
  (and string
       (if (and (string-prefix-p pre string)
		(string-suffix-p post string))
	   (substring string (length pre) (- (length post)))
	 string)))

(defun org-strip-quotes (string)
  "Strip double quotes from around STRING, if applicable.
If STRING is nil, return nil."
  (org-unbracket-string "\"" "\"" string))

(defsubst org-current-line-string (&optional to-here)
  "Return current line, as a string.
If optional argument TO-HERE is non-nil, return string from
beginning of line up to point."
  (buffer-substring (line-beginning-position)
		    (if to-here (point) (line-end-position))))

(defun org-shorten-string (s maxlength)
  "Shorten string S so that it is no longer than MAXLENGTH characters.
If the string is shorter or has length MAXLENGTH, just return the
original string.  If it is longer, the functions finds a space in the
string, breaks this string off at that locations and adds three dots
as ellipsis.  Including the ellipsis, the string will not be longer
than MAXLENGTH.  If finding a good breaking point in the string does
not work, the string is just chopped off in the middle of a word
if necessary."
  (if (<= (length s) maxlength)
      s
    (let* ((n (max (- maxlength 4) 1))
	   (re (concat "\\`\\(.\\{1," (number-to-string n)
		       "\\}[^ ]\\)\\([ ]\\|\\'\\)")))
      (if (string-match re s)
	  (concat (match-string 1 s) "...")
	(concat (substring s 0 (max (- maxlength 3) 0)) "...")))))

(defun org-remove-tabs (s &optional width)
  "Replace tabulators in S with spaces.
Assumes that s is a single line, starting in column 0."
  (setq width (or width tab-width))
  (while (string-match "\t" s)
    (setq s (replace-match
	     (make-string
	      (- (* width (/ (+ (match-beginning 0) width) width))
		 (match-beginning 0)) ?\ )
	     t t s)))
  s)

(defun org-wrap (string &optional width lines)
  "Wrap string to either a number of lines, or a width in characters.
If WIDTH is non-nil, the string is wrapped to that width, however many lines
that costs.  If there is a word longer than WIDTH, the text is actually
wrapped to the length of that word.
IF WIDTH is nil and LINES is non-nil, the string is forced into at most that
many lines, whatever width that takes.
The return value is a list of lines, without newlines at the end."
  (let* ((words (split-string string))
	 (maxword (apply 'max (mapcar 'org-string-width words)))
	 w ll)
    (cond (width
	   (org--do-wrap words (max maxword width)))
	  (lines
	   (setq w maxword)
	   (setq ll (org--do-wrap words maxword))
	   (if (<= (length ll) lines)
	       ll
	     (setq ll words)
	     (while (> (length ll) lines)
	       (setq w (1+ w))
	       (setq ll (org--do-wrap words w)))
	     ll))
	  (t (error "Cannot wrap this")))))

(defun org--do-wrap (words width)
  "Create lines of maximum width WIDTH (in characters) from word list WORDS."
  (let (lines line)
    (while words
      (setq line (pop words))
      (while (and words (< (+ (length line) (length (car words))) width))
	(setq line (concat line " " (pop words))))
      (setq lines (push line lines)))
    (nreverse lines)))

(defun org-remove-indentation (code &optional n)
  "Remove maximum common indentation in string CODE and return it.
N may optionally be the number of columns to remove.  Return CODE
as-is if removal failed."
  (with-temp-buffer
    (insert code)
    (if (org-do-remove-indentation n) (buffer-string) code)))

(defun org-fill-template (template alist)
  "Find each %key of ALIST in TEMPLATE and replace it."
  (let ((case-fold-search nil))
    (dolist (entry (sort (copy-sequence alist)
                         (lambda (a b) (< (length (car a)) (length (car b))))))
      (setq template
	    (replace-regexp-in-string
	     (concat "%" (regexp-quote (car entry)))
	     (or (cdr entry) "") template t t)))
    template))

(defun org-replace-escapes (string table)
  "Replace %-escapes in STRING with values in TABLE.
TABLE is an association list with keys like \"%a\" and string values.
The sequences in STRING may contain normal field width and padding information,
for example \"%-5s\".  Replacements happen in the sequence given by TABLE,
so values can contain further %-escapes if they are define later in TABLE."
  (let ((tbl (copy-alist table))
	(case-fold-search nil)
        (pchg 0)
        re rpl)
    (dolist (e tbl)
      (setq re (concat "%-?[0-9.]*" (substring (car e) 1)))
      (when (and (cdr e) (string-match re (cdr e)))
        (let ((sref (substring (cdr e) (match-beginning 0) (match-end 0)))
              (safe "SREF"))
          (add-text-properties 0 3 (list 'sref sref) safe)
          (setcdr e (replace-match safe t t (cdr e)))))
      (while (string-match re string)
        (setq rpl (format (concat (substring (match-string 0 string) 0 -1) "s")
                          (cdr e)))
        (setq string (replace-match rpl t t string))))
    (while (setq pchg (next-property-change pchg string))
      (let ((sref (get-text-property pchg 'sref string)))
	(when (and sref (string-match "SREF" string pchg))
	  (setq string (replace-match sref t t string)))))
    string))

\f
;;; Text properties

(defconst org-rm-props '(invisible t face t keymap t intangible t mouse-face t
				   rear-nonsticky t mouse-map t fontified t
				   org-emphasis t)
  "Properties to remove when a string without properties is wanted.")

(defsubst org-no-properties (s &optional restricted)
  "Remove all text properties from string S.
When RESTRICTED is non-nil, only remove the properties listed
in `org-rm-props'."
  (if restricted (remove-text-properties 0 (length s) org-rm-props s)
    (set-text-properties 0 (length s) nil s))
  s)
(defun org-add-props (string plist &rest props)
  "Add text properties to entire string, from beginning to end.
PLIST may be a list of properties, PROPS are individual properties and values
that will be added to PLIST.  Returns the string that was modified."
  (declare (indent 2))
  (add-text-properties
   0 (length string) (if props (append plist props) plist) string)
  string)

(defun org-make-parameter-alist (flat)
  "Return alist based on FLAT.
FLAT is a list with alternating symbol names and values.  The
returned alist is a list of lists with the symbol name in car and
the value in cdr."
  (when flat
    (cons (list (car flat) (cadr flat))
	  (org-make-parameter-alist (cddr flat)))))

(defsubst org-get-at-bol (property)
  "Get text property PROPERTY at the beginning of line."
  (get-text-property (point-at-bol) property))

(defun org-get-at-eol (property n)
  "Get text property PROPERTY at the end of line less N characters."
  (get-text-property (- (point-at-eol) n) property))

(defun org-find-text-property-in-string (prop s)
  "Return the first non-nil value of property PROP in string S."
  (or (get-text-property 0 prop s)
      (get-text-property (or (next-single-property-change 0 prop s) 0)
			 prop s)))

(defun org-invisible-p (&optional pos folding-only)
  "Non-nil if the character after POS is invisible.
If POS is nil, use `point' instead.  When optional argument
FOLDING-ONLY is non-nil, only consider invisible parts due to
folding of a headline, a block or a drawer, i.e., not because of
fontification."
  (let ((value (get-char-property (or pos (point)) 'invisible)))
    (cond ((not value) nil)
	  (folding-only (memq value '(org-hide-block org-hide-drawer outline)))
	  (t value))))

(defun org-truely-invisible-p ()
  "Check if point is at a character currently not visible.
This version does not only check the character property, but also
`visible-mode'."
  (unless (bound-and-true-p visible-mode)
    (org-invisible-p)))

(defun org-invisible-p2 ()
  "Check if point is at a character currently not visible.
If the point is at EOL (and not at the beginning of a buffer too),
move it back by one char before doing this check."
  (save-excursion
    (when (and (eolp) (not (bobp)))
      (backward-char 1))
    (org-invisible-p)))

(defun org-find-visible ()
  "Return closest visible buffer position, or `point-max'"
  (if (org-invisible-p)
      (next-single-char-property-change (point) 'invisible)
    (point)))

(defun org-find-invisible ()
  "Return closest invisible buffer position, or `point-max'"
  (if (org-invisible-p)
      (point)
    (next-single-char-property-change (point) 'invisible)))

\f
;;; Time

(defun org-2ft (s)
  "Convert S to a floating point time.
If S is already a number, just return it.  If it is a string,
parse it as a time string and apply `float-time' to it.  If S is
nil, just return 0."
  (cond
   ((numberp s) s)
   ((stringp s)
    (condition-case nil
	(float-time (apply #'encode-time (org-parse-time-string s)))
      (error 0)))
   (t 0)))

(defun org-time= (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (= a b))))

(defun org-time< (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (< a b))))

(defun org-time<= (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (<= a b))))

(defun org-time> (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (> a b))))

(defun org-time>= (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (>= a b))))

(defun org-time<> (a b)
  (let ((a (org-2ft a))
	(b (org-2ft b)))
    (and (> a 0) (> b 0) (\= a b))))

(defun org-parse-time-string (s &optional nodefault)
  "Parse Org time string S.

If time is not given, defaults to 0:00.  However, with optional
NODEFAULT, hour and minute fields are nil if not given.

Throw an error if S does not contain a valid Org time string.
Note that the first match for YYYY-MM-DD will be used (e.g.,
\"-52000-02-03\" will be taken as \"2000-02-03\").

This should be a lot faster than the `parse-time-string'."
  (unless (string-match org-ts-regexp0 s)
    (error "Not an Org time string: %s" s))
  (list 0
	(cond ((match-beginning 8) (string-to-number (match-string 8 s)))
	      (nodefault nil)
	      (t 0))
	(cond ((match-beginning 7) (string-to-number (match-string 7 s)))
	      (nodefault nil)
	      (t 0))
	(string-to-number (match-string 4 s))
	(string-to-number (match-string 3 s))
	(string-to-number (match-string 2 s))
	nil nil nil))

(defun org-matcher-time (s)
  "Interpret a time comparison value S as a floating point time.

S can be an Org time stamp, a modifier, e.g., \"<+2d>\", or the
following special strings: \"<now>\", \"<today>\",
\"<tomorrow>\", and \"<yesterday>\".

Return 0. if S is not recognized as a valid value."
  (let ((today (float-time (apply #'encode-time
				  (append '(0 0 0) (nthcdr 3 (decode-time)))))))
    (save-match-data
      (cond
       ((string= s "<now>") (float-time))
       ((string= s "<today>") today)
       ((string= s "<tomorrow>") (+ 86400.0 today))
       ((string= s "<yesterday>") (- today 86400.0))
       ((string-match "\\`<\\([-+][0-9]+\\)\\([hdwmy]\\)>\\'" s)
	(+ today
	   (* (string-to-number (match-string 1 s))
	      (cdr (assoc (match-string 2 s)
			  '(("d" . 86400.0)   ("w" . 604800.0)
			    ("m" . 2678400.0) ("y" . 31557600.0)))))))
       ((string-match org-ts-regexp0 s) (org-2ft s))
       (t 0.)))))

(defun org-scroll (key &optional additional-keys)
  "Receive KEY and scroll the current window accordingly.
When ADDITIONAL-KEYS is not nil, also include SPC and DEL in the
allowed keys for scrolling, as expected in the export dispatch
window."
  (let ((scrlup (if additional-keys '(?\s 22) 22))
	(scrldn (if additional-keys `(?\d 134217846) 134217846)))
    (eval
     `(cl-case ,key
	;; C-n
	(14 (if (not (pos-visible-in-window-p (point-max)))
		(ignore-errors (scroll-up 1))
	      (message "End of buffer")
	      (sit-for 1)))
	;; C-p
	(16 (if (not (pos-visible-in-window-p (point-min)))
		(ignore-errors (scroll-down 1))
	      (message "Beginning of buffer")
	      (sit-for 1)))
	;; SPC or
	(,scrlup
	 (if (not (pos-visible-in-window-p (point-max)))
	     (scroll-up nil)
	   (message "End of buffer")
	   (sit-for 1)))
	;; DEL
	(,scrldn (if (not (pos-visible-in-window-p (point-min)))
		     (scroll-down nil)
		   (message "Beginning of buffer")
		   (sit-for 1)))))))

(provide 'org-macs)

;; Local variables:
;; generated-autoload-file: "org-loaddefs.el"
;; End:

;;; org-macs.el ends here

debug log:

solving a02f713ca ...
found a02f713ca in https://git.savannah.gnu.org/cgit/emacs/org-mode.git

(*) 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/org-mode.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).