emacs-orgmode@gnu.org archives
 help / color / mirror / code / Atom feed
blob be736160231cf81bd6c1008e6c1d53aacf6fc6cf 36746 bytes (raw)
name: lisp/org-footnote.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
 
;;; org-footnote.el --- Footnote support in Org      -*- lexical-binding: t; -*-
;;
;; Copyright (C) 2009-2018 Free Software Foundation, Inc.
;;
;; Author: Carsten Dominik <carsten at orgmode dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: http://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 the code dealing with footnotes in Org mode.

;;; Code:

;;;; Declarations

(require 'cl-lib)
(require 'org-macs)
(require 'org-compat)

(declare-function org-at-comment-p "org" ())
(declare-function org-at-heading-p "org" (&optional ignored))
(declare-function org-back-over-empty-lines "org" ())
(declare-function org-edit-footnote-reference "org-src" ())
(declare-function org-element-at-point "org-element" ())
(declare-function org-element-class "org-element" (datum &optional parent))
(declare-function org-element-context "org-element" (&optional element))
(declare-function org-element-lineage "org-element" (blob &optional types with-self))
(declare-function org-element-property "org-element" (property element))
(declare-function org-element-type "org-element" (element))
(declare-function org-end-of-subtree "org"  (&optional invisible-ok to-heading))
(declare-function org-fill-paragraph "org" (&optional justify region))
(declare-function org-in-block-p "org" (names))
(declare-function org-in-regexp "org" (re &optional nlines visually))
(declare-function org-in-verbatim-emphasis "org" ())
(declare-function org-inside-LaTeX-fragment-p "org" ())
(declare-function org-inside-latex-macro-p "org" ())
(declare-function org-mark-ring-push "org" (&optional pos buffer))
(declare-function org-show-context "org" (&optional key))
(declare-function org-trim "org" (s &optional keep-lead))
(declare-function outline-next-heading "outline")

(defvar electric-indent-mode)
(defvar org-blank-before-new-entry)	; defined in org.el
(defvar org-bracket-link-regexp)	; defined in org.el
(defvar org-complex-heading-regexp)	; defined in org.el
(defvar org-odd-levels-only)		; defined in org.el
(defvar org-outline-regexp)		; defined in org.el
(defvar org-outline-regexp-bol)		; defined in org.el

\f
;;;; Constants

(defconst org-footnote-re
  "\\[fn:\\(?:\\(?1:[-_[:word:]]+\\)?\\(:\\)\\|\\(?1:[-_[:word:]]+\\)\\]\\)"
  "Regular expression for matching footnotes.
Match group 1 contains footnote's label.  It is nil for anonymous
footnotes.  Match group 2 is non-nil only when footnote is
inline, i.e., it contains its own definition.")

(defconst org-footnote-definition-re "^\\[fn:\\([-_[:word:]]+\\)\\]"
  "Regular expression matching the definition of a footnote.
Match group 1 contains definition's label.")

(defconst org-footnote-forbidden-blocks '("comment" "example" "export" "src")
  "Names of blocks where footnotes are not allowed.")

\f
;;;; Customization

(defgroup org-footnote nil
  "Footnotes in Org mode."
  :tag "Org Footnote"
  :group 'org)

(defcustom org-footnote-section "Footnotes"
  "Outline heading containing footnote definitions.

This can be nil, to place footnotes locally at the end of the
current outline node.  If can also be the name of a special
outline heading under which footnotes should be put.

This variable defines the place where Org puts the definition
automatically, i.e. when creating the footnote, and when sorting
the notes.  However, by hand you may place definitions
*anywhere*.

If this is a string, during export, all subtrees starting with
this heading will be ignored.

If you don't use the customize interface to change this variable,
you will need to run the following command after the change:

  `\\[universal-argument] \\[org-element-cache-reset]'"
  :group 'org-footnote
  :initialize 'custom-initialize-default
  :set (lambda (var val)
	 (set var val)
	 (when (fboundp 'org-element-cache-reset)
	   (org-element-cache-reset 'all)))
  :type '(choice
	  (string :tag "Collect footnotes under heading")
	  (const :tag "Define footnotes locally" nil)))

(defcustom org-footnote-define-inline nil
  "Non-nil means define footnotes inline, at reference location.
When nil, footnotes will be defined in a special section near
the end of the document.  When t, the [fn:label:definition] notation
will be used to define the footnote at the reference position."
  :group 'org-footnote
  :type 'boolean)

(defcustom org-footnote-auto-label t
  "Non-nil means define automatically new labels for footnotes.
Possible values are:

nil        Prompt the user for each label.
t          Create unique labels of the form [fn:1], [fn:2], etc.
confirm    Like t, but let the user edit the created value.
           The label can be removed from the minibuffer to create
           an anonymous footnote.
random	   Automatically generate a unique, random label."
  :group 'org-footnote
  :type '(choice
	  (const :tag "Prompt for label" nil)
	  (const :tag "Create automatic [fn:N]" t)
	  (const :tag "Offer automatic [fn:N] for editing" confirm)
	  (const :tag "Create a random label" random)))

(defcustom org-footnote-auto-adjust nil
  "Non-nil means automatically adjust footnotes after insert/delete.
When this is t, after each insertion or deletion of a footnote,
simple fn:N footnotes will be renumbered, and all footnotes will be sorted.
If you want to have just sorting or just renumbering, set this variable
to `sort' or `renumber'.

The main values of this variable can be set with in-buffer options:

#+STARTUP: fnadjust
#+STARTUP: nofnadjust"
  :group 'org-footnote
  :type '(choice
	  (const :tag "No adjustment" nil)
	  (const :tag "Renumber" renumber)
	  (const :tag "Sort" sort)
	  (const :tag "Renumber and Sort" t)))

(defcustom org-footnote-fill-after-inline-note-extraction nil
  "Non-nil means fill paragraphs after extracting footnotes.
When extracting inline footnotes, the lengths of lines can change a lot.
When this option is set, paragraphs from which an inline footnote has been
extracted will be filled again."
  :group 'org-footnote
  :type 'boolean)

\f
;;;; Predicates

(defun org-footnote-in-valid-context-p ()
  "Is point in a context where footnotes are allowed?"
  (save-match-data
    (not (or (org-at-comment-p)
	     (org-inside-LaTeX-fragment-p)
	     ;; Avoid literal example.
	     (org-in-verbatim-emphasis)
	     (save-excursion
	       (beginning-of-line)
	       (looking-at "[ \t]*:[ \t]+"))
	     ;; Avoid forbidden blocks.
	     (org-in-block-p org-footnote-forbidden-blocks)))))

(defun org-footnote-at-reference-p ()
  "Is the cursor at a footnote reference?

If so, return a list containing its label, beginning and ending
positions, and the definition, when inlined."
  (when (and (org-footnote-in-valid-context-p)
	     (or (looking-at org-footnote-re)
		 (org-in-regexp org-footnote-re)
		 (save-excursion (re-search-backward org-footnote-re nil t)))
	     (/= (match-beginning 0) (line-beginning-position)))
    (let* ((beg (match-beginning 0))
	   (label (match-string-no-properties 1))
	   ;; Inline footnotes don't end at (match-end 0) as
	   ;; `org-footnote-re' stops just after the second colon.
	   ;; Find the real ending with `scan-sexps', so Org doesn't
	   ;; get fooled by unrelated closing square brackets.
	   (end (ignore-errors (scan-sexps beg 1))))
      ;; Point is really at a reference if it's located before true
      ;; ending of the footnote.
      (when (and end
		 (< (point) end)
		 ;; Verify match isn't a part of a link.
		 (not (save-excursion
			(goto-char beg)
			(let ((linkp
			       (save-match-data
				 (org-in-regexp org-bracket-link-regexp))))
			  (and linkp (< (point) (cdr linkp))))))
		 ;; Verify point doesn't belong to a LaTeX macro.
		 (not (org-inside-latex-macro-p)))
	(list label beg end
	      ;; Definition: ensure this is an inline footnote first.
	      (and (match-end 2)
		   (org-trim
		    (buffer-substring-no-properties
		     (match-end 0) (1- end)))))))))

(defun org-footnote-at-definition-p ()
  "Is point within a footnote definition?

This matches only pure definitions like [1] or [fn:name] at the
beginning of a line.  It does not match references like
\[fn:name:definition], where the footnote text is included and
defined locally.

The return value will be nil if not at a footnote definition, and
a list with label, start, end and definition of the footnote
otherwise."
  (when (save-excursion (beginning-of-line) (org-footnote-in-valid-context-p))
    (save-excursion
      (end-of-line)
      ;; Footnotes definitions are separated by new headlines, another
      ;; footnote definition or 2 blank lines.
      (let ((lim (save-excursion
		   (re-search-backward
		    (concat org-outline-regexp-bol
			    "\\|^\\([ \t]*\n\\)\\{2,\\}") nil t))))
	(when (re-search-backward org-footnote-definition-re lim t)
	  (let ((label (match-string-no-properties 1))
		(beg (match-beginning 0))
		(beg-def (match-end 0))
		(end (if (progn
			   (end-of-line)
			   (re-search-forward
			    (concat org-outline-regexp-bol "\\|"
				    org-footnote-definition-re "\\|"
				    "^\\([ \t]*\n\\)\\{2,\\}") nil 'move))
			 (match-beginning 0)
		       (point))))
	    (list label beg end
		  (org-trim (buffer-substring-no-properties beg-def end)))))))))

\f
;;;; Internal functions

(defun org-footnote--allow-reference-p ()
  "Non-nil when a footnote reference can be inserted at point."
  ;; XXX: This is similar to `org-footnote-in-valid-context-p' but
  ;; more accurate and usually faster, except in some corner cases.
  ;; It may replace it after doing proper benchmarks as it would be
  ;; used in fontification.
  (unless (bolp)
    (let* ((context (org-element-context))
	   (type (org-element-type context)))
      (cond
       ;; No footnote reference in attributes.
       ((let ((post (org-element-property :post-affiliated context)))
	  (and post (< (point) post)))
	nil)
       ;; Paragraphs and blank lines at top of document are fine.
       ((memq type '(nil paragraph)))
       ;; So are contents of verse blocks.
       ((eq type 'verse-block)
	(and (>= (point) (org-element-property :contents-begin context))
	     (< (point) (org-element-property :contents-end context))))
       ;; In an headline or inlinetask, point must be either on the
       ;; heading itself or on the blank lines below.
       ((memq type '(headline inlinetask))
	(or (not (org-at-heading-p))
	    (and (save-excursion
		   (beginning-of-line)
		   (and (let ((case-fold-search t))
			  (not (looking-at-p "\\*+ END[ \t]*$")))
			(let ((case-fold-search nil))
			  (looking-at org-complex-heading-regexp))))
		 (match-beginning 4)
		 (>= (point) (match-beginning 4))
		 (or (not (match-beginning 5))
		     (< (point) (match-beginning 5))))))
       ;; White spaces after an object or blank lines after an element
       ;; are OK.
       ((>= (point)
	    (save-excursion (goto-char (org-element-property :end context))
			    (skip-chars-backward " \r\t\n")
			    (if (eq (org-element-class context) 'object) (point)
			      (1+ (line-beginning-position 2))))))
       ;; Other elements are invalid.
       ((eq (org-element-class context) 'element) nil)
       ;; Just before object is fine.
       ((= (point) (org-element-property :begin context)))
       ;; Within recursive object too, but not in a link.
       ((eq type 'link) nil)
       ((let ((cbeg (org-element-property :contents-begin context))
	      (cend (org-element-property :contents-end context)))
	  (and cbeg (>= (point) cbeg) (<= (point) cend))))))))

(defun org-footnote--clear-footnote-section ()
  "Remove all footnote sections in buffer and create a new one.
New section is created at the end of the buffer.  Leave point
within the new section."
  (when org-footnote-section
    (goto-char (point-min))
    (let ((regexp (format "^\\*+ +%s[ \t]*$"
			  (regexp-quote org-footnote-section))))
      (while (re-search-forward regexp nil t)
	(delete-region
	 (match-beginning 0)
	 (org-end-of-subtree t t))))
    (goto-char (point-max))
    ;; Clean-up blank lines at the end of the buffer.
    (skip-chars-backward " \r\t\n")
    (unless (bobp)
      (forward-line)
      (when (eolp) (insert "\n")))
    (delete-region (point) (point-max))
    (when (and (cdr (assq 'heading org-blank-before-new-entry))
	       (zerop (save-excursion (org-back-over-empty-lines))))
      (insert "\n"))
    (insert "* " org-footnote-section "\n")))

(defun org-footnote--set-label (label)
  "Set label of footnote at point to string LABEL.
Assume point is at the beginning of the reference or definition
to rename."
  (forward-char 4)
  (cond ((eq (char-after) ?:) (insert label))
	((looking-at "\\([-_[:word:]]+\\)") (replace-match label nil nil nil 1))
	(t nil)))

(defun org-footnote--collect-references (&optional anonymous)
  "Collect all labeled footnote references in current buffer.

Return an alist where associations follow the pattern

  (LABEL MARKER TOP-LEVEL SIZE)

with

  LABEL     the label of the of the definition,
  MARKER    a marker pointing to its beginning,
  TOP-LEVEL a boolean, nil when the footnote is contained within
            another one,
  SIZE      the length of the inline definition, in characters,
            or nil for non-inline references.

When optional ANONYMOUS is non-nil, also collect anonymous
references.  In such cases, LABEL is nil.

References are sorted according to a deep-reading order."
  (org-with-wide-buffer
   (goto-char (point-min))
   (let ((regexp (if anonymous org-footnote-re "\\[fn:[-_[:word:]]+[]:]"))
	 references nested)
     (save-excursion
       (while (re-search-forward regexp nil t)
	 ;; Ignore definitions.
	 (unless (and (eq (char-before) ?\])
		      (= (line-beginning-position) (match-beginning 0)))
	   ;; Ensure point is within the reference before parsing it.
	   (backward-char)
	   (let ((object (org-element-context)))
	     (when (eq (org-element-type object) 'footnote-reference)
	       (let* ((label (org-element-property :label object))
		      (begin (org-element-property :begin object))
		      (size
		       (and (eq (org-element-property :type object) 'inline)
			    (- (org-element-property :contents-end object)
			       (org-element-property :contents-begin object)))))
		 (let ((d (org-element-lineage object '(footnote-definition))))
		   (push (list label (copy-marker begin) (not d) size)
			 references)
		   (when d
		     ;; Nested references are stored in alist NESTED.
		     ;; Associations there follow the pattern
		     ;;
		     ;;   (DEFINITION-LABEL . REFERENCES)
		     (let* ((def-label (org-element-property :label d))
			    (labels (assoc def-label nested)))
		       (if labels (push label (cdr labels))
			 (push (list def-label label) nested)))))))))))
     ;; Sort the list of references.  Nested footnotes have priority
     ;; over top-level ones.
     (letrec ((ordered nil)
	      (add-reference
	       (lambda (ref allow-nested)
		 (when (or allow-nested (nth 2 ref))
		   (push ref ordered)
		   (dolist (r (mapcar (lambda (l) (assoc l references))
				      (reverse
				       (cdr (assoc (nth 0 ref) nested)))))
		     (funcall add-reference r t))))))
       (dolist (r (reverse references) (nreverse ordered))
	 (funcall add-reference r nil))))))

(defun org-footnote--collect-definitions (&optional delete)
  "Collect all footnote definitions in current buffer.

Return an alist where associations follow the pattern

  (LABEL . DEFINITION)

with LABEL and DEFINITION being, respectively, the label and the
definition of the footnote, as strings.

When optional argument DELETE is non-nil, delete the definition
while collecting them."
  (org-with-wide-buffer
   (goto-char (point-min))
   (let (definitions seen)
     (while (re-search-forward org-footnote-definition-re nil t)
       (backward-char)
       (let ((element (org-element-at-point)))
	 (let ((label (org-element-property :label element)))
	   (when (and (eq (org-element-type element) 'footnote-definition)
		      (not (member label seen)))
	     (push label seen)
	     (let* ((beg (progn
			   (goto-char (org-element-property :begin element))
			   (skip-chars-backward " \r\t\n")
			   (if (bobp) (point) (line-beginning-position 2))))
		    (end (progn
			   (goto-char (org-element-property :end element))
			   (skip-chars-backward " \r\t\n")
			   (line-beginning-position 2)))
		    (def (org-trim (buffer-substring-no-properties beg end))))
	       (push (cons label def) definitions)
	       (when delete (delete-region beg end)))))))
     definitions)))

(defun org-footnote--goto-local-insertion-point ()
  "Find insertion point for footnote, just before next outline heading.
Assume insertion point is within currently accessible part of the buffer."
  (org-with-limited-levels (outline-next-heading))
  (skip-chars-backward " \t\n")
  (unless (bobp) (forward-line))
  (unless (bolp) (insert "\n")))

\f
;;;; Navigation

(defun org-footnote-get-next-reference (&optional label backward limit)
  "Return complete reference of the next footnote.

If LABEL is provided, get the next reference of that footnote.  If
BACKWARD is non-nil, find previous reference instead.  LIMIT is
the buffer position bounding the search.

Return value is a list like those provided by `org-footnote-at-reference-p'.
If no footnote is found, return nil."
  (save-excursion
    (let* ((label-fmt (if label (format "\\[fn:%s[]:]" label) org-footnote-re)))
      (catch 'exit
	(while t
	  (unless (funcall (if backward #'re-search-backward #'re-search-forward)
			   label-fmt limit t)
	    (throw 'exit nil))
	  (unless backward (backward-char))
	  (let ((ref (org-footnote-at-reference-p)))
	    (when ref (throw 'exit ref))))))))

(defun org-footnote-next-reference-or-definition (limit)
  "Move point to next footnote reference or definition.

LIMIT is the buffer position bounding the search.

Return value is a list like those provided by
`org-footnote-at-reference-p' or `org-footnote-at-definition-p'.
If no footnote is found, return nil."
  (let* (ref (origin (point)))
    (catch 'exit
      (while t
	(unless (re-search-forward org-footnote-re limit t)
	  (goto-char origin)
	  (throw 'exit nil))
	;; Beware: with non-inline footnotes point will be just after
	;; the closing square bracket.
	(backward-char)
	(cond
	 ((setq ref (org-footnote-at-reference-p))
	  (throw 'exit ref))
	 ;; Definition: also grab the last square bracket, matched in
	 ;; `org-footnote-re' for non-inline footnotes.
	 ((save-match-data (org-footnote-at-definition-p))
	  (let ((end (match-end 0)))
	    (throw 'exit
		   (list nil (match-beginning 0)
			 (if (eq (char-before end) ?\]) end (1+ end)))))))))))

(defun org-footnote-goto-definition (label &optional location)
  "Move point to the definition of the footnote LABEL.

LOCATION, when non-nil specifies the buffer position of the
definition.

Throw an error if there is no definition or if it cannot be
reached from current narrowed part of buffer.  Return a non-nil
value if point was successfully moved."
  (interactive "sLabel: ")
  (let* ((label (org-footnote-normalize-label label))
	 (def-start (or location (nth 1 (org-footnote-get-definition label)))))
    (cond
     ((not def-start)
      (user-error "Cannot find definition of footnote %s" label))
     ((or (> def-start (point-max)) (< def-start (point-min)))
      (user-error "Definition is outside narrowed part of buffer")))
    (org-mark-ring-push)
    (goto-char def-start)
    (looking-at (format "\\[fn:%s[]:] ?" (regexp-quote label)))
    (goto-char (match-end 0))
    (org-show-context 'link-search)
    (when (derived-mode-p 'org-mode)
      (message "%s" (substitute-command-keys
		     "Edit definition and go back with \
`\\[org-mark-ring-goto]' or, if unique, with `\\[org-ctrl-c-ctrl-c]'.")))
    t))

(defun org-footnote-goto-previous-reference (label)
  "Find the first closest (to point) reference of footnote with label LABEL."
  (interactive "sLabel: ")
  (org-mark-ring-push)
  (let ((label (org-footnote-normalize-label label))
	ref)
    (save-excursion
      (setq ref (or (org-footnote-get-next-reference label t)
		    (org-footnote-get-next-reference label)
		    (save-restriction
		      (widen)
		      (or
		       (org-footnote-get-next-reference label t)
		       (org-footnote-get-next-reference label))))))
    (if (not ref)
	(error "Cannot find reference of footnote %s" label)
      (goto-char (nth 1 ref))
      (org-show-context 'link-search))))

\f
;;;; Getters

(defun org-footnote-normalize-label (label)
  "Return LABEL without \"fn:\" prefix.
If LABEL is the empty string or constituted of white spaces only,
return nil instead."
  (pcase (org-trim label)
    ("" nil)
    ((pred (string-prefix-p "fn:")) (substring label 3))
    (_ label)))

(defun org-footnote-get-definition (label)
  "Return label, boundaries and definition of the footnote LABEL."
  (let* ((label (regexp-quote (org-footnote-normalize-label label)))
	 (re (format "^\\[fn:%s\\]\\|.\\[fn:%s:" label label)))
    (org-with-wide-buffer
     (goto-char (point-min))
     (catch 'found
       (while (re-search-forward re nil t)
	 (let* ((datum (progn (backward-char) (org-element-context)))
		(type (org-element-type datum)))
	   (when (memq type '(footnote-definition footnote-reference))
	     (throw 'found
		    (list
		     label
		     (org-element-property :begin datum)
		     (org-element-property :end datum)
		     (let ((cbeg (org-element-property :contents-begin datum)))
		       (if (not cbeg) ""
			 (replace-regexp-in-string
			  "[ \t\n]*\\'"
			  ""
			  (buffer-substring-no-properties
			   cbeg
			   (org-element-property :contents-end datum))))))))))
       nil))))

(defun org-footnote-all-labels ()
  "List all defined footnote labels used throughout the buffer.
This function ignores narrowing, if any."
  (org-with-wide-buffer
   (goto-char (point-min))
   (let (all)
     (while (re-search-forward org-footnote-re nil t)
       (backward-char)
       (let ((context (org-element-context)))
	 (when (memq (org-element-type context)
		     '(footnote-definition footnote-reference))
	   (let ((label (org-element-property :label context)))
	     (when label (cl-pushnew label all :test #'equal))))))
     all)))

(defun org-footnote-unique-label (&optional current)
  "Return a new unique footnote label.

The function returns the first numeric label currently unused.

Optional argument CURRENT is the list of labels active in the
buffer."
  (let ((current (or current (org-footnote-all-labels))))
    (let ((count 1))
      (while (member (number-to-string count) current)
	(cl-incf count))
      (number-to-string count))))

\f
;;;; Adding, Deleting Footnotes

(defun org-footnote-new ()
  "Insert a new footnote.
This command prompts for a label.  If this is a label referencing an
existing label, only insert the label.  If the footnote label is empty
or new, let the user edit the definition of the footnote."
  (interactive)
  (unless (org-footnote--allow-reference-p)
    (user-error "Cannot insert a footnote here"))
  (let* ((all (org-footnote-all-labels))
	 (label
	  (if (eq org-footnote-auto-label 'random)
	      (format "%x" (random most-positive-fixnum))
	    (org-footnote-normalize-label
	     (let ((propose (org-footnote-unique-label all)))
	       (if (eq org-footnote-auto-label t) propose
		 (completing-read
		  "Label (leave empty for anonymous): "
		  (mapcar #'list all) nil nil
		  (and (eq org-footnote-auto-label 'confirm) propose))))))))
    (cond ((not label)
	   (insert "[fn::]")
	   (backward-char 1))
	  ((member label all)
	   (insert "[fn:" label "]")
	   (message "New reference to existing note"))
	  (org-footnote-define-inline
	   (insert "[fn:" label ":]")
	   (backward-char 1)
	   (org-footnote-auto-adjust-maybe))
	  (t
	   (insert "[fn:" label "]")
	   (let ((p (org-footnote-create-definition label)))
	     ;; `org-footnote-goto-definition' needs to be called
	     ;; after `org-footnote-auto-adjust-maybe'.  Otherwise
	     ;; both label and location of the definition are lost.
	     ;; On the contrary, it needs to be called before
	     ;; `org-edit-footnote-reference' so that the remote
	     ;; editing buffer can display the correct label.
	     (if (ignore-errors (org-footnote-goto-definition label p))
		 (org-footnote-auto-adjust-maybe)
	       ;; Definition was created outside current scope: edit
	       ;; it remotely.
	       (org-footnote-auto-adjust-maybe)
	       (org-edit-footnote-reference)))))))

(defun org-footnote-create-definition (label)
  "Start the definition of a footnote with label LABEL.
Return buffer position at the beginning of the definition.  This
function doesn't move point."
  (let ((label (org-footnote-normalize-label label))
	electric-indent-mode)		; Prevent wrong indentation.
    (org-preserve-local-variables
     (org-with-wide-buffer
      (cond
       ((not org-footnote-section) (org-footnote--goto-local-insertion-point))
       ((save-excursion
	  (goto-char (point-min))
	  (re-search-forward
	   (concat "^\\*+[ \t]+" (regexp-quote org-footnote-section) "[ \t]*$")
	   nil t))
	(goto-char (match-end 0))
	(forward-line)
	(unless (bolp) (insert "\n")))
       (t (org-footnote--clear-footnote-section)))
      (when (zerop (org-back-over-empty-lines)) (insert "\n"))
      (insert "[fn:" label "] \n")
      (line-beginning-position 0)))))

(defun org-footnote-delete-references (label)
  "Delete every reference to footnote LABEL.
Return the number of footnotes removed."
  (save-excursion
    (goto-char (point-min))
    (let (ref (nref 0))
      (while (setq ref (org-footnote-get-next-reference label))
	(goto-char (nth 1 ref))
	(delete-region (nth 1 ref) (nth 2 ref))
	(cl-incf nref))
      nref)))

(defun org-footnote-delete-definitions (label)
  "Delete every definition of the footnote LABEL.
Return the number of footnotes removed."
  (save-excursion
    (goto-char (point-min))
    (let ((def-re (format "^\\[fn:%s\\]" (regexp-quote label)))
	  (ndef 0))
      (while (re-search-forward def-re nil t)
	(pcase (org-footnote-at-definition-p)
	  (`(,_ ,start ,end ,_)
	   ;; Remove the footnote, and all blank lines before it.
	   (delete-region (progn
			    (goto-char start)
			    (skip-chars-backward " \r\t\n")
			    (if (bobp) (point) (line-beginning-position 2)))
			  (progn
			    (goto-char end)
			    (skip-chars-backward " \r\t\n")
			    (if (bobp) (point) (line-beginning-position 2))))
	   (cl-incf ndef))))
      ndef)))

(defun org-footnote-delete (&optional label)
  "Delete the footnote at point.
This will remove the definition (even multiple definitions if they exist)
and all references of a footnote label.

If LABEL is non-nil, delete that footnote instead."
  (catch 'done
    (org-preserve-local-variables
     (let* ((nref 0) (ndef 0) x
	    ;; 1. Determine LABEL of footnote at point.
	    (label (cond
		    ;; LABEL is provided as argument.
		    (label)
		    ;; Footnote reference at point.  If the footnote is
		    ;; anonymous, delete it and exit instead.
		    ((setq x (org-footnote-at-reference-p))
		     (or (car x)
			 (progn
			   (delete-region (nth 1 x) (nth 2 x))
			   (message "Anonymous footnote removed")
			   (throw 'done t))))
		    ;; Footnote definition at point.
		    ((setq x (org-footnote-at-definition-p))
		     (car x))
		    (t (error "Don't know which footnote to remove")))))
       ;; 2. Now that LABEL is non-nil, find every reference and every
       ;; definition, and delete them.
       (setq nref (org-footnote-delete-references label)
	     ndef (org-footnote-delete-definitions label))
       ;; 3. Verify consistency of footnotes and notify user.
       (org-footnote-auto-adjust-maybe)
       (message "%d definition(s) of and %d reference(s) of footnote %s removed"
		ndef nref label)))))

\f
;;;; Sorting, Renumbering, Normalizing

(defun org-footnote-renumber-fn:N ()
  "Order numbered footnotes into a sequence in the document."
  (interactive)
  (let* ((c 0)
	 (references (cl-remove-if-not
		      (lambda (r) (string-match-p "\\`[0-9]+\\'" (car r)))
		      (org-footnote--collect-references)))
	 (alist (mapcar (lambda (l) (cons l (number-to-string (cl-incf c))))
			(delete-dups (mapcar #'car references)))))
    (org-with-wide-buffer
     ;; Re-number references.
     (dolist (ref references)
       (goto-char (nth 1 ref))
       (org-footnote--set-label (cdr (assoc (nth 0 ref) alist))))
     ;; Re-number definitions.
     (goto-char (point-min))
     (while (re-search-forward "^\\[fn:\\([0-9]+\\)\\]" nil t)
       (replace-match (or (cdr (assoc (match-string 1) alist))
			  ;; Un-referenced definitions get higher
			  ;; numbers.
			  (number-to-string (cl-incf c)))
		      nil nil nil 1)))))

(defun org-footnote-sort ()
  "Rearrange footnote definitions in the current buffer.
Sort footnote definitions so they match order of footnote
references.  Also relocate definitions at the end of their
relative section or within a single footnote section, according
to `org-footnote-section'.  Inline definitions are ignored."
  (let ((references (org-footnote--collect-references)))
    (org-preserve-local-variables
     (let ((definitions (org-footnote--collect-definitions 'delete)))
       (org-with-wide-buffer
	(org-footnote--clear-footnote-section)
	;; Insert footnote definitions at the appropriate location,
	;; separated by a blank line.  Each definition is inserted
	;; only once throughout the buffer.
	(let (inserted)
	  (dolist (cell references)
	    (let ((label (car cell))
		  (nested (not (nth 2 cell)))
		  (inline (nth 3 cell)))
	      (unless (or (member label inserted) inline)
		(push label inserted)
		(unless (or org-footnote-section nested)
		  ;; If `org-footnote-section' is non-nil, or
		  ;; reference is nested, point is already at the
		  ;; correct position.  Otherwise, move at the
		  ;; appropriate location within the section
		  ;; containing the reference.
		  (goto-char (nth 1 cell))
		  (org-footnote--goto-local-insertion-point))
		(insert "\n"
			(or (cdr (assoc label definitions))
			    (format "[fn:%s] DEFINITION NOT FOUND." label))
			"\n"))))
	  ;; Insert un-referenced footnote definitions at the end.
	  (pcase-dolist (`(,label . ,definition) definitions)
	    (unless (member label inserted)
	      (insert "\n" definition "\n")))))))))

(defun org-footnote-normalize ()
  "Turn every footnote in buffer into a numbered one."
  (interactive)
  (org-preserve-local-variables
   (let ((n 0)
	 (translations nil)
	 (definitions nil)
	 (references (org-footnote--collect-references 'anonymous)))
     (org-with-wide-buffer
      ;; Update label for reference.  We need to do this before
      ;; clearing definitions in order to rename nested footnotes
      ;; before they are deleted.
      (dolist (cell references)
	(let* ((label (car cell))
	       (anonymous (not label))
	       (new
		(cond
		 ;; In order to differentiate anonymous references
		 ;; from regular ones, set their labels to integers,
		 ;; not strings.
		 (anonymous (setcar cell (cl-incf n)))
		 ((cdr (assoc label translations)))
		 (t (let ((l (number-to-string (cl-incf n))))
		      (push (cons label l) translations)
		      l)))))
	  (goto-char (nth 1 cell))	; Move to reference's start.
	  (org-footnote--set-label
	   (if anonymous (number-to-string new) new))
	  (let ((size (nth 3 cell)))
	    ;; Transform inline footnotes into regular references and
	    ;; retain their definition for later insertion as
	    ;; a regular footnote definition.
	    (when size
	      (let ((def (concat
			  (format "[fn:%s] " new)
			  (org-trim
			   (substring
			    (delete-and-extract-region
			     (point) (+ (point) size 1))
			    1)))))
		(push (cons (if anonymous new label) def) definitions)
		(when org-footnote-fill-after-inline-note-extraction
		  (org-fill-paragraph)))))))
      ;; Collect definitions.  Update labels according to ALIST.
      (let ((definitions
	      (nconc definitions
		     (org-footnote--collect-definitions 'delete)))
	    (inserted))
	(org-footnote--clear-footnote-section)
	(dolist (cell references)
	  (let* ((label (car cell))
		 (anonymous (integerp label))
		 (pos (nth 1 cell)))
	    ;; Move to appropriate location, if required.  When there
	    ;; is a footnote section or reference is nested, point is
	    ;; already at the expected location.
	    (unless (or org-footnote-section (not (nth 2 cell)))
	      (goto-char pos)
	      (org-footnote--goto-local-insertion-point))
	    ;; Insert new definition once label is updated.
	    (unless (member label inserted)
	      (push label inserted)
	      (let ((stored (cdr (assoc label definitions)))
		    ;; Anonymous footnotes' label is already
		    ;; up-to-date.
		    (new (if anonymous label
			   (cdr (assoc label translations)))))
		(insert "\n"
			(cond
			 ((not stored)
			  (format "[fn:%s] DEFINITION NOT FOUND." new))
			 (anonymous stored)
			 (t
			  (replace-regexp-in-string
			   "\\`\\[fn:\\(.*?\\)\\]" new stored nil nil 1)))
			"\n")))))
	;; Insert un-referenced footnote definitions at the end.
	(pcase-dolist (`(,label . ,definition) definitions)
	  (unless (member label inserted)
	    (insert "\n"
		    (replace-regexp-in-string org-footnote-definition-re
					      (format "[fn:%d]" (cl-incf n))
					      definition)
		    "\n"))))))))

(defun org-footnote-auto-adjust-maybe ()
  "Renumber and/or sort footnotes according to user settings."
  (when (memq org-footnote-auto-adjust '(t renumber))
    (org-footnote-renumber-fn:N))
  (when (memq org-footnote-auto-adjust '(t sort))
    (let ((label (car (org-footnote-at-definition-p))))
      (org-footnote-sort)
      (when label
	(goto-char (point-min))
	(and (re-search-forward (format "^\\[fn:%s\\]" (regexp-quote label))
				nil t)
	     (progn (insert " ")
		    (just-one-space)))))))

\f
;;;; End-user interface

;;;###autoload
(defun org-footnote-action (&optional special)
  "Do the right thing for footnotes.

When at a footnote reference, jump to the definition.

When at a definition, jump to the references if they exist, offer
to create them otherwise.

When neither at definition or reference, create a new footnote,
interactively if possible.

With prefix arg SPECIAL, or when no footnote can be created,
offer additional commands in a menu."
  (interactive "P")
  (let* ((context (and (not special) (org-element-context)))
	 (type (org-element-type context)))
    (cond
     ;; On white space after element, insert a new footnote.
     ((and context
	   (> (point)
	      (save-excursion
		(goto-char (org-element-property :end context))
		(skip-chars-backward " \t")
		(point))))
      (org-footnote-new))
     ((eq type 'footnote-reference)
      (let ((label (org-element-property :label context)))
	(cond
	 ;; Anonymous footnote: move point at the beginning of its
	 ;; definition.
	 ((not label)
	  (goto-char (org-element-property :contents-begin context)))
	 ;; Check if a definition exists: then move to it.
	 ((let ((p (nth 1 (org-footnote-get-definition label))))
	    (when p (org-footnote-goto-definition label p))))
	 ;; No definition exists: offer to create it.
	 ((yes-or-no-p (format "No definition for %s.  Create one? " label))
	  (let ((p (org-footnote-create-definition label)))
	    (or (ignore-errors (org-footnote-goto-definition label p))
		;; Since definition was created outside current scope,
		;; edit it remotely.
		(org-edit-footnote-reference)))))))
     ((eq type 'footnote-definition)
      (org-footnote-goto-previous-reference
       (org-element-property :label context)))
     ((or special (not (org-footnote--allow-reference-p)))
      (message "Footnotes: [s]ort | [r]enumber fn:N | [S]=r+s | [n]ormalize | \
\[d]elete")
      (pcase (read-char-exclusive)
	(?s (org-footnote-sort))
	(?r (org-footnote-renumber-fn:N))
	(?S (org-footnote-renumber-fn:N)
	    (org-footnote-sort))
	(?n (org-footnote-normalize))
	(?d (org-footnote-delete))
	(char (error "No such footnote command %c" char))))
     (t (org-footnote-new)))))


(provide 'org-footnote)

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

;;; org-footnote.el ends here

debug log:

solving be7361602 ...
found be7361602 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).