code.delx.au - gnu-emacs/blob - lisp/org/org-footnote.el

   1 ;;; org-footnote.el --- Footnote support in Org and elsewhere
   2 ;;
   3 ;; Copyright (C) 2009 Free Software Foundation, Inc.
   4 ;;
   5 ;; Author: Carsten Dominik <carsten at orgmode dot org>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 6.29c
   9 ;;
  10 ;; This file is part of GNU Emacs.
  11 ;;
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  25 ;;
  26 ;;; Commentary:
  27
  28 ;; This file contains the code dealing with footnotes in Org-mode.
  29 ;; The code can also be used in arbitrary text modes to provide
  30 ;; footnotes.  Compared to Steven L Baur's footnote.el it provides
  31 ;; better support for resuming editing.  It is less configurable than
  32 ;; Steve's code, though.
  33
  34 ;;; Code:
  35
  36 (eval-when-compile
  37   (require 'cl))
  38 (require 'org-macs)
  39 (require 'org-compat)
  40
  41 (declare-function org-in-regexp "org" (re &optional nlines visually))
  42 (declare-function org-mark-ring-push "org" (&optional pos buffer))
  43 (declare-function outline-next-heading "outline")
  44 (declare-function org-trim "org" (s))
  45 (declare-function org-show-context "org" (&optional key))
  46 (declare-function org-back-to-heading "org" (&optional invisible-ok))
  47 (declare-function org-end-of-subtree "org"  (&optional invisible-ok to-heading))
  48 (defvar org-odd-levels-only) ;; defined in org.el
  49
  50 (defconst org-footnote-re
  51   (concat "[^][\n]"   ; to make sure it is not at the beginning of a line
  52           "\\["
  53           "\\(?:"
  54           "\\([0-9]+\\)"
  55           "\\|"
  56           (org-re "\\(fn:\\([-_[:word:]]+?\\)?\\)\\(?::\\([^\]]*?\\)\\)?")
  57           "\\)"
  58           "\\]")
  59   "Regular expression for matching footnotes.")
  60
  61 (defconst org-footnote-definition-re
  62   (org-re "^\\(\\[\\([0-9]+\\|fn:[-_[:word:]]+\\)\\]\\)")
  63   "Regular expression matching the definition of a footnote.")
  64
  65 (defcustom org-footnote-section "Footnotes"
  66   "Outline heading containing footnote definitions before export.
  67 This can be nil, to place footnotes locally at the end of the current
  68 outline node.  If can also be the name of a special outline heading
  69 under which footnotes should be put.
  70 This variable defines the place where Org puts the definition
  71 automatically, i.e. when creating the footnote, and when sorting the notes.
  72 However, by hand you may place definitions *anywhere*.
  73 If this is a string, during export, all subtrees starting with this
  74 heading will be removed after extracting footnote definitions."
  75   :group 'org-footnotes
  76   :type '(choice
  77           (string :tag "Collect fotnotes under heading")
  78           (const :tag "Define footnotes locally" nil)))
  79
  80 (defcustom org-footnote-tag-for-non-org-mode-files "Footnotes:"
  81   "Tag marking the beginning of footnote section.
  82 The Org-mode footnote engine can be used in arbitrary text files as well
  83 as in Org-mode.  Outside Org-mode, new footnotes are always placed at
  84 the end of the file.  When you normalize the notes, any line containing
  85 only this tag will be removed, a new one will be inserted at the end
  86 of the file, followed by the collected and normalized footnotes."
  87   :group 'org-footnotes
  88   :type 'string)
  89
  90 (defcustom org-footnote-define-inline nil
  91   "Non-nil means, define footnotes inline, at reference location.
  92 When nil, footnotes will be defined in a special section near
  93 the end of the document.  When t, the [fn:label:definition] notation
  94 will be used to define the footnote at the reference position."
  95   :group 'org-footnote
  96   :type 'boolean)
  97
  98 (defcustom org-footnote-auto-label t
  99   "Non-nil means, define automatically new labels for footnotes.
 100 Possible values are:
 101
 102 nil        prompt the user for each label
 103 t          create unique labels of the form [fn:1], [fn:2], ...
 104 confirm    like t, but let the user edit the created value.  In particular,
 105            the label can be removed from the minibuffer, to create
 106            an anonymous footnote.
 107 plain      Automatically create plain number labels like [1]"
 108   :group 'org-footnote
 109   :type '(choice
 110           (const :tag "Frompt for label" nil)
 111           (const :tag "Create automatic [fn:N]" t)
 112           (const :tag "Offer automatic [fn:N] for editing" confirm)
 113           (const :tag "Create automatic [N]" plain)))
 114
 115 (defcustom org-footnote-auto-adjust nil
 116   "Non-nil means, automatically adjust footnotes after insert/delete.
 117 When this is t, after each insertion or deletion of a footnote,
 118 simple fn:N footnotes will be renumbered, and all footnotes will be sorted.
 119 If you want to have just sorting or just renumbering, set this variable
 120 to `sort' or `renumber'.
 121
 122 The main values of this variable can be set with in-buffer options:
 123
 124 #+STARTUP: fnadjust
 125 #+STARTUP: nofnadjust"
 126   :group 'org-footnote
 127   :type '(choice
 128           (const :tag "Renumber" renumber)
 129           (const :tag "Sort" sort)
 130           (const :tag "Renumber and Sort" t)))
 131
 132 (defcustom org-footnote-fill-after-inline-note-extraction nil
 133   "Non-nil means, fill paragraphs after extracting footnotes.
 134 When extracting inline footnotes, the lengths of lines can change a lot.
 135 When this option is set, paragraphs from which an inline footnote has been
 136 extracted will be filled again."
 137   :group 'org-footnote
 138   :type 'boolean)
 139
 140 (defun org-footnote-at-reference-p ()
 141   "Is the cursor at a footnote reference?
 142 If yes, return the beginning position, the label, and the definition, if local."
 143   (when (org-in-regexp org-footnote-re 15)
 144     (list (match-beginning 0)
 145           (or (match-string 1)
 146               (if (equal (match-string 2) "fn:") nil (match-string 2)))
 147           (match-string 4))))
 148
 149 (defun org-footnote-at-definition-p ()
 150   "Is the cursor at a footnote definition.
 151 This matches only pure definitions like [1] or [fn:name] at the beginning
 152 of a line.  It does not a references like [fn:name:definition], where the
 153 footnote text is included and defined locally.
 154 The return value will be nil if not at a footnote definition, and a list
 155 with start and label of the footnote if there is a definition at point."
 156   (save-excursion
 157     (end-of-line 1)
 158     (let ((lim (save-excursion (re-search-backward "^\\*+ \\|^[ \t]*$" nil t))))
 159       (when (re-search-backward org-footnote-definition-re lim t)
 160         (list (match-beginning 0) (match-string 2))))))
 161
 162 (defun org-footnote-goto-definition (label)
 163   "Find the definition of the footnote with label LABEL."
 164   (interactive "sLabel: ")
 165   (org-mark-ring-push)
 166   (setq label (org-footnote-normalize-label label))
 167   (let ((re (format "^\\[%s\\]\\|.\\[%s:" label label))
 168         pos)
 169     (save-excursion
 170       (setq pos (or (re-search-forward re nil t)
 171                     (and (goto-char (point-min))
 172                          (re-search-forward re nil t))
 173                     (and (progn (widen) t)
 174                          (goto-char (point-min))
 175                          (re-search-forward re nil t)))))
 176     (if (not pos)
 177         (error "Cannot find definition of footnote %s" label)
 178       (goto-char pos)
 179       (org-show-context 'link-search)
 180       (message "Edit definition and go back with `C-c &' or, if unique, with `C-c C-c'."))))
 181
 182 (defun org-footnote-goto-next-reference (label)
 183   "Find the definition of the footnote with label LABEL."
 184   (interactive "sLabel: ")
 185   (org-mark-ring-push)
 186   (setq label (org-footnote-normalize-label label))
 187   (let ((re (format ".\\[%s[]:]" label))
 188         (p0 (point)) pos)
 189     (save-excursion
 190       (setq pos (or (re-search-forward re nil t)
 191                     (and (goto-char (point-min))
 192                          (re-search-forward re nil t))
 193                     (and (progn (widen) t)
 194                          (goto-char p0)
 195                          (re-search-forward re nil t))
 196                     (and (goto-char (point-min))
 197                          (re-search-forward re nil t)))))
 198     (if pos
 199         (progn
 200           (goto-char pos)
 201           (org-show-context 'link-search))
 202       (error "Cannot find reference of footnote %s" label))))
 203
 204 (defun org-footnote-normalize-label (label)
 205   (if (numberp label) (setq label (number-to-string label)))
 206   (if (not (string-match "^[0-9]+$\\|^$\\|^fn:" label))
 207       (setq label (concat "fn:" label)))
 208   label)
 209
 210 (defun org-footnote-all-labels ()
 211   "Return list with all defined foot labels used in the buffer."
 212   (let (rtn l)
 213     (save-excursion
 214       (save-restriction
 215         (widen)
 216         (goto-char (point-min))
 217         (while (re-search-forward org-footnote-definition-re nil t)
 218           (setq l (org-match-string-no-properties 2))
 219           (and l (add-to-list 'rtn l)))
 220         (goto-char (point-min))
 221         (while (re-search-forward org-footnote-re nil t)
 222           (setq l (or (org-match-string-no-properties 1)
 223                       (org-match-string-no-properties 2)))
 224           (and l (not (equal l "fn:")) (add-to-list 'rtn l)))))
 225     rtn))
 226
 227 (defun org-footnote-unique-label (&optional current)
 228   "Return a new unique footnote label.
 229 The returns the firsts fn:N labels that is currently not used."
 230   (unless current (setq current (org-footnote-all-labels)))
 231   (let ((fmt (if (eq org-footnote-auto-label 'plain) "%d" "fn:%d"))
 232         (cnt 1))
 233     (while (member (format fmt cnt) current)
 234       (incf cnt))
 235     (format fmt cnt)))
 236
 237 (defvar org-footnote-label-history nil
 238   "History of footnote labels entered in current buffer.")
 239 (make-variable-buffer-local 'org-footnote-label-history)
 240
 241 (defun org-footnote-new ()
 242   "Insert a new footnote.
 243 This command prompts for a label.  If this is a label referencing an
 244 existing label, only insert the label.  If the footnote label is empty
 245 or new, let the user edit the definition of the footnote."
 246   (interactive)
 247   (let* ((labels (org-footnote-all-labels))
 248          (propose (org-footnote-unique-label labels))
 249          (label
 250           (if (member org-footnote-auto-label '(t plain))
 251               propose
 252             (completing-read
 253              "Label (leave empty for anonymous): "
 254              (mapcar 'list labels) nil nil
 255              (if (eq org-footnote-auto-label 'confirm) propose nil)
 256              'org-footnote-label-history))))
 257     (setq label (org-footnote-normalize-label label))
 258     (cond
 259      ((equal label "")
 260       (insert "[fn:: ]")
 261       (backward-char 1))
 262      ((member label labels)
 263       (insert "[" label "]")
 264       (message "New reference to existing note"))
 265      (org-footnote-define-inline
 266       (insert "[" label ": ]")
 267       (backward-char 1)
 268       (org-footnote-auto-adjust-maybe))
 269      (t
 270       (insert "[" label "]")
 271       (org-footnote-create-definition label)
 272       (org-footnote-auto-adjust-maybe)))))
 273
 274 (defun org-footnote-create-definition (label)
 275   "Start the definition of a footnote with label LABEL."
 276   (interactive "sLabel: ")
 277   (setq label (org-footnote-normalize-label label))
 278   (let (re)
 279     (cond
 280      ((org-mode-p)
 281       (if (not org-footnote-section)
 282           ;; No section, put footnote into the current outline node
 283           nil
 284         ;; Try to find or make the special node
 285         (setq re (concat "^\\*+[ \t]+" org-footnote-section "[ \t]*$"))
 286         (unless (or (re-search-forward re nil t)
 287                     (and (progn (widen) t)
 288                          (re-search-forward re nil t)))
 289           (goto-char (point-max))
 290           (insert "\n\n* " org-footnote-section "\n")))
 291       ;; Now go to the end of this entry and insert there.
 292       (org-footnote-goto-local-insertion-point))
 293      (t
 294       (setq re (concat "^" org-footnote-tag-for-non-org-mode-files "[ \t]*$"))
 295       (unless (re-search-forward re nil t)
 296         (goto-char (point-max))
 297         (skip-chars-backward " \t\r\n")
 298         (insert "\n\n")
 299         (delete-region (point) (point-max))
 300         (insert org-footnote-tag-for-non-org-mode-files "\n"))
 301       (goto-char (point-max))
 302       (skip-chars-backward " \t\r\n")))
 303     (insert "\n\n")
 304     (insert "[" label "] ")
 305     (message "Edit definition and go back with `C-c &' or, if unique, with `C-c C-c'.")))
 306
 307 ;;;###autoload
 308 (defun org-footnote-action (&optional special)
 309   "Do the right thing for footnotes.
 310 When at a footnote reference, jump to the definition.  When at a definition,
 311 jump to the refernces.  When neither at definition or reference,
 312 create a new footnote, interactively.
 313 With prefix arg SPECIAL, offer additional commands in a menu."
 314   (interactive "P")
 315   (let (tmp c)
 316     (cond
 317      (special
 318       (message "Footnotes: [s]ort  |  [r]enumber fn:N  |  [S]=r+s |->[n]umeric  |  [d]elete")
 319       (setq c (read-char-exclusive))
 320       (cond
 321        ((equal c ?s)
 322         (org-footnote-normalize 'sort))
 323        ((equal c ?r)
 324         (org-footnote-renumber-fn:N))
 325        ((equal c ?S)
 326         (org-footnote-renumber-fn:N)
 327         (org-footnote-normalize 'sort))
 328        ((equal c ?n)
 329         (org-footnote-normalize))
 330        ((equal c ?d)
 331         (org-footnote-delete))
 332        (t (error "No such footnote command %c" c))))
 333      ((setq tmp (org-footnote-at-reference-p))
 334       (if (nth 1 tmp)
 335           (org-footnote-goto-definition (nth 1 tmp))
 336         (goto-char (match-beginning 4))))
 337      ((setq tmp (org-footnote-at-definition-p))
 338       (org-footnote-goto-next-reference (nth 1 tmp)))
 339      (t (org-footnote-new)))))
 340
 341 ;;;###autoload
 342 (defun org-footnote-normalize (&optional sort-only for-preprocessor)
 343   "Collect the footnotes in various formats and normalize them.
 344 This finds the different sorts of footnotes allowed in Org, and
 345 normalizes them to the usual [N] format that is understood by the
 346 Org-mode exporters.
 347 When SORT-ONLY is set, only sort the footnote definitions into the
 348 referenced sequence."
 349   ;; This is based on Paul's function, but rewritten.
 350   (let* ((limit-level
 351           (and (boundp 'org-inlinetask-min-level)
 352                org-inlinetask-min-level
 353                (1- org-inlinetask-min-level)))
 354          (nstars (and limit-level
 355                       (if org-odd-levels-only
 356                           (and limit-level (1- (* limit-level 2)))
 357                         limit-level)))
 358          (outline-regexp
 359           (concat "\\*" (if nstars (format "\\{1,%d\\} " nstars) "+ ")))
 360          (count 0)
 361          ref def idef ref-table beg beg1 marker a before ins-point)
 362      (save-excursion
 363       ;; Now find footnote references, and extract the definitions
 364       (goto-char (point-min))
 365       (while (re-search-forward org-footnote-re nil t)
 366         (org-if-unprotected
 367          (setq def (match-string 4)
 368                idef def
 369                ref (or (match-string 1) (match-string 2))
 370                before (char-to-string (char-after (match-beginning 0))))
 371          (if (equal ref "fn:") (setq ref nil))
 372          (if (and ref (setq a (assoc ref ref-table)))
 373              (progn
 374                (setq marker (nth 1 a))
 375                (unless (nth 2 a) (setf (caddr a) def)))
 376            (setq marker (number-to-string (incf count))))
 377          (save-match-data
 378            (if def
 379                (setq def (org-trim def))
 380              (save-excursion
 381                (goto-char (point-min))
 382                (if (not (re-search-forward (concat "^\\[" (regexp-quote ref)
 383                                                    "\\]") nil t))
 384                    (setq def nil)
 385                  (setq beg (match-beginning 0))
 386                  (setq beg1 (match-end 0))
 387                  (re-search-forward
 388                   (org-re "^[ \t]*$\\|^\\*+ \\|^\\[\\([0-9]+\\|fn:[-_[:word:]]+\\)\\]")
 389                   nil 'move)
 390                  (setq def (buffer-substring beg1 (or (match-beginning 0)
 391                                                       (point-max))))
 392                  (goto-char beg)
 393                  (skip-chars-backward " \t\n\t")
 394                  (delete-region (1+ (point)) (match-beginning 0))))))
 395          (unless sort-only
 396            (replace-match (concat before "[" marker "]"))
 397            (and idef
 398                 org-footnote-fill-after-inline-note-extraction
 399                 (fill-paragraph)))
 400          (if (not a) (push (list ref marker def (if idef t nil)) ref-table))))
 401
 402       ;; First find and remove the footnote section
 403       (goto-char (point-min))
 404       (cond
 405        ((org-mode-p)
 406         (if (and org-footnote-section
 407                  (re-search-forward
 408                   (concat "^\\*[ \t]+" (regexp-quote org-footnote-section)
 409                           "[ \t]*$")
 410                   nil t))
 411             (if (or for-preprocessor (not org-footnote-section))
 412                 (replace-match "")
 413               (org-back-to-heading t)
 414               (forward-line 1)
 415               (setq ins-point (point))
 416               (delete-region (point) (org-end-of-subtree t)))
 417           (goto-char (point-max))
 418           (unless for-preprocessor
 419             (when org-footnote-section
 420               (or (bolp) (insert "\n"))
 421               (insert "* " org-footnote-section "\n")
 422               (setq ins-point (point))))))
 423        (t
 424         (if (re-search-forward
 425              (concat "^"
 426                      (regexp-quote org-footnote-tag-for-non-org-mode-files)
 427                      "[ \t]*$")
 428              nil t)
 429             (replace-match ""))
 430         (goto-char (point-max))
 431         (skip-chars-backward " \t\n\r")
 432         (delete-region (point) (point-max))
 433         (insert "\n\n" org-footnote-tag-for-non-org-mode-files "\n")
 434         (setq ins-point (point))))
 435
 436       ;; Insert the footnotes again
 437       (goto-char (or ins-point (point-max)))
 438       (setq ref-table (reverse ref-table))
 439       (when sort-only
 440         ;; remove anonymous and inline footnotes from the list
 441         (setq ref-table
 442               (delq nil (mapcar
 443                          (lambda (x) (and (car x)
 444                                           (not (equal (car x) "fn:"))
 445                                           (not (nth 3 x))
 446                                           x))
 447                          ref-table))))
 448       ;; Make sure each footnote has a description, or an error message.
 449       (setq ref-table
 450             (mapcar
 451              (lambda (x)
 452                (if (not (nth 2 x))
 453                    (setcar (cddr x)
 454                            (format "FOOTNOTE DEFINITION NOT FOUND: %s" (car x)))
 455                  (setcar (cddr x) (org-trim (nth 2 x))))
 456                x)
 457              ref-table))
 458
 459       (if (or (not (org-mode-p))     ; not an Org file
 460               org-footnote-section   ; we do not use a footnote section
 461               (not sort-only)        ; this is normalization
 462               for-preprocessor)       ; the is the preprocessor
 463           ;; Insert the footnotes together in one place
 464           (progn
 465             (setq def
 466                   (mapconcat
 467                    (lambda (x)
 468                      (format "[%s] %s" (nth (if sort-only 0 1) x)
 469                              (org-trim (nth 2 x))))
 470                    ref-table "\n\n"))
 471             (if ref-table (insert "\n" def "\n\n")))
 472         ;; Insert each footnote near the first reference
 473         ;; Happens only in Org files with no special footnote section,
 474         ;; and only when doing sorting
 475         (mapc 'org-insert-footnote-reference-near-definition
 476               ref-table)))))
 477
 478 (defun org-insert-footnote-reference-near-definition (entry)
 479   "Find first reference of footnote ENTRY and insert the definition there.
 480 ENTRY is (fn-label num-mark definition)."
 481   (when (car entry)
 482     (goto-char (point-min))
 483     (when (re-search-forward (format ".\\[%s[]:]" (regexp-quote (car entry)))
 484                              nil t)
 485       (org-footnote-goto-local-insertion-point)
 486       (insert (format "\n\n[%s] %s" (car entry) (nth 2 entry))))))
 487
 488 (defun org-footnote-goto-local-insertion-point ()
 489   "Find insertion point for footnote, just before next outline heading."
 490   (org-with-limited-levels (outline-next-heading))
 491   (or (bolp) (newline))
 492   (beginning-of-line 0)
 493   (while (and (not (bobp)) (= (char-after) ?#))
 494     (beginning-of-line 0))
 495   (if (looking-at "[ \t]*#\\+TBLFM:") (beginning-of-line 2))
 496   (end-of-line 1)
 497   (skip-chars-backward "\n\r\t "))
 498
 499 (defun org-footnote-delete (&optional label)
 500   "Delete the footnote at point.
 501 This will remove the definition (even multiple definitions if they exist)
 502 and all references of a footnote label."
 503   (catch 'done
 504     (let (x label l beg def-re (nref 0) (ndef 0))
 505       (unless label
 506         (when (setq x (org-footnote-at-reference-p))
 507           (setq label (nth 1 x))
 508           (when (or (not label) (equal "fn:" label))
 509             (delete-region (1+ (match-beginning 0)) (match-end 0))
 510             (message "Anonymous footnote removed")
 511             (throw 'done t)))
 512         (when (and (not label) (setq x (org-footnote-at-definition-p)))
 513           (setq label (nth 1 x)))
 514         (unless label (error "Don't know which footnote to remove")))
 515       (save-excursion
 516         (save-restriction
 517           (goto-char (point-min))
 518           (while (re-search-forward org-footnote-re nil t)
 519             (setq l (or (match-string 1) (match-string 2)))
 520             (when (equal l label)
 521               (delete-region (1+ (match-beginning 0)) (match-end 0))
 522               (incf nref)))
 523           (goto-char (point-min))
 524           (setq def-re (concat "^\\[" (regexp-quote label) "\\]"))
 525           (while (re-search-forward def-re nil t)
 526             (setq beg (match-beginning 0))
 527             (if (re-search-forward "^\\[\\|^[ \t]*$\\|^\\*+ " nil t)
 528                 (goto-char (match-beginning 0))
 529               (goto-char (point-max)))
 530             (delete-region beg (point))
 531             (incf ndef))))
 532       (org-footnote-auto-adjust-maybe)
 533       (message "%d definition(s) of and %d reference(s) of footnote %s removed"
 534                ndef nref label))))
 535
 536 (defun org-footnote-renumber-fn:N ()
 537   "Renumber the simple footnotes like fn:17 into a sequence in the document."
 538   (interactive)
 539   (let (map i (n 0))
 540     (save-excursion
 541       (save-restriction
 542         (widen)
 543         (goto-char (point-min))
 544         (while (re-search-forward "\\[fn:\\([0-9]+\\)[]:]" nil t)
 545           (setq i (string-to-number (match-string 1)))
 546           (when (and (string-match "\\S-" (buffer-substring
 547                                            (point-at-bol) (match-beginning 0)))
 548                      (not (assq i map)))
 549             (push (cons i (number-to-string (incf n))) map)))
 550         (goto-char (point-min))
 551         (while (re-search-forward "\\(\\[fn:\\)\\([0-9]+\\)\\([]:]\\)" nil t)
 552           (replace-match (concat "\\1" (cdr (assq (string-to-number (match-string 2)) map)) "\\3")))))))
 553
 554 (defun org-footnote-auto-adjust-maybe ()
 555   "Renumber and/or sort footnotes according to user settings."
 556   (when (memq org-footnote-auto-adjust '(t renumber))
 557     (org-footnote-renumber-fn:N))
 558   (when (memq org-footnote-auto-adjust '(t sort))
 559     (let ((label (nth 1 (org-footnote-at-definition-p))))
 560       (org-footnote-normalize 'sort)
 561       (when label
 562         (goto-char (point-min))
 563         (and (re-search-forward (concat "^\\[" (regexp-quote label) "\\]")
 564                                 nil t)
 565              (progn (insert " ")
 566                     (just-one-space)))))))
 567
 568 (provide 'org-footnote)
 569
 570 ;; arch-tag: 1b5954df-fb5d-4da5-8709-78d944dbfc37
 571
 572 ;;; org-footnote.el ends here