941 lines
35 KiB
EmacsLisp
941 lines
35 KiB
EmacsLisp
;;; org-footnote.el --- Footnote support in Org and elsewhere
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;;
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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;;
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;; Author: Carsten Dominik <carsten at orgmode dot org>
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;; Keywords: outlines, hypermedia, calendar, wp
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;; Homepage: http://orgmode.org
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;;
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;
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;;; Commentary:
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;; This file contains the code dealing with footnotes in Org-mode.
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;; The code can also be used in arbitrary text modes to provide
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;; footnotes. Compared to Steven L Baur's footnote.el it provides
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;; better support for resuming editing. It is less configurable than
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;; Steve's code, though.
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;;; Code:
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(eval-when-compile
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(require 'cl))
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(require 'org-macs)
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(require 'org-compat)
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(declare-function message-point-in-header-p "message" ())
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(declare-function org-back-over-empty-lines "org" ())
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(declare-function org-back-to-heading "org" (&optional invisible-ok))
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(declare-function org-combine-plists "org" (&rest plists))
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(declare-function org-end-of-subtree "org" (&optional invisible-ok to-heading))
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(declare-function org-export-preprocess-string "org-exp"
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(string &rest parameters))
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(declare-function org-fill-paragraph "org" (&optional justify))
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(declare-function org-icompleting-read "org" (&rest args))
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(declare-function org-id-uuid "org-id" ())
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(declare-function org-in-block-p "org" (names))
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(declare-function org-in-commented-line "org" ())
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(declare-function org-in-indented-comment-line "org" ())
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(declare-function org-in-regexp "org" (re &optional nlines visually))
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(declare-function org-in-verbatim-emphasis "org" ())
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(declare-function org-inside-LaTeX-fragment-p "org" ())
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(declare-function org-inside-latex-macro-p "org" ())
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(declare-function org-mark-ring-push "org" (&optional pos buffer))
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(declare-function org-show-context "org" (&optional key))
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(declare-function org-trim "org" (s))
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(declare-function org-skip-whitespace "org" ())
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(declare-function outline-next-heading "outline")
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(declare-function org-skip-whitespace "org" ())
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(defvar org-outline-regexp-bol) ; defined in org.el
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(defvar org-odd-levels-only) ; defined in org.el
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(defvar org-bracket-link-regexp) ; defined in org.el
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(defvar message-cite-prefix-regexp) ; defined in message.el
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(defvar message-signature-separator) ; defined in message.el
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(defconst org-footnote-re
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;; Only [1]-like footnotes are closed in this regexp, as footnotes
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;; from other types might contain square brackets (i.e. links) in
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;; their definition.
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;;
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;; `org-re' is used for regexp compatibility with XEmacs.
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(concat "\\[\\(?:"
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;; Match inline footnotes.
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(org-re "fn:\\([-_[:word:]]+\\)?:\\|")
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;; Match other footnotes.
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"\\(?:\\([0-9]+\\)\\]\\)\\|"
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(org-re "\\(fn:[-_[:word:]]+\\)")
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"\\)")
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"Regular expression for matching footnotes.")
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(defconst org-footnote-definition-re
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(org-re "^\\[\\([0-9]+\\|fn:[-_[:word:]]+\\)\\]")
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"Regular expression matching the definition of a footnote.")
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(defconst org-footnote-forbidden-blocks
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'("ascii" "beamer" "comment" "docbook" "example" "html" "latex" "odt" "src")
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"Names of blocks where footnotes are not allowed.")
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(defgroup org-footnote nil
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"Footnotes in Org-mode."
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:tag "Org Footnote"
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:group 'org)
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(defcustom org-footnote-section "Footnotes"
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"Outline heading containing footnote definitions before export.
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This can be nil, to place footnotes locally at the end of the current
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outline node. If can also be the name of a special outline heading
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under which footnotes should be put.
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This variable defines the place where Org puts the definition
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automatically, i.e. when creating the footnote, and when sorting the notes.
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However, by hand you may place definitions *anywhere*.
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If this is a string, during export, all subtrees starting with this
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heading will be removed after extracting footnote definitions."
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:group 'org-footnote
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:type '(choice
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(string :tag "Collect footnotes under heading")
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(const :tag "Define footnotes locally" nil)))
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(defcustom org-footnote-tag-for-non-org-mode-files "Footnotes:"
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"Tag marking the beginning of footnote section.
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The Org footnote engine can be used in arbitrary text files as well
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as in Org-mode. Outside Org mode, new footnotes are always placed at
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the end of the file. When you normalize the notes, any line containing
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only this tag will be removed, a new one will be inserted at the end
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of the file, followed by the collected and normalized footnotes.
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If you don't want any tag in such buffers, set this variable to nil."
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:group 'org-footnote
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:type '(choice
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(string :tag "Collect footnotes under tag")
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(const :tag "Don't use a tag" nil)))
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(defcustom org-footnote-define-inline nil
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"Non-nil means define footnotes inline, at reference location.
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When nil, footnotes will be defined in a special section near
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the end of the document. When t, the [fn:label:definition] notation
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will be used to define the footnote at the reference position."
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:group 'org-footnote
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:type 'boolean)
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(defcustom org-footnote-auto-label t
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"Non-nil means define automatically new labels for footnotes.
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Possible values are:
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nil prompt the user for each label
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t create unique labels of the form [fn:1], [fn:2], ...
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confirm like t, but let the user edit the created value. In particular,
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the label can be removed from the minibuffer, to create
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an anonymous footnote.
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random Automatically generate a unique, random label.
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plain Automatically create plain number labels like [1]"
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:group 'org-footnote
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:type '(choice
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(const :tag "Prompt for label" nil)
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(const :tag "Create automatic [fn:N]" t)
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(const :tag "Offer automatic [fn:N] for editing" confirm)
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(const :tag "Create a random label" random)
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(const :tag "Create automatic [N]" plain)))
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(defcustom org-footnote-auto-adjust nil
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"Non-nil means automatically adjust footnotes after insert/delete.
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When this is t, after each insertion or deletion of a footnote,
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simple fn:N footnotes will be renumbered, and all footnotes will be sorted.
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If you want to have just sorting or just renumbering, set this variable
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to `sort' or `renumber'.
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The main values of this variable can be set with in-buffer options:
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#+STARTUP: fnadjust
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#+STARTUP: nofnadjust"
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:group 'org-footnote
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:type '(choice
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(const :tag "Renumber" renumber)
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(const :tag "Sort" sort)
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(const :tag "Renumber and Sort" t)))
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(defcustom org-footnote-fill-after-inline-note-extraction nil
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"Non-nil means fill paragraphs after extracting footnotes.
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When extracting inline footnotes, the lengths of lines can change a lot.
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When this option is set, paragraphs from which an inline footnote has been
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extracted will be filled again."
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:group 'org-footnote
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:type 'boolean)
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(defun org-footnote-in-valid-context-p ()
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"Is point in a context where footnotes are allowed?"
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(save-match-data
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(not (or (org-in-commented-line)
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(org-in-indented-comment-line)
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(org-inside-LaTeX-fragment-p)
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;; Avoid protected environments (LaTeX export)
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(get-text-property (point) 'org-protected)
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;; Avoid literal example.
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(org-in-verbatim-emphasis)
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(save-excursion
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(beginning-of-line)
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(looking-at "[ \t]*:[ \t]+"))
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;; Avoid cited text and headers in message-mode.
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(and (derived-mode-p 'message-mode)
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(or (save-excursion
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(beginning-of-line)
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(looking-at message-cite-prefix-regexp))
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(message-point-in-header-p)))
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;; Avoid forbidden blocks.
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(org-in-block-p org-footnote-forbidden-blocks)))))
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(defun org-footnote-at-reference-p ()
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"Is the cursor at a footnote reference?
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If so, return a list containing its label, beginning and ending
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positions, and the definition, when inlined."
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(when (and (org-footnote-in-valid-context-p)
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(or (looking-at org-footnote-re)
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(org-in-regexp org-footnote-re)
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(save-excursion (re-search-backward org-footnote-re nil t)))
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(/= (match-beginning 0) (point-at-bol)))
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(let* ((beg (match-beginning 0))
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(label (or (org-match-string-no-properties 2)
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(org-match-string-no-properties 3)
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;; Anonymous footnotes don't have labels
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(and (match-string 1)
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(concat "fn:" (org-match-string-no-properties 1)))))
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;; Inline footnotes don't end at (match-end 0) as
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;; `org-footnote-re' stops just after the second colon.
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;; Find the real ending with `scan-sexps', so Org doesn't
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;; get fooled by unrelated closing square brackets.
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(end (ignore-errors (scan-sexps beg 1))))
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;; Point is really at a reference if it's located before true
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;; ending of the footnote.
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(when (and end (< (point) end)
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;; Verify match isn't a part of a link.
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(not (save-excursion
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(goto-char beg)
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(let ((linkp
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(save-match-data
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(org-in-regexp org-bracket-link-regexp))))
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(and linkp (< (point) (cdr linkp))))))
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;; Verify point doesn't belong to a LaTeX macro.
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;; Beware though, when two footnotes are side by
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;; side, once the first one is changed into LaTeX,
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;; the second one might then be considered as an
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;; optional argument of the command. Thus, check
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;; the `org-protected' property of that command.
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(or (not (org-inside-latex-macro-p))
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(get-text-property (1- beg) 'org-protected)))
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(list label beg end
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;; Definition: ensure this is an inline footnote first.
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(and (or (not label) (match-string 1))
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(org-trim (buffer-substring-no-properties
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(match-end 0) (1- end)))))))))
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(defun org-footnote-at-definition-p ()
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"Is point within a footnote definition?
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This matches only pure definitions like [1] or [fn:name] at the
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beginning of a line. It does not match references like
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\[fn:name:definition], where the footnote text is included and
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defined locally.
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The return value will be nil if not at a footnote definition, and
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a list with label, start, end and definition of the footnote
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otherwise."
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(when (save-excursion (beginning-of-line) (org-footnote-in-valid-context-p))
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(save-excursion
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(end-of-line)
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;; Footnotes definitions are separated by new headlines or blank
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;; lines.
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(let ((lim (save-excursion (re-search-backward
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(concat org-outline-regexp-bol
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"\\|^[ \t]*$") nil t))))
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(when (re-search-backward org-footnote-definition-re lim t)
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(let ((label (org-match-string-no-properties 1))
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(beg (match-beginning 0))
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(beg-def (match-end 0))
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;; In message-mode, do not search after signature.
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(end (let ((bound (and (derived-mode-p 'message-mode)
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(save-excursion
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(goto-char (point-max))
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(re-search-backward
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message-signature-separator nil t)))))
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(if (progn
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(end-of-line)
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(re-search-forward
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(concat org-outline-regexp-bol "\\|"
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org-footnote-definition-re "\\|"
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"^[ \t]*$") bound 'move))
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(progn (goto-char (match-beginning 0))
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(org-skip-whitespace)
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(point-at-bol))
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(point)))))
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(list label beg end
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(org-trim (buffer-substring-no-properties beg-def end)))))))))
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(defun org-footnote-get-next-reference (&optional label backward limit)
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"Return complete reference of the next footnote.
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If LABEL is provided, get the next reference of that footnote. If
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BACKWARD is non-nil, find previous reference instead. LIMIT is
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the buffer position bounding the search.
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Return value is a list like those provided by `org-footnote-at-reference-p'.
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If no footnote is found, return nil."
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(save-excursion
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(let* ((label-fmt (if label (format "\\[%s[]:]" label) org-footnote-re)))
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(catch 'exit
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(while t
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(unless (funcall (if backward #'re-search-backward #'re-search-forward)
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label-fmt limit t)
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(throw 'exit nil))
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(unless backward (backward-char))
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(let ((ref (org-footnote-at-reference-p)))
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(when ref (throw 'exit ref))))))))
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(defun org-footnote-next-reference-or-definition (limit)
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"Move point to next footnote reference or definition.
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LIMIT is the buffer position bounding the search.
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Return value is a list like those provided by
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`org-footnote-at-reference-p' or `org-footnote-at-definition-p'.
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If no footnote is found, return nil."
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(let* (ref (origin (point)))
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(catch 'exit
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(while t
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(unless (re-search-forward org-footnote-re limit t)
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(goto-char origin)
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(throw 'exit nil))
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;; Beware: with [1]-like footnotes point will be just after
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;; the closing square bracket.
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(backward-char)
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(cond
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((setq ref (org-footnote-at-reference-p))
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(throw 'exit ref))
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;; Definition: also grab the last square bracket, only
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;; matched in `org-footnote-re' for [1]-like footnotes.
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((save-match-data (org-footnote-at-definition-p))
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(let ((end (match-end 0)))
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(throw 'exit
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(list nil (match-beginning 0)
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(if (eq (char-before end) 93) end (1+ end)))))))))))
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(defun org-footnote-get-definition (label)
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"Return label, boundaries and definition of the footnote LABEL."
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(let* ((label (regexp-quote (org-footnote-normalize-label label)))
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(re (format "^\\[%s\\]\\|.\\[%s:" label label))
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pos)
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(save-excursion
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(save-restriction
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(when (or (re-search-forward re nil t)
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(and (goto-char (point-min))
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(re-search-forward re nil t))
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(and (progn (widen) t)
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(goto-char (point-min))
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(re-search-forward re nil t)))
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(let ((refp (org-footnote-at-reference-p)))
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(cond
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((and (nth 3 refp) refp))
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((org-footnote-at-definition-p)))))))))
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(defun org-footnote-goto-definition (label)
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"Move point to the definition of the footnote LABEL.
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Return a non-nil value when a definition has been found."
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(interactive "sLabel: ")
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(org-mark-ring-push)
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(let ((def (org-footnote-get-definition label)))
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(if (not def)
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(error "Cannot find definition of footnote %s" label)
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(goto-char (nth 1 def))
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(looking-at (format "\\[%s\\]\\|\\[%s:" label label))
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(goto-char (match-end 0))
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(org-show-context 'link-search)
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(when (eq major-mode 'org-mode)
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(message "Edit definition and go back with `C-c &' or, if unique, with `C-c C-c'."))
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t)))
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(defun org-footnote-goto-previous-reference (label)
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"Find the first closest (to point) reference of footnote with label LABEL."
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(interactive "sLabel: ")
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(org-mark-ring-push)
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(let* ((label (org-footnote-normalize-label label)) ref)
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(save-excursion
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(setq ref (or (org-footnote-get-next-reference label t)
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(org-footnote-get-next-reference label)
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(save-restriction
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(widen)
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(or
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(org-footnote-get-next-reference label t)
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(org-footnote-get-next-reference label))))))
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(if (not ref)
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(error "Cannot find reference of footnote %s" label)
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(goto-char (nth 1 ref))
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(org-show-context 'link-search))))
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(defun org-footnote-normalize-label (label)
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"Return LABEL as an appropriate string."
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(cond
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((numberp label) (number-to-string label))
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((equal "" label) nil)
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((not (string-match "^[0-9]+$\\|^fn:" label))
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(concat "fn:" label))
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(t label)))
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(defun org-footnote-all-labels (&optional with-defs)
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"Return list with all defined foot labels used in the buffer.
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If WITH-DEFS is non-nil, also associate the definition to each
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label. The function will then return an alist whose key is label
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and value definition."
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(let* (rtn
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(push-to-rtn
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(function
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;; Depending on WITH-DEFS, store label or (label . def) of
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;; footnote reference/definition given as argument in RTN.
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(lambda (el)
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(let ((lbl (car el)))
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(push (if with-defs (cons lbl (nth 3 el)) lbl) rtn))))))
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(save-excursion
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(save-restriction
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(widen)
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;; Find all labels found in definitions.
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(goto-char (point-min))
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(let (def)
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(while (re-search-forward org-footnote-definition-re nil t)
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(when (setq def (org-footnote-at-definition-p))
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(funcall push-to-rtn def))))
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;; Find all labels found in references.
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(goto-char (point-min))
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(let (ref)
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(while (setq ref (org-footnote-get-next-reference))
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(goto-char (nth 2 ref))
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(and (car ref) ; ignore anonymous footnotes
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(not (funcall (if with-defs #'assoc #'member) (car ref) rtn))
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(funcall push-to-rtn ref))))))
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rtn))
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(defun org-footnote-unique-label (&optional current)
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"Return a new unique footnote label.
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The function returns the first \"fn:N\" or \"N\" label that is
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currently not used.
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Optional argument CURRENT is the list of labels active in the
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buffer."
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(unless current (setq current (org-footnote-all-labels)))
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(let ((fmt (if (eq org-footnote-auto-label 'plain) "%d" "fn:%d"))
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(cnt 1))
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(while (member (format fmt cnt) current)
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(incf cnt))
|
|
(format fmt cnt)))
|
|
|
|
(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-in-valid-context-p)
|
|
(error "Cannot insert a footnote here"))
|
|
(let* ((lbls (and (not (equal org-footnote-auto-label 'random))
|
|
(org-footnote-all-labels)))
|
|
(propose (org-footnote-unique-label lbls))
|
|
(label
|
|
(org-footnote-normalize-label
|
|
(cond
|
|
((member org-footnote-auto-label '(t plain))
|
|
propose)
|
|
((equal org-footnote-auto-label 'random)
|
|
(require 'org-id)
|
|
(substring (org-id-uuid) 0 8))
|
|
(t
|
|
(org-icompleting-read
|
|
"Label (leave empty for anonymous): "
|
|
(mapcar 'list lbls) nil nil
|
|
(if (eq org-footnote-auto-label 'confirm) propose nil)))))))
|
|
(cond
|
|
((bolp) (error "Cannot create a footnote reference at left margin"))
|
|
((not label)
|
|
(insert "[fn:: ]")
|
|
(backward-char 1))
|
|
((member label lbls)
|
|
(insert "[" label "]")
|
|
(message "New reference to existing note"))
|
|
(org-footnote-define-inline
|
|
(insert "[" label ": ]")
|
|
(backward-char 1)
|
|
(org-footnote-auto-adjust-maybe))
|
|
(t
|
|
(insert "[" label "]")
|
|
(org-footnote-create-definition label)
|
|
(org-footnote-auto-adjust-maybe)))))
|
|
|
|
(defvar org-blank-before-new-entry) ; silence byte-compiler
|
|
(defun org-footnote-create-definition (label)
|
|
"Start the definition of a footnote with label LABEL."
|
|
(interactive "sLabel: ")
|
|
(let ((label (org-footnote-normalize-label label)))
|
|
(cond
|
|
;; In an Org file.
|
|
((eq major-mode 'org-mode)
|
|
;; If `org-footnote-section' is defined, find it, or create it
|
|
;; at the end of the buffer.
|
|
(when org-footnote-section
|
|
(goto-char (point-min))
|
|
(let ((re (concat "^\\*+[ \t]+" org-footnote-section "[ \t]*$")))
|
|
(unless (or (re-search-forward re nil t)
|
|
(and (progn (widen) t)
|
|
(re-search-forward re nil t)))
|
|
(goto-char (point-max))
|
|
(skip-chars-backward " \t\r\n")
|
|
(unless (bolp) (newline))
|
|
;; Insert new section. Separate it from the previous one
|
|
;; with a blank line, unless `org-blank-before-new-entry'
|
|
;; explicitly says no.
|
|
(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"))))
|
|
;; Move to the end of this entry (which may be
|
|
;; `org-footnote-section' or the current one).
|
|
(org-footnote-goto-local-insertion-point)
|
|
(org-show-context 'link-search))
|
|
(t
|
|
;; In a non-Org file. Search for footnote tag, or create it if
|
|
;; specified (at the end of buffer, or before signature if in
|
|
;; Message mode). Set point after any definition already there.
|
|
(let ((tag (and org-footnote-tag-for-non-org-mode-files
|
|
(concat "^" (regexp-quote
|
|
org-footnote-tag-for-non-org-mode-files)
|
|
"[ \t]*$")))
|
|
(max (if (and (derived-mode-p 'message-mode)
|
|
(goto-char (point-max))
|
|
(re-search-backward
|
|
message-signature-separator nil t))
|
|
(progn
|
|
;; Ensure one blank line separates last
|
|
;; footnote from signature.
|
|
(beginning-of-line)
|
|
(open-line 2)
|
|
(point-marker))
|
|
(point-max-marker))))
|
|
(set-marker-insertion-type max t)
|
|
(goto-char max)
|
|
;; Check if the footnote tag is defined but missing. In this
|
|
;; case, insert it, before any footnote or one blank line
|
|
;; after any previous text.
|
|
(when (and tag (not (re-search-backward tag nil t)))
|
|
(skip-chars-backward " \t\r\n")
|
|
(while (re-search-backward org-footnote-definition-re nil t))
|
|
(unless (bolp) (newline 2))
|
|
(insert org-footnote-tag-for-non-org-mode-files "\n\n"))
|
|
;; Remove superfluous white space and clear marker.
|
|
(goto-char max)
|
|
(skip-chars-backward " \t\r\n")
|
|
(delete-region (point) max)
|
|
(unless (bolp) (newline))
|
|
(set-marker max nil))))
|
|
;; Insert footnote label.
|
|
(when (zerop (org-back-over-empty-lines)) (newline))
|
|
(insert "[" label "] \n")
|
|
(backward-char)
|
|
;; Only notify user about next possible action when in an Org
|
|
;; buffer, as the bindings may have different meanings otherwise.
|
|
(when (eq major-mode 'org-mode)
|
|
(message
|
|
"Edit definition and go back with `C-c &' or, if unique, with `C-c C-c'."))))
|
|
|
|
;;;###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.
|
|
|
|
With prefix arg SPECIAL, offer additional commands in a menu."
|
|
(interactive "P")
|
|
(let (tmp c)
|
|
(cond
|
|
(special
|
|
(message "Footnotes: [s]ort | [r]enumber fn:N | [S]=r+s |->[n]umeric | [d]elete")
|
|
(setq c (read-char-exclusive))
|
|
(cond
|
|
((eq c ?s) (org-footnote-normalize 'sort))
|
|
((eq c ?r) (org-footnote-renumber-fn:N))
|
|
((eq c ?S)
|
|
(org-footnote-renumber-fn:N)
|
|
(org-footnote-normalize 'sort))
|
|
((eq c ?n) (org-footnote-normalize))
|
|
((eq c ?d) (org-footnote-delete))
|
|
(t (error "No such footnote command %c" c))))
|
|
((setq tmp (org-footnote-at-reference-p))
|
|
(cond
|
|
;; Anonymous footnote: move point at the beginning of its
|
|
;; definition.
|
|
((not (car tmp))
|
|
(goto-char (nth 1 tmp))
|
|
(forward-char 5))
|
|
;; A definition exists: move to it.
|
|
((ignore-errors (org-footnote-goto-definition (car tmp))))
|
|
;; No definition exists: offer to create it.
|
|
((yes-or-no-p (format "No definition for %s. Create one? " (car tmp)))
|
|
(org-footnote-create-definition (car tmp)))))
|
|
((setq tmp (org-footnote-at-definition-p))
|
|
(org-footnote-goto-previous-reference (car tmp)))
|
|
(t (org-footnote-new)))))
|
|
|
|
(defvar org-footnote-insert-pos-for-preprocessor 'point-max
|
|
"See `org-footnote-normalize'.")
|
|
|
|
(defvar org-export-footnotes-seen) ; silence byte-compiler
|
|
(defvar org-export-footnotes-data) ; silence byte-compiler
|
|
|
|
;;;###autoload
|
|
(defun org-footnote-normalize (&optional sort-only export-props)
|
|
"Collect the footnotes in various formats and normalize them.
|
|
|
|
This finds the different sorts of footnotes allowed in Org, and
|
|
normalizes them to the usual [N] format that is understood by the
|
|
Org-mode exporters.
|
|
|
|
When SORT-ONLY is set, only sort the footnote definitions into the
|
|
referenced sequence.
|
|
|
|
If Org is amidst an export process, EXPORT-PROPS will hold the
|
|
export properties of the buffer.
|
|
|
|
When EXPORT-PROPS is non-nil, the default action is to insert
|
|
normalized footnotes towards the end of the pre-processing
|
|
buffer. Some exporters (docbook, odt...) expect footnote
|
|
definitions to be available before any references to them. Such
|
|
exporters can let bind `org-footnote-insert-pos-for-preprocessor'
|
|
to symbol `point-min' to achieve the desired behaviour.
|
|
|
|
Additional note on `org-footnote-insert-pos-for-preprocessor':
|
|
1. This variable has not effect when FOR-PREPROCESSOR is nil.
|
|
2. This variable (potentially) obviates the need for extra scan
|
|
of pre-processor buffer as witnessed in
|
|
`org-export-docbook-get-footnotes'."
|
|
;; This is based on Paul's function, but rewritten.
|
|
;;
|
|
;; Re-create `org-with-limited-levels', but not limited to Org
|
|
;; buffers.
|
|
(let* ((limit-level
|
|
(and (boundp 'org-inlinetask-min-level)
|
|
org-inlinetask-min-level
|
|
(1- org-inlinetask-min-level)))
|
|
(nstars (and limit-level
|
|
(if org-odd-levels-only
|
|
(and limit-level (1- (* limit-level 2)))
|
|
limit-level)))
|
|
(org-outline-regexp
|
|
(concat "\\*" (if nstars (format "\\{1,%d\\} " nstars) "+ ")))
|
|
;; Determine the highest marker used so far.
|
|
(ref-table (when export-props org-export-footnotes-seen))
|
|
(count (if (and export-props ref-table)
|
|
(apply 'max (mapcar (lambda (e) (nth 1 e)) ref-table))
|
|
0))
|
|
ins-point ref)
|
|
(save-excursion
|
|
;; 1. Find every footnote reference, extract the definition, and
|
|
;; collect that data in REF-TABLE. If SORT-ONLY is nil, also
|
|
;; normalize references.
|
|
(goto-char (point-min))
|
|
(while (setq ref (org-footnote-get-next-reference))
|
|
(let* ((lbl (car ref))
|
|
(pos (nth 1 ref))
|
|
;; When footnote isn't anonymous, check if it's label
|
|
;; (REF) is already stored in REF-TABLE. In that case,
|
|
;; extract number used to identify it (MARKER). If
|
|
;; footnote is unknown, increment the global counter
|
|
;; (COUNT) to create an unused identifier.
|
|
(a (and lbl (assoc lbl ref-table)))
|
|
(marker (or (nth 1 a) (incf count)))
|
|
;; Is the reference inline or pointing to an inline
|
|
;; footnote?
|
|
(inlinep (or (stringp (nth 3 ref)) (nth 3 a))))
|
|
;; Replace footnote reference with [MARKER]. Maybe fill
|
|
;; paragraph once done. If SORT-ONLY is non-nil, only move
|
|
;; to the end of reference found to avoid matching it twice.
|
|
;; If EXPORT-PROPS isn't nil, also add `org-footnote'
|
|
;; property to it, so it can be easily recognized by
|
|
;; exporters.
|
|
(if sort-only (goto-char (nth 2 ref))
|
|
(delete-region (nth 1 ref) (nth 2 ref))
|
|
(goto-char (nth 1 ref))
|
|
(let ((new-ref (format "[%d]" marker)))
|
|
(when export-props (org-add-props new-ref '(org-footnote t)))
|
|
(insert new-ref))
|
|
(and inlinep
|
|
org-footnote-fill-after-inline-note-extraction
|
|
(org-fill-paragraph)))
|
|
;; Add label (REF), identifier (MARKER), definition (DEF)
|
|
;; type (INLINEP) and position (POS) to REF-TABLE if data
|
|
;; was unknown.
|
|
(unless a
|
|
(let ((def (or (nth 3 ref) ; inline
|
|
(and export-props
|
|
(cdr (assoc lbl org-export-footnotes-data)))
|
|
(nth 3 (org-footnote-get-definition lbl)))))
|
|
(push (list lbl marker
|
|
;; When exporting, each definition goes
|
|
;; through `org-export-preprocess-string' so
|
|
;; it is ready to insert in the
|
|
;; backend-specific buffer.
|
|
(if (and export-props def)
|
|
(let ((parameters
|
|
(org-combine-plists
|
|
export-props
|
|
'(:todo-keywords t :tags t :priority t))))
|
|
(org-export-preprocess-string def parameters))
|
|
def)
|
|
;; Reference beginning position is a marker
|
|
;; to preserve it during further buffer
|
|
;; modifications.
|
|
inlinep (copy-marker pos)) ref-table)))))
|
|
;; 2. Find and remove the footnote section, if any. Also
|
|
;; determine where footnotes shall be inserted (INS-POINT).
|
|
(cond
|
|
((and org-footnote-section (eq major-mode 'org-mode))
|
|
(goto-char (point-min))
|
|
(if (re-search-forward
|
|
(concat "^\\*[ \t]+" (regexp-quote org-footnote-section)
|
|
"[ \t]*$") nil t)
|
|
(delete-region (match-beginning 0) (org-end-of-subtree t t)))
|
|
;; A new footnote section is inserted by default at the end of
|
|
;; the buffer.
|
|
(goto-char (point-max))
|
|
(skip-chars-backward " \r\t\n")
|
|
(forward-line)
|
|
(unless (bolp) (newline)))
|
|
;; No footnote section set: Footnotes will be added at the end
|
|
;; of the section containing their first reference.
|
|
((eq major-mode 'org-mode))
|
|
(t
|
|
;; Remove any left-over tag in the buffer, if one is set up.
|
|
(when org-footnote-tag-for-non-org-mode-files
|
|
(let ((tag (concat "^" (regexp-quote
|
|
org-footnote-tag-for-non-org-mode-files)
|
|
"[ \t]*$")))
|
|
(goto-char (point-min))
|
|
(while (re-search-forward tag nil t)
|
|
(replace-match "")
|
|
(delete-region (point) (progn (forward-line) (point))))))
|
|
;; In Message mode, ensure footnotes are inserted before the
|
|
;; signature.
|
|
(if (and (derived-mode-p 'message-mode)
|
|
(goto-char (point-max))
|
|
(re-search-backward message-signature-separator nil t))
|
|
(beginning-of-line)
|
|
(goto-char (point-max)))))
|
|
;; During export, `org-footnote-insert-pos-for-preprocessor' has
|
|
;; precedence over previously found position.
|
|
(setq ins-point
|
|
(copy-marker
|
|
(if (and export-props
|
|
(eq org-footnote-insert-pos-for-preprocessor 'point-min))
|
|
(point-min)
|
|
(point))))
|
|
;; 3. Clean-up REF-TABLE.
|
|
(setq ref-table
|
|
(delq nil
|
|
(mapcar
|
|
(lambda (x)
|
|
(cond
|
|
;; When only sorting, ignore inline footnotes.
|
|
;; Also clear position marker.
|
|
((and sort-only (nth 3 x))
|
|
(set-marker (nth 4 x) nil) nil)
|
|
;; No definition available: provide one.
|
|
((not (nth 2 x))
|
|
(append
|
|
(list (car x) (nth 1 x)
|
|
(format "DEFINITION NOT FOUND: %s" (car x)))
|
|
(nthcdr 3 x)))
|
|
(t x)))
|
|
ref-table)))
|
|
(setq ref-table (nreverse ref-table))
|
|
;; 4. Remove left-over definitions in the buffer.
|
|
(mapc (lambda (x)
|
|
(unless (nth 3 x) (org-footnote-delete-definitions (car x))))
|
|
ref-table)
|
|
;; 5. Insert the footnotes again in the buffer, at the
|
|
;; appropriate spot.
|
|
(goto-char ins-point)
|
|
(cond
|
|
;; No footnote: exit.
|
|
((not ref-table))
|
|
;; Cases when footnotes should be inserted in one place.
|
|
((or (not (eq major-mode 'org-mode))
|
|
org-footnote-section
|
|
export-props)
|
|
;; Insert again the section title, if any. Ensure that title,
|
|
;; or the subsequent footnotes, will be separated by a blank
|
|
;; lines from the rest of the document. In an Org buffer,
|
|
;; separate section with a blank line, unless explicitly
|
|
;; stated in `org-blank-before-new-entry'.
|
|
(cond
|
|
((not (eq major-mode 'org-mode))
|
|
(skip-chars-backward " \t\n\r")
|
|
(delete-region (point) ins-point)
|
|
(unless (bolp) (newline))
|
|
(when org-footnote-tag-for-non-org-mode-files
|
|
(insert "\n" org-footnote-tag-for-non-org-mode-files "\n")))
|
|
((and org-footnote-section (not export-props))
|
|
(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")))
|
|
(set-marker ins-point nil)
|
|
;; Insert the footnotes, separated by a blank line.
|
|
(insert
|
|
(mapconcat
|
|
(lambda (x)
|
|
;; Clean markers.
|
|
(set-marker (nth 4 x) nil)
|
|
(format "\n[%s] %s" (nth (if sort-only 0 1) x) (nth 2 x)))
|
|
ref-table "\n"))
|
|
(unless (eobp) (insert "\n\n"))
|
|
;; When exporting, add newly inserted markers along with their
|
|
;; associated definition to `org-export-footnotes-seen'.
|
|
(when export-props (setq org-export-footnotes-seen ref-table)))
|
|
;; Each footnote definition has to be inserted at the end of
|
|
;; the section where its first reference belongs.
|
|
(t
|
|
(mapc
|
|
(lambda (x)
|
|
(let ((pos (nth 4 x)))
|
|
(goto-char pos)
|
|
;; Clean marker.
|
|
(set-marker pos nil))
|
|
(org-footnote-goto-local-insertion-point)
|
|
(insert (format "\n[%s] %s\n"
|
|
(if sort-only (car x) (nth 1 x))
|
|
(nth 2 x))))
|
|
ref-table))))))
|
|
|
|
(defun org-footnote-goto-local-insertion-point ()
|
|
"Find insertion point for footnote, just before next outline heading."
|
|
(org-with-limited-levels (outline-next-heading))
|
|
(or (bolp) (newline))
|
|
(beginning-of-line 0)
|
|
(while (and (not (bobp)) (= (char-after) ?#))
|
|
(beginning-of-line 0))
|
|
(if (looking-at "[ \t]*#\\+TBLFM:") (beginning-of-line 2))
|
|
(end-of-line 1)
|
|
(skip-chars-backward "\n\r\t ")
|
|
(forward-line))
|
|
|
|
(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))
|
|
(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 (concat "^\\[" (regexp-quote label) "\\]"))
|
|
(ndef 0))
|
|
(while (re-search-forward def-re nil t)
|
|
(let ((full-def (org-footnote-at-definition-p)))
|
|
(delete-region (nth 1 full-def) (nth 2 full-def)))
|
|
(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
|
|
(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))))
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|
;; Footnote definition at point.
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|
((setq x (org-footnote-at-definition-p))
|
|
(car x))
|
|
(t (error "Don't know which footnote to remove")))))
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|
;; 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))
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|
;; 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))))
|
|
|
|
(defun org-footnote-renumber-fn:N ()
|
|
"Renumber the simple footnotes like fn:17 into a sequence in the document."
|
|
(interactive)
|
|
(let (map (n 0))
|
|
(org-with-wide-buffer
|
|
(goto-char (point-min))
|
|
(while (re-search-forward "\\[fn:\\([0-9]+\\)[]:]" nil t)
|
|
(save-excursion
|
|
(goto-char (match-beginning 0))
|
|
;; Ensure match is a footnote reference or definition.
|
|
(when (save-match-data (if (bolp)
|
|
(org-footnote-at-definition-p)
|
|
(org-footnote-at-reference-p)))
|
|
(let ((new-val (or (cdr (assoc (match-string 1) map))
|
|
(number-to-string (incf n)))))
|
|
(unless (assoc (match-string 1) map)
|
|
(push (cons (match-string 1) new-val) map))
|
|
(replace-match new-val nil nil nil 1))))))))
|
|
|
|
(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-normalize 'sort)
|
|
(when label
|
|
(goto-char (point-min))
|
|
(and (re-search-forward (concat "^\\[" (regexp-quote label) "\\]")
|
|
nil t)
|
|
(progn (insert " ")
|
|
(just-one-space)))))))
|
|
|
|
(provide 'org-footnote)
|
|
|
|
;;; org-footnote.el ends here
|