在 Emacs org-mode 中，有没有办法让内联脚注定义显示为折叠？
例如，像这样的一行：
This effect is due to the strength of weak ties[fn:: Newman, Mark, Albert-László Barabási, and Duncan J. Watts. 2006. The Structure and Dynamics of Networks. Princeton, NJ: Princeton University Press].
可能看起来像这样：
This effect is due to the strength of weak ties[✭].
必要时我还需要一个命令来显示脚注。所以也许需要的是两个命令：org-hide-footnotes和org-show-footnotes.
我不相信目前这是可能的。也TAB用作其中的扩展键可能会导致键的更多重载。
另一方面，有什么特别的理由不为脚注使用脚注部分吗？
C-c C-x f将创建/与您拥有的任何脚注进行交互。
(org-footnote-action & optional SPECIAL)
为脚注做正确的事情。
在脚注引用时，跳转到定义。
在定义时，如果存在引用，则跳转到引用，否则请提供创建它们。
当既不是定义也不是参考时，以交互方式创建一个新的脚注。
使用前缀 arg SPECIAL，在菜单中提供附加命令。
附加命令是：
s Sort the footnote definitions by reference sequence. During editing,
Org makes no effort to sort footnote definitions into a particular
sequence. If you want them sorted, use this command, which will
also move entries according to org-footnote-section. Automatic
sorting after each insertion/deletion can be configured using the
variable org-footnote-auto-adjust.
r Renumber the simple fn:N footnotes. Automatic renumbering
after each insertion/deletion can be configured using the variable
org-footnote-auto-adjust.
S Short for first r, then s action.
n Normalize the footnotes by collecting all definitions (including
inline definitions) into a special section, and then numbering them
in sequence. The references will then also be numbers. This is
meant to be the final step before finishing a document (e.g., sending
off an email). The exporters do this automatically, and so could
something like message-send-hook.
d Delete the footnote at point, and all definitions of and references
to it.
初始（2014 年 2 月 6 日）：第一个工作草案。
编辑2014 年 2 月 18 日：修改了函数lawlist-toggle-block-visibility，使其包含正确的 if/then/else 语句 - 即，如果该行包含必要的开始区域正则表达式，则将切换块可见性，否则会显示一条消息 sorry 。. . . 为代码折叠添加了对相关线程的引用。修改了错误消息以引用点而不是线。
以下答案的源代码也存储在 Github 上： https ://github.com/lawlist/lawlist-org-block-toggle/blob/master/lawlist-org-block-toggle.el
关于相关问题（即完全隐藏包含单词的属性抽屉:PROPERTIES:），请参考以下线程： 完全隐藏 :PROPERTIES: org-mode 中的抽屉
关于半相关问题（即，创建要折叠代码的自定义块），另请参阅： https ://tex.stackexchange.com/a/161196/26911
此解决方案已使用相当新版本的 Emacs Trunk（构建于 2014 年 1 月 19 日）进行了测试，其中包含 org-mode 版本 8.2.5c。由于:PROPERTIES:抽屉通过其:END:与脚注和 html 块分开折叠，因此该解决方案设想脚注和/或 html 代码块不会位于该属性抽屉内的任何位置。脚注可以出现在文本段落的任何位置，但不能在脚注内有另一对方括号——因为此代码查找第一个结束方括号以标记折叠区域的结束。此代码考虑了这一点，#+BEGIN_HTML并且#+END_HTML都将是左对齐的与左边距。启动视图仍然以相同的方式工作——例如，变量org-startup-folded和org-hide-block-startup.
的修改为org-cycle-internal-localorg-mode 中的所有折叠形式启用选项卡循环。我们所做的只是修复函数的分页以使其更具可读性，并添加以下条件： ((eq org-cycle-subtree-status 'subtree) (org-show-subtree) (message "ALL") (setq org-cycle-subtree-status 'all)). 交互功能org-cycle仍用于在所有各种折叠/展开视图之间进行选项卡循环。该功能lawlist-block-org-cycle-internal-local是由 . 使用的非交互式支持功能org-cycle。此解决方案中的两defalias部分代码是一切正常工作所必需的。除了使用制表符循环，用户还可以直接在标题或子标题的开头调用交互功能： M-x org-cycle RET
要直接切换脚注或 html 块的可见性，我们使用交互功能lawlist-toggle-block-visibility。将光标放在包含脚注开头或html块 开头的行上的任意位置，然后键入：M-x lawlist-toggle-block-visibility RET
(require 'org)
(defalias 'org-cycle-hide-drawers 'lawlist-block-org-cycle-hide-drawers)
(defun lawlist-block-org-cycle-hide-drawers (state)
"Re-hide all drawers, footnotes or html blocks after a visibility state change."
(when
(and
(derived-mode-p 'org-mode)
(not (memq state '(overview folded contents))))
(save-excursion
(let* (
(globalp (memq state '(contents all)))
(beg (if globalp (point-min) (point)))
(end
(cond
(globalp
(point-max))
((eq state 'children)
(save-excursion (outline-next-heading) (point)))
(t (org-end-of-subtree t)) )))
(goto-char beg)
(while
(re-search-forward
".*\\[fn\\|^\\#\\+BEGIN_HTML.*$\\|^[ \t]*:PROPERTIES:[ \t]*$" end t)
(lawlist-org-flag t))))))
(defalias 'org-cycle-internal-local 'lawlist-block-org-cycle-internal-local)
(defun lawlist-block-org-cycle-internal-local ()
"Do the local cycling action."
(let ((goal-column 0) eoh eol eos has-children children-skipped struct)
(save-excursion
(if (org-at-item-p)
(progn
(beginning-of-line)
(setq struct (org-list-struct))
(setq eoh (point-at-eol))
(setq eos (org-list-get-item-end-before-blank (point) struct))
(setq has-children (org-list-has-child-p (point) struct)))
(org-back-to-heading)
(setq eoh (save-excursion (outline-end-of-heading) (point)))
(setq eos (save-excursion (1- (org-end-of-subtree t t))))
(setq has-children
(or
(save-excursion
(let ((level (funcall outline-level)))
(outline-next-heading)
(and
(org-at-heading-p t)
(> (funcall outline-level) level))))
(save-excursion
(org-list-search-forward (org-item-beginning-re) eos t)))))
(beginning-of-line 2)
(if (featurep 'xemacs)
(while
(and
(not (eobp))
(get-char-property (1- (point)) 'invisible))
(beginning-of-line 2))
(while
(and
(not (eobp))
(get-char-property (1- (point)) 'invisible))
(goto-char (next-single-char-property-change (point) 'invisible))
(and
(eolp)
(beginning-of-line 2))))
(setq eol (point)))
(cond
((= eos eoh)
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-pre-cycle-hook 'empty))
(org-unlogged-message "EMPTY ENTRY")
(setq org-cycle-subtree-status nil)
(save-excursion
(goto-char eos)
(outline-next-heading)
(if (outline-invisible-p)
(org-flag-heading nil))))
((and
(or
(>= eol eos)
(not (string-match "\\S-" (buffer-substring eol eos))))
(or
has-children
(not (setq children-skipped
org-cycle-skip-children-state-if-no-children))))
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-pre-cycle-hook 'children))
(if (org-at-item-p)
;; then
(org-list-set-item-visibility (point-at-bol) struct 'children)
;; else
(org-show-entry)
(org-with-limited-levels (show-children))
(when (eq org-cycle-include-plain-lists 'integrate)
(save-excursion
(org-back-to-heading)
(while (org-list-search-forward (org-item-beginning-re) eos t)
(beginning-of-line 1)
(let* (
(struct (org-list-struct))
(prevs (org-list-prevs-alist struct))
(end (org-list-get-bottom-point struct)))
(mapc (lambda (e) (org-list-set-item-visibility e struct 'folded))
(org-list-get-all-items (point) struct prevs))
(goto-char (if (< end eos) end eos)))))))
(org-unlogged-message "CHILDREN")
(save-excursion
(goto-char eos)
(outline-next-heading)
(if (outline-invisible-p)
(org-flag-heading nil)))
(setq org-cycle-subtree-status 'children)
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-cycle-hook 'children)))
((or
children-skipped
(and
(eq last-command this-command)
(eq org-cycle-subtree-status 'children)))
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-pre-cycle-hook 'subtree))
(outline-flag-region eoh eos nil)
(org-unlogged-message
(if children-skipped
"SUBTREE (NO CHILDREN)"
"SUBTREE"))
(setq org-cycle-subtree-status 'subtree)
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-cycle-hook 'subtree)))
((eq org-cycle-subtree-status 'subtree)
(org-show-subtree)
(message "ALL")
(setq org-cycle-subtree-status 'all))
(t
(run-hook-with-args 'org-pre-cycle-hook 'folded)
(outline-flag-region eoh eos t)
(org-unlogged-message "FOLDED")
(setq org-cycle-subtree-status 'folded)
(unless (org-before-first-heading-p)
(run-hook-with-args 'org-cycle-hook 'folded))))))
(defun lawlist-org-flag (flag)
"When FLAG is non-nil, hide any of the following: html code block;
footnote; or, the properties drawer. Otherwise make it visible."
(save-excursion
(beginning-of-line 1)
(cond
((looking-at ".*\\[fn")
(let* (
(begin (match-end 0))
end-footnote)
(if (re-search-forward "\\]"
(save-excursion (outline-next-heading) (point)) t)
(progn
(setq end-footnote (point))
(outline-flag-region begin end-footnote flag))
(user-error "Error beginning at point %s." begin))))
((looking-at "^\\#\\+BEGIN_HTML.*$\\|^[ \t]*:PROPERTIES:[ \t]*$")
(let* ((begin (match-end 0)))
(if (re-search-forward "^\\#\\+END_HTML.*$\\|^[ \t]*:END:"
(save-excursion (outline-next-heading) (point)) t)
(outline-flag-region begin (point-at-eol) flag)
(user-error "Error beginning at point %s." begin)))))))
(defun lawlist-toggle-block-visibility ()
"For this function to work, the cursor must be on the same line as the regexp."
(interactive)
(if
(save-excursion
(beginning-of-line 1)
(looking-at
".*\\[fn\\|^\\#\\+BEGIN_HTML.*$\\|^[ \t]*:PROPERTIES:[ \t]*$"))
(lawlist-org-flag (not (get-char-property (match-end 0) 'invisible)))
(message "Sorry, you are not on a line containing the beginning regexp.")))