From: Yuan Fu <casouri@gmail.com>
To: 41198@debbugs.gnu.org
Subject: bug#41198: 27.0.60; [PATCH] heading cycling command for outline
Date: Mon, 11 May 2020 21:52:25 -0400 [thread overview]
Message-ID: <452A6049-893A-4E7E-8349-541D276FAD19@gmail.com> (raw)
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Add two commands that cycles a heading (like that in Org mode) in outline-mode:
- outline-cycle: cycles between “hide all”, “sub headings” and “show all” state. They are called “FOLDED”, “CHILDREN”, “SUBTREE” in Org mode.
- outline-cycle-buffer: cycles between “only top level headings”, “all headings”, “show all” states
Could this be useful?
Yuan
[-- Attachment #2: outline.patch --]
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diff --git a/lisp/outline.el b/lisp/outline.el
index 28ea8a86e6..99a24deed0 100644
--- a/lisp/outline.el
+++ b/lisp/outline.el
@@ -1118,6 +1118,77 @@ outline-headers-as-kill
(insert "\n\n"))))))
(kill-new (buffer-string)))))))
+(defun outline--cycle-state ()
+ "Return the cycle state of current heading.
+Return either 'hide-all, 'headings-only, or 'show-all."
+ (save-excursion
+ (let (start end ov-list heading-end)
+ (outline-back-to-heading)
+ (setq start (point))
+ (outline-end-of-heading)
+ (setq heading-end (point))
+ (outline-end-of-subtree)
+ (setq end (point))
+ (setq ov-list (cl-remove-if-not
+ (lambda (o) (eq (overlay-get o 'invisible) 'outline))
+ (overlays-in start end)))
+ (cond ((eq ov-list nil) 'show-all)
+ ;; (eq (length ov-list) 1) wouldn’t work: what if there is
+ ;; one folded subheading?
+ ((and (eq (overlay-end (car ov-list)) end)
+ (eq (overlay-start (car ov-list)) heading-end))
+ 'hide-all)
+ (t 'headings-only)))))
+
+(defun outline-has-subheading-p ()
+ "Return t if this heading has subheadings, nil otherwise."
+ (save-excursion
+ (outline-back-to-heading)
+ (< (save-excursion (outline-next-heading) (point))
+ (save-excursion (outline-end-of-subtree) (point)))))
+
+(defun outline-cycle ()
+ "Cycle between “hide all”, “headings only” and “show all”.
+
+“Hide all” means hide all subheadings and their bodies.
+“Headings only” means show sub headings but not their bodies.
+“Show all” means show all subheadings and their bodies."
+ (interactive)
+ (pcase (outline--cycle-state)
+ ('hide-all (if (outline-has-subheading-p)
+ (progn (outline-show-children)
+ (message "Only headings"))
+ (outline-show-subtree)
+ (message "Show all")))
+ ('headings-only (outline-show-subtree)
+ (message "Show all"))
+ ('show-all (outline-hide-subtree)
+ (message "Hide all"))))
+
+(defvar-local outline--cycle-buffer-state 'show-all
+ "Interval variable used for tracking buffer cycle state.")
+
+(defun outline-cycle-buffer ()
+ "Cycle the whole buffer like in ‘outline-cycle’."
+ (interactive)
+ (pcase outline--cycle-buffer-state
+ ('show-all (save-excursion
+ (let ((start-point (point)))
+ (while (not (eq (point) start-point))
+ (outline-up-heading 1))
+ (outline-hide-sublevels
+ (progn (outline-back-to-heading)
+ (funcall 'outline-level)))))
+ (setq outline--cycle-buffer-state 'top-level)
+ (message "Top level headings"))
+ ('top-level (outline-show-all)
+ (outline-hide-region-body (point-min) (point-max))
+ (setq outline--cycle-buffer-state 'all-heading)
+ (message "All headings"))
+ ('all-heading (outline-show-all)
+ (setq outline--cycle-buffer-state 'show-all)
+ (message "Show all"))))
+
(provide 'outline)
(provide 'noutline)
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next reply other threads:[~2020-05-12 1:52 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-12 1:52 Yuan Fu [this message]
2020-05-19 2:45 ` bug#41130: bug#41198: 27.0.60; [PATCH] heading cycling command for outline Stefan Kangas
2020-05-19 18:31 ` Yuan Fu
2020-05-19 22:36 ` Stefan Kangas
2020-05-20 1:37 ` Yuan Fu
2020-05-07 20:53 ` bug#41130: outline-mode: Add new commands like org-cycle and org=global-cycle Stefan Kangas
2020-05-07 21:03 ` Stefan Kangas
2020-05-12 22:52 ` Juri Linkov
2020-05-19 3:00 ` bug#41130: outline-mode: Add new commands like org-cycle and org-global-cycle Stefan Kangas
2020-05-19 22:04 ` Juri Linkov
2020-05-24 7:29 ` Bastien
2020-05-24 14:35 ` Eli Zaretskii
2020-05-24 16:26 ` Bastien
2020-05-24 16:39 ` Eli Zaretskii
2020-05-24 17:09 ` Dmitry Gutov
2020-05-25 8:50 ` Bastien
2020-06-23 22:27 ` Basil L. Contovounesios
2020-09-06 8:22 ` Bastien
2020-05-13 7:13 ` bug#41130: outline-mode: Add new commands like org-cycle and org=global-cycle Tassilo Horn
2020-05-13 16:54 ` Robert Pluim
2020-05-13 18:51 ` Tassilo Horn
2020-05-19 3:06 ` Stefan Kangas
2020-05-20 14:12 ` bug#41130: bug#41198: 27.0.60; [PATCH] heading cycling command for outline Howard Melman
2020-05-20 21:34 ` Stefan Kangas
2020-05-24 7:26 ` bug#41130: outline-mode: Add new commands like org-cycle and org=global-cycle Bastien
2020-05-24 14:49 ` Philip K.
2020-05-24 16:30 ` Bastien
2020-08-17 22:30 ` bug#41130: outline-mode: Add new commands like org-cycle and org-global-cycle Howard Melman
2020-08-18 4:30 ` Eli Zaretskii
2020-10-13 3:16 ` bug#41130: bug#41198: 27.0.60; [PATCH] heading cycling command for outline Lars Ingebrigtsen
2020-10-13 13:16 ` bug#41198: " Yuan Fu
2020-10-14 19:24 ` Juri Linkov
2020-10-15 7:02 ` Lars Ingebrigtsen
2020-10-15 7:52 ` Robert Pluim
2020-10-15 23:33 ` bug#41198: " Yuan Fu
2020-10-16 3:12 ` Yuan Fu
2020-10-16 4:59 ` bug#41198: " Lars Ingebrigtsen
2020-10-16 8:25 ` bug#41130: " Robert Pluim
2020-10-16 8:20 ` Juri Linkov
2020-10-16 19:27 ` Yuan Fu
2020-10-17 6:36 ` Lars Ingebrigtsen
2020-10-17 20:30 ` Juri Linkov
2020-10-18 0:28 ` bug#41198: " Yuan Fu
2020-10-18 8:36 ` Lars Ingebrigtsen
2020-10-18 20:23 ` Yuan Fu
2020-10-19 8:45 ` Lars Ingebrigtsen
2020-11-15 5:50 ` bug#41198: 28.0.50; " Paul W. Rankin via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-11-16 21:59 ` Lars Ingebrigtsen
2020-11-17 2:47 ` Paul W. Rankin via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-11-24 5:09 ` Lars Ingebrigtsen
2020-11-25 19:24 ` Juri Linkov
2020-11-26 10:13 ` Lars Ingebrigtsen
2020-11-27 8:29 ` Juri Linkov
2020-11-27 18:39 ` Drew Adams
2020-11-28 1:58 ` Paul W. Rankin via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-12-10 19:08 ` Howard Melman
2020-12-12 20:57 ` Juri Linkov
2020-12-14 20:31 ` Juri Linkov
2020-12-15 0:09 ` Howard Melman
2020-12-15 3:46 ` Pankaj Jangid
2020-12-15 9:10 ` Juri Linkov
2020-12-15 10:42 ` Pankaj Jangid
2020-12-15 20:23 ` Juri Linkov
2020-12-16 4:02 ` Pankaj Jangid
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