Re: Speed commands

From: Dan Davison <davison@stats.ox.ac.uk>
To: Carsten Dominik <dominik@uva.nl>
Cc: Emacs-orgmode mailing list <emacs-orgmode@gnu.org>
Subject: Re: Speed commands
Date: Sat, 14 Nov 2009 21:44:02 -0500	[thread overview]
Message-ID: <87pr7k1p8t.fsf@stats.ox.ac.uk> (raw)
In-Reply-To: <87eio14s0y.fsf@stats.ox.ac.uk> (Dan Davison's message of "Sat, 14 Nov 2009 00:03:25 -0500")

Dan Davison <davison@stats.ox.ac.uk> writes:

> Carsten Dominik <dominik@uva.nl> writes:
>
> <...>
>> I am happy to have a discussion what additional
>> commands should be present by default.
>
> I thought a speed command for scrolling through an org document might be
> good -- move from heading to heading, displaying the next entry while
> keeping all others hidden, and close subtrees as you leave them.

Here are simplified versions of the forward- and backward-scroll speed
commands that I'm suggesting.

---------------------------------------------------------
(defun ded/org-show-next-heading-tidily ()
  "Show next entry, keeping other entries closed."
  (if (save-excursion (end-of-line) (outline-invisible-p))
      (progn (org-show-entry) (show-children))
    (outline-next-heading)
    (unless (and (bolp) (org-on-heading-p))
      (org-up-heading-safe)
      (hide-subtree)
      (error "Boundary reached"))
    (org-overview)
    (org-reveal t)
    (org-show-entry)
    (show-children)))

(defun ded/org-show-previous-heading-tidily ()
  "Show previous entry, keeping other entries closed."
  (let ((pos (point)))
    (outline-previous-heading)
    (unless (and (< (point) pos) (bolp) (org-on-heading-p))
      (goto-char pos)
      (hide-subtree)
      (error "Boundary reached"))
    (org-overview)
    (org-reveal t)
    (org-show-entry)
    (show-children)))

(setq org-use-speed-commands t)
(add-to-list 'org-speed-commands-user
             '("n" ded/org-show-next-heading-tidily))
(add-to-list 'org-speed-commands-user 
             '("p" ded/org-show-previous-heading-tidily))
---------------------------------------------------------

Dan

> Or is
> there already an org command that does something like this?

>
> (Try starting with everything closed.)
>
> --------------------------------------------------------------
> (defun ded/org-show-next-heading-tidily ()
>   "Show next entry, keeping other entries closed."
>   (if (save-excursion (end-of-line) (outline-invisible-p))
>       (org-cycle)
>     (let ((level (org-current-level)))
>       (unless (org-heading-has-child-p) (org-cycle))
>       (outline-next-heading)
>       (if (< (org-current-level) level)
>           (save-excursion
>             (outline-backward-same-level 1)
>             (org-cycle)))
>       (if (and (bolp) (org-on-heading-p))
>           (org-cycle)
>         (outline-up-heading 1 t)
>         (org-cycle)
>         (error "Boundary reached")))))
>
> (setq org-use-speed-commands t)
> (add-to-list 'org-speed-commands-user 
>              '("s" ded/org-show-next-heading-tidily))
> --------------------------------------------------------------
>
> (<space> might be quite natural for this one, it seems to get used for
> scrolling e.g. in dired and gnus)
>
> Dan
>
>
>>
>> - Carsten
>>
>>
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>
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