bug#18197: 24.3.92; Get rid of ellipsis at beginning of window

bug#18197: 24.3.92; Get rid of ellipsis at beginning of window

[Nicolas Richard]

I'm not sure this is a bug, or simply a feature that annoys me. I'm
sorry if I picked the wrong mailing list.

When running the following
emacs -Q /tmp/foo.outline -f outline-mode -f end-of-buffer --eval '(forward-line -2)' -f hide-body

with /tmp/foo.outline containing:
,----
| * foo
| <a screenful of lines that do not start by a '*'>
| * bar
`----

My window then looks like:
,----
| ...
| * bar
`----
When I hit M-<, my window will look like:
,----
| * foo...
| * bar
`----

I would expect the screen to not go through the intermediate state with
an ellipsis at the beginning of the window.

If this is not a bug, what is a workaround ? The best I came up with is :

(let ((ws (window-start)))
  (save-excursion
    (goto-char ws)
    (skip-chars-backward "^\n")
    (while (and (not (bobp)) (invisible-p (1- (point))))
      (goto-char (previous-char-property-change (point)))
      (skip-chars-backward "^\n"))
    (redisplay)))

(the code to skip invisible text comes from move-beginning-of-line).

Thanks,

In GNU Emacs 24.3.92.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2014-07-11 on geodiff-mac3
Windowing system distributor `The X.Org Foundation', version 11.0.11304000
System Description:	Gentoo Base System release 2.2

Configured using:
 `configure --with-x-toolkit=lucid --enable-checking 'CFLAGS= -O0 -g3''

-- 
Nico.

bug#18197: 24.3.92; Get rid of ellipsis at beginning of window

[Nicolas Richard]

Hello,

TL;DR: Ping?

FWIW, this bug came from the Org mode ML, see
http://lists.gnu.org/archive/html/emacs-orgmode/2014-11/msg00795.html
but can be reproduced with outline-mode only (which is what I did in the
recipe).

I still don't have a good solution for this problem. My best idea is
something along the lines of

(defun fix-ellipsis ()
  (let ((ws (window-start)))
    (save-excursion
      (goto-char ws)
      (skip-chars-backward "^\n")
      (while (and (not (bobp)) (invisible-p (1- (point))))
        (goto-char (previous-char-property-change (point)))
        (skip-chars-backward "^\n"))
      (redisplay))))
(add-hook 'post-command-hook 'fix-ellipsis)

which is awful.

Does someone know if this is actually a bug or just me having weird
expectations ?

TIA,

-- 
Nicolas Richard

bug#18197: 24.3.92; Get rid of ellipsis at beginning of window

[Eli Zaretskii]

> From: Nicolas Richard <theonewiththeevillook@yahoo.fr>
> Date: Mon, 12 Jan 2015 14:34:48 +0100
> Cc: 18197@debbugs.gnu.org
> 
> Does someone know if this is actually a bug or just me having weird
> expectations ?

It's not a bug, in the sense that the code does what it was supposed
to do in this situation.  IOW, no one coded any special treatment for
this situation, AFAIK.

bug#18197: 24.3.92; Get rid of ellipsis at beginning of window

[Eli Zaretskii]

> From: Marcin Borkowski <mbork@mbork.pl>
> Date: Wed, 17 Feb 2016 16:28:06 +0100
> 
> On 2015-01-12, at 18:22, Eli Zaretskii <eliz@gnu.org> wrote:
> 
> >> From: Nicolas Richard <theonewiththeevillook@yahoo.fr>
> >> Date: Mon, 12 Jan 2015 14:34:48 +0100
> >> Cc: 18197@debbugs.gnu.org
> >> 
> >> Does someone know if this is actually a bug or just me having weird
> >> expectations ?
> >
> > It's not a bug, in the sense that the code does what it was supposed
> > to do in this situation.  IOW, no one coded any special treatment for
> > this situation, AFAIK.
> 
> Hi all,
> 
> does the above mean that this bug should be closed?

I think it should become wishlist.

bug#18197: change to wishlist as per Eli's suggestion

[Marcin Borkowski]

severity 18197 wishlist

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University