GNU bug report logs - #2145
23.0.90; S-SPC should scroll up in view-only buffers

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Rudi Schlatte <rudi <at> constantly.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.90; S-SPC should scroll up in view-only buffers
Date: Mon, 2 Feb 2009 09:19:56 +0800

(This should be filed as "wishlist")

Summary:

S-SPC should scroll up in view-only buffers, such as info, gnus
messages and buffers in view-mode; currently it scrolls down.

Rationale:

Most other programs that display more than a screenful of information
(Firefox, various mail clients, the evince pdf viewer, ...) use SPC to
scroll down and S-SPC (Shift-Space) to scroll up.  Emacs uses SPC (and
S-SPC) to scroll down and <backspace> to scroll up.  Additionally, in
some programs, Backspace is bound to some deleting action (in my email
reader, it moves the current message to Trash).  Paging up and down
through stuff thus requires me to be careful about which program I'm
in; I've accidentally deleted emails after reading too much stuff in
emacs.

Workarounds:

Putting the appropriate define-key forms, e.g.

(define-key view-mode-map (kbd "S-SPC") 'View-scroll-page-backward)
(define-key Info-mode-map (kbd "S-SPC") 'Info-scroll-down)

in the user's init file.

Message #12 received at 2145-done <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: 2145-done <at> debbugs.gnu.org
Subject: Re: bug#2145: 23.0.90; S-SPC should scroll up in view-only buffers
Date: Mon, 11 Feb 2013 23:48:18 -0500

Version: 24.4

Rudi Schlatte wrote:

> S-SPC should scroll up in view-only buffers, such as info, gnus
> messages and buffers in view-mode; currently it scrolls down.

Sorry for the huge delay. This seemed like a good idea to me, so I did
it in whichever relevant keymaps I could find.

Message #15 received at 2145 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: 2145 <at> debbugs.gnu.org
Cc: rgm <at> gnu.org, rudi <at> constantly.at
Subject: Re: bug#2145: 23.0.90; S-SPC should scroll up in view-only buffers
Date: Tue, 12 Feb 2013 19:42:40 +0200

>> S-SPC should scroll up in view-only buffers, such as info,
>> gnus messages and buffers in view-mode; currently it scrolls down.
>
> Sorry for the huge delay. This seemed like a good idea to me, so I did
> it in whichever relevant keymaps I could find.

To do the same for gnus messages is possible with:

(define-key gnus-summary-mode-map [?\S-\ ] 'gnus-summary-prev-page)
(define-key gnus-article-mode-map [?\S-\ ] 'gnus-article-goto-prev-page)

And this is also useful for images:

(define-key image-mode-map [?\S-\ ] 'image-scroll-down)
(define-key doc-view-mode-map [?\S-\ ] 'doc-view-scroll-down-or-previous-page)

Message #18 received at 2145 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Juri Linkov <juri <at> jurta.org>
Cc: 2145 <at> debbugs.gnu.org, rudi <at> constantly.at
Subject: Re: bug#2145: 23.0.90; S-SPC should scroll up in view-only buffers
Date: Tue, 12 Feb 2013 13:54:19 -0500

Juri Linkov wrote:

> To do the same for gnus messages is possible with:
>
> (define-key gnus-summary-mode-map [?\S-\ ] 'gnus-summary-prev-page)
> (define-key gnus-article-mode-map [?\S-\ ] 'gnus-article-goto-prev-page)
>
> And this is also useful for images:
>
> (define-key image-mode-map [?\S-\ ] 'image-scroll-down)
> (define-key doc-view-mode-map [?\S-\ ] 'doc-view-scroll-down-or-previous-page)

Please add them then.

Message #21 received at 2145 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> jurta.org>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 2145 <at> debbugs.gnu.org, rudi <at> constantly.at
Subject: Re: bug#2145: 23.0.90; S-SPC should scroll up in view-only buffers
Date: Wed, 13 Feb 2013 10:29:30 +0200

>> To do the same for gnus messages is possible with:
>>
>> (define-key gnus-summary-mode-map [?\S-\ ] 'gnus-summary-prev-page)
>> (define-key gnus-article-mode-map [?\S-\ ] 'gnus-article-goto-prev-page)
>>
>> And this is also useful for images:
>>
>> (define-key image-mode-map [?\S-\ ] 'image-scroll-down)
>> (define-key doc-view-mode-map [?\S-\ ] 'doc-view-scroll-down-or-previous-page)
>
> Please add them then.

Added with `ediff-previous-difference' as well.

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