From: Eli Zaretskii <eliz@gnu.org>
To: Dani Moncayo <dmoncayo@gmail.com>
Cc: 13055@debbugs.gnu.org
Subject: bug#13055: 24.3.50; `scroll-margin' not always honored in Info buffers
Date: Sun, 02 Dec 2012 19:33:42 +0200 [thread overview]
Message-ID: <831uf8tl3d.fsf@gnu.org> (raw)
In-Reply-To: <CAH8Pv0hK5Yjw721XW_xo2QACX6XyxgZhBjPTmozHbb3zWZrEsA@mail.gmail.com>
> Date: Sun, 2 Dec 2012 17:39:09 +0100
> From: Dani Moncayo <dmoncayo@gmail.com>
>
> >From Emacs -Q:
>
> 1. Eval: (setq scroll-margin 1)
> 2. Eval: (info "(emacs) Intro")
> 3. Type: <backspace>
>
> --> The current line is the last visible one, but that should never
> happen, since `scroll-margin' is set to 1. The current line should be
> the penultimate visible one.
Not a bug. scroll-margin is only in effect when window is _scrolled_
due to cursor motion commands. In this case, <backspace> causes the
buffer to be emptied, and an entirely different text be inserted into
it. There's no scrolling here, thus scroll-related variables are
never consulted in this case.
The Emacs User manual clearly starts the section that describes these
variables with this:
Emacs performs "automatic scrolling" when point moves out of the
visible portion of the text.
IOW, scroll-margin determines when automatic scrolling is triggered,
but not where point can be legitimately located in a window.
next prev parent reply other threads:[~2012-12-02 17:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-02 16:39 bug#13055: 24.3.50; `scroll-margin' not always honored in Info buffers Dani Moncayo
2012-12-02 17:33 ` Eli Zaretskii [this message]
2012-12-02 21:51 ` Dani Moncayo
2012-12-03 3:46 ` Eli Zaretskii
2012-12-03 7:34 ` Dani Moncayo
2012-12-03 14:53 ` Juanma Barranquero
2012-12-03 15:21 ` Dani Moncayo
2012-12-03 16:09 ` Juanma Barranquero
2012-12-03 16:27 ` Dani Moncayo
2012-12-03 17:46 ` Eli Zaretskii
2012-12-03 17:49 ` Juanma Barranquero
2012-12-03 17:42 ` martin rudalics
2012-12-03 17:52 ` Juanma Barranquero
2012-12-03 17:42 ` Eli Zaretskii
2012-12-03 19:02 ` Dani Moncayo
2012-12-03 20:58 ` Eli Zaretskii
2012-12-03 21:32 ` Dani Moncayo
2012-12-03 18:07 ` Stefan Monnier
2012-12-03 20:49 ` Eli Zaretskii
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