From: Keith David Bershatsky <esq@lawlist.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Distinguishing: Temporary v. Semi-Permanent -- Horizontal Scrolling
Date: Mon, 02 Jul 2018 19:44:36 -0700 [thread overview]
Message-ID: <m2muv9vy0b.wl%esq@lawlist.com> (raw)
As far as I am aware, there are four (4) basic situations that I need to be aware of in terms of horizontal scrolling:
1a. Temporary Horizontal Scrolling: (scroll-left 1)
1b. Current line is horizontally scrolled the same as all other lines.
2a. Temporary Horizontal Scrolling: (scroll-left 1)
2b. Current line is horizontally scrolled _differently_ than all other lines.
2c. Assumes (setq-local auto-hscroll-mode 'current-line)
3a. Semi-permanent Horizontal Scrolling: (scroll-left 1 t)
3b. Current line is horizontally scrolled the same as all other lines.
4a. Semi-permanent Horizontal Scrolling: (scroll-left 1 t)
4b. Current line is horizontally scrolled _differently_ than all other lines.
4c. Assumes (setq-local auto-hscroll-mode 'current-line)
In a previous post, you taught me that (it->w->min_hscroll > 0) tells us that semi-permanent horizontal scrolling is in effect.
I have been using the following hscl test for the 2nd situation above:
bool hscl = (!it->w->suspend_auto_hscroll
&& EQ (Fbuffer_local_value (Qauto_hscroll_mode, buf), Qcurrent_line)
&& it->w->hscroll > 0);
The hscl test is _true_ for the 2nd, 3rd and 4th situations above. Thus, the hscl test does not help us distinguish between the 3rd and 4th situations above.
Q: In addition to (it->w->min_hscroll > 0), what test will help us distinguish between the 3rd and 4th situations above?
next reply other threads:[~2018-07-03 2:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-03 2:44 Keith David Bershatsky [this message]
2018-07-03 19:29 ` Distinguishing: Temporary v. Semi-Permanent -- Horizontal Scrolling Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2018-07-04 13:56 Keith David Bershatsky
2018-07-03 20:20 Keith David Bershatsky
2018-07-04 2:33 ` Eli Zaretskii
2018-06-24 17:31 Keith David Bershatsky
2018-06-24 16:16 Keith David Bershatsky
2018-06-24 16:40 ` Eli Zaretskii
2018-06-24 3:49 Keith David Bershatsky
2018-06-24 14:26 ` Eli Zaretskii
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