From: Eli Zaretskii <eliz@gnu.org>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: "... the window start at a meaningless point within a line."
Date: Sun, 18 Oct 2015 20:44:46 +0300 [thread overview]
Message-ID: <83lhb0hy0h.fsf@gnu.org> (raw)
In-Reply-To: <20151018150052.GD1639@acm.fritz.box>
> Date: Sun, 18 Oct 2015 15:00:52 +0000
> Cc: emacs-devel@gnu.org
> From: Alan Mackenzie <acm@muc.de>
>
> > Another idea: did you try augmenting the X coordinate of the iterator
> > after it gets back to point at the beginning of Fvertical_motion?
> > IOW, after this line:
>
> > move_it_to (&it,
> > (!disp_string_at_start_p
> > || FETCH_BYTE (IT_BYTEPOS (it)) == '\n')
> > ? PT
> > : PT - 1,
> > -1, -1, -1, MOVE_TO_POS);
>
> > modify it.current_x such that it's relative to the "actual"
> > window-start. Then let Fvertical_motion do its job as usual. Did you
> > try that?
>
> No, I haven't. But I don't think it could work. After anchoring `it'
> at "actual" WS, it would have to move up or down. Any time the iterator
> is moved to a previous line, it re-anchors itself at a previous _xdisp_
> BOL then moves forward, losing the relationship with WS.
>
> So this idea might work with nlines > 0, but couldn't work with nlines
> <= 0.
One bird at a time, okay? Could you please see if this idea works
with nlines > 0? If it does, it significantly simplifies the
solution, because we could do something very similar for moving
backward, i.e. apply the correction after each move to a previous
line.
Thanks.
next prev parent reply other threads:[~2015-10-18 17:44 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 20:45 "... the window start at a meaningless point within a line." Alan Mackenzie
2015-10-01 8:48 ` Eli Zaretskii
2015-10-01 9:41 ` Alan Mackenzie
2015-10-01 10:16 ` Eli Zaretskii
2015-10-01 11:02 ` Alan Mackenzie
2015-10-01 12:03 ` Eli Zaretskii
2015-10-01 16:35 ` Alan Mackenzie
2015-10-15 18:16 ` Alan Mackenzie
2015-10-15 20:14 ` Eli Zaretskii
2015-10-16 9:55 ` Alan Mackenzie
2015-10-16 10:19 ` Eli Zaretskii
2015-10-16 15:19 ` Alan Mackenzie
2015-10-16 17:26 ` Eli Zaretskii
2015-10-16 20:46 ` David Kastrup
2015-10-17 7:15 ` Eli Zaretskii
2015-10-17 7:56 ` David Kastrup
2015-10-16 21:14 ` Alan Mackenzie
2015-10-16 17:35 ` Eli Zaretskii
2015-10-16 18:12 ` Alan Mackenzie
2015-10-16 18:23 ` Eli Zaretskii
2015-10-16 18:36 ` Eli Zaretskii
2015-10-16 20:12 ` Alan Mackenzie
2015-10-17 8:33 ` Eli Zaretskii
2015-10-17 11:57 ` Alan Mackenzie
2015-10-17 12:34 ` Eli Zaretskii
2015-10-17 13:31 ` Eli Zaretskii
2015-10-17 14:22 ` Eli Zaretskii
2015-10-18 15:00 ` Alan Mackenzie
2015-10-18 17:44 ` Eli Zaretskii [this message]
2015-10-19 10:27 ` Alan Mackenzie
2015-10-27 13:40 ` Alan Mackenzie
2015-10-27 17:35 ` Alan Mackenzie
2015-10-27 18:33 ` Eli Zaretskii
2015-10-27 18:23 ` Eli Zaretskii
2015-10-28 8:58 ` Alan Mackenzie
2015-10-28 13:15 ` Alan Mackenzie
2015-10-31 13:21 ` Eli Zaretskii
2015-10-31 21:17 ` Alan Mackenzie
2015-11-01 3:40 ` Eli Zaretskii
2015-11-01 14:45 ` Alan Mackenzie
2015-11-01 15:23 ` Alan Mackenzie
2015-11-01 17:45 ` Eli Zaretskii
2015-11-01 18:07 ` Eli Zaretskii
2015-11-01 18:46 ` Alan Mackenzie
2015-10-18 14:53 ` Alan Mackenzie
2015-10-18 17:46 ` Eli Zaretskii
2015-10-19 10:45 ` Alan Mackenzie
2015-10-19 10:56 ` Eli Zaretskii
2015-10-19 11:24 ` Alan Mackenzie
2015-10-19 11:28 ` Eli Zaretskii
2015-10-19 12:02 ` Alan Mackenzie
2015-10-19 12:33 ` Eli Zaretskii
2015-10-19 13:11 ` Alan Mackenzie
2015-10-19 13:27 ` Eli Zaretskii
2015-10-19 19:15 ` Alan Mackenzie
2015-10-27 13:46 ` Alan Mackenzie
2015-10-17 15:30 ` Alan Mackenzie
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