From: Po Lu <luangruo@yahoo.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: dick.r.chiang@gmail.com, emacs-devel@gnu.org
Subject: Re: Allowing point to be outside the window?
Date: Sun, 05 Dec 2021 17:31:03 +0800 [thread overview]
Message-ID: <87a6hfqtyg.fsf@yahoo.com> (raw)
In-Reply-To: <83czmb4d50.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 05 Dec 2021 11:25:15 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
>> From: Po Lu <luangruo@yahoo.com>
>> Cc: dick.r.chiang@gmail.com, emacs-devel@gnu.org
>> Date: Sun, 05 Dec 2021 17:15:25 +0800
>>
>> >> I meant to ask whether or not I can forgo calculating whether point is
>> >> outside the window, and just test whether or not cursor.vpos is -1 to
>> >> determine if the cursor should be displayed, when point is allowed to be
>> >> outside the window.
>> >
>> > No. I think it should be the other way around: first see if point is
>> > outside of the window, then force cursor.vpos to be negative. That's
>> > because redisplay resets that value to -1 whenever it isn't sure the
>> > cursor will stay in its old position.
>>
>> Thanks. Another question or two: I can't use the value "-1" for
>> cursor.vpos to indicate that point is outside the window, as it's
>> already treated specially by redisplay, correct?
>
> No, you can't. But the question is why do you need to? -1 there
> means the cursor position is unknown. Why do you need to know more
> than that, plus the fact that point is _allowed_ to be outside of the
> window?
>
>> Also, where should I put the code to test if cursor is invisible? I
>> think it should be after the label force_start, as forcing the start
>> could potentially adjust point to be inside the window.
>
> It goes back to the same question I asked above: why do you need to
> know that point is outside of the window? for what purposes?
>
> IOW, why not just let redisplay do its thing, without bothering to
> bring point into the window, when that is allowed?
I need to erase the phys cursor and to tell display_and_set_cursor to
not draw it: otherwise, the ghost of the cursor remains on-screen even
after point is moved out.
Thanks.
next prev parent reply other threads:[~2021-12-05 9:31 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87ilwd7zaq.fsf.ref@yahoo.com>
2021-11-28 3:07 ` Allowing point to be outside the window? Po Lu
2021-11-28 8:03 ` Eli Zaretskii
2021-11-28 8:13 ` Po Lu
2021-11-28 8:41 ` Eli Zaretskii
2021-11-28 12:47 ` Po Lu
2021-11-28 12:58 ` Eli Zaretskii
2021-11-28 13:10 ` Po Lu
2021-11-28 13:44 ` Eli Zaretskii
2021-11-29 1:47 ` Po Lu
2021-11-29 13:00 ` Eli Zaretskii
2021-11-29 13:22 ` Po Lu
2021-11-29 13:43 ` Eli Zaretskii
2021-11-30 1:40 ` Po Lu
2021-11-30 16:49 ` [External] : " Drew Adams
2021-11-30 17:26 ` Eli Zaretskii
2021-11-30 18:10 ` Lars Ingebrigtsen
2021-11-30 18:32 ` Eli Zaretskii
2021-11-30 18:49 ` Stefan Kangas
2021-11-30 19:21 ` Eli Zaretskii
2021-11-30 20:57 ` Drew Adams
2021-11-30 23:41 ` Daniel Martín
2021-12-01 8:30 ` martin rudalics
2021-12-01 9:10 ` Juri Linkov
2021-11-30 23:20 ` Stefan Monnier
2021-12-04 11:18 ` Po Lu
2021-12-04 12:55 ` Eli Zaretskii
2021-12-04 13:13 ` Po Lu
2021-12-04 16:24 ` Eli Zaretskii
2021-12-05 0:40 ` Po Lu
2021-12-04 17:15 ` Eli Zaretskii
2021-12-05 0:45 ` Po Lu
2021-12-05 9:03 ` Eli Zaretskii
2021-12-06 2:11 ` Po Lu
2021-12-06 14:13 ` Eli Zaretskii
2021-12-07 2:18 ` Po Lu
2021-12-07 13:42 ` Eli Zaretskii
2021-12-08 1:17 ` Po Lu
2021-12-08 17:14 ` Eli Zaretskii
2021-12-09 0:23 ` Po Lu
2021-12-09 8:02 ` Eli Zaretskii
2021-12-09 9:22 ` Po Lu
2021-12-09 10:02 ` Eli Zaretskii
2021-12-25 6:45 ` Po Lu
2021-12-25 7:07 ` Eli Zaretskii
2022-02-06 7:22 ` Po Lu
2022-02-06 11:34 ` Eli Zaretskii
2022-02-06 11:46 ` Po Lu
2022-02-06 11:55 ` Eli Zaretskii
2022-02-06 12:21 ` Po Lu
2022-02-06 16:15 ` Eli Zaretskii
2022-02-07 1:21 ` Po Lu
2022-02-07 7:21 ` Po Lu
2022-02-07 13:41 ` Eli Zaretskii
2022-02-07 13:57 ` Po Lu
2022-02-07 14:24 ` Eli Zaretskii
2022-02-08 0:58 ` Po Lu
2022-02-08 17:08 ` Eli Zaretskii
2022-02-09 1:57 ` Po Lu
2022-02-10 13:04 ` Eli Zaretskii
2022-02-10 13:09 ` Po Lu
2021-12-09 11:45 ` Eli Zaretskii
2021-12-09 12:19 ` Po Lu
2021-12-09 12:45 ` Eli Zaretskii
2021-12-04 13:00 ` dick
2021-12-04 13:14 ` tomas
2021-12-04 13:19 ` Po Lu
2021-12-04 13:41 ` Eli Zaretskii
2021-12-05 0:46 ` Po Lu
2021-12-05 7:12 ` Eli Zaretskii
2021-12-05 7:16 ` Po Lu
2021-12-05 8:48 ` Eli Zaretskii
2021-12-05 9:15 ` Po Lu
2021-12-05 9:25 ` Eli Zaretskii
2021-12-05 9:31 ` Po Lu [this message]
2021-12-05 10:34 ` Eli Zaretskii
2021-12-05 10:37 ` Po Lu
2021-12-04 14:17 ` dick
2021-12-04 16:33 ` Eli Zaretskii
2021-12-04 17:13 ` dick
2021-12-05 0:48 ` Po Lu
2021-11-28 14:03 ` Alan Mackenzie
2021-11-28 14:28 ` Eric S Fraga
2021-11-28 14:39 ` Eli Zaretskii
2021-11-28 16:55 ` Eric S Fraga
2021-11-28 14:42 ` dick
2021-11-28 15:39 ` Kévin Le Gouguec
2021-11-28 15:45 ` Eli Zaretskii
2021-11-28 17:14 ` Kévin Le Gouguec
2021-11-28 16:59 ` Eric S Fraga
2021-11-28 17:30 ` Kévin Le Gouguec
2021-11-29 0:34 ` Dmitry Gutov
2021-11-29 0:34 ` Po Lu
2021-12-08 1:45 ` John Ankarström
2021-12-08 12:45 ` Eli Zaretskii
2021-12-08 13:33 ` John Ankarström
2021-12-08 13:38 ` Po Lu
2021-12-08 13:52 ` John Ankarström
2021-12-08 14:26 ` Eli Zaretskii
2021-12-08 16:57 ` Stefan Monnier
2021-12-08 19:29 ` Yuri Khan
2021-12-09 0:16 ` Po Lu
2021-12-08 19:21 ` Rudolf Schlatte
2021-12-08 19:56 ` Juri Linkov
2021-12-08 20:05 ` André A. Gomes
2021-12-08 20:31 ` Linux console scrollback [ Was: Allowing point to be outside the window? ] Alan Mackenzie
2021-12-09 0:17 ` Allowing point to be outside the window? Po Lu
2021-12-08 22:25 ` Kévin Le Gouguec
2021-12-08 23:17 ` John Ankarström
[not found] <9603C99D-97E7-4285-A1C1-022191B6F5CC@univie.ac.at>
2021-12-08 18:43 ` Konrad Podczeck
2021-12-08 20:47 ` John Ankarström
2021-12-09 15:34 Konrad Podczeck
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