From: Eli Zaretskii <eliz@gnu.org>
To: Dmitry Gutov <dgutov@yandex.ru>
Cc: 18195@debbugs.gnu.org
Subject: bug#18195: 24.3.92; window-screen-lines is not accurate
Date: Wed, 06 Aug 2014 05:52:11 +0300 [thread overview]
Message-ID: <83k36mpbxg.fsf@gnu.org> (raw)
In-Reply-To: <53E14AF4.6050804@yandex.ru>
> Date: Wed, 06 Aug 2014 01:21:56 +0400
> From: Dmitry Gutov <dgutov@yandex.ru>
> CC: rudalics@gmx.at, 18195@debbugs.gnu.org
>
> > For example, AFAIU, your code currently assumes that the font used for
> > popup is the same as the one used for the underlying buffer text. But
> > since you provide faces for the popup, a user could legitimately
> > customize those faces to use a different font, and thus invalidate
> > your calculations, because window-screen-lines uses the metrics of the
> > default face's font.
>
> Sure. This doesn't add any constraints over what we've been living with
> for years.
Until some user would ask to lift them.
But if you never want to lift them, why not define colors instead of
full-fledged faces? Then those restrictions are really carved in
stone and clear for all.
> > IMO, instead of overloading existing display features with jobs they
> > were never designed to do, and then live forever with the situation
> > where development breaks the resulting applications (like the
> > pixel-wise resizing of windows did with this one)
>
> pixel-wise resizing wasn't actually the culprit: I've just never tested
> the code with non-zero line-spacing.
The bug had two parts; one of them _was_ due to pixel-wise resizing.
> > it would be a much
> > better investment of energy to come up with requirements for Lisp APIs
> > that could be used by applications for laying out text.
>
> That sounds great, but I don't even know where to start. What we're
> trying to emulate, though, is multi-layered display. That sounds
> somewhat different from a "text layout API" to me.
I don't mind how it is called and what is the correct abstraction. I
do know that we need some abstraction and APIs to support it. If you
already know what the correct abstraction is, then you are in a good
position to formulate the requirements.
next prev parent reply other threads:[~2014-08-06 2:52 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-05 2:00 bug#18195: 24.3.92; window-screen-lines is not accurate Dmitry
2014-08-05 8:38 ` martin rudalics
2014-08-05 10:03 ` Dmitry Gutov
2014-08-05 10:16 ` martin rudalics
2014-08-05 10:24 ` Dmitry Gutov
2014-08-05 12:20 ` martin rudalics
2014-08-05 13:05 ` Dmitry Gutov
2014-08-05 13:50 ` martin rudalics
2014-08-05 14:06 ` Eli Zaretskii
2014-08-06 11:55 ` Dmitry Gutov
2014-08-06 16:13 ` martin rudalics
2014-08-05 14:01 ` Eli Zaretskii
2014-08-05 13:58 ` Eli Zaretskii
2014-08-05 14:08 ` martin rudalics
2014-08-05 14:13 ` Eli Zaretskii
2014-08-05 13:57 ` Eli Zaretskii
2014-08-05 13:51 ` Eli Zaretskii
2014-08-05 13:57 ` martin rudalics
2014-08-05 14:09 ` Eli Zaretskii
2014-08-05 14:12 ` martin rudalics
2014-08-05 14:23 ` Eli Zaretskii
2014-08-05 14:38 ` martin rudalics
2014-08-05 15:08 ` Eli Zaretskii
2014-08-05 15:45 ` martin rudalics
2014-08-05 17:57 ` Eli Zaretskii
2014-08-06 9:41 ` martin rudalics
2014-08-06 14:39 ` Eli Zaretskii
2014-08-06 14:41 ` Dmitry Gutov
2014-08-06 16:23 ` Eli Zaretskii
2014-08-06 16:26 ` Dmitry Gutov
2014-08-06 17:24 ` Eli Zaretskii
2014-08-06 18:02 ` Dmitry Gutov
2014-08-06 18:36 ` Eli Zaretskii
2014-08-06 21:09 ` Dmitry Gutov
2014-08-06 16:15 ` martin rudalics
2014-08-06 16:30 ` Eli Zaretskii
2014-08-06 17:46 ` martin rudalics
2014-08-06 18:03 ` Eli Zaretskii
2014-08-07 15:08 ` martin rudalics
2014-08-07 15:35 ` Eli Zaretskii
2014-08-07 15:39 ` martin rudalics
2014-08-07 16:36 ` Eli Zaretskii
2014-08-08 8:41 ` martin rudalics
2014-08-08 9:16 ` Eli Zaretskii
2014-08-08 10:10 ` martin rudalics
2014-08-08 10:25 ` Eli Zaretskii
2014-08-05 13:46 ` Eli Zaretskii
2014-08-05 21:21 ` Dmitry Gutov
2014-08-06 2:52 ` Eli Zaretskii [this message]
2014-08-06 12:09 ` Dmitry Gutov
2014-08-06 14:45 ` Eli Zaretskii
2014-08-06 15:07 ` Dmitry Gutov
2014-08-06 16:25 ` Eli Zaretskii
2014-08-06 16:37 ` Dmitry Gutov
2014-08-06 17:26 ` Eli Zaretskii
2014-08-06 12:40 ` Layered display API (was: bug#18195: 24.3.92; window-screen-lines is not accurate) Dmitry Gutov
2014-08-06 17:19 ` Eli Zaretskii
2014-08-06 18:20 ` Alp Aker
2014-08-06 18:39 ` Eli Zaretskii
2014-08-06 20:48 ` Layered display API Stefan Monnier
2014-08-07 2:45 ` Eli Zaretskii
2014-08-06 20:49 ` Dmitry Gutov
2014-08-07 15:39 ` Eli Zaretskii
2014-08-11 1:14 ` Dmitry Gutov
2014-08-11 15:01 ` Eli Zaretskii
2014-08-13 2:42 ` Dmitry Gutov
2014-08-13 12:46 ` Stefan Monnier
2014-08-13 15:29 ` Eli Zaretskii
2014-08-13 16:27 ` Dmitry Gutov
2014-08-13 17:07 ` Eli Zaretskii
2014-08-13 17:45 ` Stefan Monnier
2014-08-13 15:28 ` Eli Zaretskii
2014-08-14 2:35 ` Dmitry Gutov
2014-08-14 2:53 ` Eli Zaretskii
2014-08-14 13:12 ` Dmitry Gutov
2014-08-14 15:20 ` Eli Zaretskii
2014-08-15 1:20 ` Dmitry Gutov
2014-08-15 6:39 ` Eli Zaretskii
2014-08-15 23:03 ` Dmitry Gutov
2014-08-16 7:41 ` Eli Zaretskii
2014-08-16 9:17 ` Dmitry Gutov
2014-08-14 2:06 ` Bo Lin
2014-08-14 2:49 ` Eli Zaretskii
2014-08-14 16:08 ` Bo Lin
2014-08-14 16:19 ` Eli Zaretskii
2014-08-14 16:42 ` Bo Lin
2014-08-06 20:56 ` Stefan Monnier
2014-08-05 13:35 ` bug#18195: 24.3.92; window-screen-lines is not accurate Eli Zaretskii
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