From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Changes in frame/window code
Date: Mon, 28 Jul 2014 15:57:15 +0200 [thread overview]
Message-ID: <53D656BB.3010201@gmx.at> (raw)
In-Reply-To: <83fvhlhad5.fsf@gnu.org>
> If you include the space on the left, then the width of an R2L display
> line is always exactly equal to the window width. This is how the
> display engine computes the width of the stretch glyph that represents
> "the space on the left".
But if that R2L line starts on the right of the right window edge it's
larger, I presume.
> If you want the line width without the stretch, then you calculate it
> exactly like with L2R lines: columns and line widths are computed in
> the logical order.
Hmmm... That would mean my calculations in
whole = move_it_to (&it, -1, INT_MAX, window_box_height (w), -1,
MOVE_TO_X | MOVE_TO_Y);
of set_horizontal_scroll_bar have a flaw.
>> IIUC this means that the slider width must be calculated paragraph-wise
>> and position and size of the slider are meaningful only with respect to
>> the paragraph point is currently in.
>
> Yes. But that is true for strictly L2R text as well, no? I mean, the
> size of the scroll-bar thumb should depend on the width of the line at
> point, right?
No. The slider size repesents the width of the window with respect to
the longest line shown in the window. Try moving point through the
first column within a window - the slider size should not change.
> It doesn't work when you drag the slider. When you drag the slider,
> the text is scrolled in the wrong direction. The underlying problem
> is that the slider starts in a wrong position -- it should be all the
> way to the right, not to the left. AFAIU, this can only be fixed on
> the C level.
Is the size of the slider correct in the sense described above? Then
fixing the position should not be that difficult.
> (Btw, shouldn't GTK scroll bars already support bidirectional text out
> of the box? Perhaps you need to set some flag(s) to get that.)
No idea. In any case I would have to tell GTK whether the "current
text" (whatever that is) is L2R or R2L I suppose.
martin
next prev parent reply other threads:[~2014-07-28 13:57 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-22 13:42 Changes in frame/window code martin rudalics
2014-07-23 10:45 ` Dmitry Antipov
2014-07-23 12:48 ` martin rudalics
2014-07-23 15:05 ` set-frame-height glitch [Was: Re: Changes in frame/window code] Dmitry Antipov
2014-07-23 15:36 ` martin rudalics
2014-07-23 15:26 ` Changes in frame/window code martin rudalics
2014-07-23 16:14 ` martin rudalics
2014-07-23 10:59 ` Dmitry Antipov
2014-07-23 12:48 ` martin rudalics
2014-07-27 13:32 ` martin rudalics
2014-07-27 14:50 ` Jan Djärv
2014-07-27 18:14 ` martin rudalics
2014-07-27 14:50 ` Eli Zaretskii
2014-07-27 18:07 ` Eli Zaretskii
2014-07-27 18:19 ` martin rudalics
2014-07-28 4:48 ` Dmitry Antipov
2014-07-28 9:27 ` martin rudalics
2014-07-28 18:22 ` Hint on Xaw3d scroll bar colors issue [Was: Re: Changes in frame/window code] Dmitry Antipov
2014-07-29 9:21 ` martin rudalics
2014-07-29 11:27 ` Dmitry Antipov
2014-07-29 14:01 ` martin rudalics
2014-07-29 15:42 ` Jan Djärv
2014-07-29 16:54 ` Dmitry Antipov
2014-07-29 17:17 ` Jan Djärv
2014-07-30 16:44 ` martin rudalics
2014-07-29 16:43 ` Bingo [Re: Hint on Xaw3d scroll bar colors issue [Was: Re: Changes in frame/window code]] Dmitry Antipov
2014-07-29 17:14 ` Jan Djärv
2014-07-30 16:44 ` martin rudalics
2014-07-29 9:19 ` Changes in frame/window code martin rudalics
2014-07-29 11:28 ` Dmitry Antipov
[not found] ` <83tx62hane.fsf@gnu.org>
2014-07-28 9:26 ` martin rudalics
2014-07-28 13:38 ` Eli Zaretskii
2014-07-28 13:57 ` martin rudalics [this message]
2014-07-28 14:25 ` Eli Zaretskii
2014-07-28 17:27 ` martin rudalics
2014-07-28 18:15 ` Eli Zaretskii
2014-07-29 9:20 ` martin rudalics
2014-07-29 9:41 ` Eli Zaretskii
2014-07-29 9:55 ` Eli Zaretskii
2014-07-29 10:47 ` martin rudalics
2014-07-29 10:23 ` Eli Zaretskii
2014-07-29 10:47 ` martin rudalics
2014-07-29 11:33 ` Eli Zaretskii
2014-07-29 14:02 ` martin rudalics
2014-07-29 14:51 ` Eli Zaretskii
2014-07-29 15:43 ` martin rudalics
2014-07-29 16:14 ` Eli Zaretskii
2014-07-29 18:23 ` martin rudalics
2014-07-29 18:34 ` Eli Zaretskii
2014-07-30 16:05 ` martin rudalics
2014-07-30 16:27 ` Eli Zaretskii
2014-07-30 16:45 ` martin rudalics
2014-07-30 17:20 ` Eli Zaretskii
2014-07-30 17:36 ` martin rudalics
2014-07-30 17:53 ` Eli Zaretskii
2014-07-31 8:49 ` martin rudalics
2014-07-31 10:06 ` Eli Zaretskii
2014-07-31 10:09 ` martin rudalics
2014-07-31 11:06 ` Eli Zaretskii
2014-07-31 11:35 ` martin rudalics
2014-08-01 9:40 ` Eli Zaretskii
2014-08-01 10:25 ` martin rudalics
2014-08-01 13:12 ` Eli Zaretskii
2014-08-01 15:29 ` martin rudalics
2014-08-01 16:33 ` Eli Zaretskii
[not found] ` <53EE2CD5.50603@gmx.a>
2014-08-15 15:52 ` martin rudalics
2014-08-15 16:40 ` Eli Zaretskii
2014-08-16 9:35 ` martin rudalics
2014-08-16 11:29 ` Eli Zaretskii
[not found] ` <53EF609C.2090303@gmx>
2014-08-16 13:46 ` martin rudalics
2014-08-16 14:43 ` Eli Zaretskii
2014-08-16 16:07 ` martin rudalics
2014-08-16 16:09 ` martin rudalics
2014-08-16 16:19 ` martin rudalics
2014-08-17 15:13 ` Eli Zaretskii
2014-08-18 8:31 ` martin rudalics
2014-08-18 15:00 ` Eli Zaretskii
2014-08-18 16:11 ` martin rudalics
2014-08-18 16:22 ` Eli Zaretskii
2014-08-19 15:15 ` Eli Zaretskii
2014-08-20 14:45 ` Eli Zaretskii
2014-08-20 15:32 ` martin rudalics
2014-08-20 15:32 ` martin rudalics
2014-08-20 15:49 ` Eli Zaretskii
2014-08-28 9:40 ` martin rudalics
2014-08-28 15:10 ` Eli Zaretskii
2014-08-28 19:05 ` martin rudalics
2014-08-28 19:15 ` Eli Zaretskii
2014-08-29 9:00 ` martin rudalics
2014-08-29 9:53 ` Eli Zaretskii
2014-08-31 15:48 ` Eli Zaretskii
2014-08-31 16:22 ` martin rudalics
2014-08-28 15:56 ` Glenn Morris
2014-08-28 19:04 ` martin rudalics
2014-07-29 20:35 ` Jan Djärv
2014-07-29 10:44 ` martin rudalics
2014-07-29 15:29 ` Jan Djärv
2014-07-29 16:34 ` Eli Zaretskii
2014-07-31 16:18 ` Stefan Monnier
2014-07-31 16:37 ` Tassilo Horn
2014-07-31 16:53 ` martin rudalics
2014-08-27 17:13 ` Drew Adams
2014-07-31 17:32 ` Eli Zaretskii
2014-07-31 16:38 ` Eli Zaretskii
2014-07-31 16:53 ` martin rudalics
2014-09-03 16:17 ` martin rudalics
2014-09-04 18:30 ` Glenn Morris
2014-09-05 10:47 ` martin rudalics
2014-09-05 17:14 ` Glenn Morris
2014-07-27 18:15 ` martin rudalics
2014-07-27 17:14 ` Stefan Monnier
2014-07-27 18:15 ` martin rudalics
2014-07-27 20:28 ` Glenn Morris
2014-08-05 1:42 ` Jay Belanger
2014-08-05 8:38 ` martin rudalics
2014-08-05 14:37 ` Jay Belanger
2014-08-05 15:45 ` martin rudalics
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