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From: Juri Linkov <juri@linkov.net>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 37667@debbugs.gnu.org
Subject: bug#37667: 27.0.50; Tab Bar display problems with more than 5 tabs
Date: Fri, 18 Oct 2019 01:34:15 +0300	[thread overview]
Message-ID: <878spj57dk.fsf@mail.linkov.net> (raw)
In-Reply-To: <83blufdehy.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 17 Oct 2019 10:20:57 +0300")

>> Thanks for the explanation.  One thing that I still don't understand is
>> how to find the exact position in the mode-line string where it's
>> truncated.  For example, in the string "...abc|xyz", the part
>> until "abc" is visible, but the rest of the string is truncated,
>> so "xyz" is not visible.  How to find this position where truncation occurs?
>
> You should look for that in the glyphs, not in the string you want to
> display.
>
>> Actually, it seems I found it, it's it.last_visible_x.  Is this correct?
>
> it.last_visible_x is the first pixel that is _outside_ of the
> viewport.  The last pixel that is still visible has X coordinate one
> less than that.
>
> Also note that when a screen line (a.k.a. "glyph row") is hscrolled,
> its display doesn't starts when it.current_x is zero, it starts when
> it.current_x is it.first_visible_x.

It seems before implementing this, first we need to decide
what UI we could provide.  This decision affects a set of commands
that needs to be implemented for tab-line hscrolling.

One variant is to allow dragging the tab-line by mouse where
dragging to the left will scroll the tab-line to the left.
But actually no web browser implements this behavior, they use
dragging to move a tab to other place.

So maybe better to have two arrow buttons: clicking on the left arrow
will hscroll to the left.

Then we need two commands implemented in C: 'tab-line-scroll-left'
and 'tab-line-scroll-right'.  And later to add some keys like
'C-x >' bound to 'scroll-left'.

These commands could work for the tab-line like hscrolling
in the buffer works when 'auto-hscroll-mode' is 'current-line'.
Also their ARG could be like in 'scroll-left' where the default ARG
is window width minus 2.





  reply	other threads:[~2019-10-17 22:34 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-08 18:55 bug#37667: 27.0.50; Tab Bar display problems with more than 5 tabs Eli Zaretskii
2019-10-10 22:25 ` Juri Linkov
2019-10-11  7:16   ` Eli Zaretskii
2019-10-13 22:39     ` Juri Linkov
2019-10-14  7:00       ` Eli Zaretskii
2019-10-14 21:47         ` Juri Linkov
2019-10-15  9:09           ` Eli Zaretskii
2019-10-15 18:07             ` Juri Linkov
2019-10-15 18:46               ` Eli Zaretskii
2019-10-15 19:10                 ` Eli Zaretskii
2019-10-15 22:39                   ` Juri Linkov
2019-10-16 16:51                     ` Eli Zaretskii
2019-10-16 22:39                       ` Juri Linkov
2019-10-17  7:20                         ` Eli Zaretskii
2019-10-17 22:34                           ` Juri Linkov [this message]
2019-10-18  6:57                             ` Eli Zaretskii
2019-10-20 22:28                               ` Juri Linkov
2019-10-21  7:58                                 ` Eli Zaretskii
2019-10-21 22:20                                   ` Juri Linkov
2019-10-22 15:16                                     ` Eli Zaretskii
2019-10-22 21:19                                       ` Juri Linkov
2019-10-23 16:10                                         ` Eli Zaretskii
2019-10-28 22:38                                           ` Juri Linkov
2019-10-29 12:01                                             ` Eli Zaretskii
2019-10-30  0:35                                               ` Juri Linkov
2019-10-30 15:59                                                 ` Eli Zaretskii
2019-10-30 23:59                                                   ` Juri Linkov
2019-10-31 14:25                                                     ` Eli Zaretskii
2019-10-31  0:03                                                   ` Juri Linkov
2019-10-31 14:30                                                     ` Eli Zaretskii
2019-10-31 20:46                                                       ` Juri Linkov
2019-11-01  7:43                                                         ` Eli Zaretskii
2019-11-02 19:06                                                           ` Juri Linkov
2019-11-02 19:28                                                             ` Eli Zaretskii
2019-11-02 22:36                                                               ` Juri Linkov
2019-11-17 21:44                                           ` Juri Linkov
2019-11-18 16:18                                             ` Eli Zaretskii
2019-11-18 21:57                                               ` Juri Linkov
2019-11-19 16:51                                                 ` Eli Zaretskii
2019-11-19 22:25                                                   ` Juri Linkov
2019-11-20  3:45                                                     ` Eli Zaretskii
2019-11-20 22:40                                                       ` Juri Linkov
2019-11-21  8:23                                                         ` martin rudalics
2019-11-21 14:20                                                           ` Eli Zaretskii
2019-11-21 21:56                                                           ` Juri Linkov
2019-11-22  8:16                                                             ` martin rudalics
2019-10-11  8:17   ` martin rudalics
2019-10-13 22:31     ` Juri Linkov
2019-10-14  6:51       ` Eli Zaretskii
2019-10-14 20:07         ` Juri Linkov
2019-10-14 20:22           ` Eli Zaretskii
2019-10-14 21:50             ` Juri Linkov
2019-10-15  6:26               ` Eli Zaretskii
2019-10-15 17:54                 ` Juri Linkov
2019-10-16 18:14       ` martin rudalics
2019-10-16 20:58         ` Juri Linkov
2019-10-17  8:25           ` martin rudalics
2020-09-20 11:24 ` Lars Ingebrigtsen
2020-09-20 11:27   ` Eli Zaretskii

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