Re "cat" (which should rather be "ls -1") with LTR vs. autodetected
directionality:
Let's use the convention here that uppercase letters are fake Arabic,
e.g. imagine that the word [written as LTR here] "ARABIC" is a valid
Arabic word which is supposed to visually appear as "CIBARA".
Let's have
Re "nano" with LTR vs. autodetected directionality:
The LTR screenshot is more obviously "broken" (or at least
undesireable). The autodetected directionality's brokenness is less
obvious, maybe no breakage is visible in this particular screenshot, but
is still broken.
Maybe it looks pretty much
Hi M.Hanny,
Thanks a lot for spreading the word about BiDi support in VTE!
Really no need to apologize about your English! I'm not a native English
speaker either, and your English is at least as good as mine. We have no
communication issues at all!
---
> Ideally, there shouldn't be a text in
Thanks for the latest test, M.Hanny Sabbagh. A rewritten patch is now on
its way to the coming Ubuntu 23.04.
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Title:
Poor
@Egmont:
Thank you for the valuable feedback.
First I would like to ask you to forgive me if some of my words are not
clear or vague; I am not a native English speaker so it is a little bit
hard when I write long responses like this. I hope I am correctly
delivering my ideas to you and others.
** Attachment added: "nano output with autodetect.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5647494/+files/nano%20output%20with%20autodetect.png
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** Attachment added: "cat output with autodetect.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5647491/+files/cat%20output%20with%20autodetect.png
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** Attachment added: "cat output with LTR.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5647492/+files/cat%20output%20with%20LTR.png
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** Attachment added: "nano output with LTR.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5647493/+files/nano%20output%20with%20LTR.png
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@Gunnar:
Thank you for the continous help. I have tested the new update and
indeed it now respects the font size of Monospace font in GNOME Tweaks
(image attached).
Thanks again!
** Attachment added: "gnome-terminal new monospace.png"
> The only thing that remains is related to bug 2 and the RTL text auto-
detection in VTE. I am yet to hear from Egmont on anything we can do in
this regard.
Both the autodetection "on" and "off" values have pros and cons. I don't
think either one is better per se than the other. One is better in
On 2023-02-03 10:46, Gunnar Hjalmarsson wrote:
> https://salsa.debian.org/gnome-team/gnome-terminal/-/blob/e832a65a/debian/patches/Use-DejaVu-as-system-font-if-LANG-is-Arabic.patch
I got more feedback, this time in the form of a code review, and it
resulted in yet another version:
Hi M.Hanny Sabbagh!
Even if bug 1 is fixed, I have rewritten the patch after feedback from
one of the Debian developers. Currently it looks like this:
https://salsa.debian.org/gnome-team/gnome-
terminal/-/blob/e832a65a/debian/patches/Use-DejaVu-as-system-font-if-
LANG-is-Arabic.patch
One change
Thank you Gunnar for fixing the font issue in gnome terminal.
So now, we can say that bug 1 is fixed. The only thing that remains is
related to bug 2 and the RTL text auto-detection in VTE. I am yet to
hear from Egmont on anything we can do in this regard.
I hope we can find a solution to use
This bug was fixed in the package gnome-terminal - 3.46.7-1ubuntu2
---
gnome-terminal (3.46.7-1ubuntu2) lunar; urgency=medium
* Use DejaVu as system font if LANG is Arabic (LP: #2002290)
-- Gunnar Hjalmarsson Wed, 25 Jan 2023 20:14:38
+0100
** Changed in: gnome-terminal
Thanks for testing and confirming! I have uploaded the gnome-terminal
change to lunar.
** Changed in: gnome-terminal (Ubuntu)
Status: In Progress => Fix Committed
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Thank you Gunnar, for the help!
Indeed it works well on my testing (image attached); GNOME Terminal's
custom font option is disabled (so it is using the default font), and
Ubuntu Mono is still used in GNOME Tweaks, and still the GNOME Terminal
now uses Monospace font by default, making the first
I have submitted a merge request, which changes the default font for
GNOME Terminal from Ubuntu Mono to DejaVu Sans Mono if the user has
selected Arabic as the display language:
https://salsa.debian.org/gnome-team/gnome-terminal/-/merge_requests/8
A version of gnome-terminal for jammy with that
Hi Egmond.
Thank you for the info.
About lam-alif: Yes, you are right. It indeed is displayed like a U in
my screenshot, although it should have been similar to a "y", but as you
said, it is not that terribly bad and can be read without an issue.
Perhaps we can improve it in a future work!
** Attachment added: "VTE BiDi LTR base.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5641433/+files/VTE%20BiDi%20LTR%20base.png
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** Attachment added: "VTE BiDi RTL base.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5641432/+files/VTE%20BiDi%20RTL%20base.png
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** Attachment added: "VTE BiDi autodetect.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5641431/+files/VTE%20BiDi%20autodetect.png
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** Package changed: vte (Ubuntu) => vte2.91 (Ubuntu)
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Title:
Poor Arabic rendering in VTE
Status in gnome-terminal
Hi M.Hanny,
I'm so glad that you're way more familiar with fontconfig quirks as well
as Ubuntu processes than me. I wish you good luck in getting some better
config accepted and made default in Ubuntu!
-
Re lam-alif:
As far as I remember, and
Hi Egmont.
For bug 1, yes, fontconfig can be used for this. We even have a special
configuration file at /etc/fonts/conf.d/56-language-selector-ar.conf to
use a different font when the system language is Arabic (Noto Sans
Arabic). I believe it can be tweaked to use a custom Monospace font when
** Attachment added: "VTE with RTL enabled.png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5640984/+files/VTE%20with%20RTL%20enabled.png
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** Attachment added: "lam-alif ligature in GNOME Terminal (without, with).png"
https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/2002290/+attachment/5640983/+files/lam-alif%20ligature%20in%20GNOME%20Terminal%20%28without%2C%20with%29.png
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Hi M.Hanny,
Re bug 1 (rendering):
Thanks for attaching screenshots, I was lazy to do that. Indeed this is
also how the letters look to me.
It would indeed be great if Ubuntu could change its default font choice,
at least for Arabic locales. I don't know what would be the best place
to bring it
Also I found the default Monospace used in Ubuntu. It is DejaVu Sans
Mono:
mhsabbagh@ubuntu2204:/$ fc-match monospace
DejaVuSansMono.ttf: "DejaVu Sans Mono" "Book"
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** Attachment added: "apt output in gedit.png"
https://bugs.launchpad.net/ubuntu/+source/vte/+bug/2002290/+attachment/5640503/+files/apt%20output%20in%20gedit.png
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Hello Egmont.
Thank you for the detailed reply and for fixing my understanding about
these issues. I also highly appreciate your work and help!
I was using the default font in Ubuntu, but when I changed it to
Monospace 9 (or even 12) as you suggested, the spaces issues disappeared
and the text
** Attachment added: "apt output in the browser with RTL.png"
https://bugs.launchpad.net/ubuntu/+source/vte/+bug/2002290/+attachment/5640502/+files/apt%20output%20in%20the%20browser%20with%20RTL.png
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** Attachment added: "apt output in gnome terminal.png"
https://bugs.launchpad.net/ubuntu/+source/vte/+bug/2002290/+attachment/5640501/+files/apt%20output%20in%20gnome%20terminal.png
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** Attachment added: "gnome terminal with Monospace 12.png"
https://bugs.launchpad.net/ubuntu/+source/vte/+bug/2002290/+attachment/5640500/+files/gnome%20terminal%20with%20Monospace%2012.png
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** Attachment added: "gnome terminal with Monospace 9 font.png"
https://bugs.launchpad.net/ubuntu/+source/vte/+bug/2002290/+attachment/5640499/+files/gnome%20terminal%20with%20Monospace%209%20font.png
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To be absolutely fair, I have to add this:
One thing, namely the handling of BiDi _control_ characters at the very
beginning of a paragraph (logical line), remains as a TODO item both in
the spec and in VTE's implementation (both of which are really
nontrivial).
I just ran out of motivation and
(I am the one who designed [1] and implemented RTL (right-to-left) and
BiDi (bidirectional) text support in VTE.)
The two issues you report here are totally independent.
Re bug 1:
Terminal emulators, by their very nature and their legacy of maybe ~50
years, _have to_ operate in a strict
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