From: Eli Zaretskii <eliz@gnu.org>
To: "Clément Pit-Claudel" <cpitclaudel@gmail.com>
Cc: 36030@debbugs.gnu.org
Subject: bug#36030: Changing the region or the point changes the way characters are displayed
Date: Fri, 31 May 2019 23:02:45 +0300 [thread overview]
Message-ID: <83blziwfx6.fsf@gnu.org> (raw)
In-Reply-To: <c364ddad-f28b-1e28-582a-718d47447faa@gmail.com> (message from Clément Pit-Claudel on Fri, 31 May 2019 15:28:46 -0400)
> Cc: 36030@debbugs.gnu.org
> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
> Date: Fri, 31 May 2019 15:28:46 -0400
>
> I see it with many other scripts.
> >
> > Which ones? I only see this on the Arabic line, at least in "emacs -Q".
>
> I see it with Hebrew as well, but not in emacs -Q. With this string:
>
> 'ՙա-ևא-תװ-ײؠ-يٮ-ٯٱ-ۓەۥ-ۦۮ-ۯۺ-ۼۿܐܒ-ܯݍ-ޥޱߊ-ߪߴ-ߵߺࠀ-ࠕࠚࠤࠨࡀ-ࡘࢠ-ࢴࢶ'
>
> (taken from a regular expression)
So this is not at all in the HELLO buffer? Please be sure to tell
this important detail in the future: I just spent some time trying to
reproduce the problem in HELLO.
> But if I place it at the ܒ, then run (save-excursion (goto-char <position of the beginning of the string>) (what-cursor-position t)) I see xft:-GNU -FreeSans-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x509) instead.
>
> Moving the point to a different line, the font changes again, this time to xft:-GNU -FreeMono-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1 (#x4FF)
The font doesn't change, just the glyph number reported by Emacs
changes (that's what that hex code in parentheses means).
> The rest of the what-cursor-position buffer is unchanged.
>
> With the string 'ਸ-ਹਖ਼-ੜਫ਼ੲ-ੴઅ-ઍએ-ઑઓ-નપ-રલ-ળવ-હઽૐૠ-ૡૹଅ-ଌଏ-ଐଓ-ନପ-ରଲ-ଳଵ-ହଽଡ଼-ଢ଼ୟ-', it is enough to just resize the frame to change from xft:-GNU -FreeSans-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x663) to xft:-GNU -FreeSerif-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x7F2) (but I had to set a timer to investigate this one, because moving the point reverted the font changes caused by resizing the frame.
>
> Additionally, this seems to be linked to face properties. In the what-cursor-position buffer, I see this:
>
> ਸ (displayed as ਸ) (codepoint 2616, #o5070, #xa38)
> ^ using one font.
> ^ using a different font, with font-lock-string-face on it.
>
> … and moving around the what-cursor-position buffer changes the second one, but not the first one.
I see none of that in "emacs -Q". I also don't understand how
resizing the frame could cause these effects. If the recipe is more
complicated than just copy/paste the strings you show into *scratch*,
please be sure to show the whole recipe. E.g., where did the face
properties come from?
next prev parent reply other threads:[~2019-05-31 20:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-31 15:21 bug#36030: Changing the region or the point changes the way characters are displayed Clément Pit-Claudel
2019-05-31 15:36 ` Eli Zaretskii
2019-05-31 17:06 ` Clément Pit-Claudel
2019-05-31 19:02 ` Eli Zaretskii
2019-05-31 19:28 ` Clément Pit-Claudel
2019-05-31 20:02 ` Eli Zaretskii [this message]
2019-05-31 20:51 ` Clément Pit-Claudel
2019-06-01 6:22 ` Eli Zaretskii
2019-06-06 14:18 ` Eli Zaretskii
2019-06-07 17:45 ` Clément Pit-Claudel
2019-06-07 19:50 ` Eli Zaretskii
2019-06-07 21:11 ` Clément Pit-Claudel
2019-06-08 5:54 ` Eli Zaretskii
2019-06-10 20:32 ` Clément Pit-Claudel
2019-06-11 2:27 ` Eli Zaretskii
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