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bug#36030: Changing the region or the point changes the way characters a
From: |
Clément Pit-Claudel |
Subject: |
bug#36030: Changing the region or the point changes the way characters are displayed |
Date: |
Fri, 31 May 2019 16:51:10 -0400 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 |
On 2019-05-31 16:02, Eli Zaretskii wrote:
>> 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.
Sorry about this. It is in a Python buffer.
>> 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).
But it also changes from FreeSans to FreeMono; isn't that a font change?
> 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?
This is python-mode's syntax highlighting. Unfortunately, I don't have a
reproducible recipe for these issues yet; they happen on my machine, but I have
many custom fonts and Emacs customization here. I will try to find a recipe.
Clément.