GNU bug report logs - #37774
27.0.50; new :extend attribute broke visuals of all themes and other packages

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From: Ergus <spacibba <at> aol.com>
To: Kévin Le Gouguec <kevin.legouguec <at> gmail.com>
Cc: martin rudalics <rudalics <at> gmx.at>, Eli Zaretskii <eliz <at> gnu.org>, jonas <at> bernoul.li, 37774 <at> debbugs.gnu.org
Subject: bug#37774: 27.0.50; new :extend attribute broke visuals of all themes and other packages
Date: Thu, 5 Dec 2019 19:22:46 +0100

Hi:

I just saw this message and I was going to look into it but I see that
there is a today's commit related with the extend feature.

Eli did you already fixed this? Or is it still pending?



On Thu, Dec 05, 2019 at 05:48:22PM +0100, K??vin Le Gouguec wrote:
>martin rudalics <rudalics <at> gmx.at> writes:
>
>>> Please push it for me.
>>
>> Pushed now.  Please have a look.
>
>(For context: this was commit 8232325337 "Handle case where a face's
>:extend attribute is unspecified (Bug#37774)".)
>
>I think there might have been a regression since this commit: in-between
>1c29ba0340 (2019-11-17) and 21790e5473 (2019-12-05), something caused
>the backgrounds to no longer extend for faces with unspecified :extend
>inheriting faces with :extend t.
>
>The attached theme sets :extend t for diff-{added,removed}, and sets
>:inherit (diff-???) for ediff-fine-diff-{A,B}.
>


>
>From emacs -Q, running the following code:
>
>    (add-to-list 'custom-theme-load-path default-directory)
>    (load-theme 'extend-inherit t)
>    (ediff-files "/usr/share/common-licenses/LGPL-2" "/usr/share/common-licenses/LGPL-2.1")
>
>??? gives the following results with commit 1c29ba0340:
>


>
>??? and the following results with commit 21790e5473:
>


>
>Is this deliberate?  I don't think I read anything in this thread
>suggesting it; apologies if I missed something.
>
>If it's a bug, maybe this is due to recent changes in xfaces.c?
>
>    git log --oneline 1c29ba0340..21790e5473 -- src/xfaces.c
>    d4515f3cab Support ':extend' in faces defined by list of key/value pairs
>    19aecd340b Fix face merging when some have :extend non-nil and some are inherited

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