Re: "modern" colors Re: Changes for emacs 28

[Ricardo Wurmus]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Ricardo Wurmus <rekado@elephly.net>
>> Cc: spacibba@aol.com, casouri@gmail.com, emacs-devel@gnu.org, ams@gnu.org,
>>  monnier@iro.umontreal.ca, ghe@sdf.org, tecosaur@gmail.com
>> Date: Sun, 13 Sep 2020 21:49:24 +0200
>> 
>> > Then it's a mystery only you can solve.  Look at the definition of the
>> > 'region' face in faces.el: the only case where we use :inverse-video
>> > is on monochrome TTYs.  If that is not your case, then I don't know
>> > how to explain the fact that you see the region in reverse video.  I
>> > guess I'm missing something, but what?
>> 
>> The ’region’ face has these settings:
>> 
>>   DistantForeground: gtk_selection_fg_color
>>          Background: gtk_selection_bg_color
>> 
>> I switch to a light GTK theme and run Emacs:
>> 
>>   $ dconf write /org/gnome/desktop/interface/gtk-theme "'Adwaita'"
>>   $ emacs -Q
>> 
>> Now the selected region has a light gray background.
>> 
>> I switch to a dark GTK theme and run Emacs:
>> 
>>   $ dconf write /org/gnome/desktop/interface/gtk-theme "'Adwaita-dark'"
>>   $ emacs -Q
>> 
>> Now the selected region has a very dark background and the text is
>> bright.
>> 
>> I suppose that’s exactly what gtk_selection_bg_color and
>> gtk_selection_fg_color are supposed to do: take the colours from the GTK
>> theme.
>
> Thanks for investigating.  So this explains the colors that you see,
> but AFAIU, they are not exactly the default colors inverted, they just
> look similar to that.  Your original description said the region was
> shown in inverse video, which is what puzzled me.

Yes, it is not inverse video, but it looks very much like it with the
Adwaita-dark theme.  I could not know the true cause prior to
investigating the issue :)

-- 
Ricardo