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bug#10683: 23.4; Reverse video doesn't work for -nw


From: Dan Nicolaescu
Subject: bug#10683: 23.4; Reverse video doesn't work for -nw
Date: Tue, 31 Jan 2012 17:39:43 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Glenn Morris <rgm@gnu.org> writes:

> Łukasz Michalik wrote:
>
>>> and Emacs detected the background mode as dark when it should
>>> have been light (or vice versa)
>> I don't really understand that, but whatever you say.  I used to get
>> transparent background with white fg, now it's reversed.
>
> Could you say what terminal emulator you are using and what the value of
> $TERM is?
>
> http://debbugs.gnu.org/cgi/bugreport.cgi?bug=2501
>
> suggests setting COLORFGBG, but I don't know what that does.

In rxvt COLORFGBG can be used to determine the fg and bg color used by
the terminal.  Emacs can use that to set the `background-mode', and
all the faces are defined based on `background-mode'.

It might be interesting to evaluate this:

M-: (frame-parameter (selected-frame) 'background-mode)) RET

in the old and new emacs and see if that changed.





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