bug#25978: 25.1; Message from `text-scale-adjust' is shown in other frames too

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> > As long as "C-x C--" uses 'message' to display these instructions,
>> > nothing can be done, because what you see is the usual behavior of
>> > messages displayed in the echo area: they follow the selected frame.
>> > 
>> > Perhaps the frame-switch event should simply empty the echo area.
>> > Patches to that effect are welcome.
>> 
>> Frame-switch should not systematically empty the echo area, IMO.
>
> Of course not.  I meant only in this specific case.  IOW, set things
> up in text-scale-adjust so that the echo area is emptied when frame is
> switched after displaying this particular message.

Do we have any machinery for setting up an action like that?

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