bug#49997: 27.2; idle-time reset when switching desktop-page

[martin rudalics]

>> The code you show is in keyboard.c, where we interpret the events
>> we've received.  To see whether we can distinguish between these
>> events and "real" move-frame events, we need to look in xterm.c, where
>> the events come in from the window-system.  Maybe they are different
>> in their raw form?
>
> Ah, I see.  Right, this is in handle_one_xevent, where we apparently
> synthesise the MOVE_FRAME_EVENT:
>
>          if (!FRAME_TOOLTIP_P (f)
>              && (old_left != f->left_pos || old_top != f->top_pos))
>            {
>              inev.ie.kind = MOVE_FRAME_EVENT;
>              XSETFRAME (inev.ie.frame_or_window, f);
>            }
>        }
>
> So it's purely based on whether the window manager told is that the
> position changed -- which I guess it sort of does?  When I move to a
> different virtual desktop, it shows me all the iconified frames, and
> that's probably where this comes from?
>
> This is in:
>
>      case ConfigureNotify:
>
> that case in itself is almost 200 lines long...
>
> I've added Martin to the CCs; perhaps he has some insights here.

I can offer the attached trivial patch.  Peter, can you try it?

martin

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