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bug#2199: 23.0.60; calendar marks and font-lock-mode


From: Stefan Monnier
Subject: bug#2199: 23.0.60; calendar marks and font-lock-mode
Date: Tue, 10 Feb 2009 20:35:19 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

> I noticed that frames on workspaces other than the current one have a
> 'visibility frame-parameter of 'icon, which surprised me. Does that
> make sense?

Yes.  X11 doesn't have a notion of "workspace", fundamentally, so
window-managers simulate it by mapping/unmapping (the X11 terms for
display/hide) the windows according to which windows are displayed in
the current workspace.

Now mapping/unmapping is the same mechanism used to iconify/deiconify
a window, so Emacs treats an unmapped window as "iconified".

Note that window-managers could use other techniques to
hide/show windows.  E.g. they could just move them "out of sight", in
which case Emacs would consider those windows as still "visible" but
with bogus left/right positions.


        Stefan






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