There is a certain ambiguity in how geometry should be specified by
user, when Window Manager is supporting virtual viewports. This surfaced
as the result of GIMP abuse of USPosition flag which is outlined here
: http://bugzilla.gnome.org/show_bug.cgi?id=319099
Basically, for user to be able to place , say, a term window into
arbitrary viewport on the desktop, using just a command-line options -
geometry must be specified in relation to the desktop origin, there is
no other way around it. Therefore it is a duty of a Window Manager to
always treat USPosition in relation to a desktop origin.
On the other hand, as apps itself may not be aware of existence of
virtual viewports, and even if they do - its not possible to reliably
take it into consideration - PPosition must always be treated in
relation to the current viewport's origin.
Now this is not a transparent conclusion for anyone not involved with
window management to a certain depth, and therefore I suggest that this
should be clarified in specs under "Desktop/workspace model" subsection
of Implementation notes.
Anybody wants to comment on that ?
Regards,
Sasha Vasko
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