Bug 78372 - create multiple windows with offset

[Bill Spitzak]

On 05/07/2014 10:54 PM, Pekka Paalanen wrote:

> This is similar to session save/restore, lacking a better term for it.
> We do not even pretend to support or enable this yet. It is just yet one
> more feature that the shell protocol suite for desktop should cover,
> but so far no-one has done any work on it AFAIK.
>
> If there is not one already, you are welcome to open a feature request
> bug about application layout save/restore.

But the only practical method I can see is to allow the client to query 
and set the output and x/y position of any surface directly.

For portability it would help if each output was given an x/y in some 
global space so that only a single x/y must be stored (it is ok if the 
client has to translate from global x/y to output + x/y, but there is a 
requirement that the compositor can be queried for these output x/y).

As any such x/y position has been explicitly stated as being disallowed 
by Wayland, I am a bit stumped as to what, if any, solution is being 
imagined.

Possibly you are reading the words "save/restore" literally, in that you 
are imagining some blob of data stored in the compositor that is 
recognized to restore the layout. However this is NOT what is wanted. 
Clients must be able to generate a usable layout the first time they are 
run, they must be able to do something intelligent if the set of windows 
changes from that in the saved layout, and use a layout from one system 
on another (including cross-platform), and be able to choose layouts 
from a list and add the current layout as a new item on the list.