Need DBus application manager interface

[Thomi Richards]

Autopilot really needs a way to programmatically ask the unity8 shell to:

 * Tell it which applications are running.
 * Tell it which application (or applications, in the case of a side-stage being present) is focussed.
 * Close a specified application.

Optionally, perhaps also a way to:

 * Switch focus to a specified application.

This has been discussed previously, and I believe there's a simple dbus specification lying around somewhere. This bug is to track the progress of that feature.

[kevin gunn (kgunn72)]

Probably something we'll have to wait until terrible turtle to do

[Gerry Boland (gerboland)]

To get list of running apps, upstart-app-list and friends probably useful. Similarly upstart-app-stop can close app.

There is a DBus API in AppManager right now that returns focused applications - mainly for HUD. It needs iterating however, so we'll add these requirements

[Dimitri John Ledkov (xnox)]

upstart is connected to session dbus and one can control jobs over dbus through that. All apps are started as intances of an upstart job. This should enable querying running apps and closing them.

I don't believe it will provide focus / switch focus information.