Add a new type of ipc subscription so clients can be notified of changes
in idle inhibitors. This allows to react to those events by e.g.
changing container properties (title, ...) to notify the user about this
circumstance (add marker, change color, ...). For this reason the event
includes information about the affected container as well.
Signed-off-by: Michael Weiser <michael.weiser@gmx.de>
This implements the following command to set/unset a user idle
inhibitor for a view:
`inhibit_idle focus|fullscreen|open|none|visible`
The modes are as follows:
- focus: inhibited when the view is focused by any seat
- fullscreen: inhibited when the view is fullscreen (or a descendant of
a fullscreen container) and is visible on any output
- open: inhibited until the view is closed or the inhibitor is unset or
changed
- none: unsets any user set idle inhibitors for the view
- visible: inhibited when the view is visible on any output
This should have no effect on idle inhibitors set by the applications
themselves and those should still work as intended.
Since this operates on the view in the handler context, it is possible
to set it on the currently focused view, on any existing view with
criteria, or for any future view with for_window.
