Rather than maintain copies of the entire focus stack, this PR
transactionises the focus by introducing two new properties to the
container state and using those when rendering.
* `bool focused` means this container has actual focus. Only one
container should have this equalling true in its current state.
* `struct sway_container *focus_inactive_child` points to the immediate
child that was most recently focused (eg. for tabbed and stacked
containers).
If you moved your mouse over swaybar (e.g. to scroll between
workspaces), focus would move to the workspace. This is not the right
thing to do. The solution is complicated by the fact that if you move
your mouse into a new output with an empty workspace, that workspace
_should_ receive focus.
Swayidle handles idle events and allows
for dpms and lockscreen handling. It also
handles systemd sleep events, and can
raise a lockscreen on sleep
Fixes#541
This required changing container_at_cursor to container_at_coords so
that we could get the appropriate surface (and sx/xy) without moving the
cursor.
Future work:
- Simulate a cursor for clients which have not bound to wl_touch
- Keep sending motion events when moving outside the surface (#1892)
- Bind gestures to sway commands
* Render background when using fullscreen, because transparency.
* Check that fullscreen surface allows input.
* Don't look for surfaces in top layer if there's a fullscreen view.