InputRedirection keeps track of the Toplevel which is currently the one
which should get pointer events. This is determined by checking whether
there is an Unmanaged or a Client at the pointer position. At the moment
this is still slightly incorrect, e.g. pointer grabs are ignored,
unmanaged are not checked whether they are output only and input shapes
are not yet tracked.
The pointer events are delivered to the Toplevel as:
* enter
* leave
* move
* button press
* axis event
Nevertheless move events are still generated in InputRedirection through
xcb test for simplicity. They are still send to the root window, so all
windows get mouse move.
Button press and axis are generated only in the implementations of the
event handlers and delivered directly to the window, so other windows
won't see it.
InputRedirection forwards pointer events (currently motion, press and
release) through the EffectsHandlerImpl for the case that an effect has
intercepted pointer events.
If the KWin operation mode is not X11 only, the window for intercepting
the mouse events is no longer created.
So far this new class is not yet doing much. The WaylandBackend forwards
the received pointer events to this InputRedirection class. From there
signals are emitted to inform internal areas about the changes first.
The events are currently forwarded to X through the xtest extension. This
will be removed in future. Input will be forwarded directly to the
surface which wants it (no matter whether X11 or Wayland).
