wayland: Add basic input support

This copies the basic input support from the Clayland demo compositor.
It adds a basic wl_seat implementation which can convert Clutter mouse
events to Wayland events. For this to work all of the wayland surface
actors need to be made reactive.

The wayland keyboard input focus surface is updated whenever Mutter
sees a FocusIn event so that it will stay in synch with whatever
surface Mutter wants as the focus. Wayland surfaces don't get this
event so for now it will just give them focus whenever they are
clicked as a hack to test the code.

Authored-by: Neil Roberts <neil@linux.intel.com>
Authored-by: Giovanni Campagna <gcampagna@src.gnome.org>

src/wayland/meta-wayland-pointer.h

@@ -0,0 +1,49 @@
+/*
+ * Wayland Support
+ *
+ * Copyright (C) 2013 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __META_WAYLAND_POINTER_H__
+#define __META_WAYLAND_POINTER_H__
+
+#include <wayland-server.h>
+
+#include "meta-wayland-seat.h"
+
+void
+meta_wayland_pointer_init (MetaWaylandPointer *pointer);
+
+void
+meta_wayland_pointer_release (MetaWaylandPointer *pointer);
+
+void
+meta_wayland_pointer_set_focus (MetaWaylandPointer *pointer,
+                                MetaWaylandSurface *surface,
+                                wl_fixed_t sx,
+                                wl_fixed_t sy);
+void
+meta_wayland_pointer_start_grab (MetaWaylandPointer *pointer,
+                                 MetaWaylandPointerGrab *grab);
+
+void
+meta_wayland_pointer_end_grab (MetaWaylandPointer *pointer);
+
+void
+meta_wayland_pointer_set_current (MetaWaylandPointer *pointer,
+                                  MetaWaylandSurface *surface);
+
+#endif /* __META_WAYLAND_POINTER_H__ */