
Clutter touch events are translated into events being sent down the interface resource, with the exception of FRAME/CANCEL events, which are handled directly via an evdev event filter. The seat now announces invariably the WL_SEAT_CAPABILITY_TOUCH capability, this should be eventually updated as devices come and go. The creation of MetaWaylandTouchSurface structs is dynamic, attached to the lifetime of first/last touch on the client surface, and only if the surface requests the wl_touch interface. MetaWaylandTouchInfo structs are created to track individual touches, and are locked to a single MetaWaylandTouchSurface (the implicit grab surface) determined on CLUTTER_TOUCH_BEGIN. https://bugzilla.gnome.org/show_bug.cgi?id=724442
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