Hook up the ownership events

This patch applies most of the protocol conversions and the internal event
type for ownership events.

Note that ownership events are generated by the DIX only, they do not pass
through the event queue.

Co-authored-by: Daniel Stone <daniel@fooishbar.org>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>

include/eventstr.h

@@ -53,6 +53,7 @@ enum EventType {
     ET_TouchBegin,
     ET_TouchUpdate,
     ET_TouchEnd,
+    ET_TouchOwnership,
     ET_Enter,
     ET_Leave,
     ET_FocusIn,
@@ -123,6 +124,24 @@ struct _DeviceEvent
     uint32_t flags;   /**< Flags to be copied into the generated event */
 };
 
+/**
+ * Generated internally whenever a touch ownership chain changes - an owner
+ * has accepted or rejected a touch, or a grab/event selection in the delivery
+ * chain has been removed.
+ */
+struct _TouchOwnershipEvent
+{
+    unsigned char header; /**< Always ET_Internal */
+    enum EventType type;  /**< One of EventType */
+    int length;           /**< Length in bytes */
+    Time time;            /**< Time in ms */
+    int deviceid;         /**< Device to post this event for */
+    int sourceid;         /**< The physical source device */
+    uint32_t touchid;     /**< Touch ID (client_id) */
+    uint8_t reason;       /**< ::XIAcceptTouch, ::XIRejectTouch */
+    uint32_t resource;    /**< Provoking grab or event selection */
+    uint32_t flags;       /**< Flags to be copied into the generated event */
+};
 
 /* Flags used in DeviceChangedEvent to signal if the slave has changed */
 #define DEVCHANGE_SLAVE_SWITCH 0x2
@@ -238,6 +257,7 @@ union _InternalEvent {
         } any;
         DeviceEvent device_event;
         DeviceChangedEvent changed_event;
+        TouchOwnershipEvent touch_ownership_event;
 #if XFreeXDGA
         DGAEvent dga_event;
 #endif