Xi: add DevicePresenceNotify

Add support for DevicePresenceNotify events.

Xi/exglobals.h

@@ -51,6 +51,7 @@ extern Mask DeviceMappingNotifyMask;
 extern Mask DeviceOwnerGrabButtonMask;
 extern Mask DeviceButtonGrabMask;
 extern Mask DeviceButtonMotionMask;
+extern Mask DevicePresenceNotifyMask;
 extern Mask PropagateMask[];
 
 extern int DeviceValuator;
@@ -68,12 +69,8 @@ extern int DeviceKeyStateNotify;
 extern int DeviceButtonStateNotify;
 extern int DeviceMappingNotify;
 extern int ChangeDeviceNotify;
+extern int DevicePresenceNotify;
 
 extern int RT_INPUTCLIENT;
 
-#if 0
-/* FIXME: in dix */
-extern InputInfo inputInfo;
-#endif
-
 #endif /* EXGLOBALS_H */

Xi/extinit.c

@@ -166,6 +166,7 @@ Mask DeviceMappingNotifyMask;
 Mask DeviceOwnerGrabButtonMask;
 Mask DeviceButtonGrabMask;
 Mask DeviceButtonMotionMask;
+Mask DevicePresenceNotifyMask;
 
 int DeviceValuator;
 int DeviceKeyPress;
@@ -182,6 +183,7 @@ int DeviceKeyStateNotify;
 int DeviceButtonStateNotify;
 int DeviceMappingNotify;
 int ChangeDeviceNotify;
+int DevicePresenceNotify;
 
 int RT_INPUTCLIENT;
 
@@ -202,8 +204,8 @@ Mask PropagateMask[MAX_DEVICES];
  */
 
 static XExtensionVersion thisversion = { XI_Present,
-    XI_Add_XChangeDeviceControl_Major,
+    XI_Add_DevicePresenceNotify_Major,
-    XI_Add_XChangeDeviceControl_Minor
+    XI_Add_DevicePresenceNotify_Minor
 };
 
 /**********************************************************************
@@ -648,6 +650,16 @@ SDeviceMappingNotifyEvent(deviceMappingNotify * from, deviceMappingNotify * to)
     swapl(&to->time, n);
 }
 
+void
+SDevicePresenceNotifyEvent (devicePresenceNotify *from, devicePresenceNotify *to)
+{
+    register char n;
+
+    *to = *from;
+    swaps(&to->sequenceNumber,n);
+    swapl(&to->time, n);
+}
+
 /************************************************************************
  *
  * This function sets up extension event types and masks.
@@ -674,6 +686,7 @@ FixExtensionEvents(ExtensionEntry * extEntry)
     ChangeDeviceNotify = DeviceMappingNotify + 1;
     DeviceKeyStateNotify = ChangeDeviceNotify + 1;
     DeviceButtonStateNotify = DeviceKeyStateNotify + 1;
+    DevicePresenceNotify = DeviceButtonStateNotify + 1;
 
     event_base[KeyClass] = DeviceKeyPress;
     event_base[ButtonClass] = DeviceButtonPress;
@@ -746,6 +759,9 @@ FixExtensionEvents(ExtensionEntry * extEntry)
 
     DeviceOwnerGrabButtonMask = GetNextExtEventMask();
     SetEventInfo(DeviceOwnerGrabButtonMask, _deviceOwnerGrabButton);
+
+    DevicePresenceNotifyMask = GetNextExtEventMask();
+    SetEventInfo(DevicePresenceNotifyMask, _devicePresence);
     SetEventInfo(0, _noExtensionEvent);
 }
 
@@ -786,6 +802,7 @@ RestoreExtensionEvents(void)
     ChangeDeviceNotify = 12;
     DeviceKeyStateNotify = 13;
     DeviceButtonStateNotify = 13;
+    DevicePresenceNotify = 14;
 
     BadDevice = 0;
     BadEvent = 1;
@@ -823,6 +840,7 @@ IResetProc(ExtensionEntry * unused)
     EventSwapVector[DeviceButtonStateNotify] = NotImplemented;
     EventSwapVector[DeviceMappingNotify] = NotImplemented;
     EventSwapVector[ChangeDeviceNotify] = NotImplemented;
+    EventSwapVector[DevicePresenceNotify] = NotImplemented;
     RestoreExtensionEvents();
 }
 
@@ -857,9 +875,7 @@ MakeDeviceTypeAtoms(void)
 }
 
 /**************************************************************************
- *
  * Return a DeviceIntPtr corresponding to a specified device id.
- * This will not return the pointer or keyboard, or devices that are not on.
  *
  */
 
@@ -869,13 +885,16 @@ LookupDeviceIntRec(CARD8 id)
     DeviceIntPtr dev;
 
     for (dev = inputInfo.devices; dev; dev = dev->next) {
-	if (dev->id == id) {
+	if (dev->id == id)
-	    if (id == inputInfo.pointer->id || id == inputInfo.keyboard->id)
+	    return dev;
-		return (NULL);
-	    return (dev);
     }
+
+    for (dev = inputInfo.off_devices; dev; dev = dev->next) {
+	if (dev->id == id)
+	    return dev;
     }
-    return (NULL);
+
+    return NULL;
 }
 
 /**************************************************************************

Xi/selectev.c

@@ -74,6 +74,53 @@ SOFTWARE.
 extern Mask ExtExclusiveMasks[];
 extern Mask ExtValidMasks[];
 
+static int
+HandleDevicePresenceMask(ClientPtr client, WindowPtr win,
+                         XEventClass *cls, CARD16 *count)
+{
+    int i, j;
+    Mask mask;
+
+    /* We use the device ID 256 to select events that aren't bound to
+     * any device.  For now we only handle the device presence event,
+     * but this could be extended to other events that aren't bound to
+     * a device.
+     *
+     * In order not to break in CreateMaskFromList() we remove the
+     * entries with device ID 256 from the XEventClass array.
+     */
+
+    mask = 0;
+    for (i = 0, j = 0; i < *count; i++) {
+        if (cls[i] >> 8 != 256) {
+            cls[j] = cls[i];
+            j++;
+            continue;
+        }
+
+        switch (cls[i] & 0xff) {
+        case _devicePresence:
+            mask |= DevicePresenceNotifyMask;
+            break;
+        }
+    }
+
+    *count = j;
+
+    if (mask == 0)
+        return Success;
+
+    /* We always only use mksidx = 0 for events not bound to
+     * devices */
+
+    if (AddExtensionClient (win, client, mask, 0) != Success)
+        return BadAlloc;
+
+    RecalculateDeviceDeliverableEvents(win);
+
+    return Success;
+}
+
 /***********************************************************************
  *
  * Handle requests from clients with a different byte order.
@@ -131,6 +178,13 @@ ProcXSelectExtensionEvent(register ClientPtr client)
 	return Success;
     }
 
+    if (HandleDevicePresenceMask(client, pWin, (XEventClass *) & stuff[i],
+                                &stuff->count) != Success) {
+       SendErrorToClient(client, IReqCode, X_SelectExtensionEvent, 0,
+                         BadAlloc);
+       return Success;
+    }
+
     if ((ret = CreateMaskFromList(client, (XEventClass *) & stuff[1],
 				  stuff->count, tmp, NULL,
 				  X_SelectExtensionEvent)) != Success)