Add BTN_TOUCH/STYLUS/STYLUS2 support.

These three buttons are mapped into buttons 1/2/3, respectively.
Overlapping range with BTN_LEFT/MIDDLE/RIGHT, assuming that these
ranges don't generally appear in a single device simultaneously.

Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

src/evdev.c

@@ -2254,6 +2254,16 @@ EvdevUtilButtonEventToButtonNumber(EvdevPtr pEvdev, int code)
 	button = (code - BTN_LEFT + 5);
 	break;
 
+    case BTN_TOUCH:
+        button = 1;
+        break;
+    case BTN_STYLUS:
+        button = 2;
+        break;
+    case BTN_STYLUS2:
+        button = 3;
+        break;
+
     default:
 	if ((code > BTN_TASK) && (code < KEY_OK)) {
 	    if (code < BTN_JOYSTICK) {