app: [Wayland] add forth and fifth buttons

Signed-off-by: Walter Werner SCHNEIDER <contact@schnwalter.eu>

app/os_wayland.go

@@ -884,11 +884,13 @@ func gio_onPointerButton(data unsafe.Pointer, p *C.struct_wl_pointer, serial, t,
 	s := callbackLoad(data).(*wlSeat)
 	s.serial = serial
 	w := s.pointerFocus
-	// From linux-event-codes.h.
+	// From Linux: include/uapi/linux/input-event-codes.h
 	const (
 		BTN_LEFT   = 0x110
 		BTN_RIGHT  = 0x111
 		BTN_MIDDLE = 0x112
+		BTN_SIDE   = 0x113
+		BTN_EXTRA  = 0x114
 	)
 	var btn pointer.Buttons
 	switch wbtn {
@@ -898,6 +900,10 @@ func gio_onPointerButton(data unsafe.Pointer, p *C.struct_wl_pointer, serial, t,
 		btn = pointer.ButtonSecondary
 	case BTN_MIDDLE:
 		btn = pointer.ButtonTertiary
+	case BTN_SIDE:
+		btn = pointer.ButtonQuaternary
+	case BTN_EXTRA:
+		btn = pointer.ButtonQuinary
 	default:
 		return
 	}

io/pointer/pointer.go

@@ -220,7 +220,7 @@ const (
 	// ButtonTertiary is the tertiary button, usually the middle button.
 	ButtonTertiary
 	// ButtonQuaternary is the fourth button, usually used for browser
-	// navigation (back)
+	// navigation (backward)
 	ButtonQuaternary
 	// ButtonQuinary is the fifth button, usually used for browser
 	// navigation (forward)