selftests/hid: tablets: move move_to function to PenDigitizer

We can easily subclass PenDigitizer for introducing firmware bugs when
subclassing Pen is harder.

Move move_to from Pen to PenDigitizer so we get that ability

Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Acked-by: Jiri Kosina <jkosina@suse.com>
Link: https://lore.kernel.org/r/20231206-wip-selftests-v2-6-c0350c2f5986@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>

Author: Benjamin Tissoires

tools/testing/selftests/hid/tests/test_tablet.py

@@ -282,7 +282,7 @@ def __init__(self, x, y):
         self._old_values = None
         self.current_state = None
 
-    def _restore(self):
+    def restore(self):
         if self._old_values is not None:
             for i in [
                 "x",
@@ -297,50 +297,8 @@ def _restore(self):
             ]:
                 setattr(self, i, getattr(self._old_values, i))
 
-    def move_to(self, state):
-        # fill in the previous values
-        if self.current_state == PenState.PEN_IS_OUT_OF_RANGE:
-            self._restore()
-
-        print(f"\n  *** pen is moving to {state} ***")
-
-        if state == PenState.PEN_IS_OUT_OF_RANGE:
-            self._old_values = copy.copy(self)
-            self.x = 0
-            self.y = 0
-            self.tipswitch = False
-            self.tippressure = 0
-            self.azimuth = 0
-            self.inrange = False
-            self.width = 0
-            self.height = 0
-            self.invert = False
-            self.eraser = False
-            self.x_tilt = 0
-            self.y_tilt = 0
-            self.twist = 0
-        elif state == PenState.PEN_IS_IN_RANGE:
-            self.tipswitch = False
-            self.inrange = True
-            self.invert = False
-            self.eraser = False
-        elif state == PenState.PEN_IS_IN_CONTACT:
-            self.tipswitch = True
-            self.inrange = True
-            self.invert = False
-            self.eraser = False
-        elif state == PenState.PEN_IS_IN_RANGE_WITH_ERASING_INTENT:
-            self.tipswitch = False
-            self.inrange = True
-            self.invert = True
-            self.eraser = False
-        elif state == PenState.PEN_IS_ERASING:
-            self.tipswitch = False
-            self.inrange = True
-            self.invert = True
-            self.eraser = True
-
-        self.current_state = state
+    def backup(self):
+        self._old_values = copy.copy(self)
 
     def __assert_axis(self, evdev, axis, value):
         if (
@@ -384,6 +342,51 @@ def __init__(
                     continue
                 self.fields = [f.usage_name for f in r]
 
+    def move_to(self, pen, state):
+        # fill in the previous values
+        if pen.current_state == PenState.PEN_IS_OUT_OF_RANGE:
+            pen.restore()
+
+        print(f"\n  *** pen is moving to {state} ***")
+
+        if state == PenState.PEN_IS_OUT_OF_RANGE:
+            pen.backup()
+            pen.x = 0
+            pen.y = 0
+            pen.tipswitch = False
+            pen.tippressure = 0
+            pen.azimuth = 0
+            pen.inrange = False
+            pen.width = 0
+            pen.height = 0
+            pen.invert = False
+            pen.eraser = False
+            pen.x_tilt = 0
+            pen.y_tilt = 0
+            pen.twist = 0
+        elif state == PenState.PEN_IS_IN_RANGE:
+            pen.tipswitch = False
+            pen.inrange = True
+            pen.invert = False
+            pen.eraser = False
+        elif state == PenState.PEN_IS_IN_CONTACT:
+            pen.tipswitch = True
+            pen.inrange = True
+            pen.invert = False
+            pen.eraser = False
+        elif state == PenState.PEN_IS_IN_RANGE_WITH_ERASING_INTENT:
+            pen.tipswitch = False
+            pen.inrange = True
+            pen.invert = True
+            pen.eraser = False
+        elif state == PenState.PEN_IS_ERASING:
+            pen.tipswitch = False
+            pen.inrange = True
+            pen.invert = True
+            pen.eraser = True
+
+        pen.current_state = state
+
     def event(self, pen):
         rs = []
         r = self.create_report(application=self.cur_application, data=pen)
@@ -462,7 +465,7 @@ def _test_states(self, state_list, scribble):
             cur_state = PenState.PEN_IS_OUT_OF_RANGE
 
             p = Pen(50, 60)
-            p.move_to(PenState.PEN_IS_OUT_OF_RANGE)
+            uhdev.move_to(p, PenState.PEN_IS_OUT_OF_RANGE)
             events = self.post(uhdev, p)
             self.validate_transitions(cur_state, p, evdev, events)
 
@@ -475,7 +478,7 @@ def _test_states(self, state_list, scribble):
                     events = self.post(uhdev, p)
                     self.validate_transitions(cur_state, p, evdev, events)
                     assert len(events) >= 3  # X, Y, SYN
-                p.move_to(state)
+                uhdev.move_to(p, state)
                 if scribble and state != PenState.PEN_IS_OUT_OF_RANGE:
                     p.x += 1
                     p.y -= 1