clutter: Move relative motion information to ClutterEvent

Instead of using native backend platform data specifically, store
this info in ClutterMotionEvent. This includes time in usec since
it's just used for motion events, in the future it could make sense
to make these general to all events again, but it could make sense
to make ClutterEvent structs private before.

In order to express that a motion event has relative motion info,
the CLUTTER_EVENT_FLAG_RELATIVE_MOTION event flag has been added
for it.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1623>

7 files changed, 78 insertions, 139 deletions

diff --git a/clutter/clutter/clutter-enums.h b/clutter/clutter/clutter-enums.h
index c03f47b6a..458d0fd2c 100644
--- a/clutter/clutter/clutter-enums.h
+++ b/clutter/clutter/clutter-enums.h
@@ -802,7 +802,8 @@ typedef enum /*< flags prefix=CLUTTER_EVENT >*/
   CLUTTER_EVENT_NONE              = 0,
   CLUTTER_EVENT_FLAG_SYNTHETIC    = 1 << 0,
   CLUTTER_EVENT_FLAG_INPUT_METHOD = 1 << 1,
-  CLUTTER_EVENT_FLAG_REPEATED     = 1 << 2
+  CLUTTER_EVENT_FLAG_REPEATED     = 1 << 2,
+  CLUTTER_EVENT_FLAG_RELATIVE_MOTION = 1 << 3,
 } ClutterEventFlags;
 
 /**
diff --git a/clutter/clutter/clutter-event.c b/clutter/clutter/clutter-event.c
index 19ec29f32..5f29507b2 100644
--- a/clutter/clutter/clutter-event.c
+++ b/clutter/clutter/clutter-event.c
@@ -2142,3 +2142,37 @@ clutter_event_sequence_get_slot (const ClutterEventSequence *sequence)
 
   return GPOINTER_TO_INT (sequence) - 1;
 }
+
+int64_t
+clutter_event_get_time_us (const ClutterEvent *event)
+{
+  if (event->type == CLUTTER_MOTION)
+    return event->motion.time_us;
+
+  return 0;
+}
+
+gboolean
+clutter_event_get_relative_motion (const ClutterEvent *event,
+                                   double             *dx,
+                                   double             *dy,
+                                   double             *dx_unaccel,
+                                   double             *dy_unaccel)
+{
+  if (event->type == CLUTTER_MOTION &&
+      event->motion.flags & CLUTTER_EVENT_FLAG_RELATIVE_MOTION)
+    {
+      if (dx)
+        *dx = event->motion.dx;
+      if (dy)
+        *dy = event->motion.dy;
+      if (dx_unaccel)
+        *dx_unaccel = event->motion.dx_unaccel;
+      if (dy_unaccel)
+        *dy_unaccel = event->motion.dy_unaccel;
+
+      return TRUE;
+    }
+  else
+    return FALSE;
+}
diff --git a/clutter/clutter/clutter-event.h b/clutter/clutter/clutter-event.h
index 7c3d36463..1974c4fbe 100644
--- a/clutter/clutter/clutter-event.h
+++ b/clutter/clutter/clutter-event.h
@@ -307,6 +307,12 @@ struct _ClutterMotionEvent
   ClutterModifierType modifier_state;
   gdouble *axes; /* Future use */
   ClutterInputDevice *device;
+
+  int64_t time_us;
+  double dx;
+  double dy;
+  double dx_unaccel;
+  double dy_unaccel;
 };
 
 /**
@@ -791,6 +797,16 @@ uint32_t                 clutter_event_get_event_code                (const Clut
 CLUTTER_EXPORT
 int32_t                  clutter_event_sequence_get_slot (const ClutterEventSequence *sequence);
 
+CLUTTER_EXPORT
+int64_t                  clutter_event_get_time_us (const ClutterEvent *event);
+CLUTTER_EXPORT
+gboolean                 clutter_event_get_relative_motion (const ClutterEvent *event,
+                                                            double             *dx,
+                                                            double             *dy,
+                                                            double             *dx_unaccel,
+                                                            double             *dy_unaccel);
+
+
 G_END_DECLS
 
 #endif /* __CLUTTER_EVENT_H__ */
diff --git a/src/backends/native/meta-event-native.c b/src/backends/native/meta-event-native.c
index 8d59e6287..c273176b4 100644
--- a/src/backends/native/meta-event-native.c
+++ b/src/backends/native/meta-event-native.c
@@ -37,12 +37,6 @@ struct _MetaEventNative
   double dy_unaccel;
 };
 
-static MetaEventNative *
-meta_event_native_new (void)
-{
-  return g_slice_new0 (MetaEventNative);
-}
-
 MetaEventNative *
 meta_event_native_copy (MetaEventNative *event_evdev)
 {
@@ -58,99 +52,3 @@ meta_event_native_free (MetaEventNative *event_evdev)
   if (event_evdev != NULL)
     g_slice_free (MetaEventNative, event_evdev);
 }
-
-static MetaEventNative *
-meta_event_native_ensure_platform_data (ClutterEvent *event)
-{
-  MetaEventNative *event_evdev = _clutter_event_get_platform_data (event);
-
-  if (!event_evdev)
-    {
-      event_evdev = meta_event_native_new ();
-      _clutter_event_set_platform_data (event, event_evdev);
-    }
-
-  return event_evdev;
-}
-
-void
-meta_event_native_set_time_usec (ClutterEvent *event,
-                                 uint64_t      time_usec)
-{
-  MetaEventNative *event_evdev;
-
-  event_evdev = meta_event_native_ensure_platform_data (event);
-  event_evdev->time_usec = time_usec;
-}
-
-void
-meta_event_native_set_relative_motion (ClutterEvent *event,
-                                       double        dx,
-                                       double        dy,
-                                       double        dx_unaccel,
-                                       double        dy_unaccel)
-{
-  MetaEventNative *event_evdev;
-
-  event_evdev = meta_event_native_ensure_platform_data (event);
-  event_evdev->dx = dx;
-  event_evdev->dy = dy;
-  event_evdev->dx_unaccel = dx_unaccel;
-  event_evdev->dy_unaccel = dy_unaccel;
-  event_evdev->has_relative_motion = TRUE;
-}
-
-/**
- * meta_event_native_get_time_usec:
- * @event: a #ClutterEvent
- *
- * Returns the time in microsecond granularity, or 0 if unavailable.
- *
- * Returns: The time in microsecond granularity, or 0 if unavailable.
- */
-uint64_t
-meta_event_native_get_time_usec (const ClutterEvent *event)
-{
-  MetaEventNative *event_evdev = _clutter_event_get_platform_data (event);
-
-  if (event_evdev)
-    return event_evdev->time_usec;
-
-  return 0;
-}
-
-/**
- * meta_event_get_pointer_motion
- * @event: a #ClutterEvent
- *
- * If available, the normal and unaccelerated motion deltas are written
- * to the dx, dy, dx_unaccel and dy_unaccel and TRUE is returned.
- *
- * If unavailable, FALSE is returned.
- *
- * Returns: TRUE on success, otherwise FALSE.
- **/
-gboolean
-meta_event_native_get_relative_motion (const ClutterEvent *event,
-                                       double             *dx,
-                                       double             *dy,
-                                       double             *dx_unaccel,
-                                       double             *dy_unaccel)
-{
-  MetaEventNative *event_evdev = _clutter_event_get_platform_data (event);
-
-  if (event_evdev && event_evdev->has_relative_motion)
-    {
-      if (dx)
-        *dx = event_evdev->dx;
-      if (dy)
-        *dy = event_evdev->dy;
-      if (dx_unaccel)
-        *dx_unaccel = event_evdev->dx_unaccel;
-      if (dy_unaccel)
-        *dy_unaccel = event_evdev->dy_unaccel;
-      return TRUE;
-    }
-  else
-    return FALSE;
-}
diff --git a/src/backends/native/meta-seat-impl.c b/src/backends/native/meta-seat-impl.c
index bc68e0e99..21d50984c 100644
--- a/src/backends/native/meta-seat-impl.c
+++ b/src/backends/native/meta-seat-impl.c
@@ -504,7 +504,7 @@ new_absolute_motion_event (MetaSeatImpl       *seat_impl,
                                         &x, &y);
     }
 
-  meta_event_native_set_time_usec (event, time_us);
+  event->motion.time_us = time_us;
   event->motion.time = us2ms (time_us);
   meta_xkb_translate_state (event, seat_impl->xkb, seat_impl->button_state);
   event->motion.x = x;
@@ -577,9 +577,11 @@ meta_seat_impl_notify_relative_motion_in_impl (MetaSeatImpl       *seat_impl,
   event = new_absolute_motion_event (seat_impl, input_device,
                                      time_us, new_x, new_y, NULL);
 
-  meta_event_native_set_relative_motion (event,
-                                         dx, dy,
-                                         dx_unaccel, dy_unaccel);
+  event->motion.flags |= CLUTTER_EVENT_FLAG_RELATIVE_MOTION;
+  event->motion.dx = dx;
+  event->motion.dy = dy;
+  event->motion.dx_unaccel = dx_unaccel;
+  event->motion.dy_unaccel = dy_unaccel;
 
   queue_event (seat_impl, event);
 }
@@ -680,7 +682,6 @@ meta_seat_impl_notify_button_in_impl (MetaSeatImpl       *seat_impl,
         seat_impl->button_state &= ~maskmap[button_nr - 1];
     }
 
-  meta_event_native_set_time_usec (event, time_us);
   event->button.time = us2ms (time_us);
   meta_xkb_translate_state (event, seat_impl->xkb, seat_impl->button_state);
   event->button.button = button_nr;
@@ -752,7 +753,6 @@ notify_scroll (ClutterInputDevice       *input_device,
 
   event = clutter_event_new (CLUTTER_SCROLL);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->scroll.time = us2ms (time_us);
   meta_xkb_translate_state (event, seat_impl->xkb, seat_impl->button_state);
 
@@ -794,7 +794,6 @@ notify_discrete_scroll (ClutterInputDevice     *input_device,
 
   event = clutter_event_new (CLUTTER_SCROLL);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->scroll.time = us2ms (time_us);
   meta_xkb_translate_state (event, seat_impl->xkb, seat_impl->button_state);
 
@@ -917,7 +916,6 @@ meta_seat_impl_notify_touch_event_in_impl (MetaSeatImpl       *seat_impl,
 
   event = clutter_event_new (evtype);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->touch.time = us2ms (time_us);
   event->touch.x = x;
   event->touch.y = y;
@@ -1216,7 +1214,10 @@ notify_relative_tool_motion_in_impl (ClutterInputDevice *input_device,
 
   event = new_absolute_motion_event (seat_impl, input_device, time_us,
                                      x, y, axes);
-  meta_event_native_set_relative_motion (event, dx, dy, 0, 0);
+
+  event->motion.flags |= CLUTTER_EVENT_FLAG_RELATIVE_MOTION;
+  event->motion.dx = dx;
+  event->motion.dy = dy;
 
   queue_event (seat_impl, event);
 }
@@ -1242,7 +1243,6 @@ notify_pinch_gesture_event (ClutterInputDevice          *input_device,
                                                &event->touchpad_pinch.x,
                                                &event->touchpad_pinch.y);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->touchpad_pinch.phase = phase;
   event->touchpad_pinch.time = us2ms (time_us);
   event->touchpad_pinch.dx = dx;
@@ -1274,7 +1274,6 @@ notify_swipe_gesture_event (ClutterInputDevice          *input_device,
 
   event = clutter_event_new (CLUTTER_TOUCHPAD_SWIPE);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->touchpad_swipe.phase = phase;
   event->touchpad_swipe.time = us2ms (time_us);
 
@@ -1310,8 +1309,6 @@ notify_proximity (ClutterInputDevice *input_device,
   else
     event = clutter_event_new (CLUTTER_PROXIMITY_OUT);
 
-  meta_event_native_set_time_usec (event, time_us);
-
   event->proximity.time = us2ms (time_us);
   clutter_event_set_device_tool (event, device_native->last_tool);
   clutter_event_set_device (event, seat_impl->core_pointer);
@@ -1338,7 +1335,6 @@ notify_pad_button (ClutterInputDevice *input_device,
   else
     event = clutter_event_new (CLUTTER_PAD_BUTTON_RELEASE);
 
-  meta_event_native_set_time_usec (event, time_us);
   event->pad_button.button = button;
   event->pad_button.group = mode_group;
   event->pad_button.mode = mode;
@@ -1370,7 +1366,6 @@ notify_pad_strip (ClutterInputDevice *input_device,
     source = CLUTTER_INPUT_DEVICE_PAD_SOURCE_UNKNOWN;
 
   event = clutter_event_new (CLUTTER_PAD_STRIP);
-  meta_event_native_set_time_usec (event, time_us);
   event->pad_strip.strip_source = source;
   event->pad_strip.strip_number = strip_number;
   event->pad_strip.value = value;
@@ -1404,7 +1399,6 @@ notify_pad_ring (ClutterInputDevice *input_device,
     source = CLUTTER_INPUT_DEVICE_PAD_SOURCE_UNKNOWN;
 
   event = clutter_event_new (CLUTTER_PAD_RING);
-  meta_event_native_set_time_usec (event, time_us);
   event->pad_ring.ring_source = source;
   event->pad_ring.ring_number = ring_number;
   event->pad_ring.angle = angle;
diff --git a/src/backends/native/meta-seat-native.c b/src/backends/native/meta-seat-native.c
index 73abb9052..f56be6627 100644
--- a/src/backends/native/meta-seat-native.c
+++ b/src/backends/native/meta-seat-native.c
@@ -375,19 +375,20 @@ meta_seat_native_compress_motion (ClutterSeat        *seat,
   double dst_dx = 0.0, dst_dy = 0.0;
   double dst_dx_unaccel = 0.0, dst_dy_unaccel = 0.0;
 
-  if (!meta_event_native_get_relative_motion (to_discard,
-                                              &dx, &dy,
-                                              &dx_unaccel, &dy_unaccel))
+  if (!clutter_event_get_relative_motion (to_discard,
+                                          &dx, &dy,
+                                          &dx_unaccel, &dy_unaccel))
     return;
 
-  meta_event_native_get_relative_motion (event,
-                                         &dst_dx, &dst_dy,
-                                         &dst_dx_unaccel, &dst_dy_unaccel);
-  meta_event_native_set_relative_motion (event,
-                                         dx + dst_dx,
-                                         dy + dst_dy,
-                                         dx_unaccel + dst_dx_unaccel,
-                                         dy_unaccel + dst_dy_unaccel);
+  clutter_event_get_relative_motion (event,
+                                     &dst_dx, &dst_dy,
+                                     &dst_dx_unaccel, &dst_dy_unaccel);
+
+  event->motion.flags |= CLUTTER_EVENT_FLAG_RELATIVE_MOTION;
+  event->motion.dx = dx + dst_dx;
+  event->motion.dy = dy + dst_dy;
+  event->motion.dx_unaccel = dx_unaccel + dst_dx_unaccel;
+  event->motion.dy_unaccel = dy_unaccel + dst_dy_unaccel;
 }
 
 static void
diff --git a/src/wayland/meta-wayland-pointer.c b/src/wayland/meta-wayland-pointer.c
index b22f401d1..2a6bce4e7 100644
--- a/src/wayland/meta-wayland-pointer.c
+++ b/src/wayland/meta-wayland-pointer.c
@@ -66,7 +66,6 @@
 
 #ifdef HAVE_NATIVE_BACKEND
 #include "backends/native/meta-backend-native.h"
-#include "backends/native/meta-event-native.h"
 #endif
 
 #include "relative-pointer-unstable-v1-server-protocol.h"
@@ -286,7 +285,6 @@ void
 meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
                                            const ClutterEvent *event)
 {
-#ifdef HAVE_NATIVE_BACKEND
   struct wl_resource *resource;
   double dx, dy;
   double dx_unaccel, dy_unaccel;
@@ -295,18 +293,16 @@ meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
   uint32_t time_us_lo;
   wl_fixed_t dxf, dyf;
   wl_fixed_t dx_unaccelf, dy_unaccelf;
-  MetaBackend *backend = meta_get_backend ();
 
   if (!pointer->focus_client)
     return;
 
-  if (!META_IS_BACKEND_NATIVE (backend) ||
-      !meta_event_native_get_relative_motion (event,
-                                              &dx, &dy,
-                                              &dx_unaccel, &dy_unaccel))
+  if (!clutter_event_get_relative_motion (event,
+                                          &dx, &dy,
+                                          &dx_unaccel, &dy_unaccel))
     return;
 
-  time_us = meta_event_native_get_time_usec (event);
+  time_us = clutter_event_get_time_us (event);
   if (time_us == 0)
     time_us = clutter_event_get_time (event) * 1000ULL;
   time_us_hi = (uint32_t) (time_us >> 32);
@@ -327,7 +323,6 @@ meta_wayland_pointer_send_relative_motion (MetaWaylandPointer *pointer,
                                                     dx_unaccelf,
                                                     dy_unaccelf);
     }
-#endif
 }
 
 void