[clutter] evdev: Expose microsecond timestamps via the clutter evdev API

[Jonas Ådahl <jadahl src gnome org>]

commit 52e38d1ab7c0e13aee8bdd7695741faf2dbb12ef
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Dec 2 16:13:36 2015 +0800

    evdev: Expose microsecond timestamps via the clutter evdev API
    
    This is needed by Wayland compositors for certain types of events.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=752752

 clutter/evdev/clutter-device-manager-evdev.c |    7 ++++++
 clutter/evdev/clutter-evdev.h                |    3 ++
 clutter/evdev/clutter-event-evdev.c          |   31 ++++++++++++++++++++++++++
 clutter/evdev/clutter-input-device-evdev.h   |    3 ++
 4 files changed, 44 insertions(+), 0 deletions(-)
---
diff --git a/clutter/evdev/clutter-device-manager-evdev.c b/clutter/evdev/clutter-device-manager-evdev.c
index 1427dbb..53aa848 100644
--- a/clutter/evdev/clutter-device-manager-evdev.c
+++ b/clutter/evdev/clutter-device-manager-evdev.c
@@ -461,6 +461,7 @@ new_absolute_motion_event (ClutterInputDevice *input_device,
       y = CLAMP (y, 0.f, stage_height - 1);
     }
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->motion.time = us2ms (time_us);
   event->motion.stage = stage;
   event->motion.device = seat->core_pointer;
@@ -572,6 +573,7 @@ notify_discrete_scroll (ClutterInputDevice     *input_device,
 
   event = clutter_event_new (CLUTTER_SCROLL);
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->scroll.time = us2ms (time_us);
   event->scroll.stage = CLUTTER_STAGE (stage);
   event->scroll.device = seat->core_pointer;
@@ -616,6 +618,7 @@ notify_scroll (ClutterInputDevice       *input_device,
 
   event = clutter_event_new (CLUTTER_SCROLL);
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->scroll.time = us2ms (time_us);
   event->scroll.stage = CLUTTER_STAGE (stage);
   event->scroll.device = seat->core_pointer;
@@ -708,6 +711,7 @@ notify_button (ClutterInputDevice *input_device,
   else
     seat->button_state &= ~maskmap[button - BTN_LEFT];
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->button.time = us2ms (time_us);
   event->button.stage = CLUTTER_STAGE (stage);
   event->button.device = seat->core_pointer;
@@ -749,6 +753,7 @@ notify_touch_event (ClutterInputDevice *input_device,
 
   event = clutter_event_new (evtype);
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->touch.time = us2ms (time_us);
   event->touch.stage = CLUTTER_STAGE (stage);
   event->touch.device = seat->core_pointer;
@@ -796,6 +801,7 @@ notify_pinch_gesture_event (ClutterInputDevice          *input_device,
 
   clutter_input_device_get_coords (seat->core_pointer, NULL, &pos);
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->touchpad_pinch.phase = phase;
   event->touchpad_pinch.time = us2ms (time_us);
   event->touchpad_pinch.stage = CLUTTER_STAGE (stage);
@@ -839,6 +845,7 @@ notify_swipe_gesture_event (ClutterInputDevice          *input_device,
 
   event = clutter_event_new (CLUTTER_TOUCHPAD_SWIPE);
 
+  _clutter_evdev_event_set_time_usec (event, time_us);
   event->touchpad_swipe.phase = phase;
   event->touchpad_swipe.time = us2ms (time_us);
   event->touchpad_swipe.stage = CLUTTER_STAGE (stage);
diff --git a/clutter/evdev/clutter-evdev.h b/clutter/evdev/clutter-evdev.h
index 8278df8..dca093d 100644
--- a/clutter/evdev/clutter-evdev.h
+++ b/clutter/evdev/clutter-evdev.h
@@ -135,6 +135,9 @@ CLUTTER_AVAILABLE_IN_1_26
 guint32 clutter_evdev_event_get_event_code (const ClutterEvent *event);
 
 CLUTTER_AVAILABLE_IN_1_26
+guint64 clutter_evdev_event_get_time_usec (const ClutterEvent *event);
+
+CLUTTER_AVAILABLE_IN_1_26
 gboolean clutter_evdev_event_get_relative_motion (const ClutterEvent *event,
                                                   double             *dx,
                                                   double             *dy,
diff --git a/clutter/evdev/clutter-event-evdev.c b/clutter/evdev/clutter-event-evdev.c
index a0d66c9..c80a642 100644
--- a/clutter/evdev/clutter-event-evdev.c
+++ b/clutter/evdev/clutter-event-evdev.c
@@ -33,6 +33,8 @@ struct _ClutterEventEvdev
 {
   guint32 evcode;
 
+  guint64 time_usec;
+
   gboolean has_relative_motion;
   double dx;
   double dy;
@@ -87,6 +89,16 @@ _clutter_evdev_event_set_event_code (ClutterEvent *event,
 }
 
 void
+_clutter_evdev_event_set_time_usec       (ClutterEvent *event,
+                                          guint64       time_usec)
+{
+  ClutterEventEvdev *event_evdev;
+
+  event_evdev = clutter_evdev_event_ensure_platform_data (event);
+  event_evdev->time_usec = time_usec;
+}
+
+void
 _clutter_evdev_event_set_relative_motion (ClutterEvent *event,
                                           double        dx,
                                           double        dy,
@@ -124,6 +136,25 @@ clutter_evdev_event_get_event_code (const ClutterEvent *event)
 }
 
 /**
+ * clutter_evdev_event_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.
+ */
+guint64
+clutter_evdev_event_get_time_usec (const ClutterEvent *event)
+{
+  ClutterEventEvdev *event_evdev = _clutter_event_get_platform_data (event);
+
+  if (event_evdev)
+    return event_evdev->time_usec;
+
+  return 0;
+}
+
+/**
  * clutter_evdev_event_get_pointer_motion
  * @event: a #ClutterEvent
  *
diff --git a/clutter/evdev/clutter-input-device-evdev.h b/clutter/evdev/clutter-input-device-evdev.h
index dec3739..c5c3eff 100644
--- a/clutter/evdev/clutter-input-device-evdev.h
+++ b/clutter/evdev/clutter-input-device-evdev.h
@@ -91,6 +91,9 @@ void                      _clutter_event_evdev_free                   (ClutterEv
 void                      _clutter_evdev_event_set_event_code         (ClutterEvent      *event,
                                                                        guint32            evcode);
 
+void                      _clutter_evdev_event_set_time_usec       (ClutterEvent *event,
+                                                                   guint64       time_usec);
+
 void                     _clutter_evdev_event_set_relative_motion (ClutterEvent *event,
                                                                    double        dx,
                                                                    double        dy,