[clutter] stage: implement touch event throttling

[Lionel Landwerlin <llandwerlin src gnome org>]

commit 90c05e98a8cbf3748758af5a11dfa129d8334c46
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Wed Oct 9 18:35:59 2013 +0100

    stage: implement touch event throttling
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709761

 clutter/clutter-stage.c |   38 +++++++++++++++++++++++++-------------
 1 files changed, 25 insertions(+), 13 deletions(-)
---
diff --git a/clutter/clutter-stage.c b/clutter/clutter-stage.c
index 9939628..d641180 100644
--- a/clutter/clutter-stage.c
+++ b/clutter/clutter-stage.c
@@ -921,19 +921,31 @@ _clutter_stage_process_queued_events (ClutterStage *stage)
         check_device = TRUE;
 
       /* Skip consecutive motion events coming from the same device */
-      if (priv->throttle_motion_events &&
-          next_event != NULL &&
-         event->type == CLUTTER_MOTION &&
-         (next_event->type == CLUTTER_MOTION ||
-          next_event->type == CLUTTER_LEAVE) &&
-          (!check_device || (device == next_device)))
-       {
-          CLUTTER_NOTE (EVENT,
-                        "Omitting motion event at %d, %d",
-                        (int) event->motion.x,
-                        (int) event->motion.y);
-          goto next_event;
-       }
+      if (priv->throttle_motion_events && next_event != NULL)
+        {
+          if (event->type == CLUTTER_MOTION &&
+              (next_event->type == CLUTTER_MOTION ||
+               next_event->type == CLUTTER_LEAVE) &&
+              (!check_device || (device == next_device)))
+            {
+              CLUTTER_NOTE (EVENT,
+                            "Omitting motion event at %d, %d",
+                            (int) event->motion.x,
+                            (int) event->motion.y);
+              goto next_event;
+            }
+          else if (event->type == CLUTTER_TOUCH_UPDATE &&
+                   (next_event->type == CLUTTER_TOUCH_UPDATE ||
+                    next_event->type == CLUTTER_LEAVE) &&
+                   (!check_device || (device == next_device)))
+            {
+              CLUTTER_NOTE (EVENT,
+                            "Omitting touch update event at %d, %d",
+                            (int) event->touch.x,
+                            (int) event->touch.y);
+              goto next_event;
+            }
+        }
 
       _clutter_process_event (event);