Add support for maintaining ordinal values through GestureRecognizer

ui/base/gestures/gesture_sequence.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/gestures/gesture_sequence.h"
 
 #include <cmath>
 #include <stdlib.h>
 
 #include "base/command_line.h"
@@ skipping 728 matching lines @@
   if (scroll_type_ == ST_HORIZONTAL)
     railed_y_velocity = 0;
   else if (scroll_type_ == ST_VERTICAL)
     railed_x_velocity = 0;
 
   if (railed_x_velocity != 0 || railed_y_velocity != 0) {
 
     gestures->push_back(CreateGestureEvent(
         GestureEventDetails(ui::ET_SCROLL_FLING_START,
             CalibrateFlingVelocity(railed_x_velocity),
-            CalibrateFlingVelocity(railed_y_velocity)),
+            CalibrateFlingVelocity(railed_y_velocity),
+            CalibrateFlingVelocity(x_velocity),
+            CalibrateFlingVelocity(y_velocity)),
         location,
         flags_,
         base::Time::FromDoubleT(point.last_touch_time()),
         1 << point.touch_id()));
   } else {
     gestures->push_back(CreateGestureEvent(
         GestureEventDetails(ui::ET_GESTURE_SCROLL_END, 0, 0),
         location,
         flags_,
         base::Time::FromDoubleT(point.last_touch_time()),
@@ skipping 22 matching lines @@
     d -= last_scroll_prediction_offset_;
     last_scroll_prediction_offset_.set_x(
         GestureConfiguration::scroll_prediction_seconds() * point.XVelocity());
     last_scroll_prediction_offset_.set_y(
         GestureConfiguration::scroll_prediction_seconds() * point.YVelocity());
     d += last_scroll_prediction_offset_;
     location += gfx::Vector2d(last_scroll_prediction_offset_.x(),
                               last_scroll_prediction_offset_.y());
   }
 
+  gfx::Vector2dF o = d;
+
   if (scroll_type_ == ST_HORIZONTAL)
     d.set_y(0);
   else if (scroll_type_ == ST_VERTICAL)
     d.set_x(0);
   if (d.IsZero())
     return;
 
-  GestureEventDetails details(ui::ET_GESTURE_SCROLL_UPDATE, d.x(), d.y());
+  GestureEventDetails details(ui::ET_GESTURE_SCROLL_UPDATE,
+                              d.x(), d.y(), o.x(), o.y());
   details.SetScrollVelocity(
       scroll_type_ == ST_VERTICAL ? 0 : point.XVelocity(),
-      scroll_type_ == ST_HORIZONTAL ? 0 : point.YVelocity());
+      scroll_type_ == ST_HORIZONTAL ? 0 : point.YVelocity(),
+      point.XVelocity(),
+      point.YVelocity());
   gestures->push_back(CreateGestureEvent(
       details,
       location,
       flags_,
       base::Time::FromDoubleT(point.last_touch_time()),
       ComputeTouchBitmask(points_)));
 }
 
 void GestureSequence::AppendPinchGestureBegin(const GesturePoint& p1,
                                               const GesturePoint& p2,
@@ skipping 357 matching lines @@
     return;
 
   // Since long press timer has been started, there should be a non-NULL point.
   const GesturePoint* point = GetPointByPointId(0);
   if (!ui::gestures::IsInsideManhattanSquare(point->first_touch_position(),
       event.location()))
     GetLongPressTimer()->Stop();
 }
 
 }  // namespace ui