Added events : OnBounce and beforeBounce

lib/ftscroller.js

@@ -381,7 +381,9 @@ var FTScroller, CubicBezier;
 			'segmentdidchange': [],
 			'reachedstart': [],
 			'reachedend': [],
-			'scrollinteractionend': []
+			'scrollinteractionend': [],
+			'onBounce': [],
+			'beforeBounce': []
 		};
 
 		// MutationObserver instance, when supported and if DOM change sniffing is enabled
@@ -1141,6 +1143,7 @@ var FTScroller, CubicBezier;
 
 					// Amend the positions and bezier curve if necessary
 					if (bounceDistance) {
+                        var bounceDistanceOrig = bounceDistance;
 
 						// If the fling moves the scroller beyond the normal scroll bounds, and
 						// the bounce is snapping the scroll back after the fling:
@@ -1235,6 +1238,7 @@ var FTScroller, CubicBezier;
 							bounceDistance = 0;
 							bounceDuration = 0;
 						}
+                        _fireEvent('onBounce', { bounceDistance: bounceDistanceOrig, flingPosition: flingPosition, bounceTarget: bounceTarget, movementSpeed: movementSpeed });
 					}
 
 					// If no fling or bounce is required, continue
@@ -1790,6 +1794,7 @@ var FTScroller, CubicBezier;
 		_setAxisPosition = function _setAxisPosition(axis, position, animationDuration, animationBezier, boundsCrossDelay) {
 			var transitionCSSString, newPositionAtExtremity = null;
 
+            _fireEvent('beforeBounce', { flingDistance: position });
 			// Only update position if the axis node exists (DOM elements can go away if
 			// the scroller instance is not destroyed correctly)
 			if (!_scrollNodes[axis]) {
@@ -2179,16 +2184,18 @@ var FTScroller, CubicBezier;
 		_onTouchStart = function _onTouchStart(startEvent) {
 			var i, l, touchEvent;
 
-			// If a touch is already active, ensure that the index
-			// is mapped to the correct finger, and return.
-			if (_inputIdentifier) {
-				for (i = 0, l = startEvent.touches.length; i < l; i = i + 1) {
-					if (startEvent.touches[i].identifier === _inputIdentifier) {
-						_inputIndex = i;
-					}
-				}
-				return;
-			}
+            startEvent.stopPropagation();
+
+            // If a touch is already active, ensure that the index
+            // is mapped to the correct finger, and return.
+            if (_inputIdentifier) {
+                for (i = 0, l = startEvent.touches.length; i < l; i = i + 1) {
+                    if (startEvent.touches[i].identifier === _inputIdentifier) {
+                        _inputIndex = i;
+                    }
+                }
+                return;
+            }
 
 			// Track the new touch's identifier, reset index, and pass
 			// the coordinates to the scroll start function.