[gnome-shell/wip/exalm/gestures: 40/47] appDisplay: Don't allow mouse scrolling while animating

[Alexander Mikhaylenko <alexm src gnome org>]

commit 2ae586d8ae4a2c9722d5cf62e6246e786e82a947
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Wed Oct 16 12:30:14 2019 +0500

    appDisplay: Don't allow mouse scrolling while animating
    
    Prevent uncontrollably fast scrolling.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/issues/1338

 js/ui/appDisplay.js | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index e314a4f9b7..643f5c061e 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -601,6 +601,9 @@ var AllView = GObject.registerClass({
         if (this._swipeTracker.canHandleScrollEvent(event))
             return Clutter.EVENT_PROPAGATE;
 
+        if (this._animating)
+            return Clutter.EVENT_STOP;
+
         let direction = event.get_scroll_direction();
         if (direction == Clutter.ScrollDirection.UP)
             this.goToPage(this._grid.currentPage - 1);