HACK: Fixing major persistence regression associated with extra screen to the left

-> Also adding ability to delete shortcuts.

Change-Id: I263baf813eae9089f11288494d575a99f0e859c3

src/com/android/launcher3/DeleteDropTarget.java

@@ -128,13 +128,18 @@ public class DeleteDropTarget extends ButtonDropTarget {
 
     @Override
     public boolean acceptDrop(DragObject d) {
-        // We can remove everything including App shortcuts, folders, widgets, etc.
-        if ((d.dragInfo instanceof LauncherAppWidgetInfo) ||
-                (d.dragInfo instanceof PendingAddWidgetInfo)) {
-            return true;
-        } else {
-            return false;
+        return willAcceptDrop(d.dragInfo);
+    }
+
+    public static boolean willAcceptDrop(Object info) {
+        if (info instanceof ItemInfo) {
+            ItemInfo item = (ItemInfo) info;
+            if (item.itemType == LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET ||
+                    item.itemType == LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT) {
+                return true;
+            }
         }
+        return false;
     }
 
     @Override
@@ -149,9 +154,7 @@ public class DeleteDropTarget extends ButtonDropTarget {
 
         // If we are dragging an application from AppsCustomize, only show the control if we can
         // delete the app (it was downloaded), and rename the string to "uninstall" in such a case
-
-        if ((info instanceof LauncherAppWidgetInfo) ||
-                (info instanceof PendingAddWidgetInfo)) {
+        if (willAcceptDrop(info)) {
             isVisible = true;
         } else {
             isVisible = false;