JSY-4371 feat: 提供最后一行最后一列标记

src/base/collection/collection.js

@@ -156,7 +156,7 @@ BI.CollectionView = BI.inherit(BI.Widget, {
                     border[offset] = 0;
                 }
             };
-            var lastDatum = BI.last(BI.sortBy(childrenToDisplay, function (index, child) {
+            var lastDatum = BI.last(BI.sortBy(this._sectionManager.getAllCellMetadata(), function (index, child) {
                 return (child.x + child.width + child.y + child.height);
             }));
             for (var i = 0, len = childrenToDisplay.length; i < len; i++) {

src/core/structure/sectionManager.js

@@ -46,6 +46,10 @@
             });
         },
 
+        getAllCellMetadata: function () {
+            return this._cellMetadata;
+        },
+
         getCellMetadata: function (index) {
             return this._cellMetadata[index];
         },