Optional anchoring

package.json

@@ -1,6 +1,6 @@
 {
   "name": "recyclerlistview",
-  "version": "1.4.0-beta.9",
+  "version": "1.4.0-beta.10",
   "description": "The listview that you need and deserve. It was built for performance, uses cell recycling to achieve smooth scrolling.",
   "main": "dist/reactnative/index.js",
   "types": "dist/reactnative/index.d.ts",

src/core/RecyclerListView.tsx

@@ -361,7 +361,11 @@ export default class RecyclerListView<P extends RecyclerListViewProps, S extends
         if (forceFullRender || this.props.layoutProvider !== newProps.layoutProvider || this.props.isHorizontal !== newProps.isHorizontal) {
             //TODO:Talha use old layout manager
             this._virtualRenderer.setLayoutManager(newProps.layoutProvider.newLayoutManager(this._layout, newProps.isHorizontal));
-            this._virtualRenderer.refreshWithAnchor();
+            if (newProps.layoutProvider.shouldRefreshWithAnchoring) {
+                this._virtualRenderer.refreshWithAnchor();
+            } else {
+                this._virtualRenderer.refresh();
+            }
             this._refreshViewability();
         } else if (this.props.dataProvider !== newProps.dataProvider) {
             const layoutManager = this._virtualRenderer.getLayoutManager();

src/core/dependencies/LayoutProvider.ts

@@ -15,6 +15,9 @@ import { Layout, WrapGridLayoutManager, LayoutManager } from "../layoutmanager/L
  */
 
 export abstract class BaseLayoutProvider {
+    //Unset if your new layout provider doesn't require firstVisibleIndex preservation on application
+    public shouldRefreshWithAnchoring: boolean = true;
+
     //Return your layout manager, you get all required dependencies here. Also, make sure to use cachedLayouts. RLV might cache layouts and give back to
     //in cases of conxtext preservation. Make sure you use them if provided.
     public abstract newLayoutManager(renderWindowSize: Dimension, isHorizontal?: boolean, cachedLayouts?: Layout[]): LayoutManager;
@@ -34,8 +37,7 @@ export class LayoutProvider extends BaseLayoutProvider {
     private _tempDim: Dimension;
     private _lastLayoutManager: WrapGridLayoutManager | undefined;
 
-    constructor(getLayoutTypeForIndex: (index: number) => string | number,
-                setLayoutForType: (type: string | number, dim: Dimension, index: number) => void) {
+    constructor(getLayoutTypeForIndex: (index: number) => string | number, setLayoutForType: (type: string | number, dim: Dimension, index: number) => void) {
         super();
         this._getLayoutTypeForIndex = getLayoutTypeForIndex;
         this._setLayoutForType = setLayoutForType;