Implement inverted prop.

README.md

@@ -18,6 +18,7 @@ A RecyclerView implementation for ReactNative, that overcomes some limitations o
 - **Control the scrolling velocity**: the `velocity` param in the `scrollToIndex` method is exactly for this
 - **Initial scroll index**: specify the scroll position at startup, and there will be no flicker
 - **Low memory usage**: it renders just the visible items plus some extra items around
+- **Supports both scroll direction**: use the `inverted` prop to invert the scroll direction
 
 ## Caveats
 
@@ -93,7 +94,8 @@ Prop name             | Description   | Type      | Default value
 `initialListSize`     | Number of items to render at startup. | int | 10
 `initialScrollIndex`  | Index of the item to scroll at startup | int | none
 `initialScrollOffset` | Offset of the scroll position at startup | int | none
-`itemAnimatorEnabled` | Whether animates items when they are added or removed | boolean | true
+`inverted`            | Reverses the scrolling direction; the first model from the data source is rendered at the bottom | boolean | false
+`itemAnimatorEnabled` | Whether animates items when they are added or removed | bool | true
 `ListHeaderComponent` | Component to render as header | component | none
 `ListFooterComponent` | Component to render as footer | component | none
 `ListEmptyComponent`  | Component to render in case of no items | component | none

android/src/main/java/com/github/godness84/RNRecyclerViewList/RecyclerViewBackedScrollView.java

@@ -452,6 +452,11 @@ public int calculateDtToFit(int viewStart, int viewEnd, int boxStart, int boxEnd
         this.getLayoutManager().startSmoothScroll(smoothScroller);
     }
 
+    public void setInverted(boolean inverted) {
+        LinearLayoutManager layoutManager = (LinearLayoutManager) getLayoutManager();
+        layoutManager.setReverseLayout(inverted);
+    }
+
     public void setItemAnimatorEnabled(boolean enabled) {
         if (enabled) {
             DefaultItemAnimator animator = new DefaultItemAnimator();

android/src/main/java/com/github/godness84/RNRecyclerViewList/RecyclerViewBackedScrollViewManager.java

@@ -75,6 +75,11 @@ public void setItemCount(RecyclerViewBackedScrollView parent, int itemCount) {
         parent.getAdapter().notifyDataSetChanged();
     }
 
+    @ReactProp(name = "inverted", defaultBoolean = false)
+    public void setInverted(RecyclerViewBackedScrollView parent, boolean inverted) {
+        parent.setInverted(inverted);
+    }
+
     @ReactProp(name = "itemAnimatorEnabled", defaultBoolean = true)
     public void setItemAnimatorEnabled(RecyclerViewBackedScrollView parent, boolean enabled) {
         parent.setItemAnimatorEnabled(enabled);

src/RecyclerViewList.js

@@ -56,6 +56,7 @@ class RecyclerView extends React.PureComponent {
     initialListSize: PropTypes.number,
     initialScrollIndex: PropTypes.number,
     initialScrollOffset: PropTypes.number,
+    inverted: PropTypes.bool,
     itemAnimatorEnabled: PropTypes.bool,
     ListHeaderComponent: PropTypes.element,
     ListFooterComponent: PropTypes.element,
@@ -68,6 +69,7 @@ class RecyclerView extends React.PureComponent {
     dataSource: new DataSource([], (item, i) => i),
     initialListSize: 10,
     windowSize: 30,
+    inverted: false,
     itemAnimatorEnabled: true,
   }