[ASCellNode] focusStyle mapping (#727)

* [ASCellNode] Adds mapping for UITableViewCell focusStyle

* Update CHANGELOG.md

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## master
 * Add your own contributions to the next release on the line below this with your name.
+- [ASCellNode] Adds mapping for UITableViewCell focusStyle [Alex Hill](https://github.com/alexhillc) [#727](https://github.com/TextureGroup/Texture/pull/727)
 - [ASNetworkImageNode] Fix capturing self in the block while loading image in ASNetworkImageNode. [Denis Mororozov](https://github.com/morozkin) [#777](https://github.com/TextureGroup/Texture/pull/777)
 - [ASTraitCollection] Add new properties of UITraitCollection to ASTraitCollection. [Yevgen Pogribnyi](https://github.com/ypogribnyi)
 - [ASRectMap] Replace implementation of ASRectTable with a simpler one based on unordered_map.[Scott Goodson](https://github.com/appleguy) [#719](https://github.com/TextureGroup/Texture/pull/719)

Source/ASCellNode.h

@@ -190,6 +190,12 @@ typedef NS_ENUM(NSUInteger, ASCellNodeVisibilityEvent) {
  */
 @property (nonatomic) UITableViewCellSelectionStyle selectionStyle;
 
+/* @abstract The focus style when a cell is focused
+ * @default UITableViewCellFocusStyleDefault
+ * ASTableView uses these properties when configuring UITableViewCells that host ASCellNodes.
+ */
+@property (nonatomic) UITableViewCellFocusStyle focusStyle;
+
 /* @abstract The view used as the background of the cell when it is selected.
  * ASTableView uses these properties when configuring UITableViewCells that host ASCellNodes.
  * ASCollectionView uses these properties when configuring UICollectionViewCells that host ASCellNodes.

Source/ASCellNode.mm

@@ -58,6 +58,7 @@
 
   // Use UITableViewCell defaults
   _selectionStyle = UITableViewCellSelectionStyleDefault;
+  _focusStyle = UITableViewCellFocusStyleDefault;
   self.clipsToBounds = YES;
 
   return self;

Source/ASTableView.mm

@@ -114,10 +114,10 @@ static NSString * const kCellReuseIdentifier = @"_ASTableViewCell";
   
   if (node) {
     self.backgroundColor = node.backgroundColor;
-    self.selectionStyle = node.selectionStyle;
     self.selectedBackgroundView = node.selectedBackgroundView;
     self.separatorInset = node.separatorInset;
     self.selectionStyle = node.selectionStyle; 
+    self.focusStyle = node.focusStyle;
     self.accessoryType = node.accessoryType;
     
     // the following ensures that we clip the entire cell to it's bounds if node.clipsToBounds is set (the default)