Don't show underlay if no press handlers

Reviewed By: sahrens

Differential Revision: D2915003

fb-gh-sync-id: 56ba942ed464e393ea43229b1fa9ef6936a24ecc
shipit-source-id: 56ba942ed464e393ea43229b1fa9ef6936a24ecc

Libraries/Components/Touchable/TouchableHighlight.js

@@ -189,7 +189,7 @@ var TouchableHighlight = React.createClass({
   },
 
   _showUnderlay: function() {
-    if (!this.isMounted()) {
+    if (!this.isMounted() || !this._hasPressHandler()) {
       return;
     }
 
@@ -201,7 +201,7 @@ var TouchableHighlight = React.createClass({
   _hideUnderlay: function() {
     this.clearTimeout(this._hideTimeout);
     this._hideTimeout = null;
-    if (this.refs[UNDERLAY_REF]) {
+    if (this._hasPressHandler() && this.refs[UNDERLAY_REF]) {
       this.refs[CHILD_REF].setNativeProps(INACTIVE_CHILD_PROPS);
       this.refs[UNDERLAY_REF].setNativeProps({
         ...INACTIVE_UNDERLAY_PROPS,
@@ -211,6 +211,15 @@ var TouchableHighlight = React.createClass({
     }
   },
 
+  _hasPressHandler: function() {
+    return !!(
+      this.props.onPress || 
+      this.props.onPressIn || 
+      this.props.onPressOut || 
+      this.props.onLongPress
+    );
+  },
+
   render: function() {
     return (
       <View