Added support for onTouchTap events, eliminating 300ms delay on iOS.

Basically, this is merge-in of https://github.com/zilverline/react-tap-event-plugin
project, with incorporated @s0meone's fix for duplicate tap events.
See also facebook#436

src/browser/eventPlugins/TapEventPlugin.js

@@ -25,12 +25,24 @@ var topLevelTypes = EventConstants.topLevelTypes;
 var isStartish = EventPluginUtils.isStartish;
 var isEndish = EventPluginUtils.isEndish;
 
+var isTouch = function(topLevelType) {
+  var touchTypes = [
+    topLevelTypes.topTouchCancel,
+    topLevelTypes.topTouchEnd,
+    topLevelTypes.topTouchStart,
+    topLevelTypes.topTouchMove
+  ];
+  return touchTypes.indexOf(topLevelType) >= 0;
+}
+
 /**
  * Number of pixels that are tolerated in between a `touchStart` and `touchEnd`
  * in order to still be considered a 'tap' event.
  */
 var tapMoveThreshold = 10;
+var ignoreMouseThreshold = 750;
 var startCoords = {x: null, y: null};
+var lastTouchEvent = null;
 
 var Axis = {
   x: {page: 'pageX', client: 'clientX', envScroll: 'currentPageScrollLeft'},
@@ -85,6 +97,8 @@ var TapEventPlugin = {
 
   tapMoveThreshold: tapMoveThreshold,
 
+  ignoreMouseThreshold: ignoreMouseThreshold,
+
   eventTypes: eventTypes,
 
   /**
@@ -100,6 +114,15 @@ var TapEventPlugin = {
       topLevelTarget,
       topLevelTargetID,
       nativeEvent) {
+
+    if (isTouch(topLevelType)) {
+      lastTouchEvent = nativeEvent.timeStamp;
+    } else {
+      if (lastTouchEvent && (nativeEvent.timeStamp - lastTouchEvent) < ignoreMouseThreshold) {
+        return null;
+      }
+    }
+
     if (!isStartish(topLevelType) && !isEndish(topLevelType)) {
       return null;
     }

src/browser/ui/ReactDefaultInjection.js

@@ -37,6 +37,8 @@ var ReactInjection = require('ReactInjection');
 var ReactInstanceHandles = require('ReactInstanceHandles');
 var ReactMount = require('ReactMount');
 var SelectEventPlugin = require('SelectEventPlugin');
+var TapEventPlugin = require('TapEventPlugin');
+var ResponderEventPlugin = require('ResponderEventPlugin');
 var ServerReactRootIndex = require('ServerReactRootIndex');
 var SimpleEventPlugin = require('SimpleEventPlugin');
 var SVGDOMPropertyConfig = require('SVGDOMPropertyConfig');
@@ -66,6 +68,8 @@ function inject() {
     CompositionEventPlugin: CompositionEventPlugin,
     MobileSafariClickEventPlugin: MobileSafariClickEventPlugin,
     SelectEventPlugin: SelectEventPlugin,
+    ResponderEventPlugin: ResponderEventPlugin,
+    TapEventPlugin: TapEventPlugin,
     BeforeInputEventPlugin: BeforeInputEventPlugin
   });
 

src/event/EventPluginUtils.js

@@ -211,7 +211,7 @@ var EventPluginUtils = {
   executeDispatchesInOrderStopAtTrue: executeDispatchesInOrderStopAtTrue,
   hasDispatches: hasDispatches,
   injection: injection,
-  useTouchEvents: false
+  useTouchEvents: true
 };
 
 module.exports = EventPluginUtils;