Simulate input event instead of relying on native

Test Plan:
With the ballmer-peak example (modified to use input), tested that the
percentage updates when adding or deleting text in the field on Chrome
and IE9. After adding es5-shim and es5-sham to the ballmer-peak page,
IE8 works properly too.

src/core/ReactDefaultInjection.js

@@ -24,6 +24,7 @@ var ReactDOMForm = require('ReactDOMForm');
 var DefaultEventPluginOrder = require('DefaultEventPluginOrder');
 var EnterLeaveEventPlugin = require('EnterLeaveEventPlugin');
 var EventPluginHub = require('EventPluginHub');
+var InputEventPlugin = require('InputEventPlugin');
 var ReactInstanceHandles = require('ReactInstanceHandles');
 var SimpleEventPlugin = require('SimpleEventPlugin');
 
@@ -40,7 +41,8 @@ function inject() {
    */
   EventPluginHub.injection.injectEventPluginsByName({
     'SimpleEventPlugin': SimpleEventPlugin,
-    'EnterLeaveEventPlugin': EnterLeaveEventPlugin
+    'EnterLeaveEventPlugin': EnterLeaveEventPlugin,
+    'InputEventPlugin': InputEventPlugin
   });
 
   /*

src/core/ReactEvent.js

@@ -211,8 +211,10 @@ function listenAtTopLevel(touchNotMouse) {
   trapBubbledEvent(topLevelTypes.topKeyUp, 'keyup', mountAt);
   trapBubbledEvent(topLevelTypes.topKeyPress, 'keypress', mountAt);
   trapBubbledEvent(topLevelTypes.topKeyDown, 'keydown', mountAt);
-  trapBubbledEvent(topLevelTypes.topInput, 'input', mountAt);
   trapBubbledEvent(topLevelTypes.topChange, 'change', mountAt);
+  trapBubbledEvent(topLevelTypes.topInput, 'input', mountAt);
+  trapBubbledEvent(topLevelTypes.topCut, 'cut', mountAt);
+  trapBubbledEvent(topLevelTypes.topPaste, 'paste', mountAt);
   trapBubbledEvent(
     topLevelTypes.topDOMCharacterDataModified,
     'DOMCharacterDataModified',

src/event/EventConstants.js

@@ -29,6 +29,7 @@ var topLevelTypes = keyMirror({
   topBlur: null,
   topChange: null,
   topClick: null,
+  topCut: null,
   topDOMCharacterDataModified: null,
   topDoubleClick: null,
   topFocus: null,
@@ -42,6 +43,7 @@ var topLevelTypes = keyMirror({
   topMouseOver: null,
   topMouseUp: null,
   topMouseWheel: null,
+  topPaste: null,
   topScroll: null,
   topSubmit: null,
   topTouchCancel: null,

src/eventPlugins/DefaultEventPluginOrder.js

@@ -34,6 +34,7 @@ var DefaultEventPluginOrder = [
   keyOf({SimpleEventPlugin: null}),
   keyOf({TapEventPlugin: null}),
   keyOf({EnterLeaveEventPlugin: null}),
+  keyOf({InputEventPlugin: null}),
   keyOf({AnalyticsEventPlugin: null})
 ];
 

src/eventPlugins/InputEventPlugin.js

@@ -0,0 +1,99 @@
+/**
+ * Copyright 2013 Facebook, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @providesModule InputEventPlugin
+ */
+
+"use strict";
+
+var AbstractEvent = require('AbstractEvent');
+var EventConstants = require('EventConstants');
+var EventPluginUtils = require('EventPluginUtils');
+var EventPropagators = require('EventPropagators');
+
+var keyOf = require('keyOf');
+
+var topLevelTypes = EventConstants.topLevelTypes;
+
+var abstractEventTypes = {
+  input: {
+    phasedRegistrationNames: {
+      bubbled: keyOf({onInput: null}),
+      captured: keyOf({onInputCapture: null})
+    }
+  }
+};
+
+/**
+ * @see EventPluginHub.extractAbstractEvents
+ */
+var extractAbstractEvents = function(
+    topLevelType,
+    nativeEvent,
+    renderedTargetID,
+    renderedTarget) {
+
+  var defer, key;
+  switch (topLevelType) {
+    case topLevelTypes.topInput:
+      // When the native input event is triggered, we definitely want to
+      // forward it along. However, IE9's input event doesn't get triggered
+      // when deleting text, and IE8 doesn't support input at all, so we
+      // simulate it on change, cut, paste, and keydown.
+    case topLevelTypes.topChange:
+      defer = false;
+      break;
+    case topLevelTypes.topCut:
+    case topLevelTypes.topPaste:
+      defer = true;
+      break;
+    case topLevelTypes.topKeyDown:
+      key = nativeEvent.keyCode;
+      // Ignore command, modifiers, and arrow keys, respectively
+      if (key === 91 || (15 < key && key < 19) || (37 <= key && key <= 40)) {
+        return;
+      }
+      defer = true;
+      break;
+    default:
+      return;
+  }
+
+  var type = abstractEventTypes.input;
+  var abstractTargetID = renderedTargetID;
+  var abstractEvent = AbstractEvent.getPooled(
+    type,
+    abstractTargetID,
+    topLevelType,
+    nativeEvent
+  );
+  EventPropagators.accumulateTwoPhaseDispatches(abstractEvent);
+
+  if (defer) {
+    setTimeout(function() {
+      EventPluginHub.enqueueAbstractEvents(abstractEvent);
+      EventPluginHub.processAbstractEventQueue();
+    }, 0);
+  } else {
+    return abstractEvent;
+  }
+};
+
+var InputEventPlugin = {
+  abstractEventTypes: abstractEventTypes,
+  extractAbstractEvents: extractAbstractEvents
+};
+
+module.exports = InputEventPlugin;

src/eventPlugins/SimpleEventPlugin.js

@@ -108,12 +108,6 @@ var SimpleEventPlugin = {
         captured: keyOf({onKeyDownCapture: true})
       }
     },
-    input: {
-      phasedRegistrationNames: {
-        bubbled: keyOf({onInput: true}),
-        captured: keyOf({onInputCapture: true})
-      }
-    },
     focus: {
       phasedRegistrationNames: {
         bubbled: keyOf({onFocus: true}),
@@ -226,7 +220,6 @@ SimpleEventPlugin.topLevelTypesToAbstract = {
   topKeyUp:       SimpleEventPlugin.abstractEventTypes.keyUp,
   topKeyPress:    SimpleEventPlugin.abstractEventTypes.keyPress,
   topKeyDown:     SimpleEventPlugin.abstractEventTypes.keyDown,
-  topInput:       SimpleEventPlugin.abstractEventTypes.input,
   topFocus:       SimpleEventPlugin.abstractEventTypes.focus,
   topBlur:        SimpleEventPlugin.abstractEventTypes.blur,
   topScroll:      SimpleEventPlugin.abstractEventTypes.scroll,