Stopgap fix for element disabling (#8387)

Fix for #8308. This is a bad hack -- EventPluginHub.getListener isn't even DOM-specific -- but this works for now and lets us release 15.4.1.

scripts/fiber/tests-failing.txt

@@ -71,14 +71,19 @@ src/renderers/dom/shared/eventPlugins/__tests__/ChangeEventPlugin-test.js
 
 src/renderers/dom/shared/eventPlugins/__tests__/SimpleEventPlugin-test.js
 * A non-interactive tags clicks bubble when disabled
-* should not forward clicks when it starts out disabled
+* triggers parent captured click events when target is a child of a disabled elements
+* should forward clicks when it becomes not disabled
 * should not forward clicks when it becomes disabled
-* should not forward clicks when it starts out disabled
+* should work correctly if the listener is changed
+* should forward clicks when it becomes not disabled
 * should not forward clicks when it becomes disabled
-* should not forward clicks when it starts out disabled
+* should work correctly if the listener is changed
+* should forward clicks when it becomes not disabled
 * should not forward clicks when it becomes disabled
-* should not forward clicks when it starts out disabled
+* should work correctly if the listener is changed
+* should forward clicks when it becomes not disabled
 * should not forward clicks when it becomes disabled
+* should work correctly if the listener is changed
 
 src/renderers/dom/shared/wrappers/__tests__/ReactDOMInput-test.js
 * should control a value in reentrant events

scripts/fiber/tests-passing.txt

@@ -696,18 +696,17 @@ src/renderers/dom/shared/eventPlugins/__tests__/SelectEventPlugin-test.js
 
 src/renderers/dom/shared/eventPlugins/__tests__/SimpleEventPlugin-test.js
 * A non-interactive tags click when disabled
+* does not register a click when clicking a child of a disabled element
+* triggers click events for children of disabled elements
+* triggers captured click events for children of disabled elements
 * should forward clicks when it starts out not disabled
-* should forward clicks when it becomes not disabled
-* should work correctly if the listener is changed
+* should not forward clicks when it starts out disabled
 * should forward clicks when it starts out not disabled
-* should forward clicks when it becomes not disabled
-* should work correctly if the listener is changed
+* should not forward clicks when it starts out disabled
 * should forward clicks when it starts out not disabled
-* should forward clicks when it becomes not disabled
-* should work correctly if the listener is changed
+* should not forward clicks when it starts out disabled
 * should forward clicks when it starts out not disabled
-* should forward clicks when it becomes not disabled
-* should work correctly if the listener is changed
+* should not forward clicks when it starts out disabled
 * does not add a local click to interactive elements
 * adds a local click listener to non-interactive elements
 

src/renderers/dom/shared/eventPlugins/SimpleEventPlugin.js

@@ -138,25 +138,6 @@ var topLevelEventsToDispatchConfig: {[key: TopLevelTypes]: DispatchConfig} = {};
   topLevelEventsToDispatchConfig[topEvent] = type;
 });
 
-function isInteractive(tag) {
-  return (
-    tag === 'button' || tag === 'input' ||
-    tag === 'select' || tag === 'textarea'
-  );
-}
-
-function shouldPreventMouseEvent(inst) {
-  if (inst) {
-    var disabled = inst._currentElement && inst._currentElement.props.disabled;
-
-    if (disabled) {
-      return isInteractive(inst._tag);
-    }
-  }
-
-  return false;
-}
-
 var SimpleEventPlugin: PluginModule<MouseEvent> = {
 
   eventTypes: eventTypes,
@@ -232,10 +213,7 @@ var SimpleEventPlugin: PluginModule<MouseEvent> = {
       case 'topMouseDown':
       case 'topMouseMove':
       case 'topMouseUp':
-        // Disabled elements should not respond to mouse events
-        if (shouldPreventMouseEvent(targetInst)) {
-          return null;
-        }
+        // TODO: Disabled elements should not respond to mouse events
         /* falls through */
       case 'topMouseOut':
       case 'topMouseOver':

src/renderers/dom/shared/eventPlugins/__tests__/SimpleEventPlugin-test.js

@@ -17,16 +17,14 @@ describe('SimpleEventPlugin', function() {
   var ReactDOM;
   var ReactTestUtils;
 
-  var onClick = jest.fn();
+  var onClick;
 
   function expectClickThru(element) {
-    onClick.mockClear();
     ReactTestUtils.SimulateNative.click(ReactDOM.findDOMNode(element));
     expect(onClick.mock.calls.length).toBe(1);
   }
 
   function expectNoClickThru(element) {
-    onClick.mockClear();
     ReactTestUtils.SimulateNative.click(ReactDOM.findDOMNode(element));
     expect(onClick.mock.calls.length).toBe(0);
   }
@@ -40,6 +38,8 @@ describe('SimpleEventPlugin', function() {
     React = require('React');
     ReactDOM = require('ReactDOM');
     ReactTestUtils = require('ReactTestUtils');
+
+    onClick = jest.fn();
   });
 
   it('A non-interactive tags click when disabled', function() {
@@ -53,7 +53,48 @@ describe('SimpleEventPlugin', function() {
     );
     var child = ReactDOM.findDOMNode(element).firstChild;
 
-    onClick.mockClear();
+    ReactTestUtils.SimulateNative.click(child);
+    expect(onClick.mock.calls.length).toBe(1);
+  });
+
+  it('does not register a click when clicking a child of a disabled element', function() {
+    var element = ReactTestUtils.renderIntoDocument(
+      <button onClick={onClick} disabled={true}><span /></button>
+    );
+    var child = ReactDOM.findDOMNode(element).querySelector('span');
+
+    ReactTestUtils.SimulateNative.click(child);
+    expect(onClick.mock.calls.length).toBe(0);
+  });
+
+  it('triggers click events for children of disabled elements', function() {
+    var element = ReactTestUtils.renderIntoDocument(
+      <button disabled={true}><span onClick={onClick} /></button>
+    );
+    var child = ReactDOM.findDOMNode(element).querySelector('span');
+
+    ReactTestUtils.SimulateNative.click(child);
+    expect(onClick.mock.calls.length).toBe(1);
+  });
+
+  it('triggers parent captured click events when target is a child of a disabled elements', function() {
+    var element = ReactTestUtils.renderIntoDocument(
+      <div onClickCapture={onClick}>
+        <button disabled={true}><span /></button>
+      </div>
+    );
+    var child = ReactDOM.findDOMNode(element).querySelector('span');
+
+    ReactTestUtils.SimulateNative.click(child);
+    expect(onClick.mock.calls.length).toBe(1);
+  });
+
+  it('triggers captured click events for children of disabled elements', function() {
+    var element = ReactTestUtils.renderIntoDocument(
+      <button disabled={true}><span onClickCapture={onClick} /></button>
+    );
+    var child = ReactDOM.findDOMNode(element).querySelector('span');
+
     ReactTestUtils.SimulateNative.click(child);
     expect(onClick.mock.calls.length).toBe(1);
   });
@@ -124,10 +165,6 @@ describe('SimpleEventPlugin', function() {
   describe('iOS bubbling click fix', function() {
     // See http://www.quirksmode.org/blog/archives/2010/09/click_event_del.html
 
-    beforeEach(function() {
-      onClick.mockClear();
-    });
-
     it('does not add a local click to interactive elements', function() {
       var container = document.createElement('div');
 

src/renderers/shared/shared/event/EventPluginHub.js

@@ -48,6 +48,31 @@ var executeDispatchesAndReleaseTopLevel = function(e) {
   return executeDispatchesAndRelease(e, false);
 };
 
+function isInteractive(tag) {
+  return (
+    tag === 'button' || tag === 'input' ||
+    tag === 'select' || tag === 'textarea'
+  );
+}
+
+function shouldPreventMouseEvent(name, type, props) {
+  switch (name) {
+    case 'onClick':
+    case 'onClickCapture':
+    case 'onDoubleClick':
+    case 'onDoubleClickCapture':
+    case 'onMouseDown':
+    case 'onMouseDownCapture':
+    case 'onMouseMove':
+    case 'onMouseMoveCapture':
+    case 'onMouseUp':
+    case 'onMouseUpCapture':
+      return !!(props.disabled && isInteractive(type));
+    default:
+      return false;
+  }
+}
+
 /**
  * This is a unified interface for event plugins to be installed and configured.
  *
@@ -97,13 +122,25 @@ var EventPluginHub = {
    */
   getListener: function(inst, registrationName) {
     var listener;
+
+    // TODO: shouldPreventMouseEvent is DOM-specific and definitely should not
+    // live here; needs to be moved to a better place soon
     if (typeof inst.tag === 'number') {
       // TODO: This is not safe because we might want the *other* Fiber's
       // props depending on which is the current one.
-      listener = inst.memoizedProps[registrationName];
+      const props = inst.memoizedProps;
+      listener = props[registrationName];
+      if (shouldPreventMouseEvent(registrationName, inst.type, props)) {
+        return null;
+      }
     } else {
-      listener = inst._currentElement.props[registrationName];
+      const props = inst._currentElement.props;
+      listener = props[registrationName];
+      if (shouldPreventMouseEvent(registrationName, inst._currentElement.type, props)) {
+        return null;
+      }
     }
+
     invariant(
       !listener || typeof listener === 'function',
       'Expected %s listener to be a function, instead got type %s',