[Fiber] Use synchronous scheduling by default

scripts/fiber/tests-failing.txt

@@ -369,7 +369,6 @@ src/renderers/dom/stack/client/__tests__/ReactMount-test.js
 * should account for escaping on a checksum mismatch
 * should warn if render removes React-rendered children
 * should warn if the unmounted node was rendered by another copy of React
-* passes the correct callback context
 * tracks root instances
 * marks top-level mounts
 
@@ -608,8 +607,6 @@ src/renderers/shared/stack/reconciler/__tests__/ReactUpdates-test.js
 * throws in setState if the update callback is not a function
 * throws in replaceState if the update callback is not a function
 * throws in forceUpdate if the update callback is not a function
-* does not update one component twice in a batch (#2410)
-* unstable_batchedUpdates should return value from a callback
 
 src/renderers/shared/stack/reconciler/__tests__/refs-test.js
 * Should increase refs with an increase in divs

scripts/fiber/tests-passing.txt

@@ -692,6 +692,7 @@ src/renderers/dom/stack/client/__tests__/ReactMount-test.js
 * should warn if mounting into dirty rendered markup
 * should not warn if mounting into non-empty node
 * should warn when mounting into document.body
+* passes the correct callback context
 
 src/renderers/dom/stack/client/__tests__/ReactMountDestruction-test.js
 * should destroy a react root upon request
@@ -788,6 +789,8 @@ src/renderers/shared/fiber/__tests__/ReactIncremental-test.js
 * calls componentWill* twice if an update render is aborted
 * does not call componentWillReceiveProps for state-only updates
 * skips will/DidUpdate when bailing unless an update was already in progress
+* performs batched updates at the end of the batch
+* can nest batchedUpdates
 
 src/renderers/shared/fiber/__tests__/ReactIncrementalReflection-test.js
 * handles isMounted even when the initial render is deferred
@@ -833,6 +836,7 @@ src/renderers/shared/fiber/__tests__/ReactIncrementalSideEffects-test.js
 * can defer side-effects and reuse them later - complex
 * deprioritizes setStates that happens within a deprioritized tree
 * calls callback after update is flushed
+* calls setState callback even if component bails out
 * calls componentWillUnmount after a deletion, even if nested
 * calls componentDidMount/Update after insertion/update
 * invokes ref callbacks after insertion/update/unmount
@@ -1124,7 +1128,9 @@ src/renderers/shared/stack/reconciler/__tests__/ReactUpdates-test.js
 * should not reconcile children passed via props
 * should queue nested updates
 * calls componentWillReceiveProps setState callback properly
+* does not update one component twice in a batch (#2410)
 * does not update one component twice in a batch (#6371)
+* unstable_batchedUpdates should return value from a callback
 
 src/renderers/shared/stack/reconciler/__tests__/Transaction-test.js
 * should invoke closers with/only-with init returns

src/addons/transitions/__tests__/ReactTransitionGroup-test.js

@@ -97,10 +97,10 @@ describe('ReactTransitionGroup', () => {
       expect(log).toEqual(['didMount', 'willEnter', 'didEnter']);
 
       log = [];
-      instance.setState({count: 1}, function() {
-        expect(log).toEqual(['willLeave', 'didLeave', 'willUnmount']);
-      });
+      instance.setState({count: 1});
     });
+
+    expect(log).toEqual(['willLeave', 'didLeave', 'willUnmount']);
   });
 
   it('should handle enter/leave/enter/leave correctly', () => {

src/renderers/dom/fiber/ReactDOMFiber.js

@@ -112,6 +112,8 @@ var DOMRenderer = ReactFiberReconciler({
 
   scheduleDeferredCallback: window.requestIdleCallback,
 
+  useSyncScheduling: true,
+
 });
 
 var warned = false;
@@ -163,6 +165,10 @@ var ReactDOM = {
     return DOMRenderer.findHostInstance(component);
   },
 
+  unstable_batchedUpdates<A>(fn : () => A) : A {
+    return DOMRenderer.batchedUpdates(fn);
+  },
+
 };
 
 module.exports = ReactDOM;

src/renderers/noop/ReactNoop.js

@@ -257,6 +257,10 @@ var ReactNoop = {
     NoopRenderer.performWithPriority(AnimationPriority, fn);
   },
 
+  batchedUpdates: NoopRenderer.batchedUpdates,
+
+  syncUpdates: NoopRenderer.syncUpdates,
+
   // Logs the current state of the tree.
   dumpTree(rootID : string = DEFAULT_ROOT_ID) {
     const root = roots.get(rootID);

src/renderers/shared/fiber/ReactFiberBeginWork.js

@@ -15,7 +15,7 @@
 import type { ReactCoroutine } from 'ReactCoroutine';
 import type { Fiber } from 'ReactFiber';
 import type { HostConfig } from 'ReactFiberReconciler';
-import type { PriorityLevel } from 'ReactPriorityLevel';
+import type { PriorityLevel } from 'ReactPriorityLevel';		
 import ReactCurrentOwner from 'ReactCurrentOwner';
 
 var {
@@ -48,7 +48,7 @@ var ReactFiberClassComponent = require('ReactFiberClassComponent');
 
 module.exports = function<T, P, I, TI, C>(
   config : HostConfig<T, P, I, TI, C>,
-  scheduleUpdate : (fiber: Fiber, priorityLevel : PriorityLevel) => void
+  scheduleUpdate : (fiber: Fiber) => void
 ) {
 
   const {

src/renderers/shared/fiber/ReactFiberClassComponent.js

@@ -13,10 +13,8 @@
 'use strict';
 
 import type { Fiber } from 'ReactFiber';
-import type { PriorityLevel } from 'ReactPriorityLevel';
 import type { UpdateQueue } from 'ReactFiberUpdateQueue';
 
-var { LowPriority } = require('ReactPriorityLevel');
 var {
   createUpdateQueue,
   addToQueue,
@@ -27,16 +25,16 @@ var { isMounted } = require('ReactFiberTreeReflection');
 var ReactInstanceMap = require('ReactInstanceMap');
 var shallowEqual = require('shallowEqual');
 
-module.exports = function(scheduleUpdate : (fiber: Fiber, priorityLevel : PriorityLevel) => void) {
+module.exports = function(scheduleUpdate : (fiber: Fiber) => void) {
 
-  function scheduleUpdateQueue(fiber: Fiber, updateQueue: UpdateQueue, priorityLevel : PriorityLevel) {
+  function scheduleUpdateQueue(fiber: Fiber, updateQueue: UpdateQueue) {
     fiber.updateQueue = updateQueue;
     // Schedule update on the alternate as well, since we don't know which tree
     // is current.
     if (fiber.alternate) {
       fiber.alternate.updateQueue = updateQueue;
     }
-    scheduleUpdate(fiber, priorityLevel);
+    scheduleUpdate(fiber);
   }
 
   // Class component state updater
@@ -47,30 +45,27 @@ module.exports = function(scheduleUpdate : (fiber: Fiber, priorityLevel : Priori
       const updateQueue = fiber.updateQueue ?
         addToQueue(fiber.updateQueue, partialState) :
         createUpdateQueue(partialState);
-      scheduleUpdateQueue(fiber, updateQueue, LowPriority);
+      scheduleUpdateQueue(fiber, updateQueue);
     },
     enqueueReplaceState(instance, state) {
       const fiber = ReactInstanceMap.get(instance);
       const updateQueue = createUpdateQueue(state);
       updateQueue.isReplace = true;
-      scheduleUpdateQueue(fiber, updateQueue, LowPriority);
+      scheduleUpdateQueue(fiber, updateQueue);
     },
     enqueueForceUpdate(instance) {
       const fiber = ReactInstanceMap.get(instance);
       const updateQueue = fiber.updateQueue || createUpdateQueue(null);
       updateQueue.isForced = true;
-      scheduleUpdateQueue(fiber, updateQueue, LowPriority);
+      scheduleUpdateQueue(fiber, updateQueue);
     },
     enqueueCallback(instance, callback) {
       const fiber = ReactInstanceMap.get(instance);
       let updateQueue = fiber.updateQueue ?
         fiber.updateQueue :
         createUpdateQueue(null);
       addCallbackToQueue(updateQueue, callback);
-      fiber.updateQueue = updateQueue;
-      if (fiber.alternate) {
-        fiber.alternate.updateQueue = updateQueue;
-      }
+      scheduleUpdateQueue(fiber, updateQueue);
     },
   };
 
@@ -131,7 +126,7 @@ module.exports = function(scheduleUpdate : (fiber: Fiber, priorityLevel : Priori
       // process them now.
       const updateQueue = workInProgress.updateQueue;
       if (updateQueue) {
-        instance.state = mergeUpdateQueue(updateQueue, state, props);
+        instance.state = mergeUpdateQueue(updateQueue, instance, state, props);
       }
     }
   }
@@ -175,7 +170,7 @@ module.exports = function(scheduleUpdate : (fiber: Fiber, priorityLevel : Priori
       // process them now.
       const newUpdateQueue = workInProgress.updateQueue;
       if (newUpdateQueue) {
-        newInstance.state = mergeUpdateQueue(newUpdateQueue, newState, newProps);
+        newInstance.state = mergeUpdateQueue(newUpdateQueue, newInstance, newState, newProps);
       }
     }
     return true;
@@ -212,11 +207,21 @@ module.exports = function(scheduleUpdate : (fiber: Fiber, priorityLevel : Priori
     // TODO: Previous state can be null.
     let newState;
     if (updateQueue) {
-      newState = mergeUpdateQueue(updateQueue, previousState, newProps);
+      if (!updateQueue.hasUpdate) {
+        newState = previousState;
+      } else {
+        newState = mergeUpdateQueue(updateQueue, instance, previousState, newProps);
+      }
     } else {
       newState = previousState;
     }
 
+    if (oldProps === newProps &&
+        previousState === newState &&
+        updateQueue && !updateQueue.isForced) {
+      return false;
+    }
+
     if (!checkShouldComponentUpdate(
       workInProgress,
       oldProps,

src/renderers/shared/fiber/ReactFiberCommitWork.js

@@ -29,7 +29,8 @@ var { callCallbacks } = require('ReactFiberUpdateQueue');
 
 var {
   Placement,
-  PlacementAndUpdate,
+  Update,
+  Callback,
 } = require('ReactTypeOfSideEffect');
 
 module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
@@ -102,8 +103,7 @@ module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
         // If it is not host node and, we might have a host node inside it.
         // Try to search down until we find one.
         // TODO: For coroutines, this will have to search the stateNode.
-        if (node.effectTag === Placement ||
-          node.effectTag === PlacementAndUpdate) {
+        if (node.effectTag & Placement) {
           // If we don't have a child, try the siblings instead.
           continue siblings;
         }
@@ -114,8 +114,7 @@ module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
         }
       }
       // Check if this host node is stable or about to be placed.
-      if (node.effectTag !== Placement &&
-        node.effectTag !== PlacementAndUpdate) {
+      if (!(node.effectTag & Placement)) {
         // Found it!
         return node.stateNode;
       }
@@ -329,41 +328,41 @@ module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
       case ClassComponent: {
         const instance = finishedWork.stateNode;
         let error = null;
-        if (!current) {
-          if (typeof instance.componentDidMount === 'function') {
-            error = tryCallComponentDidMount(instance);
-          }
-        } else {
-          if (typeof instance.componentDidUpdate === 'function') {
-            const prevProps = current.memoizedProps;
-            const prevState = current.memoizedState;
-            error = tryCallComponentDidUpdate(instance, prevProps, prevState);
+        if (finishedWork.effectTag & Update) {
+          if (!current) {
+            if (typeof instance.componentDidMount === 'function') {
+              error = tryCallComponentDidMount(instance);
+            }
+          } else {
+            if (typeof instance.componentDidUpdate === 'function') {
+              const prevProps = current.memoizedProps;
+              const prevState = current.memoizedState;
+              error = tryCallComponentDidUpdate(instance, prevProps, prevState);
+            }
           }
+          attachRef(current, finishedWork, instance);
         }
-        // Clear updates from current fiber. This must go before the callbacks
-        // are reset, in case an update is triggered from inside a callback. Is
-        // this safe? Relies on the assumption that work is only committed if
-        // the update queue is empty.
+        // Clear updates from current fiber.
         if (finishedWork.alternate) {
           finishedWork.alternate.updateQueue = null;
         }
-        if (finishedWork.callbackList) {
-          const { callbackList } = finishedWork;
-          finishedWork.callbackList = null;
-          callCallbacks(callbackList, instance);
+        if (finishedWork.effectTag & Callback) {
+          if (finishedWork.callbackList) {
+            callCallbacks(finishedWork.callbackList, instance);
+            finishedWork.callbackList = null;
+          }
         }
-        attachRef(current, finishedWork, instance);
         if (error) {
           return trapError(finishedWork, error);
         }
         return null;
       }
       case HostContainer: {
-        const instance = finishedWork.stateNode;
-        if (instance.callbackList) {
-          const { callbackList } = instance;
-          instance.callbackList = null;
-          callCallbacks(callbackList, instance.current.child.stateNode);
+        const rootFiber = finishedWork.stateNode;
+        if (rootFiber.callbackList) {
+          const { callbackList } = rootFiber;
+          rootFiber.callbackList = null;
+          callCallbacks(callbackList, rootFiber.current.child.stateNode);
         }
       }
       case HostComponent: {

src/renderers/shared/fiber/ReactFiberCompleteWork.js

@@ -34,6 +34,7 @@ var {
 } = ReactTypeOfWork;
 var {
   Update,
+  Callback,
 } = ReactTypeOfSideEffect;
 
 module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
@@ -48,6 +49,11 @@ module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
     workInProgress.effectTag |= Update;
   }
 
+  function markCallback(workInProgress : Fiber) {
+    // Tag the fiber with a callback effect.
+    workInProgress.effectTag |= Callback;
+  }
+
   function transferOutput(child : ?Fiber, returnFiber : Fiber) {
     // If we have a single result, we just pass that through as the output to
     // avoid unnecessary traversal. When we have multiple output, we just pass
@@ -124,19 +130,24 @@ module.exports = function<T, P, I, TI, C>(config : HostConfig<T, P, I, TI, C>) {
         // Also need to transfer the props, because pendingProps will be null
         // in the case of an update
         const { state, props } = workInProgress.stateNode;
+        const updateQueue = workInProgress.updateQueue;
         workInProgress.memoizedState = state;
         workInProgress.memoizedProps = props;
-        // Transfer update queue to callbackList field so callbacks can be
-        // called during commit phase.
-        workInProgress.callbackList = workInProgress.updateQueue;
         if (current) {
           if (current.memoizedProps !== workInProgress.memoizedProps ||
-              current.memoizedState !== workInProgress.memoizedState) {
+              current.memoizedState !== workInProgress.memoizedState ||
+              updateQueue && updateQueue.isForced) {
             markUpdate(workInProgress);
           }
         } else {
           markUpdate(workInProgress);
         }
+        if (updateQueue && updateQueue.hasCallback) {
+          // Transfer update queue to callbackList field so callbacks can be
+          // called during commit phase.
+          workInProgress.callbackList = updateQueue;
+          markCallback(workInProgress);
+        }
         return null;
       case HostContainer:
         transferOutput(workInProgress.child, workInProgress);