[WIP] Flow

.flowconfig

@@ -15,6 +15,9 @@
 <PROJECT_ROOT>/.*/__mocks__/.*
 <PROJECT_ROOT>/.*/__tests__/.*
 
+# TODO
+<PROJECT_ROOT>/packages/react-noop-renderer/.*
+
 [include]
 
 [libs]
@@ -29,6 +32,11 @@ esproposal.class_static_fields=enable
 esproposal.class_instance_fields=enable
 unsafe.enable_getters_and_setters=true
 
+# This would enable ReactDOM-specific check.
+# TODO: scripts that run this.
+# module.name_mapper='react-reconciler/inline.dom$' -> 'react-reconciler/inline.typed'
+# module.name_mapper='ReactFiberHostConfig' -> '<PROJECT_ROOT>/packages/react-dom/src/client/ReactDOMHostConfig'
+
 munge_underscores=false
 
 suppress_type=$FlowIssue

packages/react-art/src/ReactART.js

@@ -6,7 +6,7 @@
  */
 
 import React from 'react';
-import * as ARTRenderer from 'react-reconciler/inline';
+import * as ARTRenderer from 'react-reconciler/inline.art';
 import Transform from 'art/core/transform';
 import Mode from 'art/modes/current';
 import FastNoSideEffects from 'art/modes/fast-noSideEffects';

packages/react-dom/src/client/ReactDOM.js

@@ -19,7 +19,7 @@ import type {Container} from './ReactDOMHostConfig';
 import '../shared/checkReact';
 import './ReactDOMClientInjection';
 
-import * as DOMRenderer from 'react-reconciler/inline';
+import * as DOMRenderer from 'react-reconciler/inline.dom';
 import * as ReactPortal from 'shared/ReactPortal';
 import ExecutionEnvironment from 'fbjs/lib/ExecutionEnvironment';
 import * as ReactGenericBatching from 'events/ReactGenericBatching';

packages/react-dom/src/client/ReactDOMHostConfig.js

@@ -24,6 +24,19 @@ import {
   DOCUMENT_FRAGMENT_NODE,
 } from '../shared/HTMLNodeType';
 
+
+export type T = string;
+export type P = any;
+export type I = Element;
+export type TI = Text;
+export type HI = any;
+export type PI = Element | Text;
+export type C = Element | Document;
+export type CC = void;
+export type CX = string | { namespace: string, ancestorInfo: mixed };
+export type PL = Array<mixed>;
+
+
 export type Container = Element | Document;
 type Props = {
   autoFocus?: boolean,
@@ -111,6 +124,7 @@ export function getRootHostContext(rootContainerInstance: Container): HostContex
 export function getChildHostContext(
     parentHostContext: HostContext,
     type: string,
+    instance: *
   ): HostContext {
     if (__DEV__) {
       const parentHostContextDev = ((parentHostContext: any): HostContextDev);
@@ -130,13 +144,13 @@ export function  getPublicInstance(instance: Instance | TextInstance): * {
     return instance;
   }
 
-export function  prepareForCommit(): void {
+export function  prepareForCommit(containerInfo: *): void {
     eventsEnabled = ReactBrowserEventEmitter.isEnabled();
     selectionInformation = ReactInputSelection.getSelectionInformation();
     ReactBrowserEventEmitter.setEnabled(false);
   }
 
-export function resetAfterCommit(): void {
+export function resetAfterCommit(containerInfo: *): void {
     ReactInputSelection.restoreSelection(selectionInformation);
     selectionInformation = null;
     ReactBrowserEventEmitter.setEnabled(eventsEnabled);
@@ -194,6 +208,7 @@ export function finalizeInitialChildren(
     type: string,
     props: Props,
     rootContainerInstance: Container,
+    hostContext: *,
   ): boolean {
     setInitialProperties(domElement, type, props, rootContainerInstance);
     return shouldAutoFocusHostComponent(type, props);
@@ -566,23 +581,45 @@ export function prepareUpdate(
   export const cancelDeferredCallback = ReactScheduler.cancelScheduledWork;
 
 
-export function cloneInstance() {
+// TODO
+
+export function cloneInstance(
+    instance: Instance,
+    updatePayload: null | Array<mixed>,
+    type: string,
+    oldProps: Props,
+    newProps: Props,
+    internalInstanceHandle: Object,
+    keepChildren: boolean,
+    recyclableInstance: Instance,
+  ): Instance {
+  return instance;
   // not supported
 }
 
-export function createContainerChildSet() {
+export function createContainerChildSet(
+  container: Container
+): void {
   // not supported
 }
 
-export function appendChildToContainerChildSet() {
+export function appendChildToContainerChildSet(
+  childSet: void, child: Instance | TextInstance
+): void {
   // not supported
 }
 
-export function finalizeContainerChildren() {
+export function finalizeContainerChildren(
+  container: Container,
+  newChildren: void
+) {
   // not supported
 }
 
-export function replaceContainerChildren() {
+export function replaceContainerChildren(
+  container: Container,
+  newChildren: void
+) {
   // not supported
 }
 

packages/react-native-renderer/src/ReactFabric.js

@@ -12,7 +12,7 @@ import type {ReactNodeList} from 'shared/ReactTypes';
 
 import './ReactFabricInjection';
 
-import * as ReactFabricRenderer from 'react-reconciler/inline';
+import * as ReactFabricRenderer from 'react-reconciler/inline.fabric';
 
 import * as ReactPortal from 'shared/ReactPortal';
 import * as ReactGenericBatching from 'events/ReactGenericBatching';

packages/react-native-renderer/src/ReactNativeRenderer.js

@@ -12,7 +12,7 @@ import type {ReactNodeList} from 'shared/ReactTypes';
 
 import './ReactNativeInjection';
 
-import * as ReactNativeFiberRenderer from 'react-reconciler/inline';
+import * as ReactNativeFiberRenderer from 'react-reconciler/inline.native';
 import * as ReactPortal from 'shared/ReactPortal';
 import * as ReactGenericBatching from 'events/ReactGenericBatching';
 import ReactVersion from 'shared/ReactVersion';

packages/react-noop-renderer/src/createReactNoop.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @ TODO !!!!!!!!!!!!!!!!!!
  */
 
 /**

packages/react-reconciler/index.js

@@ -4,7 +4,7 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
+ * @ TODO !!!!!!!!!!!!!!!!!!
  */
 
 'use strict';

packages/react-reconciler/inline.art.js

@@ -0,0 +1,2 @@
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/inline.dom.js

@@ -0,0 +1,2 @@
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/inline.fabric.js

@@ -0,0 +1,2 @@
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/inline.native.js

@@ -0,0 +1,2 @@
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/inline.test.js

@@ -0,0 +1,2 @@
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/inline.typed.js

@@ -0,0 +1,4 @@
+// @flow
+
+// TODO
+export * from './src/ReactFiberReconciler';

packages/react-reconciler/src/ReactFiberBeginWork.js

@@ -7,16 +7,10 @@
  * @flow
  */
 
-import type {HostConfig} from 'react-reconciler';
 import type {ReactProviderType, ReactContext} from 'shared/ReactTypes';
 import type {Fiber} from 'react-reconciler/src/ReactFiber';
-import type {HostContext} from './ReactFiberHostContext';
-import type {LegacyContext} from './ReactFiberContext';
-import type {NewContext} from './ReactFiberNewContext';
-import type {HydrationContext} from './ReactFiberHydrationContext';
 import type {FiberRoot} from './ReactFiberRoot';
 import type {ExpirationTime} from './ReactFiberExpirationTime';
-import type {ProfilerTimer} from './ReactProfilerTimer';
 import checkPropTypes from 'prop-types/checkPropTypes';
 
 import {

packages/react-reconciler/src/ReactFiberClassComponent.js

@@ -9,7 +9,6 @@
 
 import type {Fiber} from './ReactFiber';
 import type {ExpirationTime} from './ReactFiberExpirationTime';
-import type {LegacyContext} from './ReactFiberContext';
 
 import {Update, Snapshot} from 'shared/ReactTypeOfSideEffect';
 import {

packages/react-reconciler/src/ReactFiberCommitWork.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {HostConfig} from 'react-reconciler';
+import type {I, TI, C, CC, PL} from './ReactFiberHostConfig';
 import type {Fiber} from './ReactFiber';
 import type {FiberRoot} from './ReactFiberRoot';
 import type {ExpirationTime} from './ReactFiberExpirationTime';

packages/react-reconciler/src/ReactFiberCompleteWork.js

@@ -7,15 +7,10 @@
  * @flow
  */
 
-import type {HostConfig} from 'react-reconciler';
 import type {Fiber} from './ReactFiber';
 import type {ExpirationTime} from './ReactFiberExpirationTime';
-import type {HostContext} from './ReactFiberHostContext';
-import type {LegacyContext} from './ReactFiberContext';
-import type {NewContext} from './ReactFiberNewContext';
-import type {HydrationContext} from './ReactFiberHydrationContext';
 import type {FiberRoot} from './ReactFiberRoot';
-import type {ProfilerTimer} from './ReactProfilerTimer';
+import type {T, P, I, TI, HI, PI, C, CC, CX, PL} from './ReactFiberHostConfig';
 
 import {
   enableMutatingReconciler,

packages/react-reconciler/src/ReactFiberContext.js

@@ -8,7 +8,7 @@
  */
 
 import type {Fiber} from './ReactFiber';
-import type {StackCursor, Stack} from './ReactFiberStack';
+import type {StackCursor} from './ReactFiberStack';
 
 import {isFiberMounted} from 'react-reconciler/reflection';
 import {ClassComponent, HostRoot} from 'shared/ReactTypeOfWork';
@@ -28,30 +28,6 @@ if (__DEV__) {
   warnedAboutMissingGetChildContext = {};
 }
 
-export type LegacyContext = {
-  getUnmaskedContext(workInProgress: Fiber): Object,
-  cacheContext(
-    workInProgress: Fiber,
-    unmaskedContext: Object,
-    maskedContext: Object,
-  ): void,
-  getMaskedContext(workInProgress: Fiber, unmaskedContext: Object): Object,
-  hasContextChanged(): boolean,
-  isContextConsumer(fiber: Fiber): boolean,
-  isContextProvider(fiber: Fiber): boolean,
-  popContextProvider(fiber: Fiber): void,
-  popTopLevelContextObject(fiber: Fiber): void,
-  pushTopLevelContextObject(
-    fiber: Fiber,
-    context: Object,
-    didChange: boolean,
-  ): void,
-  processChildContext(fiber: Fiber, parentContext: Object): Object,
-  pushContextProvider(workInProgress: Fiber): boolean,
-  invalidateContextProvider(workInProgress: Fiber, didChange: boolean): void,
-  findCurrentUnmaskedContext(fiber: Fiber): Object,
-};
-
   // A cursor to the current merged context object on the stack.
   let contextStackCursor: StackCursor<Object> = createCursor(emptyObject);
   // A cursor to a boolean indicating whether the context has changed.
@@ -77,13 +53,13 @@ export type LegacyContext = {
     workInProgress: Fiber,
     unmaskedContext: Object,
     maskedContext: Object,
-  ) {
+  ): void {
     const instance = workInProgress.stateNode;
     instance.__reactInternalMemoizedUnmaskedChildContext = unmaskedContext;
     instance.__reactInternalMemoizedMaskedChildContext = maskedContext;
   }
 
-  function getMaskedContext(workInProgress: Fiber, unmaskedContext: Object) {
+  function getMaskedContext(workInProgress: Fiber, unmaskedContext: Object): Object {
     const type = workInProgress.type;
     const contextTypes = type.contextTypes;
     if (!contextTypes) {
@@ -147,7 +123,7 @@ export type LegacyContext = {
     pop(contextStackCursor, fiber);
   }
 
-  function popTopLevelContextObject(fiber: Fiber) {
+  function popTopLevelContextObject(fiber: Fiber): void {
     pop(didPerformWorkStackCursor, fiber);
     pop(contextStackCursor, fiber);
   }