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[Fizz] Implement Classes #21200
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,673 @@ | ||
| /** | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| * | ||
| * @flow | ||
| */ | ||
|
|
||
| import {emptyContextObject} from './ReactFizzContext'; | ||
|
|
||
| import {disableLegacyContext} from 'shared/ReactFeatureFlags'; | ||
| import {get as getInstance, set as setInstance} from 'shared/ReactInstanceMap'; | ||
| import getComponentNameFromType from 'shared/getComponentNameFromType'; | ||
| import {REACT_CONTEXT_TYPE, REACT_PROVIDER_TYPE} from 'shared/ReactSymbols'; | ||
| import isArray from 'shared/isArray'; | ||
|
|
||
| const didWarnAboutNoopUpdateForComponent = {}; | ||
|
|
||
| let didWarnAboutUninitializedState; | ||
| let didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate; | ||
| let didWarnAboutLegacyLifecyclesAndDerivedState; | ||
| let didWarnAboutUndefinedDerivedState; | ||
| let warnOnUndefinedDerivedState; | ||
| let warnOnInvalidCallback; | ||
| let didWarnAboutDirectlyAssigningPropsToState; | ||
| let didWarnAboutContextTypeAndContextTypes; | ||
| let didWarnAboutInvalidateContextType; | ||
|
|
||
| if (__DEV__) { | ||
| didWarnAboutUninitializedState = new Set(); | ||
| didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate = new Set(); | ||
| didWarnAboutLegacyLifecyclesAndDerivedState = new Set(); | ||
| didWarnAboutDirectlyAssigningPropsToState = new Set(); | ||
| didWarnAboutUndefinedDerivedState = new Set(); | ||
| didWarnAboutContextTypeAndContextTypes = new Set(); | ||
| didWarnAboutInvalidateContextType = new Set(); | ||
|
|
||
| const didWarnOnInvalidCallback = new Set(); | ||
|
|
||
| warnOnInvalidCallback = function(callback: mixed, callerName: string) { | ||
| if (callback === null || typeof callback === 'function') { | ||
| return; | ||
| } | ||
| const key = callerName + '_' + (callback: any); | ||
| if (!didWarnOnInvalidCallback.has(key)) { | ||
| didWarnOnInvalidCallback.add(key); | ||
| console.error( | ||
| '%s(...): Expected the last optional `callback` argument to be a ' + | ||
| 'function. Instead received: %s.', | ||
| callerName, | ||
| callback, | ||
| ); | ||
| } | ||
| }; | ||
|
|
||
| warnOnUndefinedDerivedState = function(type, partialState) { | ||
| if (partialState === undefined) { | ||
| const componentName = getComponentNameFromType(type) || 'Component'; | ||
| if (!didWarnAboutUndefinedDerivedState.has(componentName)) { | ||
| didWarnAboutUndefinedDerivedState.add(componentName); | ||
| console.error( | ||
| '%s.getDerivedStateFromProps(): A valid state object (or null) must be returned. ' + | ||
| 'You have returned undefined.', | ||
| componentName, | ||
| ); | ||
| } | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| function warnNoop( | ||
| publicInstance: React$Component<any, any>, | ||
| callerName: string, | ||
| ) { | ||
| if (__DEV__) { | ||
| const constructor = publicInstance.constructor; | ||
| const componentName = | ||
| (constructor && getComponentNameFromType(constructor)) || 'ReactClass'; | ||
| const warningKey = componentName + '.' + callerName; | ||
| if (didWarnAboutNoopUpdateForComponent[warningKey]) { | ||
| return; | ||
| } | ||
|
|
||
| console.error( | ||
| '%s(...): Can only update a mounting component. ' + | ||
| 'This usually means you called %s() outside componentWillMount() on the server. ' + | ||
| 'This is a no-op.\n\nPlease check the code for the %s component.', | ||
| callerName, | ||
| callerName, | ||
| componentName, | ||
| ); | ||
| didWarnAboutNoopUpdateForComponent[warningKey] = true; | ||
| } | ||
| } | ||
|
|
||
| type InternalInstance = { | ||
| queue: null | Array<Object>, | ||
| replace: boolean, | ||
| }; | ||
|
|
||
| const classComponentUpdater = { | ||
| isMounted(inst) { | ||
| return false; | ||
| }, | ||
| enqueueSetState(inst, payload, callback) { | ||
| const internals: InternalInstance = getInstance(inst); | ||
| if (internals.queue === null) { | ||
| warnNoop(inst, 'setState'); | ||
| } else { | ||
| internals.queue.push(payload); | ||
| if (__DEV__) { | ||
| if (callback !== undefined && callback !== null) { | ||
| warnOnInvalidCallback(callback, 'setState'); | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| enqueueReplaceState(inst, payload, callback) { | ||
| const internals: InternalInstance = getInstance(inst); | ||
| internals.replace = true; | ||
| internals.queue = [payload]; | ||
| if (__DEV__) { | ||
| if (callback !== undefined && callback !== null) { | ||
| warnOnInvalidCallback(callback, 'setState'); | ||
| } | ||
| } | ||
| }, | ||
| enqueueForceUpdate(inst, callback) { | ||
| const internals: InternalInstance = getInstance(inst); | ||
| if (internals.queue === null) { | ||
| warnNoop(inst, 'forceUpdate'); | ||
| } else { | ||
| if (__DEV__) { | ||
| if (callback !== undefined && callback !== null) { | ||
| warnOnInvalidCallback(callback, 'setState'); | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| }; | ||
|
|
||
| function applyDerivedStateFromProps( | ||
| instance: any, | ||
| ctor: any, | ||
| getDerivedStateFromProps: (props: any, state: any) => any, | ||
| prevState: any, | ||
| nextProps: any, | ||
| ) { | ||
| const partialState = getDerivedStateFromProps(nextProps, prevState); | ||
|
|
||
| if (__DEV__) { | ||
| warnOnUndefinedDerivedState(ctor, partialState); | ||
| } | ||
| // Merge the partial state and the previous state. | ||
| const newState = | ||
| partialState === null || partialState === undefined | ||
| ? prevState | ||
| : Object.assign({}, prevState, partialState); | ||
| return newState; | ||
| } | ||
|
|
||
| export function constructClassInstance( | ||
| ctor: any, | ||
| props: any, | ||
| maskedLegacyContext: any, | ||
| ): any { | ||
| let context = emptyContextObject; | ||
| const contextType = ctor.contextType; | ||
|
|
||
| if (__DEV__) { | ||
| if ('contextType' in ctor) { | ||
| const isValid = | ||
| // Allow null for conditional declaration | ||
| contextType === null || | ||
| (contextType !== undefined && | ||
| contextType.$$typeof === REACT_CONTEXT_TYPE && | ||
| contextType._context === undefined); // Not a <Context.Consumer> | ||
|
|
||
| if (!isValid && !didWarnAboutInvalidateContextType.has(ctor)) { | ||
| didWarnAboutInvalidateContextType.add(ctor); | ||
|
|
||
| let addendum = ''; | ||
| if (contextType === undefined) { | ||
| addendum = | ||
| ' However, it is set to undefined. ' + | ||
| 'This can be caused by a typo or by mixing up named and default imports. ' + | ||
| 'This can also happen due to a circular dependency, so ' + | ||
| 'try moving the createContext() call to a separate file.'; | ||
| } else if (typeof contextType !== 'object') { | ||
| addendum = ' However, it is set to a ' + typeof contextType + '.'; | ||
| } else if (contextType.$$typeof === REACT_PROVIDER_TYPE) { | ||
| addendum = ' Did you accidentally pass the Context.Provider instead?'; | ||
| } else if (contextType._context !== undefined) { | ||
| // <Context.Consumer> | ||
| addendum = ' Did you accidentally pass the Context.Consumer instead?'; | ||
| } else { | ||
| addendum = | ||
| ' However, it is set to an object with keys {' + | ||
| Object.keys(contextType).join(', ') + | ||
| '}.'; | ||
| } | ||
| console.error( | ||
| '%s defines an invalid contextType. ' + | ||
| 'contextType should point to the Context object returned by React.createContext().%s', | ||
| getComponentNameFromType(ctor) || 'Component', | ||
| addendum, | ||
| ); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (typeof contextType === 'object' && contextType !== null) { | ||
| // TODO: Implement Context. | ||
| // context = readContext((contextType: any)); | ||
| throw new Error('Context is not yet implemented.'); | ||
| } else if (!disableLegacyContext) { | ||
| context = maskedLegacyContext; | ||
| } | ||
|
|
||
| const instance = new ctor(props, context); | ||
|
|
||
| if (__DEV__) { | ||
| if ( | ||
| typeof ctor.getDerivedStateFromProps === 'function' && | ||
| (instance.state === null || instance.state === undefined) | ||
| ) { | ||
| const componentName = getComponentNameFromType(ctor) || 'Component'; | ||
| if (!didWarnAboutUninitializedState.has(componentName)) { | ||
| didWarnAboutUninitializedState.add(componentName); | ||
| console.error( | ||
| '`%s` uses `getDerivedStateFromProps` but its initial state is ' + | ||
| '%s. This is not recommended. Instead, define the initial state by ' + | ||
| 'assigning an object to `this.state` in the constructor of `%s`. ' + | ||
| 'This ensures that `getDerivedStateFromProps` arguments have a consistent shape.', | ||
| componentName, | ||
| instance.state === null ? 'null' : 'undefined', | ||
| componentName, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| // If new component APIs are defined, "unsafe" lifecycles won't be called. | ||
| // Warn about these lifecycles if they are present. | ||
| // Don't warn about react-lifecycles-compat polyfilled methods though. | ||
| if ( | ||
| typeof ctor.getDerivedStateFromProps === 'function' || | ||
| typeof instance.getSnapshotBeforeUpdate === 'function' | ||
| ) { | ||
| let foundWillMountName = null; | ||
| let foundWillReceivePropsName = null; | ||
| let foundWillUpdateName = null; | ||
| if ( | ||
| typeof instance.componentWillMount === 'function' && | ||
| instance.componentWillMount.__suppressDeprecationWarning !== true | ||
| ) { | ||
| foundWillMountName = 'componentWillMount'; | ||
| } else if (typeof instance.UNSAFE_componentWillMount === 'function') { | ||
| foundWillMountName = 'UNSAFE_componentWillMount'; | ||
| } | ||
| if ( | ||
| typeof instance.componentWillReceiveProps === 'function' && | ||
| instance.componentWillReceiveProps.__suppressDeprecationWarning !== true | ||
| ) { | ||
| foundWillReceivePropsName = 'componentWillReceiveProps'; | ||
| } else if ( | ||
| typeof instance.UNSAFE_componentWillReceiveProps === 'function' | ||
| ) { | ||
| foundWillReceivePropsName = 'UNSAFE_componentWillReceiveProps'; | ||
| } | ||
| if ( | ||
| typeof instance.componentWillUpdate === 'function' && | ||
| instance.componentWillUpdate.__suppressDeprecationWarning !== true | ||
| ) { | ||
| foundWillUpdateName = 'componentWillUpdate'; | ||
| } else if (typeof instance.UNSAFE_componentWillUpdate === 'function') { | ||
| foundWillUpdateName = 'UNSAFE_componentWillUpdate'; | ||
| } | ||
| if ( | ||
| foundWillMountName !== null || | ||
| foundWillReceivePropsName !== null || | ||
| foundWillUpdateName !== null | ||
| ) { | ||
| const componentName = getComponentNameFromType(ctor) || 'Component'; | ||
| const newApiName = | ||
| typeof ctor.getDerivedStateFromProps === 'function' | ||
| ? 'getDerivedStateFromProps()' | ||
| : 'getSnapshotBeforeUpdate()'; | ||
| if (!didWarnAboutLegacyLifecyclesAndDerivedState.has(componentName)) { | ||
| didWarnAboutLegacyLifecyclesAndDerivedState.add(componentName); | ||
| console.error( | ||
| 'Unsafe legacy lifecycles will not be called for components using new component APIs.\n\n' + | ||
| '%s uses %s but also contains the following legacy lifecycles:%s%s%s\n\n' + | ||
| 'The above lifecycles should be removed. Learn more about this warning here:\n' + | ||
| 'https://reactjs.org/link/unsafe-component-lifecycles', | ||
| componentName, | ||
| newApiName, | ||
| foundWillMountName !== null ? `\n ${foundWillMountName}` : '', | ||
| foundWillReceivePropsName !== null | ||
| ? `\n ${foundWillReceivePropsName}` | ||
| : '', | ||
| foundWillUpdateName !== null ? `\n ${foundWillUpdateName}` : '', | ||
| ); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return instance; | ||
| } | ||
|
|
||
| function checkClassInstance(instance: any, ctor: any, newProps: any) { | ||
| if (__DEV__) { | ||
| const name = getComponentNameFromType(ctor) || 'Component'; | ||
| const renderPresent = instance.render; | ||
|
|
||
| if (!renderPresent) { | ||
| if (ctor.prototype && typeof ctor.prototype.render === 'function') { | ||
| console.error( | ||
| '%s(...): No `render` method found on the returned component ' + | ||
| 'instance: did you accidentally return an object from the constructor?', | ||
| name, | ||
| ); | ||
| } else { | ||
| console.error( | ||
| '%s(...): No `render` method found on the returned component ' + | ||
| 'instance: you may have forgotten to define `render`.', | ||
| name, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| if ( | ||
| instance.getInitialState && | ||
| !instance.getInitialState.isReactClassApproved && | ||
| !instance.state | ||
| ) { | ||
| console.error( | ||
| 'getInitialState was defined on %s, a plain JavaScript class. ' + | ||
| 'This is only supported for classes created using React.createClass. ' + | ||
| 'Did you mean to define a state property instead?', | ||
| name, | ||
| ); | ||
| } | ||
| if ( | ||
| instance.getDefaultProps && | ||
| !instance.getDefaultProps.isReactClassApproved | ||
| ) { | ||
| console.error( | ||
| 'getDefaultProps was defined on %s, a plain JavaScript class. ' + | ||
| 'This is only supported for classes created using React.createClass. ' + | ||
| 'Use a static property to define defaultProps instead.', | ||
| name, | ||
| ); | ||
| } | ||
| if (instance.propTypes) { | ||
| console.error( | ||
| 'propTypes was defined as an instance property on %s. Use a static ' + | ||
| 'property to define propTypes instead.', | ||
| name, | ||
| ); | ||
| } | ||
| if (instance.contextType) { | ||
| console.error( | ||
| 'contextType was defined as an instance property on %s. Use a static ' + | ||
| 'property to define contextType instead.', | ||
| name, | ||
| ); | ||
| } | ||
|
|
||
| if (disableLegacyContext) { | ||
| if (ctor.childContextTypes) { | ||
| console.error( | ||
| '%s uses the legacy childContextTypes API which is no longer supported. ' + | ||
| 'Use React.createContext() instead.', | ||
| name, | ||
| ); | ||
| } | ||
| if (ctor.contextTypes) { | ||
| console.error( | ||
| '%s uses the legacy contextTypes API which is no longer supported. ' + | ||
| 'Use React.createContext() with static contextType instead.', | ||
| name, | ||
| ); | ||
| } | ||
| } else { | ||
| if (instance.contextTypes) { | ||
| console.error( | ||
| 'contextTypes was defined as an instance property on %s. Use a static ' + | ||
| 'property to define contextTypes instead.', | ||
| name, | ||
| ); | ||
| } | ||
|
|
||
| if ( | ||
| ctor.contextType && | ||
| ctor.contextTypes && | ||
| !didWarnAboutContextTypeAndContextTypes.has(ctor) | ||
| ) { | ||
| didWarnAboutContextTypeAndContextTypes.add(ctor); | ||
| console.error( | ||
| '%s declares both contextTypes and contextType static properties. ' + | ||
| 'The legacy contextTypes property will be ignored.', | ||
| name, | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| if (typeof instance.componentShouldUpdate === 'function') { | ||
| console.error( | ||
| '%s has a method called ' + | ||
| 'componentShouldUpdate(). Did you mean shouldComponentUpdate()? ' + | ||
| 'The name is phrased as a question because the function is ' + | ||
| 'expected to return a value.', | ||
| name, | ||
| ); | ||
| } | ||
| if ( | ||
| ctor.prototype && | ||
| ctor.prototype.isPureReactComponent && | ||
| typeof instance.shouldComponentUpdate !== 'undefined' | ||
| ) { | ||
| console.error( | ||
| '%s has a method called shouldComponentUpdate(). ' + | ||
| 'shouldComponentUpdate should not be used when extending React.PureComponent. ' + | ||
| 'Please extend React.Component if shouldComponentUpdate is used.', | ||
| getComponentNameFromType(ctor) || 'A pure component', | ||
| ); | ||
| } | ||
| if (typeof instance.componentDidUnmount === 'function') { | ||
| console.error( | ||
| '%s has a method called ' + | ||
| 'componentDidUnmount(). But there is no such lifecycle method. ' + | ||
| 'Did you mean componentWillUnmount()?', | ||
| name, | ||
| ); | ||
| } | ||
| if (typeof instance.componentDidReceiveProps === 'function') { | ||
| console.error( | ||
| '%s has a method called ' + | ||
| 'componentDidReceiveProps(). But there is no such lifecycle method. ' + | ||
| 'If you meant to update the state in response to changing props, ' + | ||
| 'use componentWillReceiveProps(). If you meant to fetch data or ' + | ||
| 'run side-effects or mutations after React has updated the UI, use componentDidUpdate().', | ||
| name, | ||
| ); | ||
| } | ||
| if (typeof instance.componentWillRecieveProps === 'function') { | ||
| console.error( | ||
| '%s has a method called ' + | ||
| 'componentWillRecieveProps(). Did you mean componentWillReceiveProps()?', | ||
| name, | ||
| ); | ||
| } | ||
| if (typeof instance.UNSAFE_componentWillRecieveProps === 'function') { | ||
| console.error( | ||
| '%s has a method called ' + | ||
| 'UNSAFE_componentWillRecieveProps(). Did you mean UNSAFE_componentWillReceiveProps()?', | ||
| name, | ||
| ); | ||
| } | ||
| const hasMutatedProps = instance.props !== newProps; | ||
| if (instance.props !== undefined && hasMutatedProps) { | ||
| console.error( | ||
| '%s(...): When calling super() in `%s`, make sure to pass ' + | ||
| "up the same props that your component's constructor was passed.", | ||
| name, | ||
| name, | ||
| ); | ||
| } | ||
| if (instance.defaultProps) { | ||
| console.error( | ||
| 'Setting defaultProps as an instance property on %s is not supported and will be ignored.' + | ||
| ' Instead, define defaultProps as a static property on %s.', | ||
| name, | ||
| name, | ||
| ); | ||
| } | ||
|
|
||
| if ( | ||
| typeof instance.getSnapshotBeforeUpdate === 'function' && | ||
| typeof instance.componentDidUpdate !== 'function' && | ||
| !didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.has(ctor) | ||
| ) { | ||
| didWarnAboutGetSnapshotBeforeUpdateWithoutDidUpdate.add(ctor); | ||
| console.error( | ||
| '%s: getSnapshotBeforeUpdate() should be used with componentDidUpdate(). ' + | ||
| 'This component defines getSnapshotBeforeUpdate() only.', | ||
| getComponentNameFromType(ctor), | ||
| ); | ||
| } | ||
|
|
||
| if (typeof instance.getDerivedStateFromProps === 'function') { | ||
| console.error( | ||
| '%s: getDerivedStateFromProps() is defined as an instance method ' + | ||
| 'and will be ignored. Instead, declare it as a static method.', | ||
| name, | ||
| ); | ||
| } | ||
| if (typeof instance.getDerivedStateFromError === 'function') { | ||
| console.error( | ||
| '%s: getDerivedStateFromError() is defined as an instance method ' + | ||
| 'and will be ignored. Instead, declare it as a static method.', | ||
| name, | ||
| ); | ||
| } | ||
| if (typeof ctor.getSnapshotBeforeUpdate === 'function') { | ||
| console.error( | ||
| '%s: getSnapshotBeforeUpdate() is defined as a static method ' + | ||
| 'and will be ignored. Instead, declare it as an instance method.', | ||
| name, | ||
| ); | ||
| } | ||
| const state = instance.state; | ||
| if (state && (typeof state !== 'object' || isArray(state))) { | ||
| console.error('%s.state: must be set to an object or null', name); | ||
| } | ||
| if ( | ||
| typeof instance.getChildContext === 'function' && | ||
| typeof ctor.childContextTypes !== 'object' | ||
| ) { | ||
| console.error( | ||
| '%s.getChildContext(): childContextTypes must be defined in order to ' + | ||
| 'use getChildContext().', | ||
| name, | ||
| ); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function callComponentWillMount(type, instance) { | ||
| const oldState = instance.state; | ||
|
|
||
| if (typeof instance.componentWillMount === 'function') { | ||
| instance.componentWillMount(); | ||
| } | ||
| if (typeof instance.UNSAFE_componentWillMount === 'function') { | ||
| instance.UNSAFE_componentWillMount(); | ||
| } | ||
|
|
||
| if (oldState !== instance.state) { | ||
| if (__DEV__) { | ||
| console.error( | ||
| '%s.componentWillMount(): Assigning directly to this.state is ' + | ||
| "deprecated (except inside a component's " + | ||
| 'constructor). Use setState instead.', | ||
| getComponentNameFromType(type) || 'Component', | ||
| ); | ||
| } | ||
| classComponentUpdater.enqueueReplaceState(instance, instance.state, null); | ||
| } | ||
| } | ||
|
|
||
| function processUpdateQueue( | ||
| internalInstance: InternalInstance, | ||
| inst: any, | ||
| props: any, | ||
| maskedLegacyContext: any, | ||
| ): void { | ||
| if (internalInstance.queue !== null && internalInstance.queue.length > 0) { | ||
| const oldQueue = internalInstance.queue; | ||
| const oldReplace = internalInstance.replace; | ||
| internalInstance.queue = null; | ||
| internalInstance.replace = false; | ||
|
|
||
| if (oldReplace && oldQueue.length === 1) { | ||
| inst.state = oldQueue[0]; | ||
| } else { | ||
| let nextState = oldReplace ? oldQueue[0] : inst.state; | ||
| let dontMutate = true; | ||
| for (let i = oldReplace ? 1 : 0; i < oldQueue.length; i++) { | ||
| const partial = oldQueue[i]; | ||
| const partialState = | ||
| typeof partial === 'function' | ||
| ? partial.call(inst, nextState, props, maskedLegacyContext) | ||
| : partial; | ||
| if (partialState != null) { | ||
| if (dontMutate) { | ||
| dontMutate = false; | ||
| nextState = Object.assign({}, nextState, partialState); | ||
| } else { | ||
| Object.assign(nextState, partialState); | ||
| } | ||
| } | ||
| } | ||
| inst.state = nextState; | ||
| } | ||
| } else { | ||
| internalInstance.queue = null; | ||
| } | ||
| } | ||
|
|
||
| // Invokes the mount life-cycles on a previously never rendered instance. | ||
| export function mountClassInstance( | ||
| instance: any, | ||
| ctor: any, | ||
| newProps: any, | ||
| maskedLegacyContext: any, | ||
| ): void { | ||
| if (__DEV__) { | ||
| checkClassInstance(instance, ctor, newProps); | ||
| } | ||
|
|
||
| const initialState = instance.state !== undefined ? instance.state : null; | ||
|
|
||
| instance.updater = classComponentUpdater; | ||
| instance.props = newProps; | ||
| instance.state = initialState; | ||
| // We don't bother initializing the refs object on the server, since we're not going to resolve them anyway. | ||
|
|
||
| // The internal instance will be used to manage updates that happen during this mount. | ||
| const internalInstance: InternalInstance = { | ||
| queue: null, | ||
| replace: false, | ||
| }; | ||
| setInstance(instance, internalInstance); | ||
|
|
||
| const contextType = ctor.contextType; | ||
| if (typeof contextType === 'object' && contextType !== null) { | ||
| // TODO: Implement Context. | ||
| // instance.context = readContext(contextType); | ||
| throw new Error('Context is not yet implemented.'); | ||
| } else if (disableLegacyContext) { | ||
| instance.context = emptyContextObject; | ||
| } else { | ||
| instance.context = maskedLegacyContext; | ||
| } | ||
|
|
||
| if (__DEV__) { | ||
| if (instance.state === newProps) { | ||
| const componentName = getComponentNameFromType(ctor) || 'Component'; | ||
| if (!didWarnAboutDirectlyAssigningPropsToState.has(componentName)) { | ||
| didWarnAboutDirectlyAssigningPropsToState.add(componentName); | ||
| console.error( | ||
| '%s: It is not recommended to assign props directly to state ' + | ||
| "because updates to props won't be reflected in state. " + | ||
| 'In most cases, it is better to use props directly.', | ||
| componentName, | ||
| ); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| const getDerivedStateFromProps = ctor.getDerivedStateFromProps; | ||
| if (typeof getDerivedStateFromProps === 'function') { | ||
| instance.state = applyDerivedStateFromProps( | ||
| instance, | ||
| ctor, | ||
| getDerivedStateFromProps, | ||
| initialState, | ||
| newProps, | ||
| ); | ||
| } | ||
|
|
||
| // In order to support react-lifecycles-compat polyfilled components, | ||
| // Unsafe lifecycles should not be invoked for components using the new APIs. | ||
| if ( | ||
| typeof ctor.getDerivedStateFromProps !== 'function' && | ||
| typeof instance.getSnapshotBeforeUpdate !== 'function' && | ||
| (typeof instance.UNSAFE_componentWillMount === 'function' || | ||
| typeof instance.componentWillMount === 'function') | ||
| ) { | ||
| callComponentWillMount(ctor, instance); | ||
| // If we had additional state updates during this life-cycle, let's | ||
| // process them now. | ||
| processUpdateQueue( | ||
| internalInstance, | ||
| instance, | ||
| newProps, | ||
| maskedLegacyContext, | ||
| ); | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /** | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| * | ||
| * @flow | ||
| */ | ||
|
|
||
| import {disableLegacyContext} from 'shared/ReactFeatureFlags'; | ||
| import getComponentNameFromType from 'shared/getComponentNameFromType'; | ||
| import invariant from 'shared/invariant'; | ||
| import checkPropTypes from 'shared/checkPropTypes'; | ||
|
|
||
| let warnedAboutMissingGetChildContext; | ||
|
|
||
| if (__DEV__) { | ||
| warnedAboutMissingGetChildContext = {}; | ||
| } | ||
|
|
||
| export const emptyContextObject = {}; | ||
| if (__DEV__) { | ||
| Object.freeze(emptyContextObject); | ||
| } | ||
|
|
||
| export function getMaskedContext(type: any, unmaskedContext: Object): Object { | ||
| if (disableLegacyContext) { | ||
| return emptyContextObject; | ||
| } else { | ||
| const contextTypes = type.contextTypes; | ||
| if (!contextTypes) { | ||
| return emptyContextObject; | ||
| } | ||
|
|
||
| const context = {}; | ||
| for (const key in contextTypes) { | ||
| context[key] = unmaskedContext[key]; | ||
| } | ||
|
|
||
| if (__DEV__) { | ||
| const name = getComponentNameFromType(type) || 'Unknown'; | ||
| checkPropTypes(contextTypes, context, 'context', name); | ||
| } | ||
|
|
||
| return context; | ||
| } | ||
| } | ||
|
|
||
| export function processChildContext( | ||
| type: any, | ||
| instance: any, | ||
| parentContext: Object, | ||
| childContextTypes: Object, | ||
| ): Object { | ||
| if (disableLegacyContext) { | ||
| return parentContext; | ||
| } else { | ||
| // TODO (bvaughn) Replace this behavior with an invariant() in the future. | ||
| // It has only been added in Fiber to match the (unintentional) behavior in Stack. | ||
| if (typeof instance.getChildContext !== 'function') { | ||
| if (__DEV__) { | ||
| const componentName = getComponentNameFromType(type) || 'Unknown'; | ||
|
|
||
| if (!warnedAboutMissingGetChildContext[componentName]) { | ||
| warnedAboutMissingGetChildContext[componentName] = true; | ||
| console.error( | ||
| '%s.childContextTypes is specified but there is no getChildContext() method ' + | ||
| 'on the instance. You can either define getChildContext() on %s or remove ' + | ||
| 'childContextTypes from it.', | ||
| componentName, | ||
| componentName, | ||
| ); | ||
| } | ||
| } | ||
| return parentContext; | ||
| } | ||
|
|
||
| const childContext = instance.getChildContext(); | ||
| for (const contextKey in childContext) { | ||
| invariant( | ||
| contextKey in childContextTypes, | ||
| '%s.getChildContext(): key "%s" is not defined in childContextTypes.', | ||
| getComponentNameFromType(type) || 'Unknown', | ||
| contextKey, | ||
| ); | ||
| } | ||
| if (__DEV__) { | ||
| const name = getComponentNameFromType(type) || 'Unknown'; | ||
| checkPropTypes(childContextTypes, childContext, 'child context', name); | ||
| } | ||
|
|
||
| return {...parentContext, ...childContext}; | ||
| } | ||
| } |
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Why no
queue === nullwarnNoop branch here?There was a problem hiding this comment.
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I don’t know. It’s not in the old one but it does seem like it should.