mirror of
https://github.com/status-im/react-native.git
synced 2025-01-15 03:56:03 +00:00
fb7fe2d4e8
Summary:
This does 2 things:
- modernize the component to use ES6 + flow
- assign `rootTag` to the child context
Each view in RN has its own `reactTag`. The reactTag for a root view is called `rootTag`. When there are multiple react root views active within the app (e.g. in a hybrid environment), rootTag is the only reliable "label" to differentiate them. This is especially useful when we want to limit an event/activity on a particular root view, instead of affecting all active root views. This allows components to do:
```
class Foo extends React.Component {
static contextTypes = {
rootTag: React.PropTypes.number,
};
componentDidMount() {
// Get the root tag of this component, which is static for all components under the same root view
console.log(this.context.rootTag);
}
}
```
In a pure JS RN app environment, there will always be exactly 1 root view, so `rootTag` may usually be ignored.
Reviewed By: yungsters
Differential Revision: D4130376
fbshipit-source-id: 559b67615f487bad754b5832ad4a02bcef05be2a
114 lines
2.7 KiB
JavaScript
114 lines
2.7 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule AppContainer
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* @flow
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*/
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'use strict';
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const EmitterSubscription = require('EmitterSubscription');
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const RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
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const React = require('React');
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const ReactNative = require('ReactNative');
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const StyleSheet = require('StyleSheet');
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const View = require('View');
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// TODO (fkg): make rootTag required
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type Context = {
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rootTag: ?number,
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};
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type Props = {
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children?: React.Children,
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rootTag?: number,
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};
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type State = {
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inspector: ?React.Element<*>,
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mainKey: number,
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};
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class AppContainer extends React.Component {
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props: Props;
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state: State = {
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inspector: null,
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mainKey: 1,
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};
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_mainRef: ?React.Element<*>;
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_subscription: ?EmitterSubscription = null;
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static childContextTypes = {
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rootTag: React.PropTypes.number,
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};
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getChildContext(): Context {
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return {
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rootTag: this.props.rootTag,
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};
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}
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componentDidMount(): void {
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if (__DEV__) {
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this._subscription = RCTDeviceEventEmitter.addListener(
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'toggleElementInspector',
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() => {
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const Inspector = require('Inspector');
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const inspector = this.state.inspector
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? null
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: <Inspector
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inspectedViewTag={ReactNative.findNodeHandle(this._mainRef)}
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onRequestRerenderApp={(updateInspectedViewTag) => {
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this.setState(
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(s) => ({mainKey: s.mainKey + 1}),
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() => updateInspectedViewTag(
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ReactNative.findNodeHandle(this._mainRef)
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)
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);
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}}
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/>;
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this.setState({inspector});
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},
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);
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}
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}
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componentWillUnmount(): void {
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if (this._subscription) {
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this._subscription.remove();
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}
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}
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render(): React.Element<*> {
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let yellowBox = null;
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if (__DEV__) {
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const YellowBox = require('YellowBox');
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yellowBox = <YellowBox />;
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}
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return (
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<View style={styles.appContainer}>
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<View
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collapsable={!this.state.inspector}
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key={this.state.mainKey}
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style={styles.appContainer} ref={(ref) => {this._mainRef = ref;}}>
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{this.props.children}
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</View>
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{yellowBox}
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{this.state.inspector}
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</View>
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);
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}
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}
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const styles = StyleSheet.create({
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appContainer: {
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flex: 1,
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},
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});
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module.exports = AppContainer;
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