101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
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import React from "react";
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import PropTypes from "prop-types";
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import warning from "tiny-warning";
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import HistoryContext from "./HistoryContext.js";
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import RouterContext from "./RouterContext.js";
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/**
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* The public API for putting history on context.
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*/
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class Router extends React.Component {
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static computeRootMatch(pathname) {
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return { path: "/", url: "/", params: {}, isExact: pathname === "/" };
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}
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constructor(props) {
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super(props);
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this.state = {
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location: props.history.location
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};
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// This is a bit of a hack. We have to start listening for location
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// changes here in the constructor in case there are any <Redirect>s
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// on the initial render. If there are, they will replace/push when
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// they mount and since cDM fires in children before parents, we may
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// get a new location before the <Router> is mounted.
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this._isMounted = false;
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this._pendingLocation = null;
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if (!props.staticContext) {
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this.unlisten = props.history.listen(location => {
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this._pendingLocation = location;
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});
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}
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}
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componentDidMount() {
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this._isMounted = true;
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if (this.unlisten) {
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// Any pre-mount location changes have been captured at
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// this point, so unregister the listener.
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this.unlisten();
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}
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if (!this.props.staticContext) {
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this.unlisten = this.props.history.listen(location => {
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if (this._isMounted) {
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this.setState({ location });
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}
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});
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}
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if (this._pendingLocation) {
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this.setState({ location: this._pendingLocation });
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}
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}
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componentWillUnmount() {
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if (this.unlisten) {
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this.unlisten();
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this._isMounted = false;
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this._pendingLocation = null;
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}
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}
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render() {
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return (
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<RouterContext.Provider
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value={{
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history: this.props.history,
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location: this.state.location,
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match: Router.computeRootMatch(this.state.location.pathname),
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staticContext: this.props.staticContext
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}}
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>
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<HistoryContext.Provider
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children={this.props.children || null}
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value={this.props.history}
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/>
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</RouterContext.Provider>
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);
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}
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}
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if (__DEV__) {
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Router.propTypes = {
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children: PropTypes.node,
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history: PropTypes.object.isRequired,
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staticContext: PropTypes.object
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};
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Router.prototype.componentDidUpdate = function(prevProps) {
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warning(
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prevProps.history === this.props.history,
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"You cannot change <Router history>"
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);
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};
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}
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export default Router;
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