katoikia-app/web-ui/web-react/node_modules/react-router/modules/Router.js

101 lines
2.5 KiB
JavaScript

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