61a63e47f4
* Stash noImplicitAny work * Stash * Fix imports * Iterate * Fix tests * Delint * Fix tests
70 lines
2.1 KiB
TypeScript
70 lines
2.1 KiB
TypeScript
/*
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Copyright 2022 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import React from "react";
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import UIStore, { UI_EVENTS } from "../../../stores/UIStore";
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interface IProps {
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sensor: Element;
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breakpoint: number;
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onMeasurement(narrow: boolean): void;
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}
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export default class Measured extends React.PureComponent<IProps> {
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private static instanceCount = 0;
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private readonly instanceId: number;
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public static defaultProps = {
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breakpoint: 500,
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};
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public constructor(props: IProps) {
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super(props);
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this.instanceId = Measured.instanceCount++;
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}
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public componentDidMount(): void {
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UIStore.instance.on(`Measured${this.instanceId}`, this.onResize);
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}
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public componentDidUpdate(prevProps: Readonly<IProps>): void {
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const previous = prevProps.sensor;
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const current = this.props.sensor;
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if (previous === current) return;
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if (previous) {
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UIStore.instance.stopTrackingElementDimensions(`Measured${this.instanceId}`);
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}
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if (current) {
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UIStore.instance.trackElementDimensions(`Measured${this.instanceId}`, this.props.sensor);
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}
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}
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public componentWillUnmount(): void {
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UIStore.instance.off(`Measured${this.instanceId}`, this.onResize);
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UIStore.instance.stopTrackingElementDimensions(`Measured${this.instanceId}`);
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}
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private onResize = (type: UI_EVENTS, entry: ResizeObserverEntry): void => {
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if (type !== UI_EVENTS.Resize) return;
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this.props.onMeasurement(entry.contentRect.width <= this.props.breakpoint);
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};
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public render(): JSX.Element {
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return null;
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}
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}
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