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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import PropTypes from 'prop-types';
import React from 'react';
import {postListScrollChange} from 'actions/global_actions.jsx';
const WAIT_FOR_HEIGHT_TIMEOUT = 100;
export default class MarkdownImage extends React.PureComponent {
static propTypes = {
/*
* The href of the image to be loaded
*/
href: PropTypes.string
}
constructor(props) {
super(props);
this.heightTimeout = 0;
}
componentDidMount() {
this.waitForHeight();
}
componentDidUpdate(prevProps) {
if (this.props.href !== prevProps.href) {
this.waitForHeight();
}
}
componentWillUnmount() {
this.stopWaitingForHeight();
}
waitForHeight = () => {
if (this.refs.image.height) {
setTimeout(postListScrollChange, 0);
this.heightTimeout = 0;
} else {
this.heightTimeout = setTimeout(this.waitForHeight, WAIT_FOR_HEIGHT_TIMEOUT);
}
}
stopWaitingForHeight = () => {
if (this.heightTimeout !== 0) {
clearTimeout(this.heightTimeout);
this.heightTimeout = 0;
}
}
render() {
return (
<img
{...this.props}
ref='image'
onLoad={this.stopWaitingForHeight}
onError={this.stopWaitingForHeight}
/>
);
}
}
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