82 lines
2.0 KiB
JavaScript
82 lines
2.0 KiB
JavaScript
import React from 'react';
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import PropTypes from 'prop-types';
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import styles from './styles.scss';
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import { findDOMNode } from 'react-dom';
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export default class ClosedCaptions extends React.Component {
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constructor(props) {
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super(props);
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this.shouldScrollBottom = false;
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}
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renderCaptions(caption) {
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const text = caption.captions;
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const captionStyles = {
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whiteSpace: 'pre-wrap',
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wordWrap: 'break-word',
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fontFamily: this.props.fontFamily,
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fontSize: this.props.fontSize,
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color: this.props.fontColor,
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};
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return (
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<span
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style={captionStyles}
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dangerouslySetInnerHTML={{ __html: text }}
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key={caption.index}
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/>
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);
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}
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componentDidMount() {
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// to let the whiteboard know that the presentation area's size has changed
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window.dispatchEvent(new Event('resize'));
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}
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componentWillUnmount() {
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// to let the whiteboard know that the presentation area's size has changed
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window.dispatchEvent(new Event('resize'));
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}
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componentWillUpdate() {
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const node = findDOMNode(this.ccScrollArea);
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// number 4 is for the border
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// offset height includes the border, but scrollheight doesn't
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this.shouldScrollBottom = node.scrollTop + node.offsetHeight - 4 === node.scrollHeight;
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}
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componentDidUpdate() {
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if (this.shouldScrollBottom) {
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const node = findDOMNode(this.ccScrollArea);
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node.scrollTop = node.scrollHeight;
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}
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}
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render() {
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const {
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locale,
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captions,
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backgroundColor,
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} = this.props;
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return (
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<div disabled className={styles.ccbox}>
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<div className={styles.title}>
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<p> {locale || 'Locale is not selected'} </p>
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</div>
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<div
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ref={(ref) => { this.ccScrollArea = ref; }}
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className={styles.frame}
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style={{ background: backgroundColor }}
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>
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{captions[locale] ? captions[locale].captions.map(caption => (
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this.renderCaptions(caption)
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)) : null }
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</div>
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</div>
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);
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}
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}
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