/**
* @file remaining-time-display.js
*/
import document from 'global/document';
import Component from '../../component.js';
import * as Dom from '../../utils/dom.js';
import {bind, throttle} from '../../utils/fn.js';
import formatTime from '../../utils/format-time.js';
/**
* Displays the time left in the video
*
* @extends Component
*/
class RemainingTimeDisplay extends Component {
/**
* Creates an instance of this class.
*
* @param {Player} player
* The `Player` that this class should be attached to.
*
* @param {Object} [options]
* The key/value store of player options.
*/
constructor(player, options) {
super(player, options);
this.throttledUpdateContent = throttle(bind(this, this.updateContent), 25);
this.on(player, ['timeupdate', 'durationchange'], this.throttledUpdateContent);
}
/**
* Create the `Component`'s DOM element
*
* @return {Element}
* The element that was created.
*/
createEl() {
const el = super.createEl('div', {
className: 'vjs-remaining-time vjs-time-control vjs-control'
});
this.contentEl_ = Dom.createEl('div', {
className: 'vjs-remaining-time-display'
}, {
// tell screen readers not to automatically read the time as it changes
'aria-live': 'off'
}, Dom.createEl('span', {
className: 'vjs-control-text',
textContent: this.localize('Remaining Time')
}));
this.updateTextNode_();
el.appendChild(this.contentEl_);
return el;
}
/**
* Updates the "remaining time" text node with new content using the
* contents of the `formattedTime_` property.
*
* @private
*/
updateTextNode_() {
if (this.textNode_) {
this.contentEl_.removeChild(this.textNode_);
}
this.textNode_ = document.createTextNode(` -${this.formattedTime_ || '0:00'}`);
this.contentEl_.appendChild(this.textNode_);
}
/**
* Update remaining time display.
*
* @param {EventTarget~Event} [event]
* The `timeupdate` or `durationchange` event that caused this to run.
*
* @listens Player#timeupdate
* @listens Player#durationchange
*/
updateContent(event) {
if (this.player_.duration()) {
const formattedTime = formatTime(this.player_.remainingTime());
if (formattedTime !== this.formattedTime_) {
this.formattedTime_ = formattedTime;
this.requestAnimationFrame(this.updateTextNode_);
}
}
}
}
Component.registerComponent('RemainingTimeDisplay', RemainingTimeDisplay);
export default RemainingTimeDisplay;