76 lines
2.4 KiB
JavaScript
76 lines
2.4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const {
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createRef,
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PureComponent,
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} = require("resource://devtools/client/shared/vendor/react.mjs");
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const dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
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const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.mjs");
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class CurrentTimeLabel extends PureComponent {
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static get propTypes() {
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return {
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addAnimationsCurrentTimeListener: PropTypes.func.isRequired,
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removeAnimationsCurrentTimeListener: PropTypes.func.isRequired,
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timeScale: PropTypes.object.isRequired,
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};
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}
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constructor(props) {
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super(props);
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this._ref = createRef();
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const { addAnimationsCurrentTimeListener } = props;
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this.onCurrentTimeUpdated = this.onCurrentTimeUpdated.bind(this);
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addAnimationsCurrentTimeListener(this.onCurrentTimeUpdated);
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}
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componentWillUnmount() {
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const { removeAnimationsCurrentTimeListener } = this.props;
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removeAnimationsCurrentTimeListener(this.onCurrentTimeUpdated);
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}
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onCurrentTimeUpdated(currentTime) {
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const { timeScale } = this.props;
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const text = formatStopwatchTime(currentTime - timeScale.zeroPositionTime);
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// onCurrentTimeUpdated is bound to requestAnimationFrame.
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// As to update the component too frequently has performance issue if React controlled,
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// update raw component directly. See Bug 1699039.
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this._ref.current.textContent = text;
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}
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render() {
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return dom.label({ className: "current-time-label", ref: this._ref });
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}
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}
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/**
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* Format a timestamp (in ms) as a mm:ss.mmm string.
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*
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* @param {Number} time
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* @return {String}
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*/
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function formatStopwatchTime(time) {
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// Format falsy values as 0
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if (!time) {
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return "00:00.000";
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}
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const sign = time < 0 ? "-" : "";
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let milliseconds = parseInt(Math.abs(time % 1000), 10);
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let seconds = parseInt(Math.abs(time / 1000) % 60, 10);
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let minutes = parseInt(Math.abs(time / (1000 * 60)), 10);
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minutes = minutes.toString().padStart(2, "0");
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seconds = seconds.toString().padStart(2, "0");
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milliseconds = milliseconds.toString().padStart(3, "0");
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return `${sign}${minutes}:${seconds}.${milliseconds}`;
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}
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module.exports = CurrentTimeLabel;
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