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