зеркало из https://github.com/mozilla/gecko-dev.git
58 строки
1.4 KiB
JavaScript
58 строки
1.4 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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/**
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* Helper class to disable panel rendering when it is in background.
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*
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* Toolbox code hides the iframes when switching to another panel
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* and triggers `visibilitychange` events.
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*
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* See devtools/client/framework/toolbox.js:setIframeVisible().
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*/
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const {
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Component,
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} = require("resource://devtools/client/shared/vendor/react.js");
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const PropTypes = require("resource://devtools/client/shared/vendor/react-prop-types.js");
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class VisibilityHandler extends Component {
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static get propTypes() {
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return {
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children: PropTypes.element.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.onVisibilityChange = this.onVisibilityChange.bind(this);
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}
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componentDidMount() {
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document.addEventListener("visibilitychange", this.onVisibilityChange);
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}
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shouldComponentUpdate() {
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return document.visibilityState == "visible";
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}
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componentWillUnmount() {
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document.removeEventListener("visibilitychange", this.onVisibilityChange);
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}
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onVisibilityChange() {
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if (document.visibilityState == "visible") {
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this.forceUpdate();
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}
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}
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render() {
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return this.props.children;
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}
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}
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module.exports = VisibilityHandler;
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