37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
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/*
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* Copyright (c) 2018 The adapter.js project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree.
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*/
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/* eslint-env node */
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'use strict';
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export function shimGetDisplayMedia(window, preferredMediaSource) {
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if (window.navigator.mediaDevices &&
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'getDisplayMedia' in window.navigator.mediaDevices) {
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return;
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}
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if (!(window.navigator.mediaDevices)) {
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return;
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}
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window.navigator.mediaDevices.getDisplayMedia =
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function getDisplayMedia(constraints) {
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if (!(constraints && constraints.video)) {
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const err = new DOMException('getDisplayMedia without video ' +
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'constraints is undefined');
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err.name = 'NotFoundError';
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// from https://heycam.github.io/webidl/#idl-DOMException-error-names
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err.code = 8;
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return Promise.reject(err);
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}
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if (constraints.video === true) {
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constraints.video = {mediaSource: preferredMediaSource};
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} else {
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constraints.video.mediaSource = preferredMediaSource;
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}
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return window.navigator.mediaDevices.getUserMedia(constraints);
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};
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}
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