100 lines
3.1 KiB
JavaScript
Executable File
100 lines
3.1 KiB
JavaScript
Executable File
// Last time updated at Sep 07, 2014, 08:32:23
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// Latest file can be found here: https://cdn.webrtc-experiment.com/getScreenId.js
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// Muaz Khan - www.MuazKhan.com
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// MIT License - www.WebRTC-Experiment.com/licence
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// Documentation - https://github.com/muaz-khan/WebRTC-Experiment/tree/master/getScreenId.js
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// ______________
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// getScreenId.js
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/*
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getScreenId(function (error, sourceId, screen_constraints) {
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// error == null || 'permission-denied' || 'not-installed' || 'installed-disabled' || 'not-chrome'
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// sourceId == null || 'string' || 'firefox'
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if(sourceId == 'firefox') {
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navigator.mozGetUserMedia(screen_constraints, onSuccess, onFailure);
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}
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else navigator.webkitGetUserMedia(screen_constraints, onSuccess, onFailure);
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});
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*/
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(function() {
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window.getScreenId = function(callback) {
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// for Firefox:
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// sourceId == 'firefox'
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// screen_constraints = {...}
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if (!!navigator.mozGetUserMedia) {
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callback(null, 'firefox', {
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video: {
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mozMediaSource: 'window',
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mediaSource: 'window'
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}
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});
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return;
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}
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postMessage();
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window.addEventListener('message', onIFrameCallback);
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function onIFrameCallback(event) {
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if (!event.data) return;
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if (event.data.chromeMediaSourceId) {
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if (event.data.chromeMediaSourceId === 'PermissionDeniedError') {
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callback('permission-denied');
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} else callback(null, event.data.chromeMediaSourceId, getScreenConstraints(null, event.data.chromeMediaSourceId));
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}
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if (event.data.chromeExtensionStatus) {
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callback(event.data.chromeExtensionStatus, null, getScreenConstraints(event.data.chromeExtensionStatus));
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}
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// this event listener is no more needed
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window.removeEventListener('message', onIFrameCallback);
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}
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};
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function getScreenConstraints(error, sourceId) {
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var screen_constraints = {
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audio: false,
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video: {
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mandatory: {
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chromeMediaSource: error ? 'screen' : 'desktop',
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maxWidth: window.screen.width > 1920 ? window.screen.width : 1920,
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maxHeight: window.screen.height > 1080 ? window.screen.height : 1080
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},
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optional: []
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}
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};
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if (sourceId) {
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screen_constraints.video.mandatory.chromeMediaSourceId = sourceId;
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}
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return screen_constraints;
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}
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function postMessage() {
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if (!iframe.isLoaded) {
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setTimeout(postMessage, 100);
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return;
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}
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iframe.contentWindow.postMessage({
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captureSourceId: true
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}, '*');
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}
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var iframe = document.createElement('iframe');
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iframe.onload = function() {
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iframe.isLoaded = true;
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};
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iframe.src = 'https://www.webrtc-experiment.com/getSourceId/';
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iframe.style.display = 'none';
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(document.body || document.documentElement).appendChild(iframe);
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})();
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