From 61fd5a4e4a84b9aa84621b12c1a715bdc1351419 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A5var=20Aamb=C3=B8=20Fosstveit?= <havar@fosstveit.net>
Date: Mon, 25 Jun 2018 13:49:50 +0200
Subject: [PATCH] Added support for screensharing in MS Edge.

---
 app/lib/ScreenShare.js | 55 ++++++++++++++++++++++++++++++++++++++++++
 app/lib/utils.js       |  6 +++++
 2 files changed, 61 insertions(+)

diff --git a/app/lib/ScreenShare.js b/app/lib/ScreenShare.js
index 7c71b52..59111b1 100644
--- a/app/lib/ScreenShare.js
+++ b/app/lib/ScreenShare.js
@@ -189,6 +189,57 @@ class FirefoxScreenShare
 	}
 }
 
+class EdgeScreenShare
+{
+	constructor()
+	{
+		this._stream = null;
+	}
+
+	start(options = {})
+	{
+		const constraints = this._toConstraints(options);
+
+		return navigator.getDisplayMedia(constraints)
+			.then((stream) =>
+			{
+				this._stream = stream;
+
+				return Promise.resolve(stream);
+			});
+	}
+
+	stop()
+	{
+		if (this._stream instanceof MediaStream === false)
+		{
+			return;
+		}
+
+		this._stream.getTracks().forEach((track) => track.stop());
+		this._stream = null;
+	}
+
+	isScreenShareAvailable()
+	{
+		return true;
+	}
+
+	needExtension()
+	{
+		return false;
+	}
+
+	_toConstraints()
+	{
+		const constraints = {
+			video : true
+		};
+
+		return constraints;
+	}
+}
+
 class DefaultScreenShare
 {
 	isScreenShareAvailable()
@@ -216,6 +267,10 @@ export default class ScreenShare
 			{
 				return new ChromeScreenShare();
 			}
+			case 'edge':
+			{
+				return new EdgeScreenShare();
+			}
 			default:
 			{
 				return new DefaultScreenShare();
diff --git a/app/lib/utils.js b/app/lib/utils.js
index 91c8768..5a1646d 100644
--- a/app/lib/utils.js
+++ b/app/lib/utils.js
@@ -35,5 +35,11 @@ export function getBrowserType()
 		return 'chrome';
 	}
 
+	// MSEdge
+	if (ua.indexOf('edge') !== -1)
+	{
+		return 'edge';
+	}
+
 	return 'N/A';
 }