Merge pull request #227 from nextcloud/screensharing

Add screensharing support.

css/style.css

@@ -146,6 +146,9 @@
     background-position-y: 8px !important;
 }
 
+/**
+ * Video styles
+ */
 
 #videos {
 	position: absolute;
@@ -264,6 +267,14 @@ video {
 	display: block !important;
 }
 
+.participants-1 #video-fullscreen {
+	display: none;
+}
+
+.participants-1 #toggleScreensharing {
+	display: none;
+}
+
 /* big speaker video */
 .participants-1 .videoContainer,
 .participants-2 .videoContainer,
@@ -313,10 +324,23 @@ video {
 #app-content.participants-7,
 #app-content.participants-8,
 #app-content.participants-9,
-#app-content.participants-10 {
+#app-content.participants-10,
+#app-content.screensharing {
 	background-color: #000;
 }
 
+#app-content.screensharing .videoContainer video {
+	max-height: 200px;
+	background-color: transparent;
+	box-shadow: 0;
+}
+
+#app-content.screensharing #localScreenContainer {
+	height: calc(100% - 200px);
+	overflow: scroll;
+	background-color: transparent;
+}
+
 .nameIndicator {
 	position: absolute;
 	bottom: 0;
@@ -327,7 +351,7 @@ video {
 	text-align: center;
 	font-size: 20px;
 	white-space: nowrap;
-	overflow: hidden;
+	overflow: visible;
 	text-overflow: ellipsis;
 }
 .videoView .nameIndicator {
@@ -348,6 +372,17 @@ video {
 	padding: 12px 35%;
 }
 
+#video-fullscreen {
+	position: absolute;
+	right: 0px;
+	z-index: 90;
+}
+
+#video-fullscreen.public {
+	top: 45px;
+}
+
+#video-fullscreen,
 .nameIndicator button {
 	background-color: transparent;
 	border: none;
@@ -355,8 +390,10 @@ video {
 	height: 44px;
 	background-size: 25px;
 }
+
 .nameIndicator button.audio-disabled,
-.nameIndicator button.video-disabled {
+.nameIndicator button.video-disabled,
+.nameIndicator button.screensharing-disabled {
 	opacity: .7;
 }
 

js/app.js

@@ -155,6 +155,11 @@
 				});
 			});
 
+			// Initialize button tooltips
+			$('[data-toggle="tooltip"]').tooltip({trigger: 'hover'}).click(function() {
+				$(this).tooltip('hide');
+			});
+
 			$('#hideVideo').click(function() {
 				if(!OCA.SpreedMe.app.videoWasEnabledAtLeastOnce) {
 					// don't allow clicking the video toggle
@@ -173,6 +178,7 @@
 					localStorage.setItem("videoDisabled", true);
 				}
 			});
+
 			$('#mute').click(function() {
 				if (OCA.SpreedMe.webrtc.webrtc.isAudioEnabled()) {
 					OCA.SpreedMe.app.disableAudio();
@@ -197,6 +203,7 @@
 					} else if (fullscreenElem.msRequestFullscreen) {
 						fullscreenElem.msRequestFullscreen();
 					}
+					$(this).attr('data-original-title', 'Exit fullscreen');
 				} else {
 					if (document.exitFullscreen) {
 						document.exitFullscreen();
@@ -207,6 +214,60 @@
 					} else if (document.msExitFullscreen) {
 						document.msExitFullscreen();
 					}
+					$(this).attr('data-original-title', 'Fullscreen');
+				}
+			});
+
+			var screensharingStopped = function() {
+				console.log("Screensharing now stopped");
+				$('#toggleScreensharing').attr('data-original-title', 'Enable screensharing')
+					.addClass('screensharing-disabled icon-screen-off-white')
+					.removeClass('icon-screen-white');
+			};
+
+			OCA.SpreedMe.webrtc.on('localScreenStopped', function() {
+				screensharingStopped();
+			});
+
+			$('#toggleScreensharing').click(function() {
+				var webrtc = OCA.SpreedMe.webrtc;
+				if (!webrtc.capabilities.supportScreenSharing) {
+					OC.Notification.showTemporary(t('spreed', 'Screensharing is not supported by your browser.'));
+					return;
+				}
+
+				if (webrtc.getLocalScreen()) {
+					webrtc.stopScreenShare();
+					screensharingStopped();
+				} else {
+					webrtc.shareScreen(function(err) {
+						if (!err) {
+							OC.Notification.showTemporary(t('spreed', 'Screensharing is about to start…'));
+							$('#toggleScreensharing').attr('data-original-title', 'Stop screensharing')
+								.removeClass('screensharing-disabled icon-screen-off-white')
+								.addClass('icon-screen-white');
+							return;
+						}
+
+						switch (err.name) {
+							case "HTTPS_REQUIRED":
+								OC.Notification.showTemporary(t('spreed', 'Screensharing requires the page to be loaded through HTTPS.'));
+								break;
+							case "PERMISSION_DENIED":
+							case "NotAllowedError":
+							case "CEF_GETSCREENMEDIA_CANCELED":  // Experimental, may go away in the future.
+								OC.Notification.showTemporary(t('spreed', 'The screensharing request has been cancelled.'));
+								break;
+							case "EXTENSION_UNAVAILABLE":
+								// TODO(fancycode): Show popup with links to Chrome/Firefox extensions.
+								OC.Notification.showTemporary(t('spreed', 'An extension is required to start screensharing.'));
+								break;
+							default:
+								OC.Notification.showTemporary(t('spreed', 'An error occurred while starting screensharing.'));
+								console.log("Could not start screensharing", err);
+								break;
+						}
+					});
 				}
 			});
 
@@ -446,7 +507,7 @@
 		},
 		enableAudio: function() {
 			OCA.SpreedMe.webrtc.unmute();
-			$('#mute').data('title', 'Mute audio')
+			$('#mute').attr('data-original-title', 'Mute audio')
 				.removeClass('audio-disabled icon-audio-off-white')
 				.addClass('icon-audio-white');
 
@@ -454,7 +515,7 @@
 		},
 		disableAudio: function() {
 			OCA.SpreedMe.webrtc.mute();
-			$('#mute').data('title', 'Enable audio')
+			$('#mute').attr('data-original-title', 'Enable audio')
 				.addClass('audio-disabled icon-audio-off-white')
 				.removeClass('icon-audio-white');
 
@@ -466,9 +527,10 @@
 			var localVideo = $hideVideoButton.closest('.videoView').find('#localVideo');
 
 			OCA.SpreedMe.webrtc.resumeVideo();
-			$hideVideoButton.data('title', 'Disable video')
+			$hideVideoButton.attr('data-original-title', 'Disable video')
 				.removeClass('video-disabled icon-video-off-white')
 				.addClass('icon-video-white');
+
 			avatarContainer.hide();
 			localVideo.show();
 
@@ -479,7 +541,7 @@
 			var avatarContainer = $hideVideoButton.closest('.videoView').find('.avatar-container');
 			var localVideo = $hideVideoButton.closest('.videoView').find('#localVideo');
 
-			$hideVideoButton.data('title', 'Enable video')
+			$hideVideoButton.attr('data-original-title', 'Enable video')
 				.addClass('video-disabled icon-video-off-white')
 				.removeClass('icon-video-white');
 

js/simplewebrtc.js

@@ -3971,28 +3971,20 @@
 			var ffver = parseInt(window.navigator.userAgent.match(/Firefox\/(.*)/)[1], 10);
 			if (ffver >= 33) {
 				constraints = (hasConstraints && constraints) || {
-						video: {
+					video: {
-							mozMediaSource: 'window',
+						mozMediaSource: 'window',
-							mediaSource: 'window'
+						mediaSource: 'window'
-						}
-					};
-				getUserMedia(constraints, function (err, stream) {
-					callback(err, stream);
-					// workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
-					if (!err) {
-						var lastTime = stream.currentTime;
-						var polly = window.setInterval(function () {
-							if (!stream) window.clearInterval(polly);
-							if (stream.currentTime == lastTime) {
-								window.clearInterval(polly);
-								if (stream.onended) {
-									stream.onended();
-								}
-							}
-							lastTime = stream.currentTime;
-						}, 500);
 					}
-				});
+				};
+				// Notify extension to add domain to whitelist and defer actual
+				// getUserMedia call until extension finished adding the domain.
+				var pending = window.setTimeout(function () {
+					error = new Error('NavigatorUserMediaError');
+					error.name = 'EXTENSION_UNAVAILABLE';
+					return callback(error);
+				}, 1000);
+				cache[pending] = [callback, constraints];
+				window.postMessage({ type: 'webrtcStartScreensharing', id: pending }, '*');
 			} else {
 				error = new Error('NavigatorUserMediaError');
 				error.name = 'EXTENSION_UNAVAILABLE'; // does not make much sense but...
@@ -4001,7 +3993,7 @@
 	};
 
 	typeof window !== 'undefined' && window.addEventListener('message', function (event) {
-		if (event.origin != window.location.origin) {
+		if (event.origin != window.location.origin && !event.isTrusted) {
 			return;
 		}
 		if (event.data.type == 'gotScreen' && cache[event.data.id]) {
@@ -4032,6 +4024,33 @@
 			}
 		} else if (event.data.type == 'getScreenPending') {
 			window.clearTimeout(event.data.id);
+		} else if (event.data.type == 'webrtcScreensharingWhitelisted' && cache[event.data.id]) {
+			var data = cache[event.data.id];
+			window.clearTimeout(event.data.id);
+			var constraints = data[1];
+			var callback = data[0];
+			delete cache[event.data.id];
+
+			getUserMedia(constraints, function (err, stream) {
+				// Notify extension to remove domain from whitelist.
+				window.postMessage({ type: 'webrtcStopScreensharing' }, '*');
+				callback(err, stream);
+				if (err) {
+					return;
+				}
+				// workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1045810
+				var lastTime = stream.currentTime;
+				var polly = window.setInterval(function () {
+					if (!stream) window.clearInterval(polly);
+					if (stream.currentTime == lastTime) {
+						window.clearInterval(polly);
+						if (stream.onended) {
+							stream.onended();
+						}
+					}
+					lastTime = stream.currentTime;
+				}, 500);
+			});
 		}
 	});
 
@@ -17739,6 +17758,9 @@
 					mLine.iceTransport.addRemoteCandidate({});
 				}
 			});
+		} else if (message.type === 'unshareScreen') {
+			this.parent.emit('unshareScreen', {id: message.from});
+			this.end();
 		}
 	};
 
@@ -18317,7 +18339,11 @@
 		if (this.getLocalScreen()) {
 			this.webrtc.stopScreenShare();
 		}
+		// Notify peers were sending to.
 		this.webrtc.peers.forEach(function (peer) {
+			if (peer.type === 'screen' && peer.sharemyscreen) {
+				peer.send('unshareScreen');
+			}
 			if (peer.broadcaster) {
 				peer.end();
 			}
@@ -18478,6 +18504,17 @@
 			}
 		});
 
+		this.on('unshareScreen', function(message) {
+			// End peers we were receiving the screensharing stream from.
+			var peers = self.getPeers(message.from, 'screen');
+			peers.forEach(function(peer) {
+				if (!peer.sharemyscreen) {
+					peer.end();
+				}
+			});
+		});
+
+
 		// log events in debug mode
 		if (this.config.debug) {
 			this.on('*', function (event, val1, val2) {

js/webrtc.js

@@ -37,10 +37,34 @@ var spreedMappingTable = [];
 
 			var appContentElement = $('#app-content'),
 				participantsClass = 'participants-' + currentUsersNo;
-			if (!appContentElement.hasClass(participantsClass)) {
+			if (!appContentElement.hasClass(participantsClass) && !appContentElement.hasClass('screensharing')) {
 				appContentElement.attr('class', '').addClass(participantsClass);
 			}
 
+			//Send shared screen to new participants
+			var webrtc = OCA.SpreedMe.webrtc;
+			if (webrtc.getLocalScreen()) {
+				var newUsers = currentUsersInRoom.diff(previousUsersInRoom);
+				var currentUser = webrtc.connection.getSessionid();
+				newUsers.forEach(function(user) {
+					if (user !== currentUser) {
+						var peer = webrtc.webrtc.createPeer({
+								id: user,
+								type: 'screen',
+								sharemyscreen: true,
+								enableDataChannels: false,
+								receiveMedia: {
+									offerToReceiveAudio: 0,
+									offerToReceiveVideo: 0
+								},
+								broadcaster: currentUser,
+						});
+						webrtc.emit('createdPeer', peer);
+						peer.start();
+					}
+				});
+			}
+
 			var disconnectedUsers = previousUsersInRoom.diff(currentUsersInRoom);
 			disconnectedUsers.forEach(function(user) {
 				console.log('XXX Remove peer', user);
@@ -130,6 +154,17 @@ var spreedMappingTable = [];
 
 		var spreedListofSpeakers = {};
 		var latestSpeakerId = null;
+		var screenSharingActive = false;
+
+		window.addEventListener('resize', function() {
+			if (screenSharingActive) {
+				$('#localScreenContainer').children('video').each(function() {
+					$(this).width('100%');
+					$(this).height($('#localScreenContainer').height());
+				});
+			}
+		});
+
 		OCA.SpreedMe.speakers = {
 			showStatus: function() {
 				var data = [];
@@ -155,6 +190,10 @@ var spreedMappingTable = [];
 				return '#container_' + sanitizedId + '_video_incoming';
 			},
 			switchVideoToId: function(id) {
+				if (screenSharingActive) {
+					return;
+				}
+
 				var newContainer = $(OCA.SpreedMe.speakers.getContainerId(id));
 				if(newContainer.find('video').length === 0) {
 					console.warn('promote: no video found for ID', id);
@@ -179,6 +218,14 @@ var spreedMappingTable = [];
 
 				latestSpeakerId = id;
 			},
+			unpromoteLatestSpeaker: function() {
+				if (latestSpeakerId) {
+					var oldContainer = $(OCA.SpreedMe.speakers.getContainerId(latestSpeakerId));
+					oldContainer.removeClass('promoted');
+					latestSpeakerId = null;
+					$('.videoContainer-dummy').remove();
+				}
+			},
 			updateVideoContainerDummy: function(id) {
 				var newContainer = $(OCA.SpreedMe.speakers.getContainerId(id));
 
@@ -347,6 +394,11 @@ var spreedMappingTable = [];
 
 		OCA.SpreedMe.webrtc.on('videoAdded', function(video, peer) {
 			console.log('video added', peer);
+			if (peer.type === 'screen') {
+				OCA.SpreedMe.webrtc.emit('localScreenAdded', video);
+				return;
+			}
+
 			var remotes = document.getElementById('videos');
 			if (remotes) {
 				// Indicator for username
@@ -465,6 +517,14 @@ var spreedMappingTable = [];
 
 		// a peer was removed
 		OCA.SpreedMe.webrtc.on('videoRemoved', function(video, peer) {
+			if (video.dataset.screensharing) {
+				// SimpleWebRTC notifies about stopped screensharing through
+				// the generic "videoRemoved" API, but the stream must be
+				// handled differently.
+				OCA.SpreedMe.webrtc.emit('localScreenRemoved', video);
+				return;
+			}
+
 			// a removed peer can't speak anymore ;)
 			OCA.SpreedMe.speakers.remove(peer, true);
 
@@ -489,6 +549,32 @@ var spreedMappingTable = [];
 			OCA.SpreedMe.webrtc.sendDirectlyToAll('videoOff');
 		});
 
+		// Local screen added.
+		OCA.SpreedMe.webrtc.on('localScreenAdded', function (video) {
+			var initialHeight = $('#app-content').height() - 200;
+
+			video.style.width = '100%';
+			video.style.height = initialHeight + 'px';
+
+			OCA.SpreedMe.speakers.unpromoteLatestSpeaker();
+
+			screenSharingActive = true;
+			$('#app-content').attr('class', '').addClass('screensharing');
+
+			video.dataset.screensharing = true;
+			document.getElementById('localScreenContainer').appendChild(video);
+		});
+		// Local screen removed.
+		OCA.SpreedMe.webrtc.on('localScreenRemoved', function (video) {
+			document.getElementById('localScreenContainer').removeChild(video);
+			OCA.SpreedMe.webrtc.emit('localScreenStopped');
+
+			if (!document.getElementById('localScreenContainer').hasChildNodes()) {
+				screenSharingActive = false;
+				$('#app-content').removeClass('screensharing');
+			}
+		});
+
 		// Peer changed nick
 		OCA.SpreedMe.webrtc.on('nick', function(data) {
 			var el = document.getElementById('container_' + OCA.SpreedMe.webrtc.getDomId({

templates/index-public.php

@@ -24,7 +24,7 @@ script(
 );
 ?>
 
-<div id="app" data-roomId="<?php p($_['roomId']) ?>">
+<div id="app" class="nc-enable-screensharing-extension" data-roomId="<?php p($_['roomId']) ?>">
 	<div id="app-content" class="participants-1">
 
 		<header>
@@ -49,6 +49,8 @@ script(
 			</div>
 		</header>
 
+		<button id="video-fullscreen" class="icon-fullscreen-white public" data-placement="bottom" data-toggle="tooltip" data-original-title="<?php p($l->t('Fullscreen')) ?>"></button>
+
 		<div id="video-speaking">
 
 		</div>
@@ -59,13 +61,14 @@ script(
 					<div class="avatar"></div>
 				</div>
 				<div class="nameIndicator">
-					<button id="mute" class="icon-audio-white" data-title="<?php p($l->t('Mute audio')) ?>"></button>
+					<button id="mute" class="icon-audio-white" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Mute audio')) ?>"></button>
-					<button id="hideVideo" class="icon-video-white" data-title="<?php p($l->t('Pause video')) ?>"></button>
+					<button id="hideVideo" class="icon-video-white" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Disable video')) ?>"></button>
-					<button id="video-fullscreen" class="icon-fullscreen-white" data-title="<?php p($l->t('Fullscreen')) ?>"></button>
+					<button id="toggleScreensharing" class="icon-screen-off-white screensharing-disabled" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Share screen')) ?>"></button>
 				</div>
 			</div>
 		</div>
 
+		<div id="localScreenContainer"></div>
 
 		<div id="emptycontent">
 			<div id="emptycontent-icon" class="icon-video"></div>

templates/index.php

@@ -24,7 +24,7 @@ script(
 );
 ?>
 
-<div id="app" data-roomId="<?php p($_['roomId']) ?>">
+<div id="app" class="nc-enable-screensharing-extension" data-roomId="<?php p($_['roomId']) ?>">
 	<div id="app-navigation" class="icon-loading">
 		<form id="oca-spreedme-add-room">
 			<input id="edit-roomname" type="text" placeholder="<?php p($l->t('Choose person …')) ?>"/>
@@ -35,6 +35,8 @@ script(
 
 	<div id="app-content" class="participants-1">
 
+		<button id="video-fullscreen" class="icon-fullscreen-white" data-placement="bottom" data-toggle="tooltip" data-original-title="<?php p($l->t('Fullscreen')) ?>"></button>
+
 		<div id="video-speaking">
 
 		</div>
@@ -45,13 +47,14 @@ script(
 					<div class="avatar"></div>
 				</div>
 				<div class="nameIndicator">
-					<button id="mute" class="icon-audio-white" data-title="<?php p($l->t('Mute audio')) ?>"></button>
+					<button id="mute" class="icon-audio-white" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Mute audio')) ?>"></button>
-					<button id="hideVideo" class="icon-video-white" data-title="<?php p($l->t('Pause video')) ?>"></button>
+					<button id="hideVideo" class="icon-video-white" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Disable video')) ?>"></button>
-					<button id="video-fullscreen" class="icon-fullscreen-white" data-title="<?php p($l->t('Fullscreen')) ?>"></button>
+					<button id="toggleScreensharing" class="icon-screen-off-white screensharing-disabled" data-placement="top" data-toggle="tooltip" data-original-title="<?php p($l->t('Share screen')) ?>"></button>
 				</div>
 			</div>
 		</div>
 
+		<div id="localScreenContainer"></div>
 
 		<div id="emptycontent">
 			<div id="emptycontent-icon" class="icon-video"></div>