Implements "raised hand".

conference.js

     videoMuted: false,
     isSharingScreen: false,
     isDesktopSharingEnabled: false,
+    /*
+     * Whether the local "raisedHand" flag is on.
+     */
+    isHandRaised: false,
+    /*
+     * Whether the local participant is the dominant speaker in the conference.
+     */
+    isDominantSpeaker: false,
     /**
      * Open new connection and join to the conference.
      * @param {object} options
             APP.UI.handleLastNEndpoints(ids, enteringIds);
         });
         room.on(ConferenceEvents.DOMINANT_SPEAKER_CHANGED, (id) => {
+            if (this.isLocalId(id)) {
+                this.isDominantSpeaker = true;
+                this.setRaisedHand(false);
+            } else {
+                this.isDominantSpeaker = false;
+                var participant = room.getParticipantById(id);
+                if (participant) {
+                    APP.UI.setRaisedHandStatus(participant, false);
+                }
+            }
             APP.UI.markDominantSpeaker(id);
         });
 
             APP.UI.changeDisplayName(id, displayName);
         });
 
+        room.on(ConferenceEvents.PARTICIPANT_PROPERTY_CHANGED,
+                (participant, name, oldValue, newValue) => {
+            if (name === "raisedHand") {
+                APP.UI.setRaisedHandStatus(participant, newValue);
+            }
+        });
+
         room.on(ConferenceEvents.RECORDER_STATE_CHANGED, (status, error) => {
             console.log("Received recorder status change: ", status, error);
             APP.UI.updateRecordingState(status);
                 mediaDeviceHelper.setCurrentMediaDevices(devices);
                 APP.UI.onAvailableDevicesChanged(devices);
             });
+    },
+
+    /**
+     * Toggles the local "raised hand" status, if the current state allows
+     * toggling.
+     */
+    maybeToggleRaisedHand() {
+        // If we are the dominant speaker, we don't enable "raise hand".
+        if (this.isHandRaised || !this.isDominantSpeaker) {
+            this.setRaisedHand(!this.isHandRaised);
+        }
+    },
+
+    /**
+     * Sets the local "raised hand" status to a particular value.
+     */
+    setRaisedHand(raisedHand) {
+        if (raisedHand !== this.isHandRaised)
+        {
+            this.isHandRaised = raisedHand;
+            // Advertise the updated status
+            room.setLocalParticipantProperty("raisedHand", raisedHand);
+            // Update the view
+            APP.UI.setLocalRaisedHandStatus(raisedHand);
+        }
     }
 };

css/videolayout_default.css

     z-index: 3;
 }
 
-.videocontainer>span.dominantspeakerindicator {
+.videocontainer>span.indicator {
     bottom: 0px;
     left: 0px;
     width: 25px;
     border: 0px;
 }
 
-#speakerindicatoricon {
+#indicatoricon {
     padding-top: 5px;
 }
 

lang/main.json

     "participant": "Participant",
     "me": "me",
     "speaker": "Speaker",
+    "raisedHand": "Would like to speak",
     "defaultNickname": "ex. Jane Pink",
     "defaultLink": "e.g. __url__",
     "calling": "Calling __name__ ...",
         "grantedTo": "Moderator rights granted to __to__!",
         "grantedToUnknown": "Moderator rights granted to $t(somebody)!",
         "muted": "You have started the conversation muted.",
-        "mutedTitle": "You're muted!"
+        "mutedTitle": "You're muted!",
+        "raisedHand": "Would like to speak."
     },
     "dialog": {
         "kickMessage": "Ouch! You have been kicked out of the meet!",

modules/UI/UI.js

 };
 
 /**
- * Intitialize conference UI.
+ * Sets the "raised hand" status for a participant.
+ */
+UI.setRaisedHandStatus = (participant, raisedHandStatus) => {
+    VideoLayout.setRaisedHandStatus(participant.getId(), raisedHandStatus);
+    if (raisedHandStatus) {
+        messageHandler.notify(participant.getDisplayName(), 'notify.somebody',
+                          'connected', 'notify.raisedHand');
+    }
+};
+
+/**
+ * Sets the local "raised hand" status.
+ */
+UI.setLocalRaisedHandStatus = (raisedHandStatus) => {
+    VideoLayout.setRaisedHandStatus(APP.conference.localId, raisedHandStatus);
+};
+
+/**
+ * Initialize conference UI.
  */
 UI.initConference = function () {
     let id = APP.conference.localId;

modules/UI/util/MessageHandler.js

     },
 
     /**
-     * Displayes notification.
-     * @param displayName display name of the participant that is associated with the notification.
-     * @param displayNameKey the key from the language file for the display name.
+     * Displays a notification.
+     * @param displayName the display name of the participant that is
+     * associated with the notification.
+     * @param displayNameKey the key from the language file for the display
+     * name. Only used if displayName i not provided.
      * @param cls css class for the notification
-     * @param messageKey the key from the language file for the text of the message.
+     * @param messageKey the key from the language file for the text of the
+     * message.
      * @param messageArguments object with the arguments for the message.
      * @param options object with language options.
      */
-    notify: function(displayName, displayNameKey,
-                         cls, messageKey, messageArguments, options) {
+    notify: function(displayName, displayNameKey, cls, messageKey,
+                     messageArguments, options) {
 
         if(!notificationsEnabled)
             return;

modules/UI/videolayout/SmallVideo.js

 };
 
 /**
- * Updates the Indicator for dominant speaker.
- *
- * @param isSpeaker indicates the current indicator state
+ * Shows or hides the dominant speaker indicator.
+ * @param show whether to show or hide.
  */
-SmallVideo.prototype.updateDominantSpeakerIndicator = function (isSpeaker) {
-
+SmallVideo.prototype.showDominantSpeakerIndicator = function (show) {
     if (!this.container) {
         console.warn( "Unable to set dominant speaker indicator - "
             + this.videoSpanId + " does not exist");
         return;
     }
 
-    var indicatorSpan
-        = $('#' + this.videoSpanId + '>span.dominantspeakerindicator');
-
-    // If we do not have an indicator for this video.
-    if (indicatorSpan.length <= 0) {
-        indicatorSpan = document.createElement('span');
+    var indicatorSpanId = "dominantspeakerindicator";
+    var indicatorSpan = this.getIndicatorSpan(indicatorSpanId);
 
-        indicatorSpan.innerHTML
-            = "<i id='speakerindicatoricon' class='fa fa-bullhorn'></i>";
-        indicatorSpan.className = 'dominantspeakerindicator';
+    indicatorSpan.innerHTML
+        = "<i id='indicatoricon' class='fa fa-bullhorn'></i>";
+    // adds a tooltip
+    UIUtil.setTooltip(indicatorSpan, "speaker", "left");
+    APP.translation.translateElement($(indicatorSpan));
 
-        $('#' + this.videoSpanId)[0].appendChild(indicatorSpan);
+    $(indicatorSpan).css("visibility", show ? "visible" : "hidden");
+};
 
-        // adds a tooltip
-        UIUtil.setTooltip(indicatorSpan, "speaker", "left");
-        APP.translation.translateElement($(indicatorSpan));
+/**
+ * Shows or hides the raised hand indicator.
+ * @param show whether to show or hide.
+ */
+SmallVideo.prototype.showRaisedHandIndicator = function (show) {
+    if (!this.container) {
+        console.warn( "Unable to raised hand indication - "
+            + this.videoSpanId + " does not exist");
+        return;
     }
 
-    $(indicatorSpan).css("visibility", isSpeaker ? "visible" : "hidden");
+    var indicatorSpanId = "raisehandindicator";
+    var indicatorSpan = this.getIndicatorSpan(indicatorSpanId);
+
+    indicatorSpan.style.background = "#D6D61E";
+    indicatorSpan.innerHTML
+        = "<i id='indicatoricon' class='fa fa-hand-paper-o'></i>";
+
+    // adds a tooltip
+    UIUtil.setTooltip(indicatorSpan, "raisedHand", "left");
+    APP.translation.translateElement($(indicatorSpan));
+
+    $(indicatorSpan).css("visibility", show ? "visible" : "hidden");
+};
+
+/**
+ * Gets (creating if necessary) the "indicator" span for this SmallVideo
+  identified by an ID.
+ */
+SmallVideo.prototype.getIndicatorSpan = function(id) {
+    var indicatorSpan;
+    var spans = $(`#${this.videoSpanId}>[id=${id}`);
+    if (spans.length <= 0) {
+        indicatorSpan = document.createElement('span');
+        indicatorSpan.id = id;
+        indicatorSpan.className = "indicator";
+        $('#' + this.videoSpanId)[0].appendChild(indicatorSpan);
+    } else {
+        indicatorSpan = spans[0];
+    }
+    return indicatorSpan;
 };
 
 export default SmallVideo;

modules/UI/videolayout/VideoLayout.js

         }
     },
 
+    /**
+     * Sets the "raised hand" status for a participant identified by 'id'.
+     */
+    setRaisedHandStatus(id, raisedHandStatus) {
+        var video
+            = APP.conference.isLocalId(id)
+                ? localVideoThumbnail : remoteVideos[id];
+        if (video) {
+            video.showRaisedHandIndicator(raisedHandStatus);
+        }
+    },
+
     /**
      * On dominant speaker changed event.
      */
         if (APP.conference.isLocalId(id)) {
             if(oldSpeakerRemoteVideo)
             {
-                oldSpeakerRemoteVideo.updateDominantSpeakerIndicator(false);
+                oldSpeakerRemoteVideo.showDominantSpeakerIndicator(false);
                 currentDominantSpeaker = null;
             }
-            localVideoThumbnail.updateDominantSpeakerIndicator(true);
+            localVideoThumbnail.showDominantSpeakerIndicator(true);
             return;
         }
 
         }
 
         // Update the current dominant speaker.
-        remoteVideo.updateDominantSpeakerIndicator(true);
-        localVideoThumbnail.updateDominantSpeakerIndicator(false);
+        remoteVideo.showDominantSpeakerIndicator(true);
+        localVideoThumbnail.showDominantSpeakerIndicator(false);
 
         // let's remove the indications from the remote video if any
         if (oldSpeakerRemoteVideo) {
-            oldSpeakerRemoteVideo.updateDominantSpeakerIndicator(false);
+            oldSpeakerRemoteVideo.showDominantSpeakerIndicator(false);
         }
         currentDominantSpeaker = id;
 

modules/keyboardshortcut/keyboardshortcut.js

                 APP.conference.toggleAudioMuted();
             }
         },
+        82: {
+            character: "R",
+            function: function() {
+                APP.conference.maybeToggleRaisedHand();
+            }
+
+        },
         84: {
             character: "T",
             function: function() {