Hide recorder local thumbnail

css/videolayout_default.css

     margin-left: auto;
     background: rgba(0,0,0,.3);
     color: rgba(255,255,255,.5);
+}
+
+.hidden {
 }

modules/UI/recording/Recording.js

         // everyone.
         if (config.iAmRecorder) {
             VideoLayout.enableDeviceAvailabilityIcons(
-                APP.conference.localId, true);
+                APP.conference.localId, false);
+            VideoLayout.setLocalVideoVisible(false);
             Feedback.enableFeedback(false);
             Toolbar.enable(false);
             BottomToolbar.enable(false);

modules/UI/util/UIUtil.js

                 () => {selector.css({opacity: 0});}
             );
         }
+    },
+
+    /**
+     * Parses the given cssValue as an Integer. If the value is not a number
+     * we return 0 instead of NaN.
+     * @param cssValue the string value we obtain when querying css properties
+     */
+    parseCssInt(cssValue) {
+        return parseInt(cssValue) || 0;
     }
 };
 

modules/UI/videolayout/FilmStrip.js

          */
         let videoAreaAvailableWidth
             = UIUtil.getAvailableVideoWidth(isSideBarVisible)
-                - parseInt(this.filmStrip.css('right'), 10)
-                - parseInt(this.filmStrip.css('paddingLeft'), 10)
-                - parseInt(this.filmStrip.css('paddingRight'), 10)
-                - parseInt(this.filmStrip.css('borderLeftWidth'), 10)
-                - parseInt(this.filmStrip.css('borderRightWidth'), 10) - 5;
-
-        let availableWidth = Math.floor(
+                - UIUtil.parseCssInt(this.filmStrip.css('right'), 10)
+                - UIUtil.parseCssInt(this.filmStrip.css('paddingLeft'), 10)
+                - UIUtil.parseCssInt(this.filmStrip.css('paddingRight'), 10)
+                - UIUtil.parseCssInt(this.filmStrip.css('borderLeftWidth'), 10)
+                - UIUtil.parseCssInt(this.filmStrip.css('borderRightWidth'), 10)
+            - 5;
+
+        let availableWidth = videoAreaAvailableWidth;
+
+        // If the number of videos is 0 or undefined we don't need to calculate
+        // further.
+        if (numvids)
+            availableWidth = Math.floor(
                 (videoAreaAvailableWidth - numvids * (
-                parseInt(localVideoContainer.css('borderLeftWidth'), 10)
-                + parseInt(localVideoContainer.css('borderRightWidth'), 10)
-                + parseInt(localVideoContainer.css('paddingLeft'), 10)
-                + parseInt(localVideoContainer.css('paddingRight'), 10)
-                + parseInt(localVideoContainer.css('marginLeft'), 10)
-                + parseInt(localVideoContainer.css('marginRight'), 10)))
+                UIUtil.parseCssInt(
+                    localVideoContainer.css('borderLeftWidth'), 10)
+                + UIUtil.parseCssInt(
+                    localVideoContainer.css('borderRightWidth'), 10)
+                + UIUtil.parseCssInt(
+                    localVideoContainer.css('paddingLeft'), 10)
+                + UIUtil.parseCssInt(
+                    localVideoContainer.css('paddingRight'), 10)
+                + UIUtil.parseCssInt(
+                    localVideoContainer.css('marginLeft'), 10)
+                + UIUtil.parseCssInt(
+                    localVideoContainer.css('marginRight'), 10)))
                 / numvids);
 
         let maxHeight
             selector += ':visible';
         }
 
-        return this.filmStrip.children(selector);
+        // Exclude the local video container if it has been hidden.
+        if ($("#localVideoContainer").hasClass("hidden"))
+            return this.filmStrip.children(selector)
+                    .not("#localVideoContainer");
+        else
+            return this.filmStrip.children(selector);
     }
 };
 

modules/UI/videolayout/LocalVideo.js

-/* global $, interfaceConfig, APP, JitsiMeetJS */
+/* global $, config, interfaceConfig, APP, JitsiMeetJS */
 import ConnectionIndicator from "./ConnectionIndicator";
 import UIUtil from "../util/UIUtil";
 import UIEvents from "../../../service/UI/UIEvents";
     stream.on(TrackEvents.LOCAL_TRACK_STOPPED, endedHandler);
 };
 
+/**
+ * Shows or hides the local video container.
+ * @param {boolean} true to make the local video container visible, false
+ * otherwise
+ */
+LocalVideo.prototype.setVisible = function(visible) {
+
+    // We toggle the hidden class as an indication to other interested parties
+    // that this container has been hidden on purpose.
+    $("#localVideoContainer").toggleClass("hidden");
+
+    // We still show/hide it as we need to overwrite the style property if we
+    // want our action to take effect. Toggling the display property through
+    // the above css class didn't succeed in overwriting the style.
+    if (visible) {
+        $("#localVideoContainer").show();
+    }
+    else {
+        $("#localVideoContainer").hide();
+    }
+};
+
 export default LocalVideo;

modules/UI/videolayout/VideoLayout.js

             video.enableDeviceAvailabilityIcons(enable);
     },
 
+    /**
+     * Shows/hides local video.
+     * @param {boolean} true to make the local video visible, false - otherwise
+     */
+    setLocalVideoVisible(visible) {
+        localVideoThumbnail.setVisible(visible);
+    },
+
     /**
      * Checks if removed video is currently displayed and tries to display
      * another one instead.