From 7d0cd00a509c42e35d0c44e4c37c5322d0eaf325 Mon Sep 17 00:00:00 2001
From: damencho <damencho@jitsi.org>
Date: Fri, 25 Mar 2016 19:38:56 -0500
Subject: [PATCH 1/2] Enables shared video for all participants, the first to
 share is the video all will see, later attempts will result just a dialog
 informing that video is already shared.

---
 conference.js                          | 10 ----------
 lang/main.json                         |  1 +
 modules/UI/shared_video/SharedVideo.js | 11 +++++++++--
 modules/UI/toolbars/Toolbar.js         |  5 +++--
 4 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/conference.js b/conference.js
index d48388422..e71db8db5 100644
--- a/conference.js
+++ b/conference.js
@@ -1114,16 +1114,6 @@ export default {
         room.addCommandListener(
             Commands.SHARED_VIDEO, ({value, attributes}, id) => {
 
-                // if we are not the moderator or
-                // the command is coming from a user which is not the moderator
-                if (!(this.isLocalId(id) && room.isModerator())
-                    && !this.isParticipantModerator(id))
-                {
-                    console.warn('Received shared video command ' +
-                        'not from moderator');
-                    return;
-                }
-
                 if (attributes.state === 'stop') {
                     APP.UI.stopSharedVideo(id, attributes);
                 } else if (attributes.state === 'start') {
diff --git a/lang/main.json b/lang/main.json
index f03c1bbc3..24199d190 100644
--- a/lang/main.json
+++ b/lang/main.json
@@ -166,6 +166,7 @@
         "shareVideoLinkError": "Please provide a correct youtube link.",
         "removeSharedVideoTitle": "Remove shared video",
         "removeSharedVideoMsg": "Are you sure you would like to remove your shared video?",
+        "alreadySharedVideoMsg": "Another participant is already sharing video. This conference allows only one shared video at a time.",
         "WaitingForHost": "Waiting for the host ...",
         "WaitForHostMsg": "The conference <b>__room__ </b> has not yet started. If you are the host then please authenticate. Otherwise, please wait for the host to arrive.",
         "IamHost": "I am the host",
diff --git a/modules/UI/shared_video/SharedVideo.js b/modules/UI/shared_video/SharedVideo.js
index f769a1f59..75899715d 100644
--- a/modules/UI/shared_video/SharedVideo.js
+++ b/modules/UI/shared_video/SharedVideo.js
@@ -43,8 +43,15 @@ export default class SharedVideoManager {
             return;
         }
 
-        showStopVideoPropmpt().then(() =>
-            this.emitter.emit(UIEvents.UPDATE_SHARED_VIDEO, null, 'stop'));
+        if(APP.conference.isLocalId(this.from)) {
+            showStopVideoPropmpt().then(() =>
+                this.emitter.emit(UIEvents.UPDATE_SHARED_VIDEO, null, 'stop'));
+        } else {
+            messageHandler.openMessageDialog(
+                "dialog.shareVideoTitle",
+                "dialog.alreadySharedVideoMsg"
+            );
+        }
     }
 
     /**
diff --git a/modules/UI/toolbars/Toolbar.js b/modules/UI/toolbars/Toolbar.js
index 890b13bb2..687e91783 100644
--- a/modules/UI/toolbars/Toolbar.js
+++ b/modules/UI/toolbars/Toolbar.js
@@ -289,8 +289,9 @@ const Toolbar = {
     },
 
     // Shows or hides the 'shared video' button.
-    showSharedVideoButton (show) {
-        if (UIUtil.isButtonEnabled('sharedvideo') && show) {
+    showSharedVideoButton () {
+        if (UIUtil.isButtonEnabled('sharedvideo')
+                && config.disableThirdPartyRequests !== true) {
             $('#toolbar_button_sharedvideo').css({display: "inline-block"});
         } else {
             $('#toolbar_button_sharedvideo').css({display: "none"});

From 885210452cbfae614dbc2930594a68be7f9a94f8 Mon Sep 17 00:00:00 2001
From: damencho <damencho@jitsi.org>
Date: Mon, 28 Mar 2016 11:46:45 -0500
Subject: [PATCH 2/2] Updates button states on non moderator participants
 before showing the toolbar.

---
 modules/UI/UI.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/UI/UI.js b/modules/UI/UI.js
index c0fad8f89..1202a429e 100644
--- a/modules/UI/UI.js
+++ b/modules/UI/UI.js
@@ -233,6 +233,10 @@ UI.initConference = function () {
     // Add myself to the contact list.
     ContactList.addContact(id);
 
+    //update default button states before showing the toolbar
+    //if local role changes buttons state will be again updated
+    UI.updateLocalRole(false);
+
     // Once we've joined the muc show the toolbar
     ToolbarToggler.showToolbar();