From bcdfd2150d742d4f07aa19823490fcddb792958a Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 31 May 2021 15:53:15 +0400
Subject: [PATCH] Auto-pin new screencasts.

---
 Telegram/SourceFiles/calls/group/calls_group_call.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/calls/group/calls_group_call.cpp b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
index e823dc0492..4b88c44bdd 100644
--- a/Telegram/SourceFiles/calls/group/calls_group_call.cpp
+++ b/Telegram/SourceFiles/calls/group/calls_group_call.cpp
@@ -951,10 +951,15 @@ void GroupCall::markEndpointActive(VideoEndpoint endpoint, bool active) {
 }
 
 void GroupCall::markTrackShown(const VideoEndpoint &endpoint, bool shown) {
-	if ((shown && _shownVideoTracks.emplace(endpoint).second)
-		|| (!shown && _shownVideoTracks.remove(endpoint))) {
+	const auto changed = shown
+		? _shownVideoTracks.emplace(endpoint).second
+		: _shownVideoTracks.remove(endpoint);
+	if (changed) {
 		_videoStreamShownUpdates.fire_copy({ endpoint, shown });
 	}
+	if (shown && changed && endpoint.type == VideoEndpointType::Screen) {
+		pinVideoEndpoint(endpoint);
+	}
 }
 
 void GroupCall::rejoin() {