perf: skip update from GIF timer if no animated elements are shown (#5042)

src/messages/layouts/MessageLayout.cpp

@@ -196,8 +196,10 @@ void MessageLayout::actuallyLayout(int width, MessageElementFlags flags)
 }
 
 // Painting
-void MessageLayout::paint(const MessagePaintContext &ctx)
+MessagePaintResult MessageLayout::paint(const MessagePaintContext &ctx)
 {
+    MessagePaintResult result;
+
     QPixmap *pixmap = this->ensureBuffer(ctx.painter, ctx.canvasWidth);
 
     if (!this->bufferValid_)
@@ -209,7 +211,8 @@ void MessageLayout::paint(const MessagePaintContext &ctx)
     ctx.painter.drawPixmap(0, ctx.y, *pixmap);
 
     // draw gif emotes
-    this->container_.paintAnimatedElements(ctx.painter, ctx.y);
+    result.hasAnimatedElements =
+        this->container_.paintAnimatedElements(ctx.painter, ctx.y);
 
     // draw disabled
     if (this->message_->flags.has(MessageFlag::Disabled))
@@ -270,6 +273,8 @@ void MessageLayout::paint(const MessagePaintContext &ctx)
     }
 
     this->bufferValid_ = true;
+
+    return result;
 }
 
 QPixmap *MessageLayout::ensureBuffer(QPainter &painter, int width)