From ff1d5fce29cbd85605e5de0125318be33b2eb9bb Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Tue, 30 May 2023 17:36:11 +0400
Subject: [PATCH] Allow tracking isLayerShown in LayerManager.

---
 ui/layers/layer_manager.cpp | 4 ++++
 ui/layers/layer_manager.h   | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/ui/layers/layer_manager.cpp b/ui/layers/layer_manager.cpp
index 7a22e09..a6470ac 100644
--- a/ui/layers/layer_manager.cpp
+++ b/ui/layers/layer_manager.cpp
@@ -168,6 +168,8 @@ void LayerManager::ensureLayerCreated() {
 	) | rpl::start_with_next([=](QSize size) {
 		_layer->resize(size);
 	}, _layer->lifetime());
+
+	_layerShown = true;
 }
 
 void LayerManager::destroyLayer() {
@@ -176,6 +178,8 @@ void LayerManager::destroyLayer() {
 	}
 
 	auto layer = base::take(_layer);
+	_layerShown = false;
+
 	const auto resetFocus = Ui::InFocusChain(layer);
 	if (resetFocus) {
 		_widget->setFocus();
diff --git a/ui/layers/layer_manager.h b/ui/layers/layer_manager.h
index a051a11..b8ce72b 100644
--- a/ui/layers/layer_manager.h
+++ b/ui/layers/layer_manager.h
@@ -42,6 +42,10 @@ public:
 	void raise();
 	bool setFocus();
 
+	[[nodiscard]] rpl::producer<bool> layerShownValue() const {
+		return _layerShown.value();
+	}
+
 	[[nodiscard]] not_null<Ui::RpWidget*> toastParent() const {
 		return _widget;
 	}
@@ -58,6 +62,7 @@ private:
 	const not_null<RpWidget*> _widget;
 	base::unique_qptr<LayerStackWidget> _layer;
 	std::shared_ptr<ManagerShow> _cachedShow;
+	rpl::variable<bool> _layerShown;
 
 	const style::Box *_boxSt = nullptr;
 	const style::Box *_layerSt = nullptr;