Correctly check webview init success.

Also correctly init recreated webview bottom bar.

Fixes #27481, fixes #27479.

Telegram/SourceFiles/ui/chat/attach/attach_bot_webview.cpp

@@ -494,6 +494,7 @@ bool Panel::showWebview(
 		const QString &url,
 		const Webview::ThemeParams &params,
 		rpl::producer<QString> bottomText) {
+	_bottomText = std::move(bottomText);
 	if (!_webview && !createWebview(params)) {
 		return false;
 	}
@@ -503,24 +504,6 @@ bool Panel::showWebview(
 	updateThemeParams(params);
 	_webview->window.navigate(url);
 	_widget->setBackAllowed(allowBack);
-	if (bottomText) {
-		const auto &padding = st::paymentsPanelPadding;
-		const auto label = CreateChild<FlatLabel>(
-			_webviewBottom.get(),
-			std::move(bottomText),
-			st::paymentsWebviewBottom);
-		const auto height = padding.top()
-			+ label->heightNoMargins()
-			+ padding.bottom();
-		rpl::combine(
-			_webviewBottom->widthValue(),
-			label->widthValue()
-		) | rpl::start_with_next([=](int outerWidth, int width) {
-			label->move((outerWidth - width) / 2, padding.top());
-		}, label->lifetime());
-		label->show();
-		_webviewBottom->resize(_webviewBottom->width(), height);
-	}
 	_widget->setMenuAllowed([=](const Ui::Menu::MenuCallback &callback) {
 		if (_hasSettingsButton) {
 			callback(tr::lng_bot_settings(tr::now), [=] {
@@ -533,7 +516,7 @@ bool Panel::showWebview(
 			}, &st::menuIconLeave);
 		}
 		callback(tr::lng_bot_reload_page(tr::now), [=] {
-			if (_webview) {
+			if (_webview && _webview->window.widget()) {
 				_webview->window.reload();
 			} else if (const auto params = _delegate->botThemeParams()
 				; createWebview(params)) {
@@ -562,16 +545,28 @@ bool Panel::showWebview(
 	return true;
 }
 
-bool Panel::createWebview(const Webview::ThemeParams &params) {
-	auto outer = base::make_unique_q<RpWidget>(_widget.get());
-	const auto container = outer.get();
-	_widget->showInner(std::move(outer));
-	_webviewParent = container;
-
+void Panel::createWebviewBottom() {
 	_webviewBottom = std::make_unique<RpWidget>(_widget.get());
 	const auto bottom = _webviewBottom.get();
 	bottom->show();
 
+	const auto &padding = st::paymentsPanelPadding;
+	const auto label = CreateChild<FlatLabel>(
+		_webviewBottom.get(),
+		_bottomText.value(),
+		st::paymentsWebviewBottom);
+	const auto height = padding.top()
+		+ label->heightNoMargins()
+		+ padding.bottom();
+	rpl::combine(
+		_webviewBottom->widthValue(),
+		label->widthValue()
+	) | rpl::start_with_next([=](int outerWidth, int width) {
+		label->move((outerWidth - width) / 2, padding.top());
+	}, label->lifetime());
+	label->show();
+	_webviewBottom->resize(_webviewBottom->width(), height);
+
 	bottom->heightValue(
 	) | rpl::start_with_next([=](int height) {
 		const auto inner = _widget->innerGeometry();
@@ -579,11 +574,22 @@ bool Panel::createWebview(const Webview::ThemeParams &params) {
 			height = _mainButton->height();
 		}
 		bottom->move(inner.x(), inner.y() + inner.height() - height);
-		container->setFixedSize(inner.width(), inner.height() - height);
+		if (const auto container = _webviewParent.data()) {
+			container->setFixedSize(inner.width(), inner.height() - height);
+		}
 		bottom->resizeToWidth(inner.width());
 	}, bottom->lifetime());
-	container->show();
+}
 
+bool Panel::createWebview(const Webview::ThemeParams &params) {
+	auto outer = base::make_unique_q<RpWidget>(_widget.get());
+	const auto container = outer.get();
+	_widget->showInner(std::move(outer));
+	_webviewParent = container;
+
+	createWebviewBottom();
+
+	container->show();
 	_webview = std::make_unique<WebviewWithLifetime>(
 		container,
 		Webview::WindowConfig{
@@ -592,6 +598,7 @@ bool Panel::createWebview(const Webview::ThemeParams &params) {
 		});
 	const auto raw = &_webview->window;
 
+	const auto bottom = _webviewBottom.get();
 	QObject::connect(container, &QObject::destroyed, [=] {
 		if (_webview && &_webview->window == raw) {
 			base::take(_webview);

Telegram/SourceFiles/ui/chat/attach/attach_bot_webview.h

@@ -106,6 +106,7 @@ private:
 	struct WebviewWithLifetime;
 
 	bool createWebview(const Webview::ThemeParams &params);
+	void createWebviewBottom();
 	void showWebviewProgress();
 	void hideWebviewProgress();
 	void setTitle(rpl::producer<QString> title);
@@ -150,6 +151,7 @@ private:
 	std::unique_ptr<SeparatePanel> _widget;
 	std::unique_ptr<WebviewWithLifetime> _webview;
 	std::unique_ptr<RpWidget> _webviewBottom;
+	rpl::variable<QString> _bottomText;
 	QPointer<QWidget> _webviewParent;
 	std::unique_ptr<Button> _mainButton;
 	mutable crl::time _mainButtonLastClick = 0;