From 2eab7044baa63bb9e3f65cdc846c8aad6ca2bf61 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Sat, 12 Apr 2025 10:20:08 +0300
Subject: [PATCH] Added ability to emplace top bar suggestion later.

---
 .../SourceFiles/dialogs/dialogs_widget.cpp    | 71 +++++++++++--------
 Telegram/SourceFiles/dialogs/dialogs_widget.h |  2 +
 2 files changed, 43 insertions(+), 30 deletions(-)

diff --git a/Telegram/SourceFiles/dialogs/dialogs_widget.cpp b/Telegram/SourceFiles/dialogs/dialogs_widget.cpp
index dd3934622a..6ee40e1a69 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_widget.cpp
+++ b/Telegram/SourceFiles/dialogs/dialogs_widget.cpp
@@ -379,36 +379,6 @@ Widget::Widget(
 		OverscrollType::Real);
 	const auto innerList = _scroll->setOwnedWidget(
 		object_ptr<Ui::VerticalLayout>(this));
-	if (_layout != Layout::Child) {
-		TopBarSuggestionValue(
-			innerList,
-			&session()
-		) | rpl::start_with_next([=](Ui::SlideWrap<Ui::RpWidget> *raw) {
-			if (raw) {
-				_topBarSuggestion = innerList->insert(
-					0,
-					object_ptr<Ui::SlideWrap<Ui::RpWidget>>::fromRaw(raw));
-				rpl::combine(
-					_topBarSuggestion->entity()->desiredHeightValue(),
-					_childListShown.value()
-				) | rpl::start_with_next([=](
-						int desiredHeight,
-						float64 shown) {
-					const auto newHeight = desiredHeight * (1. - shown);
-					_topBarSuggestion->entity()->setMaximumHeight(newHeight);
-					_topBarSuggestion->entity()->setMinimumWidth((shown > 0)
-						? width()
-						: 0);
-					_topBarSuggestion->entity()->resize(width(), newHeight);
-				}, _topBarSuggestion->lifetime());
-			} else {
-				if (_topBarSuggestion) {
-					delete _topBarSuggestion;
-				}
-				_topBarSuggestion = nullptr;
-			}
-		}, lifetime());
-	}
 	_inner = innerList->add(object_ptr<InnerWidget>(
 		innerList,
 		controller,
@@ -725,6 +695,7 @@ Widget::Widget(
 	}
 
 	setupFrozenAccountBar();
+	setupTopBarSuggestions(innerList);
 }
 
 void Widget::setupSwipeBack() {
@@ -1047,6 +1018,46 @@ void Widget::setupFrozenAccountBar() {
 	}, lifetime());
 }
 
+void Widget::setupTopBarSuggestions(not_null<Ui::VerticalLayout*> dialogs) {
+	if (_layout == Layout::Child) {
+		return;
+	}
+	using namespace rpl::mappers;
+	crl::on_main(&session(), [=, session = &session()] {
+		(session->data().chatsListLoaded(nullptr)
+			? rpl::single<Data::Folder*>(nullptr)
+			: session->data().chatsListLoadedEvents()
+		) | rpl::filter(_1 == nullptr) | rpl::map([=] {
+			return TopBarSuggestionValue(dialogs, session);
+		}) | rpl::flatten_latest() | rpl::start_with_next([=](
+				Ui::SlideWrap<Ui::RpWidget> *raw) {
+			if (raw) {
+				_topBarSuggestion = dialogs->insert(
+					0,
+					object_ptr<Ui::SlideWrap<Ui::RpWidget>>::fromRaw(raw));
+				rpl::combine(
+					_topBarSuggestion->entity()->desiredHeightValue(),
+					_childListShown.value()
+				) | rpl::start_with_next([=](
+						int desiredHeight,
+						float64 shown) {
+					const auto newHeight = desiredHeight * (1. - shown);
+					_topBarSuggestion->entity()->setMaximumHeight(newHeight);
+					_topBarSuggestion->entity()->setMinimumWidth((shown > 0)
+						? width()
+						: 0);
+					_topBarSuggestion->entity()->resize(width(), newHeight);
+				}, _topBarSuggestion->lifetime());
+			} else {
+				if (_topBarSuggestion) {
+					delete _topBarSuggestion;
+				}
+				_topBarSuggestion = nullptr;
+			}
+		}, lifetime());
+	});
+}
+
 void Widget::updateFrozenAccountBar() {
 	if (_layout == Layout::Child
 		|| _openedForum
diff --git a/Telegram/SourceFiles/dialogs/dialogs_widget.h b/Telegram/SourceFiles/dialogs/dialogs_widget.h
index 2a6e8d4aca..fb502850fc 100644
--- a/Telegram/SourceFiles/dialogs/dialogs_widget.h
+++ b/Telegram/SourceFiles/dialogs/dialogs_widget.h
@@ -55,6 +55,7 @@ template <typename Widget>
 class FadeWrapScaled;
 template <typename Widget>
 class SlideWrap;
+class VerticalLayout;
 } // namespace Ui
 
 namespace Window {
@@ -210,6 +211,7 @@ private:
 	void setupShortcuts();
 	void setupStories();
 	void setupSwipeBack();
+	void setupTopBarSuggestions(not_null<Ui::VerticalLayout*> dialogs);
 	void storiesExplicitCollapse();
 	void collectStoriesUserpicsViews(Data::StorySourcesList list);
 	void storiesToggleExplicitExpand(bool expand);