Added initial ability to save and restore state for boosts info.

Telegram/SourceFiles/info/boosts/info_boosts_inner_widget.cpp

@@ -9,6 +9,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 
 #include "api/api_statistics.h"
 #include "boxes/peers/edit_peer_invite_link.h"
+#include "info/boosts/info_boosts_widget.h"
 #include "info/info_controller.h"
 #include "info/statistics/info_statistics_list_controllers.h"
 #include "lang/lang_keys.h"
@@ -182,16 +183,25 @@ InnerWidget::InnerWidget(
 , _controller(controller)
 , _peer(peer)
 , _show(controller->uiShow()) {
-	const auto api = lifetime().make_state<Api::Boosts>(peer);
+}
 
-	const auto fakeShowed = lifetime().make_state<rpl::event_stream<>>();
+void InnerWidget::load() {
+	const auto api = lifetime().make_state<Api::Boosts>(_peer);
 
 	_showFinished.events(
 	) | rpl::take(1) | rpl::start_with_next([=] {
 		api->request(
 		) | rpl::start_with_error_done([](const QString &error) {
 		}, [=] {
-			const auto status = api->boostStatus();
+			_state = api->boostStatus();
+			fill();
+		}, lifetime());
+	}, lifetime());
+}
+
+void InnerWidget::fill() {
+	const auto fakeShowed = lifetime().make_state<rpl::event_stream<>>();
+	const auto &status = _state;
 	const auto inner = this;
 
 	{
@@ -240,8 +250,8 @@ InnerWidget::InnerWidget(
 		Statistics::AddBoostsList(
 			status.firstSlice,
 			inner,
-					[=](PeerPtr p) { controller->showPeerInfo(p); },
+			[=](PeerPtr p) { _controller->showPeerInfo(p); },
-					peer,
+			_peer,
 			tr::lng_boosts_title());
 		::Settings::AddSkip(inner);
 		::Settings::AddDividerText(
@@ -253,14 +263,26 @@ InnerWidget::InnerWidget(
 	::Settings::AddSkip(inner);
 	AddHeader(inner, tr::lng_boosts_link_title);
 	::Settings::AddSkip(inner, st::boostsLinkSkip);
-			FillShareLink(inner, _show, status.link, peer);
+	FillShareLink(inner, _show, status.link, _peer);
 	::Settings::AddSkip(inner);
 	::Settings::AddDividerText(inner, tr::lng_boosts_link_subtext());
 
 	resizeToWidth(width());
 	crl::on_main([=]{ fakeShowed->fire({}); });
-		}, lifetime());
+}
-	}, lifetime());
+
+void InnerWidget::saveState(not_null<Memento*> memento) {
+	memento->setState(base::take(_state));
+}
+
+void InnerWidget::restoreState(not_null<Memento*> memento) {
+	_state = memento->state();
+	if (!_state.link.isEmpty()) {
+		fill();
+	} else {
+		load();
+	}
+	Ui::RpWidget::resizeToWidth(width());
 }
 
 rpl::producer<Ui::ScrollToRequest> InnerWidget::scrollToRequests() const {

Telegram/SourceFiles/info/boosts/info_boosts_inner_widget.h

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #pragma once
 
+#include "data/data_boosts.h"
 #include "ui/widgets/scroll_area.h"
 #include "ui/wrap/vertical_layout.h"
 
@@ -39,11 +40,19 @@ public:
 
 	void showFinished();
 
+	void saveState(not_null<Memento*> memento);
+	void restoreState(not_null<Memento*> memento);
+
 private:
+	void load();
+	void fill();
+
 	not_null<Controller*> _controller;
 	not_null<PeerData*> _peer;
 	std::shared_ptr<Ui::Show> _show;
 
+	Data::BoostStatus _state;
+
 	rpl::event_stream<Ui::ScrollToRequest> _scrollToRequests;
 	rpl::event_stream<ShowRequest> _showRequests;
 	rpl::event_stream<> _showFinished;

Telegram/SourceFiles/info/boosts/info_boosts_widget.cpp

@@ -31,6 +31,14 @@ Section Memento::section() const {
 	return Section(Section::Type::Boosts);
 }
 
+void Memento::setState(SavedState state) {
+	_state = std::move(state);
+}
+
+Memento::SavedState Memento::state() {
+	return base::take(_state);
+}
+
 object_ptr<ContentWidget> Memento::createWidget(
 		QWidget *parent,
 		not_null<Controller*> controller,
@@ -75,7 +83,7 @@ void Widget::setInternalState(
 		not_null<Memento*> memento) {
 	setGeometry(geometry);
 	Ui::SendPendingMoveResizeEvents(this);
-	// restoreState(memento);
+	restoreState(memento);
 }
 
 rpl::producer<bool> Widget::desiredShadowVisibility() const {
@@ -88,10 +96,20 @@ void Widget::showFinished() {
 
 std::shared_ptr<ContentMemento> Widget::doCreateMemento() {
 	auto result = std::make_shared<Memento>(controller());
-	// saveState(result.get());
+	saveState(result.get());
 	return result;
 }
 
+void Widget::saveState(not_null<Memento*> memento) {
+	memento->setScrollTop(scrollTopSave());
+	_inner->saveState(memento);
+}
+
+void Widget::restoreState(not_null<Memento*> memento) {
+	_inner->restoreState(memento);
+	scrollTopRestore(memento->scrollTop());
+}
+
 std::shared_ptr<Info::Memento> Make(not_null<PeerData*> peer) {
 	return std::make_shared<Info::Memento>(
 		std::vector<std::shared_ptr<ContentMemento>>(

Telegram/SourceFiles/info/boosts/info_boosts_widget.h

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #pragma once
 
+#include "data/data_boosts.h"
 #include "info/info_content_widget.h"
 
 namespace Info::Boosts {
@@ -26,6 +27,14 @@ public:
 
 	Section section() const override;
 
+	using SavedState = Data::BoostStatus;
+
+	void setState(SavedState states);
+	[[nodiscard]] SavedState state();
+
+private:
+	SavedState _state;
+
 };
 
 class Widget final : public ContentWidget {