init

Telegram/SourceFiles/info/members/info_members_widget.cpp

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "info/members/info_members_widget.h"
+
+#include "info/profile/info_profile_members.h"
+#include "info/info_controller.h"
+#include "ui/widgets/scroll_area.h"
+#include "ui/ui_utility.h"
+#include "data/data_peer.h"
+#include "data/data_channel.h"
+#include "lang/lang_keys.h"
+#include "styles/style_info.h"
+
+namespace Info {
+namespace Members {
+
+Memento::Memento(not_null<Controller*> controller)
+: Memento(
+	controller->peer(),
+	controller->migratedPeerId()) {
+}
+
+Memento::Memento(not_null<PeerData*> peer, PeerId migratedPeerId)
+: ContentMemento(peer, nullptr, nullptr, migratedPeerId) {
+}
+
+Section Memento::section() const {
+	return Section(Section::Type::Members);
+}
+
+object_ptr<ContentWidget> Memento::createWidget(
+		QWidget *parent,
+		not_null<Controller*> controller,
+		const QRect &geometry) {
+	auto result = object_ptr<Widget>(
+		parent,
+		controller);
+	result->setInternalState(geometry, this);
+	return result;
+}
+
+void Memento::setState(std::unique_ptr<SavedState> state) {
+	_state = std::move(state);
+}
+
+std::unique_ptr<SavedState> Memento::state() {
+	return std::move(_state);
+}
+
+Memento::~Memento() = default;
+
+Widget::Widget(
+	QWidget *parent,
+	not_null<Controller*> controller)
+: ContentWidget(parent, controller) {
+	_inner = setInnerWidget(object_ptr<Profile::Members>(
+		this,
+		controller));
+}
+
+bool Widget::showInternal(not_null<ContentMemento*> memento) {
+	if (!controller()->validateMementoPeer(memento)) {
+		return false;
+	}
+	if (auto membersMemento = dynamic_cast<Memento*>(memento.get())) {
+		restoreState(membersMemento);
+		return true;
+	}
+	return false;
+}
+
+void Widget::setInternalState(
+		const QRect &geometry,
+		not_null<Memento*> memento) {
+	setGeometry(geometry);
+	Ui::SendPendingMoveResizeEvents(this);
+	restoreState(memento);
+}
+
+rpl::producer<QString> Widget::title() {
+	if (const auto channel = controller()->key().peer()->asChannel()) {
+		return channel->isMegagroup()
+			? tr::lng_profile_participants_section()
+			: tr::lng_profile_subscribers_section();
+	}
+	return tr::lng_profile_participants_section();
+}
+
+std::shared_ptr<ContentMemento> Widget::doCreateMemento() {
+	auto result = std::make_shared<Memento>(controller());
+	saveState(result.get());
+	return result;
+}
+
+void Widget::saveState(not_null<Memento*> memento) {
+	memento->setScrollTop(scrollTopSave());
+	memento->setState(_inner->saveState());
+}
+
+void Widget::restoreState(not_null<Memento*> memento) {
+	_inner->restoreState(memento->state());
+	scrollTopRestore(memento->scrollTop());
+}
+
+} // namespace Members
+} // namespace Info