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Telegram/SourceFiles/info/media/info_media_inner_widget.h

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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
+*/
+#pragma once
+
+#include "ui/rp_widget.h"
+#include "ui/widgets/scroll_area.h"
+#include "base/unique_qptr.h"
+#include "info/media/info_media_widget.h"
+#include "info/media/info_media_list_widget.h"
+
+namespace Ui {
+class VerticalLayout;
+class SearchFieldController;
+} // namespace Ui
+
+namespace Info {
+class Controller;
+} // namespace Info
+
+namespace Info::Media {
+
+class Memento;
+class ListWidget;
+class EmptyWidget;
+
+class InnerWidget final : public Ui::RpWidget {
+public:
+	InnerWidget(
+		QWidget *parent,
+		not_null<Controller*> controller);
+
+	bool showInternal(not_null<Memento*> memento);
+	void setIsStackBottom(bool isStackBottom) {
+		_isStackBottom = isStackBottom;
+		setupOtherTypes();
+	}
+
+	void saveState(not_null<Memento*> memento);
+	void restoreState(not_null<Memento*> memento);
+
+	void setScrollHeightValue(rpl::producer<int> value);
+
+	rpl::producer<Ui::ScrollToRequest> scrollToRequests() const;
+	rpl::producer<SelectedItems> selectedListValue() const;
+	void selectionAction(SelectionAction action);
+
+	~InnerWidget();
+
+protected:
+	int resizeGetHeight(int newWidth) override;
+	void visibleTopBottomUpdated(
+		int visibleTop,
+		int visibleBottom) override;
+
+private:
+	int recountHeight();
+	void refreshHeight();
+	// Allows showing additional shared media links and tabs.
+	// Used for shared media in Saved Messages.
+	void setupOtherTypes();
+	void createOtherTypes();
+	void createTypeButtons();
+
+	Type type() const;
+
+	object_ptr<ListWidget> setupList();
+
+	const not_null<Controller*> _controller;
+
+	object_ptr<Ui::VerticalLayout> _otherTypes = { nullptr };
+	object_ptr<ListWidget> _list = { nullptr };
+	object_ptr<EmptyWidget> _empty;
+
+	bool _inResize = false;
+	bool _isStackBottom = false;
+
+	rpl::event_stream<Ui::ScrollToRequest> _scrollToRequests;
+	rpl::event_stream<rpl::producer<SelectedItems>> _selectedLists;
+	rpl::event_stream<rpl::producer<int>> _listTops;
+
+};
+
+} // namespace Info::Media