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Telegram/SourceFiles/dialogs/ui/dialogs_topics_view.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
+
+class Painter;
+
+namespace style {
+struct DialogRow;
+} // namespace style
+
+namespace Data {
+class Forum;
+class ForumTopic;
+class SavedMessages;
+class SavedSublist;
+} // namespace Data
+
+namespace Ui {
+class RippleAnimation;
+} // namespace Ui
+
+namespace Dialogs::Ui {
+
+using namespace ::Ui;
+
+struct PaintContext;
+struct TopicJumpCache;
+struct TopicJumpCorners;
+
+struct JumpToLastBg {
+	not_null<const style::DialogRow*> st;
+	not_null<TopicJumpCorners*> corners;
+	QRect geometry;
+	const style::color &bg;
+	int width1 = 0;
+	int width2 = 0;
+};
+struct JumpToLastGeometry {
+	int rightCut = 0;
+	QRect area1;
+	QRect area2;
+
+	friend inline bool operator==(
+		const JumpToLastGeometry&,
+		const JumpToLastGeometry&) = default;
+};
+JumpToLastGeometry FillJumpToLastBg(QPainter &p, JumpToLastBg context);
+
+struct JumpToLastPrepared {
+	not_null<const style::DialogRow*> st;
+	not_null<TopicJumpCorners*> corners;
+	const style::color &bg;
+	const JumpToLastGeometry &prepared;
+};
+void FillJumpToLastPrepared(QPainter &p, JumpToLastPrepared context);
+
+class TopicsView final {
+public:
+	TopicsView(Data::Forum *forum, Data::SavedMessages *monoforum);
+	~TopicsView();
+
+	[[nodiscard]] Data::Forum *forum() const {
+		return _forum;
+	}
+	[[nodiscard]] Data::SavedMessages *monoforum() const {
+		return _monoforum;
+	}
+
+	[[nodiscard]] bool prepared() const;
+	void prepare(MsgId frontRootId, Fn<void()> customEmojiRepaint);
+	void prepare(PeerId frontPeerId, Fn<void()> customEmojiRepaint);
+
+	[[nodiscard]] int jumpToTopicWidth() const;
+
+	void paint(
+		Painter &p,
+		const QRect &geometry,
+		const PaintContext &context) const;
+
+	bool changeTopicJumpGeometry(JumpToLastGeometry geometry);
+	void clearTopicJumpGeometry();
+	[[nodiscard]] bool isInTopicJumpArea(int x, int y) const;
+	void addTopicJumpRipple(
+		QPoint origin,
+		not_null<TopicJumpCache*> topicJumpCache,
+		Fn<void()> updateCallback);
+	void paintRipple(
+		QPainter &p,
+		int x,
+		int y,
+		int outerWidth,
+		const QColor *colorOverride) const;
+	void stopLastRipple();
+	void clearRipple();
+
+	[[nodiscard]] rpl::lifetime &lifetime() {
+		return _lifetime;
+	}
+
+private:
+	struct Title {
+		Text::String title;
+		uint64 key = 0;
+		int version = -1;
+		bool unread = false;
+	};
+
+	[[nodiscard]] QImage topicJumpRippleMask(
+		not_null<TopicJumpCache*> topicJumpCache) const;
+
+	Data::Forum * const _forum = nullptr;
+	Data::SavedMessages * const _monoforum = nullptr;
+
+	mutable std::vector<Title> _titles;
+	mutable std::unique_ptr<RippleAnimation> _ripple;
+	JumpToLastGeometry _lastTopicJumpGeometry;
+	int _version = -1;
+	bool _jumpToTopic = false;
+	bool _allLoaded = false;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Dialogs::Ui