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Telegram/SourceFiles/dialogs/dialogs_indexed_list.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 "dialogs/dialogs_list.h"
+
+class History;
+
+namespace Dialogs {
+
+struct RowsByLetter;
+class Row;
+
+class IndexedList {
+public:
+	IndexedList(SortMode sortMode, FilterId filterId = 0);
+
+	RowsByLetter addToEnd(Key key);
+	Row *addByName(Key key);
+	void adjustByDate(const RowsByLetter &links);
+	void moveToTop(Key key);
+	bool updateHeight(Key key, float64 narrowRatio);
+	bool updateHeights(float64 narrowRatio);
+
+	// row must belong to this indexed list all().
+	void movePinned(Row *row, int deltaSign);
+
+	// For sortMode != SortMode::Date && != Complex
+	void peerNameChanged(
+		not_null<PeerData*> peer,
+		const base::flat_set<QChar> &oldChars);
+
+	//For sortMode == SortMode::Date || == Complex
+	void peerNameChanged(
+		FilterId filterId,
+		not_null<PeerData*> peer,
+		const base::flat_set<QChar> &oldChars);
+
+	void remove(Key key, Row *replacedBy = nullptr);
+	void clear();
+
+	[[nodiscard]] const List &all() const {
+		return _list;
+	}
+	[[nodiscard]] const List *filtered(QChar ch) const {
+		const auto i = _index.find(ch);
+		return (i != _index.end()) ? &i->second : nullptr;
+	}
+	[[nodiscard]] std::vector<not_null<Row*>> filtered(
+		const QStringList &words) const;
+
+	// Part of List interface is duplicated here for all() list.
+	[[nodiscard]] int size() const { return all().size(); }
+	[[nodiscard]] bool empty() const { return all().empty(); }
+	[[nodiscard]] int height() const { return all().height(); }
+	[[nodiscard]] bool contains(Key key) const {
+		return all().contains(key);
+	}
+	[[nodiscard]] Row *getRow(Key key) const { return all().getRow(key); }
+	[[nodiscard]] Row *rowAtY(int y) const { return all().rowAtY(y); }
+
+	using iterator = List::iterator;
+	using const_iterator = List::const_iterator;
+	[[nodiscard]] const_iterator cbegin() const { return all().cbegin(); }
+	[[nodiscard]] const_iterator cend() const { return all().cend(); }
+	[[nodiscard]] const_iterator begin() const { return all().cbegin(); }
+	[[nodiscard]] const_iterator end() const { return all().cend(); }
+	[[nodiscard]] iterator begin() { return all().begin(); }
+	[[nodiscard]] iterator end() { return all().end(); }
+	[[nodiscard]] const_iterator cfind(Row *value) const {
+		return all().cfind(value);
+	}
+	[[nodiscard]] const_iterator find(Row *value) const {
+		return all().cfind(value);
+	}
+	[[nodiscard]] iterator find(Row *value) { return all().find(value); }
+	[[nodiscard]] const_iterator findByY(int y) const {
+		return all().findByY(y);
+	}
+	[[nodiscard]] iterator findByY(int y) { return all().findByY(y); }
+
+private:
+	void adjustByName(
+		Key key,
+		const base::flat_set<QChar> &oldChars);
+	void adjustNames(
+		FilterId filterId,
+		not_null<History*> history,
+		const base::flat_set<QChar> &oldChars);
+
+	SortMode _sortMode = SortMode();
+	FilterId _filterId = 0;
+	List _list, _empty;
+	base::flat_map<QChar, List> _index;
+
+};
+
+} // namespace Dialogs