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Telegram/SourceFiles/layout/layout_position.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 "layout/layout_position.h"
+
+namespace Layout {
+namespace {
+
+constexpr auto kMatrixRowShift = 40000;
+
+} // namespace
+
+Layout::Position IndexToPosition(int index) {
+	return {
+		(index >= 0) ? (index / kMatrixRowShift) : -1,
+		(index >= 0) ? (index % kMatrixRowShift) : -1 };
+}
+
+int PositionToIndex(int row, int column) {
+	return row * kMatrixRowShift + column;
+}
+
+int PositionToIndex(const Layout::Position &position) {
+	return PositionToIndex(position.row, position.column);
+}
+
+} // namespace Layout