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Telegram/lib_ui/ui/rect_part.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "base/flags.h"
+
+enum class RectPart {
+	None = 0,
+
+	TopLeft = (1 << 0),
+	Top = (1 << 1),
+	TopRight = (1 << 2),
+	Left = (1 << 3),
+	Center = (1 << 4),
+	Right = (1 << 5),
+	BottomLeft = (1 << 6),
+	Bottom = (1 << 7),
+	BottomRight = (1 << 8),
+
+	FullTop = TopLeft | Top | TopRight,
+	NoTopBottom = Left | Center | Right,
+	FullBottom = BottomLeft | Bottom | BottomRight,
+	NoTop = NoTopBottom | FullBottom,
+	NoBottom = FullTop | NoTopBottom,
+
+	FullLeft = TopLeft | Left | BottomLeft,
+	NoLeftRight = Top | Center | Bottom,
+	FullRight = TopRight | Right | BottomRight,
+	NoLeft = NoLeftRight | FullRight,
+	NoRight = FullLeft | NoLeftRight,
+
+	AllCorners = TopLeft | TopRight | BottomLeft | BottomRight,
+	AllSides = Top | Bottom | Left | Right,
+
+	Full = FullTop | NoTop,
+};
+using RectParts = base::flags<RectPart>;
+inline constexpr auto is_flag_type(RectPart) { return true; };
+
+inline bool IsTopCorner(RectPart corner) {
+	return (corner == RectPart::TopLeft) || (corner == RectPart::TopRight);
+}
+
+inline bool IsBottomCorner(RectPart corner) {
+	return (corner == RectPart::BottomLeft) || (corner == RectPart::BottomRight);
+}
+
+inline bool IsLeftCorner(RectPart corner) {
+	return (corner == RectPart::TopLeft) || (corner == RectPart::BottomLeft);
+}
+
+inline bool IsRightCorner(RectPart corner) {
+	return (corner == RectPart::TopRight) || (corner == RectPart::BottomRight);
+}