47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
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// Source: https://gist.github.com/kleonc/a2bab51686ac6f4d7cb28aec88efa5d9
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using Godot;
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namespace Namespace
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{
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using UnderlyingType = UInt64;
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[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
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public class ExportFlagsEnumAttribute : ExportAttribute
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{
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public ExportFlagsEnumAttribute(Type enumType)
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: base(PropertyHint.Flags, GetFlagsEnumHintString(enumType))
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{ }
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private static string GetFlagsEnumHintString(Type enumType)
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{
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Dictionary<UnderlyingType, List<string>> flagNamesByFlag = new Dictionary<UnderlyingType, List<string>>();
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UnderlyingType flag = (UnderlyingType)1;
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foreach (string name in Enum.GetNames(enumType))
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{
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UnderlyingType value = (UnderlyingType)Convert.ChangeType(Enum.Parse(enumType, name), typeof(UnderlyingType));
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while (value > flag)
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{
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if (!flagNamesByFlag.ContainsKey(flag))
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{
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flagNamesByFlag.Add(flag, new List<string>());
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}
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flag <<= 1;
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}
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if (value == flag)
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{
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if (!flagNamesByFlag.TryGetValue(flag, out List<string> names))
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{
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names = new List<string>();
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flagNamesByFlag.Add(flag, names);
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}
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names.Add(name);
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}
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}
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return string.Join(", ", flagNamesByFlag.Values.Select(flagNames => string.Join(" / ", flagNames)));
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}
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}
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}
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