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﻿using System;
using System.Diagnostics.Contracts;
using System.Drawing;
using System.Text;
using ReClassNET.Extensions;
using ReClassNET.Memory;
using ReClassNET.Project;
using ReClassNET.UI;
namespace ReClassNET.Nodes
	public class EnumNode : BaseNode
		public override int MemorySize => (int)Enum.Size;
		public EnumDescription Enum { get; private set; } = EnumDescription.Default;
		public override void GetUserInterfaceInfo(out string name, out Image icon)
			name = "Enum";
			icon = Properties.Resources.B16x16_Button_Enum;
		public void ChangeEnum(EnumDescription @enum)
			Contract.Requires(@enum != null);
			Enum = @enum;
			GetParentContainer()?.ChildHasChanged(this);
		/// <summary>
		/// Gets the underlaying node for the enum field.
		/// </summary>
		/// <returns></returns>
		public BaseNumericNode GetUnderlayingNode()
			switch (Enum.Size)
				case EnumDescription.UnderlyingTypeSize.OneByte:
					return new UInt8Node();
				case EnumDescription.UnderlyingTypeSize.TwoBytes:
					return new UInt16Node();
				case EnumDescription.UnderlyingTypeSize.FourBytes:
					return new UInt32Node();
				case EnumDescription.UnderlyingTypeSize.EightBytes:
					return new UInt64Node();
			throw new Exception(); // TODO
		public long ReadValueFromMemory(MemoryBuffer memory)
			switch (Enum.Size)
				case EnumDescription.UnderlyingTypeSize.OneByte:
					return memory.ReadInt8(Offset);
				case EnumDescription.UnderlyingTypeSize.TwoBytes:
					return memory.ReadInt16(Offset);
				case EnumDescription.UnderlyingTypeSize.FourBytes:
					return memory.ReadInt32(Offset);
				case EnumDescription.UnderlyingTypeSize.EightBytes:
					return memory.ReadInt64(Offset);
			throw new Exception(); // TODO
		private string GetStringRepresentation(long value)
			if (!Enum.UseFlagsMode)
				var index = Enum.Values.FindIndex(kv => kv.Value == value);
				if (index == -1)
					return value.ToString();
				return Enum.Values[index].Key;
			return GetFlagsStringRepresentation(value);
		private string GetFlagsStringRepresentation(long value)
			var result = (ulong)value;
			var values = Enum.Values;
			var index = values.Count - 1;
			var retval = new StringBuilder();
			var firstTime = true;
			var saveResult = result;
			while (index >= 0)
				var temp = (ulong)values[index].Value;
				if (index == 0 && temp == 0)
					break;
				if ((result & temp) == temp)
					result -= temp;
					if (!firstTime)
						retval.Prepend(" | ");
					retval.Prepend(values[index].Key);
					firstTime = false;
				index--;
			if (result != 0)
				return value.ToString();
			if (saveResult == 0)
				if (values.Count > 0 && values[0].Value == 0)
					return values[0].Key;
				return "0";
			return retval.ToString();
		public override Size Draw(ViewInfo view, int x, int y)
			if (IsHidden && !IsWrapped)
				return DrawHidden(view, x, y);
			var origX = x;
			AddSelection(view, x, y, view.Font.Height);
			x += TextPadding;
			x = AddIcon(view, x, y, Icons.Enum, HotSpot.NoneId, HotSpotType.None);
			x = AddAddressOffset(view, x, y);
			x = AddText(view, x, y, view.Settings.TypeColor, HotSpot.NoneId, "Enum") + view.Font.Width;
			if (!IsWrapped)
				x = AddText(view, x, y, view.Settings.NameColor, HotSpot.NameId, Name) + view.Font.Width;
			x = AddText(view, x, y, view.Settings.ValueColor, HotSpot.NoneId, $"<{Enum.Name}>") + view.Font.Width;
			x = AddIcon(view, x, y, Icons.Change, 4, HotSpotType.ChangeEnumType) + view.Font.Width;
			x = AddText(view, x, y, view.Settings.TextColor, HotSpot.NoneId, "=") + view.Font.Width;
			var value = ReadValueFromMemory(view.Memory);
			x = AddText(view, x, y, view.Settings.TextColor, HotSpot.NoneId, GetStringRepresentation(value)) + view.Font.Width;
			x = AddComment(view, x, y);
			DrawInvalidMemoryIndicatorIcon(view, y);
			AddContextDropDownIcon(view, y);
			AddDeleteIcon(view, y);
			return new Size(x - origX, view.Font.Height);
		public override int CalculateDrawnHeight(ViewInfo view)
			return IsHidden && !IsWrapped ? HiddenHeight : view.Font.Height;
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