using System;
using System.Collections.Generic;

namespace UnityEngine.Experimental.UIElements
{
	// Token: 0x0200033B RID: 827
	internal class Recycler
	{
		// Token: 0x06003372 RID: 13170 RVA: 0x000506F4 File Offset: 0x0004E8F4
		public void Trash(IRecyclable recyclable)
		{
			if (recyclable.isTrashed)
			{
				throw new ArgumentException("Trying to add an element to the Recycler more than once");
			}
			Type type = recyclable.GetType();
			Stack<IRecyclable> stack;
			if (!this.m_ReusableStacks.TryGetValue(type, out stack))
			{
				stack = new Stack<IRecyclable>();
				this.m_ReusableStacks.Add(type, stack);
			}
			recyclable.isTrashed = true;
			recyclable.OnTrash();
			if (stack.Count < 500)
			{
				stack.Push(recyclable);
			}
		}

		// Token: 0x06003373 RID: 13171 RVA: 0x0005076C File Offset: 0x0004E96C
		public void Clear()
		{
			this.m_ReusableStacks.Clear();
		}

		// Token: 0x17000BB2 RID: 2994
		// (get) Token: 0x06003374 RID: 13172 RVA: 0x0005077C File Offset: 0x0004E97C
		public int Count
		{
			get
			{
				int num = 0;
				foreach (KeyValuePair<Type, Stack<IRecyclable>> keyValuePair in this.m_ReusableStacks)
				{
					num += keyValuePair.Value.Count;
				}
				return num;
			}
		}

		// Token: 0x06003375 RID: 13173 RVA: 0x000507CC File Offset: 0x0004E9CC
		public TType TryReuse<TType>() where TType : IRecyclable
		{
			Type typeFromHandle = typeof(TType);
			TType ttype = default(TType);
			Stack<IRecyclable> stack;
			if (this.m_ReusableStacks.TryGetValue(typeFromHandle, out stack))
			{
				if (stack.Count > 0)
				{
					ttype = (TType)((object)stack.Pop());
					ttype.isTrashed = false;
					ttype.OnReuse();
				}
			}
			return ttype;
		}

		// Token: 0x04000A97 RID: 2711
		public const int MaxInstancesPerType = 500;

		// Token: 0x04000A98 RID: 2712
		private Dictionary<Type, Stack<IRecyclable>> m_ReusableStacks = new Dictionary<Type, Stack<IRecyclable>>();
	}
}