using System;
using System.Collections;
using System.Runtime.InteropServices;

namespace System.Globalization
{
	/// <summary>Enumerates the text elements of a string. </summary>
	// Token: 0x02000199 RID: 409
	[ComVisible(true)]
	[Serializable]
	public class TextElementEnumerator : IEnumerator
	{
		// Token: 0x060014D0 RID: 5328 RVA: 0x0004FF5C File Offset: 0x0004E15C
		internal TextElementEnumerator(string str, int startpos)
		{
			this.index = -1;
			this.startpos = startpos;
			this.str = str.Substring(startpos);
			this.element = null;
		}

		/// <summary>Gets the current text element in the string.</summary>
		/// <returns>An object containing the current text element in the string.</returns>
		/// <exception cref="T:System.InvalidOperationException">The enumerator is positioned before the first text element of the string or after the last text element. </exception>
		// Token: 0x170003AF RID: 943
		// (get) Token: 0x060014D1 RID: 5329 RVA: 0x0004FF94 File Offset: 0x0004E194
		public object Current
		{
			get
			{
				if (this.element == null)
				{
					throw new InvalidOperationException();
				}
				return this.element;
			}
		}

		/// <summary>Gets the index of the text element that the enumerator is currently positioned over.</summary>
		/// <returns>The index of the text element that the enumerator is currently positioned over.</returns>
		/// <exception cref="T:System.InvalidOperationException">The enumerator is positioned before the first text element of the string or after the last text element. </exception>
		// Token: 0x170003B0 RID: 944
		// (get) Token: 0x060014D2 RID: 5330 RVA: 0x0004FFB0 File Offset: 0x0004E1B0
		public int ElementIndex
		{
			get
			{
				if (this.element == null)
				{
					throw new InvalidOperationException();
				}
				return this.elementindex + this.startpos;
			}
		}

		/// <summary>Gets the current text element in the string.</summary>
		/// <returns>A new string containing the current text element in the string being read.</returns>
		/// <exception cref="T:System.InvalidOperationException">The enumerator is positioned before the first text element of the string or after the last text element. </exception>
		// Token: 0x060014D3 RID: 5331 RVA: 0x0004FFD0 File Offset: 0x0004E1D0
		public string GetTextElement()
		{
			if (this.element == null)
			{
				throw new InvalidOperationException();
			}
			return this.element;
		}

		/// <summary>Advances the enumerator to the next text element of the string.</summary>
		/// <returns>true if the enumerator was successfully advanced to the next text element; false if the enumerator has passed the end of the string.</returns>
		// Token: 0x060014D4 RID: 5332 RVA: 0x0004FFEC File Offset: 0x0004E1EC
		public bool MoveNext()
		{
			this.elementindex = this.index + 1;
			if (this.elementindex < this.str.Length)
			{
				this.element = StringInfo.GetNextTextElement(this.str, this.elementindex);
				this.index += this.element.Length;
				return true;
			}
			this.element = null;
			return false;
		}

		/// <summary>Sets the enumerator to its initial position, which is before the first text element in the string.</summary>
		// Token: 0x060014D5 RID: 5333 RVA: 0x00050058 File Offset: 0x0004E258
		public void Reset()
		{
			this.element = null;
			this.index = -1;
		}

		// Token: 0x040005E1 RID: 1505
		private int index;

		// Token: 0x040005E2 RID: 1506
		private int elementindex;

		// Token: 0x040005E3 RID: 1507
		private int startpos;

		// Token: 0x040005E4 RID: 1508
		private string str;

		// Token: 0x040005E5 RID: 1509
		private string element;
	}
}