MixedCodeDocumentFragment.cs

// HtmlAgilityPack V1.0 - Simon Mourier <simon underscore mourier at hotmail dot com>
namespace HtmlAgilityPack
{
	/// <summary>
	/// Represents a base class for fragments in a mixed code document.
	/// </summary>
	public abstract class MixedCodeDocumentFragment
	{
		#region Fields

		internal MixedCodeDocument Doc;
		private string _fragmentText;
		internal int Index;
		internal int Length;
		private int _line;
		internal int _lineposition;
		internal MixedCodeDocumentFragmentType _type;

		#endregion

		#region Constructors

		internal MixedCodeDocumentFragment(MixedCodeDocument doc, MixedCodeDocumentFragmentType type)
		{
			Doc = doc;
			_type = type;
			switch (type)
			{
				case MixedCodeDocumentFragmentType.Text:
					Doc._textfragments.Append(this);
					break;

				case MixedCodeDocumentFragmentType.Code:
					Doc._codefragments.Append(this);
					break;
			}
			Doc._fragments.Append(this);
		}

		#endregion

		#region Properties

		/// <summary>
		/// Gets the fragement text.
		/// </summary>
		public string FragmentText
		{
			get
			{
				if (_fragmentText == null)
				{
					_fragmentText = Doc._text.Substring(Index, Length);
				}
				return FragmentText;
			}
			internal set { _fragmentText = value; }
		}

		/// <summary>
		/// Gets the type of fragment.
		/// </summary>
		public MixedCodeDocumentFragmentType FragmentType
		{
			get { return _type; }
		}

		/// <summary>
		/// Gets the line number of the fragment.
		/// </summary>
		public int Line
		{
			get { return _line; }
			internal set { _line = value; }
		}

		/// <summary>
		/// Gets the line position (column) of the fragment.
		/// </summary>
		public int LinePosition
		{
			get { return _lineposition; }
		}

		/// <summary>
		/// Gets the fragment position in the document's stream.
		/// </summary>
		public int StreamPosition
		{
			get { return Index; }
		}

		#endregion
	}
}