c:\Tools\SD3\src\Libraries\ICSharpCode.TextEditor\Project\Src\Document\HighlightingStrategy\SyntaxModes\FileSyntaxModeProvider.cs

// <file>

//     <copyright see="prj:///doc/copyright.txt"/>

//     <license see="prj:///doc/license.txt"/>

//     <owner name="Mike Krüger" email="mike@icsharpcode.net"/>

//     <version>$Revision: 2533 $</version>

// </file>

using System;

using System.Collections.Generic;

using System.IO;

using System.Windows.Forms;

using System.Xml;

namespace ICSharpCode.TextEditor.Document

{

	public class FileSyntaxModeProvider : ISyntaxModeFileProvider

	{

		string    directory;

		List<SyntaxMode> syntaxModes = null;

		public ICollection<SyntaxMode> SyntaxModes {

			get {

				return syntaxModes;

			}

		}

		public FileSyntaxModeProvider(string directory)

		{

			this.directory = directory;

			UpdateSyntaxModeList();

		}

		public void UpdateSyntaxModeList()

		{

			string syntaxModeFile = Path.Combine(directory, "SyntaxModes.xml");

			if (File.Exists(syntaxModeFile)) {

				Stream s = File.OpenRead(syntaxModeFile);

				syntaxModes = SyntaxMode.GetSyntaxModes(s);

				s.Close();

			} else {

				syntaxModes = ScanDirectory(directory);

			}

		}

		public XmlTextReader GetSyntaxModeFile(SyntaxMode syntaxMode)

		{

			string syntaxModeFile = Path.Combine(directory, syntaxMode.FileName);

			if (!File.Exists(syntaxModeFile)) {

				throw new HighlightingDefinitionInvalidException("Can't load highlighting definition " + syntaxModeFile + " (file not found)!");

			}

			return new XmlTextReader(File.OpenRead(syntaxModeFile));

		}

		List<SyntaxMode> ScanDirectory(string directory)

		{

			string[] files = Directory.GetFiles(directory);

			List<SyntaxMode> modes = new List<SyntaxMode>();

			foreach (string file in files) {

				if (Path.GetExtension(file).Equals(".XSHD", StringComparison.OrdinalIgnoreCase)) {

					XmlTextReader reader = new XmlTextReader(file);

					while (reader.Read()) {

						if (reader.NodeType == XmlNodeType.Element) {

							switch (reader.Name) {

								case "SyntaxDefinition":

									string name       = reader.GetAttribute("name");

									string extensions = reader.GetAttribute("extensions");

									modes.Add(new SyntaxMode(Path.GetFileName(file),

									                         name,

									                         extensions));

									goto bailout;

								default:

									throw new HighlightingDefinitionInvalidException("Unknown root node in syntax highlighting file :" + reader.Name);

							}

						}

					}

				bailout:

					reader.Close();

				}

			}

			return modes;

		}

	}

}