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ICSharpCode.TextEditor/Project/Src/Document/BookmarkManager/BookmarkManagerMemento.cs

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+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.Collections.Generic;
+using System.Xml;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	/// <summary>
+	/// This class is used for storing the state of a bookmark manager 
+	/// </summary>
+	public class BookmarkManagerMemento
+	{
+		List<int> bookmarks = new List<int>();
+		
+		/// <value>
+		/// Contains all bookmarks as int values
+		/// </value>
+		public List<int> Bookmarks {
+			get {
+				return bookmarks;
+			}
+			set {
+				bookmarks = value;
+			}
+		}
+		
+		/// <summary>
+		/// Validates all bookmarks if they're in range of the document.
+		/// (removing all bookmarks &lt; 0 and bookmarks &gt; max. line number
+		/// </summary>
+		public void CheckMemento(IDocument document)
+		{
+			for (int i = 0; i < bookmarks.Count; ++i) {
+				int mark = (int)bookmarks[i];
+				if (mark < 0 || mark >= document.TotalNumberOfLines) {
+					bookmarks.RemoveAt(i);
+					--i;
+				}
+			}
+		}
+		
+		/// <summary>
+		/// Creates a new instance of <see cref="BookmarkManagerMemento"/>
+		/// </summary>
+		public BookmarkManagerMemento()
+		{
+		}
+		
+		/// <summary>
+		/// Creates a new instance of <see cref="BookmarkManagerMemento"/>
+		/// </summary>
+		public BookmarkManagerMemento(XmlElement element)
+		{
+			foreach (XmlElement el in element.ChildNodes) {
+				bookmarks.Add(int.Parse(el.Attributes["line"].InnerText));
+			}
+		}
+		
+		/// <summary>
+		/// Creates a new instance of <see cref="BookmarkManagerMemento"/>
+		/// </summary>
+		public BookmarkManagerMemento(List<int> bookmarks)
+		{
+			this.bookmarks = bookmarks;
+		}
+		
+		/// <summary>
+		/// Converts a xml element to a <see cref="BookmarkManagerMemento"/> object
+		/// </summary>
+		public object FromXmlElement(XmlElement element)
+		{
+			return new BookmarkManagerMemento(element);
+		}
+		
+		/// <summary>
+		/// Converts this <see cref="BookmarkManagerMemento"/> to a xml element
+		/// </summary>
+		public XmlElement ToXmlElement(XmlDocument doc)
+		{
+			XmlElement bookmarknode  = doc.CreateElement("Bookmarks");
+			
+			foreach (int line in bookmarks) {
+				XmlElement markNode = doc.CreateElement("Mark");
+				
+				XmlAttribute lineAttr = doc.CreateAttribute("line");
+				lineAttr.InnerText = line.ToString();
+				markNode.Attributes.Append(lineAttr);
+						
+				bookmarknode.AppendChild(markNode);
+			}
+			
+			return bookmarknode;
+		}
+	}
+}