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ICSharpCode.TextEditor/Project/Src/Document/BookmarkManager/Bookmark.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.Drawing;
+using SWF = System.Windows.Forms;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	/// <summary>
+	/// Description of Bookmark.
+	/// </summary>
+	public class Bookmark
+	{
+		IDocument document;
+		TextAnchor anchor;
+		TextLocation location;
+		bool isEnabled = true;
+		
+		public IDocument Document {
+			get {
+				return document;
+			}
+			set {
+				if (document != value) {
+					if (anchor != null) {
+						location = anchor.Location;
+						anchor = null;
+					}
+					document = value;
+					CreateAnchor();
+					OnDocumentChanged(EventArgs.Empty);
+				}
+			}
+		}
+		
+		void CreateAnchor()
+		{
+			if (document != null) {
+				LineSegment line = document.GetLineSegment(Math.Max(0, Math.Min(location.Line, document.TotalNumberOfLines-1)));
+				anchor = line.CreateAnchor(Math.Max(0, Math.Min(location.Column, line.Length)));
+				// after insertion: keep bookmarks after the initial whitespace (see DefaultFormattingStrategy.SmartReplaceLine)
+				anchor.MovementType = AnchorMovementType.AfterInsertion;
+				anchor.Deleted += AnchorDeleted;
+			}
+		}
+		
+		void AnchorDeleted(object sender, EventArgs e)
+		{
+			document.BookmarkManager.RemoveMark(this);
+		}
+		
+		/// <summary>
+		/// Gets the TextAnchor used for this bookmark.
+		/// Is null if the bookmark is not connected to a document.
+		/// </summary>
+		public TextAnchor Anchor {
+			get { return anchor; }
+		}
+		
+		public TextLocation Location {
+			get {
+				if (anchor != null)
+					return anchor.Location;
+				else
+					return location;
+			}
+			set {
+				location = value;
+				CreateAnchor();
+			}
+		}
+		
+		public event EventHandler DocumentChanged;
+		
+		protected virtual void OnDocumentChanged(EventArgs e)
+		{
+			if (DocumentChanged != null) {
+				DocumentChanged(this, e);
+			}
+		}
+		
+		public bool IsEnabled {
+			get {
+				return isEnabled;
+			}
+			set {
+				if (isEnabled != value) {
+					isEnabled = value;
+					if (document != null) {
+						document.RequestUpdate(new TextAreaUpdate(TextAreaUpdateType.SingleLine, LineNumber));
+						document.CommitUpdate();
+					}
+					OnIsEnabledChanged(EventArgs.Empty);
+				}
+			}
+		}
+		
+		public event EventHandler IsEnabledChanged;
+		
+		protected virtual void OnIsEnabledChanged(EventArgs e)
+		{
+			if (IsEnabledChanged != null) {
+				IsEnabledChanged(this, e);
+			}
+		}
+		
+		public int LineNumber {
+			get {
+				if (anchor != null)
+					return anchor.LineNumber;
+				else
+					return location.Line;
+			}
+		}
+		
+		public int ColumnNumber {
+			get {
+				if (anchor != null)
+					return anchor.ColumnNumber;
+				else
+					return location.Column;
+			}
+		}
+		
+		/// <summary>
+		/// Gets if the bookmark can be toggled off using the 'set/unset bookmark' command.
+		/// </summary>
+		public virtual bool CanToggle {
+			get {
+				return true;
+			}
+		}
+		
+		public Bookmark(IDocument document, TextLocation location) : this(document, location, true)
+		{
+		}
+		
+		public Bookmark(IDocument document, TextLocation location, bool isEnabled)
+		{
+			this.document = document;
+			this.isEnabled = isEnabled;
+			this.Location = location;
+		}
+		
+		public virtual bool Click(SWF.Control parent, SWF.MouseEventArgs e)
+		{
+			if (e.Button == SWF.MouseButtons.Left && CanToggle) {
+				document.BookmarkManager.RemoveMark(this);
+				return true;
+			}
+			return false;
+		}
+		
+		public virtual void Draw(IconBarMargin margin, Graphics g, Point p)
+		{
+			margin.DrawBookmark(g, p.Y, isEnabled);
+		}
+	}
+}