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ICSharpCode.TextEditor/Project/Src/Document/MarkerStrategy/MarkerStrategy.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.Drawing;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	/// <summary>
+	/// Manages the list of markers and provides ways to retrieve markers for specific positions.
+	/// </summary>
+	public sealed class MarkerStrategy
+	{
+		List<TextMarker> textMarker = new List<TextMarker>();
+		IDocument document;
+		
+		public IDocument Document {
+			get {
+				return document;
+			}
+		}
+		
+		public IEnumerable<TextMarker> TextMarker {
+			get {
+				return textMarker.AsReadOnly();
+			}
+		}
+		
+		public void AddMarker(TextMarker item)
+		{
+			markersTable.Clear();
+			textMarker.Add(item);
+		}
+		
+		public void InsertMarker(int index, TextMarker item)
+		{
+			markersTable.Clear();
+			textMarker.Insert(index, item);
+		}
+		
+		public void RemoveMarker(TextMarker item)
+		{
+			markersTable.Clear();
+			textMarker.Remove(item);
+		}
+		
+		public void RemoveAll(Predicate<TextMarker> match)
+		{
+			markersTable.Clear();
+			textMarker.RemoveAll(match);
+		}
+		
+		public MarkerStrategy(IDocument document)
+		{
+			this.document = document;
+			document.DocumentChanged += new DocumentEventHandler(DocumentChanged);
+		}
+		
+		Dictionary<int, List<TextMarker>> markersTable = new Dictionary<int, List<TextMarker>>();
+		
+		public List<TextMarker> GetMarkers(int offset)
+		{
+			if (!markersTable.ContainsKey(offset)) {
+				List<TextMarker> markers = new List<TextMarker>();
+				for (int i = 0; i < textMarker.Count; ++i) {
+					TextMarker marker = (TextMarker)textMarker[i];
+					if (marker.Offset <= offset && offset <= marker.EndOffset) {
+						markers.Add(marker);
+					}
+				}
+				markersTable[offset] = markers;
+			}
+			return markersTable[offset];
+		}
+		
+		public List<TextMarker> GetMarkers(int offset, int length)
+		{
+			int endOffset = offset + length - 1;
+			List<TextMarker> markers = new List<TextMarker>();
+			for (int i = 0; i < textMarker.Count; ++i) {
+				TextMarker marker = (TextMarker)textMarker[i];
+				if (// start in marker region
+				    marker.Offset <= offset && offset <= marker.EndOffset ||
+				    // end in marker region
+				    marker.Offset <= endOffset && endOffset <= marker.EndOffset ||
+				    // marker start in region
+				    offset <= marker.Offset && marker.Offset <= endOffset ||
+				    // marker end in region
+				    offset <= marker.EndOffset && marker.EndOffset <= endOffset
+				   )
+				{
+					markers.Add(marker);
+				}
+			}
+			return markers;
+		}
+		
+		public List<TextMarker> GetMarkers(TextLocation position)
+		{
+			if (position.Y >= document.TotalNumberOfLines || position.Y < 0) {
+				return new List<TextMarker>();
+			}
+			LineSegment segment = document.GetLineSegment(position.Y);
+			return GetMarkers(segment.Offset + position.X);
+		}
+		
+		void DocumentChanged(object sender, DocumentEventArgs e)
+		{
+			// reset markers table
+			markersTable.Clear();
+			document.UpdateSegmentListOnDocumentChange(textMarker, e);
+		}
+	}
+}

ICSharpCode.TextEditor/Project/Src/Document/MarkerStrategy/TextMarker.cs

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+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Daniel Grunwald" email="daniel@danielgrunwald.de"/>
+//     <version>$Revision$</version>
+// </file>
+
+using System;
+using System.Drawing;
+
+namespace ICSharpCode.TextEditor.Document
+{
+	public enum TextMarkerType
+	{
+		Invisible,
+		SolidBlock,
+		Underlined,
+		WaveLine
+	}
+	
+	/// <summary>
+	/// Marks a part of a document.
+	/// </summary>
+	public class TextMarker : AbstractSegment
+	{
+		TextMarkerType textMarkerType;
+		Color          color;
+		Color          foreColor;
+		string         toolTip = null;
+		bool           overrideForeColor = false;
+		
+		public TextMarkerType TextMarkerType {
+			get {
+				return textMarkerType;
+			}
+		}
+		
+		public Color Color {
+			get {
+				return color;
+			}
+		}
+		
+		public Color ForeColor {
+			get {
+				return foreColor;
+			}
+		}
+		
+		public bool OverrideForeColor {
+			get {
+				return overrideForeColor;
+			}
+		}
+		
+		/// <summary>
+		/// Marks the text segment as read-only.
+		/// </summary>
+		public bool IsReadOnly { get; set; }
+		
+		public string ToolTip {
+			get {
+				return toolTip;
+			}
+			set {
+				toolTip = value;
+			}
+		}
+		
+		/// <summary>
+		/// Gets the last offset that is inside the marker region.
+		/// </summary>
+		public int EndOffset {
+			get {
+				return Offset + Length - 1;
+			}
+		}
+		
+		public TextMarker(int offset, int length, TextMarkerType textMarkerType) : this(offset, length, textMarkerType, Color.Red)
+		{
+		}
+		
+		public TextMarker(int offset, int length, TextMarkerType textMarkerType, Color color)
+		{
+			if (length < 1) length = 1;
+			this.offset          = offset;
+			this.length          = length;
+			this.textMarkerType  = textMarkerType;
+			this.color           = color;
+		}
+		
+		public TextMarker(int offset, int length, TextMarkerType textMarkerType, Color color, Color foreColor)
+		{
+			if (length < 1) length = 1;
+			this.offset          = offset;
+			this.length          = length;
+			this.textMarkerType  = textMarkerType;
+			this.color           = color;
+			this.foreColor       = foreColor;
+			this.overrideForeColor = true;
+		}
+	}
+}