first commit

ICSharpCode.TextEditor/Project/Src/Gui/BracketHighlighter.cs

@@ -0,0 +1,86 @@
+// <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 ICSharpCode.TextEditor.Document;
+
+namespace ICSharpCode.TextEditor
+{
+	public class Highlight
+	{
+		public TextLocation OpenBrace { get; set; }
+		public TextLocation CloseBrace { get; set; }
+		
+		public Highlight(TextLocation openBrace, TextLocation closeBrace)
+		{
+			this.OpenBrace = openBrace;
+			this.CloseBrace = closeBrace;
+		}
+	}
+	
+	public class BracketHighlightingSheme
+	{
+		char opentag;
+		char closingtag;
+		
+		public char OpenTag {
+			get {
+				return opentag;
+			}
+			set {
+				opentag = value;
+			}
+		}
+		
+		public char ClosingTag {
+			get {
+				return closingtag;
+			}
+			set {
+				closingtag = value;
+			}
+		}
+		
+		public BracketHighlightingSheme(char opentag, char closingtag)
+		{
+			this.opentag    = opentag;
+			this.closingtag = closingtag;
+		}
+		
+		public Highlight GetHighlight(IDocument document, int offset)
+		{
+			int searchOffset;
+			if (document.TextEditorProperties.BracketMatchingStyle == BracketMatchingStyle.After) {
+				searchOffset = offset;
+			} else {
+				searchOffset = offset + 1;
+			}
+			char word = document.GetCharAt(Math.Max(0, Math.Min(document.TextLength - 1, searchOffset)));
+			
+			TextLocation endP = document.OffsetToPosition(searchOffset);
+			if (word == opentag) {
+				if (searchOffset < document.TextLength) {
+					int bracketOffset = TextUtilities.SearchBracketForward(document, searchOffset + 1, opentag, closingtag);
+					if (bracketOffset >= 0) {
+						TextLocation p = document.OffsetToPosition(bracketOffset);
+						return new Highlight(p, endP);
+					}
+				}
+			} else if (word == closingtag) {
+				if (searchOffset > 0) {
+					int bracketOffset = TextUtilities.SearchBracketBackward(document, searchOffset - 1, opentag, closingtag);
+					if (bracketOffset >= 0) {
+						TextLocation p = document.OffsetToPosition(bracketOffset);
+						return new Highlight(p, endP);
+					}
+				}
+			}
+			return null;
+		}
+	}
+}