At "Caret Line" to text editor (disabled by default) - based on patch by Troy Simpson.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@3440 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/ICSharpCode.TextEditor/Project/Src/Document/DefaultTextEditorProperties.cs

@@ -37,6 +37,8 @@ namespace ICSharpCode.TextEditor.Document
 		
 		bool        allowCaretBeyondEOL = false;
 
+		bool        caretLine           = false;
+		
 		bool        showMatchingBracket = true;
 		bool        showLineNumbers     = true;
 		
@@ -86,6 +88,18 @@ namespace ICSharpCode.TextEditor.Document
 				indentStyle = value;
 			}
 		}
+
+		public bool CaretLine {
+			get
+			{
+				return caretLine;
+			}
+			set
+			{
+				caretLine = value;
+			}
+		}
+
 		public DocumentSelectionMode DocumentSelectionMode {
 			get {
 				return documentSelectionMode;

src/Libraries/ICSharpCode.TextEditor/Project/Src/Document/HighlightingStrategy/DefaultHighlightingStrategy.cs

@@ -71,6 +71,7 @@ namespace ICSharpCode.TextEditor.Document
 			environmentColors["VRuler"]           = new HighlightColor("ControlLight", "Window", false, false);
 			environmentColors["InvalidLines"]     = new HighlightColor(Color.Red, false, false);
 			environmentColors["CaretMarker"]      = new HighlightColor(Color.Yellow, false, false);
+			environmentColors["CaretLine"] = new HighlightBackground("ControlLight", "Window", false, false);
 			environmentColors["LineNumbers"] = new HighlightBackground("ControlDark", "Window", false, false);
 			
 			environmentColors["FoldLine"]         = new HighlightColor(Color.FromArgb(0x80, 0x80, 0x80), Color.Black, false, false);

src/Libraries/ICSharpCode.TextEditor/Project/Src/Document/ITextEditorProperties.cs

@@ -13,6 +13,12 @@ namespace ICSharpCode.TextEditor.Document
 {
 	public interface ITextEditorProperties
 	{
+		bool CaretLine
+		{
+			get;
+			set;
+		}
+
 		bool AutoInsertCurlyBracket { // is wrapped in text editor control
 			get;
 			set;

src/Libraries/ICSharpCode.TextEditor/Project/Src/Gui/Caret.cs

@@ -235,10 +235,27 @@ namespace ICSharpCode.TextEditor
 				UpdateCaretPosition();
 		}
 
+		void PaintCaretLine(Graphics g)
+		{
+			if (!textArea.Document.TextEditorProperties.CaretLine)
+				return;
+
+			HighlightColor caretLineColor = textArea.Document.HighlightingStrategy.GetColorFor("CaretLine");
+
+			g.DrawLine(BrushRegistry.GetDotPen(caretLineColor.Color, caretLineColor.BackgroundColor),
+			           currentPos.X,
+			           0,
+			           currentPos.X,
+			           textArea.DisplayRectangle.Height);
+		}
+
 		public void UpdateCaretPosition()
 		{
 			Log("UpdateCaretPosition");
 			
+			if (textArea.TextEditorProperties.CaretLine) {
+				textArea.Invalidate();
+			} else {
 				if (caretImplementation.RequireRedrawOnPositionChange) {
 					textArea.UpdateLine(oldLine);
 					if (line != oldLine)
@@ -249,6 +266,7 @@ namespace ICSharpCode.TextEditor
 						textArea.UpdateLine(line);
 					}
 				}
+			}
 			oldLine = line;
 			
 			
@@ -297,6 +315,7 @@ namespace ICSharpCode.TextEditor
 		internal void PaintCaret(Graphics g)
 		{
 			caretImplementation.PaintCaret(g);
+			PaintCaretLine(g);
 		}
 		
 		abstract class CaretImplementation : IDisposable

src/Main/Base/Project/Src/TextEditor/Gui/Editor/SharpDevelopTextEditorProperties.cs

@@ -99,6 +99,15 @@ namespace ICSharpCode.SharpDevelop.DefaultEditor.Gui.Editor
 			}
 		}
 		
+		public bool CaretLine {
+			get {
+				return properties.Get("CaretLine", false);
+			}
+			set {
+				properties.Set("CaretLine", value);
+			}
+		}
+
 		public bool ShowQuickClassBrowserPanel {
 			get {
 				return properties.Get("ShowQuickClassBrowserPanel", true);