were added scripting projects

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diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/VisualLineElement.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/VisualLineElement.cs
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+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Rendering/VisualLineElement.cs
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+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
+// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
+
+using System;
+using System.Collections.Generic;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.TextFormatting;
+
+using Tango.Scripting.Editors.Document;
+
+namespace Tango.Scripting.Editors.Rendering
+{
+	/// <summary>
+	/// Represents a visual element in the document.
+	/// </summary>
+	public abstract class VisualLineElement
+	{
+		/// <summary>
+		/// Creates a new VisualLineElement.
+		/// </summary>
+		/// <param name="visualLength">The length of the element in VisualLine coordinates. Must be positive.</param>
+		/// <param name="documentLength">The length of the element in the document. Must be non-negative.</param>
+		protected VisualLineElement(int visualLength, int documentLength)
+		{
+			if (visualLength < 1)
+				throw new ArgumentOutOfRangeException("visualLength", visualLength, "Value must be at least 1");
+			if (documentLength < 0)
+				throw new ArgumentOutOfRangeException("documentLength", documentLength, "Value must be at least 0");
+			this.VisualLength = visualLength;
+			this.DocumentLength = documentLength;
+		}
+		
+		/// <summary>
+		/// Gets the length of this element in visual columns.
+		/// </summary>
+		public int VisualLength { get; private set; }
+		
+		/// <summary>
+		/// Gets the length of this element in the text document.
+		/// </summary>
+		public int DocumentLength { get; private set; }
+		
+		/// <summary>
+		/// Gets the visual column where this element starts.
+		/// </summary>
+		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods",
+		                                                 Justification = "This property holds the start visual column, use GetVisualColumn to get inner visual columns.")]
+		public int VisualColumn { get; internal set; }
+		
+		/// <summary>
+		/// Gets the text offset where this element starts, relative to the start text offset of the visual line.
+		/// </summary>
+		public int RelativeTextOffset { get; internal set; }
+		
+		/// <summary>
+		/// Gets the text run properties.
+		/// A unique <see cref="VisualLineElementTextRunProperties"/> instance is used for each
+		/// <see cref="VisualLineElement"/>; colorizing code may assume that modifying the
+		/// <see cref="VisualLineElementTextRunProperties"/> will affect only this
+		/// <see cref="VisualLineElement"/>.
+		/// </summary>
+		public VisualLineElementTextRunProperties TextRunProperties { get; private set; }
+		
+		/// <summary>
+		/// Gets/sets the brush used for the background of this <see cref="VisualLineElement" />.
+		/// </summary>
+		public Brush BackgroundBrush { get; set; }
+		
+		internal void SetTextRunProperties(VisualLineElementTextRunProperties p)
+		{
+			this.TextRunProperties = p;
+		}
+		
+		/// <summary>
+		/// Creates the TextRun for this line element.
+		/// </summary>
+		/// <param name="startVisualColumn">
+		/// The visual column from which the run should be constructed.
+		/// Normally the same value as the <see cref="VisualColumn"/> property is used to construct the full run;
+		/// but when word-wrapping is active, partial runs might be created.
+		/// </param>
+		/// <param name="context">
+		/// Context object that contains information relevant for text run creation.
+		/// </param>
+		public abstract TextRun CreateTextRun(int startVisualColumn, ITextRunConstructionContext context);
+		
+		/// <summary>
+		/// Retrieves the text span immediately before the visual column.
+		/// </summary>
+		/// <remarks>This method is used for word-wrapping in bidirectional text.</remarks>
+		public virtual TextSpan<CultureSpecificCharacterBufferRange> GetPrecedingText(int visualColumnLimit, ITextRunConstructionContext context)
+		{
+			return null;
+		}
+		
+		/// <summary>
+		/// Gets if this VisualLineElement can be split.
+		/// </summary>
+		public virtual bool CanSplit {
+			get { return false; }
+		}
+		
+		/// <summary>
+		/// Splits the element.
+		/// </summary>
+		/// <param name="splitVisualColumn">Position inside this element at which it should be broken</param>
+		/// <param name="elements">The collection of line elements</param>
+		/// <param name="elementIndex">The index at which this element is in the elements list.</param>
+		public virtual void Split(int splitVisualColumn, IList<VisualLineElement> elements, int elementIndex)
+		{
+			throw new NotSupportedException();
+		}
+		
+		/// <summary>
+		/// Helper method for splitting this line element into two, correctly updating the
+		/// <see cref="VisualLength"/>, <see cref="DocumentLength"/>, <see cref="VisualColumn"/>
+		/// and <see cref="RelativeTextOffset"/> properties.
+		/// </summary>
+		/// <param name="firstPart">The element before the split position.</param>
+		/// <param name="secondPart">The element after the split position.</param>
+		/// <param name="splitVisualColumn">The split position as visual column.</param>
+		/// <param name="splitRelativeTextOffset">The split position as text offset.</param>
+		protected void SplitHelper(VisualLineElement firstPart, VisualLineElement secondPart, int splitVisualColumn, int splitRelativeTextOffset)
+		{
+			if (firstPart == null)
+				throw new ArgumentNullException("firstPart");
+			if (secondPart == null)
+				throw new ArgumentNullException("secondPart");
+			int relativeSplitVisualColumn = splitVisualColumn - VisualColumn;
+			int relativeSplitRelativeTextOffset = splitRelativeTextOffset - RelativeTextOffset;
+			
+			if (relativeSplitVisualColumn <= 0 || relativeSplitVisualColumn >= VisualLength)
+				throw new ArgumentOutOfRangeException("splitVisualColumn", splitVisualColumn, "Value must be between " + (VisualColumn + 1) + " and " + (VisualColumn + VisualLength - 1));
+			if (relativeSplitRelativeTextOffset < 0 || relativeSplitRelativeTextOffset > DocumentLength)
+				throw new ArgumentOutOfRangeException("splitRelativeTextOffset", splitRelativeTextOffset, "Value must be between " + (RelativeTextOffset) + " and " + (RelativeTextOffset + DocumentLength));
+			int oldVisualLength = VisualLength;
+			int oldDocumentLength = DocumentLength;
+			int oldVisualColumn = VisualColumn;
+			int oldRelativeTextOffset = RelativeTextOffset;
+			firstPart.VisualColumn = oldVisualColumn;
+			secondPart.VisualColumn = oldVisualColumn + relativeSplitVisualColumn;
+			firstPart.RelativeTextOffset = oldRelativeTextOffset;
+			secondPart.RelativeTextOffset = oldRelativeTextOffset + relativeSplitRelativeTextOffset;
+			firstPart.VisualLength = relativeSplitVisualColumn;
+			secondPart.VisualLength = oldVisualLength - relativeSplitVisualColumn;
+			firstPart.DocumentLength = relativeSplitRelativeTextOffset;
+			secondPart.DocumentLength = oldDocumentLength - relativeSplitRelativeTextOffset;
+			if (firstPart.TextRunProperties == null)
+				firstPart.TextRunProperties = TextRunProperties.Clone();
+			if (secondPart.TextRunProperties == null)
+				secondPart.TextRunProperties = TextRunProperties.Clone();
+		}
+		
+		/// <summary>
+		/// Gets the visual column of a text location inside this element.
+		/// The text offset is given relative to the visual line start.
+		/// </summary>
+		public virtual int GetVisualColumn(int relativeTextOffset)
+		{
+			if (relativeTextOffset >= this.RelativeTextOffset + DocumentLength)
+				return VisualColumn + VisualLength;
+			else
+				return VisualColumn;
+		}
+		
+		/// <summary>
+		/// Gets the text offset of a visual column inside this element.
+		/// </summary>
+		/// <returns>A text offset relative to the visual line start.</returns>
+		public virtual int GetRelativeOffset(int visualColumn)
+		{
+			if (visualColumn >= this.VisualColumn + VisualLength)
+				return RelativeTextOffset + DocumentLength;
+			else
+				return RelativeTextOffset;
+		}
+		
+		/// <summary>
+		/// Gets the next caret position inside this element.
+		/// </summary>
+		/// <param name="visualColumn">The visual column from which the search should be started.</param>
+		/// <param name="direction">The search direction (forwards or backwards).</param>
+		/// <param name="mode">Whether to stop only at word borders.</param>
+		/// <returns>The visual column of the next caret position, or -1 if there is no next caret position.</returns>
+		/// <remarks>
+		/// In the space between two line elements, it is sufficient that one of them contains a caret position;
+		/// though in many cases, both of them contain one.
+		/// </remarks>
+		public virtual int GetNextCaretPosition(int visualColumn, LogicalDirection direction, CaretPositioningMode mode)
+		{
+			int stop1 = this.VisualColumn;
+			int stop2 = this.VisualColumn + this.VisualLength;
+			if (direction == LogicalDirection.Backward) {
+				if (visualColumn > stop2 && mode != CaretPositioningMode.WordStart && mode != CaretPositioningMode.WordStartOrSymbol)
+					return stop2;
+				else if (visualColumn > stop1)
+					return stop1;
+			} else {
+				if (visualColumn < stop1)
+					return stop1;
+				else if (visualColumn < stop2 && mode != CaretPositioningMode.WordStart && mode != CaretPositioningMode.WordStartOrSymbol)
+					return stop2;
+			}
+			return -1;
+		}
+		
+		/// <summary>
+		/// Gets whether the specified offset in this element is considered whitespace.
+		/// </summary>
+		public virtual bool IsWhitespace(int visualColumn)
+		{
+			return false;
+		}
+		
+		/// <summary>
+		/// Gets whether the <see cref="GetNextCaretPosition"/> implementation handles line borders.
+		/// If this property returns false, the caller of GetNextCaretPosition should handle the line
+		/// borders (i.e. place caret stops at the start and end of the line).
+		/// This property has an effect only for VisualLineElements that are at the start or end of a
+		/// <see cref="VisualLine"/>.
+		/// </summary>
+		public virtual bool HandlesLineBorders {
+			get { return false; }
+		}
+		
+		/// <summary>
+		/// Queries the cursor over the visual line element.
+		/// </summary>
+		protected internal virtual void OnQueryCursor(QueryCursorEventArgs e)
+		{
+		}
+		
+		/// <summary>
+		/// Allows the visual line element to handle a mouse event.
+		/// </summary>
+		protected internal virtual void OnMouseDown(MouseButtonEventArgs e)
+		{
+		}
+		
+		/// <summary>
+		/// Allows the visual line element to handle a mouse event.
+		/// </summary>
+		protected internal virtual void OnMouseUp(MouseButtonEventArgs e)
+		{
+		}
+	}
+}