1 files changed, 154 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/HighlightedLine.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/HighlightedLine.cs
new file mode 100644
index 000000000..e6932c0aa
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Highlighting/HighlightedLine.cs
@@ -0,0 +1,154 @@
+// 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.Globalization;
+using System.IO;
+using System.Text;
+
+using Tango.Scripting.Editors.Document;
+using Tango.Scripting.Editors.Utils;
+
+namespace Tango.Scripting.Editors.Highlighting
+{
+	/// <summary>
+	/// Represents a highlighted document line.
+	/// </summary>
+	public class HighlightedLine
+	{
+		/// <summary>
+		/// Creates a new HighlightedLine instance.
+		/// </summary>
+		public HighlightedLine(TextDocument document, DocumentLine documentLine)
+		{
+			if (document == null)
+				throw new ArgumentNullException("document");
+			if (!document.Lines.Contains(documentLine))
+				throw new ArgumentException("Line is null or not part of document");
+			this.Document = document;
+			this.DocumentLine = documentLine;
+			this.Sections = new NullSafeCollection<HighlightedSection>();
+		}
+		
+		/// <summary>
+		/// Gets the document associated with this HighlightedLine.
+		/// </summary>
+		public TextDocument Document { get; private set; }
+		
+		/// <summary>
+		/// Gets the document line associated with this HighlightedLine.
+		/// </summary>
+		public DocumentLine DocumentLine { get; private set; }
+		
+		/// <summary>
+		/// Gets the highlighted sections.
+		/// The sections are not overlapping, but they may be nested.
+		/// In that case, outer sections come in the list before inner sections.
+		/// The sections are sorted by start offset.
+		/// </summary>
+		public IList<HighlightedSection> Sections { get; private set; }
+		
+		/// <summary>
+		/// Gets the default color of all text outside a <see cref="HighlightedSection"/>.
+		/// </summary>
+		public HighlightingColor DefaultTextColor { get; set; }
+		
+		sealed class HtmlElement : IComparable<HtmlElement>
+		{
+			internal readonly int Offset;
+			internal readonly int Nesting;
+			internal readonly bool IsEnd;
+			internal readonly HighlightingColor Color;
+			
+			public HtmlElement(int offset, int nesting, bool isEnd, HighlightingColor color)
+			{
+				this.Offset = offset;
+				this.Nesting = nesting;
+				this.IsEnd = isEnd;
+				this.Color = color;
+			}
+			
+			public int CompareTo(HtmlElement other)
+			{
+				int r = Offset.CompareTo(other.Offset);
+				if (r != 0)
+					return r;
+				if (IsEnd != other.IsEnd) {
+					if (IsEnd)
+						return -1;
+					else
+						return 1;
+				} else {
+					if (IsEnd)
+						return other.Nesting.CompareTo(Nesting);
+					else
+						return Nesting.CompareTo(other.Nesting);
+				}
+			}
+		}
+		
+		/// <summary>
+		/// Produces HTML code for the line, with &lt;span class="colorName"&gt; tags.
+		/// </summary>
+		public string ToHtml(HtmlOptions options)
+		{
+			int startOffset = this.DocumentLine.Offset;
+			return ToHtml(startOffset, startOffset + this.DocumentLine.Length, options);
+		}
+		
+		/// <summary>
+		/// Produces HTML code for a section of the line, with &lt;span class="colorName"&gt; tags.
+		/// </summary>
+		public string ToHtml(int startOffset, int endOffset, HtmlOptions options)
+		{
+			if (options == null)
+				throw new ArgumentNullException("options");
+			int documentLineStartOffset = this.DocumentLine.Offset;
+			int documentLineEndOffset = documentLineStartOffset + this.DocumentLine.Length;
+			if (startOffset < documentLineStartOffset || startOffset > documentLineEndOffset)
+				throw new ArgumentOutOfRangeException("startOffset", startOffset, "Value must be between " + documentLineStartOffset + " and " + documentLineEndOffset);
+			if (endOffset < startOffset || endOffset > documentLineEndOffset)
+				throw new ArgumentOutOfRangeException("endOffset", endOffset, "Value must be between startOffset and " + documentLineEndOffset);
+			ISegment requestedSegment = new SimpleSegment(startOffset, endOffset - startOffset);
+			
+			List<HtmlElement> elements = new List<HtmlElement>();
+			for (int i = 0; i < this.Sections.Count; i++) {
+				HighlightedSection s = this.Sections[i];
+				if (s.GetOverlap(requestedSegment).Length > 0) {
+					elements.Add(new HtmlElement(s.Offset, i, false, s.Color));
+					elements.Add(new HtmlElement(s.Offset + s.Length, i, true, s.Color));
+				}
+			}
+			elements.Sort();
+			
+			TextDocument document = this.Document;
+			StringWriter w = new StringWriter(CultureInfo.InvariantCulture);
+			int textOffset = startOffset;
+			foreach (HtmlElement e in elements) {
+				int newOffset = Math.Min(e.Offset, endOffset);
+				if (newOffset > startOffset) {
+					HtmlClipboard.EscapeHtml(w, document.GetText(textOffset, newOffset - textOffset), options);
+				}
+				textOffset = Math.Max(textOffset, newOffset);
+				if (options.ColorNeedsSpanForStyling(e.Color)) {
+					if (e.IsEnd) {
+						w.Write("</span>");
+					} else {
+						w.Write("<span");
+						options.WriteStyleAttributeForColor(w, e.Color);
+						w.Write('>');
+					}
+				}
+			}
+			HtmlClipboard.EscapeHtml(w, document.GetText(textOffset, endOffset - textOffset), options);
+			return w.ToString();
+		}
+		
+		/// <inheritdoc/>
+		public override string ToString()
+		{
+			return "[" + GetType().Name + " " + ToHtml(new HtmlOptions()) + "]";
+		}
+	}
+}