were added scripting projects

1 files changed, 122 insertions, 0 deletions

diff --git a/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Snippets/SnippetBoundElement.cs b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Snippets/SnippetBoundElement.cs
new file mode 100644
index 000000000..92f6d4fd4
--- /dev/null
+++ b/Software/Visual_Studio/Scripting/Tango.Scripting.Editors/Snippets/SnippetBoundElement.cs
@@ -0,0 +1,122 @@
+// 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.Windows.Documents;
+using Tango.Scripting.Editors.Document;
+
+namespace Tango.Scripting.Editors.Snippets
+{
+	/// <summary>
+	/// An element that binds to a <see cref="SnippetReplaceableTextElement"/> and displays the same text.
+	/// </summary>
+	[Serializable]
+	public class SnippetBoundElement : SnippetElement
+	{
+		SnippetReplaceableTextElement targetElement;
+		
+		/// <summary>
+		/// Gets/Sets the target element.
+		/// </summary>
+		public SnippetReplaceableTextElement TargetElement {
+			get { return targetElement; }
+			set { targetElement = value; }
+		}
+		
+		/// <summary>
+		/// Converts the text before copying it.
+		/// </summary>
+		public virtual string ConvertText(string input)
+		{
+			return input;
+		}
+		
+		/// <inheritdoc/>
+		public override void Insert(InsertionContext context)
+		{
+			if (targetElement != null) {
+				TextAnchor start = context.Document.CreateAnchor(context.InsertionPosition);
+				start.MovementType = AnchorMovementType.BeforeInsertion;
+				start.SurviveDeletion = true;
+				string inputText = targetElement.Text;
+				if (inputText != null) {
+					context.InsertText(ConvertText(inputText));
+				}
+				TextAnchor end = context.Document.CreateAnchor(context.InsertionPosition);
+				end.MovementType = AnchorMovementType.BeforeInsertion;
+				end.SurviveDeletion = true;
+				AnchorSegment segment = new AnchorSegment(start, end);
+				context.RegisterActiveElement(this, new BoundActiveElement(context, targetElement, this, segment));
+			}
+		}
+		
+		/// <inheritdoc/>
+		public override Inline ToTextRun()
+		{
+			if (targetElement != null) {
+				string inputText = targetElement.Text;
+				if (inputText != null) {
+					return new Italic(new Run(ConvertText(inputText)));
+				}
+			}
+			return base.ToTextRun();
+		}
+	}
+	
+	sealed class BoundActiveElement : IActiveElement
+	{
+		InsertionContext context;
+		SnippetReplaceableTextElement targetSnippetElement;
+		SnippetBoundElement boundElement;
+		internal IReplaceableActiveElement targetElement;
+		AnchorSegment segment;
+		
+		public BoundActiveElement(InsertionContext context, SnippetReplaceableTextElement targetSnippetElement, SnippetBoundElement boundElement, AnchorSegment segment)
+		{
+			this.context = context;
+			this.targetSnippetElement = targetSnippetElement;
+			this.boundElement = boundElement;
+			this.segment = segment;
+		}
+		
+		public void OnInsertionCompleted()
+		{
+			targetElement = context.GetActiveElement(targetSnippetElement) as IReplaceableActiveElement;
+			if (targetElement != null) {
+				targetElement.TextChanged += targetElement_TextChanged;
+			}
+		}
+		
+		void targetElement_TextChanged(object sender, EventArgs e)
+		{
+			// Don't copy text if the segments overlap (we would get an endless loop).
+			// This can happen if the user deletes the text between the replaceable element and the bound element.
+			if (segment.GetOverlap(targetElement.Segment) == SimpleSegment.Invalid) {
+				int offset = segment.Offset;
+				int length = segment.Length;
+				string text = boundElement.ConvertText(targetElement.Text);
+				if (length != text.Length || text != context.Document.GetText(offset, length)) {
+					// Call replace only if we're actually changing something.
+					// Without this check, we would generate an empty undo group when the user pressed undo.
+					context.Document.Replace(offset, length, text);
+					if (length == 0) {
+						// replacing an empty anchor segment with text won't enlarge it, so we have to recreate it
+						segment = new AnchorSegment(context.Document, offset, text.Length);
+					}
+				}
+			}
+		}
+		
+		public void Deactivate(SnippetEventArgs e)
+		{
+		}
+		
+		public bool IsEditable {
+			get { return false; }
+		}
+		
+		public ISegment Segment {
+			get { return segment; }
+		}
+	}
+}