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Using AvalonEdit (WPF Text Editor)

, 1 Apr 2013
AvalonEdit is an extensible Open-Source text editor with support for syntax highlighting and folding.
AvalonEdit_4.3.1_Binaries-noexe.zip
AvalonEdit_4.3.1_Binaries.zip
AvalonEdit.Sample.exe
ICSharpCode.AvalonEdit.dll
AvalonEdit_4.3.1_Source-noexe.zip
AvalonEdit.Sample
AvalonEdit
dependencies.png
folding.png
renderingPipeline.png
screenshot.png
snoop.png
CustomHighlighting.xshd
Images
Copy.png
Cut.png
Delete.png
Open.png
Paste.png
Redo.png
Save.png
Undo.png
WordWrap.png
Properties
RenderingPipeline.pptx
Documentation
Architecture.aml
Code Completion.aml
Coordinate Systems.aml
Folding.aml
ICSharpCode.AvalonEdit.content
ICSharpCode.AvalonEdit.shfbproj
Media
NamespaceDependencies.png
RenderingPipeline.png
VisualTree.png
WelcomeScreenshot.png
Sample Application.aml
Syntax Highlighting.aml
Text Rendering.aml
Welcome.aml
ICSharpCode.AvalonEdit.Tests
Document
Editing
Highlighting
ICSharpCode.AvalonEdit.Tests.PartCover.Settings
Properties
Search
Utils
ICSharpCode.AvalonEdit
CodeCompletion
Document
Editing
Folding
Highlighting
Resources
ASPX.xshd
Boo.xshd
Coco-Mode.xshd
CPP-Mode.xshd
CSharp-Mode.xshd
CSS-Mode.xshd
HTML-Mode.xshd
Java-Mode.xshd
JavaScript-Mode.xshd
MarkDown-Mode.xshd
Patch-Mode.xshd
PHP-Mode.xshd
PowerShell.xshd
Tex-Mode.xshd
VBNET-Mode.xshd
XML-Mode.xshd
XmlDoc.xshd
Xshd
ICSharpCode.AvalonEdit.snk
Indentation
CSharp
Properties
Rendering
Search
next.png
prev.png
Snippets
themes
RightArrow.cur
Utils
Xml
AvalonEdit_4.3.1_Source.zip
dependencies.png
folding.png
renderingPipeline.png
screenshot.png
snoop.png
CustomHighlighting.xshd
Copy.png
Cut.png
Delete.png
Open.png
Paste.png
Redo.png
Save.png
Undo.png
WordWrap.png
RenderingPipeline.pptx
Architecture.aml
Code Completion.aml
Coordinate Systems.aml
Folding.aml
ICSharpCode.AvalonEdit.content
ICSharpCode.AvalonEdit.shfbproj
NamespaceDependencies.png
RenderingPipeline.png
VisualTree.png
WelcomeScreenshot.png
Sample Application.aml
Syntax Highlighting.aml
Text Rendering.aml
Welcome.aml
ICSharpCode.AvalonEdit.Tests.PartCover.Settings
nunit.framework.dll
ASPX.xshd
Boo.xshd
Coco-Mode.xshd
CPP-Mode.xshd
CSharp-Mode.xshd
CSS-Mode.xshd
HTML-Mode.xshd
Java-Mode.xshd
JavaScript-Mode.xshd
MarkDown-Mode.xshd
Patch-Mode.xshd
PHP-Mode.xshd
PowerShell.xshd
Tex-Mode.xshd
VBNET-Mode.xshd
XML-Mode.xshd
XmlDoc.xshd
ICSharpCode.AvalonEdit.snk
next.png
prev.png
RightArrow.cur
AvalonEdit_Binaries-noexe.zip
AvalonEdit_Binaries.zip
AvalonEdit.Sample.exe
ICSharpCode.AvalonEdit.dll
AvalonEdit_CHM_Documentation.zip
AvalonEdit Documentation.chm
AvalonEdit_Source.zip
dependencies.png
folding.png
renderingPipeline.png
screenshot.png
snoop.png
CustomHighlighting.xshd
Copy.png
Cut.png
Delete.png
Open.png
Paste.png
Redo.png
Save.png
Undo.png
WordWrap.png
RenderingPipeline.pptx
Architecture.aml
Code Completion.aml
Coordinate Systems.aml
Folding.aml
Help
ICSharpCode.AvalonEdit.content
ICSharpCode.AvalonEdit.shfbproj
NamespaceDependencies.png
RenderingPipeline.png
VisualTree.png
WelcomeScreenshot.png
Sample Application.aml
Syntax Highlighting.aml
Text Rendering.aml
Welcome.aml
ICSharpCode.AvalonEdit.Tests.PartCover.Settings
nunit.framework.dll
ASPX.xshd
Boo.xshd
Coco-Mode.xshd
CPP-Mode.xshd
CSharp-Mode.xshd
CSS-Mode.xshd
HTML-Mode.xshd
Java-Mode.xshd
JavaScript-Mode.xshd
Patch-Mode.xshd
PHP-Mode.xshd
PowerShell.xshd
Tex-Mode.xshd
VBNET-Mode.xshd
XML-Mode.xshd
XmlDoc.xshd
ICSharpCode.AvalonEdit.snk
next.png
prev.png
RightArrow.cur
// 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;

namespace ICSharpCode.AvalonEdit.Rendering
{
	/// <summary>
	/// An enumeration of well-known layers.
	/// </summary>
	public enum KnownLayer
	{
		/// <summary>
		/// This layer is in the background.
		/// There is no UIElement to represent this layer, it is directly drawn in the TextView.
		/// It is not possible to replace the background layer or insert new layers below it.
		/// </summary>
		/// <remarks>This layer is below the Selection layer.</remarks>
		Background,
		/// <summary>
		/// This layer contains the selection rectangle.
		/// </summary>
		/// <remarks>This layer is between the Background and the Text layers.</remarks>
		Selection,
		/// <summary>
		/// This layer contains the text and inline UI elements.
		/// </summary>
		/// <remarks>This layer is between the Selection and the Caret layers.</remarks>
		Text,
		/// <summary>
		/// This layer contains the blinking caret.
		/// </summary>
		/// <remarks>This layer is above the Text layer.</remarks>
		Caret
	}
	
	/// <summary>
	/// Specifies where a new layer is inserted, in relation to an old layer.
	/// </summary>
	public enum LayerInsertionPosition
	{
		/// <summary>
		/// The new layer is inserted below the specified layer.
		/// </summary>
		Below,
		/// <summary>
		/// The new layer replaces the specified layer. The old layer is removed
		/// from the <see cref="TextView.Layers"/> collection.
		/// </summary>
		Replace,
		/// <summary>
		/// The new layer is inserted above the specified layer.
		/// </summary>
		Above
	}
	
	sealed class LayerPosition : IComparable<LayerPosition>
	{
		internal static readonly DependencyProperty LayerPositionProperty =
			DependencyProperty.RegisterAttached("LayerPosition", typeof(LayerPosition), typeof(LayerPosition));
		
		public static void SetLayerPosition(UIElement layer, LayerPosition value)
		{
			layer.SetValue(LayerPositionProperty, value);
		}
		
		public static LayerPosition GetLayerPosition(UIElement layer)
		{
			return (LayerPosition)layer.GetValue(LayerPositionProperty);
		}
		
		internal readonly KnownLayer KnownLayer;
		internal readonly LayerInsertionPosition Position;
		
		public LayerPosition(KnownLayer knownLayer, LayerInsertionPosition position)
		{
			this.KnownLayer = knownLayer;
			this.Position = position;
		}
		
		public int CompareTo(LayerPosition other)
		{
			int r = this.KnownLayer.CompareTo(other.KnownLayer);
			if (r != 0)
				return r;
			else
				return this.Position.CompareTo(other.Position);
		}
	}
}

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About the Author

Daniel Grunwald

Germany Germany
I am the lead developer on the SharpDevelop open source project.
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Web04 | 2.8.140905.1 | Last Updated 1 Apr 2013
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