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Using AvalonEdit (WPF Text Editor)

, 1 Apr 2013 LGPL3
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.Collections.Generic;
using System.IO;

using ICSharpCode.AvalonEdit.Document;

namespace ICSharpCode.AvalonEdit.Indentation.CSharp
{
	/// <summary>
	/// Interface used for the indentation class to access the document.
	/// </summary>
	public interface IDocumentAccessor
	{
		/// <summary>Gets if the current line is read only (because it is not in the
		/// selected text region)</summary>
		bool IsReadOnly { get; }
		/// <summary>Gets the number of the current line.</summary>
		int LineNumber { get; }
		/// <summary>Gets/Sets the text of the current line.</summary>
		string Text { get; set; }
		/// <summary>Advances to the next line.</summary>
		bool MoveNext();
	}
	
	#region TextDocumentAccessor
	/// <summary>
	/// Adapter IDocumentAccessor -> TextDocument
	/// </summary>
	public sealed class TextDocumentAccessor : IDocumentAccessor
	{
		readonly TextDocument doc;
		readonly int minLine;
		readonly int maxLine;
		
		/// <summary>
		/// Creates a new TextDocumentAccessor.
		/// </summary>
		public TextDocumentAccessor(TextDocument document)
		{
			if (document == null)
				throw new ArgumentNullException("document");
			doc = document;
			this.minLine = 1;
			this.maxLine = doc.LineCount;
		}
		
		/// <summary>
		/// Creates a new TextDocumentAccessor that indents only a part of the document.
		/// </summary>
		public TextDocumentAccessor(TextDocument document, int minLine, int maxLine)
		{
			if (document == null)
				throw new ArgumentNullException("document");
			doc = document;
			this.minLine = minLine;
			this.maxLine = maxLine;
		}
		
		int num;
		string text;
		DocumentLine line;
		
		/// <inheritdoc/>
		public bool IsReadOnly {
			get {
				return num < minLine;
			}
		}
		
		/// <inheritdoc/>
		public int LineNumber {
			get {
				return num;
			}
		}
		
		bool lineDirty;
		
		/// <inheritdoc/>
		public string Text {
			get { return text; }
			set {
				if (num < minLine) return;
				text = value;
				lineDirty = true;
			}
		}
		
		/// <inheritdoc/>
		public bool MoveNext()
		{
			if (lineDirty) {
				doc.Replace(line, text);
				lineDirty = false;
			}
			++num;
			if (num > maxLine) return false;
			line = doc.GetLineByNumber(num);
			text = doc.GetText(line);
			return true;
		}
	}
	#endregion
}

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This article, along with any associated source code and files, is licensed under The GNU Lesser General Public License (LGPLv3)

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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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