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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 ICSharpCode.AvalonEdit.Document;
namespace ICSharpCode.AvalonEdit.Indentation.CSharp
{
/// <summary>
/// Smart indentation for C#.
/// </summary>
public class CSharpIndentationStrategy : DefaultIndentationStrategy
{
/// <summary>
/// Creates a new CSharpIndentationStrategy.
/// </summary>
public CSharpIndentationStrategy()
{
}
/// <summary>
/// Creates a new CSharpIndentationStrategy and initializes the settings using the text editor options.
/// </summary>
public CSharpIndentationStrategy(TextEditorOptions options)
{
this.IndentationString = options.IndentationString;
}
string indentationString = "\t";
/// <summary>
/// Gets/Sets the indentation string.
/// </summary>
public string IndentationString {
get { return indentationString; }
set {
if (string.IsNullOrEmpty(value))
throw new ArgumentException("Indentation string must not be null or empty");
indentationString = value;
}
}
/// <summary>
/// Performs indentation using the specified document accessor.
/// </summary>
/// <param name="document">Object used for accessing the document line-by-line</param>
/// <param name="keepEmptyLines">Specifies whether empty lines should be kept</param>
public void Indent(IDocumentAccessor document, bool keepEmptyLines)
{
if (document == null)
throw new ArgumentNullException("document");
IndentationSettings settings = new IndentationSettings();
settings.IndentString = this.IndentationString;
settings.LeaveEmptyLines = keepEmptyLines;
IndentationReformatter r = new IndentationReformatter();
r.Reformat(document, settings);
}
/// <inheritdoc cref="IIndentationStrategy.IndentLine"/>
public override void IndentLine(TextDocument document, DocumentLine line)
{
int lineNr = line.LineNumber;
TextDocumentAccessor acc = new TextDocumentAccessor(document, lineNr, lineNr);
Indent(acc, false);
string t = acc.Text;
if (t.Length == 0) {
// use AutoIndentation for new lines in comments / verbatim strings.
base.IndentLine(document, line);
}
}
/// <inheritdoc cref="IIndentationStrategy.IndentLines"/>
public override void IndentLines(TextDocument document, int beginLine, int endLine)
{
Indent(new TextDocumentAccessor(document, beginLine, endLine), true);
}
}
}
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