41 lines
1.4 KiB
C#
41 lines
1.4 KiB
C#
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
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// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
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using ICSharpCode.AvalonEdit.Utils;
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using System;
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using ICSharpCode.AvalonEdit.Document;
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namespace ICSharpCode.AvalonEdit.Indentation
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{
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/// <summary>
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/// Handles indentation by copying the indentation from the previous line.
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/// Does not support indenting multiple lines.
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/// </summary>
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public class DefaultIndentationStrategy : IIndentationStrategy
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{
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/// <inheritdoc/>
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public virtual void IndentLine(TextDocument document, DocumentLine line)
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{
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if (document == null)
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throw new ArgumentNullException("document");
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if (line == null)
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throw new ArgumentNullException("line");
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DocumentLine previousLine = line.PreviousLine;
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if (previousLine != null) {
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ISegment indentationSegment = TextUtilities.GetWhitespaceAfter(document, previousLine.Offset);
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string indentation = document.GetText(indentationSegment);
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// copy indentation to line
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indentationSegment = TextUtilities.GetWhitespaceAfter(document, line.Offset);
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document.Replace(indentationSegment, indentation);
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}
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}
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/// <summary>
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/// Does nothing: indenting multiple lines is useless without a smart indentation strategy.
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/// </summary>
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public virtual void IndentLines(TextDocument document, int beginLine, int endLine)
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{
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}
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}
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}
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