56 lines
2.7 KiB
C#
56 lines
2.7 KiB
C#
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// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using Unity.CodeEditor.Document;
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namespace Unity.CodeEditor.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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internal 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) throw new ArgumentNullException(nameof(document));
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if (line == null) throw new ArgumentNullException(nameof(line));
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var previousLine = line.PreviousLine;
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if (previousLine != null)
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{
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var indentationSegment = TextUtilities.GetWhitespaceAfter(document, previousLine.Offset);
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var 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.Offset, indentationSegment.Length, indentation,
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OffsetChangeMappingType.RemoveAndInsert);
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// OffsetChangeMappingType.RemoveAndInsert guarantees the caret moves behind the new 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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