71 lines
2.2 KiB
C#
71 lines
2.2 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 System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Windows.Documents;
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using ICSharpCode.AvalonEdit.Document;
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namespace ICSharpCode.AvalonEdit.Search
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{
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class RegexSearchStrategy : ISearchStrategy
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{
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readonly Regex searchPattern;
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readonly bool matchWholeWords;
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public RegexSearchStrategy(Regex searchPattern, bool matchWholeWords)
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{
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if (searchPattern == null)
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throw new ArgumentNullException("searchPattern");
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this.searchPattern = searchPattern;
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this.matchWholeWords = matchWholeWords;
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}
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public IEnumerable<ISearchResult> FindAll(ITextSource document, int offset, int length)
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{
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int endOffset = offset + length;
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foreach (Match result in searchPattern.Matches(document.Text)) {
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int resultEndOffset = result.Length + result.Index;
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if (offset > result.Index || endOffset < resultEndOffset)
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continue;
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if (matchWholeWords && (!IsWordBorder(document, result.Index) || !IsWordBorder(document, resultEndOffset)))
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continue;
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yield return new SearchResult { StartOffset = result.Index, Length = result.Length, Data = result };
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}
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}
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static bool IsWordBorder(ITextSource document, int offset)
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{
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return TextUtilities.GetNextCaretPosition(document, offset - 1, LogicalDirection.Forward, CaretPositioningMode.WordBorder) == offset;
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}
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public ISearchResult FindNext(ITextSource document, int offset, int length)
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{
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return FindAll(document, offset, length).FirstOrDefault();
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}
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public bool Equals(ISearchStrategy other)
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{
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var strategy = other as RegexSearchStrategy;
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return strategy != null &&
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strategy.searchPattern.ToString() == searchPattern.ToString() &&
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strategy.searchPattern.Options == searchPattern.Options &&
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strategy.searchPattern.RightToLeft == searchPattern.RightToLeft;
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}
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}
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class SearchResult : TextSegment, ISearchResult
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{
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public Match Data { get; set; }
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public string ReplaceWith(string replacement)
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{
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return Data.Result(replacement);
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}
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}
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}
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