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source: stable/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Search/RegexSearchStrategy.cs @ 18091

Last change on this file since 18091 was 11700, checked in by jkarder, 10 years ago

#2077: created branch and added first version

File size: 3.2 KB
Line 
1// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
2//
3// Permission is hereby granted, free of charge, to any person obtaining a copy of this
4// software and associated documentation files (the "Software"), to deal in the Software
5// without restriction, including without limitation the rights to use, copy, modify, merge,
6// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
7// to whom the Software is furnished to do so, subject to the following conditions:
8//
9// The above copyright notice and this permission notice shall be included in all copies or
10// substantial portions of the Software.
11//
12// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
13// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
15// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
16// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
17// DEALINGS IN THE SOFTWARE.
18
19using System;
20using System.Collections.Generic;
21using System.Linq;
22using System.Text;
23using System.Text.RegularExpressions;
24using System.Windows.Documents;
25using ICSharpCode.AvalonEdit.Document;
26using ICSharpCode.NRefactory.Editor;
27
28namespace ICSharpCode.AvalonEdit.Search
29{
30  class RegexSearchStrategy : ISearchStrategy
31  {
32    readonly Regex searchPattern;
33    readonly bool matchWholeWords;
34   
35    public RegexSearchStrategy(Regex searchPattern, bool matchWholeWords)
36    {
37      if (searchPattern == null)
38        throw new ArgumentNullException("searchPattern");
39      this.searchPattern = searchPattern;
40      this.matchWholeWords = matchWholeWords;
41    }
42   
43    public IEnumerable<ISearchResult> FindAll(ITextSource document, int offset, int length)
44    {
45      int endOffset = offset + length;
46      foreach (Match result in searchPattern.Matches(document.Text)) {
47        int resultEndOffset = result.Length + result.Index;
48        if (offset > result.Index || endOffset < resultEndOffset)
49          continue;
50        if (matchWholeWords && (!IsWordBorder(document, result.Index) || !IsWordBorder(document, resultEndOffset)))
51          continue;
52        yield return new SearchResult { StartOffset = result.Index, Length = result.Length, Data = result };
53      }
54    }
55   
56    static bool IsWordBorder(ITextSource document, int offset)
57    {
58      return TextUtilities.GetNextCaretPosition(document, offset - 1, LogicalDirection.Forward, CaretPositioningMode.WordBorder) == offset;
59    }
60   
61    public ISearchResult FindNext(ITextSource document, int offset, int length)
62    {
63      return FindAll(document, offset, length).FirstOrDefault();
64    }
65   
66    public bool Equals(ISearchStrategy other)
67    {
68      var strategy = other as RegexSearchStrategy;
69      return strategy != null &&
70        strategy.searchPattern.ToString() == searchPattern.ToString() &&
71        strategy.searchPattern.Options == searchPattern.Options &&
72        strategy.searchPattern.RightToLeft == searchPattern.RightToLeft;
73    }
74  }
75 
76  class SearchResult : TextSegment, ISearchResult
77  {
78    public Match Data { get; set; }
79   
80    public string ReplaceWith(string replacement)
81    {
82      return Data.Result(replacement);
83    }
84  }
85}
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