source: branches/2994-AutoDiffForIntervals/HeuristicLab.CodeEditor/3.4/LanguageFeatures/CodeFolding/CSharp/CSharpCodeFoldingStrategy.cs @ 17209

Last change on this file since 17209 was 17209, checked in by gkronber, 6 weeks ago

#2994: merged r17132:17198 from trunk to branch

File size: 1.9 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System.Linq;
23using CSharpBinding.Parser;
24
25namespace HeuristicLab.CodeEditor {
26  internal class CSharpCodeFoldingStrategy : CodeFoldingStrategy {
27    public CSharpCodeFoldingStrategy(CodeEditor codeEditor) : base(codeEditor) { }
28
29    protected override CodeFoldingResult GetCodeFoldingResult(out int firstErrorOffset) {
30      var document = codeEditor.TextEditor.Document;
31      var result = new CodeFoldingResult();
32
33      try {
34        var foldingContext = new CSharpCodeFoldingContext(document);
35        var v = new FoldingVisitor();
36        v.document = foldingContext.Document;
37        foldingContext.SyntaxTree.AcceptVisitor(v);
38        result.FoldingData = v.foldings.OrderBy(x => x.StartOffset).ToList();
39
40        var firstError = foldingContext.SyntaxTree.Errors.FirstOrDefault();
41        firstErrorOffset = firstError != null
42          ? foldingContext.Document.GetOffset(firstError.Region.Begin)
43          : int.MaxValue;
44      } catch {
45        // ignore exceptions thrown during code folding
46        firstErrorOffset = int.MaxValue;
47      }
48
49      return result;
50    }
51  }
52}
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