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source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/Document/UndoOperationGroup.cs @ 11700

Last change on this file since 11700 was 11700, checked in by jkarder, 9 years ago

#2077: created branch and added first version

File size: 2.3 KB
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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.Diagnostics;
21using ICSharpCode.AvalonEdit.Utils;
22
23namespace ICSharpCode.AvalonEdit.Document
24{
25  /// <summary>
26  /// This class stacks the last x operations from the undostack and makes
27  /// one undo/redo operation from it.
28  /// </summary>
29  sealed class UndoOperationGroup : IUndoableOperationWithContext
30  {
31    IUndoableOperation[] undolist;
32   
33    public UndoOperationGroup(Deque<IUndoableOperation> stack, int numops)
34    {
35      if (stack == null)  {
36        throw new ArgumentNullException("stack");
37      }
38     
39      Debug.Assert(numops > 0 , "UndoOperationGroup : numops should be > 0");
40      Debug.Assert(numops <= stack.Count);
41     
42      undolist = new IUndoableOperation[numops];
43      for (int i = 0; i < numops; ++i) {
44        undolist[i] = stack.PopBack();
45      }
46    }
47   
48    public void Undo()
49    {
50      for (int i = 0; i < undolist.Length; ++i) {
51        undolist[i].Undo();
52      }
53    }
54   
55    public void Undo(UndoStack stack)
56    {
57      for (int i = 0; i < undolist.Length; ++i) {
58        stack.RunUndo(undolist[i]);
59      }
60    }
61   
62    public void Redo()
63    {
64      for (int i = undolist.Length - 1; i >= 0; --i) {
65        undolist[i].Redo();
66      }
67    }
68   
69    public void Redo(UndoStack stack)
70    {
71      for (int i = undolist.Length - 1; i >= 0; --i) {
72        stack.RunRedo(undolist[i]);
73      }
74    }
75  }
76}
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