annotate OrthancStone/Sources/Toolbox/UndoRedoStack.cpp @ 2079:bd67addab1a3

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 14 Aug 2023 10:19:11 +0200
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2023 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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24 #include "UndoRedoStack.h"
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25
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26 #include <OrthancException.h>
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28 #include <cassert>
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29
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30 namespace OrthancStone
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31 {
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32 void UndoRedoStack::Clear(UndoRedoStack::Stack::iterator from)
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33 {
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34 for (Stack::iterator it = from; it != stack_.end(); ++it)
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35 {
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36 assert(*it != NULL);
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37 delete *it;
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38 }
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39
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40 stack_.erase(from, stack_.end());
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41 }
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44 UndoRedoStack::UndoRedoStack() :
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45 current_(stack_.end())
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46 {
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47 }
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50 UndoRedoStack::~UndoRedoStack()
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51 {
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52 Clear(stack_.begin());
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53 }
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56 void UndoRedoStack::Add(ICommand* command)
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57 {
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58 if (command == NULL)
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59 {
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60 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer);
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61 }
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62
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63 Clear(current_);
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64
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65 stack_.push_back(command);
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66 current_ = stack_.end();
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67 }
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69
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70 void UndoRedoStack::Undo()
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71 {
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72 if (current_ != stack_.begin())
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73 {
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74 --current_;
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75
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76 assert(*current_ != NULL);
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77 (*current_)->Undo();
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78 }
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79 }
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80
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81 void UndoRedoStack::Redo()
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82 {
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83 if (current_ != stack_.end())
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84 {
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85 assert(*current_ != NULL);
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86 (*current_)->Redo();
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87
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88 ++current_;
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89 }
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90 }
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91 }