File indexing completed on 2024-06-23 08:56:30

0001 /**
0002  * KDiff3 - Text Diff And Merge Tool
0003  *
0004  * SPDX-FileCopyrightText: 2023 Michael Reeves <reeves.87@gmail.com>
0005  * SPDX-License-Identifier: GPL-2.0-or-later
0006  *
0007  */
0008 
0009 #ifndef UNDORECORD_H
0010 #define UNDORECORD_H
0011 
0012 #include "MergeEditLine.h"
0013 #include "selection.h"
0014 
0015 #include <deque>
0016 
0017 class UndoRecord
0018 {
0019   public:
0020     UndoRecord(Selection sel, MergeBlockList::iterator start)
0021     {
0022         mSel = sel;
0023         mEnd = mStart = start;
0024     };
0025 
0026     void push(const MergeBlock& mb) { savedLines.push_back(mb); }
0027     void push(const MergeBlock&& mb)
0028     {
0029         savedLines.push_back(mb);
0030         ++mEnd;
0031     }
0032 
0033     const MergeBlock& pop()
0034     {
0035         const MergeBlock& mb = savedLines.front();
0036         savedLines.pop_front();
0037         return mb;
0038     }
0039 
0040     void undo()
0041     {
0042         std::deque<MergeBlock>::iterator savedRec = savedLines.begin();
0043         for(MergeBlockList::iterator it = mStart; it == mEnd; it++)
0044         {
0045             std::swap(*it, *savedRec);
0046             savedRec++;
0047         }
0048     }
0049 
0050   private:
0051     MergeBlockList::iterator mStart, mEnd;
0052     Selection mSel;
0053     std::deque<MergeBlock> savedLines;
0054 };
0055 
0056 #endif /* UNDORECORD_H */