88 lines
1.6 KiB
C#
88 lines
1.6 KiB
C#
using System.Collections.Generic;
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using System.Linq;
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namespace BizHawk.MultiClient
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{
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public class WatchHistory
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{
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private List<List<RamSearchEngine.IMiniWatch>> _history = new List<List<RamSearchEngine.IMiniWatch>>();
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private int curPos; //1-based
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public bool Enabled { get; private set; }
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public WatchHistory(bool enabled)
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{
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Enabled = enabled;
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}
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public WatchHistory(List<RamSearchEngine.IMiniWatch> newState, bool enabled)
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{
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AddState(newState);
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Enabled = enabled;
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}
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public void Clear()
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{
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_history = new List<List<RamSearchEngine.IMiniWatch>>();
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curPos = 0;
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}
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public bool CanUndo
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{
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get { return Enabled && curPos > 1; }
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}
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public bool CanRedo
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{
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get { return Enabled && curPos < _history.Count; }
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}
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public bool HasHistory
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{
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get { return Enabled && _history.Any(); }
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}
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public void AddState(List<RamSearchEngine.IMiniWatch> newState)
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{
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if (Enabled)
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{
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if (curPos < _history.Count)
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{
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for (int i = curPos + 1; i <= _history.Count; i++)
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{
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_history.Remove(_history[i - 1]);
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}
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}
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_history.Add(newState);
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curPos = _history.Count;
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}
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}
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public List<RamSearchEngine.IMiniWatch> Undo()
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{
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if (CanUndo && Enabled)
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{
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curPos--;
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return _history[curPos - 1];
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}
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else
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{
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return null;
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}
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}
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public List<RamSearchEngine.IMiniWatch> Redo()
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{
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if (CanRedo && Enabled)
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{
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curPos++;
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return _history[curPos - 1];
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}
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else
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{
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return null;
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}
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}
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}
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}
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