95 lines
2.2 KiB
C#
95 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace SpriteMapEditor.SpriteMapModifications
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{
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class History
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{
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private List<ISpriteMapModification> changes;
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private int position;
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public bool CanUndo
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{
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get { return position >= 0 && changes.Count > 0; }
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}
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public bool CanRedo
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{
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get { return position < changes.Count - 1; }
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}
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public History()
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{
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changes = new List<ISpriteMapModification>();
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}
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public void Add(ISpriteMapModification change)
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{
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if (position < changes.Count - 1)
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{
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changes.RemoveRange(position + 1, changes.Count - 1 - position);
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}
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changes.Add(change);
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position = changes.Count - 1;
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}
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public void Undo()
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{
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if (CanUndo)
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{
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changes[position].Undo();
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position--;
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}
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}
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public void Undo(ListBox listBox)
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{
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if (CanUndo)
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{
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Console.Write("Hist.Pos(" + position + "): ");
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ModHelper.UndoAndRestoreSelection(changes[position], listBox);
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position--;
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}
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}
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public void Redo()
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{
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if (CanRedo)
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{
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changes[position + 1].Do();
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position++;
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}
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}
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public void Redo(ListBox listBox)
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{
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if (CanRedo)
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{
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Console.Write("Hist.Pos(" + position + "): ");
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ModHelper.RedoAndRestoreSelection(changes[position + 1], listBox);
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position++;
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}
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}
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public string NextUndoString()
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{
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if (!CanUndo)
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return "Undo...";
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else
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return "Undo " + changes[position];
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}
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public string NextRedoString()
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{
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if (!CanRedo)
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return "Redo...";
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else
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return "Redo " + changes[position + 1];
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}
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}
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}
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