54 lines
1.2 KiB
C#
54 lines
1.2 KiB
C#
// <file>
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// <copyright see="prj:///doc/copyright.txt"/>
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// <license see="prj:///doc/license.txt"/>
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// <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
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// <version>$Revision$</version>
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// </file>
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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namespace ICSharpCode.TextEditor.Undo
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{
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/// <summary>
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/// This class stacks the last x operations from the undostack and makes
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/// one undo/redo operation from it.
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/// </summary>
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internal sealed class UndoQueue : IUndoableOperation
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{
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List<IUndoableOperation> undolist = new List<IUndoableOperation>();
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/// <summary>
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/// </summary>
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public UndoQueue(Stack<IUndoableOperation> stack, int numops)
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{
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if (stack == null) {
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throw new ArgumentNullException("stack");
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}
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Debug.Assert(numops > 0 , "ICSharpCode.TextEditor.Undo.UndoQueue : numops should be > 0");
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if (numops > stack.Count) {
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numops = stack.Count;
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}
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for (int i = 0; i < numops; ++i) {
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undolist.Add(stack.Pop());
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}
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}
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public void Undo()
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{
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for (int i = 0; i < undolist.Count; ++i) {
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undolist[i].Undo();
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}
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}
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public void Redo()
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{
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for (int i = undolist.Count - 1 ; i >= 0 ; --i) {
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undolist[i].Redo();
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}
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}
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}
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}
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