UndoableInsert.cs


0:	// UndoableInsert.cs
1:	// Copyright (c) 2000 Mike Krueger
2:	//
3:	// This program is free software; you can redistribute it and/or modify
4:	// it under the terms of the GNU General Public License as published by
5:	// the Free Software Foundation; either version 2 of the License, or
6:	// (at your option) any later version.
7:	//
8:	// This program is distributed in the hope that it will be useful,
9:	// but WITHOUT ANY WARRANTY; without even the implied warranty of
10:	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11:	// GNU General Public License for more details.
12:	//
13:	// You should have received a copy of the GNU General Public License
14:	// along with this program; if not, write to the Free Software
15:	// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16:
17:	using System;
18:	using System.Diagnostics;
19:	using System.Drawing;
20:
21:	using SharpDevelop.Internal.Text;
22:
23:	namespace SharpDevelop.Internal.Undo {
24:
25:	/// <summary>
26:	/// This class is for the undo of TextBuffer insert operations
27:	/// </summary>
28:	class UndoableInsert : IUndoableOperation
29:	{
30:	TextBuffer buffer;
31:	Point from, to;
32:	string text;
33:
34:	public UndoableInsert(TextBuffer buffer, Point from, Point to, string text)
35:	{
36:	if (buffer == null)
37:	throw new ArgumentNullException("UndoableInsert(TextBuffer buffer, Point from, Point to, string text) : buffer can't be null");
38:
39:	Debug.Assert(text != null, "SharpDevelop.Internal.Undo.UndoableInsert : text == null");
40:
41:	this.buffer = buffer;
42:	this.from = from;
43:	this.to = to;
44:	this.text = text;
45:	}
46:
47:	public void Undo()
48:	{
49:	buffer._Delete(from, to);
50:	}
51:
52:	public void Redo()
53:	{
54:	buffer._Insert(from, text);
55:	}
56:	}
57:	}
58: