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-rw-r--r--OpenSim/Framework/UndoStack.cs152
-rw-r--r--OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs2
2 files changed, 1 insertions, 153 deletions
diff --git a/OpenSim/Framework/UndoStack.cs b/OpenSim/Framework/UndoStack.cs
deleted file mode 100644
index 8f8849d..0000000
--- a/OpenSim/Framework/UndoStack.cs
+++ /dev/null
@@ -1,152 +0,0 @@
1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29
30namespace OpenSim.Framework
31{
32 /// <summary>
33 /// Undo stack. Deletes entries beyond a certain capacity
34 /// </summary>
35 /// <typeparam name="T"></typeparam>
36 [Serializable]
37 public class UndoStack<T>
38 {
39 private int m_new = 1;
40 private int m_old = 0;
41 private T[] m_Undos;
42
43 public UndoStack(int capacity)
44 {
45 m_Undos = new T[capacity + 1];
46 }
47
48 /// <summary>
49 /// Is the stack full?
50 /// </summary>
51 public bool IsFull
52 {
53 get
54 {
55 // If the old and new pointers are in the same place then all stack slots are occupied.
56 return m_new == m_old;
57 }
58 }
59
60 /// <summary>
61 /// Capacity of the stack.
62 /// </summary>
63 public int Capacity
64 {
65 get { return m_Undos.Length - 1; }
66 }
67
68 /// <summary>
69 /// Return the number of undos on the stack.
70 /// </summary>
71 public int Count
72 {
73 get
74 {
75 int count = m_new - m_old - 1;
76
77 if (count < 0)
78 count += m_Undos.Length;
79
80 return count;
81 }
82 }
83
84 /// <summary>
85 /// Push a new undo onto the stack.
86 /// </summary>
87 /// <param name="item"></param>
88 public void Push(T item)
89 {
90 if (IsFull)
91 {
92 m_old++;
93
94 if (m_old >= m_Undos.Length)
95 m_old -= m_Undos.Length;
96 }
97
98 if (++m_new >= m_Undos.Length)
99 m_new -= m_Undos.Length;
100
101 m_Undos[m_new] = item;
102 }
103
104 /// <summary>
105 /// Pop and item from the top of the undo stack.
106 /// </summary>
107 /// <returns></returns>
108 public T Pop()
109 {
110 if (Count > 0)
111 {
112 T deleted = m_Undos[m_new];
113 m_Undos[m_new--] = default(T);
114
115 if (m_new < 0)
116 m_new += m_Undos.Length;
117
118 return deleted;
119 }
120 else
121 {
122 throw new InvalidOperationException("Cannot pop from empty stack");
123 }
124 }
125
126 /// <summary>
127 /// Peek at the undo on the top of the stack.
128 /// </summary>
129 /// <returns></returns>
130 public T Peek()
131 {
132 return m_Undos[m_new];
133 }
134
135 /// <summary>
136 /// Clear the stack.
137 /// </summary>
138 public void Clear()
139 {
140 if (Count > 0)
141 {
142 for (int i = 0; i < m_Undos.Length; i++)
143 {
144 m_Undos[i] = default(T);
145 }
146
147 m_new = 1;
148 m_old = 0;
149 }
150 }
151 }
152}
diff --git a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
index 9c7b2fa..c832520 100644
--- a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
@@ -84,7 +84,7 @@ namespace OpenSim.Region.CoreModules.World.Terrain
84 private ITerrainChannel m_revert; 84 private ITerrainChannel m_revert;
85 private Scene m_scene; 85 private Scene m_scene;
86 private volatile bool m_tainted; 86 private volatile bool m_tainted;
87 private readonly UndoStack<LandUndoState> m_undo = new UndoStack<LandUndoState>(5); 87 private readonly Stack<LandUndoState> m_undo = new Stack<LandUndoState>(5);
88 88
89 #region ICommandableModule Members 89 #region ICommandableModule Members
90 90
generated by cgit v1.1 at 2024-11-09 06:40:27 +0000