From 1fb54b074c243bab1964b4a568d672e87d18655f Mon Sep 17 00:00:00 2001
From: Teravus Ovares
Date: Mon, 28 Apr 2008 01:48:21 +0000
Subject: * Added basic 3-5 level undo on prim position/rotation/scale. * In
the future this should be a config option... and, hopefully this tides the
builders over for a little while.
---
OpenSim/Framework/IClientAPI.cs | 2 +
OpenSim/Framework/UndoStack.cs | 128 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 130 insertions(+)
create mode 100644 OpenSim/Framework/UndoStack.cs
(limited to 'OpenSim/Framework')
diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index fb32397..985e085 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -570,6 +570,8 @@ namespace OpenSim.Framework
event UUIDNameRequest OnTeleportHomeRequest;
event ScriptAnswer OnScriptAnswer;
+
+ event AgentSit OnUndo;
LLVector3 StartPos { get; set; }
diff --git a/OpenSim/Framework/UndoStack.cs b/OpenSim/Framework/UndoStack.cs
new file mode 100644
index 0000000..0b97644
--- /dev/null
+++ b/OpenSim/Framework/UndoStack.cs
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the OpenSim Project nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OpenSim.Framework
+{
+ ///
+ /// Undo stack. Deletes entries beyond a certain capacity
+ ///
+ ///
+ [Serializable]
+ public class UndoStack
+ {
+
+ private int m_new = 1;
+ private int m_old = 0;
+ private T[] m_Undos;
+
+ public bool IsFull
+ {
+ get
+ {
+ return m_new == m_old;
+ }
+ }
+
+
+ public int Capacity
+ {
+ get
+ {
+ return m_Undos.Length - 1;
+ }
+ }
+
+
+ public UndoStack(int capacity)
+ {
+ m_Undos = new T[capacity + 1];
+ }
+
+ public void Push(T item)
+ {
+ if (IsFull)
+ {
+ m_old++;
+ if (m_old >= m_Undos.Length)
+ m_old -= m_Undos.Length;
+ }
+ if (++m_new >= m_Undos.Length)
+ m_new -= m_Undos.Length;
+ m_Undos[m_new] = item;
+ }
+
+ public T Pop()
+ {
+ if (Count > 0)
+ {
+ T deleted = m_Undos[m_new];
+ m_Undos[m_new--] = default(T);
+ if (m_new < 0)
+ m_new += m_Undos.Length;
+ return deleted;
+ }
+ else
+ throw new InvalidOperationException("Cannot pop from emtpy stack");
+ }
+
+ public int Count
+ {
+ get
+ {
+ int count = m_new - m_old - 1;
+ if (count < 0)
+ count += m_Undos.Length;
+ return count;
+ }
+ }
+
+
+ public T Peek()
+ {
+ return m_Undos[m_new];
+ }
+
+
+ public void Clear()
+ {
+ if (Count > 0)
+ {
+ for (int i = 0; i < m_Undos.Length; i++)
+ {
+ m_Undos[i] = default(T);
+ }
+ m_new = 1;
+ m_old = 0;
+ }
+ }
+
+ }
+}
\ No newline at end of file
--
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