1 files changed, 58 insertions, 0 deletions
diff --git a/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Actions/ActionLog.cs b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Actions/ActionLog.cs
new file mode 100644
index 00000000..666c9020
--- /dev/null
+++ b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Actions/ActionLog.cs
@@ -0,0 +1,58 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+
+using System.Collections.Generic;
+
+namespace AmplifyShaderEditor
+{
+    public class ActionLog
+    {
+        private int m_maxCount;
+        private int m_index;
+        private List<ActionData> m_sequence;
+
+        public ActionLog(int maxCount)
+        {
+            m_maxCount = maxCount;
+            m_index = 0;
+            m_sequence = new List<ActionData>();
+        }
+
+        public void AddToLog(ActionData actionData)
+        {
+            if (m_sequence.Count > m_maxCount)
+            {
+                m_sequence.RemoveAt(0);
+            }
+
+            m_sequence.Add(actionData);
+            m_index = m_sequence.Count - 1;
+        }
+
+
+        public void UndoLastAction()
+        {
+            if ( m_index > -1 && m_index < m_sequence.Count )
+                m_sequence[m_index--].ExecuteReverse();
+        }
+
+        public void RedoLastAction()
+        {
+            if (m_index < (m_sequence.Count - 1))
+                m_sequence[++m_index].ExecuteForward();
+            
+        }
+
+        public void ClearLog()
+        {
+            m_sequence.Clear();
+            m_index = 0;
+        }
+
+        public void Destroy()
+        {
+            m_sequence.Clear();
+            m_sequence = null;
+        }
+    }
+}