netpoet coop and 64kode

netpoet-coop-8k/src/tool/Actions/SyncEditAction.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using tool.ViewModels;
+
+namespace tool.Actions
+{
+    public class SyncEditAction : IUndoItem
+    {
+        public SyncEditAction(IUndoContext _context)
+        {
+            Context = _context;
+            m_OldDataStream = new MemoryStream();
+            m_OldDataWriter = new StreamWriter(m_OldDataStream);
+            m_OldDataReader = new StreamReader(m_OldDataStream);
+            ((SyncViewModel)Context).Save(m_OldDataWriter);
+        }
+
+        public bool CanRedo {  get { return true; } }
+
+        public bool CanUndo { get { return true; } }
+
+        public IUndoContext Context
+        {
+            get;
+            private set;
+        }
+
+        public string Description { get { return "Edit cell value"; } }
+
+        public void Redo()
+        {
+            if (m_NewDataStream == null)
+            {
+                m_NewDataStream = new MemoryStream();
+                m_NewDataWriter = new StreamWriter(m_OldDataStream);
+                m_NewDataReader = new StreamReader(m_OldDataStream);
+                ((SyncViewModel)Context).Save(m_NewDataWriter);
+            }
+            else
+            {
+                ((SyncViewModel)Context).Load(m_NewDataReader);
+            }
+        }
+
+        public void Undo()
+        {
+            ((SyncViewModel)Context).Load(m_OldDataReader);
+        }
+
+        private MemoryStream m_OldDataStream;
+        private MemoryStream m_NewDataStream;
+        private StreamWriter m_OldDataWriter;
+        private StreamWriter m_NewDataWriter;
+        private StreamReader m_OldDataReader;
+        private StreamReader m_NewDataReader;
+    }
+}