From 739a808654af12ae1ca881c99711fa7a7b7804f7 Mon Sep 17 00:00:00 2001
From: alcexhim <alcexhim@gmail.com>
Date: Wed, 4 Jun 2014 20:18:25 -0400
Subject: [PATCH] Added DataFormat for TXB/CTB text files

---
 .../DataFormats/Text/Descent/TXBDataFormat.cs | 80 +++++++++++++++++++
 .../UniversalEditor.Plugins.Descent.csproj    |  1 +
 2 files changed, 81 insertions(+)
 create mode 100644 CSharp/Plugins/UniversalEditor.Plugins.Descent/DataFormats/Text/Descent/TXBDataFormat.cs

diff --git a/CSharp/Plugins/UniversalEditor.Plugins.Descent/DataFormats/Text/Descent/TXBDataFormat.cs b/CSharp/Plugins/UniversalEditor.Plugins.Descent/DataFormats/Text/Descent/TXBDataFormat.cs
new file mode 100644
index 00000000..d80c52b3
--- /dev/null
+++ b/CSharp/Plugins/UniversalEditor.Plugins.Descent/DataFormats/Text/Descent/TXBDataFormat.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UniversalEditor.IO;
+using UniversalEditor.ObjectModels.Text.Plain;
+
+namespace UniversalEditor.DataFormats.Text.Descent
+{
+    public class TXBDataFormat : DataFormat
+    {
+        private static DataFormatReference _dfr = null;
+        public override DataFormatReference MakeReference()
+        {
+            if (_dfr == null)
+            {
+                _dfr = base.MakeReference();
+                _dfr.Capabilities.Add(typeof(PlainTextObjectModel), DataFormatCapabilities.All);
+                _dfr.Filters.Add("Descent encrypted text file", new string[] { "*.txb", "*.ctb" });
+            }
+            return _dfr;
+        }
+
+        protected override void LoadInternal(ref ObjectModel objectModel)
+        {
+            PlainTextObjectModel text = (objectModel as PlainTextObjectModel);
+            if (text == null) throw new ObjectModelNotSupportedException();
+
+            Reader reader = base.Accessor.Reader;
+            StringBuilder sb = new StringBuilder();
+            byte[] data = reader.ReadToEnd();
+            for (int i = 0; i < data.Length; i++)
+            {
+                if (data[i] != 0x0D)
+                {
+                    if (data[i] == 0x0A)
+                    {
+                        sb.Append((char)0x0D);
+                        sb.Append((char)0x0A);
+                    }
+                    else
+                    {
+                        char decchar = (char)data[i];
+                        char encchar = (char)((((decchar & 0x3F) << 2) + ((decchar & 0xC0) >> 6)) ^ 0xA7);
+                        sb.Append(encchar);
+                    }
+                }
+            }
+
+            text.Text = sb.ToString();
+        }
+
+        protected override void SaveInternal(ObjectModel objectModel)
+        {
+            PlainTextObjectModel text = (objectModel as PlainTextObjectModel);
+            if (text == null) throw new ObjectModelNotSupportedException();
+
+            Writer writer = base.Accessor.Writer;
+            char[] txt = text.Text.ToCharArray();
+            for (int i = 0; i < txt.Length; i++)
+            {
+                if (txt[i] != 0x0D)
+                {
+                    if (txt[i] == 0x0A)
+                    {
+                        writer.WriteChar((char)0x0D);
+                        writer.WriteChar((char)0x0A);
+                    }
+                    else
+                    {
+                        char decchar = (char)txt[i];
+                        char encchar = (char)((((decchar & 0xFC) >> 2) + ((decchar & 0x03) << 6)) ^ 0xE9);
+                        writer.WriteChar(encchar);
+                    }
+                }
+            }
+            writer.Flush();
+        }
+    }
+}
diff --git a/CSharp/Plugins/UniversalEditor.Plugins.Descent/UniversalEditor.Plugins.Descent.csproj b/CSharp/Plugins/UniversalEditor.Plugins.Descent/UniversalEditor.Plugins.Descent.csproj
index 96f72012..73db7db2 100644
--- a/CSharp/Plugins/UniversalEditor.Plugins.Descent/UniversalEditor.Plugins.Descent.csproj
+++ b/CSharp/Plugins/UniversalEditor.Plugins.Descent/UniversalEditor.Plugins.Descent.csproj
@@ -36,6 +36,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DataFormats\FileSystem\Descent\DescentHOGDataFormat.cs" />
+    <Compile Include="DataFormats\Text\Descent\TXBDataFormat.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>