detect string encoding when previewing .zip files, fix #24.

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ArchiveInfoPanel.xaml.cs

@@ -101,7 +101,7 @@ namespace QuickLook.Plugin.ArchiveViewer
 
                 if (useReader.Any(i => path.EndsWith(i)))
                 {
-                    var reader = ReaderFactory.Open(stream);
+                    var reader = ReaderFactory.Open(stream, new ChardetReaderOptions());
 
                     _type = reader.ArchiveType.ToString();
 
@@ -113,7 +113,7 @@ namespace QuickLook.Plugin.ArchiveViewer
                 }
                 else
                 {
-                    var archive = ArchiveFactory.Open(stream);
+                    var archive = ArchiveFactory.Open(stream, new ChardetReaderOptions());
 
                     _type = archive.Type.ToString();
 
@@ -138,8 +138,7 @@ namespace QuickLook.Plugin.ArchiveViewer
                     if (_fileEntries.ContainsKey(f))
                         return;
 
-                    ArchiveFileEntry parent;
+                    _fileEntries.TryGetValue(GetDirectoryName(f), out ArchiveFileEntry parent);
-                    _fileEntries.TryGetValue(GetDirectoryName(f), out parent);
 
                     var afe = new ArchiveFileEntry(Path.GetFileName(f), true, parent);
 
@@ -151,8 +150,7 @@ namespace QuickLook.Plugin.ArchiveViewer
             {
                 var file = pf.Last();
 
-                ArchiveFileEntry parent;
+                _fileEntries.TryGetValue(GetDirectoryName(file), out ArchiveFileEntry parent);
-                _fileEntries.TryGetValue(GetDirectoryName(file), out parent);
 
                 _fileEntries.Add(file, new ArchiveFileEntry(Path.GetFileName(entry.Key), false, parent)
                 {

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/ChardetReaderOptions.cs

@@ -0,0 +1,47 @@
+// Copyright © 2017 Paddy Xu
+// 
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Text;
+using SharpCompress.Common;
+using SharpCompress.Readers;
+using UtfUnknown;
+
+namespace QuickLook.Plugin.ArchiveViewer
+{
+    internal class ChardetReaderOptions : ReaderOptions
+    {
+        public ChardetReaderOptions()
+        {
+            ArchiveEncoding = new ArchiveEncoding
+            {
+                CustomDecoder = Chardet
+            };
+        }
+
+        public string Chardet(byte[] bytes, int index, int count)
+        {
+            var buffer = new byte[count];
+
+            Array.Copy(bytes, index, buffer, 0, count);
+
+            var encoding = CharsetDetector.DetectFromBytes(buffer).Detected?.Encoding ?? Encoding.Default;
+
+            return encoding.GetString(buffer);
+        }
+    }
+}

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/QuickLook.Plugin.ArchiveViewer.csproj

@@ -52,13 +52,16 @@
   <ItemGroup>
     <Reference Include="PresentationCore" />
     <Reference Include="PresentationFramework" />
-    <Reference Include="SharpCompress, Version=0.17.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
+    <Reference Include="SharpCompress, Version=0.18.0.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
-      <HintPath>..\..\packages\SharpCompress.0.17.1\lib\net45\SharpCompress.dll</HintPath>
+      <HintPath>..\..\packages\SharpCompress.0.18.0\lib\net45\SharpCompress.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Drawing" />
     <Reference Include="System.Xaml" />
+    <Reference Include="UtfUnknown, Version=1.0.0.0, Culture=neutral, PublicKeyToken=90217ce7a23260d4, processorArchitecture=MSIL">
+      <HintPath>..\..\packages\UTF.Unknown.1.0.0-beta1\lib\net40\UtfUnknown.dll</HintPath>
+    </Reference>
     <Reference Include="WindowsBase" />
   </ItemGroup>
   <ItemGroup>
@@ -69,6 +72,7 @@
       <DependentUpon>ArchiveInfoPanel.xaml</DependentUpon>
     </Compile>
     <Compile Include="ArchiveFileEntry.cs" />
+    <Compile Include="ChardetReaderOptions.cs" />
     <Compile Include="IconManager.cs" />
     <Compile Include="Extensions.cs" />
     <Compile Include="Converters.cs" />

QuickLook.Plugin/QuickLook.Plugin.ArchiveViewer/packages.config

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="SharpCompress" version="0.17.1" targetFramework="net462" />
+  <package id="SharpCompress" version="0.18.0" targetFramework="net462" />
+  <package id="UTF.Unknown" version="1.0.0-beta1" targetFramework="net462" />
 </packages>