Databinding for plugin tab + faster image load

Wox.Infrastructure/Image/ImageCache.cs

@@ -20,7 +20,10 @@ namespace Wox.Infrastructure.Image
             {
                 TopUsedImages[path] = 1;
             }
+        }
 
+        public void Cleanup()
+        {
             if (TopUsedImages.Count > MaxCached)
             {
                 var images = TopUsedImages.OrderByDescending(o => o.Value)

Wox.Infrastructure/Image/ImageLoader.cs

@@ -43,6 +43,7 @@ namespace Wox.Infrastructure.Image
 
         public static void Save()
         {
+            _cache.Cleanup();
             _storage.Save();
         }
 
@@ -115,11 +116,6 @@ namespace Wox.Infrastructure.Image
                         var img = Load(i.Key);
                         if (img != null)
                         {
-                            // todo happlebao magic
-                            // the image created on other threads can be accessed from main ui thread,
-                            // this line made it possible
-                            // should be changed the Dispatcher.InvokeAsync in the future
-                            img.Freeze();
                             ImageSources[i.Key] = img;
                         }
                     });
@@ -185,9 +181,9 @@ namespace Wox.Infrastructure.Image
                         path = ErrorIcon;
                     }
                 }
-
                 ImageSources[path] = image;
                 _cache.Add(path);
+                image.Freeze();
             }
             return image;
         }

Wox.Infrastructure/Image/ImagePathConverter.cs

@@ -1,25 +0,0 @@
-using System;
-using System.Globalization;
-using System.Windows;
-using System.Windows.Data;
-
-namespace Wox.Infrastructure.Image
-{
-    public class ImagePathConverter : IValueConverter
-    {
-        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            if (value == null || value == DependencyProperty.UnsetValue)
-            {
-                return null;
-            }
-            var image = ImageLoader.Load(value.ToString());
-            return image;
-        }
-
-        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
-        {
-            return null;
-        }
-    }
-}

Wox.Infrastructure/Wox.Infrastructure.csproj

@@ -78,7 +78,6 @@
     <Compile Include="Hotkey\KeyEvent.cs" />
     <Compile Include="Image\ImageCache.cs" />
     <Compile Include="Image\ImageLoader.cs" />
-    <Compile Include="Image\ImagePathConverter.cs" />
     <Compile Include="Logger\Log.cs" />
     <Compile Include="Storage\ISavable.cs" />
     <Compile Include="Storage\PluginJsonStorage.cs" />