Refactoring directory path for UI resource

Wox.Core/Resource/ResourceMerger.cs

@@ -0,0 +1,48 @@
+using System;
+using System.IO;
+using System.Linq;
+using System.Windows;
+using Wox.Core.i18n;
+using Wox.Core.Plugin;
+using Wox.Plugin;
+
+namespace Wox.Core.UI
+{
+    public static class ResourceMerger
+    {
+        private static void RemoveResource(string directoryName)
+        {
+            directoryName = $"{Path.DirectorySeparatorChar}{directoryName}";
+            var dictionaries = Application.Current.Resources.MergedDictionaries;
+            foreach (var resource in dictionaries)
+            {
+                string currentDirectoryName = Path.GetDirectoryName(resource.Source.AbsolutePath);
+                if (currentDirectoryName == directoryName)
+                {
+                    dictionaries.Remove(resource);
+                    break;
+                }
+            }
+        }
+
+        public static void UpdateResource<T>(T t) where T : Resource
+        {
+            RemoveResource(t.DirectoryName);
+            Application.Current.Resources.MergedDictionaries.Add(t.GetResourceDictionary());
+        }
+
+        internal static void UpdatePluginLanguages()
+        {
+            RemoveResource(PluginManager.DirectoryName);
+            foreach (var languageFile in PluginManager.GetPluginsForInterface<IPluginI18n>().
+                Select(plugin => InternationalizationManager.Instance.GetLanguageFile(((IPluginI18n)plugin.Plugin).GetLanguagesFolder())).
+                Where(file => !string.IsNullOrEmpty(file)))
+            {
+                Application.Current.Resources.MergedDictionaries.Add(new ResourceDictionary
+                {
+                    Source = new Uri(languageFile, UriKind.Absolute)
+                });
+            }
+        }
+    }
+}