Refactoring blur

1. Refactoring blur, see discussion in : 7f8bb80
2. Releated issue: #330

Wox.Core/Plugin/PluginManager.cs

@@ -79,7 +79,7 @@ namespace Wox.Core.Plugin
                 Concat(new JsonRPCPluginLoader<PythonPlugin>().LoadPlugin(metadatas));
 
             //load plugin i18n languages
-            ResourceMerger.ApplyPluginLanguages();
+            ResourceMerger.UpdatePluginLanguages();
 
             foreach (PluginPair pluginPair in AllPlugins)
             {

Wox.Core/Theme/ITheme.cs

@@ -1,10 +0,0 @@
-using System.Collections.Generic;
-
-namespace Wox.Core.Theme
-{
-    interface ITheme
-    {
-        void ChangeTheme(string themeName);
-        List<string> LoadAvailableThemes();
-    }
-}

Wox.Core/Theme/Theme.cs

@@ -3,8 +3,10 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
+using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Interop;
 using System.Windows.Media;
 using Wox.Core.UI;
 using Wox.Core.UserSettings;
@@ -12,7 +14,7 @@ using Wox.Infrastructure.Logger;
 
 namespace Wox.Core.Theme
 {
-    public class Theme : IUIResource,ITheme
+    public class Theme : IUIResource
     {
         public const string DirectoryName = "Themes";
         private static List<string> themeDirectories = new List<string>();
@@ -53,11 +55,21 @@ namespace Wox.Core.Theme
                 }
             }
 
-            ResourceMerger.ApplyThemeResource(this);
-
             UserSettingStorage.Instance.Theme = themeName;
-            UserSettingStorage.Instance.ThemeBlurEnabled = (bool)Application.Current.Resources["ThemeBlurEnabled"];
             UserSettingStorage.Instance.Save();
+            ResourceMerger.UpdateResource(this);
+
+            try
+            {
+                var isBlur = Application.Current.FindResource("ThemeBlurEnabled");
+                if (isBlur is bool)
+                {
+                    SetBlurForWindow(Application.Current.MainWindow, (bool)isBlur);
+                }
+            }
+            catch (ResourceReferenceKeyNotFoundException e)
+            {
+            }
         }
 
         public ResourceDictionary GetResourceDictionary()
@@ -119,5 +131,74 @@ namespace Wox.Core.Theme
 
             return string.Empty;
         }
+
+        #region Blur Handling
+        /*
+        Found on https://github.com/riverar/sample-win10-aeroglass
+        */
+        public enum AccentState
+        {
+            ACCENT_DISABLED = 0,
+            ACCENT_ENABLE_GRADIENT = 1,
+            ACCENT_ENABLE_TRANSPARENTGRADIENT = 2,
+            ACCENT_ENABLE_BLURBEHIND = 3,
+            ACCENT_INVALID_STATE = 4
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct AccentPolicy
+        {
+            public AccentState AccentState;
+            public int AccentFlags;
+            public int GradientColor;
+            public int AnimationId;
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct WindowCompositionAttributeData
+        {
+            public WindowCompositionAttribute Attribute;
+            public IntPtr Data;
+            public int SizeOfData;
+        }
+
+        internal enum WindowCompositionAttribute
+        {
+            WCA_ACCENT_POLICY = 19
+        }
+        [DllImport("user32.dll")]
+        private static extern int SetWindowCompositionAttribute(IntPtr hwnd, ref WindowCompositionAttributeData data);
+
+        /// <summary>
+        /// Sets the blur for a window via SetWindowCompositionAttribute
+        /// </summary>
+        /// <param name="wind">window to blur</param>
+        /// <param name="status">true/false - on or off correspondingly</param>
+        public void SetBlurForWindow(Window wind, bool status)
+        {
+            SetWindowAccent(wind, status ? AccentState.ACCENT_ENABLE_BLURBEHIND : AccentState.ACCENT_DISABLED);
+        }
+
+        private void SetWindowAccent(Window wind, AccentState themeAccentMode)
+        {
+            var windowHelper = new WindowInteropHelper(wind);
+            var accent = new AccentPolicy { AccentState = themeAccentMode };
+            var accentStructSize = Marshal.SizeOf(accent);
+
+            var accentPtr = Marshal.AllocHGlobal(accentStructSize);
+            Marshal.StructureToPtr(accent, accentPtr, false);
+
+            var data = new WindowCompositionAttributeData
+            {
+                Attribute = WindowCompositionAttribute.WCA_ACCENT_POLICY,
+                SizeOfData = accentStructSize,
+                Data = accentPtr
+            };
+
+            SetWindowCompositionAttribute(windowHelper.Handle, ref data);
+
+            Marshal.FreeHGlobal(accentPtr);
+        }
+        #endregion
     }
 }

Wox.Core/UI/ResourceMerger.cs

@@ -1,4 +1,5 @@
 using System;
+using System.IO;
 using System.Linq;
 using System.Windows;
 using Wox.Core.i18n;
@@ -9,34 +10,34 @@ namespace Wox.Core.UI
 {
     public static class ResourceMerger
     {
-        private static void RemoveResource(string resourceDirectoryName)
+        private static void RemoveResource(string directoryName)
         {
-            var mergedDictionaries = Application.Current.Resources.MergedDictionaries;
-            foreach (var resource in mergedDictionaries)
+            directoryName = $"{Path.DirectorySeparatorChar}{directoryName}";
+            var dictionaries = Application.Current.Resources.MergedDictionaries;
+            foreach (var resource in dictionaries)
             {
-                int directoryPosition = resource.Source.Segments.Length - 2;
-                string currentDirectoryName = resource.Source.Segments[directoryPosition];
-                if (currentDirectoryName == resourceDirectoryName)
+                string currentDirectoryName = Path.GetDirectoryName(resource.Source.AbsolutePath);
+                if (currentDirectoryName == directoryName)
                 {
-                    mergedDictionaries.Remove(resource);
+                    dictionaries.Remove(resource);
                     break;
                 }
             }
         }
 
-        public static void ApplyThemeResource(Theme.Theme t)
+        public static void UpdateResource(Theme.Theme t)
         {
             RemoveResource(Theme.Theme.DirectoryName);
             Application.Current.Resources.MergedDictionaries.Add(t.GetResourceDictionary());
         }
 
-        public static void ApplyLanguageResources(Internationalization i)
+        public static void UpdateResources(Internationalization i)
         {
             RemoveResource(Internationalization.DirectoryName);
             Application.Current.Resources.MergedDictionaries.Add(i.GetResourceDictionary());
         }
 
-        internal static void ApplyPluginLanguages()
+        internal static void UpdatePluginLanguages()
         {
             RemoveResource(PluginManager.DirectoryName);
             foreach (var languageFile in PluginManager.GetPluginsForInterface<IPluginI18n>().

Wox.Core/UserSettings/UserSettingStorage.cs

@@ -55,9 +55,6 @@ namespace Wox.Core.UserSettings
         [JsonProperty]
         public string ResultItemFontStretch { get; set; }
 
-        [JsonProperty]
-        public bool ThemeBlurEnabled { get; set; }
-
         [JsonProperty]
         public double WindowLeft { get; set; }
 

Wox.Core/Wox.Core.csproj

@@ -69,7 +69,6 @@
     <Compile Include="i18n\Internationalization.cs" />
     <Compile Include="i18n\InternationalizationManager.cs" />
     <Compile Include="i18n\Language.cs" />
-    <Compile Include="Theme\ITheme.cs" />
     <Compile Include="Theme\ThemeManager.cs" />
     <Compile Include="UI\IUIResource.cs" />
     <Compile Include="UI\ResourceMerger.cs" />

Wox.Core/i18n/Internationalization.cs

@@ -70,7 +70,7 @@ namespace Wox.Core.i18n
 
             UserSettingStorage.Instance.Language = language.LanguageCode;
             UserSettingStorage.Instance.Save();
-            ResourceMerger.ApplyLanguageResources(this);
+            ResourceMerger.UpdateResources(this);
         }
 
         public ResourceDictionary GetResourceDictionary()