Go back from Webkit to IE render engine

QuickLook.Plugin/QuickLook.Plugin.HtmlViewer/Helper.cs

@@ -0,0 +1,50 @@
+using System.IO;
+using System.Text;
+using Microsoft.Win32;
+
+namespace QuickLook.Plugin.HtmlViewer
+{
+    internal static class Helper
+    {
+        public static string FilePathToFileUrl(string filePath)
+        {
+            var uri = new StringBuilder();
+            foreach (var v in filePath)
+                if (v >= 'a' && v <= 'z' || v >= 'A' && v <= 'Z' || v >= '0' && v <= '9' ||
+                    v == '+' || v == '/' || v == ':' || v == '.' || v == '-' || v == '_' || v == '~' ||
+                    v > '\xFF')
+                    uri.Append(v);
+                else if (v == Path.DirectorySeparatorChar || v == Path.AltDirectorySeparatorChar)
+                    uri.Append('/');
+                else
+                    uri.Append($"%{(int) v:X2}");
+            if (uri.Length >= 2 && uri[0] == '/' && uri[1] == '/') // UNC path
+                uri.Insert(0, "file:");
+            else
+                uri.Insert(0, "file:///");
+            return uri.ToString();
+        }
+
+        public static void SetBrowserFeatureControl()
+        {
+            var exeName = Path.GetFileName(App.AppFullPath);
+
+            // use latest engine
+            SetBrowserFeatureControlKey("FEATURE_BROWSER_EMULATION", exeName, 0);
+            //
+            SetBrowserFeatureControlKey("FEATURE_GPU_RENDERING", exeName, 0);
+            // turn on hi-dpi mode
+            SetBrowserFeatureControlKey("FEATURE_96DPI_PIXEL", exeName, 1);
+        }
+
+        private static void SetBrowserFeatureControlKey(string feature, string appName, uint value)
+        {
+            using (var key = Registry.CurrentUser.CreateSubKey(
+                string.Concat(@"Software\Microsoft\Internet Explorer\Main\FeatureControl\", feature),
+                RegistryKeyPermissionCheck.ReadWriteSubTree))
+            {
+                key?.SetValue(appName, value, RegistryValueKind.DWord);
+            }
+        }
+    }
+}