Minor fixes; Removed res scheme support

src/Avalonia.Visuals/Media/Fonts/FontFamilyKey.cs

@@ -19,18 +19,10 @@ namespace Avalonia.Media.Fonts
         {
             if (source.AbsolutePath.Contains(".ttf"))
             {
-                if (source.Scheme == "res")
-                {
-                    FileName = source.AbsolutePath.Split('/').Last();
-                    Location = new Uri(source.OriginalString.Replace("/" + FileName, ""), UriKind.RelativeOrAbsolute);
-                }
-                else
-                {
-                    var filePathWithoutExtension = source.AbsolutePath.Replace(".ttf", "");
-                    var fileNameWithoutExtension = filePathWithoutExtension.Split('.').Last();
-                    FileName = fileNameWithoutExtension + ".ttf";
-                    Location = new Uri(source.OriginalString.Replace("." + FileName, ""), UriKind.RelativeOrAbsolute);
-                }            
+                var filePathWithoutExtension = source.AbsolutePath.Replace(".ttf", "");
+                var fileNameWithoutExtension = filePathWithoutExtension.Split('.').Last();
+                FileName = fileNameWithoutExtension + ".ttf";
+                Location = new Uri(source.OriginalString.Replace("." + FileName, ""), UriKind.RelativeOrAbsolute);
             }
             else
             {
@@ -96,12 +88,7 @@ namespace Avalonia.Media.Fonts
         {
             if (FileName != null)
             {
-                if (Location.Scheme == "resm")
-                {
-                    return Location.AbsolutePath + "." + FileName;
-                }
-
-                return Location.AbsolutePath + "/" + FileName;
+                return Location.AbsolutePath + "." + FileName;
             }
 
             return Location.AbsolutePath;

src/Avalonia.Visuals/Media/Fonts/FontResourceLoader.cs

@@ -58,7 +58,9 @@ namespace Avalonia.Media.Fonts
         {
             var assembly = GetAssembly(location);
 
-            var locationPath = GetLocationPath(location);
+            if (assembly == null) return Enumerable.Empty<FontResource>();
+
+            var locationPath = location.AbsolutePath;
 
             var matchingResources = assembly.Resources.Where(x => x.Contains(locationPath));
 
@@ -76,7 +78,9 @@ namespace Avalonia.Media.Fonts
         {
             var assembly = GetAssembly(location);
 
-            var compareTo = GetLocationPath(location) + "." + fileName.Split('*').First();
+            if (assembly == null) return Enumerable.Empty<FontResource>();
+
+            var compareTo = location.AbsolutePath + "." + fileName.Split('*').First();
 
             var matchingResources = assembly.Resources.Where(x => x.Contains(compareTo));
 
@@ -94,20 +98,6 @@ namespace Avalonia.Media.Fonts
             return new Uri("resm:" + path + "?assembly=" + assemblyName);
         }
 
-        /// <summary>
-        /// Translates a given <see cref="Uri"/> to a <see cref="Uri"/> that follows the resm scheme.
-        /// </summary>
-        /// <param name="uri"></param>
-        /// <returns></returns>
-        private static string GetLocationPath(Uri uri)
-        {
-            if (uri.Scheme == "resm") return uri.AbsolutePath;
-
-            var path = uri.AbsolutePath.Replace("/", ".");
-
-            return path;
-        }
-
         /// <summary>
         /// Extracts a <see cref="AssemblyDescriptor"/> from a given <see cref="Uri"/>
         /// </summary>
@@ -119,7 +109,7 @@ namespace Avalonia.Media.Fonts
 
             var parameters = ParseParameters(uri);
 
-            return parameters.TryGetValue("assembly", out var assemblyName) ? GetAssembly(assemblyName) : null;
+            return parameters.TryGetValue("assembly", out var assemblyName) ? GetAssembly(assemblyName) : _defaultAssembly;
         }
 
         /// <summary>