reuse defined langcode. refs #65

whistyun · Jun 28, 2023 · 05b31f8 · 05b31f8
1 parent 8c5e35a
commit 05b31f8
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Showing 3 changed files with 25 additions and 4 deletions.
diff --git a/MdXaml.Plugins/HighlightDefinition.cs b/MdXaml.Plugins/HighlightDefinition.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -8,7 +9,8 @@ namespace MdXaml.Plugins
 {
     public class Definition
     {
-        public string Alias { get; set; }
-        public Uri Resource { get; set; }
+        public string? Alias { get; set; }
+        public Uri? Resource { get; set; }
+        public string? RealName { get; set; }
     }
 }
diff --git a/MdXaml/Highlighting/InternalHighlightManager.cs b/MdXaml/Highlighting/InternalHighlightManager.cs
@@ -84,7 +84,25 @@ private static Stream Open(Uri path)
 
         public void Register(Definition def)
         {
-            var definition = Load(def.Resource);
+            if (def.Alias is null)
+                throw new ArgumentException("Definition.Alias must not be null.");
+
+            if ((def.Resource is not null && def.RealName is not null))
+                throw new ArgumentException("Only one of Definition.Resource and Definition.RealName must be set.");
+
+            IHighlightingDefinition definition;
+            if (def.Resource is not null)
+                definition = Load(def.Resource);
+
+            else if (def.RealName is not null)
+                if (Get(def.RealName) is { } d)
+                    definition = d;
+                else
+                    throw new ArgumentException($"syntax highlighting `{def.RealName}` is not found.");
+
+            else
+                throw new ArgumentException("Only one of Definition.Resource and Definition.RealName must be set.");
+
 
             foreach (var alias in def.Alias.Split(','))
             {

diff --git a/samples/MdXaml.Demo/App.xaml b/samples/MdXaml.Demo/App.xaml
@@ -15,7 +15,8 @@
             <mdagif:AnimatedGifPluginSetup/>
 
             <mdplugins:MdXamlPlugins.Highlights>
-                <mdplugins:Definition Alias="pegasus,peg" Resource="pack://application:,,,/Asset/Pegasus-Mode.xshd" />
+                <mdplugins:Definition Alias="pegasus,peg"   Resource="pack://application:,,,/Asset/Pegasus-Mode.xshd" />
+                <mdplugins:Definition Alias="typescript,ts" RealName="javascript" />
             </mdplugins:MdXamlPlugins.Highlights>
         </mdplugins:MdXamlPlugins>
     </Application.Resources>