添加项目文件。

TightWiki.Engine.Library/Interfaces/IExternalLinkHandler.cs

@@ -0,0 +1,18 @@
+namespace TightWiki.Engine.Library.Interfaces
+{
+    /// <summary>
+    /// Handles links the wiki to another site.
+    /// </summary>
+    public interface IExternalLinkHandler
+    {
+        /// <summary>
+        /// Handles an internal wiki link.
+        /// </summary>
+        /// <param name="state">Reference to the wiki state object</param>
+        /// <param name="link">The address of the external site being linked to.</param>
+        /// <param name="text">The text which should be show in the absence of an image.</param>
+        /// <param name="image">The image that should be shown.</param>
+        /// <param name="imageScale">The 0-100 image scale factor for the given image.</param>
+        public HandlerResult Handle(ITightEngineState state, string link, string? text, string? image);
+    }
+}