Implemented mid node selection.

modules/docs/src/Volo.Docs.Application.Contracts/Volo/Docs/Documents/ContentWithDetailsDto.cs

@@ -43,7 +43,7 @@ namespace Volo.Docs.Documents
         public bool HasChildItems => Items != null && Items.Any();
 
         public bool IsEmpty => Text == null && Path == null;
-
+         
         public bool IsSelected(string documentName)
         {
             if (documentName == null)
@@ -51,22 +51,25 @@ namespace Volo.Docs.Documents
                 return false;
             }
 
-            if (!HasChildItems)
+            if (string.Equals(documentName, Path, StringComparison.InvariantCultureIgnoreCase))
             {
-                return documentName == Path;
+                return true;
+            }
+
+            if (Items == null)
+            {
+                return false;
             }
 
-            var isSelected = false;
-            foreach (var n in Items)
+            foreach (var childItem in Items)
             {
-                if (n.IsSelected(documentName))
+                if (childItem.IsSelected(documentName))
                 {
-                    isSelected = true;
-                    break;
+                    return true;
                 }
             }
 
-            return isSelected;
+            return false;
         }
 
     }

modules/docs/src/Volo.Docs.Web/Areas/Documents/Helpers/TagHelpers/TreeTagHelper.cs

@@ -54,7 +54,7 @@ namespace Volo.Docs.Areas.Documents.Helpers.TagHelpers
         {
             var content = "";
 
-            var isAnyNodeOpenedInThisLevel = node.Items?.Any(n => n.IsSelected(SelectedDocumentName)) ?? false;
+            var isAnyNodeOpenedInThisLevel = IsAnyNodeOpenedInThisLevel(node);
 
             node.Items?.ForEach(innerNode =>
             {
@@ -66,6 +66,26 @@ namespace Volo.Docs.Areas.Documents.Helpers.TagHelpers
             return result;
         }
 
+        private bool IsAnyNodeOpenedInThisLevel(NavigationNode node)
+        {
+            if (node.Items == null)
+            {
+                return false;
+            }
+
+            if (node.IsSelected(SelectedDocumentName))
+            {
+                return true;
+            }
+
+            if (node.Items.Any(n => n.IsSelected(SelectedDocumentName)))
+            {
+                return true;
+            }
+
+            return false;
+        }
+
         private string GetParentNode(NavigationNode node, bool isOpened)
         {
             var output = RenderNodeAsHtml(node);