src/Tools/jEdit/src/document_model.scala

           name = Library.perhaps_unprefix(plain_text_prefix, query)
           model <- get(PIDE.resources.node_name(name))
         }
         yield {
           val snapshot = model.await_stable_snapshot()
+          val context = Presentation.html_context(fonts_url = HTML.fonts_dir(fonts_root))
           val document =
-            Presentation.html_document(PIDE.resources, snapshot,
-              fonts_url = HTML.fonts_dir(fonts_root),
+            Presentation.html_document(PIDE.resources, snapshot, context,
               plain_text = query.startsWith(plain_text_prefix))
           HTTP.Response.html(document.content)
         })
 
     List(HTTP.fonts(fonts_root), html)