mdhelp: reuse class doc from parent

src/idnode.c

@@ -1298,6 +1298,17 @@ idclass_get_order (const idclass_t *idc)
   return NULL;
 }
 
+const char **
+idclass_get_doc (const idclass_t *idc)
+{
+  while (idc) {
+    if (idc->ic_doc)
+      return idc->ic_doc;
+    idc = idc->ic_super;
+  }
+  return NULL;
+}
+
 static htsmsg_t *
 idclass_get_property_groups (const idclass_t *idc, const char *lang)
 {

src/idnode.h

@@ -227,6 +227,7 @@ void idclass_register ( const idclass_t *idc );
 const idclass_t *idclass_find ( const char *name );
 idclass_t const **idclass_find_all(void);
 idclass_t const **idclass_find_children(const char *name);
+const char **idclass_get_doc(const idclass_t *idc);
 const char *idclass_get_caption ( const idclass_t *idc, const char *lang );
 htsmsg_t *idclass_serialize0 (const idclass_t *idc, htsmsg_t *list, int optmask, const char *lang);
 htsmsg_t *idnode_serialize0  (idnode_t *self, htsmsg_t *list, int optmask, const char *lang);

src/webui/doc_md.c

@@ -139,7 +139,7 @@ http_markdown_class(http_connection_t *hc, const char *clazz)
     pthread_mutex_unlock(&global_lock);
     return HTTP_STATUS_NOT_FOUND;
   }
-  doc = ic->ic_doc;
+  doc = idclass_get_doc(ic);
   m = idclass_serializedoc(ic, lang);
   pthread_mutex_unlock(&global_lock);
   s = htsmsg_get_str(m, "caption");