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-rw-r--r--src/core/node.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/core/node.c b/src/core/node.c
index 8137a9c..d570a72 100644
--- a/src/core/node.c
+++ b/src/core/node.c
@@ -638,9 +638,14 @@ dom_exception dom_node_insert_before(struct dom_node *node,
return DOM_NO_ERR;
}
- /* If new_child is already in the tree, remove it */
- if (new_child->parent != NULL)
+ /* If new_child is already in the tree and
+ * its parent isn't read only, remove it */
+ if (new_child->parent != NULL) {
+ if (_dom_node_readonly(new_child->parent))
+ return DOM_NO_MODIFICATION_ALLOWED_ERR;
+
_dom_node_detach(new_child);
+ }
/* If new_child is a DocumentFragment, insert its children
* Otherwise, insert new_child */