Auto merge of #22743 - ferjm:shadowdom, r=emilio

Partial ShadowDOM support

This is just an early WIP, not to take it very seriously yet.

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [x] These changes fix #22719
- [x] There are tests for these changes

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1 files changed, 4 insertions, 3 deletions

diff --git a/components/script/dom/htmlformelement.rs b/components/script/dom/htmlformelement.rs
index 31087dc11df..9e988515ac0 100755
--- a/components/script/dom/htmlformelement.rs
+++ b/components/script/dom/htmlformelement.rs
@@ -41,7 +41,8 @@ use crate::dom::htmloutputelement::HTMLOutputElement;
 use crate::dom::htmlselectelement::HTMLSelectElement;
 use crate::dom::htmltextareaelement::HTMLTextAreaElement;
 use crate::dom::node::{document_from_node, window_from_node};
-use crate::dom::node::{Node, NodeFlags, UnbindContext, VecPreOrderInsertionHelper};
+use crate::dom::node::{Node, NodeFlags, ShadowIncluding};
+use crate::dom::node::{UnbindContext, VecPreOrderInsertionHelper};
 use crate::dom::validitystate::ValidationFlags;
 use crate::dom::virtualmethods::VirtualMethods;
 use crate::dom::window::Window;
@@ -582,7 +583,7 @@ impl HTMLFormElement {
         //               form, refactor this when html5ever's form owner PR lands
         // Step 1-3
         let invalid_controls = node
-            .traverse_preorder()
+            .traverse_preorder(ShadowIncluding::No)
             .filter_map(|field| {
                 if let Some(el) = field.downcast::<Element>() {
                     if el.disabled_state() {
@@ -1100,7 +1101,7 @@ pub trait FormControl: DomObject {
         let form_id = elem.get_string_attribute(&local_name!("form"));
         let node = elem.upcast::<Node>();
 
-        if self.is_listed() && !form_id.is_empty() && node.is_in_doc() {
+        if self.is_listed() && !form_id.is_empty() && node.is_connected() {
             let doc = document_from_node(node);
             doc.register_form_id_listener(form_id, self);
         }