Bug 1409975 - Implement node distribution for shadow tree slots

* Implementation for assignedNodes
* Include slots in the flat tree
* Fix event get-the-parent algorithm for a node
* Update and add reftests for Shadow DOM v1
* Update web platform tests expectations

Tag #1375

1 files changed, 23 insertions, 0 deletions

diff --git a/dom/html/HTMLSlotElement.h b/dom/html/HTMLSlotElement.h
index 187a295db..4f8546200 100644
--- a/dom/html/HTMLSlotElement.h
+++ b/dom/html/HTMLSlotElement.h
@@ -26,6 +26,22 @@ public:
   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLSlotElement, nsGenericHTMLElement)
   virtual nsresult Clone(mozilla::dom::NodeInfo* aNodeInfo, nsINode** aResult) const override;
 
+  // nsIContent
+  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+                              nsIContent* aBindingParent,
+                              bool aCompileEventHandlers) override;
+  virtual void UnbindFromTree(bool aDeep = true,
+                              bool aNullParent = true) override;
+
+  virtual nsresult BeforeSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
+                                 const nsAttrValueOrString* aValue,
+                                 bool aNotify) override;
+  virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsIAtom* aName,
+                                const nsAttrValue* aValue,
+                                const nsAttrValue* aOldValue,
+                                bool aNotify) override;
+
+  // WebIDL
   void SetName(const nsAString& aName, ErrorResult& aRv)
   {
     SetHTMLAttr(nsGkAtoms::name, aName, aRv);
@@ -39,6 +55,13 @@ public:
   void AssignedNodes(const AssignedNodesOptions& aOptions,
                      nsTArray<RefPtr<nsINode>>& aNodes);
 
+  // Helper methods
+  const nsTArray<RefPtr<nsINode>>& AssignedNodes() const;
+  void InsertAssignedNode(uint32_t aIndex, nsINode* aNode);
+  void AppendAssignedNode(nsINode* aNode);
+  void RemoveAssignedNode(nsINode* aNode);
+  void ClearAssignedNodes();
+
 protected:
   virtual ~HTMLSlotElement();
   virtual JSObject*