1 files changed, 96 insertions, 0 deletions
diff --git a/dom/html/HTMLShadowElement.h b/dom/html/HTMLShadowElement.h
new file mode 100644
index 000000000..95083b802
--- /dev/null
+++ b/dom/html/HTMLShadowElement.h
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_HTMLShadowElement_h__
+#define mozilla_dom_HTMLShadowElement_h__
+
+#include "nsGenericHTMLElement.h"
+
+namespace mozilla {
+namespace dom {
+
+class HTMLShadowElement final : public nsGenericHTMLElement,
+                                public nsStubMutationObserver
+{
+public:
+  explicit HTMLShadowElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
+
+  // nsISupports
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLShadowElement,
+                                           nsGenericHTMLElement)
+
+  static HTMLShadowElement* FromContent(nsIContent* aContent)
+  {
+    if (aContent->IsHTMLShadowElement()) {
+      return static_cast<HTMLShadowElement*>(aContent);
+    }
+
+    return nullptr;
+  }
+
+  virtual bool IsHTMLShadowElement() const override { return true; }
+
+  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
+
+  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+                              nsIContent* aBindingParent,
+                              bool aCompileEventHandlers) override;
+
+  virtual void UnbindFromTree(bool aDeep = true,
+                              bool aNullParent = true) override;
+
+  bool IsInsertionPoint() { return mIsInsertionPoint; }
+
+  /**
+   * Sets the ShadowRoot that will be rendered in place of
+   * this shadow insertion point.
+   */
+  void SetProjectedShadow(ShadowRoot* aProjectedShadow);
+
+  /**
+   * Distributes a single explicit child of the projected ShadowRoot
+   * to relevant insertion points.
+   */
+  void DistributeSingleNode(nsIContent* aContent);
+
+  /**
+   * Removes a single explicit child of the projected ShadowRoot
+   * from relevant insertion points.
+   */
+  void RemoveDistributedNode(nsIContent* aContent);
+
+  /**
+   * Distributes all the explicit children of the projected ShadowRoot
+   * to the shadow insertion point in the younger ShadowRoot and
+   * the content insertion point of the parent node's ShadowRoot.
+   */
+  void DistributeAllNodes();
+
+  // WebIDL methods.
+  ShadowRoot* GetOlderShadowRoot() { return mProjectedShadow; }
+
+protected:
+  virtual ~HTMLShadowElement();
+
+  virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  // The ShadowRoot that will be rendered in place of this shadow insertion point.
+  RefPtr<ShadowRoot> mProjectedShadow;
+
+  bool mIsInsertionPoint;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_HTMLShadowElement_h__
+