1 files changed, 135 insertions, 0 deletions
diff --git a/dom/html/HTMLContentElement.h b/dom/html/HTMLContentElement.h
new file mode 100644
index 000000000..f019e56cd
--- /dev/null
+++ b/dom/html/HTMLContentElement.h
@@ -0,0 +1,135 @@
+/* -*- 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_HTMLContentElement_h__
+#define mozilla_dom_HTMLContentElement_h__
+
+#include "nsAutoPtr.h"
+#include "nsINodeList.h"
+#include "nsGenericHTMLElement.h"
+
+struct nsCSSSelectorList;
+
+namespace mozilla {
+namespace dom {
+
+class DistributedContentList;
+
+class HTMLContentElement final : public nsGenericHTMLElement
+{
+public:
+  explicit HTMLContentElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
+
+  // nsISupports
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLContentElement,
+                                           nsGenericHTMLElement)
+
+  static HTMLContentElement* FromContent(nsIContent* aContent)
+  {
+    if (aContent->IsHTMLContentElement()) {
+      return static_cast<HTMLContentElement*>(aContent);
+    }
+
+    return nullptr;
+  }
+
+  virtual bool IsHTMLContentElement() const override { return true; }
+
+  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
+
+  virtual nsIDOMNode* AsDOMNode() override { return this; }
+
+  virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
+                              nsIContent* aBindingParent,
+                              bool aCompileEventHandlers) override;
+
+  virtual void UnbindFromTree(bool aDeep = true,
+                              bool aNullParent = true) override;
+
+  /**
+   * Returns whether if the selector of this insertion point
+   * matches the provided content.
+   */
+  bool Match(nsIContent* aContent);
+  bool IsInsertionPoint() const { return mIsInsertionPoint; }
+  nsCOMArray<nsIContent>& MatchedNodes() { return mMatchedNodes; }
+  void AppendMatchedNode(nsIContent* aContent);
+  void RemoveMatchedNode(nsIContent* aContent);
+  void InsertMatchedNode(uint32_t aIndex, nsIContent* aContent);
+  void ClearMatchedNodes();
+
+  virtual nsresult SetAttr(int32_t aNameSpaceID, nsIAtom* aName,
+                           nsIAtom* aPrefix, const nsAString& aValue,
+                           bool aNotify) override;
+
+  virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
+                             bool aNotify) override;
+
+  // WebIDL methods.
+  already_AddRefed<DistributedContentList> GetDistributedNodes();
+  void GetSelect(nsAString& aSelect)
+  {
+    Element::GetAttr(kNameSpaceID_None, nsGkAtoms::select, aSelect);
+  }
+  void SetSelect(const nsAString& aSelect)
+  {
+    Element::SetAttr(kNameSpaceID_None, nsGkAtoms::select, aSelect, true);
+  }
+
+protected:
+  virtual ~HTMLContentElement();
+
+  virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  /**
+   * Updates the destination insertion points of the fallback
+   * content of this insertion point. If there are nodes matched
+   * to this insertion point, then destination insertion points
+   * of fallback are cleared, otherwise, this insertion point
+   * is a destination insertion point.
+   */
+  void UpdateFallbackDistribution();
+
+  /**
+   * An array of nodes from the ShadowRoot host that match the
+   * content insertion selector.
+   */
+  nsCOMArray<nsIContent> mMatchedNodes;
+
+  nsAutoPtr<nsCSSSelectorList> mSelectorList;
+  bool mValidSelector;
+  bool mIsInsertionPoint;
+};
+
+class DistributedContentList : public nsINodeList
+{
+public:
+  explicit DistributedContentList(HTMLContentElement* aHostElement);
+
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(DistributedContentList)
+
+  // nsIDOMNodeList
+  NS_DECL_NSIDOMNODELIST
+
+  // nsINodeList
+  virtual nsIContent* Item(uint32_t aIndex) override;
+  virtual int32_t IndexOf(nsIContent* aContent) override;
+  virtual nsINode* GetParentObject() override { return mParent; }
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+protected:
+  virtual ~DistributedContentList();
+  RefPtr<HTMLContentElement> mParent;
+  nsCOMArray<nsIContent> mDistributedNodes;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_HTMLContentElement_h__
+