1 files changed, 127 insertions, 0 deletions
diff --git a/dom/svg/SVGUseElement.h b/dom/svg/SVGUseElement.h
new file mode 100644
index 000000000..7630e9af6
--- /dev/null
+++ b/dom/svg/SVGUseElement.h
@@ -0,0 +1,127 @@
+/* -*- 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_SVGUseElement_h
+#define mozilla_dom_SVGUseElement_h
+
+#include "mozilla/dom/FromParser.h"
+#include "nsReferencedElement.h"
+#include "nsStubMutationObserver.h"
+#include "mozilla/dom/SVGGraphicsElement.h"
+#include "nsSVGLength2.h"
+#include "nsSVGString.h"
+#include "nsTArray.h"
+
+class nsIContent;
+class nsSVGUseFrame;
+
+nsresult
+NS_NewSVGSVGElement(nsIContent **aResult,
+                    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+                    mozilla::dom::FromParser aFromParser);
+nsresult NS_NewSVGUseElement(nsIContent **aResult,
+                             already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+
+namespace mozilla {
+namespace dom {
+
+typedef SVGGraphicsElement SVGUseElementBase;
+
+class SVGUseElement final : public SVGUseElementBase,
+                            public nsStubMutationObserver
+{
+  friend class ::nsSVGUseFrame;
+protected:
+  friend nsresult (::NS_NewSVGUseElement(nsIContent **aResult,
+                                         already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
+  explicit SVGUseElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
+  virtual ~SVGUseElement();
+  virtual JSObject* WrapNode(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;
+
+public:
+  // interfaces:
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGUseElement, SVGUseElementBase)
+
+  NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
+  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
+  NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
+  NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
+
+  // for nsSVGUseFrame's nsIAnonymousContentCreator implementation.
+  nsIContent* CreateAnonymousContent();
+  nsIContent* GetAnonymousContent() const { return mClone; }
+  void DestroyAnonymousContent();
+
+  // nsSVGElement specializations:
+  virtual gfxMatrix PrependLocalTransformsTo(
+    const gfxMatrix &aMatrix,
+    SVGTransformTypes aWhich = eAllTransforms) const override;
+  virtual bool HasValidDimensions() const override;
+
+  // nsIContent interface
+  virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const override;
+  NS_IMETHOD_(bool) IsAttributeMapped(const nsIAtom* aAttribute) const override;
+
+  // WebIDL
+  already_AddRefed<SVGAnimatedString> Href();
+  already_AddRefed<SVGAnimatedLength> X();
+  already_AddRefed<SVGAnimatedLength> Y();
+  already_AddRefed<SVGAnimatedLength> Width();
+  already_AddRefed<SVGAnimatedLength> Height();
+
+  nsIURI* GetSourceDocURI();
+
+protected:
+  class SourceReference : public nsReferencedElement {
+  public:
+    explicit SourceReference(SVGUseElement* aContainer) : mContainer(aContainer) {}
+  protected:
+    virtual void ElementChanged(Element* aFrom, Element* aTo) override {
+      nsReferencedElement::ElementChanged(aFrom, aTo);
+      if (aFrom) {
+        aFrom->RemoveMutationObserver(mContainer);
+      }
+      mContainer->TriggerReclone();
+    }
+  private:
+    SVGUseElement* mContainer;
+  };
+
+  virtual LengthAttributesInfo GetLengthInfo() override;
+  virtual StringAttributesInfo GetStringInfo() override;
+
+  /**
+   * Returns true if our width and height should be used, or false if they
+   * should be ignored. As per the spec, this depends on the type of the
+   * element that we're referencing.
+   */
+  bool OurWidthAndHeightAreUsed() const;
+  void SyncWidthOrHeight(nsIAtom *aName);
+  void LookupHref();
+  void TriggerReclone();
+  void UnlinkSource();
+
+  enum { ATTR_X, ATTR_Y, ATTR_WIDTH, ATTR_HEIGHT };
+  nsSVGLength2 mLengthAttributes[4];
+  static LengthInfo sLengthInfo[4];
+
+  enum { HREF, XLINK_HREF };
+  nsSVGString mStringAttributes[2];
+  static StringInfo sStringInfo[2];
+
+  nsCOMPtr<nsIContent> mOriginal; // if we've been cloned, our "real" copy
+  nsCOMPtr<nsIContent> mClone;    // cloned tree
+  SourceReference      mSource;   // observed element
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_SVGUseElement_h