1 files changed, 109 insertions, 0 deletions
diff --git a/dom/svg/SVGMPathElement.h b/dom/svg/SVGMPathElement.h
new file mode 100644
index 000000000..fe0894a54
--- /dev/null
+++ b/dom/svg/SVGMPathElement.h
@@ -0,0 +1,109 @@
+/* -*- 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_SVGMPathElement_h
+#define mozilla_dom_SVGMPathElement_h
+
+#include "nsSVGElement.h"
+#include "nsStubMutationObserver.h"
+#include "nsSVGString.h"
+#include "nsReferencedElement.h"
+
+nsresult NS_NewSVGMPathElement(nsIContent **aResult,
+                               already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+
+typedef nsSVGElement SVGMPathElementBase;
+
+namespace mozilla {
+namespace dom {
+class SVGPathElement;
+
+class SVGMPathElement final : public SVGMPathElementBase,
+                              public nsStubMutationObserver
+{
+protected:
+  friend nsresult (::NS_NewSVGMPathElement(nsIContent **aResult,
+                                           already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
+  explicit SVGMPathElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
+  ~SVGMPathElement();
+
+  virtual JSObject* WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+public:
+  // interfaces:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(SVGMPathElement,
+                                           SVGMPathElementBase)
+
+  NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
+
+  // nsIContent interface
+  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, bool aNullParent) override;
+
+  virtual nsresult UnsetAttr(int32_t aNamespaceID, nsIAtom* aAttribute,
+                             bool aNotify) override;
+  // Element specializations
+  virtual bool ParseAttribute(int32_t aNamespaceID,
+                                nsIAtom* aAttribute,
+                                const nsAString& aValue,
+                                nsAttrValue& aResult) override;
+
+  // Public helper method: If our xlink:href attribute links to a <path>
+  // element, this method returns a pointer to that element. Otherwise,
+  // this returns nullptr.
+  SVGPathElement* GetReferencedPath();
+
+  // WebIDL
+  already_AddRefed<SVGAnimatedString> Href();
+
+protected:
+  class PathReference : public nsReferencedElement {
+  public:
+    explicit PathReference(SVGMPathElement* aMpathElement) :
+      mMpathElement(aMpathElement) {}
+  protected:
+    // We need to be notified when target changes, in order to request a sample
+    // (which will clear animation effects that used the old target-path
+    // and recompute the animation effects using the new target-path).
+    virtual void ElementChanged(Element* aFrom, Element* aTo) override {
+      nsReferencedElement::ElementChanged(aFrom, aTo);
+      if (aFrom) {
+        aFrom->RemoveMutationObserver(mMpathElement);
+      }
+      if (aTo) {
+        aTo->AddMutationObserver(mMpathElement);
+      }
+      mMpathElement->NotifyParentOfMpathChange(mMpathElement->GetParent());
+    }
+
+    // We need to override IsPersistent to get persistent tracking (beyond the
+    // first time the target changes)
+    virtual bool IsPersistent() override { return true; }
+  private:
+    SVGMPathElement* const mMpathElement;
+  };
+
+  virtual StringAttributesInfo GetStringInfo() override;
+
+  void UpdateHrefTarget(nsIContent* aParent, const nsAString& aHrefStr);
+  void UnlinkHrefTarget(bool aNotifyParent);
+  void NotifyParentOfMpathChange(nsIContent* aParent);
+
+  enum { HREF, XLINK_HREF };
+  nsSVGString        mStringAttributes[2];
+  static StringInfo  sStringInfo[2];
+  PathReference      mHrefTarget;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_SVGMPathElement_h