1 files changed, 143 insertions, 0 deletions
diff --git a/dom/svg/DOMSVGAnimatedLengthList.cpp b/dom/svg/DOMSVGAnimatedLengthList.cpp
new file mode 100644
index 000000000..955d59602
--- /dev/null
+++ b/dom/svg/DOMSVGAnimatedLengthList.cpp
@@ -0,0 +1,143 @@
+/* -*- 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/. */
+
+#include "DOMSVGAnimatedLengthList.h"
+#include "DOMSVGLengthList.h"
+#include "SVGAnimatedLengthList.h"
+#include "nsSVGElement.h"
+#include "nsCOMPtr.h"
+#include "nsSVGAttrTearoffTable.h"
+#include "mozilla/dom/SVGAnimatedLengthListBinding.h"
+
+// See the architecture comment in this file's header.
+
+namespace mozilla {
+
+static inline
+nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>&
+SVGAnimatedLengthListTearoffTable()
+{
+  static nsSVGAttrTearoffTable<SVGAnimatedLengthList, DOMSVGAnimatedLengthList>
+    sSVGAnimatedLengthListTearoffTable;
+  return sSVGAnimatedLengthListTearoffTable;
+}
+
+NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGAnimatedLengthList, mElement)
+
+NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(DOMSVGAnimatedLengthList, AddRef)
+NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(DOMSVGAnimatedLengthList, Release)
+
+JSObject*
+DOMSVGAnimatedLengthList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return dom::SVGAnimatedLengthListBinding::Wrap(aCx, this, aGivenProto);
+}
+
+already_AddRefed<DOMSVGLengthList>
+DOMSVGAnimatedLengthList::BaseVal()
+{
+  if (!mBaseVal) {
+    mBaseVal = new DOMSVGLengthList(this, InternalAList().GetBaseValue());
+  }
+  RefPtr<DOMSVGLengthList> baseVal = mBaseVal;
+  return baseVal.forget();
+}
+
+already_AddRefed<DOMSVGLengthList>
+DOMSVGAnimatedLengthList::AnimVal()
+{
+  if (!mAnimVal) {
+    mAnimVal = new DOMSVGLengthList(this, InternalAList().GetAnimValue());
+  }
+  RefPtr<DOMSVGLengthList> animVal = mAnimVal;
+  return animVal.forget();
+}
+
+/* static */ already_AddRefed<DOMSVGAnimatedLengthList>
+DOMSVGAnimatedLengthList::GetDOMWrapper(SVGAnimatedLengthList *aList,
+                                        nsSVGElement *aElement,
+                                        uint8_t aAttrEnum,
+                                        uint8_t aAxis)
+{
+  RefPtr<DOMSVGAnimatedLengthList> wrapper =
+    SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
+  if (!wrapper) {
+    wrapper = new DOMSVGAnimatedLengthList(aElement, aAttrEnum, aAxis);
+    SVGAnimatedLengthListTearoffTable().AddTearoff(aList, wrapper);
+  }
+  return wrapper.forget();
+}
+
+/* static */ DOMSVGAnimatedLengthList*
+DOMSVGAnimatedLengthList::GetDOMWrapperIfExists(SVGAnimatedLengthList *aList)
+{
+  return SVGAnimatedLengthListTearoffTable().GetTearoff(aList);
+}
+
+DOMSVGAnimatedLengthList::~DOMSVGAnimatedLengthList()
+{
+  // Script no longer has any references to us, to our base/animVal objects, or
+  // to any of their list items.
+  SVGAnimatedLengthListTearoffTable().RemoveTearoff(&InternalAList());
+}
+
+void
+DOMSVGAnimatedLengthList::InternalBaseValListWillChangeTo(const SVGLengthList& aNewValue)
+{
+  // When the number of items in our internal counterpart's baseVal changes,
+  // we MUST keep our baseVal in sync. If we don't, script will either see a
+  // list that is too short and be unable to access indexes that should be
+  // valid, or else, MUCH WORSE, script will see a list that is too long and be
+  // able to access "items" at indexes that are out of bounds (read/write to
+  // bad memory)!!
+
+  RefPtr<DOMSVGAnimatedLengthList> kungFuDeathGrip;
+  if (mBaseVal) {
+    if (aNewValue.Length() < mBaseVal->LengthNoFlush()) {
+      // InternalListLengthWillChange might clear last reference to |this|.
+      // Retain a temporary reference to keep from dying before returning.
+      kungFuDeathGrip = this;
+    }
+    mBaseVal->InternalListLengthWillChange(aNewValue.Length());
+  }
+
+  // If our attribute is not animating, then our animVal mirrors our baseVal
+  // and we must sync its length too. (If our attribute is animating, then the
+  // SMIL engine takes care of calling InternalAnimValListWillChangeTo() if
+  // necessary.)
+
+  if (!IsAnimating()) {
+    InternalAnimValListWillChangeTo(aNewValue);
+  }
+}
+
+void
+DOMSVGAnimatedLengthList::InternalAnimValListWillChangeTo(const SVGLengthList& aNewValue)
+{
+  if (mAnimVal) {
+    mAnimVal->InternalListLengthWillChange(aNewValue.Length());
+  }
+}
+
+bool
+DOMSVGAnimatedLengthList::IsAnimating() const
+{
+  return InternalAList().IsAnimating();
+}
+
+SVGAnimatedLengthList&
+DOMSVGAnimatedLengthList::InternalAList()
+{
+  return *mElement->GetAnimatedLengthList(mAttrEnum);
+}
+
+const SVGAnimatedLengthList&
+DOMSVGAnimatedLengthList::InternalAList() const
+{
+  return *mElement->GetAnimatedLengthList(mAttrEnum);
+}
+
+} // namespace mozilla