1 files changed, 88 insertions, 0 deletions
diff --git a/dom/svg/nsISVGPoint.cpp b/dom/svg/nsISVGPoint.cpp
new file mode 100644
index 000000000..1c1971004
--- /dev/null
+++ b/dom/svg/nsISVGPoint.cpp
@@ -0,0 +1,88 @@
+/* -*- 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 "nsISVGPoint.h"
+#include "DOMSVGPointList.h"
+#include "SVGPoint.h"
+#include "nsSVGElement.h"
+#include "nsError.h"
+#include "mozilla/dom/SVGPointBinding.h"
+
+// See the architecture comment in DOMSVGPointList.h.
+
+using namespace mozilla;
+
+// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
+// clear our list's weak ref to us to be safe. (The other option would be to
+// not unlink and rely on the breaking of the other edges in the cycle, as
+// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsISVGPoint)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsISVGPoint)
+  // We may not belong to a list, so we must null check tmp->mList.
+  if (tmp->mList) {
+    tmp->mList->mItems[tmp->mListIndex] = nullptr;
+  }
+NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsISVGPoint)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsISVGPoint)
+NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsISVGPoint)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsISVGPoint)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsISVGPoint)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISVGPoint)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+void
+nsISVGPoint::InsertingIntoList(DOMSVGPointList *aList,
+                               uint32_t aListIndex,
+                               bool aIsAnimValItem)
+{
+  MOZ_ASSERT(!HasOwner(), "Inserting item that already has an owner");
+
+  mList = aList;
+  mListIndex = aListIndex;
+  mIsReadonly = false;
+  mIsAnimValItem = aIsAnimValItem;
+
+  MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");
+}
+
+void
+nsISVGPoint::RemovingFromList()
+{
+  mPt = InternalItem();
+  mList = nullptr;
+  MOZ_ASSERT(!mIsReadonly, "mIsReadonly set for list");
+  mIsAnimValItem = false;
+}
+
+SVGPoint&
+nsISVGPoint::InternalItem()
+{
+  return mList->InternalList().mItems[mListIndex];
+}
+
+#ifdef DEBUG
+bool
+nsISVGPoint::IndexIsValid()
+{
+  return mListIndex < mList->InternalList().Length();
+}
+#endif
+