1 files changed, 141 insertions, 0 deletions
diff --git a/dom/svg/DOMSVGNumber.cpp b/dom/svg/DOMSVGNumber.cpp
new file mode 100644
index 0000000000..d24332aca4
--- /dev/null
+++ b/dom/svg/DOMSVGNumber.cpp
@@ -0,0 +1,141 @@
+/* -*- 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 "DOMSVGNumber.h"
+#include "DOMSVGNumberList.h"
+#include "DOMSVGAnimatedNumberList.h"
+#include "SVGAnimatedNumberList.h"
+#include "SVGElement.h"
+#include "nsError.h"
+#include "nsContentUtils.h"  // for NS_ENSURE_FINITE
+#include "mozilla/dom/SVGNumberBinding.h"
+#include "mozilla/dom/SVGSVGElement.h"
+
+// See the architecture comment in DOMSVGAnimatedNumberList.h.
+
+namespace mozilla::dom {
+
+// 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(DOMSVGNumber)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGNumber)
+  // 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_PRESERVED_WRAPPER
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGNumber)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGNumber)
+  NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
+NS_IMPL_CYCLE_COLLECTION_TRACE_END
+
+DOMSVGNumber::DOMSVGNumber(DOMSVGNumberList* aList, uint8_t aAttrEnum,
+                           uint32_t aListIndex, bool aIsAnimValItem)
+    : mList(aList),
+      mParent(aList),
+      mListIndex(aListIndex),
+      mAttrEnum(aAttrEnum),
+      mIsAnimValItem(aIsAnimValItem),
+      mValue(0.0f) {
+  // These shifts are in sync with the members in the header.
+  MOZ_ASSERT(aList && aAttrEnum < (1 << 4) && aListIndex <= MaxListIndex(),
+             "bad arg");
+
+  MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
+}
+
+DOMSVGNumber::DOMSVGNumber(nsISupports* aParent)
+    : mList(nullptr),
+      mParent(aParent),
+      mListIndex(0),
+      mAttrEnum(0),
+      mIsAnimValItem(false),
+      mValue(0.0f) {}
+
+DOMSVGNumber::DOMSVGNumber(SVGSVGElement* aParent)
+    : mList(nullptr),
+      mParent(ToSupports(aParent)),
+      mListIndex(0),
+      mAttrEnum(0),
+      mIsAnimValItem(false),
+      mValue(0.0f) {}
+
+float DOMSVGNumber::Value() {
+  if (mIsAnimValItem && HasOwner()) {
+    Element()->FlushAnimations();  // May make HasOwner() == false
+  }
+  return HasOwner() ? InternalItem() : mValue;
+}
+
+void DOMSVGNumber::SetValue(float aValue, ErrorResult& aRv) {
+  if (mIsAnimValItem) {
+    aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
+    return;
+  }
+
+  if (HasOwner()) {
+    if (InternalItem() == aValue) {
+      return;
+    }
+    AutoChangeNumberListNotifier notifier(this);
+    InternalItem() = aValue;
+    return;
+  }
+
+  mValue = aValue;
+}
+
+void DOMSVGNumber::InsertingIntoList(DOMSVGNumberList* aList, uint8_t aAttrEnum,
+                                     uint32_t aListIndex, bool aIsAnimValItem) {
+  NS_ASSERTION(!HasOwner(), "Inserting item that is already in a list");
+
+  mList = aList;
+  mAttrEnum = aAttrEnum;
+  mListIndex = aListIndex;
+  mIsAnimValItem = aIsAnimValItem;
+
+  MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
+}
+
+void DOMSVGNumber::RemovingFromList() {
+  mValue = InternalItem();
+  mList = nullptr;
+  mIsAnimValItem = false;
+}
+
+float DOMSVGNumber::ToSVGNumber() {
+  return HasOwner() ? InternalItem() : mValue;
+}
+
+float& DOMSVGNumber::InternalItem() {
+  SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
+  return mIsAnimValItem && alist->mAnimVal ? (*alist->mAnimVal)[mListIndex]
+                                           : alist->mBaseVal[mListIndex];
+}
+
+#ifdef DEBUG
+bool DOMSVGNumber::IndexIsValid() {
+  SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
+  return (mIsAnimValItem && mListIndex < alist->GetAnimValue().Length()) ||
+         (!mIsAnimValItem && mListIndex < alist->GetBaseValue().Length());
+}
+#endif
+
+JSObject* DOMSVGNumber::WrapObject(JSContext* aCx,
+                                   JS::Handle<JSObject*> aGivenProto) {
+  return SVGNumber_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+}  // namespace mozilla::dom