Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 589 insertions, 0 deletions

diff --git a/dom/svg/SVGSVGElement.cpp b/dom/svg/SVGSVGElement.cpp
new file mode 100644
index 0000000000..8df941b4f7
--- /dev/null
+++ b/dom/svg/SVGSVGElement.cpp
@@ -0,0 +1,589 @@
+/* -*- 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 "mozilla/dom/SVGSVGElement.h"
+
+#include "mozilla/ContentEvents.h"
+#include "mozilla/dom/BindContext.h"
+#include "mozilla/dom/DOMMatrix.h"
+#include "mozilla/dom/SVGSVGElementBinding.h"
+#include "mozilla/dom/SVGMatrix.h"
+#include "mozilla/dom/SVGRect.h"
+#include "mozilla/dom/SVGViewElement.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/ISVGDisplayableFrame.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/SMILAnimationController.h"
+#include "mozilla/SMILTimeContainer.h"
+#include "mozilla/SVGUtils.h"
+
+#include "DOMSVGAngle.h"
+#include "DOMSVGLength.h"
+#include "DOMSVGNumber.h"
+#include "DOMSVGPoint.h"
+#include "nsFrameSelection.h"
+#include "nsIFrame.h"
+#include "ISVGSVGFrame.h"
+
+NS_IMPL_NS_NEW_SVG_ELEMENT_CHECK_PARSER(SVG)
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace dom {
+
+using namespace SVGPreserveAspectRatio_Binding;
+using namespace SVGSVGElement_Binding;
+
+SVGEnumMapping SVGSVGElement::sZoomAndPanMap[] = {
+    {nsGkAtoms::disable, SVG_ZOOMANDPAN_DISABLE},
+    {nsGkAtoms::magnify, SVG_ZOOMANDPAN_MAGNIFY},
+    {nullptr, 0}};
+
+SVGElement::EnumInfo SVGSVGElement::sEnumInfo[1] = {
+    {nsGkAtoms::zoomAndPan, sZoomAndPanMap, SVG_ZOOMANDPAN_MAGNIFY}};
+
+JSObject* SVGSVGElement::WrapNode(JSContext* aCx,
+                                  JS::Handle<JSObject*> aGivenProto) {
+  return SVGSVGElement_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+//----------------------------------------------------------------------
+// nsISupports methods
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(SVGSVGElement)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGSVGElement,
+                                                SVGSVGElementBase)
+  if (tmp->mTimedDocumentRoot) {
+    tmp->mTimedDocumentRoot->Unlink();
+  }
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGSVGElement,
+                                                  SVGSVGElementBase)
+  if (tmp->mTimedDocumentRoot) {
+    tmp->mTimedDocumentRoot->Traverse(&cb);
+  }
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SVGSVGElement)
+  NS_INTERFACE_MAP_ENTRY_CONCRETE(SVGSVGElement)
+NS_INTERFACE_MAP_END_INHERITING(SVGSVGElementBase);
+
+NS_IMPL_ADDREF_INHERITED(SVGSVGElement, SVGSVGElementBase)
+NS_IMPL_RELEASE_INHERITED(SVGSVGElement, SVGSVGElementBase)
+
+SVGView::SVGView() {
+  mZoomAndPan.Init(SVGSVGElement::ZOOMANDPAN, SVG_ZOOMANDPAN_MAGNIFY);
+  mViewBox.Init();
+  mPreserveAspectRatio.Init();
+}
+
+//----------------------------------------------------------------------
+// Implementation
+
+SVGSVGElement::SVGSVGElement(
+    already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
+    FromParser aFromParser)
+    : SVGSVGElementBase(std::move(aNodeInfo)),
+      mCurrentTranslate(0.0f, 0.0f),
+      mCurrentScale(1.0f),
+      mStartAnimationOnBindToTree(aFromParser == NOT_FROM_PARSER ||
+                                  aFromParser == FROM_PARSER_FRAGMENT ||
+                                  aFromParser == FROM_PARSER_XSLT),
+      mImageNeedsTransformInvalidation(false) {}
+
+//----------------------------------------------------------------------
+// nsINode methods
+
+NS_IMPL_ELEMENT_CLONE_WITH_INIT_AND_PARSER(SVGSVGElement)
+
+//----------------------------------------------------------------------
+// nsIDOMSVGSVGElement methods:
+
+already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::X() {
+  return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Y() {
+  return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Width() {
+  return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
+}
+
+already_AddRefed<DOMSVGAnimatedLength> SVGSVGElement::Height() {
+  return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
+}
+
+bool SVGSVGElement::UseCurrentView() const {
+  return mSVGView || mCurrentViewID;
+}
+
+float SVGSVGElement::CurrentScale() const { return mCurrentScale; }
+
+#define CURRENT_SCALE_MAX 16.0f
+#define CURRENT_SCALE_MIN 0.0625f
+
+void SVGSVGElement::SetCurrentScale(float aCurrentScale) {
+  // Prevent bizarre behaviour and maxing out of CPU and memory by clamping
+  aCurrentScale = clamped(aCurrentScale, CURRENT_SCALE_MIN, CURRENT_SCALE_MAX);
+
+  if (aCurrentScale == mCurrentScale) {
+    return;
+  }
+  mCurrentScale = aCurrentScale;
+
+  if (IsRootSVGSVGElement()) {
+    InvalidateTransformNotifyFrame();
+  }
+}
+
+already_AddRefed<DOMSVGPoint> SVGSVGElement::CurrentTranslate() {
+  return DOMSVGPoint::GetTranslateTearOff(&mCurrentTranslate, this);
+}
+
+uint32_t SVGSVGElement::SuspendRedraw(uint32_t max_wait_milliseconds) {
+  // suspendRedraw is a no-op in Mozilla, so it doesn't matter what
+  // we return
+  return 1;
+}
+
+void SVGSVGElement::UnsuspendRedraw(uint32_t suspend_handle_id) {
+  // no-op
+}
+
+void SVGSVGElement::UnsuspendRedrawAll() {
+  // no-op
+}
+
+void SVGSVGElement::ForceRedraw() {
+  // no-op
+}
+
+void SVGSVGElement::PauseAnimations() {
+  if (mTimedDocumentRoot) {
+    mTimedDocumentRoot->Pause(SMILTimeContainer::PAUSE_SCRIPT);
+  }
+  // else we're not the outermost <svg> or not bound to a tree, so silently fail
+}
+
+void SVGSVGElement::UnpauseAnimations() {
+  if (mTimedDocumentRoot) {
+    mTimedDocumentRoot->Resume(SMILTimeContainer::PAUSE_SCRIPT);
+  }
+  // else we're not the outermost <svg> or not bound to a tree, so silently fail
+}
+
+bool SVGSVGElement::AnimationsPaused() {
+  SMILTimeContainer* root = GetTimedDocumentRoot();
+  return root && root->IsPausedByType(SMILTimeContainer::PAUSE_SCRIPT);
+}
+
+float SVGSVGElement::GetCurrentTimeAsFloat() {
+  SMILTimeContainer* root = GetTimedDocumentRoot();
+  if (root) {
+    double fCurrentTimeMs = double(root->GetCurrentTimeAsSMILTime());
+    return (float)(fCurrentTimeMs / PR_MSEC_PER_SEC);
+  }
+  return 0.f;
+}
+
+void SVGSVGElement::SetCurrentTime(float seconds) {
+  if (mTimedDocumentRoot) {
+    // Make sure the timegraph is up-to-date
+    FlushAnimations();
+    double fMilliseconds = double(seconds) * PR_MSEC_PER_SEC;
+    // Round to nearest whole number before converting, to avoid precision
+    // errors
+    SMILTime lMilliseconds = int64_t(NS_round(fMilliseconds));
+    mTimedDocumentRoot->SetCurrentTime(lMilliseconds);
+    AnimationNeedsResample();
+    // Trigger synchronous sample now, to:
+    //  - Make sure we get an up-to-date paint after this method
+    //  - re-enable event firing (it got disabled during seeking, and it
+    //  doesn't get re-enabled until the first sample after the seek -- so
+    //  let's make that happen now.)
+    FlushAnimations();
+  }
+  // else we're not the outermost <svg> or not bound to a tree, so silently fail
+}
+
+void SVGSVGElement::DeselectAll() {
+  nsIFrame* frame = GetPrimaryFrame();
+  if (frame) {
+    RefPtr<nsFrameSelection> frameSelection = frame->GetFrameSelection();
+    frameSelection->ClearNormalSelection();
+  }
+}
+
+already_AddRefed<DOMSVGNumber> SVGSVGElement::CreateSVGNumber() {
+  return do_AddRef(new DOMSVGNumber(this));
+}
+
+already_AddRefed<DOMSVGLength> SVGSVGElement::CreateSVGLength() {
+  return do_AddRef(new DOMSVGLength());
+}
+
+already_AddRefed<DOMSVGAngle> SVGSVGElement::CreateSVGAngle() {
+  return do_AddRef(new DOMSVGAngle(this));
+}
+
+already_AddRefed<DOMSVGPoint> SVGSVGElement::CreateSVGPoint() {
+  return do_AddRef(new DOMSVGPoint(Point(0, 0)));
+}
+
+already_AddRefed<SVGMatrix> SVGSVGElement::CreateSVGMatrix() {
+  return do_AddRef(new SVGMatrix());
+}
+
+already_AddRefed<SVGRect> SVGSVGElement::CreateSVGRect() {
+  return do_AddRef(new SVGRect(this));
+}
+
+already_AddRefed<DOMSVGTransform> SVGSVGElement::CreateSVGTransform() {
+  return do_AddRef(new DOMSVGTransform());
+}
+
+already_AddRefed<DOMSVGTransform> SVGSVGElement::CreateSVGTransformFromMatrix(
+    const DOMMatrix2DInit& matrix, ErrorResult& rv) {
+  return do_AddRef(new DOMSVGTransform(matrix, rv));
+}
+
+void SVGSVGElement::DidChangeTranslate() {
+  if (Document* doc = GetUncomposedDoc()) {
+    RefPtr<PresShell> presShell = doc->GetPresShell();
+    // now dispatch the appropriate event if we are the root element
+    if (presShell && IsRootSVGSVGElement()) {
+      nsEventStatus status = nsEventStatus_eIgnore;
+      WidgetEvent svgScrollEvent(true, eSVGScroll);
+      presShell->HandleDOMEventWithTarget(this, &svgScrollEvent, &status);
+      InvalidateTransformNotifyFrame();
+    }
+  }
+}
+
+//----------------------------------------------------------------------
+// SVGZoomAndPanValues
+uint16_t SVGSVGElement::ZoomAndPan() const {
+  return mEnumAttributes[ZOOMANDPAN].GetAnimValue();
+}
+
+void SVGSVGElement::SetZoomAndPan(uint16_t aZoomAndPan, ErrorResult& rv) {
+  if (aZoomAndPan == SVG_ZOOMANDPAN_DISABLE ||
+      aZoomAndPan == SVG_ZOOMANDPAN_MAGNIFY) {
+    ErrorResult nestedRv;
+    mEnumAttributes[ZOOMANDPAN].SetBaseValue(aZoomAndPan, this, nestedRv);
+    MOZ_ASSERT(!nestedRv.Failed(),
+               "We already validated our aZoomAndPan value!");
+    return;
+  }
+
+  rv.ThrowRangeError<MSG_INVALID_ZOOMANDPAN_VALUE_ERROR>();
+}
+
+//----------------------------------------------------------------------
+SMILTimeContainer* SVGSVGElement::GetTimedDocumentRoot() {
+  if (mTimedDocumentRoot) {
+    return mTimedDocumentRoot.get();
+  }
+
+  // We must not be the outermost <svg> element, try to find it
+  SVGSVGElement* outerSVGElement = SVGContentUtils::GetOuterSVGElement(this);
+
+  if (outerSVGElement) {
+    return outerSVGElement->GetTimedDocumentRoot();
+  }
+  // invalid structure
+  return nullptr;
+}
+//----------------------------------------------------------------------
+// SVGElement
+nsresult SVGSVGElement::BindToTree(BindContext& aContext, nsINode& aParent) {
+  SMILAnimationController* smilController = nullptr;
+
+  if (Document* doc = aContext.GetComposedDoc()) {
+    if ((smilController = doc->GetAnimationController())) {
+      // SMIL is enabled in this document
+      if (WillBeOutermostSVG(aParent)) {
+        // We'll be the outermost <svg> element.  We'll need a time container.
+        if (!mTimedDocumentRoot) {
+          mTimedDocumentRoot = MakeUnique<SMILTimeContainer>();
+        }
+      } else {
+        // We're a child of some other <svg> element, so we don't need our own
+        // time container. However, we need to make sure that we'll get a
+        // kick-start if we get promoted to be outermost later on.
+        mTimedDocumentRoot = nullptr;
+        mStartAnimationOnBindToTree = true;
+      }
+    }
+  }
+
+  nsresult rv = SVGGraphicsElement::BindToTree(aContext, aParent);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (mTimedDocumentRoot && smilController) {
+    rv = mTimedDocumentRoot->SetParent(smilController);
+    if (mStartAnimationOnBindToTree) {
+      mTimedDocumentRoot->Begin();
+      mStartAnimationOnBindToTree = false;
+    }
+  }
+
+  return rv;
+}
+
+void SVGSVGElement::UnbindFromTree(bool aNullParent) {
+  if (mTimedDocumentRoot) {
+    mTimedDocumentRoot->SetParent(nullptr);
+  }
+
+  SVGGraphicsElement::UnbindFromTree(aNullParent);
+}
+
+SVGAnimatedTransformList* SVGSVGElement::GetAnimatedTransformList(
+    uint32_t aFlags) {
+  if (!(aFlags & DO_ALLOCATE) && mSVGView && mSVGView->mTransforms) {
+    return mSVGView->mTransforms.get();
+  }
+  return SVGGraphicsElement::GetAnimatedTransformList(aFlags);
+}
+
+void SVGSVGElement::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
+  if (aVisitor.mEvent->mMessage == eSVGLoad) {
+    if (mTimedDocumentRoot) {
+      mTimedDocumentRoot->Begin();
+      // Set 'resample needed' flag, so that if any script calls a DOM method
+      // that requires up-to-date animations before our first sample callback,
+      // we'll force a synchronous sample.
+      AnimationNeedsResample();
+    }
+  }
+  SVGSVGElementBase::GetEventTargetParent(aVisitor);
+}
+
+bool SVGSVGElement::IsEventAttributeNameInternal(nsAtom* aName) {
+  /* The events in EventNameType_SVGSVG are for events that are only
+     applicable to outermost 'svg' elements. We don't check if we're an outer
+     'svg' element in case we're not inserted into the document yet, but since
+     the target of the events in question will always be the outermost 'svg'
+     element, this shouldn't cause any real problems.
+  */
+  return nsContentUtils::IsEventAttributeName(
+      aName, (EventNameType_SVGGraphic | EventNameType_SVGSVG));
+}
+
+//----------------------------------------------------------------------
+// public helpers:
+
+int32_t SVGSVGElement::GetIntrinsicWidth() {
+  if (mLengthAttributes[ATTR_WIDTH].IsPercentage()) {
+    return -1;
+  }
+  // Passing |this| as a SVGViewportElement* invokes the variant of GetAnimValue
+  // that uses the passed argument as the context, but that's fine since we
+  // know the length isn't a percentage so the context won't be used (and we
+  // need to pass the element to be able to resolve em/ex units).
+  float width = mLengthAttributes[ATTR_WIDTH].GetAnimValue(this);
+  return SVGUtils::ClampToInt(width);
+}
+
+int32_t SVGSVGElement::GetIntrinsicHeight() {
+  if (mLengthAttributes[ATTR_HEIGHT].IsPercentage()) {
+    return -1;
+  }
+  // Passing |this| as a SVGViewportElement* invokes the variant of GetAnimValue
+  // that uses the passed argument as the context, but that's fine since we
+  // know the length isn't a percentage so the context won't be used (and we
+  // need to pass the element to be able to resolve em/ex units).
+  float height = mLengthAttributes[ATTR_HEIGHT].GetAnimValue(this);
+  return SVGUtils::ClampToInt(height);
+}
+
+void SVGSVGElement::FlushImageTransformInvalidation() {
+  MOZ_ASSERT(!GetParent(), "Should only be called on root node");
+  MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(),
+             "Should only be called on image documents");
+
+  if (mImageNeedsTransformInvalidation) {
+    InvalidateTransformNotifyFrame();
+    mImageNeedsTransformInvalidation = false;
+  }
+}
+
+//----------------------------------------------------------------------
+// implementation helpers
+
+bool SVGSVGElement::WillBeOutermostSVG(nsINode& aParent) const {
+  nsINode* parent = &aParent;
+  while (parent && parent->IsSVGElement()) {
+    if (parent->IsSVGElement(nsGkAtoms::foreignObject)) {
+      // SVG in a foreignObject must have its own <svg> (SVGOuterSVGFrame).
+      return false;
+    }
+    if (parent->IsSVGElement(nsGkAtoms::svg)) {
+      return false;
+    }
+    parent = parent->GetParentOrShadowHostNode();
+  }
+
+  return true;
+}
+
+void SVGSVGElement::InvalidateTransformNotifyFrame() {
+  ISVGSVGFrame* svgframe = do_QueryFrame(GetPrimaryFrame());
+  // might fail this check if we've failed conditional processing
+  if (svgframe) {
+    svgframe->NotifyViewportOrTransformChanged(
+        ISVGDisplayableFrame::TRANSFORM_CHANGED);
+  }
+}
+
+SVGElement::EnumAttributesInfo SVGSVGElement::GetEnumInfo() {
+  return EnumAttributesInfo(mEnumAttributes, sEnumInfo, ArrayLength(sEnumInfo));
+}
+
+void SVGSVGElement::SetImageOverridePreserveAspectRatio(
+    const SVGPreserveAspectRatio& aPAR) {
+  MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(),
+             "should only override preserveAspectRatio in images");
+
+  bool hasViewBox = HasViewBox();
+  if (!hasViewBox && ShouldSynthesizeViewBox()) {
+    // My non-<svg:image> clients will have been painting me with a synthesized
+    // viewBox, but my <svg:image> client that's about to paint me now does NOT
+    // want that.  Need to tell ourselves to flush our transform.
+    mImageNeedsTransformInvalidation = true;
+  }
+
+  if (!hasViewBox) {
+    return;  // preserveAspectRatio irrelevant (only matters if we have viewBox)
+  }
+
+  if (SetPreserveAspectRatioProperty(aPAR)) {
+    mImageNeedsTransformInvalidation = true;
+  }
+}
+
+void SVGSVGElement::ClearImageOverridePreserveAspectRatio() {
+  MOZ_ASSERT(OwnerDoc()->IsBeingUsedAsImage(),
+             "should only override image preserveAspectRatio in images");
+
+  if (!HasViewBox() && ShouldSynthesizeViewBox()) {
+    // My non-<svg:image> clients will want to paint me with a synthesized
+    // viewBox, but my <svg:image> client that just painted me did NOT
+    // use that.  Need to tell ourselves to flush our transform.
+    mImageNeedsTransformInvalidation = true;
+  }
+
+  if (ClearPreserveAspectRatioProperty()) {
+    mImageNeedsTransformInvalidation = true;
+  }
+}
+
+bool SVGSVGElement::SetPreserveAspectRatioProperty(
+    const SVGPreserveAspectRatio& aPAR) {
+  SVGPreserveAspectRatio* pAROverridePtr = new SVGPreserveAspectRatio(aPAR);
+  nsresult rv =
+      SetProperty(nsGkAtoms::overridePreserveAspectRatio, pAROverridePtr,
+                  nsINode::DeleteProperty<SVGPreserveAspectRatio>, true);
+  MOZ_ASSERT(rv != NS_PROPTABLE_PROP_OVERWRITTEN,
+             "Setting override value when it's already set...?");
+
+  if (MOZ_UNLIKELY(NS_FAILED(rv))) {
+    // property-insertion failed (e.g. OOM in property-table code)
+    delete pAROverridePtr;
+    return false;
+  }
+  return true;
+}
+
+const SVGPreserveAspectRatio* SVGSVGElement::GetPreserveAspectRatioProperty()
+    const {
+  void* valPtr = GetProperty(nsGkAtoms::overridePreserveAspectRatio);
+  if (valPtr) {
+    return static_cast<SVGPreserveAspectRatio*>(valPtr);
+  }
+  return nullptr;
+}
+
+bool SVGSVGElement::ClearPreserveAspectRatioProperty() {
+  void* valPtr = TakeProperty(nsGkAtoms::overridePreserveAspectRatio);
+  bool didHaveProperty = !!valPtr;
+  delete static_cast<SVGPreserveAspectRatio*>(valPtr);
+  return didHaveProperty;
+}
+
+SVGPreserveAspectRatio SVGSVGElement::GetPreserveAspectRatioWithOverride()
+    const {
+  Document* doc = GetUncomposedDoc();
+  if (doc && doc->IsBeingUsedAsImage()) {
+    const SVGPreserveAspectRatio* pAROverridePtr =
+        GetPreserveAspectRatioProperty();
+    if (pAROverridePtr) {
+      return *pAROverridePtr;
+    }
+  }
+
+  SVGViewElement* viewElement = GetCurrentViewElement();
+
+  // This check is equivalent to "!HasViewBox() &&
+  // ShouldSynthesizeViewBox()". We're just holding onto the viewElement that
+  // HasViewBox() would look up, so that we don't have to look it up again
+  // later.
+  if (!((viewElement && viewElement->mViewBox.HasRect()) ||
+        (mSVGView && mSVGView->mViewBox.HasRect()) || mViewBox.HasRect()) &&
+      ShouldSynthesizeViewBox()) {
+    // If we're synthesizing a viewBox, use preserveAspectRatio="none";
+    return SVGPreserveAspectRatio(SVG_PRESERVEASPECTRATIO_NONE,
+                                  SVG_MEETORSLICE_SLICE);
+  }
+
+  if (viewElement && viewElement->mPreserveAspectRatio.IsExplicitlySet()) {
+    return viewElement->mPreserveAspectRatio.GetAnimValue();
+  }
+  if (mSVGView && mSVGView->mPreserveAspectRatio.IsExplicitlySet()) {
+    return mSVGView->mPreserveAspectRatio.GetAnimValue();
+  }
+  return mPreserveAspectRatio.GetAnimValue();
+}
+
+SVGViewElement* SVGSVGElement::GetCurrentViewElement() const {
+  if (mCurrentViewID) {
+    // XXXsmaug It is unclear how this should work in case we're in Shadow DOM.
+    Document* doc = GetUncomposedDoc();
+    if (doc) {
+      Element* element = doc->GetElementById(*mCurrentViewID);
+      if (element && element->IsSVGElement(nsGkAtoms::view)) {
+        return static_cast<SVGViewElement*>(element);
+      }
+    }
+  }
+  return nullptr;
+}
+
+const SVGAnimatedViewBox& SVGSVGElement::GetViewBoxInternal() const {
+  SVGViewElement* viewElement = GetCurrentViewElement();
+
+  if (viewElement && viewElement->mViewBox.HasRect()) {
+    return viewElement->mViewBox;
+  }
+  if (mSVGView && mSVGView->mViewBox.HasRect()) {
+    return mSVGView->mViewBox;
+  }
+
+  return mViewBox;
+}
+
+SVGAnimatedTransformList* SVGSVGElement::GetTransformInternal() const {
+  return (mSVGView && mSVGView->mTransforms) ? mSVGView->mTransforms.get()
+                                             : mTransforms.get();
+}
+
+}  // namespace dom
+}  // namespace mozilla