Add m-esr52 at 52.6.0

1 files changed, 1001 insertions, 0 deletions

diff --git a/layout/svg/nsSVGEffects.cpp b/layout/svg/nsSVGEffects.cpp
new file mode 100644
index 000000000..eac094a91
--- /dev/null
+++ b/layout/svg/nsSVGEffects.cpp
@@ -0,0 +1,1001 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+// Main header first:
+#include "nsSVGEffects.h"
+
+// Keep others in (case-insensitive) order:
+#include "mozilla/RestyleManagerHandle.h"
+#include "mozilla/RestyleManagerHandleInlines.h"
+#include "nsCSSFrameConstructor.h"
+#include "nsISupportsImpl.h"
+#include "nsSVGClipPathFrame.h"
+#include "nsSVGPaintServerFrame.h"
+#include "nsSVGPathGeometryElement.h"
+#include "nsSVGFilterFrame.h"
+#include "nsSVGMaskFrame.h"
+#include "nsIReflowCallback.h"
+#include "nsCycleCollectionParticipant.h"
+#include "SVGUseElement.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+void
+nsSVGRenderingObserver::StartListening()
+{
+  Element* target = GetTarget();
+  if (target) {
+    target->AddMutationObserver(this);
+  }
+}
+
+void
+nsSVGRenderingObserver::StopListening()
+{
+  Element* target = GetTarget();
+
+  if (target) {
+    target->RemoveMutationObserver(this);
+    if (mInObserverList) {
+      nsSVGEffects::RemoveRenderingObserver(target, this);
+      mInObserverList = false;
+    }
+  }
+  NS_ASSERTION(!mInObserverList, "still in an observer list?");
+}
+
+static nsSVGRenderingObserverList *
+GetObserverList(Element *aElement)
+{
+  return static_cast<nsSVGRenderingObserverList*>
+    (aElement->GetProperty(nsGkAtoms::renderingobserverlist));
+}
+
+Element*
+nsSVGRenderingObserver::GetReferencedElement()
+{
+  Element* target = GetTarget();
+#ifdef DEBUG
+  if (target) {
+    nsSVGRenderingObserverList *observerList = GetObserverList(target);
+    bool inObserverList = observerList && observerList->Contains(this);
+    NS_ASSERTION(inObserverList == mInObserverList, "failed to track whether we're in our referenced element's observer list!");
+  } else {
+    NS_ASSERTION(!mInObserverList, "In whose observer list are we, then?");
+  }
+#endif
+  if (target && !mInObserverList) {
+    nsSVGEffects::AddRenderingObserver(target, this);
+    mInObserverList = true;
+  }
+  return target;
+}
+
+nsIFrame*
+nsSVGRenderingObserver::GetReferencedFrame()
+{
+  Element* referencedElement = GetReferencedElement();
+  return referencedElement ? referencedElement->GetPrimaryFrame() : nullptr;
+}
+
+nsIFrame*
+nsSVGRenderingObserver::GetReferencedFrame(nsIAtom* aFrameType, bool* aOK)
+{
+  nsIFrame* frame = GetReferencedFrame();
+  if (frame) {
+    if (frame->GetType() == aFrameType)
+      return frame;
+    if (aOK) {
+      *aOK = false;
+    }
+  }
+  return nullptr;
+}
+
+void
+nsSVGRenderingObserver::InvalidateViaReferencedElement()
+{
+  mInObserverList = false;
+  DoUpdate();
+}
+
+void
+nsSVGRenderingObserver::NotifyEvictedFromRenderingObserverList()
+{
+  mInObserverList = false; // We've been removed from rendering-obs. list.
+  StopListening();            // Remove ourselves from mutation-obs. list.
+}
+
+void
+nsSVGRenderingObserver::AttributeChanged(nsIDocument* aDocument,
+                                         dom::Element* aElement,
+                                         int32_t aNameSpaceID,
+                                         nsIAtom* aAttribute,
+                                         int32_t aModType,
+                                         const nsAttrValue* aOldValue)
+{
+  // An attribute belonging to the element that we are observing *or one of its
+  // descendants* has changed.
+  //
+  // In the case of observing a gradient element, say, we want to know if any
+  // of its 'stop' element children change, but we don't actually want to do
+  // anything for changes to SMIL element children, for example. Maybe it's not
+  // worth having logic to optimize for that, but in most cases it could be a
+  // small check?
+  //
+  // XXXjwatt: do we really want to blindly break the link between our
+  // observers and ourselves for all attribute changes? For non-ID changes
+  // surely that is unnecessary.
+
+  DoUpdate();
+}
+
+void
+nsSVGRenderingObserver::ContentAppended(nsIDocument* aDocument,
+                                        nsIContent* aContainer,
+                                        nsIContent* aFirstNewContent,
+                                        int32_t /* unused */)
+{
+  DoUpdate();
+}
+
+void
+nsSVGRenderingObserver::ContentInserted(nsIDocument* aDocument,
+                                        nsIContent* aContainer,
+                                        nsIContent* aChild,
+                                        int32_t /* unused */)
+{
+  DoUpdate();
+}
+
+void
+nsSVGRenderingObserver::ContentRemoved(nsIDocument* aDocument,
+                                       nsIContent* aContainer,
+                                       nsIContent* aChild,
+                                       int32_t aIndexInContainer,
+                                       nsIContent* aPreviousSibling)
+{
+  DoUpdate();
+}
+
+/**
+ * Note that in the current setup there are two separate observer lists.
+ *
+ * In nsSVGIDRenderingObserver's ctor, the new object adds itself to the
+ * mutation observer list maintained by the referenced element. In this way the
+ * nsSVGIDRenderingObserver is notified if there are any attribute or content
+ * tree changes to the element or any of its *descendants*.
+ *
+ * In nsSVGIDRenderingObserver::GetReferencedElement() the
+ * nsSVGIDRenderingObserver object also adds itself to an
+ * nsSVGRenderingObserverList object belonging to the referenced
+ * element.
+ *
+ * XXX: it would be nice to have a clear and concise executive summary of the
+ * benefits/necessity of maintaining a second observer list.
+ */
+
+nsSVGIDRenderingObserver::nsSVGIDRenderingObserver(nsIURI* aURI,
+                                                   nsIContent* aObservingContent,
+                                                   bool aReferenceImage)
+  : mElement(this)
+{
+  // Start watching the target element
+  mElement.Reset(aObservingContent, aURI, true, aReferenceImage);
+  StartListening();
+}
+
+nsSVGIDRenderingObserver::~nsSVGIDRenderingObserver()
+{
+  StopListening();
+}
+
+void
+nsSVGIDRenderingObserver::DoUpdate()
+{
+  if (mElement.get() && mInObserverList) {
+    nsSVGEffects::RemoveRenderingObserver(mElement.get(), this);
+    mInObserverList = false;
+  }
+}
+
+void
+nsSVGFrameReferenceFromProperty::Detach()
+{
+  mFrame = nullptr;
+  mFramePresShell = nullptr;
+}
+
+nsIFrame*
+nsSVGFrameReferenceFromProperty::Get()
+{
+  if (mFramePresShell && mFramePresShell->IsDestroying()) {
+    // mFrame is no longer valid.
+    Detach();
+  }
+  return mFrame;
+}
+
+NS_IMPL_ISUPPORTS(nsSVGRenderingObserverProperty, nsIMutationObserver)
+
+void
+nsSVGRenderingObserverProperty::DoUpdate()
+{
+  nsSVGIDRenderingObserver::DoUpdate();
+
+  nsIFrame* frame = mFrameReference.Get();
+  if (frame && frame->IsFrameOfType(nsIFrame::eSVG)) {
+    // Changes should propagate out to things that might be observing
+    // the referencing frame or its ancestors.
+    nsLayoutUtils::PostRestyleEvent(
+      frame->GetContent()->AsElement(), nsRestyleHint(0),
+      nsChangeHint_InvalidateRenderingObservers);
+  }
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsSVGFilterReference)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsSVGFilterReference)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsSVGFilterReference)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsSVGFilterReference)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mElement)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsSVGFilterReference)
+  tmp->StopListening();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mElement);
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsSVGFilterReference)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsSVGIDRenderingObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIMutationObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISVGFilterReference)
+NS_INTERFACE_MAP_END
+
+nsSVGFilterFrame *
+nsSVGFilterReference::GetFilterFrame()
+{
+  return static_cast<nsSVGFilterFrame *>
+    (GetReferencedFrame(nsGkAtoms::svgFilterFrame, nullptr));
+}
+
+void
+nsSVGFilterReference::DoUpdate()
+{
+  nsSVGIDRenderingObserver::DoUpdate();
+
+  if (mFilterChainObserver) {
+    mFilterChainObserver->Invalidate();
+  }
+}
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsSVGFilterChainObserver)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsSVGFilterChainObserver)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsSVGFilterChainObserver)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsSVGFilterChainObserver)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mReferences)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsSVGFilterChainObserver)
+  tmp->DetachReferences();
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mReferences);
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsSVGFilterChainObserver)
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+nsSVGFilterChainObserver::nsSVGFilterChainObserver(const nsTArray<nsStyleFilter>& aFilters,
+                                                   nsIContent* aFilteredElement,
+                                                   nsIFrame* aFilteredFrame)
+{
+  for (uint32_t i = 0; i < aFilters.Length(); i++) {
+    if (aFilters[i].GetType() != NS_STYLE_FILTER_URL)
+      continue;
+
+    // aFilteredFrame can be null if this filter belongs to a
+    // CanvasRenderingContext2D.
+    nsCOMPtr<nsIURI> filterURL = aFilteredFrame
+      ? nsSVGEffects::GetFilterURI(aFilteredFrame, i)
+      : aFilters[i].GetURL()->ResolveLocalRef(aFilteredElement);
+
+    RefPtr<nsSVGFilterReference> reference =
+      new nsSVGFilterReference(filterURL, aFilteredElement, this);
+    mReferences.AppendElement(reference);
+  }
+}
+
+nsSVGFilterChainObserver::~nsSVGFilterChainObserver()
+{
+  DetachReferences();
+}
+
+bool
+nsSVGFilterChainObserver::ReferencesValidResources()
+{
+  for (uint32_t i = 0; i < mReferences.Length(); i++) {
+    if (!mReferences[i]->ReferencesValidResource())
+      return false;
+  }
+  return true;
+}
+
+bool
+nsSVGFilterChainObserver::IsInObserverLists() const
+{
+  for (uint32_t i = 0; i < mReferences.Length(); i++) {
+    if (!mReferences[i]->IsInObserverList())
+      return false;
+  }
+  return true;
+}
+
+void
+nsSVGFilterProperty::DoUpdate()
+{
+  nsIFrame* frame = mFrameReference.Get();
+  if (!frame)
+    return;
+
+  // Repaint asynchronously in case the filter frame is being torn down
+  nsChangeHint changeHint =
+    nsChangeHint(nsChangeHint_RepaintFrame);
+
+  if (frame && frame->IsFrameOfType(nsIFrame::eSVG)) {
+    // Changes should propagate out to things that might be observing
+    // the referencing frame or its ancestors.
+    changeHint |= nsChangeHint_InvalidateRenderingObservers;
+  }
+
+  // Don't need to request UpdateOverflow if we're being reflowed.
+  if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
+    changeHint |= nsChangeHint_UpdateOverflow;
+  }
+  frame->PresContext()->RestyleManager()->PostRestyleEvent(
+    frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
+}
+
+void
+nsSVGMarkerProperty::DoUpdate()
+{
+  nsSVGRenderingObserverProperty::DoUpdate();
+
+  nsIFrame* frame = mFrameReference.Get();
+  if (!frame)
+    return;
+
+  NS_ASSERTION(frame->IsFrameOfType(nsIFrame::eSVG), "SVG frame expected");
+
+  // Repaint asynchronously in case the marker frame is being torn down
+  nsChangeHint changeHint =
+    nsChangeHint(nsChangeHint_RepaintFrame);
+
+  // Don't need to request ReflowFrame if we're being reflowed.
+  if (!(frame->GetStateBits() & NS_FRAME_IN_REFLOW)) {
+    changeHint |= nsChangeHint_InvalidateRenderingObservers;
+    // XXXjwatt: We need to unify SVG into standard reflow so we can just use
+    // nsChangeHint_NeedReflow | nsChangeHint_NeedDirtyReflow here.
+    // XXXSDL KILL THIS!!!
+    nsSVGUtils::ScheduleReflowSVG(frame);
+  }
+  frame->PresContext()->RestyleManager()->PostRestyleEvent(
+    frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
+}
+
+NS_IMPL_ISUPPORTS(nsSVGMaskProperty, nsISupports)
+
+nsSVGMaskProperty::nsSVGMaskProperty(nsIFrame* aFrame)
+{
+  const nsStyleSVGReset *svgReset = aFrame->StyleSVGReset();
+
+  for (uint32_t i = 0; i < svgReset->mMask.mImageCount; i++) {
+    nsCOMPtr<nsIURI> maskUri = nsSVGEffects::GetMaskURI(aFrame, i);
+    nsSVGPaintingProperty* prop = new nsSVGPaintingProperty(maskUri, aFrame,
+                                                            false);
+    mProperties.AppendElement(prop);
+  }
+}
+
+bool
+nsSVGTextPathProperty::TargetIsValid()
+{
+  Element* target = GetTarget();
+  return target && target->IsSVGElement(nsGkAtoms::path);
+}
+
+void
+nsSVGTextPathProperty::DoUpdate()
+{
+  nsSVGRenderingObserverProperty::DoUpdate();
+
+  nsIFrame* frame = mFrameReference.Get();
+  if (!frame)
+    return;
+
+  NS_ASSERTION(frame->IsFrameOfType(nsIFrame::eSVG) || frame->IsSVGText(),
+               "SVG frame expected");
+
+  // Avoid getting into an infinite loop of reflows if the <textPath> is
+  // pointing to one of its ancestors.  TargetIsValid returns true iff
+  // the target element is a <path> element, and we would not have this
+  // nsSVGTextPathProperty if this <textPath> were a descendant of the
+  // target <path>.
+  //
+  // Note that we still have to post the restyle event when we
+  // change from being valid to invalid, so that mPositions on the
+  // SVGTextFrame gets updated, skipping the <textPath>, ensuring
+  // that nothing gets painted for that element.
+  bool nowValid = TargetIsValid();
+  if (!mValid && !nowValid) {
+    // Just return if we were previously invalid, and are still invalid.
+    return;
+  }
+  mValid = nowValid;
+
+  // Repaint asynchronously in case the path frame is being torn down
+  nsChangeHint changeHint =
+    nsChangeHint(nsChangeHint_RepaintFrame | nsChangeHint_UpdateTextPath);
+  frame->PresContext()->RestyleManager()->PostRestyleEvent(
+    frame->GetContent()->AsElement(), nsRestyleHint(0), changeHint);
+}
+
+static void
+InvalidateAllContinuations(nsIFrame* aFrame)
+{
+  for (nsIFrame* f = aFrame; f;
+       f = nsLayoutUtils::GetNextContinuationOrIBSplitSibling(f)) {
+    f->InvalidateFrame();
+  }
+}
+
+void
+nsSVGPaintingProperty::DoUpdate()
+{
+  nsSVGRenderingObserverProperty::DoUpdate();
+
+  nsIFrame* frame = mFrameReference.Get();
+  if (!frame)
+    return;
+
+  if (frame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
+    nsLayoutUtils::PostRestyleEvent(
+      frame->GetContent()->AsElement(), nsRestyleHint(0),
+      nsChangeHint_InvalidateRenderingObservers);
+    frame->InvalidateFrameSubtree();
+  } else {
+    InvalidateAllContinuations(frame);
+  }
+}
+
+static nsSVGFilterProperty*
+GetOrCreateFilterProperty(nsIFrame* aFrame)
+{
+  const nsStyleEffects* effects = aFrame->StyleEffects();
+  if (!effects->HasFilters())
+    return nullptr;
+
+  FrameProperties props = aFrame->Properties();
+  nsSVGFilterProperty *prop = props.Get(nsSVGEffects::FilterProperty());
+  if (prop)
+    return prop;
+  prop = new nsSVGFilterProperty(effects->mFilters, aFrame);
+  NS_ADDREF(prop);
+  props.Set(nsSVGEffects::FilterProperty(), prop);
+  return prop;
+}
+
+static nsSVGMaskProperty*
+GetOrCreateMaskProperty(nsIFrame* aFrame)
+{
+  FrameProperties props = aFrame->Properties();
+  nsSVGMaskProperty *prop = props.Get(nsSVGEffects::MaskProperty());
+  if (prop)
+    return prop;
+
+  prop = new nsSVGMaskProperty(aFrame);
+  NS_ADDREF(prop);
+  props.Set(nsSVGEffects::MaskProperty(), prop);
+  return prop;
+}
+
+template<class T>
+static T*
+GetEffectProperty(nsIURI* aURI, nsIFrame* aFrame,
+  const mozilla::FramePropertyDescriptor<T>* aProperty)
+{
+  if (!aURI)
+    return nullptr;
+
+  FrameProperties props = aFrame->Properties();
+  T* prop = props.Get(aProperty);
+  if (prop)
+    return prop;
+  prop = new T(aURI, aFrame, false);
+  NS_ADDREF(prop);
+  props.Set(aProperty, prop);
+  return prop;
+}
+
+nsSVGMarkerProperty*
+nsSVGEffects::GetMarkerProperty(nsIURI* aURI, nsIFrame* aFrame,
+  const mozilla::FramePropertyDescriptor<nsSVGMarkerProperty>* aProperty)
+{
+  MOZ_ASSERT(aFrame->GetType() == nsGkAtoms::svgPathGeometryFrame &&
+             static_cast<nsSVGPathGeometryElement*>(aFrame->GetContent())->IsMarkable(),
+             "Bad frame");
+  return GetEffectProperty(aURI, aFrame, aProperty);
+}
+
+nsSVGTextPathProperty*
+nsSVGEffects::GetTextPathProperty(nsIURI* aURI, nsIFrame* aFrame,
+  const mozilla::FramePropertyDescriptor<nsSVGTextPathProperty>* aProperty)
+{
+  return GetEffectProperty(aURI, aFrame, aProperty);
+}
+
+nsSVGPaintingProperty*
+nsSVGEffects::GetPaintingProperty(nsIURI* aURI, nsIFrame* aFrame,
+  const mozilla::FramePropertyDescriptor<nsSVGPaintingProperty>* aProperty)
+{
+  return GetEffectProperty(aURI, aFrame, aProperty);
+}
+
+nsSVGPaintingProperty*
+nsSVGEffects::GetPaintingPropertyForURI(nsIURI* aURI, nsIFrame* aFrame,
+  URIObserverHashtablePropertyDescriptor aProperty)
+{
+  if (!aURI)
+    return nullptr;
+
+  FrameProperties props = aFrame->Properties();
+  nsSVGEffects::URIObserverHashtable *hashtable = props.Get(aProperty);
+  if (!hashtable) {
+    hashtable = new nsSVGEffects::URIObserverHashtable();
+    props.Set(aProperty, hashtable);
+  }
+  nsSVGPaintingProperty* prop =
+    static_cast<nsSVGPaintingProperty*>(hashtable->GetWeak(aURI));
+  if (!prop) {
+    bool watchImage = aProperty == nsSVGEffects::BackgroundImageProperty();
+    prop = new nsSVGPaintingProperty(aURI, aFrame, watchImage);
+    hashtable->Put(aURI, prop);
+  }
+  return prop;
+}
+
+nsSVGEffects::EffectProperties
+nsSVGEffects::GetEffectProperties(nsIFrame* aFrame)
+{
+  NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
+
+  EffectProperties result;
+  const nsStyleSVGReset *style = aFrame->StyleSVGReset();
+
+  result.mFilter = GetOrCreateFilterProperty(aFrame);
+
+  if (style->mClipPath.GetType() == StyleShapeSourceType::URL) {
+    nsCOMPtr<nsIURI> pathURI = nsSVGEffects::GetClipPathURI(aFrame);
+    result.mClipPath =
+      GetPaintingProperty(pathURI, aFrame, ClipPathProperty());
+  } else {
+    result.mClipPath = nullptr;
+  }
+
+  MOZ_ASSERT(style->mMask.mImageCount > 0);
+  result.mMask = style->mMask.HasLayerWithImage()
+                 ? GetOrCreateMaskProperty(aFrame) : nullptr;
+
+  return result;
+}
+
+nsSVGPaintServerFrame *
+nsSVGEffects::GetPaintServer(nsIFrame* aTargetFrame,
+                             nsStyleSVGPaint nsStyleSVG::* aPaint,
+                             PaintingPropertyDescriptor aType)
+{
+  const nsStyleSVG* svgStyle = aTargetFrame->StyleSVG();
+  if ((svgStyle->*aPaint).Type() != eStyleSVGPaintType_Server)
+    return nullptr;
+
+  // If we're looking at a frame within SVG text, then we need to look up
+  // to find the right frame to get the painting property off.  We should at
+  // least look up past a text frame, and if the text frame's parent is the
+  // anonymous block frame, then we look up to its parent (the SVGTextFrame).
+  nsIFrame* frame = aTargetFrame;
+  if (frame->GetContent()->IsNodeOfType(nsINode::eTEXT)) {
+    frame = frame->GetParent();
+    nsIFrame* grandparent = frame->GetParent();
+    if (grandparent && grandparent->GetType() == nsGkAtoms::svgTextFrame) {
+      frame = grandparent;
+    }
+  }
+
+  nsCOMPtr<nsIURI> paintServerURL = nsSVGEffects::GetPaintURI(frame, aPaint);
+  nsSVGPaintingProperty *property =
+    nsSVGEffects::GetPaintingProperty(paintServerURL, frame, aType);
+  if (!property)
+    return nullptr;
+  nsIFrame *result = property->GetReferencedFrame();
+  if (!result)
+    return nullptr;
+
+  nsIAtom *type = result->GetType();
+  if (type != nsGkAtoms::svgLinearGradientFrame &&
+      type != nsGkAtoms::svgRadialGradientFrame &&
+      type != nsGkAtoms::svgPatternFrame)
+    return nullptr;
+
+  return static_cast<nsSVGPaintServerFrame*>(result);
+}
+
+nsSVGClipPathFrame *
+nsSVGEffects::EffectProperties::GetClipPathFrame(bool* aOK)
+{
+  if (!mClipPath)
+    return nullptr;
+  nsSVGClipPathFrame *frame = static_cast<nsSVGClipPathFrame *>
+    (mClipPath->GetReferencedFrame(nsGkAtoms::svgClipPathFrame, aOK));
+  if (frame && aOK && *aOK) {
+    *aOK = frame->IsValid();
+  }
+  return frame;
+}
+
+nsSVGMaskFrame *
+nsSVGEffects::EffectProperties::GetFirstMaskFrame(bool* aOK)
+{
+  if (!mMask) {
+    return nullptr;
+  }
+
+  const nsTArray<RefPtr<nsSVGPaintingProperty>>& props = mMask->GetProps();
+
+  if (props.IsEmpty()) {
+    return nullptr;
+  }
+
+  return static_cast<nsSVGMaskFrame *>
+    (props[0]->GetReferencedFrame(nsGkAtoms::svgMaskFrame, aOK));
+}
+
+nsTArray<nsSVGMaskFrame *>
+nsSVGEffects::EffectProperties::GetMaskFrames()
+{
+  nsTArray<nsSVGMaskFrame *> result;
+  if (!mMask)
+    return result;
+
+  bool ok = false;
+  const nsTArray<RefPtr<nsSVGPaintingProperty>>& props = mMask->GetProps();
+  for (size_t i = 0; i < props.Length(); i++) {
+    nsSVGMaskFrame* maskFrame =
+      static_cast<nsSVGMaskFrame *>(props[i]->GetReferencedFrame(
+                                                nsGkAtoms::svgMaskFrame, &ok));
+    result.AppendElement(maskFrame);
+  }
+
+  return result;
+}
+
+void
+nsSVGEffects::UpdateEffects(nsIFrame* aFrame)
+{
+  NS_ASSERTION(aFrame->GetContent()->IsElement(),
+               "aFrame's content should be an element");
+
+  FrameProperties props = aFrame->Properties();
+  props.Delete(FilterProperty());
+  props.Delete(MaskProperty());
+  props.Delete(ClipPathProperty());
+  props.Delete(MarkerBeginProperty());
+  props.Delete(MarkerMiddleProperty());
+  props.Delete(MarkerEndProperty());
+  props.Delete(FillProperty());
+  props.Delete(StrokeProperty());
+  props.Delete(BackgroundImageProperty());
+
+  // Ensure that the filter is repainted correctly
+  // We can't do that in DoUpdate as the referenced frame may not be valid
+  GetOrCreateFilterProperty(aFrame);
+
+  if (aFrame->GetType() == nsGkAtoms::svgPathGeometryFrame &&
+      static_cast<nsSVGPathGeometryElement*>(aFrame->GetContent())->IsMarkable()) {
+    // Set marker properties here to avoid reference loops
+    nsCOMPtr<nsIURI> markerURL =
+      GetMarkerURI(aFrame, &nsStyleSVG::mMarkerStart);
+    GetMarkerProperty(markerURL, aFrame, MarkerBeginProperty());
+    markerURL = GetMarkerURI(aFrame, &nsStyleSVG::mMarkerMid);
+    GetMarkerProperty(markerURL, aFrame, MarkerMiddleProperty());
+    markerURL = GetMarkerURI(aFrame, &nsStyleSVG::mMarkerEnd);
+    GetMarkerProperty(markerURL, aFrame, MarkerEndProperty());
+  }
+}
+
+nsSVGFilterProperty*
+nsSVGEffects::GetFilterProperty(nsIFrame* aFrame)
+{
+  NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
+
+  if (!aFrame->StyleEffects()->HasFilters())
+    return nullptr;
+
+  return aFrame->Properties().Get(FilterProperty());
+}
+
+void
+nsSVGRenderingObserverList::InvalidateAll()
+{
+  if (mObservers.Count() == 0)
+    return;
+
+  AutoTArray<nsSVGRenderingObserver*,10> observers;
+
+  for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
+    observers.AppendElement(it.Get()->GetKey());
+  }
+  mObservers.Clear();
+
+  for (uint32_t i = 0; i < observers.Length(); ++i) {
+    observers[i]->InvalidateViaReferencedElement();
+  }
+}
+
+void
+nsSVGRenderingObserverList::InvalidateAllForReflow()
+{
+  if (mObservers.Count() == 0)
+    return;
+
+  AutoTArray<nsSVGRenderingObserver*,10> observers;
+
+  for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
+    nsSVGRenderingObserver* obs = it.Get()->GetKey();
+    if (obs->ObservesReflow()) {
+      observers.AppendElement(obs);
+      it.Remove();
+    }
+  }
+
+  for (uint32_t i = 0; i < observers.Length(); ++i) {
+    observers[i]->InvalidateViaReferencedElement();
+  }
+}
+
+void
+nsSVGRenderingObserverList::RemoveAll()
+{
+  AutoTArray<nsSVGRenderingObserver*,10> observers;
+
+  for (auto it = mObservers.Iter(); !it.Done(); it.Next()) {
+    observers.AppendElement(it.Get()->GetKey());
+  }
+  mObservers.Clear();
+
+  // Our list is now cleared.  We need to notify the observers we've removed,
+  // so they can update their state & remove themselves as mutation-observers.
+  for (uint32_t i = 0; i < observers.Length(); ++i) {
+    observers[i]->NotifyEvictedFromRenderingObserverList();
+  }
+}
+
+void
+nsSVGEffects::AddRenderingObserver(Element* aElement,
+                                   nsSVGRenderingObserver* aObserver)
+{
+  nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
+  if (!observerList) {
+    observerList = new nsSVGRenderingObserverList();
+    if (!observerList)
+      return;
+    aElement->SetProperty(nsGkAtoms::renderingobserverlist, observerList,
+                          nsINode::DeleteProperty<nsSVGRenderingObserverList>);
+  }
+  aElement->SetHasRenderingObservers(true);
+  observerList->Add(aObserver);
+}
+
+void
+nsSVGEffects::RemoveRenderingObserver(Element* aElement,
+                                      nsSVGRenderingObserver* aObserver)
+{
+  nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
+  if (observerList) {
+    NS_ASSERTION(observerList->Contains(aObserver),
+                 "removing observer from an element we're not observing?");
+    observerList->Remove(aObserver);
+    if (observerList->IsEmpty()) {
+      aElement->SetHasRenderingObservers(false);
+    }
+  }
+}
+
+void
+nsSVGEffects::RemoveAllRenderingObservers(Element* aElement)
+{
+  nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
+  if (observerList) {
+    observerList->RemoveAll();
+    aElement->SetHasRenderingObservers(false);
+  }
+}
+
+void
+nsSVGEffects::InvalidateRenderingObservers(nsIFrame* aFrame)
+{
+  NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame must be first continuation");
+
+  nsIContent* content = aFrame->GetContent();
+  if (!content || !content->IsElement())
+    return;
+
+  // If the rendering has changed, the bounds may well have changed too:
+  aFrame->Properties().Delete(nsSVGUtils::ObjectBoundingBoxProperty());
+
+  nsSVGRenderingObserverList *observerList =
+    GetObserverList(content->AsElement());
+  if (observerList) {
+    observerList->InvalidateAll();
+    return;
+  }
+
+  // Check ancestor SVG containers. The root frame cannot be of type
+  // eSVGContainer so we don't have to check f for null here.
+  for (nsIFrame *f = aFrame->GetParent();
+       f->IsFrameOfType(nsIFrame::eSVGContainer); f = f->GetParent()) {
+    if (f->GetContent()->IsElement()) {
+      observerList = GetObserverList(f->GetContent()->AsElement());
+      if (observerList) {
+        observerList->InvalidateAll();
+        return;
+      }
+    }
+  }
+}
+
+void
+nsSVGEffects::InvalidateDirectRenderingObservers(Element* aElement, uint32_t aFlags /* = 0 */)
+{
+  nsIFrame* frame = aElement->GetPrimaryFrame();
+  if (frame) {
+    // If the rendering has changed, the bounds may well have changed too:
+    frame->Properties().Delete(nsSVGUtils::ObjectBoundingBoxProperty());
+  }
+
+  if (aElement->HasRenderingObservers()) {
+    nsSVGRenderingObserverList *observerList = GetObserverList(aElement);
+    if (observerList) {
+      if (aFlags & INVALIDATE_REFLOW) {
+        observerList->InvalidateAllForReflow();
+      } else {
+        observerList->InvalidateAll();
+      }
+    }
+  }
+}
+
+void
+nsSVGEffects::InvalidateDirectRenderingObservers(nsIFrame* aFrame, uint32_t aFlags /* = 0 */)
+{
+  nsIContent* content = aFrame->GetContent();
+  if (content && content->IsElement()) {
+    InvalidateDirectRenderingObservers(content->AsElement(), aFlags);
+  }
+}
+
+static already_AddRefed<nsIURI>
+ResolveURLUsingLocalRef(nsIFrame* aFrame, const css::URLValueData* aURL)
+{
+  MOZ_ASSERT(aFrame);
+
+  if (!aURL) {
+    return nullptr;
+  }
+
+  // Non-local-reference URL.
+  if (!aURL->IsLocalRef()) {
+    nsCOMPtr<nsIURI> result = aURL->GetURI();
+    return result.forget();
+  }
+
+  // For a local-reference URL, resolve that fragment against the current
+  // document that relative URLs are resolved against.
+  nsIContent* content = aFrame->GetContent();
+  nsCOMPtr<nsIURI> baseURI = content->OwnerDoc()->GetDocumentURI();
+
+  if (content->IsInAnonymousSubtree()) {
+    nsIContent* bindingParent = content->GetBindingParent();
+    nsCOMPtr<nsIURI> originalURI;
+
+    // content is in a shadow tree.  If this URL was specified in the subtree
+    // referenced by the <use>(or -moz-binding) element, and that subtree came
+    // from a separate resource document, then we want the fragment-only URL
+    // to resolve to an element from the resource document.  Otherwise, the
+    // URL was specified somewhere in the document with the <use> element, and
+    // we want the fragment-only URL to resolve to an element in that document.
+    if (bindingParent) {
+      if (content->IsAnonymousContentInSVGUseSubtree()) {
+        SVGUseElement* useElement = static_cast<SVGUseElement*>(bindingParent);
+        originalURI = useElement->GetSourceDocURI();
+      } else {
+        nsXBLBinding* binding = bindingParent->GetXBLBinding();
+        if (binding) {
+          originalURI = binding->GetSourceDocURI();
+        } else {
+          MOZ_ASSERT(content->IsInNativeAnonymousSubtree(),
+                     "an non-native anonymous tree which is not from "
+                     "an XBL binding?");
+        }
+      }
+
+      if (originalURI && aURL->EqualsExceptRef(originalURI)) {
+        baseURI = originalURI;
+      }
+    }
+  }
+
+  return aURL->ResolveLocalRef(baseURI);
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetMarkerURI(nsIFrame* aFrame,
+                           RefPtr<css::URLValue> nsStyleSVG::* aMarker)
+{
+  return ResolveURLUsingLocalRef(aFrame, aFrame->StyleSVG()->*aMarker);
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetClipPathURI(nsIFrame* aFrame)
+{
+  const nsStyleSVGReset* svgResetStyle = aFrame->StyleSVGReset();
+  MOZ_ASSERT(svgResetStyle->mClipPath.GetType() == StyleShapeSourceType::URL);
+
+  css::URLValue* url = svgResetStyle->mClipPath.GetURL();
+  return ResolveURLUsingLocalRef(aFrame, url);
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetFilterURI(nsIFrame* aFrame, uint32_t aIndex)
+{
+  const nsStyleEffects* effects = aFrame->StyleEffects();
+  MOZ_ASSERT(effects->mFilters.Length() > aIndex);
+  MOZ_ASSERT(effects->mFilters[aIndex].GetType() == NS_STYLE_FILTER_URL);
+
+  return ResolveURLUsingLocalRef(aFrame, effects->mFilters[aIndex].GetURL());
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetFilterURI(nsIFrame* aFrame, const nsStyleFilter& aFilter)
+{
+  MOZ_ASSERT(aFrame->StyleEffects()->mFilters.Length());
+  MOZ_ASSERT(aFilter.GetType() == NS_STYLE_FILTER_URL);
+
+  return ResolveURLUsingLocalRef(aFrame, aFilter.GetURL());
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetPaintURI(nsIFrame* aFrame,
+                          nsStyleSVGPaint nsStyleSVG::* aPaint)
+{
+  const nsStyleSVG* svgStyle = aFrame->StyleSVG();
+  MOZ_ASSERT((svgStyle->*aPaint).Type() ==
+             nsStyleSVGPaintType::eStyleSVGPaintType_Server);
+
+  return ResolveURLUsingLocalRef(aFrame,
+                                 (svgStyle->*aPaint).GetPaintServer());
+}
+
+already_AddRefed<nsIURI>
+nsSVGEffects::GetMaskURI(nsIFrame* aFrame, uint32_t aIndex)
+{
+  const nsStyleSVGReset* svgReset = aFrame->StyleSVGReset();
+  MOZ_ASSERT(svgReset->mMask.mLayers.Length() > aIndex);
+
+  return ResolveURLUsingLocalRef(aFrame,
+                                 svgReset->mMask.mLayers[aIndex].mSourceURI);
+}