1 files changed, 79 insertions, 0 deletions
diff --git a/layout/svg/SVGFEUnstyledLeafFrame.cpp b/layout/svg/SVGFEUnstyledLeafFrame.cpp
new file mode 100644
index 0000000000..63cb20bfd8
--- /dev/null
+++ b/layout/svg/SVGFEUnstyledLeafFrame.cpp
@@ -0,0 +1,79 @@
+/* -*- 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/. */
+
+// Keep in (case-insensitive) order:
+#include "mozilla/dom/SVGFilters.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/SVGObserverUtils.h"
+#include "nsContainerFrame.h"
+#include "nsIFrame.h"
+#include "nsGkAtoms.h"
+
+nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
+                                       mozilla::ComputedStyle* aStyle);
+
+namespace mozilla {
+
+class SVGFEUnstyledLeafFrame final : public nsIFrame {
+  friend nsIFrame* ::NS_NewSVGFEUnstyledLeafFrame(
+      mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
+
+ protected:
+  explicit SVGFEUnstyledLeafFrame(ComputedStyle* aStyle,
+                                  nsPresContext* aPresContext)
+      : nsIFrame(aStyle, aPresContext, kClassID) {
+    AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
+  }
+
+ public:
+  NS_DECL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
+
+  void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                        const nsDisplayListSet& aLists) override {}
+
+#ifdef DEBUG_FRAME_DUMP
+  nsresult GetFrameName(nsAString& aResult) const override {
+    return MakeFrameName(u"SVGFEUnstyledLeaf"_ns, aResult);
+  }
+#endif
+
+  nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+                            int32_t aModType) override;
+
+  bool ComputeCustomOverflow(OverflowAreas& aOverflowAreas) override {
+    // We don't maintain a ink overflow rect
+    return false;
+  }
+};
+
+}  // namespace mozilla
+
+nsIFrame* NS_NewSVGFEUnstyledLeafFrame(mozilla::PresShell* aPresShell,
+                                       mozilla::ComputedStyle* aStyle) {
+  return new (aPresShell)
+      mozilla::SVGFEUnstyledLeafFrame(aStyle, aPresShell->GetPresContext());
+}
+
+namespace mozilla {
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGFEUnstyledLeafFrame)
+
+nsresult SVGFEUnstyledLeafFrame::AttributeChanged(int32_t aNameSpaceID,
+                                                  nsAtom* aAttribute,
+                                                  int32_t aModType) {
+  auto* element =
+      static_cast<mozilla::dom::SVGFilterPrimitiveChildElement*>(GetContent());
+  if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
+    MOZ_ASSERT(
+        GetParent()->GetParent()->IsSVGFilterFrame(),
+        "Observers observe the filter, so that's what we must invalidate");
+    SVGObserverUtils::InvalidateRenderingObservers(GetParent()->GetParent());
+  }
+
+  return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+}  // namespace mozilla