1 files changed, 107 insertions, 0 deletions
diff --git a/layout/svg/SVGFELeafFrame.cpp b/layout/svg/SVGFELeafFrame.cpp
new file mode 100644
index 0000000000..d2a5fd891e
--- /dev/null
+++ b/layout/svg/SVGFELeafFrame.cpp
@@ -0,0 +1,107 @@
+/* -*- 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/. */
+
+// Keep in (case-insensitive) order:
+#include "nsContainerFrame.h"
+#include "nsFrame.h"
+#include "nsGkAtoms.h"
+#include "nsSVGEffects.h"
+#include "nsSVGFilters.h"
+
+/*
+ * This frame is used by filter primitive elements that don't
+ * have special child elements that provide parameters.
+ */
+class SVGFELeafFrame : public nsFrame
+{
+  friend nsIFrame*
+  NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+protected:
+  explicit SVGFELeafFrame(nsStyleContext* aContext)
+    : nsFrame(aContext)
+  {
+    AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
+  }
+
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+#ifdef DEBUG
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+#endif
+
+  virtual bool IsFrameOfType(uint32_t aFlags) const override
+  {
+    return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
+  }
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override
+  {
+    return MakeFrameName(NS_LITERAL_STRING("SVGFELeaf"), aResult);
+  }
+#endif
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::svgFELeafFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+  virtual nsresult AttributeChanged(int32_t  aNameSpaceID,
+                                    nsIAtom* aAttribute,
+                                    int32_t  aModType) override;
+
+  virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override {
+    // We don't maintain a visual overflow rect
+    return false;
+  }
+};
+
+nsIFrame*
+NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) SVGFELeafFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGFELeafFrame)
+
+#ifdef DEBUG
+void
+SVGFELeafFrame::Init(nsIContent*       aContent,
+                     nsContainerFrame* aParent,
+                     nsIFrame*         aPrevInFlow)
+{
+  NS_ASSERTION(aContent->IsNodeOfType(nsINode::eFILTER),
+               "Trying to construct an SVGFELeafFrame for a "
+               "content element that doesn't support the right interfaces");
+
+  nsFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsIAtom *
+SVGFELeafFrame::GetType() const
+{
+  return nsGkAtoms::svgFELeafFrame;
+}
+
+nsresult
+SVGFELeafFrame::AttributeChanged(int32_t  aNameSpaceID,
+                                 nsIAtom* aAttribute,
+                                 int32_t  aModType)
+{
+  nsSVGFE *element = static_cast<nsSVGFE*>(mContent);
+  if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
+    MOZ_ASSERT(GetParent()->GetType() == nsGkAtoms::svgFilterFrame,
+               "Observers observe the filter, so that's what we must invalidate");
+    nsSVGEffects::InvalidateDirectRenderingObservers(GetParent());
+  }
+
+  return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}