1 files changed, 168 insertions, 0 deletions
diff --git a/layout/svg/SVGFEImageFrame.cpp b/layout/svg/SVGFEImageFrame.cpp
new file mode 100644
index 000000000..185096a93
--- /dev/null
+++ b/layout/svg/SVGFEImageFrame.cpp
@@ -0,0 +1,168 @@
+/* -*- 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 "nsContentUtils.h"
+#include "nsFrame.h"
+#include "nsGkAtoms.h"
+#include "nsLiteralString.h"
+#include "nsSVGEffects.h"
+#include "nsSVGFilters.h"
+#include "mozilla/dom/SVGFEImageElement.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+class SVGFEImageFrame : public nsFrame
+{
+  friend nsIFrame*
+  NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+protected:
+  explicit SVGFEImageFrame(nsStyleContext* aContext)
+    : nsFrame(aContext)
+  {
+    AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
+
+    // This frame isn't actually displayed, but it contains an image and we want
+    // to use the nsImageLoadingContent machinery for managing images, which
+    // requires visibility tracking, so we enable visibility tracking and
+    // forcibly mark it visible below.
+    EnableVisibilityTracking();
+  }
+
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+  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("SVGFEImage"), aResult);
+  }
+#endif
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::svgFEImageFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+  virtual nsresult AttributeChanged(int32_t  aNameSpaceID,
+                                    nsIAtom* aAttribute,
+                                    int32_t  aModType) override;
+
+  void OnVisibilityChange(Visibility aNewVisibility,
+                          Maybe<OnNonvisible> aNonvisibleAction = Nothing()) override;
+
+  virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override {
+    // We don't maintain a visual overflow rect
+    return false;
+  }
+};
+
+nsIFrame*
+NS_NewSVGFEImageFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) SVGFEImageFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGFEImageFrame)
+
+/* virtual */ void
+SVGFEImageFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  DecApproximateVisibleCount();
+
+  nsCOMPtr<nsIImageLoadingContent> imageLoader =
+    do_QueryInterface(nsFrame::mContent);
+  if (imageLoader) {
+    imageLoader->FrameDestroyed(this);
+  }
+
+  nsFrame::DestroyFrom(aDestructRoot);
+}
+
+void
+SVGFEImageFrame::Init(nsIContent*       aContent,
+                      nsContainerFrame* aParent,
+                      nsIFrame*         aPrevInFlow)
+{
+  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::feImage),
+               "Trying to construct an SVGFEImageFrame for a "
+               "content element that doesn't support the right interfaces");
+
+  nsFrame::Init(aContent, aParent, aPrevInFlow);
+
+  // We assume that feImage's are always visible.
+  IncApproximateVisibleCount();
+
+  nsCOMPtr<nsIImageLoadingContent> imageLoader =
+    do_QueryInterface(nsFrame::mContent);
+  if (imageLoader) {
+    imageLoader->FrameCreated(this);
+  }
+}
+
+nsIAtom *
+SVGFEImageFrame::GetType() const
+{
+  return nsGkAtoms::svgFEImageFrame;
+}
+
+nsresult
+SVGFEImageFrame::AttributeChanged(int32_t  aNameSpaceID,
+                                  nsIAtom* aAttribute,
+                                  int32_t  aModType)
+{
+  SVGFEImageElement *element = static_cast<SVGFEImageElement*>(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());
+  }
+  if ((aNameSpaceID == kNameSpaceID_XLink ||
+       aNameSpaceID == kNameSpaceID_None) &&
+      aAttribute == nsGkAtoms::href) {
+    bool hrefIsSet =
+      element->mStringAttributes[SVGFEImageElement::HREF].IsExplicitlySet() ||
+      element->mStringAttributes[SVGFEImageElement::XLINK_HREF]
+        .IsExplicitlySet();
+    if (hrefIsSet) {
+      element->LoadSVGImage(true, true);
+    } else {
+      element->CancelImageRequests(true);
+    }
+  }
+
+  return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+void
+SVGFEImageFrame::OnVisibilityChange(Visibility aNewVisibility,
+                                    Maybe<OnNonvisible> aNonvisibleAction)
+{
+  nsCOMPtr<nsIImageLoadingContent> imageLoader =
+    do_QueryInterface(nsFrame::mContent);
+  if (!imageLoader) {
+    MOZ_ASSERT_UNREACHABLE("Should have an nsIImageLoadingContent");
+    nsFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+    return;
+  }
+
+  imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+
+  nsFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
+}