Add m-esr52 at 52.6.0

1 files changed, 259 insertions, 0 deletions

diff --git a/layout/svg/nsSVGUseFrame.cpp b/layout/svg/nsSVGUseFrame.cpp
new file mode 100644
index 000000000..118d24f69
--- /dev/null
+++ b/layout/svg/nsSVGUseFrame.cpp
@@ -0,0 +1,259 @@
+/* -*- 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 "nsIAnonymousContentCreator.h"
+#include "nsSVGEffects.h"
+#include "nsSVGGFrame.h"
+#include "mozilla/dom/SVGUseElement.h"
+#include "nsContentList.h"
+
+using namespace mozilla::dom;
+
+class nsSVGUseFrame : public nsSVGGFrame
+                    , public nsIAnonymousContentCreator
+{
+  friend nsIFrame*
+  NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+
+protected:
+  explicit nsSVGUseFrame(nsStyleContext* aContext)
+    : nsSVGGFrame(aContext)
+    , mHasValidDimensions(true)
+  {}
+
+public:
+  NS_DECL_QUERYFRAME
+  NS_DECL_FRAMEARENA_HELPERS
+
+  // nsIFrame interface:
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+
+  virtual nsresult  AttributeChanged(int32_t         aNameSpaceID,
+                                     nsIAtom*        aAttribute,
+                                     int32_t         aModType) override;
+
+  virtual void DestroyFrom(nsIFrame* aDestructRoot) override;
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::svgUseFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+  virtual bool IsLeaf() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override
+  {
+    return MakeFrameName(NS_LITERAL_STRING("SVGUse"), aResult);
+  }
+#endif
+
+  // nsISVGChildFrame interface:
+  virtual void ReflowSVG() override;
+  virtual void NotifySVGChanged(uint32_t aFlags) override;
+
+  // nsIAnonymousContentCreator
+  virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
+  virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                        uint32_t aFilter) override;
+
+private:
+  bool mHasValidDimensions;
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsIFrame*
+NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) nsSVGUseFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGUseFrame)
+
+nsIAtom *
+nsSVGUseFrame::GetType() const
+{
+  return nsGkAtoms::svgUseFrame;
+}
+
+//----------------------------------------------------------------------
+// nsQueryFrame methods
+
+NS_QUERYFRAME_HEAD(nsSVGUseFrame)
+  NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsSVGGFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods:
+
+void
+nsSVGUseFrame::Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow)
+{
+  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::use),
+               "Content is not an SVG use!");
+
+  mHasValidDimensions =
+    static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
+
+  nsSVGGFrame::Init(aContent, aParent, aPrevInFlow);
+}
+
+nsresult
+nsSVGUseFrame::AttributeChanged(int32_t         aNameSpaceID,
+                                nsIAtom*        aAttribute,
+                                int32_t         aModType)
+{
+  SVGUseElement *useElement = static_cast<SVGUseElement*>(mContent);
+
+  if (aNameSpaceID == kNameSpaceID_None) {
+    if (aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y) {
+      // make sure our cached transform matrix gets (lazily) updated
+      mCanvasTM = nullptr;
+      nsLayoutUtils::PostRestyleEvent(
+        useElement, nsRestyleHint(0),
+        nsChangeHint_InvalidateRenderingObservers);
+      nsSVGUtils::ScheduleReflowSVG(this);
+      nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
+    } else if (aAttribute == nsGkAtoms::width ||
+               aAttribute == nsGkAtoms::height) {
+      bool invalidate = false;
+      if (mHasValidDimensions != useElement->HasValidDimensions()) {
+        mHasValidDimensions = !mHasValidDimensions;
+        invalidate = true;
+      }
+      if (useElement->OurWidthAndHeightAreUsed()) {
+        invalidate = true;
+        useElement->SyncWidthOrHeight(aAttribute);
+      }
+      if (invalidate) {
+        nsLayoutUtils::PostRestyleEvent(
+          useElement, nsRestyleHint(0),
+          nsChangeHint_InvalidateRenderingObservers);
+        nsSVGUtils::ScheduleReflowSVG(this);
+      }
+    }
+  }
+
+  if ((aNameSpaceID == kNameSpaceID_XLink ||
+       aNameSpaceID == kNameSpaceID_None) &&
+      aAttribute == nsGkAtoms::href) {
+    // we're changing our nature, clear out the clone information
+    nsLayoutUtils::PostRestyleEvent(
+      useElement, nsRestyleHint(0),
+      nsChangeHint_InvalidateRenderingObservers);
+    nsSVGUtils::ScheduleReflowSVG(this);
+    useElement->mOriginal = nullptr;
+    useElement->UnlinkSource();
+    useElement->TriggerReclone();
+  }
+
+  return nsSVGGFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+void
+nsSVGUseFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+  RefPtr<SVGUseElement> use = static_cast<SVGUseElement*>(mContent);
+  nsSVGGFrame::DestroyFrom(aDestructRoot);
+  use->DestroyAnonymousContent();
+}
+
+bool
+nsSVGUseFrame::IsLeaf() const
+{
+  return true;
+}
+
+
+//----------------------------------------------------------------------
+// nsISVGChildFrame methods
+
+void
+nsSVGUseFrame::ReflowSVG()
+{
+  // We only handle x/y offset here, since any width/height that is in force is
+  // handled by the nsSVGOuterSVGFrame for the anonymous <svg> that will be
+  // created for that purpose.
+  float x, y;
+  static_cast<SVGUseElement*>(mContent)->
+    GetAnimatedLengthValues(&x, &y, nullptr);
+  mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(
+                 gfxRect(x, y, 0.0, 0.0),
+                 PresContext()->AppUnitsPerCSSPixel()).TopLeft());
+
+  // If we have a filter, we need to invalidate ourselves because filter
+  // output can change even if none of our descendants need repainting.
+  if (StyleEffects()->HasFilters()) {
+    InvalidateFrame();
+  }
+
+  nsSVGGFrame::ReflowSVG();
+}
+
+void
+nsSVGUseFrame::NotifySVGChanged(uint32_t aFlags)
+{
+  if (aFlags & COORD_CONTEXT_CHANGED &&
+      !(aFlags & TRANSFORM_CHANGED)) {
+    // Coordinate context changes affect mCanvasTM if we have a
+    // percentage 'x' or 'y'
+    SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
+    if (use->mLengthAttributes[SVGUseElement::ATTR_X].IsPercentage() ||
+        use->mLengthAttributes[SVGUseElement::ATTR_Y].IsPercentage()) {
+      aFlags |= TRANSFORM_CHANGED;
+      // Ancestor changes can't affect how we render from the perspective of
+      // any rendering observers that we may have, so we don't need to
+      // invalidate them. We also don't need to invalidate ourself, since our
+      // changed ancestor will have invalidated its entire area, which includes
+      // our area.
+      // For perf reasons we call this before calling NotifySVGChanged() below.
+      nsSVGUtils::ScheduleReflowSVG(this);
+    }
+  }
+
+  // We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
+  // non-percentage width/height, since if they're set then they are cloned to
+  // an anonymous child <svg>, and its nsSVGInnerSVGFrame will do that.
+
+  nsSVGGFrame::NotifySVGChanged(aFlags);
+}
+
+//----------------------------------------------------------------------
+// nsIAnonymousContentCreator methods:
+
+nsresult
+nsSVGUseFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
+{
+  SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
+
+  nsIContent* clone = use->CreateAnonymousContent();
+  nsLayoutUtils::PostRestyleEvent(
+    use, nsRestyleHint(0), nsChangeHint_InvalidateRenderingObservers);
+  if (!clone)
+    return NS_ERROR_FAILURE;
+  if (!aElements.AppendElement(clone))
+    return NS_ERROR_OUT_OF_MEMORY;
+  return NS_OK;
+}
+
+void
+nsSVGUseFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+                                        uint32_t aFilter)
+{
+  SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
+  nsIContent* clone = use->GetAnonymousContent();
+  if (clone) {
+    aElements.AppendElement(clone);
+  }
+}