import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/svg/nsSVGAFrame.cpp

@@ -0,0 +1,147 @@
+/* -*- 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 "gfxMatrix.h"
+#include "mozilla/dom/SVGAElement.h"
+#include "nsAutoPtr.h"
+#include "nsSVGContainerFrame.h"
+#include "nsSVGIntegrationUtils.h"
+#include "nsSVGUtils.h"
+#include "SVGLengthList.h"
+
+using namespace mozilla;
+
+class nsSVGAFrame : public nsSVGDisplayContainerFrame
+{
+  friend nsIFrame*
+  NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
+protected:
+  explicit nsSVGAFrame(nsStyleContext* aContext)
+    : nsSVGDisplayContainerFrame(aContext) {}
+
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+#ifdef DEBUG
+  virtual void Init(nsIContent*       aContent,
+                    nsContainerFrame* aParent,
+                    nsIFrame*         aPrevInFlow) override;
+#endif
+
+  // nsIFrame:
+  virtual nsresult  AttributeChanged(int32_t         aNameSpaceID,
+                                     nsIAtom*        aAttribute,
+                                     int32_t         aModType) override;
+
+  /**
+   * Get the "type" of the frame
+   *
+   * @see nsGkAtoms::svgAFrame
+   */
+  virtual nsIAtom* GetType() const override;
+
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override
+  {
+    return MakeFrameName(NS_LITERAL_STRING("SVGA"), aResult);
+  }
+#endif
+  // nsISVGChildFrame interface:
+  virtual void NotifySVGChanged(uint32_t aFlags) override;
+  
+  // nsSVGContainerFrame methods:
+  virtual gfxMatrix GetCanvasTM() override;
+
+private:
+  nsAutoPtr<gfxMatrix> mCanvasTM;
+};
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsIFrame*
+NS_NewSVGAFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+  return new (aPresShell) nsSVGAFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsSVGAFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods
+#ifdef DEBUG
+void
+nsSVGAFrame::Init(nsIContent*       aContent,
+                  nsContainerFrame* aParent,
+                  nsIFrame*         aPrevInFlow)
+{
+  NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::a),
+               "Trying to construct an SVGAFrame for a "
+               "content element that doesn't support the right interfaces");
+
+  nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsresult
+nsSVGAFrame::AttributeChanged(int32_t         aNameSpaceID,
+                              nsIAtom*        aAttribute,
+                              int32_t         aModType)
+{
+  if (aNameSpaceID == kNameSpaceID_None &&
+      aAttribute == nsGkAtoms::transform) {
+    // We don't invalidate for transform changes (the layers code does that).
+    // Also note that SVGTransformableElement::GetAttributeChangeHint will
+    // return nsChangeHint_UpdateOverflow for "transform" attribute changes
+    // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
+    NotifySVGChanged(TRANSFORM_CHANGED);
+  }
+
+ return NS_OK;
+}
+
+nsIAtom *
+nsSVGAFrame::GetType() const
+{
+  return nsGkAtoms::svgAFrame;
+}
+
+//----------------------------------------------------------------------
+// nsISVGChildFrame methods
+
+void
+nsSVGAFrame::NotifySVGChanged(uint32_t aFlags)
+{
+  MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
+             "Invalidation logic may need adjusting");
+
+  if (aFlags & TRANSFORM_CHANGED) {
+    // make sure our cached transform matrix gets (lazily) updated
+    mCanvasTM = nullptr;
+  }
+
+  nsSVGDisplayContainerFrame::NotifySVGChanged(aFlags);
+}
+
+//----------------------------------------------------------------------
+// nsSVGContainerFrame methods:
+
+gfxMatrix
+nsSVGAFrame::GetCanvasTM()
+{
+  if (!mCanvasTM) {
+    NS_ASSERTION(GetParent(), "null parent");
+
+    nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
+    dom::SVGAElement *content = static_cast<dom::SVGAElement*>(mContent);
+
+    gfxMatrix tm = content->PrependLocalTransformsTo(parent->GetCanvasTM());
+
+    mCanvasTM = new gfxMatrix(tm);
+  }
+
+  return *mCanvasTM;
+}