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-rw-r--r--layout/svg/SVGAFrame.cpp102
1 files changed, 102 insertions, 0 deletions
diff --git a/layout/svg/SVGAFrame.cpp b/layout/svg/SVGAFrame.cpp
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+++ b/layout/svg/SVGAFrame.cpp
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+/* -*- 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 "gfxMatrix.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/SVGContainerFrame.h"
+#include "mozilla/dom/SVGAElement.h"
+#include "mozilla/dom/MutationEventBinding.h"
+#include "SVGLengthList.h"
+
+nsIFrame* NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
+ mozilla::ComputedStyle* aStyle);
+
+namespace mozilla {
+
+class SVGAFrame final : public SVGDisplayContainerFrame {
+ friend nsIFrame* ::NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
+ ComputedStyle* aStyle);
+
+ protected:
+ explicit SVGAFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
+ : SVGDisplayContainerFrame(aStyle, aPresContext, kClassID) {}
+
+ public:
+ NS_DECL_FRAMEARENA_HELPERS(SVGAFrame)
+
+#ifdef DEBUG
+ virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow) override;
+#endif
+
+ // nsIFrame:
+ virtual nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
+ int32_t aModType) override;
+
+#ifdef DEBUG_FRAME_DUMP
+ nsresult GetFrameName(nsAString& aResult) const override {
+ return MakeFrameName(u"SVGA"_ns, aResult);
+ }
+#endif
+};
+
+} // namespace mozilla
+
+//----------------------------------------------------------------------
+// Implementation
+
+nsIFrame* NS_NewSVGAFrame(mozilla::PresShell* aPresShell,
+ mozilla::ComputedStyle* aStyle) {
+ return new (aPresShell)
+ mozilla::SVGAFrame(aStyle, aPresShell->GetPresContext());
+}
+
+namespace mozilla {
+
+NS_IMPL_FRAMEARENA_HELPERS(SVGAFrame)
+
+//----------------------------------------------------------------------
+// nsIFrame methods
+#ifdef DEBUG
+void SVGAFrame::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");
+
+ SVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+#endif /* DEBUG */
+
+nsresult SVGAFrame::AttributeChanged(int32_t aNameSpaceID, nsAtom* 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);
+ }
+
+ // Currently our SMIL implementation does not modify the DOM attributes. Once
+ // we implement the SVG 2 SMIL behaviour this can be removed
+ // SVGAElement::SetAttr/UnsetAttr's ResetLinkState() call will be sufficient.
+ if (aModType == dom::MutationEvent_Binding::SMIL &&
+ aAttribute == nsGkAtoms::href &&
+ (aNameSpaceID == kNameSpaceID_None ||
+ aNameSpaceID == kNameSpaceID_XLink)) {
+ auto* content = static_cast<dom::SVGAElement*>(GetContent());
+
+ // SMIL may change whether an <a> element is a link, in which case we will
+ // need to update the link state.
+ content->ResetLinkState(true, content->ElementHasHref());
+ }
+
+ return NS_OK;
+}
+
+} // namespace mozilla