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b099eab802
All classes deriving from nsIFrame that did not have any subclasses themselves (at the time of writing this patch) have been marked with `final`. Some other Layout classes have also been made final, but this was opportunistic while working on nsIFrame subclasses, and is definitely not exhaustive, further patches welcome; refer to bug 1332680. Advantages of marking a class final include: - Allowing the compiler to devirtualize some method calls (i.e., calling virtual functions directly instead of going through the vtable), - Indicating that the class is not currently subclassed, - Preventing subclassing without being aware that this would remove the finalization benefits of the parent class. `final` does not signify that these classes should *never* be subclassed, this is left for developers to decide. Differential Revision: https://phabricator.services.mozilla.com/D5020 --HG-- extra : moz-landing-system : lando
108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Keep in (case-insensitive) order:
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#include "gfxMatrix.h"
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#include "mozilla/dom/SVGAElement.h"
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#include "mozilla/dom/MutationEventBinding.h"
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#include "nsAutoPtr.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGUtils.h"
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#include "SVGLengthList.h"
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using namespace mozilla;
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class nsSVGAFrame final : public nsSVGDisplayContainerFrame
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{
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friend nsIFrame*
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NS_NewSVGAFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle);
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protected:
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explicit nsSVGAFrame(ComputedStyle* aStyle)
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: nsSVGDisplayContainerFrame(aStyle, kClassID)
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{}
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsSVGAFrame)
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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// nsIFrame:
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) override;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGA"), aResult);
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}
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#endif
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};
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGAFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle)
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{
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return new (aPresShell) nsSVGAFrame(aStyle);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGAFrame)
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//----------------------------------------------------------------------
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// nsIFrame methods
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#ifdef DEBUG
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void
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nsSVGAFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::a),
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"Trying to construct an SVGAFrame for a "
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"content element that doesn't support the right interfaces");
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nsSVGDisplayContainerFrame::Init(aContent, aParent, aPrevInFlow);
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}
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#endif /* DEBUG */
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nsresult
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nsSVGAFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None &&
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aAttribute == nsGkAtoms::transform) {
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// We don't invalidate for transform changes (the layers code does that).
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// Also note that SVGTransformableElement::GetAttributeChangeHint will
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// return nsChangeHint_UpdateOverflow for "transform" attribute changes
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// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
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NotifySVGChanged(TRANSFORM_CHANGED);
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}
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// Currently our SMIL implementation does not modify the DOM attributes. Once
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// we implement the SVG 2 SMIL behaviour this can be removed
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// SVGAElement::SetAttr/UnsetAttr's ResetLinkState() call will be sufficient.
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if (aModType == dom::MutationEvent_Binding::SMIL &&
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aAttribute == nsGkAtoms::href &&
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(aNameSpaceID == kNameSpaceID_None ||
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aNameSpaceID == kNameSpaceID_XLink)) {
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dom::SVGAElement* content = static_cast<dom::SVGAElement*>(GetContent());
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// SMIL may change whether an <a> element is a link, in which case we will
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// need to update the link state.
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content->ResetLinkState(true, content->ElementHasHref());
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}
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return NS_OK;
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}
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