gecko-dev/layout/svg/nsSVGAFrame.cpp

106 строки
3.5 KiB
C++

/* -*- 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 "nsIDOMMutationEvent.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, kClassID)
{}
public:
NS_DECL_FRAMEARENA_HELPERS(nsSVGAFrame)
#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;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGA"), aResult);
}
#endif
};
//----------------------------------------------------------------------
// 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);
}
// 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 == nsIDOMMutationEvent::SMIL &&
aAttribute == nsGkAtoms::href &&
(aNameSpaceID == kNameSpaceID_None ||
aNameSpaceID == kNameSpaceID_XLink)) {
dom::SVGAElement* 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;
}