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/* -*- 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;
}
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