gecko-dev/layout/svg/SVGFELeafFrame.cpp

108 lines
3.0 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 "nsFrame.h"
#include "nsGkAtoms.h"
#include "nsSVGEffects.h"
#include "nsSVGFilters.h"
typedef nsFrame SVGFELeafFrameBase;
/*
* This frame is used by filter primitive elements that don't
* have special child elements that provide parameters.
*/
class SVGFELeafFrame : public SVGFELeafFrameBase
{
friend nsIFrame*
NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
SVGFELeafFrame(nsStyleContext* aContext)
: SVGFELeafFrameBase(aContext)
{
AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
}
public:
NS_DECL_FRAMEARENA_HELPERS
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
#endif
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
{
return SVGFELeafFrameBase::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
}
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
{
return MakeFrameName(NS_LITERAL_STRING("SVGFELeaf"), aResult);
}
#endif
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgFELeafFrame
*/
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) MOZ_OVERRIDE;
virtual bool UpdateOverflow() MOZ_OVERRIDE {
// We don't maintain a visual overflow rect
return false;
}
};
nsIFrame*
NS_NewSVGFELeafFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) SVGFELeafFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(SVGFELeafFrame)
#ifdef DEBUG
void
SVGFELeafFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsNodeOfType(nsINode::eFILTER),
"Trying to construct an SVGFELeafFrame for a "
"content element that doesn't support the right interfaces");
SVGFELeafFrameBase::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
nsIAtom *
SVGFELeafFrame::GetType() const
{
return nsGkAtoms::svgFELeafFrame;
}
nsresult
SVGFELeafFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
nsSVGFE *element = static_cast<nsSVGFE*>(mContent);
if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
nsSVGEffects::InvalidateRenderingObservers(this);
}
return SVGFELeafFrameBase::AttributeChanged(aNameSpaceID,
aAttribute, aModType);
}