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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 "nsContainerFrame.h"
#include "nsFrame.h"
#include "nsGkAtoms.h"
#include "nsStyleContext.h"
#include "nsSVGEffects.h"
// This is a very simple frame whose only purpose is to capture style change
// events and propagate them to the parent. Most of the heavy lifting is done
// within the nsSVGGradientFrame, which is the parent for this frame
class nsSVGStopFrame : public nsFrame
{
friend nsIFrame*
NS_NewSVGStopFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
protected:
explicit nsSVGStopFrame(nsStyleContext* aContext)
: nsFrame(aContext)
{
AddStateBits(NS_FRAME_IS_NONDISPLAY);
}
public:
NS_DECL_FRAMEARENA_HELPERS
// nsIFrame interface:
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) override {}
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType) override;
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::svgStopFrame
*/
virtual nsIAtom* GetType() const override;
virtual bool IsFrameOfType(uint32_t aFlags) const override
{
return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
}
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGStop"), aResult);
}
#endif
};
//----------------------------------------------------------------------
// Implementation
NS_IMPL_FRAMEARENA_HELPERS(nsSVGStopFrame)
//----------------------------------------------------------------------
// nsIFrame methods:
#ifdef DEBUG
void
nsSVGStopFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop), "Content is not a stop element");
nsFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
nsIAtom *
nsSVGStopFrame::GetType() const
{
return nsGkAtoms::svgStopFrame;
}
nsresult
nsSVGStopFrame::AttributeChanged(int32_t aNameSpaceID,
nsIAtom* aAttribute,
int32_t aModType)
{
if (aNameSpaceID == kNameSpaceID_None &&
aAttribute == nsGkAtoms::offset) {
MOZ_ASSERT(GetParent()->GetType() == nsGkAtoms::svgLinearGradientFrame ||
GetParent()->GetType() == nsGkAtoms::svgRadialGradientFrame,
"Observers observe the gradient, so that's what we must invalidate");
nsSVGEffects::InvalidateDirectRenderingObservers(GetParent());
}
return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
// -------------------------------------------------------------------------
// Public functions
// -------------------------------------------------------------------------
nsIFrame* NS_NewSVGStopFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext)
{
return new (aPresShell) nsSVGStopFrame(aContext);
}
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