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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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
// Keep in (case-insensitive) order:
#include "nsContainerFrame.h"
#include "nsIFrame.h"
#include "nsGkAtoms.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGGradientFrame.h"
#include "mozilla/SVGObserverUtils.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 SVGGradientFrame, which is the parent for this frame
nsIFrame* NS_NewSVGStopFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGStopFrame : public nsIFrame {
friend nsIFrame* ::NS_NewSVGStopFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
protected:
explicit SVGStopFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsIFrame(aStyle, aPresContext, kClassID) {
AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
}
public:
NS_DECL_FRAMEARENA_HELPERS(SVGStopFrame)
// nsIFrame interface:
#ifdef DEBUG
void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override {}
nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG_FRAME_DUMP
nsresult GetFrameName(nsAString& aResult) const override {
return MakeFrameName(u"SVGStop"_ns, aResult);
}
#endif
};
//----------------------------------------------------------------------
// Implementation
NS_IMPL_FRAMEARENA_HELPERS(SVGStopFrame)
//----------------------------------------------------------------------
// nsIFrame methods:
#ifdef DEBUG
void SVGStopFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop),
"Content is not a stop element");
nsIFrame::Init(aContent, aParent, aPrevInFlow);
}
#endif /* DEBUG */
nsresult SVGStopFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::offset) {
MOZ_ASSERT(
static_cast<SVGGradientFrame*>(do_QueryFrame(GetParent())),
"Observers observe the gradient, so that's what we must invalidate");
SVGObserverUtils::InvalidateRenderingObservers(GetParent());
}
return nsIFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
} // namespace mozilla
// -------------------------------------------------------------------------
// Public functions
// -------------------------------------------------------------------------
nsIFrame* NS_NewSVGStopFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGStopFrame(aStyle, aPresShell->GetPresContext());
}