116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Keep in (case-insensitive) order:
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#include "nsContainerFrame.h"
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#include "nsFrame.h"
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#include "nsGkAtoms.h"
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#include "nsStyleContext.h"
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#include "nsSVGEffects.h"
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// This is a very simple frame whose only purpose is to capture style change
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// events and propagate them to the parent. Most of the heavy lifting is done
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// within the nsSVGGradientFrame, which is the parent for this frame
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class nsSVGStopFrame : public nsFrame
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{
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friend nsIFrame*
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NS_NewSVGStopFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGStopFrame(nsStyleContext* aContext)
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: nsFrame(aContext)
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{
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AddStateBits(NS_FRAME_IS_NONDISPLAY);
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}
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public:
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame interface:
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override {}
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::svgStopFrame
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*/
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virtual nsIAtom* GetType() const override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eSVG));
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}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGStop"), aResult);
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}
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#endif
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};
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//----------------------------------------------------------------------
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// Implementation
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGStopFrame)
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//----------------------------------------------------------------------
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// nsIFrame methods:
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#ifdef DEBUG
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void
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nsSVGStopFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop), "Content is not a stop element");
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nsFrame::Init(aContent, aParent, aPrevInFlow);
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}
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#endif /* DEBUG */
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nsIAtom *
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nsSVGStopFrame::GetType() const
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{
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return nsGkAtoms::svgStopFrame;
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}
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nsresult
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nsSVGStopFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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if (aNameSpaceID == kNameSpaceID_None &&
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aAttribute == nsGkAtoms::offset) {
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MOZ_ASSERT(GetParent()->GetType() == nsGkAtoms::svgLinearGradientFrame ||
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GetParent()->GetType() == nsGkAtoms::svgRadialGradientFrame,
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"Observers observe the gradient, so that's what we must invalidate");
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nsSVGEffects::InvalidateDirectRenderingObservers(GetParent());
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}
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return nsFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
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}
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// -------------------------------------------------------------------------
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// Public functions
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// -------------------------------------------------------------------------
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nsIFrame* NS_NewSVGStopFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGStopFrame(aContext);
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}
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