mirror of
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99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "mozilla/ComputedStyle.h"
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#include "SVGObserverUtils.h"
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using namespace mozilla;
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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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friend nsIFrame* NS_NewSVGStopFrame(nsIPresShell* aPresShell,
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ComputedStyle* aStyle);
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protected:
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explicit nsSVGStopFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: nsFrame(aStyle, aPresContext, kClassID) {
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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(nsSVGStopFrame)
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// nsIFrame interface:
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent, 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, nsAtom* aAttribute,
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int32_t aModType) override;
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virtual bool IsFrameOfType(uint32_t aFlags) const override {
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if (aFlags & eSupportsContainLayoutAndPaint) {
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return false;
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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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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 nsSVGStopFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) {
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NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::stop),
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"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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nsresult nsSVGStopFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) {
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if (aNameSpaceID == kNameSpaceID_None && aAttribute == nsGkAtoms::offset) {
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MOZ_ASSERT(
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GetParent()->IsSVGLinearGradientFrame() ||
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GetParent()->IsSVGRadialGradientFrame(),
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"Observers observe the gradient, so that's what we must invalidate");
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SVGObserverUtils::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, ComputedStyle* aStyle) {
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return new (aPresShell) nsSVGStopFrame(aStyle, aPresShell->GetPresContext());
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}
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