зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
3.2 KiB
C++
104 строки
3.2 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 "nsGkAtoms.h"
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#include "nsIFrame.h"
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#include "nsLiteralString.h"
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#include "SVGObserverUtils.h"
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#include "nsSVGFilters.h"
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using namespace mozilla;
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/*
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* This frame is used by filter primitive elements that
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* have special child elements that provide parameters.
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*/
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class SVGFEContainerFrame : public nsContainerFrame
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{
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friend nsIFrame*
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NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle);
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protected:
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explicit SVGFEContainerFrame(ComputedStyle* aStyle)
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: nsContainerFrame(aStyle, kClassID)
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{
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AddStateBits(NS_FRAME_SVG_LAYOUT | NS_FRAME_IS_NONDISPLAY);
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}
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public:
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NS_DECL_FRAMEARENA_HELPERS(SVGFEContainerFrame)
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virtual bool IsFrameOfType(uint32_t aFlags) const override
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{
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if (aFlags & eSupportsContainLayoutAndPaint) {
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return false;
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}
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return nsContainerFrame::IsFrameOfType(
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aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
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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("SVGFEContainer"), aResult);
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}
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#endif
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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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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) override;
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virtual bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override {
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// We don't maintain a visual overflow rect
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return false;
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}
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};
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nsIFrame*
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NS_NewSVGFEContainerFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle)
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{
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return new (aPresShell) SVGFEContainerFrame(aStyle);
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}
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NS_IMPL_FRAMEARENA_HELPERS(SVGFEContainerFrame)
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#ifdef DEBUG
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void
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SVGFEContainerFrame::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->IsNodeOfType(nsINode::eFILTER),
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"Trying to construct an SVGFEContainerFrame for a "
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"content element that doesn't support the right interfaces");
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nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
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}
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#endif /* DEBUG */
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nsresult
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SVGFEContainerFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType)
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{
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nsSVGFE *element = static_cast<nsSVGFE*>(GetContent());
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if (element->AttributeAffectsRendering(aNameSpaceID, aAttribute)) {
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MOZ_ASSERT(GetParent()->IsSVGFilterFrame(),
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"Observers observe the filter, so that's what we must invalidate");
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SVGObserverUtils::InvalidateDirectRenderingObservers(GetParent());
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}
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return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
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}
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