mirror of
https://github.com/classilla/tenfourfox.git
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262 lines
8.2 KiB
C++
262 lines
8.2 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 "nsIAnonymousContentCreator.h"
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#include "nsSVGEffects.h"
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#include "nsSVGGFrame.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "nsContentList.h"
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typedef nsSVGGFrame nsSVGUseFrameBase;
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using namespace mozilla::dom;
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class nsSVGUseFrame : public nsSVGUseFrameBase,
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public nsIAnonymousContentCreator
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{
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friend nsIFrame*
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NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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protected:
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explicit nsSVGUseFrame(nsStyleContext* aContext) :
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nsSVGUseFrameBase(aContext),
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mHasValidDimensions(true)
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{}
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// nsIFrame interface:
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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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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType) override;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) 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::svgUseFrame
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*/
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virtual nsIAtom* GetType() const override;
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virtual bool IsLeaf() const override;
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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("SVGUse"), aResult);
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}
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#endif
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// nsISVGChildFrame interface:
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virtual void ReflowSVG() override;
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virtual void NotifySVGChanged(uint32_t aFlags) override;
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// nsIAnonymousContentCreator
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virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;
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virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter) override;
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private:
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bool mHasValidDimensions;
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};
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGUseFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGUseFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGUseFrame)
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nsIAtom *
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nsSVGUseFrame::GetType() const
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{
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return nsGkAtoms::svgUseFrame;
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}
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//----------------------------------------------------------------------
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// nsQueryFrame methods
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NS_QUERYFRAME_HEAD(nsSVGUseFrame)
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NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
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NS_QUERYFRAME_TAIL_INHERITING(nsSVGUseFrameBase)
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//----------------------------------------------------------------------
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// nsIFrame methods:
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void
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nsSVGUseFrame::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::use),
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"Content is not an SVG use!");
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mHasValidDimensions =
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static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
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nsSVGUseFrameBase::Init(aContent, aParent, aPrevInFlow);
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}
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nsresult
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nsSVGUseFrame::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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SVGUseElement *useElement = static_cast<SVGUseElement*>(mContent);
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if (aNameSpaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::x ||
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aAttribute == nsGkAtoms::y) {
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// make sure our cached transform matrix gets (lazily) updated
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mCanvasTM = nullptr;
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nsLayoutUtils::PostRestyleEvent(
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useElement, nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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nsSVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
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} else if (aAttribute == nsGkAtoms::width ||
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aAttribute == nsGkAtoms::height) {
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bool invalidate = false;
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if (mHasValidDimensions != useElement->HasValidDimensions()) {
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mHasValidDimensions = !mHasValidDimensions;
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invalidate = true;
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}
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if (useElement->OurWidthAndHeightAreUsed()) {
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invalidate = true;
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useElement->SyncWidthOrHeight(aAttribute);
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}
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if (invalidate) {
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nsLayoutUtils::PostRestyleEvent(
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useElement, nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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}
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} else if (aNameSpaceID == kNameSpaceID_XLink &&
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aAttribute == nsGkAtoms::href) {
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// we're changing our nature, clear out the clone information
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nsLayoutUtils::PostRestyleEvent(
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useElement, nsRestyleHint(0),
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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useElement->mOriginal = nullptr;
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useElement->UnlinkSource();
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useElement->TriggerReclone();
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}
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return nsSVGUseFrameBase::AttributeChanged(aNameSpaceID,
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aAttribute, aModType);
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}
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void
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nsSVGUseFrame::DestroyFrom(nsIFrame* aDestructRoot)
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{
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RefPtr<SVGUseElement> use = static_cast<SVGUseElement*>(mContent);
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nsSVGUseFrameBase::DestroyFrom(aDestructRoot);
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use->DestroyAnonymousContent();
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}
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bool
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nsSVGUseFrame::IsLeaf() const
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{
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return true;
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}
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//----------------------------------------------------------------------
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// nsISVGChildFrame methods
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void
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nsSVGUseFrame::ReflowSVG()
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{
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// We only handle x/y offset here, since any width/height that is in force is
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// handled by the nsSVGOuterSVGFrame for the anonymous <svg> that will be
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// created for that purpose.
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float x, y;
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static_cast<SVGUseElement*>(mContent)->
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GetAnimatedLengthValues(&x, &y, nullptr);
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mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(
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gfxRect(x, y, 0.0, 0.0),
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PresContext()->AppUnitsPerCSSPixel()).TopLeft());
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// If we have a filter, we need to invalidate ourselves because filter
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// output can change even if none of our descendants need repainting.
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if (StyleSVGReset()->HasFilters()) {
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InvalidateFrame();
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}
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nsSVGUseFrameBase::ReflowSVG();
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}
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void
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nsSVGUseFrame::NotifySVGChanged(uint32_t aFlags)
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{
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if (aFlags & COORD_CONTEXT_CHANGED &&
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!(aFlags & TRANSFORM_CHANGED)) {
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// Coordinate context changes affect mCanvasTM if we have a
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// percentage 'x' or 'y'
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SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
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if (use->mLengthAttributes[SVGUseElement::ATTR_X].IsPercentage() ||
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use->mLengthAttributes[SVGUseElement::ATTR_Y].IsPercentage()) {
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aFlags |= TRANSFORM_CHANGED;
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// Ancestor changes can't affect how we render from the perspective of
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// any rendering observers that we may have, so we don't need to
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// invalidate them. We also don't need to invalidate ourself, since our
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// changed ancestor will have invalidated its entire area, which includes
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// our area.
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// For perf reasons we call this before calling NotifySVGChanged() below.
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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}
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// We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
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// non-percentage width/height, since if they're set then they are cloned to
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// an anonymous child <svg>, and its nsSVGInnerSVGFrame will do that.
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nsSVGUseFrameBase::NotifySVGChanged(aFlags);
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}
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//----------------------------------------------------------------------
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// nsIAnonymousContentCreator methods:
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nsresult
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nsSVGUseFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
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{
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SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
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nsIContent* clone = use->CreateAnonymousContent();
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nsLayoutUtils::PostRestyleEvent(
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use, nsRestyleHint(0), nsChangeHint_InvalidateRenderingObservers);
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if (!clone)
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return NS_ERROR_FAILURE;
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if (!aElements.AppendElement(clone))
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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void
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nsSVGUseFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
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uint32_t aFilter)
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{
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SVGUseElement *use = static_cast<SVGUseElement*>(mContent);
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nsIContent* clone = use->GetAnonymousContent();
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if (clone) {
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aElements.AppendElement(clone);
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}
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}
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