зеркало из https://github.com/mozilla/gecko-dev.git
130 строки
5.0 KiB
C++
130 строки
5.0 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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#include "nsSVGUseFrame.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/dom/MutationEvent.h"
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#include "mozilla/dom/SVGUseElement.h"
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#include "SVGObserverUtils.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame* NS_NewSVGUseFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
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return new (aPresShell) nsSVGUseFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGUseFrame)
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//----------------------------------------------------------------------
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// nsIFrame methods:
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void nsSVGUseFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) {
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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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nsSVGGFrame::Init(aContent, aParent, aPrevInFlow);
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}
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nsresult nsSVGUseFrame::AttributeChanged(int32_t aNamespaceID,
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nsAtom* aAttribute, int32_t aModType) {
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// Currently our SMIL implementation does not modify the DOM attributes. Once
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// we implement the SVG 2 SMIL behaviour this can be removed
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// SVGUseElement::AfterSetAttr's implementation will be sufficient.
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if (aModType == MutationEvent_Binding::SMIL) {
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auto* content = SVGUseElement::FromNode(GetContent());
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content->ProcessAttributeChange(aNamespaceID, aAttribute);
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}
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return nsSVGGFrame::AttributeChanged(aNamespaceID, aAttribute, aModType);
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}
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void nsSVGUseFrame::PositionAttributeChanged() {
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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(GetContent()->AsElement(), RestyleHint{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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}
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void nsSVGUseFrame::DimensionAttributeChanged(bool aHadValidDimensions,
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bool aAttributeIsUsed) {
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bool invalidate = aAttributeIsUsed;
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if (mHasValidDimensions != aHadValidDimensions) {
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mHasValidDimensions = !mHasValidDimensions;
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invalidate = true;
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}
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if (invalidate) {
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nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{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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void nsSVGUseFrame::HrefChanged() {
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nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{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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// nsSVGDisplayableFrame methods
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void nsSVGUseFrame::ReflowSVG() {
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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*>(GetContent())
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->GetAnimatedLengthValues(&x, &y, nullptr);
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mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(gfxRect(x, y, 0.0, 0.0),
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AppUnitsPerCSSPixel())
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.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 (StyleEffects()->HasFilters()) {
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InvalidateFrame();
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}
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nsSVGGFrame::ReflowSVG();
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}
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void nsSVGUseFrame::NotifySVGChanged(uint32_t aFlags) {
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if (aFlags & COORD_CONTEXT_CHANGED && !(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*>(GetContent());
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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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nsSVGGFrame::NotifySVGChanged(aFlags);
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}
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