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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "SVGUseFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/MutationEvent.h"
#include "mozilla/dom/SVGUseElement.h"
#include "nsLayoutUtils.h"
using namespace mozilla::dom;
//----------------------------------------------------------------------
// Implementation
nsIFrame* NS_NewSVGUseFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGUseFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGUseFrame)
//----------------------------------------------------------------------
// nsIFrame methods:
void SVGUseFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::use),
"Content is not an SVG use!");
mHasValidDimensions =
static_cast<SVGUseElement*>(aContent)->HasValidDimensions();
SVGGFrame::Init(aContent, aParent, aPrevInFlow);
}
nsresult SVGUseFrame::AttributeChanged(int32_t aNamespaceID, nsAtom* aAttribute,
int32_t aModType) {
// Currently our SMIL implementation does not modify the DOM attributes. Once
// we implement the SVG 2 SMIL behaviour this can be removed
// SVGUseElement::AfterSetAttr's implementation will be sufficient.
if (aModType == MutationEvent_Binding::SMIL) {
auto* content = SVGUseElement::FromNode(GetContent());
content->ProcessAttributeChange(aNamespaceID, aAttribute);
}
return SVGGFrame::AttributeChanged(aNamespaceID, aAttribute, aModType);
}
void SVGUseFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
SVGGFrame::DidSetComputedStyle(aOldComputedStyle);
if (!aOldComputedStyle) {
return;
}
const auto* newSVGReset = StyleSVGReset();
const auto* oldSVGReset = aOldComputedStyle->StyleSVGReset();
if (newSVGReset->mX != oldSVGReset->mX ||
newSVGReset->mY != oldSVGReset->mY) {
// make sure our cached transform matrix gets (lazily) updated
mCanvasTM = nullptr;
SVGUtils::ScheduleReflowSVG(this);
SVGUtils::NotifyChildrenOfSVGChange(this, TRANSFORM_CHANGED);
}
}
void SVGUseFrame::DimensionAttributeChanged(bool aHadValidDimensions,
bool aAttributeIsUsed) {
bool invalidate = aAttributeIsUsed;
if (mHasValidDimensions != aHadValidDimensions) {
mHasValidDimensions = !mHasValidDimensions;
invalidate = true;
}
if (invalidate) {
nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(this);
}
}
void SVGUseFrame::HrefChanged() {
nsLayoutUtils::PostRestyleEvent(GetContent()->AsElement(), RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(this);
}
//----------------------------------------------------------------------
// ISVGDisplayableFrame methods
void SVGUseFrame::ReflowSVG() {
// We only handle x/y offset here, since any width/height that is in force is
// handled by the SVGOuterSVGFrame for the anonymous <svg> that will be
// created for that purpose.
auto [x, y] = ResolvePosition();
mRect.MoveTo(nsLayoutUtils::RoundGfxRectToAppRect(gfxRect(x, y, 0, 0),
AppUnitsPerCSSPixel())
.TopLeft());
// If we have a filter, we need to invalidate ourselves because filter
// output can change even if none of our descendants need repainting.
if (StyleEffects()->HasFilters()) {
InvalidateFrame();
}
SVGGFrame::ReflowSVG();
}
void SVGUseFrame::NotifySVGChanged(uint32_t aFlags) {
if (aFlags & COORD_CONTEXT_CHANGED && !(aFlags & TRANSFORM_CHANGED)) {
// Coordinate context changes affect mCanvasTM if we have a
// percentage 'x' or 'y'
if (StyleSVGReset()->mX.HasPercent() || StyleSVGReset()->mY.HasPercent()) {
aFlags |= TRANSFORM_CHANGED;
// Ancestor changes can't affect how we render from the perspective of
// any rendering observers that we may have, so we don't need to
// invalidate them. We also don't need to invalidate ourself, since our
// changed ancestor will have invalidated its entire area, which includes
// our area.
// For perf reasons we call this before calling NotifySVGChanged() below.
SVGUtils::ScheduleReflowSVG(this);
}
}
// We don't remove the TRANSFORM_CHANGED flag here if we have a viewBox or
// non-percentage width/height, since if they're set then they are cloned to
// an anonymous child <svg>, and its SVGInnerSVGFrame will do that.
SVGGFrame::NotifySVGChanged(aFlags);
}
SVGBBox SVGUseFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
uint32_t aFlags) {
SVGBBox bbox =
SVGDisplayContainerFrame::GetBBoxContribution(aToBBoxUserspace, aFlags);
if (aFlags & SVGUtils::eForGetClientRects) {
auto [x, y] = ResolvePosition();
bbox.MoveBy(x, y);
}
return bbox;
}
std::pair<float, float> SVGUseFrame::ResolvePosition() const {
auto* content = SVGUseElement::FromNode(GetContent());
return std::make_pair(SVGContentUtils::CoordToFloat(
content, StyleSVGReset()->mX, SVGContentUtils::X),
SVGContentUtils::CoordToFloat(
content, StyleSVGReset()->mY, SVGContentUtils::Y));
}
} // namespace mozilla
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