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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
#include "DOMSVGPoint.h"
#include "DOMSVGPointList.h"
#include "gfx2DGlue.h"
#include "nsError.h"
#include "mozilla/dom/DOMMatrix.h"
#include "mozilla/dom/SVGPointBinding.h"
// See the architecture comment in DOMSVGPointList.h.
using namespace mozilla::gfx;
namespace mozilla::dom {
//----------------------------------------------------------------------
// Helper class: AutoChangePointNotifier
//
class MOZ_RAII AutoChangePointNotifier {
public:
explicit AutoChangePointNotifier(DOMSVGPoint* aValue) : mValue(aValue) {
MOZ_ASSERT(mValue, "Expecting non-null value");
}
~AutoChangePointNotifier() {
if (mValue->IsTranslatePoint()) {
mValue->DidChangeTranslate();
}
}
private:
DOMSVGPoint* const mValue;
};
MOZ_CONSTINIT static SVGAttrTearoffTable<SVGPoint, DOMSVGPoint>
sSVGTranslateTearOffTable;
// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
// clear our list's weak ref to us to be safe. (The other option would be to
// not unlink and rely on the breaking of the other edges in the cycle, as
// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGPoint)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGPoint)
tmp->CleanupWeakRefs();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner)
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGPoint)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwner)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGPoint)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END
JSObject* DOMSVGPoint::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGPoint_Binding::Wrap(aCx, this, aGivenProto);
}
float DOMSVGPoint::X() {
if (mIsAnimValItem && IsInList()) {
Element()->FlushAnimations(); // May make IsInList() == false
}
return InternalItem().mX;
}
void DOMSVGPoint::SetX(float aX, ErrorResult& rv) {
if (mIsAnimValItem) {
rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
auto& val = InternalItem();
if (val.mX == aX) {
return;
}
AutoChangePointListNotifier listNotifier(this);
AutoChangePointNotifier translateNotifier(this);
val.mX = aX;
}
float DOMSVGPoint::Y() {
if (mIsAnimValItem && IsInList()) {
Element()->FlushAnimations(); // May make IsInList() == false
}
return InternalItem().mY;
}
void DOMSVGPoint::SetY(float aY, ErrorResult& rv) {
if (mIsAnimValItem) {
rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
auto& val = InternalItem();
if (val.mY == aY) {
return;
}
AutoChangePointListNotifier listNotifier(this);
AutoChangePointNotifier translateNotifier(this);
val.mY = aY;
}
already_AddRefed<DOMSVGPoint> DOMSVGPoint::MatrixTransform(
const DOMMatrix2DInit& aMatrix, ErrorResult& aRv) {
RefPtr<DOMMatrixReadOnly> matrix =
DOMMatrixReadOnly::FromMatrix(GetParentObject(), aMatrix, aRv);
if (aRv.Failed()) {
return nullptr;
}
const auto* matrix2D = matrix->GetInternal2D();
if (!matrix2D->IsFinite()) {
aRv.ThrowTypeError<MSG_NOT_FINITE>("MatrixTransform matrix");
return nullptr;
}
auto pt = matrix2D->TransformPoint(InternalItem());
return do_AddRef(new DOMSVGPoint(ToPoint(pt)));
}
void DOMSVGPoint::InsertingIntoList(DOMSVGPointList* aList, uint32_t aListIndex,
bool aIsAnimValItem) {
MOZ_RELEASE_ASSERT(!IsInList(), "Inserting item that is already in a list");
MOZ_RELEASE_ASSERT(!mIsTranslatePoint,
"Inserting item that is a currentTranslate");
delete mVal;
mVal = nullptr;
mOwner = aList;
mListIndex = aListIndex;
mIsAnimValItem = aIsAnimValItem;
MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");
}
void DOMSVGPoint::RemovingFromList() {
MOZ_ASSERT(
IsInList(),
"We should start in a list if we're going to be removed from one.");
mVal = new SVGPoint(InternalItem());
mOwner = nullptr;
mIsAnimValItem = false;
}
SVGPoint& DOMSVGPoint::InternalItem() {
if (nsCOMPtr<DOMSVGPointList> pointList = do_QueryInterface(mOwner)) {
return pointList->InternalList().mItems[mListIndex];
}
return *mVal;
}
already_AddRefed<DOMSVGPoint> DOMSVGPoint::GetTranslateTearOff(
SVGPoint* aVal, SVGSVGElement* aSVGSVGElement) {
RefPtr<DOMSVGPoint> domPoint = sSVGTranslateTearOffTable.GetTearoff(aVal);
if (!domPoint) {
domPoint = new DOMSVGPoint(aVal, aSVGSVGElement);
sSVGTranslateTearOffTable.AddTearoff(aVal, domPoint);
}
return domPoint.forget();
}
bool DOMSVGPoint::AttrIsAnimating() const {
nsCOMPtr<DOMSVGPointList> pointList = do_QueryInterface(mOwner);
return pointList && pointList->AttrIsAnimating();
}
void DOMSVGPoint::DidChangeTranslate() {
nsCOMPtr<SVGSVGElement> svg = do_QueryInterface(mOwner);
MOZ_ASSERT(svg);
nsContentUtils::AddScriptRunner(
NewRunnableMethod("dom::SVGSVGElement::DidChangeTranslate", svg,
&SVGSVGElement::DidChangeTranslate));
}
SVGElement* DOMSVGPoint::Element() {
if (nsCOMPtr<DOMSVGPointList> pointList = do_QueryInterface(mOwner)) {
return pointList->Element();
}
nsCOMPtr<SVGSVGElement> svg = do_QueryInterface(mOwner);
return svg;
}
void DOMSVGPoint::CleanupWeakRefs() {
// Our mList's weak ref to us must be nulled out when we die (or when we're
// cycle collected), so we that don't leave behind a pointer to
// free / soon-to-be-free memory.
if (nsCOMPtr<DOMSVGPointList> pointList = do_QueryInterface(mOwner)) {
MOZ_ASSERT(pointList->mItems[mListIndex] == this,
"Clearing out the wrong list index...?");
pointList->mItems[mListIndex] = nullptr;
}
if (mVal) {
if (mIsTranslatePoint) {
// Similarly, we must update the tearoff table to remove its (non-owning)
// pointer to mVal.
sSVGTranslateTearOffTable.RemoveTearoff(mVal);
} else {
// In this case we own mVal
delete mVal;
}
mVal = nullptr;
}
}
#ifdef DEBUG
bool DOMSVGPoint::IndexIsValid() {
nsCOMPtr<DOMSVGPointList> pointList = do_QueryInterface(mOwner);
return mListIndex < pointList->InternalList().Length();
}
#endif
} // namespace mozilla::dom