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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 "DOMSVGNumber.h"
#include "DOMSVGNumberList.h"
#include "DOMSVGAnimatedNumberList.h"
#include "SVGAnimatedNumberList.h"
#include "SVGElement.h"
#include "nsError.h"
#include "nsContentUtils.h" // for NS_ENSURE_FINITE
#include "mozilla/dom/SVGNumberBinding.h"
#include "mozilla/dom/SVGSVGElement.h"
// See the architecture comment in DOMSVGAnimatedNumberList.h.
namespace mozilla::dom {
// 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(DOMSVGNumber)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGNumber)
// We may not belong to a list, so we must null check tmp->mList.
if (tmp->mList) {
tmp->mList->mItems[tmp->mListIndex] = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGNumber)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGNumber)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END
DOMSVGNumber::DOMSVGNumber(DOMSVGNumberList* aList, uint8_t aAttrEnum,
uint32_t aListIndex, bool aIsAnimValItem)
: mList(aList),
mParent(aList),
mListIndex(aListIndex),
mAttrEnum(aAttrEnum),
mIsAnimValItem(aIsAnimValItem),
mValue(0.0f) {
// These shifts are in sync with the members in the header.
MOZ_ASSERT(aList && aAttrEnum < (1 << 4) && aListIndex <= MaxListIndex(),
"bad arg");
MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
}
DOMSVGNumber::DOMSVGNumber(nsISupports* aParent)
: mList(nullptr),
mParent(aParent),
mListIndex(0),
mAttrEnum(0),
mIsAnimValItem(false),
mValue(0.0f) {}
DOMSVGNumber::DOMSVGNumber(SVGSVGElement* aParent)
: mList(nullptr),
mParent(ToSupports(aParent)),
mListIndex(0),
mAttrEnum(0),
mIsAnimValItem(false),
mValue(0.0f) {}
float DOMSVGNumber::Value() {
if (mIsAnimValItem && HasOwner()) {
Element()->FlushAnimations(); // May make HasOwner() == false
}
return HasOwner() ? InternalItem() : mValue;
}
void DOMSVGNumber::SetValue(float aValue, ErrorResult& aRv) {
if (mIsAnimValItem) {
aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
if (HasOwner()) {
if (InternalItem() == aValue) {
return;
}
AutoChangeNumberListNotifier notifier(this);
InternalItem() = aValue;
return;
}
mValue = aValue;
}
void DOMSVGNumber::InsertingIntoList(DOMSVGNumberList* aList, uint8_t aAttrEnum,
uint32_t aListIndex, bool aIsAnimValItem) {
NS_ASSERTION(!HasOwner(), "Inserting item that is already in a list");
mList = aList;
mAttrEnum = aAttrEnum;
mListIndex = aListIndex;
mIsAnimValItem = aIsAnimValItem;
MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
}
void DOMSVGNumber::RemovingFromList() {
mValue = InternalItem();
mList = nullptr;
mIsAnimValItem = false;
}
float DOMSVGNumber::ToSVGNumber() {
return HasOwner() ? InternalItem() : mValue;
}
float& DOMSVGNumber::InternalItem() {
SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
return mIsAnimValItem && alist->mAnimVal ? (*alist->mAnimVal)[mListIndex]
: alist->mBaseVal[mListIndex];
}
#ifdef DEBUG
bool DOMSVGNumber::IndexIsValid() {
SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
return (mIsAnimValItem && mListIndex < alist->GetAnimValue().Length()) ||
(!mIsAnimValItem && mListIndex < alist->GetBaseValue().Length());
}
#endif
JSObject* DOMSVGNumber::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGNumber_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace mozilla::dom
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