зеркало из https://github.com/mozilla/gecko-dev.git
142 строки
4.5 KiB
C++
142 строки
4.5 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 "DOMSVGNumber.h"
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#include "DOMSVGNumberList.h"
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#include "DOMSVGAnimatedNumberList.h"
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#include "SVGAnimatedNumberList.h"
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#include "SVGElement.h"
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#include "nsError.h"
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#include "nsContentUtils.h" // for NS_ENSURE_FINITE
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#include "mozilla/dom/SVGNumberBinding.h"
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#include "mozilla/dom/SVGSVGElement.h"
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// See the architecture comment in DOMSVGAnimatedNumberList.h.
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namespace mozilla::dom {
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// We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
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// clear our list's weak ref to us to be safe. (The other option would be to
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// not unlink and rely on the breaking of the other edges in the cycle, as
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// NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
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NS_IMPL_CYCLE_COLLECTION_CLASS(DOMSVGNumber)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(DOMSVGNumber)
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// We may not belong to a list, so we must null check tmp->mList.
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if (tmp->mList) {
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tmp->mList->mItems[tmp->mListIndex] = nullptr;
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}
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NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mParent)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(DOMSVGNumber)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mParent)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(DOMSVGNumber)
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NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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DOMSVGNumber::DOMSVGNumber(DOMSVGNumberList* aList, uint8_t aAttrEnum,
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uint32_t aListIndex, bool aIsAnimValItem)
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: mList(aList),
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mParent(aList),
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mListIndex(aListIndex),
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mAttrEnum(aAttrEnum),
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mIsAnimValItem(aIsAnimValItem),
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mValue(0.0f) {
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// These shifts are in sync with the members in the header.
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MOZ_ASSERT(aList && aAttrEnum < (1 << 4) && aListIndex <= MaxListIndex(),
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"bad arg");
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
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}
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DOMSVGNumber::DOMSVGNumber(nsISupports* aParent)
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: mList(nullptr),
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mParent(aParent),
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mListIndex(0),
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mAttrEnum(0),
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mIsAnimValItem(false),
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mValue(0.0f) {}
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DOMSVGNumber::DOMSVGNumber(SVGSVGElement* aParent)
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: mList(nullptr),
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mParent(ToSupports(aParent)),
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mListIndex(0),
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mAttrEnum(0),
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mIsAnimValItem(false),
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mValue(0.0f) {}
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float DOMSVGNumber::Value() {
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if (mIsAnimValItem && HasOwner()) {
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Element()->FlushAnimations(); // May make HasOwner() == false
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}
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return HasOwner() ? InternalItem() : mValue;
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}
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void DOMSVGNumber::SetValue(float aValue, ErrorResult& aRv) {
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if (mIsAnimValItem) {
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aRv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
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return;
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}
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if (HasOwner()) {
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if (InternalItem() == aValue) {
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return;
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}
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AutoChangeNumberListNotifier notifier(this);
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InternalItem() = aValue;
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return;
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}
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mValue = aValue;
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}
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void DOMSVGNumber::InsertingIntoList(DOMSVGNumberList* aList, uint8_t aAttrEnum,
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uint32_t aListIndex, bool aIsAnimValItem) {
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NS_ASSERTION(!HasOwner(), "Inserting item that is already in a list");
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mList = aList;
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mAttrEnum = aAttrEnum;
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mListIndex = aListIndex;
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mIsAnimValItem = aIsAnimValItem;
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MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGNumber!");
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}
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void DOMSVGNumber::RemovingFromList() {
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mValue = InternalItem();
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mList = nullptr;
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mIsAnimValItem = false;
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}
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float DOMSVGNumber::ToSVGNumber() {
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return HasOwner() ? InternalItem() : mValue;
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}
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float& DOMSVGNumber::InternalItem() {
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SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
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return mIsAnimValItem && alist->mAnimVal ? (*alist->mAnimVal)[mListIndex]
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: alist->mBaseVal[mListIndex];
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}
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#ifdef DEBUG
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bool DOMSVGNumber::IndexIsValid() {
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SVGAnimatedNumberList* alist = Element()->GetAnimatedNumberList(mAttrEnum);
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return (mIsAnimValItem && mListIndex < alist->GetAnimValue().Length()) ||
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(!mIsAnimValItem && mListIndex < alist->GetBaseValue().Length());
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}
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#endif
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JSObject* DOMSVGNumber::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return SVGNumber_Binding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace mozilla::dom
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