diff options
Diffstat (limited to 'dom/svg/DOMSVGNumber.cpp')
| -rw-r--r-- | dom/svg/DOMSVGNumber.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/dom/svg/DOMSVGNumber.cpp b/dom/svg/DOMSVGNumber.cpp new file mode 100644 index 000000000..97d80d4d0 --- /dev/null +++ b/dom/svg/DOMSVGNumber.cpp @@ -0,0 +1,231 @@ +/* -*- 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 "nsSVGElement.h" +#include "nsError.h" +#include "nsContentUtils.h" // for NS_ENSURE_FINITE +#include "mozilla/dom/SVGNumberBinding.h" + +// See the architecture comment in DOMSVGAnimatedNumberList.h. + +namespace mozilla { + +// 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_SCRIPT_OBJECTS +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 + +NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGNumber) +NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGNumber) + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGNumber) + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY + NS_INTERFACE_MAP_ENTRY(nsISupports) +NS_INTERFACE_MAP_END + +//---------------------------------------------------------------------- +// Helper class: AutoChangeNumberNotifier +// Stack-based helper class to pair calls to WillChangeNumberList and +// DidChangeNumberList. +class MOZ_RAII AutoChangeNumberNotifier +{ +public: + explicit AutoChangeNumberNotifier(DOMSVGNumber* aNumber MOZ_GUARD_OBJECT_NOTIFIER_PARAM) + : mNumber(aNumber) + { + MOZ_GUARD_OBJECT_NOTIFIER_INIT; + MOZ_ASSERT(mNumber, "Expecting non-null number"); + MOZ_ASSERT(mNumber->HasOwner(), + "Expecting list to have an owner for notification"); + mEmptyOrOldValue = + mNumber->Element()->WillChangeNumberList(mNumber->mAttrEnum); + } + + ~AutoChangeNumberNotifier() + { + mNumber->Element()->DidChangeNumberList(mNumber->mAttrEnum, + mEmptyOrOldValue); + if (mNumber->mList->IsAnimating()) { + mNumber->Element()->AnimationNeedsResample(); + } + } + +private: + DOMSVGNumber* const mNumber; + nsAttrValue mEmptyOrOldValue; + MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER +}; + +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) +{ +} + +/* static */ already_AddRefed<DOMSVGNumber> +DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, ErrorResult& aRv) +{ + nsCOMPtr<nsPIDOMWindowInner> window = + do_QueryInterface(aGlobal.GetAsSupports()); + if (!window) { + aRv.Throw(NS_ERROR_UNEXPECTED); + return nullptr; + } + + RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window); + return number.forget(); +} + +/* static */ already_AddRefed<DOMSVGNumber> +DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, float aValue, + ErrorResult& aRv) +{ + nsCOMPtr<nsPIDOMWindowInner> window = + do_QueryInterface(aGlobal.GetAsSupports()); + if (!window) { + aRv.Throw(NS_ERROR_UNEXPECTED); + return nullptr; + } + + RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window); + number->SetValue(aValue, aRv); + return number.forget(); +} + +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; + } + AutoChangeNumberNotifier 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 dom::SVGNumberBinding::Wrap(aCx, this, aGivenProto); +} + +} // namespace mozilla |