mirror of
https://github.com/classilla/tenfourfox.git
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230 lines
6.4 KiB
C++
230 lines
6.4 KiB
C++
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/* -*- 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 "nsSVGElement.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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// See the architecture comment in DOMSVGAnimatedNumberList.h.
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namespace mozilla {
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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_SCRIPT_OBJECTS
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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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NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGNumber)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGNumber)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGNumber)
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NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
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NS_INTERFACE_MAP_ENTRY(nsISupports)
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NS_INTERFACE_MAP_END
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//----------------------------------------------------------------------
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// Helper class: AutoChangeNumberNotifier
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// Stack-based helper class to pair calls to WillChangeNumberList and
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// DidChangeNumberList.
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class MOZ_RAII AutoChangeNumberNotifier
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{
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public:
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explicit AutoChangeNumberNotifier(DOMSVGNumber* aNumber MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: mNumber(aNumber)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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MOZ_ASSERT(mNumber, "Expecting non-null number");
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MOZ_ASSERT(mNumber->HasOwner(),
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"Expecting list to have an owner for notification");
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mEmptyOrOldValue =
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mNumber->Element()->WillChangeNumberList(mNumber->mAttrEnum);
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}
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~AutoChangeNumberNotifier()
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{
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mNumber->Element()->DidChangeNumberList(mNumber->mAttrEnum,
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mEmptyOrOldValue);
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if (mNumber->mList->IsAnimating()) {
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mNumber->Element()->AnimationNeedsResample();
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}
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}
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private:
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DOMSVGNumber* const mNumber;
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nsAttrValue mEmptyOrOldValue;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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DOMSVGNumber::DOMSVGNumber(DOMSVGNumberList *aList,
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uint8_t aAttrEnum,
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uint32_t aListIndex,
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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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{
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// These shifts are in sync with the members in the header.
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MOZ_ASSERT(aList &&
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aAttrEnum < (1 << 4) &&
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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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{
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}
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/* static */ already_AddRefed<DOMSVGNumber>
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DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, ErrorResult& aRv)
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{
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.GetAsSupports());
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if (!window) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window);
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return number.forget();
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}
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/* static */ already_AddRefed<DOMSVGNumber>
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DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, float aValue,
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ErrorResult& aRv)
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{
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nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal.GetAsSupports());
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if (!window) {
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aRv.Throw(NS_ERROR_UNEXPECTED);
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return nullptr;
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}
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RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window);
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number->SetValue(aValue, aRv);
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return number.forget();
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}
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float
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DOMSVGNumber::Value()
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{
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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
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DOMSVGNumber::SetValue(float aValue, ErrorResult& aRv)
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{
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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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AutoChangeNumberNotifier 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
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DOMSVGNumber::InsertingIntoList(DOMSVGNumberList *aList,
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uint8_t aAttrEnum,
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uint32_t aListIndex,
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bool aIsAnimValItem)
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{
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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
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DOMSVGNumber::RemovingFromList()
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{
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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
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DOMSVGNumber::ToSVGNumber()
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{
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return HasOwner() ? InternalItem() : mValue;
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}
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float&
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DOMSVGNumber::InternalItem()
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{
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SVGAnimatedNumberList *alist = Element()->GetAnimatedNumberList(mAttrEnum);
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return mIsAnimValItem && alist->mAnimVal ?
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(*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
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DOMSVGNumber::IndexIsValid()
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{
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SVGAnimatedNumberList *alist = Element()->GetAnimatedNumberList(mAttrEnum);
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return (mIsAnimValItem &&
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mListIndex < alist->GetAnimValue().Length()) ||
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(!mIsAnimValItem &&
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mListIndex < alist->GetBaseValue().Length());
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}
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#endif
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JSObject*
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DOMSVGNumber::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return dom::SVGNumberBinding::Wrap(aCx, this, aGivenProto);
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}
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} // namespace mozilla
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