diff options
Diffstat (limited to 'dom/svg/SVGAnimatedEnumeration.cpp')
| -rw-r--r-- | dom/svg/SVGAnimatedEnumeration.cpp | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedEnumeration.cpp b/dom/svg/SVGAnimatedEnumeration.cpp new file mode 100644 index 0000000000..52ea0f215f --- /dev/null +++ b/dom/svg/SVGAnimatedEnumeration.cpp @@ -0,0 +1,203 @@ +/* -*- 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 "SVGAnimatedEnumeration.h" + +#include "mozilla/dom/SVGElement.h" +#include "mozilla/SMILValue.h" +#include "nsAtom.h" +#include "nsError.h" +#include "SMILEnumType.h" +#include "SVGAttrTearoffTable.h" + +using namespace mozilla::dom; + +namespace mozilla { + +//---------------------------------------------------------------------- +// Helper class: AutoChangeEnumNotifier +// Stack-based helper class to ensure DidChangeEnum is called. +class MOZ_RAII AutoChangeEnumNotifier { + public: + AutoChangeEnumNotifier(SVGAnimatedEnumeration* aEnum, SVGElement* aSVGElement, + bool aDoSetAttr = true) + : mEnum(aEnum), mSVGElement(aSVGElement), mDoSetAttr(aDoSetAttr) { + MOZ_ASSERT(mEnum, "Expecting non-null enum"); + MOZ_ASSERT(mSVGElement, "Expecting non-null element"); + } + + ~AutoChangeEnumNotifier() { + if (mDoSetAttr) { + mSVGElement->DidChangeEnum(mEnum->mAttrEnum); + } + if (mEnum->mIsAnimated) { + mSVGElement->AnimationNeedsResample(); + } + } + + private: + SVGAnimatedEnumeration* const mEnum; + SVGElement* const mSVGElement; + bool mDoSetAttr; +}; + +static SVGAttrTearoffTable<SVGAnimatedEnumeration, + SVGAnimatedEnumeration::DOMAnimatedEnum> + sSVGAnimatedEnumTearoffTable; + +const SVGEnumMapping* SVGAnimatedEnumeration::GetMapping( + SVGElement* aSVGElement) { + SVGElement::EnumAttributesInfo info = aSVGElement->GetEnumInfo(); + + NS_ASSERTION(info.mCount > 0 && mAttrEnum < info.mCount, + "mapping request for a non-attrib enum"); + + return info.mInfos[mAttrEnum].mMapping; +} + +bool SVGAnimatedEnumeration::SetBaseValueAtom(const nsAtom* aValue, + SVGElement* aSVGElement) { + const SVGEnumMapping* mapping = GetMapping(aSVGElement); + + while (mapping && mapping->mKey) { + if (aValue == mapping->mKey) { + if (!mIsBaseSet || mBaseVal != mapping->mVal) { + mIsBaseSet = true; + // We don't need to call DidChange* here - we're only called by + // SVGElement::ParseAttribute under Element::SetAttr, + // which takes care of notifying. + AutoChangeEnumNotifier notifier(this, aSVGElement, false); + + mBaseVal = mapping->mVal; + if (!mIsAnimated) { + mAnimVal = mBaseVal; + } + } + return true; + } + mapping++; + } + + return false; +} + +nsAtom* SVGAnimatedEnumeration::GetBaseValueAtom(SVGElement* aSVGElement) { + const SVGEnumMapping* mapping = GetMapping(aSVGElement); + + while (mapping && mapping->mKey) { + if (mBaseVal == mapping->mVal) { + return mapping->mKey; + } + mapping++; + } + NS_ERROR("unknown enumeration value"); + return nsGkAtoms::_empty; +} + +void SVGAnimatedEnumeration::SetBaseValue(uint16_t aValue, + SVGElement* aSVGElement, + ErrorResult& aRv) { + const SVGEnumMapping* mapping = GetMapping(aSVGElement); + + while (mapping && mapping->mKey) { + if (mapping->mVal == aValue) { + if (!mIsBaseSet || mBaseVal != uint8_t(aValue)) { + mIsBaseSet = true; + AutoChangeEnumNotifier notifier(this, aSVGElement); + + mBaseVal = uint8_t(aValue); + if (!mIsAnimated) { + mAnimVal = mBaseVal; + } + } + return; + } + mapping++; + } + return aRv.ThrowTypeError("Invalid SVGAnimatedEnumeration base value"); +} + +void SVGAnimatedEnumeration::SetAnimValue(uint16_t aValue, + SVGElement* aSVGElement) { + if (mIsAnimated && aValue == mAnimVal) { + return; + } + mAnimVal = aValue; + mIsAnimated = true; + aSVGElement->DidAnimateEnum(mAttrEnum); +} + +already_AddRefed<DOMSVGAnimatedEnumeration> +SVGAnimatedEnumeration::ToDOMAnimatedEnum(SVGElement* aSVGElement) { + RefPtr<DOMAnimatedEnum> domAnimatedEnum = + sSVGAnimatedEnumTearoffTable.GetTearoff(this); + if (!domAnimatedEnum) { + domAnimatedEnum = new DOMAnimatedEnum(this, aSVGElement); + sSVGAnimatedEnumTearoffTable.AddTearoff(this, domAnimatedEnum); + } + + return domAnimatedEnum.forget(); +} + +SVGAnimatedEnumeration::DOMAnimatedEnum::~DOMAnimatedEnum() { + sSVGAnimatedEnumTearoffTable.RemoveTearoff(mVal); +} + +UniquePtr<SMILAttr> SVGAnimatedEnumeration::ToSMILAttr( + SVGElement* aSVGElement) { + return MakeUnique<SMILEnum>(this, aSVGElement); +} + +nsresult SVGAnimatedEnumeration::SMILEnum::ValueFromString( + const nsAString& aStr, const SVGAnimationElement* /*aSrcElement*/, + SMILValue& aValue, bool& aPreventCachingOfSandwich) const { + nsAtom* valAtom = NS_GetStaticAtom(aStr); + if (valAtom) { + const SVGEnumMapping* mapping = mVal->GetMapping(mSVGElement); + + while (mapping && mapping->mKey) { + if (valAtom == mapping->mKey) { + SMILValue val(SMILEnumType::Singleton()); + val.mU.mUint = mapping->mVal; + aValue = val; + return NS_OK; + } + mapping++; + } + } + + // only a warning since authors may mistype attribute values + NS_WARNING("unknown enumeration key"); + return NS_ERROR_FAILURE; +} + +SMILValue SVGAnimatedEnumeration::SMILEnum::GetBaseValue() const { + SMILValue val(SMILEnumType::Singleton()); + val.mU.mUint = mVal->mBaseVal; + return val; +} + +void SVGAnimatedEnumeration::SMILEnum::ClearAnimValue() { + if (mVal->mIsAnimated) { + mVal->mIsAnimated = false; + mVal->mAnimVal = mVal->mBaseVal; + mSVGElement->DidAnimateEnum(mVal->mAttrEnum); + } +} + +nsresult SVGAnimatedEnumeration::SMILEnum::SetAnimValue( + const SMILValue& aValue) { + NS_ASSERTION(aValue.mType == SMILEnumType::Singleton(), + "Unexpected type to assign animated value"); + if (aValue.mType == SMILEnumType::Singleton()) { + MOZ_ASSERT(aValue.mU.mUint <= USHRT_MAX, + "Very large enumerated value - too big for uint16_t"); + mVal->SetAnimValue(uint16_t(aValue.mU.mUint), mSVGElement); + } + return NS_OK; +} + +} // namespace mozilla |