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Diffstat (limited to 'dom/svg/SVGAnimatedViewBox.cpp')
| -rw-r--r-- | dom/svg/SVGAnimatedViewBox.cpp | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/dom/svg/SVGAnimatedViewBox.cpp b/dom/svg/SVGAnimatedViewBox.cpp new file mode 100644 index 0000000000..aa5d079909 --- /dev/null +++ b/dom/svg/SVGAnimatedViewBox.cpp @@ -0,0 +1,299 @@ +/* -*- 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 "SVGAnimatedViewBox.h" + +#include "mozAutoDocUpdate.h" +#include "mozilla/Maybe.h" +#include <utility> + +#include "SVGViewBoxSMILType.h" +#include "mozilla/SMILValue.h" +#include "mozilla/SVGContentUtils.h" +#include "mozilla/dom/SVGRect.h" +#include "nsCharSeparatedTokenizer.h" +#include "nsTextFormatter.h" + +using namespace mozilla::dom; + +namespace mozilla { + +#define NUM_VIEWBOX_COMPONENTS 4 + +/* Implementation of SVGViewBox methods */ + +bool SVGViewBox::operator==(const SVGViewBox& aOther) const { + if (&aOther == this) return true; + + return (none && aOther.none) || + (!none && !aOther.none && x == aOther.x && y == aOther.y && + width == aOther.width && height == aOther.height); +} + +/* static */ +nsresult SVGViewBox::FromString(const nsAString& aStr, SVGViewBox* aViewBox) { + if (aStr.EqualsLiteral("none")) { + aViewBox->none = true; + return NS_OK; + } + + nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace, + nsTokenizerFlags::SeparatorOptional> + tokenizer(aStr, ','); + float vals[NUM_VIEWBOX_COMPONENTS]; + uint32_t i; + for (i = 0; i < NUM_VIEWBOX_COMPONENTS && tokenizer.hasMoreTokens(); ++i) { + if (!SVGContentUtils::ParseNumber(tokenizer.nextToken(), vals[i])) { + return NS_ERROR_DOM_SYNTAX_ERR; + } + } + + if (i != NUM_VIEWBOX_COMPONENTS || // Too few values. + tokenizer.hasMoreTokens() || // Too many values. + tokenizer.separatorAfterCurrentToken()) { // Trailing comma. + return NS_ERROR_DOM_SYNTAX_ERR; + } + + aViewBox->x = vals[0]; + aViewBox->y = vals[1]; + aViewBox->width = vals[2]; + aViewBox->height = vals[3]; + aViewBox->none = false; + + return NS_OK; +} + +static SVGAttrTearoffTable<SVGAnimatedViewBox, SVGRect> + sBaseSVGViewBoxTearoffTable; +static SVGAttrTearoffTable<SVGAnimatedViewBox, SVGRect> + sAnimSVGViewBoxTearoffTable; +SVGAttrTearoffTable<SVGAnimatedViewBox, SVGAnimatedRect> + SVGAnimatedViewBox::sSVGAnimatedRectTearoffTable; + +//---------------------------------------------------------------------- +// Helper class: AutoChangeViewBoxNotifier +// Stack-based helper class to pair calls to WillChangeViewBox and +// DidChangeViewBox. +class MOZ_RAII AutoChangeViewBoxNotifier { + public: + AutoChangeViewBoxNotifier(SVGAnimatedViewBox* aViewBox, + SVGElement* aSVGElement, bool aDoSetAttr = true) + : mViewBox(aViewBox), mSVGElement(aSVGElement), mDoSetAttr(aDoSetAttr) { + MOZ_ASSERT(mViewBox, "Expecting non-null viewBox"); + MOZ_ASSERT(mSVGElement, "Expecting non-null element"); + + if (mDoSetAttr) { + mUpdateBatch.emplace(aSVGElement->GetComposedDoc(), true); + mEmptyOrOldValue = mSVGElement->WillChangeViewBox(mUpdateBatch.ref()); + } + } + + ~AutoChangeViewBoxNotifier() { + if (mDoSetAttr) { + mSVGElement->DidChangeViewBox(mEmptyOrOldValue, mUpdateBatch.ref()); + } + if (mViewBox->mAnimVal) { + mSVGElement->AnimationNeedsResample(); + } + } + + private: + SVGAnimatedViewBox* const mViewBox; + SVGElement* const mSVGElement; + Maybe<mozAutoDocUpdate> mUpdateBatch; + nsAttrValue mEmptyOrOldValue; + bool mDoSetAttr; +}; + +/* Implementation of SVGAnimatedViewBox methods */ + +void SVGAnimatedViewBox::Init() { + mHasBaseVal = false; + // We shouldn't use mBaseVal for rendering (its usages should be guarded with + // "mHasBaseVal" checks), but just in case we do by accident, this will + // ensure that we treat it as "none" and ignore its numeric values: + mBaseVal.none = true; + + mAnimVal = nullptr; +} + +bool SVGAnimatedViewBox::HasRect() const { + // Check mAnimVal if we have one; otherwise, check mBaseVal if we have one; + // otherwise, just return false (we clearly do not have a rect). + const SVGViewBox* rect = mAnimVal.get(); + if (!rect) { + if (!mHasBaseVal) { + // no anim val, no base val --> no viewbox rect + return false; + } + rect = &mBaseVal; + } + + return !rect->none && rect->width >= 0 && rect->height >= 0; +} + +void SVGAnimatedViewBox::SetAnimValue(const SVGViewBox& aRect, + SVGElement* aSVGElement) { + if (!mAnimVal) { + // it's okay if allocation fails - and no point in reporting that + mAnimVal = MakeUnique<SVGViewBox>(aRect); + } else { + if (aRect == *mAnimVal) { + return; + } + *mAnimVal = aRect; + } + aSVGElement->DidAnimateViewBox(); +} + +void SVGAnimatedViewBox::SetBaseValue(const SVGViewBox& aRect, + SVGElement* aSVGElement) { + if (!mHasBaseVal || mBaseVal == aRect) { + // This method is used to set a single x, y, width + // or height value. It can't create a base value + // as the other components may be undefined. We record + // the new value though, so as not to lose data. + mBaseVal = aRect; + return; + } + + AutoChangeViewBoxNotifier notifier(this, aSVGElement); + + mBaseVal = aRect; + mHasBaseVal = true; +} + +nsresult SVGAnimatedViewBox::SetBaseValueString(const nsAString& aValue, + SVGElement* aSVGElement, + bool aDoSetAttr) { + SVGViewBox viewBox; + + nsresult rv = SVGViewBox::FromString(aValue, &viewBox); + if (NS_FAILED(rv)) { + return rv; + } + // Comparison against mBaseVal is only valid if we currently have a base val. + if (mHasBaseVal && viewBox == mBaseVal) { + return NS_OK; + } + + AutoChangeViewBoxNotifier notifier(this, aSVGElement, aDoSetAttr); + mHasBaseVal = true; + mBaseVal = viewBox; + + return NS_OK; +} + +void SVGAnimatedViewBox::GetBaseValueString(nsAString& aValue) const { + if (mBaseVal.none) { + aValue.AssignLiteral("none"); + return; + } + nsTextFormatter::ssprintf(aValue, u"%g %g %g %g", (double)mBaseVal.x, + (double)mBaseVal.y, (double)mBaseVal.width, + (double)mBaseVal.height); +} + +already_AddRefed<SVGAnimatedRect> SVGAnimatedViewBox::ToSVGAnimatedRect( + SVGElement* aSVGElement) { + RefPtr<SVGAnimatedRect> domAnimatedRect = + sSVGAnimatedRectTearoffTable.GetTearoff(this); + if (!domAnimatedRect) { + domAnimatedRect = new SVGAnimatedRect(this, aSVGElement); + sSVGAnimatedRectTearoffTable.AddTearoff(this, domAnimatedRect); + } + + return domAnimatedRect.forget(); +} + +already_AddRefed<SVGRect> SVGAnimatedViewBox::ToDOMBaseVal( + SVGElement* aSVGElement) { + if (!mHasBaseVal || mBaseVal.none) { + return nullptr; + } + + RefPtr<SVGRect> domBaseVal = sBaseSVGViewBoxTearoffTable.GetTearoff(this); + if (!domBaseVal) { + domBaseVal = new SVGRect(this, aSVGElement, SVGRect::RectType::BaseValue); + sBaseSVGViewBoxTearoffTable.AddTearoff(this, domBaseVal); + } + + return domBaseVal.forget(); +} + +SVGRect::~SVGRect() { + switch (mType) { + case RectType::BaseValue: + sBaseSVGViewBoxTearoffTable.RemoveTearoff(mVal); + break; + case RectType::AnimValue: + sAnimSVGViewBoxTearoffTable.RemoveTearoff(mVal); + break; + default: + break; + } +} + +already_AddRefed<SVGRect> SVGAnimatedViewBox::ToDOMAnimVal( + SVGElement* aSVGElement) { + if ((mAnimVal && mAnimVal->none) || + (!mAnimVal && (!mHasBaseVal || mBaseVal.none))) { + return nullptr; + } + + RefPtr<SVGRect> domAnimVal = sAnimSVGViewBoxTearoffTable.GetTearoff(this); + if (!domAnimVal) { + domAnimVal = new SVGRect(this, aSVGElement, SVGRect::RectType::AnimValue); + sAnimSVGViewBoxTearoffTable.AddTearoff(this, domAnimVal); + } + + return domAnimVal.forget(); +} + +UniquePtr<SMILAttr> SVGAnimatedViewBox::ToSMILAttr(SVGElement* aSVGElement) { + return MakeUnique<SMILViewBox>(this, aSVGElement); +} + +nsresult SVGAnimatedViewBox::SMILViewBox ::ValueFromString( + const nsAString& aStr, const SVGAnimationElement* /*aSrcElement*/, + SMILValue& aValue, bool& aPreventCachingOfSandwich) const { + SVGViewBox viewBox; + nsresult res = SVGViewBox::FromString(aStr, &viewBox); + if (NS_FAILED(res)) { + return res; + } + SMILValue val(&SVGViewBoxSMILType::sSingleton); + *static_cast<SVGViewBox*>(val.mU.mPtr) = viewBox; + aValue = std::move(val); + + return NS_OK; +} + +SMILValue SVGAnimatedViewBox::SMILViewBox::GetBaseValue() const { + SMILValue val(&SVGViewBoxSMILType::sSingleton); + *static_cast<SVGViewBox*>(val.mU.mPtr) = mVal->mBaseVal; + return val; +} + +void SVGAnimatedViewBox::SMILViewBox::ClearAnimValue() { + if (mVal->mAnimVal) { + mVal->mAnimVal = nullptr; + mSVGElement->DidAnimateViewBox(); + } +} + +nsresult SVGAnimatedViewBox::SMILViewBox::SetAnimValue( + const SMILValue& aValue) { + NS_ASSERTION(aValue.mType == &SVGViewBoxSMILType::sSingleton, + "Unexpected type to assign animated value"); + if (aValue.mType == &SVGViewBoxSMILType::sSingleton) { + SVGViewBox& vb = *static_cast<SVGViewBox*>(aValue.mU.mPtr); + mVal->SetAnimValue(vb, mSVGElement); + } + return NS_OK; +} + +} // namespace mozilla |