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/* -*- 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 "SVGAnimatedNumber.h"
#include "mozilla/Attributes.h"
#include "mozilla/SMILValue.h"
#include "mozilla/SVGContentUtils.h"
#include "nsContentUtils.h"
#include "SMILFloatType.h"
#include "SVGAttrTearoffTable.h"
using namespace mozilla::dom;
namespace mozilla {
/* Implementation */
//----------------------------------------------------------------------
// Helper class: AutoChangeNumberNotifier
// Stack-based helper class to ensure DidChangeNumber is called.
class MOZ_RAII AutoChangeNumberNotifier {
public:
AutoChangeNumberNotifier(SVGAnimatedNumber* aNumber, SVGElement* aSVGElement)
: mNumber(aNumber), mSVGElement(aSVGElement) {
MOZ_ASSERT(mNumber, "Expecting non-null number");
MOZ_ASSERT(mSVGElement, "Expecting non-null element");
}
~AutoChangeNumberNotifier() {
mSVGElement->DidChangeNumber(mNumber->mAttrEnum);
if (mNumber->mIsAnimated) {
mSVGElement->AnimationNeedsResample();
}
}
private:
SVGAnimatedNumber* const mNumber;
SVGElement* const mSVGElement;
};
static SVGAttrTearoffTable<SVGAnimatedNumber,
SVGAnimatedNumber::DOMAnimatedNumber>
sSVGAnimatedNumberTearoffTable;
static bool GetValueFromString(const nsAString& aString,
bool aPercentagesAllowed, float& aValue) {
bool success;
auto token = SVGContentUtils::GetAndEnsureOneToken(aString, success);
if (!success) {
return false;
}
RangedPtr<const char16_t> iter = SVGContentUtils::GetStartRangedPtr(token);
const RangedPtr<const char16_t> end = SVGContentUtils::GetEndRangedPtr(token);
if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
return false;
}
if (aPercentagesAllowed) {
const nsAString& units = Substring(iter.get(), end.get());
if (units.EqualsLiteral("%")) {
aValue /= 100;
return true;
}
}
return iter == end;
}
nsresult SVGAnimatedNumber::SetBaseValueString(const nsAString& aValueAsString,
SVGElement* aSVGElement) {
float val;
if (!GetValueFromString(aValueAsString,
aSVGElement->NumberAttrAllowsPercentage(mAttrEnum),
val)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
mBaseVal = val;
mIsBaseSet = true;
if (!mIsAnimated) {
mAnimVal = mBaseVal;
} else {
aSVGElement->AnimationNeedsResample();
}
// We don't need to call DidChange* here - we're only called by
// SVGElement::ParseAttribute under Element::SetAttr,
// which takes care of notifying.
return NS_OK;
}
void SVGAnimatedNumber::GetBaseValueString(nsAString& aValueAsString) {
aValueAsString.Truncate();
aValueAsString.AppendFloat(mBaseVal);
}
void SVGAnimatedNumber::SetBaseValue(float aValue, SVGElement* aSVGElement) {
if (mIsBaseSet && aValue == mBaseVal) {
return;
}
AutoChangeNumberNotifier notifier(this, aSVGElement);
mBaseVal = aValue;
mIsBaseSet = true;
if (!mIsAnimated) {
mAnimVal = mBaseVal;
}
}
void SVGAnimatedNumber::SetAnimValue(float aValue, SVGElement* aSVGElement) {
if (mIsAnimated && aValue == mAnimVal) {
return;
}
mAnimVal = aValue;
mIsAnimated = true;
aSVGElement->DidAnimateNumber(mAttrEnum);
}
already_AddRefed<DOMSVGAnimatedNumber> SVGAnimatedNumber::ToDOMAnimatedNumber(
SVGElement* aSVGElement) {
RefPtr<DOMAnimatedNumber> domAnimatedNumber =
sSVGAnimatedNumberTearoffTable.GetTearoff(this);
if (!domAnimatedNumber) {
domAnimatedNumber = new DOMAnimatedNumber(this, aSVGElement);
sSVGAnimatedNumberTearoffTable.AddTearoff(this, domAnimatedNumber);
}
return domAnimatedNumber.forget();
}
SVGAnimatedNumber::DOMAnimatedNumber::~DOMAnimatedNumber() {
sSVGAnimatedNumberTearoffTable.RemoveTearoff(mVal);
}
UniquePtr<SMILAttr> SVGAnimatedNumber::ToSMILAttr(SVGElement* aSVGElement) {
return MakeUnique<SMILNumber>(this, aSVGElement);
}
nsresult SVGAnimatedNumber::SMILNumber::ValueFromString(
const nsAString& aStr,
const mozilla::dom::SVGAnimationElement* /*aSrcElement*/, SMILValue& aValue,
bool& aPreventCachingOfSandwich) const {
float value;
if (!GetValueFromString(
aStr, mSVGElement->NumberAttrAllowsPercentage(mVal->mAttrEnum),
value)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
SMILValue val(SMILFloatType::Singleton());
val.mU.mDouble = value;
aValue = val;
aPreventCachingOfSandwich = false;
return NS_OK;
}
SMILValue SVGAnimatedNumber::SMILNumber::GetBaseValue() const {
SMILValue val(SMILFloatType::Singleton());
val.mU.mDouble = mVal->mBaseVal;
return val;
}
void SVGAnimatedNumber::SMILNumber::ClearAnimValue() {
if (mVal->mIsAnimated) {
mVal->mIsAnimated = false;
mVal->mAnimVal = mVal->mBaseVal;
mSVGElement->DidAnimateNumber(mVal->mAttrEnum);
}
}
nsresult SVGAnimatedNumber::SMILNumber::SetAnimValue(const SMILValue& aValue) {
NS_ASSERTION(aValue.mType == SMILFloatType::Singleton(),
"Unexpected type to assign animated value");
if (aValue.mType == SMILFloatType::Singleton()) {
mVal->SetAnimValue(float(aValue.mU.mDouble), mSVGElement);
}
return NS_OK;
}
} // namespace mozilla
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