gecko-dev/dom/svg/nsSVGAngle.cpp

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C++

/* -*- 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 "nsSVGAngle.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/dom/SVGMarkerElement.h"
#include "mozilla/Move.h"
#include "nsContentUtils.h" // NS_ENSURE_FINITE
#include "nsSMILValue.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsTextFormatter.h"
#include "SVGAngle.h"
#include "SVGAnimatedAngle.h"
#include "SVGOrientSMILType.h"
using namespace mozilla;
using namespace mozilla::dom;
static nsIAtom** const unitMap[] =
{
nullptr, /* SVG_ANGLETYPE_UNKNOWN */
nullptr, /* SVG_ANGLETYPE_UNSPECIFIED */
&nsGkAtoms::deg,
&nsGkAtoms::rad,
&nsGkAtoms::grad
};
static nsSVGAttrTearoffTable<nsSVGAngle, SVGAnimatedAngle>
sSVGAnimatedAngleTearoffTable;
static nsSVGAttrTearoffTable<nsSVGAngle, SVGAngle>
sBaseSVGAngleTearoffTable;
static nsSVGAttrTearoffTable<nsSVGAngle, SVGAngle>
sAnimSVGAngleTearoffTable;
/* Helper functions */
static bool
IsValidUnitType(uint16_t unit)
{
if (unit > SVG_ANGLETYPE_UNKNOWN &&
unit <= SVG_ANGLETYPE_GRAD)
return true;
return false;
}
static void
GetUnitString(nsAString& unit, uint16_t unitType)
{
if (IsValidUnitType(unitType)) {
if (unitMap[unitType]) {
(*unitMap[unitType])->ToString(unit);
}
return;
}
NS_NOTREACHED("Unknown unit type");
return;
}
static uint16_t
GetUnitTypeForString(const nsAString& unitStr)
{
if (unitStr.IsEmpty())
return SVG_ANGLETYPE_UNSPECIFIED;
nsIAtom *unitAtom = NS_GetStaticAtom(unitStr);
if (unitAtom) {
for (uint32_t i = 0 ; i < ArrayLength(unitMap) ; i++) {
if (unitMap[i] && *unitMap[i] == unitAtom) {
return i;
}
}
}
return SVG_ANGLETYPE_UNKNOWN;
}
static void
GetValueString(nsAString &aValueAsString, float aValue, uint16_t aUnitType)
{
char16_t buf[24];
nsTextFormatter::snprintf(buf, sizeof(buf)/sizeof(char16_t),
u"%g",
(double)aValue);
aValueAsString.Assign(buf);
nsAutoString unitString;
GetUnitString(unitString, aUnitType);
aValueAsString.Append(unitString);
}
static bool
GetValueFromString(const nsAString& aString,
float& aValue,
uint16_t* aUnitType)
{
RangedPtr<const char16_t> iter =
SVGContentUtils::GetStartRangedPtr(aString);
const RangedPtr<const char16_t> end =
SVGContentUtils::GetEndRangedPtr(aString);
if (!SVGContentUtils::ParseNumber(iter, end, aValue)) {
return false;
}
const nsAString& units = Substring(iter.get(), end.get());
*aUnitType = GetUnitTypeForString(units);
return IsValidUnitType(*aUnitType);
}
/* static */ float
nsSVGAngle::GetDegreesPerUnit(uint8_t aUnit)
{
switch (aUnit) {
case SVG_ANGLETYPE_UNSPECIFIED:
case SVG_ANGLETYPE_DEG:
return 1;
case SVG_ANGLETYPE_RAD:
return static_cast<float>(180.0 / M_PI);
case SVG_ANGLETYPE_GRAD:
return 90.0f / 100.0f;
default:
NS_NOTREACHED("Unknown unit type");
return 0;
}
}
void
nsSVGAngle::SetBaseValueInSpecifiedUnits(float aValue,
nsSVGElement *aSVGElement)
{
if (mBaseVal == aValue) {
return;
}
nsAttrValue emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
mBaseVal = aValue;
if (!mIsAnimated) {
mAnimVal = mBaseVal;
}
else {
aSVGElement->AnimationNeedsResample();
}
aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
}
nsresult
nsSVGAngle::ConvertToSpecifiedUnits(uint16_t unitType,
nsSVGElement *aSVGElement)
{
if (!IsValidUnitType(unitType))
return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
if (mBaseValUnit == uint8_t(unitType))
return NS_OK;
nsAttrValue emptyOrOldValue;
if (aSVGElement) {
emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
}
float valueInUserUnits = mBaseVal * GetDegreesPerUnit(mBaseValUnit);
mBaseValUnit = uint8_t(unitType);
// Setting aDoSetAttr to false here will ensure we don't call
// Will/DidChangeAngle a second time (and dispatch duplicate notifications).
SetBaseValue(valueInUserUnits, aSVGElement, false);
if (aSVGElement) {
aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
}
return NS_OK;
}
nsresult
nsSVGAngle::NewValueSpecifiedUnits(uint16_t unitType,
float valueInSpecifiedUnits,
nsSVGElement *aSVGElement)
{
NS_ENSURE_FINITE(valueInSpecifiedUnits, NS_ERROR_ILLEGAL_VALUE);
if (!IsValidUnitType(unitType))
return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
if (mBaseVal == valueInSpecifiedUnits && mBaseValUnit == uint8_t(unitType))
return NS_OK;
nsAttrValue emptyOrOldValue;
if (aSVGElement) {
emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
}
mBaseVal = valueInSpecifiedUnits;
mBaseValUnit = uint8_t(unitType);
if (!mIsAnimated) {
mAnimVal = mBaseVal;
mAnimValUnit = mBaseValUnit;
}
else {
aSVGElement->AnimationNeedsResample();
}
if (aSVGElement) {
aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
}
return NS_OK;
}
already_AddRefed<SVGAngle>
nsSVGAngle::ToDOMBaseVal(nsSVGElement *aSVGElement)
{
RefPtr<SVGAngle> domBaseVal =
sBaseSVGAngleTearoffTable.GetTearoff(this);
if (!domBaseVal) {
domBaseVal = new SVGAngle(this, aSVGElement, SVGAngle::BaseValue);
sBaseSVGAngleTearoffTable.AddTearoff(this, domBaseVal);
}
return domBaseVal.forget();
}
already_AddRefed<SVGAngle>
nsSVGAngle::ToDOMAnimVal(nsSVGElement *aSVGElement)
{
RefPtr<SVGAngle> domAnimVal =
sAnimSVGAngleTearoffTable.GetTearoff(this);
if (!domAnimVal) {
domAnimVal = new SVGAngle(this, aSVGElement, SVGAngle::AnimValue);
sAnimSVGAngleTearoffTable.AddTearoff(this, domAnimVal);
}
return domAnimVal.forget();
}
SVGAngle::~SVGAngle()
{
if (mType == BaseValue) {
sBaseSVGAngleTearoffTable.RemoveTearoff(mVal);
} else if (mType == AnimValue) {
sAnimSVGAngleTearoffTable.RemoveTearoff(mVal);
} else {
delete mVal;
}
}
/* Implementation */
nsresult
nsSVGAngle::SetBaseValueString(const nsAString &aValueAsString,
nsSVGElement *aSVGElement,
bool aDoSetAttr)
{
float value;
uint16_t unitType;
if (!GetValueFromString(aValueAsString, value, &unitType)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
if (mBaseVal == value && mBaseValUnit == uint8_t(unitType)) {
return NS_OK;
}
nsAttrValue emptyOrOldValue;
if (aDoSetAttr) {
emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
}
mBaseVal = value;
mBaseValUnit = uint8_t(unitType);
if (!mIsAnimated) {
mAnimVal = mBaseVal;
mAnimValUnit = mBaseValUnit;
}
else {
aSVGElement->AnimationNeedsResample();
}
if (aDoSetAttr) {
aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
}
return NS_OK;
}
void
nsSVGAngle::GetBaseValueString(nsAString & aValueAsString) const
{
GetValueString(aValueAsString, mBaseVal, mBaseValUnit);
}
void
nsSVGAngle::GetAnimValueString(nsAString & aValueAsString) const
{
GetValueString(aValueAsString, mAnimVal, mAnimValUnit);
}
void
nsSVGAngle::SetBaseValue(float aValue, nsSVGElement *aSVGElement,
bool aDoSetAttr)
{
if (mBaseVal == aValue * GetDegreesPerUnit(mBaseValUnit)) {
return;
}
nsAttrValue emptyOrOldValue;
if (aSVGElement && aDoSetAttr) {
emptyOrOldValue = aSVGElement->WillChangeAngle(mAttrEnum);
}
mBaseVal = aValue / GetDegreesPerUnit(mBaseValUnit);
if (!mIsAnimated) {
mAnimVal = mBaseVal;
}
else {
aSVGElement->AnimationNeedsResample();
}
if (aSVGElement && aDoSetAttr) {
aSVGElement->DidChangeAngle(mAttrEnum, emptyOrOldValue);
}
}
void
nsSVGAngle::SetAnimValue(float aValue, uint8_t aUnit, nsSVGElement *aSVGElement)
{
if (mIsAnimated && mAnimVal == aValue && mAnimValUnit == aUnit) {
return;
}
mAnimVal = aValue;
mAnimValUnit = aUnit;
mIsAnimated = true;
aSVGElement->DidAnimateAngle(mAttrEnum);
}
already_AddRefed<SVGAnimatedAngle>
nsSVGAngle::ToDOMAnimatedAngle(nsSVGElement *aSVGElement)
{
RefPtr<SVGAnimatedAngle> domAnimatedAngle =
sSVGAnimatedAngleTearoffTable.GetTearoff(this);
if (!domAnimatedAngle) {
domAnimatedAngle = new SVGAnimatedAngle(this, aSVGElement);
sSVGAnimatedAngleTearoffTable.AddTearoff(this, domAnimatedAngle);
}
return domAnimatedAngle.forget();
}
SVGAnimatedAngle::~SVGAnimatedAngle()
{
sSVGAnimatedAngleTearoffTable.RemoveTearoff(mVal);
}
nsISMILAttr*
nsSVGAngle::ToSMILAttr(nsSVGElement *aSVGElement)
{
if (aSVGElement->NodeInfo()->Equals(nsGkAtoms::marker, kNameSpaceID_SVG)) {
SVGMarkerElement *marker = static_cast<SVGMarkerElement*>(aSVGElement);
return new SMILOrient(marker->GetOrientType(), this, aSVGElement);
}
// SMILOrient would not be useful for general angle attributes (also,
// "orient" is the only animatable <angle>-valued attribute in SVG 1.1).
NS_NOTREACHED("Trying to animate unknown angle attribute.");
return nullptr;
}
nsresult
nsSVGAngle::SMILOrient::ValueFromString(const nsAString& aStr,
const SVGAnimationElement* /*aSrcElement*/,
nsSMILValue& aValue,
bool& aPreventCachingOfSandwich) const
{
nsSMILValue val(&SVGOrientSMILType::sSingleton);
if (aStr.EqualsLiteral("auto")) {
val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_AUTO;
} else if (aStr.EqualsLiteral("auto-start-reverse")) {
val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_AUTO_START_REVERSE;
} else {
float value;
uint16_t unitType;
if (!GetValueFromString(aStr, value, &unitType)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
val.mU.mOrient.mAngle = value;
val.mU.mOrient.mUnit = unitType;
val.mU.mOrient.mOrientType = SVG_MARKER_ORIENT_ANGLE;
}
aValue = Move(val);
aPreventCachingOfSandwich = false;
return NS_OK;
}
nsSMILValue
nsSVGAngle::SMILOrient::GetBaseValue() const
{
nsSMILValue val(&SVGOrientSMILType::sSingleton);
val.mU.mOrient.mAngle = mAngle->GetBaseValInSpecifiedUnits();
val.mU.mOrient.mUnit = mAngle->GetBaseValueUnit();
val.mU.mOrient.mOrientType = mOrientType->GetBaseValue();
return val;
}
void
nsSVGAngle::SMILOrient::ClearAnimValue()
{
if (mAngle->mIsAnimated) {
mOrientType->SetAnimValue(mOrientType->GetBaseValue());
mAngle->mIsAnimated = false;
mAngle->mAnimVal = mAngle->mBaseVal;
mAngle->mAnimValUnit = mAngle->mBaseValUnit;
mSVGElement->DidAnimateAngle(mAngle->mAttrEnum);
}
}
nsresult
nsSVGAngle::SMILOrient::SetAnimValue(const nsSMILValue& aValue)
{
NS_ASSERTION(aValue.mType == &SVGOrientSMILType::sSingleton,
"Unexpected type to assign animated value");
if (aValue.mType == &SVGOrientSMILType::sSingleton) {
mOrientType->SetAnimValue(aValue.mU.mOrient.mOrientType);
if (aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_AUTO ||
aValue.mU.mOrient.mOrientType == SVG_MARKER_ORIENT_AUTO_START_REVERSE) {
mAngle->SetAnimValue(0.0f, SVG_ANGLETYPE_UNSPECIFIED, mSVGElement);
} else {
mAngle->SetAnimValue(aValue.mU.mOrient.mAngle, aValue.mU.mOrient.mUnit, mSVGElement);
}
}
return NS_OK;
}