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gecko-dev/layout/style/StyleAnimationValue.cpp

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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/. */
/* Utilities for animation of computed style values */
#include "mozilla/ArrayUtils.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/RuleNodeCacheConditions.h"
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/Tuple.h"
#include "mozilla/UniquePtr.h"
#include "nsStyleTransformMatrix.h"
#include "nsAutoPtr.h"
#include "nsCOMArray.h"
#include "nsIStyleRule.h"
#include "mozilla/css/StyleRule.h"
#include "nsString.h"
#include "nsStyleContext.h"
#include "nsStyleSet.h"
#include "nsComputedDOMStyle.h"
#include "nsCSSParser.h"
#include "nsCSSPseudoElements.h"
#include "mozilla/css/Declaration.h"
#include "mozilla/dom/Element.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/Likely.h"
#include "mozilla/ServoBindings.h" // RawServoDeclarationBlock
#include "gfxMatrix.h"
#include "gfxQuaternion.h"
#include "nsIDocument.h"
#include "nsIFrame.h"
#include "gfx2DGlue.h"
using namespace mozilla;
using namespace mozilla::css;
using namespace mozilla::gfx;
using nsStyleTransformMatrix::Decompose2DMatrix;
using nsStyleTransformMatrix::Decompose3DMatrix;
using nsStyleTransformMatrix::ShearType;
// HELPER METHODS
// --------------
/*
* Given two units, this method returns a common unit that they can both be
* converted into, if possible. This is intended to facilitate
* interpolation, distance-computation, and addition between "similar" units.
*
* The ordering of the arguments should not affect the output of this method.
*
* If there's no sensible common unit, this method returns eUnit_Null.
*
* @param aFirstUnit One unit to resolve.
* @param aFirstUnit The other unit to resolve.
* @return A "common" unit that both source units can be converted into, or
* eUnit_Null if that's not possible.
*/
static
StyleAnimationValue::Unit
GetCommonUnit(nsCSSPropertyID aProperty,
StyleAnimationValue::Unit aFirstUnit,
StyleAnimationValue::Unit aSecondUnit)
{
if (aFirstUnit != aSecondUnit) {
if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_STORES_CALC) &&
(aFirstUnit == StyleAnimationValue::eUnit_Coord ||
aFirstUnit == StyleAnimationValue::eUnit_Percent ||
aFirstUnit == StyleAnimationValue::eUnit_Calc) &&
(aSecondUnit == StyleAnimationValue::eUnit_Coord ||
aSecondUnit == StyleAnimationValue::eUnit_Percent ||
aSecondUnit == StyleAnimationValue::eUnit_Calc)) {
// We can use calc() as the common unit.
return StyleAnimationValue::eUnit_Calc;
}
if ((aFirstUnit == StyleAnimationValue::eUnit_Color ||
aFirstUnit == StyleAnimationValue::eUnit_CurrentColor ||
aFirstUnit == StyleAnimationValue::eUnit_ComplexColor) &&
(aSecondUnit == StyleAnimationValue::eUnit_Color ||
aSecondUnit == StyleAnimationValue::eUnit_CurrentColor ||
aSecondUnit == StyleAnimationValue::eUnit_ComplexColor)) {
// We can use complex color as the common unit.
return StyleAnimationValue::eUnit_ComplexColor;
}
return StyleAnimationValue::eUnit_Null;
}
return aFirstUnit;
}
static
nsCSSUnit
GetCommonUnit(nsCSSPropertyID aProperty,
nsCSSUnit aFirstUnit,
nsCSSUnit aSecondUnit)
{
if (aFirstUnit != aSecondUnit) {
if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_STORES_CALC) &&
(aFirstUnit == eCSSUnit_Pixel ||
aFirstUnit == eCSSUnit_Percent ||
aFirstUnit == eCSSUnit_Calc) &&
(aSecondUnit == eCSSUnit_Pixel ||
aSecondUnit == eCSSUnit_Percent ||
aSecondUnit == eCSSUnit_Calc)) {
// We can use calc() as the common unit.
return eCSSUnit_Calc;
}
return eCSSUnit_Null;
}
return aFirstUnit;
}
static nsCSSKeyword
ToPrimitive(nsCSSKeyword aKeyword)
{
switch (aKeyword) {
case eCSSKeyword_translatex:
case eCSSKeyword_translatey:
case eCSSKeyword_translatez:
case eCSSKeyword_translate:
return eCSSKeyword_translate3d;
case eCSSKeyword_scalex:
case eCSSKeyword_scaley:
case eCSSKeyword_scalez:
case eCSSKeyword_scale:
return eCSSKeyword_scale3d;
default:
return aKeyword;
}
}
static bool
HasAccumulateMatrix(const nsCSSValueList* aList)
{
const nsCSSValueList *item = aList;
do {
nsCSSKeyword func =
nsStyleTransformMatrix::TransformFunctionOf(item->mValue.GetArrayValue());
if (func == eCSSKeyword_accumulatematrix) {
return true;
}
item = item->mNext;
} while (item);
return false;
}
static bool
TransformFunctionsMatch(nsCSSKeyword func1, nsCSSKeyword func2)
{
// Handle eCSSKeyword_accumulatematrix as different function to be calculated
// (decomposed and recomposed) them later.
if (func1 == eCSSKeyword_accumulatematrix ||
func2 == eCSSKeyword_accumulatematrix) {
return false;
}
return ToPrimitive(func1) == ToPrimitive(func2);
}
static bool
TransformFunctionListsMatch(const nsCSSValueList *list1,
const nsCSSValueList *list2)
{
const nsCSSValueList *item1 = list1, *item2 = list2;
do {
nsCSSKeyword func1 = nsStyleTransformMatrix::TransformFunctionOf(
item1->mValue.GetArrayValue());
nsCSSKeyword func2 = nsStyleTransformMatrix::TransformFunctionOf(
item2->mValue.GetArrayValue());
if (!TransformFunctionsMatch(func1, func2)) {
return false;
}
item1 = item1->mNext;
item2 = item2->mNext;
} while (item1 && item2);
// Length match?
return !item1 && !item2;
}
static already_AddRefed<nsCSSValue::Array>
AppendFunction(nsCSSKeyword aTransformFunction)
{
uint32_t nargs;
switch (aTransformFunction) {
case eCSSKeyword_matrix3d:
nargs = 16;
break;
case eCSSKeyword_matrix:
nargs = 6;
break;
case eCSSKeyword_rotate3d:
nargs = 4;
break;
case eCSSKeyword_interpolatematrix:
case eCSSKeyword_accumulatematrix:
case eCSSKeyword_translate3d:
case eCSSKeyword_scale3d:
nargs = 3;
break;
case eCSSKeyword_translate:
case eCSSKeyword_skew:
case eCSSKeyword_scale:
nargs = 2;
break;
default:
NS_ERROR("must be a transform function");
MOZ_FALLTHROUGH;
case eCSSKeyword_translatex:
case eCSSKeyword_translatey:
case eCSSKeyword_translatez:
case eCSSKeyword_scalex:
case eCSSKeyword_scaley:
case eCSSKeyword_scalez:
case eCSSKeyword_skewx:
case eCSSKeyword_skewy:
case eCSSKeyword_rotate:
case eCSSKeyword_rotatex:
case eCSSKeyword_rotatey:
case eCSSKeyword_rotatez:
case eCSSKeyword_perspective:
nargs = 1;
break;
}
RefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(nargs + 1);
arr->Item(0).SetIntValue(aTransformFunction, eCSSUnit_Enumerated);
return arr.forget();
}
static already_AddRefed<nsCSSValue::Array>
ToPrimitive(nsCSSValue::Array* aArray)
{
nsCSSKeyword tfunc = nsStyleTransformMatrix::TransformFunctionOf(aArray);
nsCSSKeyword primitive = ToPrimitive(tfunc);
RefPtr<nsCSSValue::Array> arr = AppendFunction(primitive);
// FIXME: This would produce fewer calc() expressions if the
// zero were of compatible type (length vs. percent) when
// needed.
nsCSSValue zero(0.0f, eCSSUnit_Pixel);
nsCSSValue one(1.0f, eCSSUnit_Number);
switch(tfunc) {
case eCSSKeyword_translate:
{
MOZ_ASSERT(aArray->Count() == 2 || aArray->Count() == 3,
"unexpected count");
arr->Item(1) = aArray->Item(1);
arr->Item(2) = aArray->Count() == 3 ? aArray->Item(2) : zero;
arr->Item(3) = zero;
break;
}
case eCSSKeyword_translatex:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = aArray->Item(1);
arr->Item(2) = zero;
arr->Item(3) = zero;
break;
}
case eCSSKeyword_translatey:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = zero;
arr->Item(2) = aArray->Item(1);
arr->Item(3) = zero;
break;
}
case eCSSKeyword_translatez:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = zero;
arr->Item(2) = zero;
arr->Item(3) = aArray->Item(1);
break;
}
case eCSSKeyword_scale:
{
MOZ_ASSERT(aArray->Count() == 2 || aArray->Count() == 3,
"unexpected count");
arr->Item(1) = aArray->Item(1);
arr->Item(2) = aArray->Count() == 3 ? aArray->Item(2) : aArray->Item(1);
arr->Item(3) = one;
break;
}
case eCSSKeyword_scalex:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = aArray->Item(1);
arr->Item(2) = one;
arr->Item(3) = one;
break;
}
case eCSSKeyword_scaley:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = one;
arr->Item(2) = aArray->Item(1);
arr->Item(3) = one;
break;
}
case eCSSKeyword_scalez:
{
MOZ_ASSERT(aArray->Count() == 2, "unexpected count");
arr->Item(1) = one;
arr->Item(2) = one;
arr->Item(3) = aArray->Item(1);
break;
}
default:
arr = aArray;
}
return arr.forget();
}
static void
AppendCSSShadowValue(const nsCSSShadowItem *aShadow,
nsCSSValueList **&aResultTail)
{
MOZ_ASSERT(aShadow, "shadow expected");
// X, Y, Radius, Spread, Color, Inset
RefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(6);
arr->Item(0).SetIntegerCoordValue(aShadow->mXOffset);
arr->Item(1).SetIntegerCoordValue(aShadow->mYOffset);
arr->Item(2).SetIntegerCoordValue(aShadow->mRadius);
// NOTE: This code sometimes stores mSpread: 0 even when
// the parser would be required to leave it null.
arr->Item(3).SetIntegerCoordValue(aShadow->mSpread);
if (aShadow->mHasColor) {
arr->Item(4).SetColorValue(aShadow->mColor);
}
if (aShadow->mInset) {
arr->Item(5).SetIntValue(uint8_t(StyleBoxShadowType::Inset),
eCSSUnit_Enumerated);
}
nsCSSValueList *resultItem = new nsCSSValueList;
resultItem->mValue.SetArrayValue(arr, eCSSUnit_Array);
*aResultTail = resultItem;
aResultTail = &resultItem->mNext;
}
// Like nsStyleCoord::CalcValue, but with length in float pixels instead
// of nscoord.
struct PixelCalcValue
{
float mLength, mPercent;
bool mHasPercent;
};
// Requires a canonical calc() value that we generated.
static PixelCalcValue
ExtractCalcValueInternal(const nsCSSValue& aValue)
{
MOZ_ASSERT(aValue.GetUnit() == eCSSUnit_Calc, "unexpected unit");
nsCSSValue::Array *arr = aValue.GetArrayValue();
MOZ_ASSERT(arr->Count() == 1, "unexpected length");
const nsCSSValue &topval = arr->Item(0);
PixelCalcValue result;
if (topval.GetUnit() == eCSSUnit_Pixel) {
result.mLength = topval.GetFloatValue();
result.mPercent = 0.0f;
result.mHasPercent = false;
} else {
MOZ_ASSERT(topval.GetUnit() == eCSSUnit_Calc_Plus,
"unexpected unit");
nsCSSValue::Array *arr2 = topval.GetArrayValue();
const nsCSSValue &len = arr2->Item(0);
const nsCSSValue &pct = arr2->Item(1);
MOZ_ASSERT(len.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
MOZ_ASSERT(pct.GetUnit() == eCSSUnit_Percent, "unexpected unit");
result.mLength = len.GetFloatValue();
result.mPercent = pct.GetPercentValue();
result.mHasPercent = true;
}
return result;
}
// Requires a canonical calc() value that we generated.
static PixelCalcValue
ExtractCalcValue(const StyleAnimationValue& aValue)
{
PixelCalcValue result;
if (aValue.GetUnit() == StyleAnimationValue::eUnit_Coord) {
result.mLength =
nsPresContext::AppUnitsToFloatCSSPixels(aValue.GetCoordValue());
result.mPercent = 0.0f;
result.mHasPercent = false;
return result;
}
if (aValue.GetUnit() == StyleAnimationValue::eUnit_Percent) {
result.mLength = 0.0f;
result.mPercent = aValue.GetPercentValue();
result.mHasPercent = true;
return result;
}
MOZ_ASSERT(aValue.GetUnit() == StyleAnimationValue::eUnit_Calc,
"unexpected unit");
nsCSSValue *val = aValue.GetCSSValueValue();
return ExtractCalcValueInternal(*val);
}
static PixelCalcValue
ExtractCalcValue(const nsCSSValue& aValue)
{
PixelCalcValue result;
if (aValue.GetUnit() == eCSSUnit_Pixel) {
result.mLength = aValue.GetFloatValue();
result.mPercent = 0.0f;
result.mHasPercent = false;
return result;
}
if (aValue.GetUnit() == eCSSUnit_Percent) {
result.mLength = 0.0f;
result.mPercent = aValue.GetPercentValue();
result.mHasPercent = true;
return result;
}
return ExtractCalcValueInternal(aValue);
}
static void
CalcValueToCSSValue(const nsStyleCoord::CalcValue* aCalc, nsCSSValue& aValue)
{
aValue.SetCalcValue(aCalc);
}
static void
CalcValueToCSSValue(const PixelCalcValue& aCalc, nsCSSValue& aValue)
{
RefPtr<nsCSSValue::Array> arr = nsCSSValue::Array::Create(1);
if (!aCalc.mHasPercent) {
arr->Item(0).SetFloatValue(aCalc.mLength, eCSSUnit_Pixel);
} else {
nsCSSValue::Array *arr2 = nsCSSValue::Array::Create(2);
arr->Item(0).SetArrayValue(arr2, eCSSUnit_Calc_Plus);
arr2->Item(0).SetFloatValue(aCalc.mLength, eCSSUnit_Pixel);
arr2->Item(1).SetPercentValue(aCalc.mPercent);
}
aValue.SetArrayValue(arr, eCSSUnit_Calc);
}
double
CalcPositionSquareDistance(const nsCSSValue& aPos1,
const nsCSSValue& aPos2)
{
NS_ASSERTION(aPos1.GetUnit() == eCSSUnit_Array &&
aPos2.GetUnit() == eCSSUnit_Array,
"Expected two arrays");
PixelCalcValue calcVal[4];
nsCSSValue::Array* posArray = aPos1.GetArrayValue();
MOZ_ASSERT(posArray->Count() == 4, "Invalid position value");
NS_ASSERTION(posArray->Item(0).GetUnit() == eCSSUnit_Null &&
posArray->Item(2).GetUnit() == eCSSUnit_Null,
"Invalid list used");
for (int i = 0; i < 2; ++i) {
MOZ_ASSERT(posArray->Item(i*2+1).GetUnit() != eCSSUnit_Null,
"Invalid position value");
calcVal[i] = ExtractCalcValue(posArray->Item(i*2+1));
}
posArray = aPos2.GetArrayValue();
MOZ_ASSERT(posArray->Count() == 4, "Invalid position value");
NS_ASSERTION(posArray->Item(0).GetUnit() == eCSSUnit_Null &&
posArray->Item(2).GetUnit() == eCSSUnit_Null,
"Invalid list used");
for (int i = 0; i < 2; ++i) {
MOZ_ASSERT(posArray->Item(i*2+1).GetUnit() != eCSSUnit_Null,
"Invalid position value");
calcVal[i+2] = ExtractCalcValue(posArray->Item(i*2+1));
}
double squareDistance = 0.0;
for (int i = 0; i < 2; ++i) {
float difflen = calcVal[i+2].mLength - calcVal[i].mLength;
float diffpct = calcVal[i+2].mPercent - calcVal[i].mPercent;
squareDistance += difflen * difflen + diffpct * diffpct;
}
return squareDistance;
}
static PixelCalcValue
CalcBackgroundCoord(const nsCSSValue& aCoord)
{
NS_ASSERTION(aCoord.GetUnit() == eCSSUnit_Array,
"Expected array");
nsCSSValue::Array* array = aCoord.GetArrayValue();
MOZ_ASSERT(array->Count() == 2 &&
array->Item(0).GetUnit() == eCSSUnit_Null &&
array->Item(1).GetUnit() != eCSSUnit_Null,
"Invalid position value");
return ExtractCalcValue(array->Item(1));
}
double
CalcPositionCoordSquareDistance(const nsCSSValue& aPos1,
const nsCSSValue& aPos2)
{
PixelCalcValue calcVal1 = CalcBackgroundCoord(aPos1);
PixelCalcValue calcVal2 = CalcBackgroundCoord(aPos2);
float difflen = calcVal2.mLength - calcVal1.mLength;
float diffpct = calcVal2.mPercent - calcVal1.mPercent;
return difflen * difflen + diffpct * diffpct;
}
// Ensure that a float/double value isn't NaN by returning zero instead
// (NaN doesn't have a sign) as a general restriction for floating point
// values in RestrictValue.
template<typename T>
MOZ_ALWAYS_INLINE T
EnsureNotNan(T aValue)
{
return aValue;
}
template<>
MOZ_ALWAYS_INLINE float
EnsureNotNan(float aValue)
{
// This would benefit from a MOZ_FLOAT_IS_NaN if we had one.
return MOZ_LIKELY(!mozilla::IsNaN(aValue)) ? aValue : 0;
}
template<>
MOZ_ALWAYS_INLINE double
EnsureNotNan(double aValue)
{
return MOZ_LIKELY(!mozilla::IsNaN(aValue)) ? aValue : 0;
}
template <typename T>
T
RestrictValue(uint32_t aRestrictions, T aValue)
{
T result = EnsureNotNan(aValue);
switch (aRestrictions) {
case 0:
break;
case CSS_PROPERTY_VALUE_NONNEGATIVE:
if (result < 0) {
result = 0;
}
break;
case CSS_PROPERTY_VALUE_AT_LEAST_ONE:
if (result < 1) {
result = 1;
}
break;
default:
MOZ_ASSERT(false, "bad value restriction");
break;
}
return result;
}
template <typename T>
T
RestrictValue(nsCSSPropertyID aProperty, T aValue)
{
return RestrictValue(nsCSSProps::ValueRestrictions(aProperty), aValue);
}
static void
AddCSSValueAngle(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
if (aValue1.GetUnit() == aValue2.GetUnit()) {
// To avoid floating point error, if the units match, maintain the unit.
aResult.SetFloatValue(
EnsureNotNan(aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue()),
aValue1.GetUnit());
} else {
aResult.SetFloatValue(
EnsureNotNan(aCoeff1 * aValue1.GetAngleValueInRadians() +
aCoeff2 * aValue2.GetAngleValueInRadians()),
eCSSUnit_Radian);
}
}
static inline void
AddCSSValuePercent(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult, uint32_t aValueRestrictions = 0)
{
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Percent, "unexpected unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Percent, "unexpected unit");
aResult.SetPercentValue(RestrictValue(aValueRestrictions,
aCoeff1 * aValue1.GetPercentValue() +
aCoeff2 * aValue2.GetPercentValue()));
}
// Add two canonical-form calc values (eUnit_Calc) to make another
// canonical-form calc value.
static void
AddCSSValueCanonicalCalc(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
PixelCalcValue v1 = ExtractCalcValue(aValue1);
PixelCalcValue v2 = ExtractCalcValue(aValue2);
PixelCalcValue result;
result.mLength = aCoeff1 * v1.mLength + aCoeff2 * v2.mLength;
result.mPercent = aCoeff1 * v1.mPercent + aCoeff2 * v2.mPercent;
result.mHasPercent = v1.mHasPercent || v2.mHasPercent;
MOZ_ASSERT(result.mHasPercent || result.mPercent == 0.0f,
"can't have a nonzero percentage part without having percentages");
CalcValueToCSSValue(result, aResult);
}
static inline void
AddCSSValuePixel(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult, uint32_t aValueRestrictions = 0)
{
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Pixel, "unexpected unit");
aResult.SetFloatValue(RestrictValue(aValueRestrictions,
aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue()),
eCSSUnit_Pixel);
}
static bool
AddCSSValuePixelPercentCalc(const uint32_t aValueRestrictions,
const nsCSSUnit aCommonUnit,
double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
switch (aCommonUnit) {
case eCSSUnit_Pixel:
AddCSSValuePixel(aCoeff1, aValue1,
aCoeff2, aValue2,
aResult, aValueRestrictions);
break;
case eCSSUnit_Percent:
AddCSSValuePercent(aCoeff1, aValue1,
aCoeff2, aValue2,
aResult, aValueRestrictions);
break;
case eCSSUnit_Calc:
AddCSSValueCanonicalCalc(aCoeff1, aValue1,
aCoeff2, aValue2,
aResult);
break;
default:
return false;
}
return true;
}
static void
AddTransformTranslate(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
// Only three possible units: eCSSUnit_Pixel, eCSSUnit_Percent, or
// eCSSUnit_Calc.
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Percent ||
aValue1.GetUnit() == eCSSUnit_Pixel ||
aValue1.IsCalcUnit(),
"unexpected unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Percent ||
aValue2.GetUnit() == eCSSUnit_Pixel ||
aValue2.IsCalcUnit(),
"unexpected unit");
AddCSSValuePixelPercentCalc(0,
(aValue1.GetUnit() != aValue2.GetUnit() ||
aValue1.IsCalcUnit())
? eCSSUnit_Calc
: aValue1.GetUnit(),
aCoeff1, aValue1,
aCoeff2, aValue2,
aResult);
}
// Unclamped AddWeightedColors.
static RGBAColorData
AddWeightedColors(double aCoeff1, const RGBAColorData& aValue1,
double aCoeff2, const RGBAColorData& aValue2)
{
float factor1 = aValue1.mA * aCoeff1;
float factor2 = aValue2.mA * aCoeff2;
float resultA = factor1 + factor2;
if (resultA <= 0.0) {
return {0, 0, 0, 0};
}
if (resultA > 1.0) {
resultA = 1.0;
}
float resultFactor = 1.0f / resultA;
return RGBAColorData(
(aValue1.mR * factor1 + aValue2.mR * factor2) * resultFactor,
(aValue1.mG * factor1 + aValue2.mG * factor2) * resultFactor,
(aValue1.mB * factor1 + aValue2.mB * factor2) * resultFactor,
resultA);
}
// CLASS METHODS
// -------------
static RGBAColorData
ExtractColor(const nsCSSValue& aValue)
{
MOZ_ASSERT(aValue.IsNumericColorUnit(), "The unit should be color");
// PercentageRGBColor and PercentageRGBAColor component value might be
// greater than 1.0 in case when the color value is accumulated, so we
// can't use nsCSSValue::GetColorValue() here because that function
// clamps its values.
if (aValue.GetUnit() == eCSSUnit_PercentageRGBColor ||
aValue.GetUnit() == eCSSUnit_PercentageRGBAColor) {
nsCSSValueFloatColor* floatColor = aValue.GetFloatColorValue();
return {
floatColor->Comp1(),
floatColor->Comp2(),
floatColor->Comp3(),
floatColor->Alpha()
};
}
return RGBAColorData(aValue.GetColorValue());
}
static RGBAColorData
ExtractColor(const StyleAnimationValue& aValue)
{
MOZ_ASSERT(aValue.GetUnit() == StyleAnimationValue::eUnit_Color);
nsCSSValue* value = aValue.GetCSSValueValue();
MOZ_ASSERT(value, "CSS value must be valid");
return ExtractColor(*value);
}
static ComplexColorData
ExtractComplexColor(const StyleAnimationValue& aValue)
{
switch (aValue.GetUnit()) {
case StyleAnimationValue::eUnit_Color:
return ComplexColorData(ExtractColor(aValue), 0.0f);
case StyleAnimationValue::eUnit_CurrentColor:
return ComplexColorData({0, 0, 0, 0}, 1.0f);
case StyleAnimationValue::eUnit_ComplexColor:
return ComplexColorData(aValue.GetComplexColorData());
default:
MOZ_ASSERT_UNREACHABLE("Unknown unit");
return ComplexColorData({0, 0, 0, 0}, 0.0f);
}
}
StyleAnimationValue
StyleAnimationValue::Add(nsCSSPropertyID aProperty,
const StyleAnimationValue& aA,
StyleAnimationValue&& aB)
{
StyleAnimationValue result(Move(aB));
Unit commonUnit =
GetCommonUnit(aProperty, result.GetUnit(), aA.GetUnit());
switch (commonUnit) {
case eUnit_Color: {
RGBAColorData color1 = ExtractColor(result);
RGBAColorData color2 = ExtractColor(aA);
result.mValue.mCSSValue->SetRGBAColorValue(
AddWeightedColors(1.0, color1, 1, color2));
break;
}
case eUnit_Filter:
case eUnit_Shadow: {
// If |aA| has no function list, don't concatinate anything, just return
// |aB| as the result.
if (aA.GetCSSValueListValue()->mValue.GetUnit() == eCSSUnit_None) {
break;
}
UniquePtr<nsCSSValueList> resultList(aA.GetCSSValueListValue()->Clone());
// If |aB| has function list, concatinate it to |aA|, then return
// the concatinated list.
if (result.GetCSSValueListValue()->mValue.GetUnit() != eCSSUnit_None) {
nsCSSValueList* listA = resultList.get();
while (listA->mNext) {
listA = listA->mNext;
}
listA->mNext = result.GetCSSValueListValue();
}
result.mValue.mCSSValueList = resultList.release();
break;
}
case eUnit_Transform: {
// If |aA| is 'transform:none', don't concatinate anything, just return
// |aB| as the result.
if (aA.GetCSSValueSharedListValue()->mHead->mValue.GetUnit() ==
eCSSUnit_None) {
break;
}
UniquePtr<nsCSSValueList>
resultList(aA.GetCSSValueSharedListValue()->mHead->Clone());
// If |aB| is not 'transform:none', concatinate it to |aA|, then return
// the concatinated list.
if (result.GetCSSValueSharedListValue()->mHead->mValue.GetUnit() !=
eCSSUnit_None) {
nsCSSValueList* listA = resultList.get();
while (listA->mNext) {
listA = listA->mNext;
}
listA->mNext = result.GetCSSValueSharedListValue()->mHead->Clone();
}
result.SetTransformValue(new nsCSSValueSharedList(resultList.release()));
break;
}
default:
Unused << AddWeighted(aProperty,
1.0, result,
1, aA,
result);
break;
}
return result;
}
double
StyleAnimationValue::ComputeColorDistance(const RGBAColorData& aStartColor,
const RGBAColorData& aEndColor)
{
// http://www.w3.org/TR/smil-animation/#animateColorElement says
// that we should use Euclidean RGB cube distance. However, we
// have to extend that to RGBA. For now, we'll just use the
// Euclidean distance in the (part of the) 4-cube of premultiplied
// colors.
double startA = aStartColor.mA;
double startR = aStartColor.mR * startA;
double startG = aStartColor.mG * startA;
double startB = aStartColor.mB * startA;
double endA = aEndColor.mA;
double endR = aEndColor.mR * endA;
double endG = aEndColor.mG * endA;
double endB = aEndColor.mB * endA;
double diffA = startA - endA;
double diffR = startR - endR;
double diffG = startG - endG;
double diffB = startB - endB;
return sqrt(diffA * diffA + diffR * diffR + diffG * diffG + diffB * diffB);
}
enum class ColorAdditionType {
Clamped, // Clamp each color channel after adding.
Unclamped // Do not clamp color channels after adding.
};
static UniquePtr<nsCSSValueList>
AddWeightedFilterFunction(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
ColorAdditionType aColorAdditionType);
static inline float
GetNumberOrPercent(const nsCSSValue &aValue);
static bool
ComputeSingleShadowSquareDistance(const nsCSSValueList* aShadow1,
const nsCSSValueList* aShadow2,
double& aSquareDistance)
{
MOZ_ASSERT(aShadow1->mValue.GetUnit() == eCSSUnit_Array, "wrong unit");
MOZ_ASSERT(aShadow2->mValue.GetUnit() == eCSSUnit_Array, "wrong unit");
const nsCSSValue::Array* array1 = aShadow1->mValue.GetArrayValue();
const nsCSSValue::Array* array2 = aShadow2->mValue.GetArrayValue();
double squareDistance = 0.0;
// X, Y, Radius, Spread
for (size_t i = 0; i < 4; ++i) {
MOZ_ASSERT(array1->Item(i).GetUnit() == eCSSUnit_Pixel,
"unexpected unit");
MOZ_ASSERT(array2->Item(i).GetUnit() == eCSSUnit_Pixel,
"unexpected unit");
double diff = array1->Item(i).GetFloatValue() -
array2->Item(i).GetFloatValue();
squareDistance += diff * diff;
}
// Color, Inset
const nsCSSValue& color1 = array1->Item(4);
const nsCSSValue& color2 = array2->Item(4);
const nsCSSValue& inset1 = array1->Item(5);
const nsCSSValue& inset2 = array2->Item(5);
if ((color1.GetUnit() != color2.GetUnit() &&
(!color1.IsNumericColorUnit() ||
!color2.IsNumericColorUnit())) ||
inset1 != inset2) {
// According to AddWeightedShadowItems, we don't know how to animate
// between color and no-color, or between inset and not-inset,
// so we cannot compute the distance either.
// Note: There are only two possible states of the inset value:
// (1) GetUnit() == eCSSUnit_Null
// (2) GetUnit() == eCSSUnit_Enumerated &&
// GetIntValue() == NS_STYLE_BOX_SHADOW_INSET
return false;
}
// We compute the distance of colors only if both are numeric color units.
if (color1.GetUnit() != eCSSUnit_Null) {
double colorDistance =
StyleAnimationValue::ComputeColorDistance(ExtractColor(color1),
ExtractColor(color2));
squareDistance += colorDistance * colorDistance;
}
aSquareDistance = squareDistance;
return true;
}
// Return false if we cannot compute the distance between these filter
// functions.
static bool
ComputeFilterSquareDistance(const nsCSSValueList* aList1,
const nsCSSValueList* aList2,
double& aSquareDistance)
{
MOZ_ASSERT(aList1, "expected filter list");
MOZ_ASSERT(aList2, "expected filter list");
MOZ_ASSERT(aList1->mValue.GetUnit() == eCSSUnit_Function,
"expected function");
MOZ_ASSERT(aList2->mValue.GetUnit() == eCSSUnit_Function,
"expected function");
RefPtr<nsCSSValue::Array> a1 = aList1->mValue.GetArrayValue();
RefPtr<nsCSSValue::Array> a2 = aList2->mValue.GetArrayValue();
nsCSSKeyword filterFunction = a1->Item(0).GetKeywordValue();
if (filterFunction != a2->Item(0).GetKeywordValue()) {
return false;
}
const nsCSSValue& func1 = a1->Item(1);
const nsCSSValue& func2 = a2->Item(1);
switch (filterFunction) {
case eCSSKeyword_blur: {
nsCSSValue diff;
// In AddWeightedFilterFunctionImpl, blur may have different units, so we
// use eCSSUnit_Calc for that case.
if (!AddCSSValuePixelPercentCalc(0,
func1.GetUnit() == func2.GetUnit()
? func1.GetUnit()
: eCSSUnit_Calc,
1.0, func2,
-1.0, func1,
diff)) {
return false;
}
// ExtractCalcValue makes sure mHasPercent and mPercent are correct.
PixelCalcValue v = ExtractCalcValue(diff);
aSquareDistance = v.mLength * v.mLength + v.mPercent * v.mPercent;
break;
}
case eCSSKeyword_grayscale:
case eCSSKeyword_invert:
case eCSSKeyword_sepia:
case eCSSKeyword_brightness:
case eCSSKeyword_contrast:
case eCSSKeyword_opacity:
case eCSSKeyword_saturate: {
double diff =
EnsureNotNan(GetNumberOrPercent(func2) - GetNumberOrPercent(func1));
aSquareDistance = diff * diff;
break;
}
case eCSSKeyword_hue_rotate: {
nsCSSValue v;
AddCSSValueAngle(1.0, func2, -1.0, func1, v);
double diff = v.GetAngleValueInRadians();
aSquareDistance = diff * diff;
break;
}
case eCSSKeyword_drop_shadow: {
MOZ_ASSERT(!func1.GetListValue()->mNext && !func2.GetListValue()->mNext,
"drop-shadow filter func doesn't support lists");
if (!ComputeSingleShadowSquareDistance(func1.GetListValue(),
func2.GetListValue(),
aSquareDistance)) {
return false;
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE("unknown filter function");
return false;
}
return true;
}
static bool
ComputeFilterListDistance(const nsCSSValueList* aList1,
const nsCSSValueList* aList2,
double& aDistance)
{
double squareDistance = 0.0;
while (aList1 || aList2) {
// Return false if one of the lists is neither none nor a function.
if ((aList1 && aList1->mValue.GetUnit() != eCSSUnit_Function) ||
(aList2 && aList2->mValue.GetUnit() != eCSSUnit_Function)) {
return false;
}
MOZ_ASSERT(aList1 || aList2, "one function list item must not be null");
double currentSquareDistance = 0.0;
if (!aList1) {
// This is a tricky to get an equivalent none filter function by 0.0
// coefficients. Although we don't guarantee this function can get the
// correct default values, it can reuse the code from the interpolation.
UniquePtr<nsCSSValueList> none =
AddWeightedFilterFunction(0, aList2, 0, aList2,
ColorAdditionType::Clamped);
if (!ComputeFilterSquareDistance(none.get(), aList2,
currentSquareDistance)) {
return false;
}
aList2 = aList2->mNext;
} else if (!aList2) {
UniquePtr<nsCSSValueList> none =
AddWeightedFilterFunction(0, aList1, 0, aList1,
ColorAdditionType::Clamped);
if (!ComputeFilterSquareDistance(aList1, none.get(),
currentSquareDistance)) {
return false;
}
aList1 = aList1->mNext;
} else {
if (!ComputeFilterSquareDistance(aList1, aList2,
currentSquareDistance)) {
return false;
}
aList1 = aList1->mNext;
aList2 = aList2->mNext;
}
squareDistance += currentSquareDistance;
}
aDistance = sqrt(squareDistance);
return true;
}
enum class Restrictions {
Enable,
Disable
};
static already_AddRefed<nsCSSValue::Array>
AddShapeFunction(nsCSSPropertyID aProperty,
double aCoeff1, const nsCSSValue::Array* aArray1,
double aCoeff2, const nsCSSValue::Array* aArray2,
Restrictions aRestriction = Restrictions::Enable);
static bool
ComputeShapeDistance(nsCSSPropertyID aProperty,
const nsCSSValue::Array* aArray1,
const nsCSSValue::Array* aArray2,
double& aDistance)
{
// Use AddShapeFunction to get the difference between two shape functions.
RefPtr<nsCSSValue::Array> diffShape =
AddShapeFunction(aProperty, 1.0, aArray2, -1.0, aArray1,
Restrictions::Disable);
if (!diffShape) {
return false;
}
// A helper function to convert a calc() diff value into a double distance.
auto pixelCalcDistance = [](const PixelCalcValue& aValue) {
MOZ_ASSERT(aValue.mHasPercent || aValue.mPercent == 0.0f,
"can't have a nonzero percentage part without having percentages");
return aValue.mLength * aValue.mLength + aValue.mPercent * aValue.mPercent;
};
double squareDistance = 0.0;
const nsCSSValue::Array* func = diffShape->Item(0).GetArrayValue();
nsCSSKeyword shapeFuncName = func->Item(0).GetKeywordValue();
switch (shapeFuncName) {
case eCSSKeyword_ellipse:
case eCSSKeyword_circle: {
// Skip the first element which is the function keyword.
// Also, skip the last element which is an array for <position>
const size_t len = func->Count();
for (size_t i = 1; i < len - 1; ++i) {
squareDistance += pixelCalcDistance(ExtractCalcValue(func->Item(i)));
}
// Only iterate over elements 1 and 3. The <position> is 'uncomputed' to
// only those elements. See also the comment in SetPositionValue.
for (size_t i = 1; i < 4; i += 2) {
const nsCSSValue& value = func->Item(len - 1).GetArrayValue()->Item(i);
squareDistance += pixelCalcDistance(ExtractCalcValue(value));
}
break;
}
case eCSSKeyword_polygon: {
// Don't care about the first element which is the function keyword, and
// the second element which is the fill rule.
const nsCSSValuePairList* list = func->Item(2).GetPairListValue();
do {
squareDistance += pixelCalcDistance(ExtractCalcValue(list->mXValue)) +
pixelCalcDistance(ExtractCalcValue(list->mYValue));
list = list->mNext;
} while (list);
break;
}
case eCSSKeyword_inset: {
// Items 1-4 are respectively the top, right, bottom and left offsets
// from the reference box.
for (size_t i = 1; i <= 4; ++i) {
const nsCSSValue& value = func->Item(i);
squareDistance += pixelCalcDistance(ExtractCalcValue(value));
}
// Item 5 contains the radii of the rounded corners for the inset
// rectangle.
const nsCSSValue::Array* array = func->Item(5).GetArrayValue();
const size_t len = array->Count();
for (size_t i = 0; i < len; ++i) {
const nsCSSValuePair& pair = array->Item(i).GetPairValue();
squareDistance += pixelCalcDistance(ExtractCalcValue(pair.mXValue)) +
pixelCalcDistance(ExtractCalcValue(pair.mYValue));
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE("Unknown shape type");
}
aDistance = sqrt(squareDistance);
return true;
}
static nsCSSValueList*
AddTransformLists(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
nsCSSKeyword aOperatorType = eCSSKeyword_interpolatematrix);
static double
ComputeTransform2DMatrixDistance(const Matrix& aMatrix1,
const Matrix& aMatrix2)
{
Point3D scale1(1, 1, 1);
Point3D translate1;
gfxQuaternion rotate1;
nsStyleTransformMatrix::ShearArray shear1{0.0f, 0.0f, 0.0f};
Decompose2DMatrix(aMatrix1, scale1, shear1, rotate1, translate1);
Point3D scale2(1, 1, 1);
Point3D translate2;
gfxQuaternion rotate2;
nsStyleTransformMatrix::ShearArray shear2{0.0f, 0.0f, 0.0f};
Decompose2DMatrix(aMatrix2, scale2, shear2, rotate2, translate2);
// Note:
// 1. Shear factor is the tangent value of shear angle, so we need to
// call atan() to get the angle. For 2D transform, we only have XYSHEAR.
// 2. The quaternion vector of the decomposed 2d matrix is got by
// "gfxQuaternion(0, 0, sin(rotate/2), cos(rotate/2))"
// ^^^^^^^^^^^^^ ^^^^^^^^^^^^^
// z w
// Therefore, we can get the rotate angle by 2 * atan2f(z, w).
//
// However, we can also get the rotate angle by the inner product of
// two quaternion vectors, just as what we do for eCSSKeyword_rotate3d.
// e.g.
// rotate3d(0, 0, 1, 60deg) => rotate3d(0, 0, 1, 120deg);
// quaternion 1: (0, 0, sin(30deg), cos(30deg)) = (0, 0, 1/2, sqrt(3)/2)
// quaternion 2: (0, 0, sin(60deg), cos(60deg)) = (0, 0, sqrt(3)/2, 1/2)
// inner product: sqrt(3)/4 + sqrt(3)/4 = sqrt(3)/2
// Finally, the rotate angle: 2 * acos(sqrt(3)/2) = 60deg
//
// I think doing atan() may be faster than doing inner product together
// with acos(), so let's adopt atan2f().
const Point3D diffTranslate = translate2 - translate1;
const Point3D diffScale = scale2 - scale1;
const double diffShear = atan(shear2[ShearType::XYSHEAR]) -
atan(shear1[ShearType::XYSHEAR]);
const double diffRotate = 2.0 * (atan2f(rotate2.z, rotate2.w) -
atan2f(rotate1.z, rotate1.w));
// Returns the sum of squares because we will take a square root in
// ComputeTransformListDistance.
return diffTranslate.DotProduct(diffTranslate) +
diffScale.DotProduct(diffScale) +
diffRotate * diffRotate +
diffShear * diffShear;
}
static double
ComputeTransform3DMatrixDistance(const Matrix4x4& aMatrix1,
const Matrix4x4& aMatrix2)
{
Point3D scale1(1, 1, 1);
Point3D translate1;
Point4D perspective1(0, 0, 0, 1);
gfxQuaternion rotate1;
nsStyleTransformMatrix::ShearArray shear1{0.0f, 0.0f, 0.0f};
Decompose3DMatrix(aMatrix1, scale1, shear1, rotate1, translate1,
perspective1);
Point3D scale2(1, 1, 1);
Point3D translate2;
Point4D perspective2(0, 0, 0, 1);
gfxQuaternion rotate2;
nsStyleTransformMatrix::ShearArray shear2{0.0f, 0.0f, 0.0f};
Decompose3DMatrix(aMatrix2, scale2, shear2, rotate2, translate2,
perspective2);
// Note:
// 1. Shear factor is the tangent value of shear angle, so we need to
// call atan() to get the angle.
// 2. We use the same way to get the rotate angle of two quaternion vectors as
// what we do for rotate3d.
const Point3D diffTranslate = translate2 - translate1;
const Point3D diffScale = scale2 - scale1;
const Point3D diffShear(atan(shear2[ShearType::XYSHEAR]) -
atan(shear1[ShearType::XYSHEAR]),
atan(shear2[ShearType::XZSHEAR]) -
atan(shear1[ShearType::XZSHEAR]),
atan(shear2[ShearType::YZSHEAR]) -
atan(shear1[ShearType::YZSHEAR]));
const Point4D diffPerspective = perspective2 - perspective1;
const double dot = clamped(rotate1.DotProduct(rotate2), -1.0, 1.0);
const double diffRotate = 2.0 * acos(dot);
// Returns the sum of squares because we will take a square root in
// ComputeTransformListDistance.
return diffTranslate.DotProduct(diffTranslate) +
diffScale.DotProduct(diffScale) +
diffPerspective.DotProduct(diffPerspective) +
diffShear.DotProduct(diffShear) +
diffRotate * diffRotate;
}
static double
ComputeTransformDistance(nsCSSValue::Array* aArray1,
nsCSSValue::Array* aArray2)
{
MOZ_ASSERT(aArray1, "aArray1 should be non-null.");
MOZ_ASSERT(aArray2, "aArray2 should be non-null.");
// Normalize translate and scale functions to equivalent "translate3d" and
// "scale3d" functions.
RefPtr<nsCSSValue::Array> a1 = ToPrimitive(aArray1),
a2 = ToPrimitive(aArray2);
nsCSSKeyword tfunc = nsStyleTransformMatrix::TransformFunctionOf(a1);
MOZ_ASSERT(nsStyleTransformMatrix::TransformFunctionOf(a2) == tfunc);
double distance = 0.0;
switch (tfunc) {
case eCSSKeyword_translate3d: {
MOZ_ASSERT(a1->Count() == 4, "unexpected count");
MOZ_ASSERT(a2->Count() == 4, "unexpected count");
nsCSSValue x, y, z;
AddTransformTranslate(1.0, a2->Item(1), -1.0, a1->Item(1), x);
AddTransformTranslate(1.0, a2->Item(2), -1.0, a1->Item(2), y);
AddTransformTranslate(1.0, a2->Item(3), -1.0, a1->Item(3), z);
// Drop percent part because we only compute distance by computed values.
double c1 = ExtractCalcValue(x).mLength;
double c2 = ExtractCalcValue(y).mLength;
double c3 = z.GetFloatValue();
distance = c1 * c1 + c2 * c2 + c3 * c3;
break;
}
case eCSSKeyword_scale3d: {
MOZ_ASSERT(a1->Count() == 4, "unexpected count");
MOZ_ASSERT(a2->Count() == 4, "unexpected count");
auto ComputeScaleDiff = [](const nsCSSValue& aValue1,
const nsCSSValue& aValue2) {
float v1 = aValue1.GetFloatValue();
float v2 = aValue2.GetFloatValue();
return EnsureNotNan(v2 - v1);
};
double c1 = ComputeScaleDiff(a1->Item(1), a2->Item(1));
double c2 = ComputeScaleDiff(a1->Item(2), a2->Item(2));
double c3 = ComputeScaleDiff(a1->Item(3), a2->Item(3));
distance = c1 * c1 + c2 * c2 + c3 * c3;
break;
}
case eCSSKeyword_skew: {
MOZ_ASSERT(a1->Count() == 2 || a1->Count() == 3, "unexpected count");
MOZ_ASSERT(a2->Count() == 2 || a2->Count() == 3, "unexpected count");
const nsCSSValue zero(0.0f, eCSSUnit_Radian);
nsCSSValue x, y;
AddCSSValueAngle(1.0, a2->Item(1), -1.0, a1->Item(1), x);
AddCSSValueAngle(1.0, a2->Count() == 3 ? a2->Item(2) : zero,
-1.0, a1->Count() == 3 ? a1->Item(2) : zero,
y);
distance = x.GetAngleValueInRadians() * x.GetAngleValueInRadians() +
y.GetAngleValueInRadians() * y.GetAngleValueInRadians();
break;
}
case eCSSKeyword_skewx:
case eCSSKeyword_skewy:
case eCSSKeyword_rotate:
case eCSSKeyword_rotatex:
case eCSSKeyword_rotatey:
case eCSSKeyword_rotatez: {
MOZ_ASSERT(a1->Count() == 2, "unexpected count");
MOZ_ASSERT(a2->Count() == 2, "unexpected count");
nsCSSValue angle;
AddCSSValueAngle(1.0, a2->Item(1), -1.0, a1->Item(1), angle);
distance = angle.GetAngleValueInRadians() *
angle.GetAngleValueInRadians();
break;
}
case eCSSKeyword_rotate3d: {
MOZ_ASSERT(a1->Count() == 5, "unexpected count");
MOZ_ASSERT(a2->Count() == 5, "unexpected count");
Point3D vector1(a1->Item(1).GetFloatValue(),
a1->Item(2).GetFloatValue(),
a1->Item(3).GetFloatValue());
vector1.Normalize();
Point3D vector2(a2->Item(1).GetFloatValue(),
a2->Item(2).GetFloatValue(),
a2->Item(3).GetFloatValue());
vector2.Normalize();
if (vector1 == vector2) {
// Handle rotate3d with matched (normalized) vectors.
nsCSSValue angle;
AddCSSValueAngle(1.0, a2->Item(4), -1.0, a1->Item(4), angle);
distance = angle.GetAngleValueInRadians() *
angle.GetAngleValueInRadians();
} else {
// Use quaternion vectors to get the angle difference. Both q1 and q2
// are unit vectors, so we can get their angle difference by
// cos(theta/2) = (q1 dot q2) / (|q1| * |q2|) = q1 dot q2.
gfxQuaternion q1(vector1, a1->Item(4).GetAngleValueInRadians());
gfxQuaternion q2(vector2, a2->Item(4).GetAngleValueInRadians());
distance = 2.0 * acos(clamped(q1.DotProduct(q2), -1.0, 1.0));
distance = distance * distance;
}
break;
}
case eCSSKeyword_perspective: {
MOZ_ASSERT(a1->Count() == 2, "unexpected count");
MOZ_ASSERT(a2->Count() == 2, "unexpected count");
// We convert a perspective function into an equivalent matrix3d, and
// then do matrix decomposition to get the distance.
// Why don't we just subtract one perspective depth from the other?
// I think it's better to follow the logic of our interpolation,
// which does linear interpolation between two decomposed perspective
// vectors.
// e.g.
// Do interpolation between perspective(100px) and perspective(1000px).
// 1) Convert them into matrix3d, and then do matrix decomposition:
// perspective vector 1: perspective(0, 0, -1/100, 1);
// perspective vector 2: perspective(0, 0, -1/1000, 1);
// 2) Do linear interpolation between these two vectors.
// Therefore, we use the same rule to get the distance as what we do for
// matrix3d.
auto clampPerspectiveDepth = [](float aDepth) {
// Perspective depth should be positive non-zero value.
return std::max(aDepth, std::numeric_limits<float>::epsilon());
};
Matrix4x4 m1;
m1.Perspective(clampPerspectiveDepth(a1->Item(1).GetFloatValue()));
Matrix4x4 m2;
m2.Perspective(clampPerspectiveDepth(a2->Item(1).GetFloatValue()));
distance = ComputeTransform3DMatrixDistance(m1, m2);
break;
}
case eCSSKeyword_matrix: {
MOZ_ASSERT(a1->Count() == 7, "unexpected count");
MOZ_ASSERT(a2->Count() == 7, "unexpected count");
distance = ComputeTransform2DMatrixDistance(
nsStyleTransformMatrix::CSSValueArrayTo2DMatrix(a1),
nsStyleTransformMatrix::CSSValueArrayTo2DMatrix(a2));
break;
}
case eCSSKeyword_matrix3d: {
MOZ_ASSERT(a1->Count() == 17, "unexpected count");
MOZ_ASSERT(a2->Count() == 17, "unexpected count");
distance = ComputeTransform3DMatrixDistance(
nsStyleTransformMatrix::CSSValueArrayTo3DMatrix(a1),
nsStyleTransformMatrix::CSSValueArrayTo3DMatrix(a2));
break;
}
case eCSSKeyword_interpolatematrix:
case eCSSKeyword_accumulatematrix:
default:
MOZ_ASSERT_UNREACHABLE("Unsupported transform function");
break;
}
return distance;
}
static double
ComputeTransformListDistance(const nsCSSValueList* aList1,
const nsCSSValueList* aList2)
{
MOZ_ASSERT(aList1, "aList1 should be non-null.");
MOZ_ASSERT(aList2, "aList2 should be non-null.");
double distance = 0.0;
do {
distance += ComputeTransformDistance(aList1->mValue.GetArrayValue(),
aList2->mValue.GetArrayValue());
aList1 = aList1->mNext;
aList2 = aList2->mNext;
MOZ_ASSERT(!aList1 == !aList2,
"aList1 and aList2 should have the same length.");
} while (aList1);
return sqrt(distance);
}
static double
ComputeMismatchedTransfromListDistance(const nsCSSValueList* aList1,
const nsCSSValueList* aList2,
nsStyleContext* aStyleContext)
{
// We need nsStyleContext and nsPresContext to compute calc() values while
// processing the translate part of transforms.
if (!aStyleContext) {
return 0.0;
}
RuleNodeCacheConditions dontCare;
bool dontCareBool;
nsStyleTransformMatrix::TransformReferenceBox emptyRefBox;
Matrix4x4 m1 = nsStyleTransformMatrix::ReadTransforms(
aList1,
aStyleContext,
aStyleContext->PresContext(),
dontCare,
emptyRefBox,
nsPresContext::AppUnitsPerCSSPixel(),
&dontCareBool);
Matrix4x4 m2 = nsStyleTransformMatrix::ReadTransforms(
aList2,
aStyleContext,
aStyleContext->PresContext(),
dontCare,
emptyRefBox,
nsPresContext::AppUnitsPerCSSPixel(),
&dontCareBool);
return sqrt(ComputeTransform3DMatrixDistance(m1, m2));
}
bool
StyleAnimationValue::ComputeDistance(nsCSSPropertyID aProperty,
const StyleAnimationValue& aStartValue,
const StyleAnimationValue& aEndValue,
nsStyleContext* aStyleContext,
double& aDistance)
{
Unit commonUnit =
GetCommonUnit(aProperty, aStartValue.GetUnit(), aEndValue.GetUnit());
switch (commonUnit) {
case eUnit_Null:
case eUnit_Auto:
case eUnit_None:
case eUnit_Normal:
case eUnit_UnparsedString:
case eUnit_URL:
case eUnit_DiscreteCSSValue:
return false;
case eUnit_Enumerated:
switch (aProperty) {
case eCSSProperty_font_stretch: {
// just like eUnit_Integer.
int32_t startInt = aStartValue.GetIntValue();
int32_t endInt = aEndValue.GetIntValue();
aDistance = Abs(endInt - startInt);
return true;
}
default:
return false;
}
case eUnit_Visibility: {
int32_t startEnum = aStartValue.GetIntValue();
int32_t endEnum = aEndValue.GetIntValue();
if (startEnum == endEnum) {
aDistance = 0;
return true;
}
if ((startEnum == NS_STYLE_VISIBILITY_VISIBLE) ==
(endEnum == NS_STYLE_VISIBILITY_VISIBLE)) {
return false;
}
aDistance = 1;
return true;
}
case eUnit_Integer: {
int32_t startInt = aStartValue.GetIntValue();
int32_t endInt = aEndValue.GetIntValue();
aDistance = Abs(double(endInt) - double(startInt));
return true;
}
case eUnit_Coord: {
nscoord startCoord = aStartValue.GetCoordValue();
nscoord endCoord = aEndValue.GetCoordValue();
aDistance = Abs(double(endCoord) - double(startCoord));
return true;
}
case eUnit_Percent: {
float startPct = aStartValue.GetPercentValue();
float endPct = aEndValue.GetPercentValue();
aDistance = Abs(double(endPct) - double(startPct));
return true;
}
case eUnit_Float: {
float startFloat = aStartValue.GetFloatValue();
float endFloat = aEndValue.GetFloatValue();
aDistance = Abs(double(endFloat) - double(startFloat));
return true;
}
case eUnit_Color: {
aDistance = ComputeColorDistance(ExtractColor(aStartValue),
ExtractColor(aEndValue));
return true;
}
case eUnit_CurrentColor: {
aDistance = 0;
return true;
}
case eUnit_ComplexColor: {
ComplexColorData color1 = ExtractComplexColor(aStartValue);
ComplexColorData color2 = ExtractComplexColor(aEndValue);
// Common case is interpolating between a color and a currentcolor
if (color1.IsNumericColor() && color2.IsCurrentColor()) {
double dist = ComputeColorDistance(color1.mColor, NS_RGBA(0, 0, 0, 0));
aDistance = sqrt(dist * dist + 1);
return true;
}
if (color1.IsCurrentColor() && color2.IsNumericColor()) {
double dist = ComputeColorDistance(NS_RGBA(0, 0, 0, 0), color2.mColor);
aDistance = sqrt(dist * dist + 1);
return true;
}
// If we ever reach here, we may want to use the code in
// bug 1299741 comment 79 to compute it.
MOZ_ASSERT_UNREACHABLE("We shouldn't get here as we only call "
"ComputeDistance on pre-interpolation values");
aDistance = 0.0;
return true;
}
case eUnit_Calc: {
PixelCalcValue v1 = ExtractCalcValue(aStartValue);
PixelCalcValue v2 = ExtractCalcValue(aEndValue);
float difflen = v2.mLength - v1.mLength;
float diffpct = v2.mPercent - v1.mPercent;
aDistance = sqrt(difflen * difflen + diffpct * diffpct);
return true;
}
case eUnit_ObjectPosition: {
const nsCSSValue* position1 = aStartValue.GetCSSValueValue();
const nsCSSValue* position2 = aEndValue.GetCSSValueValue();
double squareDistance =
CalcPositionSquareDistance(*position1,
*position2);
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_CSSValuePair: {
const nsCSSValuePair *pair1 = aStartValue.GetCSSValuePairValue();
const nsCSSValuePair *pair2 = aEndValue.GetCSSValuePairValue();
nsCSSUnit unit[2];
unit[0] = GetCommonUnit(aProperty, pair1->mXValue.GetUnit(),
pair2->mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, pair1->mYValue.GetUnit(),
pair2->mYValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[0] == eCSSUnit_URL || unit[0] == eCSSUnit_Enumerated) {
return false;
}
double squareDistance = 0.0;
static nsCSSValue nsCSSValuePair::* const pairValues[2] = {
&nsCSSValuePair::mXValue, &nsCSSValuePair::mYValue
};
for (uint32_t i = 0; i < 2; ++i) {
nsCSSValue nsCSSValuePair::*member = pairValues[i];
double diffsquared;
switch (unit[i]) {
case eCSSUnit_Pixel: {
float diff = (pair1->*member).GetFloatValue() -
(pair2->*member).GetFloatValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Percent: {
float diff = (pair1->*member).GetPercentValue() -
(pair2->*member).GetPercentValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Calc: {
PixelCalcValue v1 = ExtractCalcValue(pair1->*member);
PixelCalcValue v2 = ExtractCalcValue(pair2->*member);
float difflen = v2.mLength - v1.mLength;
float diffpct = v2.mPercent - v1.mPercent;
diffsquared = difflen * difflen + diffpct * diffpct;
break;
}
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
squareDistance += diffsquared;
}
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_CSSValueTriplet: {
const nsCSSValueTriplet *triplet1 = aStartValue.GetCSSValueTripletValue();
const nsCSSValueTriplet *triplet2 = aEndValue.GetCSSValueTripletValue();
nsCSSUnit unit[3];
unit[0] = GetCommonUnit(aProperty, triplet1->mXValue.GetUnit(),
triplet2->mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, triplet1->mYValue.GetUnit(),
triplet2->mYValue.GetUnit());
unit[2] = GetCommonUnit(aProperty, triplet1->mZValue.GetUnit(),
triplet2->mZValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[2] == eCSSUnit_Null) {
return false;
}
double squareDistance = 0.0;
static nsCSSValue nsCSSValueTriplet::* const pairValues[3] = {
&nsCSSValueTriplet::mXValue, &nsCSSValueTriplet::mYValue, &nsCSSValueTriplet::mZValue
};
for (uint32_t i = 0; i < 3; ++i) {
nsCSSValue nsCSSValueTriplet::*member = pairValues[i];
double diffsquared;
switch (unit[i]) {
case eCSSUnit_Pixel: {
float diff = (triplet1->*member).GetFloatValue() -
(triplet2->*member).GetFloatValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Percent: {
float diff = (triplet1->*member).GetPercentValue() -
(triplet2->*member).GetPercentValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Calc: {
PixelCalcValue v1 = ExtractCalcValue(triplet1->*member);
PixelCalcValue v2 = ExtractCalcValue(triplet2->*member);
float difflen = v2.mLength - v1.mLength;
float diffpct = v2.mPercent - v1.mPercent;
diffsquared = difflen * difflen + diffpct * diffpct;
break;
}
case eCSSUnit_Null:
diffsquared = 0;
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
squareDistance += diffsquared;
}
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_CSSRect: {
const nsCSSRect *rect1 = aStartValue.GetCSSRectValue();
const nsCSSRect *rect2 = aEndValue.GetCSSRectValue();
if (rect1->mTop.GetUnit() != rect2->mTop.GetUnit() ||
rect1->mRight.GetUnit() != rect2->mRight.GetUnit() ||
rect1->mBottom.GetUnit() != rect2->mBottom.GetUnit() ||
rect1->mLeft.GetUnit() != rect2->mLeft.GetUnit()) {
// At least until we have calc()
return false;
}
double squareDistance = 0.0;
for (uint32_t i = 0; i < ArrayLength(nsCSSRect::sides); ++i) {
nsCSSValue nsCSSRect::*member = nsCSSRect::sides[i];
MOZ_ASSERT((rect1->*member).GetUnit() == (rect2->*member).GetUnit(),
"should have returned above");
double diff;
switch ((rect1->*member).GetUnit()) {
case eCSSUnit_Pixel:
diff = (rect1->*member).GetFloatValue() -
(rect2->*member).GetFloatValue();
break;
case eCSSUnit_Auto:
diff = 0;
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
squareDistance += diff * diff;
}
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_Dasharray: {
// NOTE: This produces results on substantially different scales
// for length values and percentage values, which might even be
// mixed in the same property value. This means the result isn't
// particularly useful for paced animation.
// Call AddWeighted to make us lists of the same length.
StyleAnimationValue normValue1, normValue2;
if (!AddWeighted(aProperty, 1.0, aStartValue, 0.0, aEndValue,
normValue1) ||
!AddWeighted(aProperty, 0.0, aStartValue, 1.0, aEndValue,
normValue2)) {
return false;
}
double squareDistance = 0.0;
const nsCSSValueList *list1 = normValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = normValue2.GetCSSValueListValue();
MOZ_ASSERT(!list1 == !list2, "lists should be same length");
while (list1) {
const nsCSSValue &val1 = list1->mValue;
const nsCSSValue &val2 = list2->mValue;
MOZ_ASSERT(val1.GetUnit() == val2.GetUnit(),
"unit match should be assured by AddWeighted");
double diff;
switch (val1.GetUnit()) {
case eCSSUnit_Percent:
diff = val1.GetPercentValue() - val2.GetPercentValue();
break;
case eCSSUnit_Number:
diff = val1.GetFloatValue() - val2.GetFloatValue();
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
squareDistance += diff * diff;
list1 = list1->mNext;
list2 = list2->mNext;
MOZ_ASSERT(!list1 == !list2, "lists should be same length");
}
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_Shadow: {
// Call AddWeighted to make us lists of the same length.
StyleAnimationValue normValue1, normValue2;
if (!AddWeighted(aProperty, 1.0, aStartValue, 0.0, aEndValue,
normValue1) ||
!AddWeighted(aProperty, 0.0, aStartValue, 1.0, aEndValue,
normValue2)) {
return false;
}
const nsCSSValueList* shadow1 = normValue1.GetCSSValueListValue();
const nsCSSValueList* shadow2 = normValue2.GetCSSValueListValue();
aDistance = 0.0;
MOZ_ASSERT(!shadow1 == !shadow2, "lists should be same length");
while (shadow1) {
double squareDistance = 0.0;
if (!ComputeSingleShadowSquareDistance(shadow1, shadow2,
squareDistance)) {
NS_ERROR("Unexpected ComputeSingleShadowSquareDistance failure; "
"why didn't we fail earlier, in AddWeighted calls above?");
}
aDistance += squareDistance; // cumulative distance^2; sqrt()'d below.
shadow1 = shadow1->mNext;
shadow2 = shadow2->mNext;
MOZ_ASSERT(!shadow1 == !shadow2, "lists should be same length");
}
aDistance = sqrt(aDistance);
return true;
}
case eUnit_Shape:
return ComputeShapeDistance(aProperty,
aStartValue.GetCSSValueArrayValue(),
aEndValue.GetCSSValueArrayValue(),
aDistance);
case eUnit_Filter:
return ComputeFilterListDistance(aStartValue.GetCSSValueListValue(),
aEndValue.GetCSSValueListValue(),
aDistance);
case eUnit_Transform: {
// FIXME: We don't have an official spec to define the distance of
// two transform lists, but paced spacing (defined in Web Animations API)
// needs this, so we implement this according to the concept of the
// interpolation of two transform lists.
// Issue: https://www.w3.org/TR/web-animations-1/#issue-789f9fd1
const nsCSSValueList* list1 =
aStartValue.GetCSSValueSharedListValue()->mHead;
const nsCSSValueList* list2 =
aEndValue.GetCSSValueSharedListValue()->mHead;
MOZ_ASSERT(list1);
MOZ_ASSERT(list2);
if (list1->mValue.GetUnit() == eCSSUnit_None &&
list2->mValue.GetUnit() == eCSSUnit_None) {
// Both none, nothing happens.
aDistance = 0.0;
} else if (list1->mValue.GetUnit() == eCSSUnit_None) {
nsAutoPtr<nsCSSValueList> none(AddTransformLists(0, list2, 0, list2));
aDistance = ComputeTransformListDistance(none, list2);
} else if (list2->mValue.GetUnit() == eCSSUnit_None) {
nsAutoPtr<nsCSSValueList> none(AddTransformLists(0, list1, 0, list1));
aDistance = ComputeTransformListDistance(list1, none);
} else if (TransformFunctionListsMatch(list1, list2)) {
aDistance = ComputeTransformListDistance(list1, list2);
} else {
aDistance =
ComputeMismatchedTransfromListDistance(list1, list2, aStyleContext);
}
return true;
}
case eUnit_BackgroundPositionCoord: {
const nsCSSValueList *position1 = aStartValue.GetCSSValueListValue();
const nsCSSValueList *position2 = aEndValue.GetCSSValueListValue();
double squareDistance = 0.0;
MOZ_ASSERT(!position1 == !position2, "lists should be same length");
while (position1 && position2) {
squareDistance += CalcPositionCoordSquareDistance(position1->mValue,
position2->mValue);
position1 = position1->mNext;
position2 = position2->mNext;
}
// fail if lists differ in length.
if (position1 || position2) {
return false;
}
aDistance = sqrt(squareDistance);
return true;
}
case eUnit_CSSValuePairList: {
const nsCSSValuePairList *list1 = aStartValue.GetCSSValuePairListValue();
const nsCSSValuePairList *list2 = aEndValue.GetCSSValuePairListValue();
double squareDistance = 0.0;
do {
static nsCSSValue nsCSSValuePairList::* const pairListValues[] = {
&nsCSSValuePairList::mXValue,
&nsCSSValuePairList::mYValue,
};
for (uint32_t i = 0; i < ArrayLength(pairListValues); ++i) {
const nsCSSValue &v1 = list1->*(pairListValues[i]);
const nsCSSValue &v2 = list2->*(pairListValues[i]);
nsCSSUnit unit =
GetCommonUnit(aProperty, v1.GetUnit(), v2.GetUnit());
if (unit == eCSSUnit_Null) {
return false;
}
double diffsquared = 0.0;
switch (unit) {
case eCSSUnit_Number:
case eCSSUnit_Pixel: {
float diff = v1.GetFloatValue() - v2.GetFloatValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Percent: {
float diff = v1.GetPercentValue() - v2.GetPercentValue();
diffsquared = diff * diff;
break;
}
case eCSSUnit_Calc: {
PixelCalcValue val1 = ExtractCalcValue(v1);
PixelCalcValue val2 = ExtractCalcValue(v2);
float difflen = val2.mLength - val1.mLength;
float diffpct = val2.mPercent - val1.mPercent;
diffsquared = difflen * difflen + diffpct * diffpct;
break;
}
default:
if (v1 != v2) {
return false;
}
break;
}
squareDistance += diffsquared;
}
list1 = list1->mNext;
list2 = list2->mNext;
} while (list1 && list2);
if (list1 || list2) {
// We can't interpolate lists of different lengths.
return false;
}
aDistance = sqrt(squareDistance);
return true;
}
}
MOZ_ASSERT(false, "Can't compute distance using the given common unit");
return false;
}
static inline void
AddCSSValueNumber(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult, uint32_t aValueRestrictions = 0)
{
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Number, "unexpected unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Number, "unexpected unit");
aResult.SetFloatValue(RestrictValue(aValueRestrictions,
aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue()),
eCSSUnit_Number);
}
static inline float
GetNumberOrPercent(const nsCSSValue &aValue)
{
nsCSSUnit unit = aValue.GetUnit();
MOZ_ASSERT(unit == eCSSUnit_Number || unit == eCSSUnit_Percent,
"unexpected unit");
return (unit == eCSSUnit_Number) ?
aValue.GetFloatValue() : aValue.GetPercentValue();
}
static inline void
AddCSSValuePercentNumber(const uint32_t aValueRestrictions,
double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult, float aInitialVal)
{
float n1 = GetNumberOrPercent(aValue1);
float n2 = GetNumberOrPercent(aValue2);
// Rather than interpolating aValue1 and aValue2 directly, we
// interpolate their *distances from aInitialVal* (the initial value,
// which is either 1 or 0 for "filter" functions). This matters in
// cases where aInitialVal is nonzero and the coefficients don't add
// up to 1. For example, if initialVal is 1, aCoeff1 is 0.5, and
// aCoeff2 is 0, then we'll return the value halfway between 1 and
// aValue1, rather than the value halfway between 0 and aValue1.
// Note that we do something similar in AddTransformScale().
float result = (n1 - aInitialVal) * aCoeff1 + (n2 - aInitialVal) * aCoeff2;
aResult.SetFloatValue(RestrictValue(aValueRestrictions, result + aInitialVal),
eCSSUnit_Number);
}
// Multiplies |aValue| color by |aDilutionRation|.
static nscolor
DiluteColor(const RGBAColorData& aValue, double aDilutionRatio)
{
MOZ_ASSERT(aDilutionRatio >= 0.0 && aDilutionRatio <= 1.0,
"Dilution ratio should be in [0, 1]");
float resultA = aValue.mA * aDilutionRatio;
return resultA <= 0.0 ? NS_RGBA(0, 0, 0, 0)
: aValue.WithAlpha(resultA).ToColor();
}
// Clamped AddWeightedColors.
static nscolor
AddWeightedColorsAndClamp(double aCoeff1, const RGBAColorData& aValue1,
double aCoeff2, const RGBAColorData& aValue2)
{
// We are using AddWeighted() with a zero aCoeff2 for colors to
// pretend AddWeighted() against transparent color, i.e. rgba(0, 0, 0, 0).
// But unpremultiplication in AddWeightedColors() does not work well
// for such cases, so we use another function named DiluteColor() which
// has a similar logic to AddWeightedColors().
return aCoeff2 == 0.0
? DiluteColor(aValue1, aCoeff1)
: AddWeightedColors(aCoeff1, aValue1, aCoeff2, aValue2).ToColor();
}
void
AppendToCSSValueList(UniquePtr<nsCSSValueList>& aHead,
UniquePtr<nsCSSValueList>&& aValueToAppend,
nsCSSValueList** aTail)
{
MOZ_ASSERT(!aHead == !*aTail,
"Can't have head w/o tail, & vice versa");
if (!aHead) {
aHead = Move(aValueToAppend);
*aTail = aHead.get();
} else {
(*aTail) = (*aTail)->mNext = aValueToAppend.release();
}
}
void
AppendToCSSValuePairList(UniquePtr<nsCSSValuePairList>& aHead,
UniquePtr<nsCSSValuePairList>&& aValueToAppend,
nsCSSValuePairList** aTail)
{
MOZ_ASSERT(!aHead == !*aTail,
"Can't have head w/o tail, & vice versa");
if (!aHead) {
aHead = Move(aValueToAppend);
*aTail = aHead.get();
} else {
(*aTail) = (*aTail)->mNext = aValueToAppend.release();
}
}
static UniquePtr<nsCSSValueList>
AddWeightedShadowItems(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
ColorAdditionType aColorAdditionType)
{
// X, Y, Radius, Spread, Color, Inset
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Array,
"wrong unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Array,
"wrong unit");
nsCSSValue::Array *array1 = aValue1.GetArrayValue();
nsCSSValue::Array *array2 = aValue2.GetArrayValue();
RefPtr<nsCSSValue::Array> resultArray = nsCSSValue::Array::Create(6);
for (size_t i = 0; i < 4; ++i) {
AddCSSValuePixel(aCoeff1, array1->Item(i), aCoeff2, array2->Item(i),
resultArray->Item(i),
// blur radius must be nonnegative
(i == 2) ? CSS_PROPERTY_VALUE_NONNEGATIVE : 0);
}
const nsCSSValue& colorValue1 = array1->Item(4);
const nsCSSValue& colorValue2 = array2->Item(4);
const nsCSSValue& inset1 = array1->Item(5);
const nsCSSValue& inset2 = array2->Item(5);
if ((colorValue1.GetUnit() != colorValue2.GetUnit() &&
(!colorValue1.IsNumericColorUnit() ||
!colorValue2.IsNumericColorUnit())) ||
inset1.GetUnit() != inset2.GetUnit()) {
// We don't know how to animate between color and no-color, or
// between inset and not-inset.
// NOTE: In case when both colors' units are eCSSUnit_Null, that means
// neither color value was specified, so we can interpolate.
return nullptr;
}
if (colorValue1.GetUnit() != eCSSUnit_Null) {
RGBAColorData color1 = ExtractColor(colorValue1);
RGBAColorData color2 = ExtractColor(colorValue2);
if (aColorAdditionType == ColorAdditionType::Clamped) {
resultArray->Item(4).SetColorValue(
AddWeightedColorsAndClamp(aCoeff1, color1, aCoeff2, color2));
} else {
resultArray->Item(4).SetRGBAColorValue(
AddWeightedColors(aCoeff1, color1, aCoeff2, color2));
}
}
MOZ_ASSERT(inset1 == inset2, "should match");
resultArray->Item(5) = inset1;
auto resultItem = MakeUnique<nsCSSValueList>();
resultItem->mValue.SetArrayValue(resultArray, eCSSUnit_Array);
return resultItem;
}
static void
AddTransformScale(double aCoeff1, const nsCSSValue &aValue1,
double aCoeff2, const nsCSSValue &aValue2,
nsCSSValue &aResult)
{
// Handle scale, and the two matrix components where identity is 1, by
// subtracting 1, multiplying by the coefficients, and then adding 1
// back. This gets the right AddWeighted behavior and gets us the
// interpolation-against-identity behavior for free.
MOZ_ASSERT(aValue1.GetUnit() == eCSSUnit_Number, "unexpected unit");
MOZ_ASSERT(aValue2.GetUnit() == eCSSUnit_Number, "unexpected unit");
float v1 = aValue1.GetFloatValue() - 1.0f,
v2 = aValue2.GetFloatValue() - 1.0f;
float result = v1 * aCoeff1 + v2 * aCoeff2;
aResult.SetFloatValue(EnsureNotNan(result + 1.0f), eCSSUnit_Number);
}
/* static */ already_AddRefed<nsCSSValue::Array>
StyleAnimationValue::AppendTransformFunction(nsCSSKeyword aTransformFunction,
nsCSSValueList**& aListTail)
{
RefPtr<nsCSSValue::Array> arr = AppendFunction(aTransformFunction);
nsCSSValueList *item = new nsCSSValueList;
item->mValue.SetArrayValue(arr, eCSSUnit_Function);
*aListTail = item;
aListTail = &item->mNext;
return arr.forget();
}
static nsCSSValueList*
AddDifferentTransformLists(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
nsCSSKeyword aOperatorType)
{
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
RefPtr<nsCSSValue::Array> arr;
arr =
StyleAnimationValue::AppendTransformFunction(aOperatorType,
resultTail);
// FIXME: We should change the other transform code to also only
// take a single progress value, as having values that don't
// sum to 1 doesn't make sense for these.
if (aList1 == aList2) {
arr->Item(1).Reset();
// For accumulation, we need to increase accumulation count for |aList1|.
if (aOperatorType == eCSSKeyword_accumulatematrix) {
aCoeff2 += 1.0;
}
} else {
aList1->CloneInto(arr->Item(1).SetListValue());
}
aList2->CloneInto(arr->Item(2).SetListValue());
arr->Item(3).SetPercentValue(aCoeff2);
return result.forget();
}
static UniquePtr<nsCSSValueList>
AddWeightedFilterFunctionImpl(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
ColorAdditionType aColorAdditionType)
{
// AddWeightedFilterFunction should be our only caller, and it should ensure
// that both args are non-null.
MOZ_ASSERT(aList1, "expected filter list");
MOZ_ASSERT(aList2, "expected filter list");
MOZ_ASSERT(aList1->mValue.GetUnit() == eCSSUnit_Function,
"expected function");
MOZ_ASSERT(aList2->mValue.GetUnit() == eCSSUnit_Function,
"expected function");
RefPtr<nsCSSValue::Array> a1 = aList1->mValue.GetArrayValue(),
a2 = aList2->mValue.GetArrayValue();
nsCSSKeyword filterFunction = a1->Item(0).GetKeywordValue();
if (filterFunction != a2->Item(0).GetKeywordValue()) {
return nullptr; // Can't add two filters of different types.
}
auto resultList = MakeUnique<nsCSSValueList>();
nsCSSValue::Array* result =
resultList->mValue.InitFunction(filterFunction, 1);
// "hue-rotate" is the only filter-function that accepts negative values, and
// we don't use this "restrictions" variable in its clause below.
const uint32_t restrictions = CSS_PROPERTY_VALUE_NONNEGATIVE;
const nsCSSValue& funcArg1 = a1->Item(1);
const nsCSSValue& funcArg2 = a2->Item(1);
nsCSSValue& resultArg = result->Item(1);
float initialVal = 1.0f;
switch (filterFunction) {
case eCSSKeyword_blur: {
nsCSSUnit unit;
if (funcArg1.GetUnit() == funcArg2.GetUnit()) {
unit = funcArg1.GetUnit();
} else {
// If units differ, we'll just combine them with calc().
unit = eCSSUnit_Calc;
}
if (!AddCSSValuePixelPercentCalc(restrictions,
unit,
aCoeff1, funcArg1,
aCoeff2, funcArg2,
resultArg)) {
return nullptr;
}
break;
}
case eCSSKeyword_grayscale:
case eCSSKeyword_invert:
case eCSSKeyword_sepia:
initialVal = 0.0f;
MOZ_FALLTHROUGH;
case eCSSKeyword_brightness:
case eCSSKeyword_contrast:
case eCSSKeyword_opacity:
case eCSSKeyword_saturate:
AddCSSValuePercentNumber(restrictions,
aCoeff1, funcArg1,
aCoeff2, funcArg2,
resultArg,
initialVal);
break;
case eCSSKeyword_hue_rotate:
AddCSSValueAngle(aCoeff1, funcArg1,
aCoeff2, funcArg2,
resultArg);
break;
case eCSSKeyword_drop_shadow: {
MOZ_ASSERT(!funcArg1.GetListValue()->mNext &&
!funcArg2.GetListValue()->mNext,
"drop-shadow filter func doesn't support lists");
UniquePtr<nsCSSValueList> shadowValue =
AddWeightedShadowItems(aCoeff1,
funcArg1.GetListValue()->mValue,
aCoeff2,
funcArg2.GetListValue()->mValue,
aColorAdditionType);
if (!shadowValue) {
return nullptr;
}
resultArg.AdoptListValue(Move(shadowValue));
break;
}
default:
MOZ_ASSERT(false, "unknown filter function");
return nullptr;
}
return resultList;
}
static UniquePtr<nsCSSValueList>
AddWeightedFilterFunction(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
ColorAdditionType aColorAdditionType)
{
MOZ_ASSERT(aList1 || aList2,
"one function list item must not be null");
// Note that one of our arguments could be null, indicating that
// it's the initial value. Rather than adding special null-handling
// logic, we just check for null values and replace them with
// 0 * the other value. That way, AddWeightedFilterFunctionImpl can assume
// its args are non-null.
if (!aList1) {
return AddWeightedFilterFunctionImpl(aCoeff2, aList2, 0, aList2,
aColorAdditionType);
}
if (!aList2) {
return AddWeightedFilterFunctionImpl(aCoeff1, aList1, 0, aList1,
aColorAdditionType);
}
return AddWeightedFilterFunctionImpl(aCoeff1, aList1, aCoeff2, aList2,
aColorAdditionType);
}
static inline uint32_t
ShapeArgumentCount(nsCSSKeyword aShapeFunction)
{
switch (aShapeFunction) {
case eCSSKeyword_circle:
return 2; // radius and center point
case eCSSKeyword_polygon:
return 2; // fill rule and a list of points
case eCSSKeyword_ellipse:
return 3; // two radii and center point
case eCSSKeyword_inset:
return 5; // four edge offsets and a list of corner radii
default:
MOZ_ASSERT_UNREACHABLE("Unknown shape type");
return 0;
}
}
static void
AddPositions(double aCoeff1, const nsCSSValue& aPos1,
double aCoeff2, const nsCSSValue& aPos2,
nsCSSValue& aResultPos)
{
MOZ_ASSERT(aPos1.GetUnit() == eCSSUnit_Array &&
aPos2.GetUnit() == eCSSUnit_Array,
"Args should be CSS <position>s, encoded as arrays");
const nsCSSValue::Array* posArray1 = aPos1.GetArrayValue();
const nsCSSValue::Array* posArray2 = aPos2.GetArrayValue();
MOZ_ASSERT(posArray1->Count() == 4 && posArray2->Count() == 4,
"CSSParserImpl::ParsePositionValue creates an array of length "
"4 - how did we get here?");
nsCSSValue::Array* resultPosArray = nsCSSValue::Array::Create(4);
aResultPos.SetArrayValue(resultPosArray, eCSSUnit_Array);
// Only iterate over elements 1 and 3. The <position> is 'uncomputed' to
// only those elements. See also the comment in SetPositionValue.
for (size_t i = 1; i < 4; i += 2) {
const nsCSSValue& v1 = posArray1->Item(i);
const nsCSSValue& v2 = posArray2->Item(i);
nsCSSValue& vr = resultPosArray->Item(i);
AddCSSValueCanonicalCalc(aCoeff1, v1,
aCoeff2, v2, vr);
}
}
static Maybe<nsCSSValuePair>
AddCSSValuePair(nsCSSPropertyID aProperty, uint32_t aRestrictions,
double aCoeff1, const nsCSSValuePair* aPair1,
double aCoeff2, const nsCSSValuePair* aPair2)
{
MOZ_ASSERT(aPair1, "expected pair");
MOZ_ASSERT(aPair2, "expected pair");
Maybe<nsCSSValuePair> result;
nsCSSUnit unit[2];
unit[0] = GetCommonUnit(aProperty, aPair1->mXValue.GetUnit(),
aPair2->mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, aPair1->mYValue.GetUnit(),
aPair2->mYValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[0] == eCSSUnit_URL || unit[0] == eCSSUnit_Enumerated) {
return result; // Nothing() (returning |result| for RVO)
}
result.emplace();
static nsCSSValue nsCSSValuePair::* const pairValues[2] = {
&nsCSSValuePair::mXValue, &nsCSSValuePair::mYValue
};
for (uint32_t i = 0; i < 2; ++i) {
nsCSSValue nsCSSValuePair::*member = pairValues[i];
if (!AddCSSValuePixelPercentCalc(aRestrictions, unit[i],
aCoeff1, aPair1->*member,
aCoeff2, aPair2->*member,
result.ref().*member) ) {
MOZ_ASSERT(false, "unexpected unit");
result.reset();
return result; // Nothing() (returning |result| for RVO)
}
}
return result;
}
static UniquePtr<nsCSSValuePairList>
AddCSSValuePairList(nsCSSPropertyID aProperty,
double aCoeff1, const nsCSSValuePairList* aList1,
double aCoeff2, const nsCSSValuePairList* aList2)
{
MOZ_ASSERT(aList1, "Can't add a null list");
MOZ_ASSERT(aList2, "Can't add a null list");
auto result = MakeUnique<nsCSSValuePairList>();
nsCSSValuePairList* resultPtr = result.get();
do {
static nsCSSValue nsCSSValuePairList::* const pairListValues[] = {
&nsCSSValuePairList::mXValue,
&nsCSSValuePairList::mYValue,
};
uint32_t restrictions = nsCSSProps::ValueRestrictions(aProperty);
for (uint32_t i = 0; i < ArrayLength(pairListValues); ++i) {
const nsCSSValue& v1 = aList1->*(pairListValues[i]);
const nsCSSValue& v2 = aList2->*(pairListValues[i]);
nsCSSValue& vr = resultPtr->*(pairListValues[i]);
nsCSSUnit unit =
GetCommonUnit(aProperty, v1.GetUnit(), v2.GetUnit());
if (unit == eCSSUnit_Null) {
return nullptr;
}
if (unit == eCSSUnit_Number) {
AddCSSValueNumber(aCoeff1, v1,
aCoeff2, v2,
vr, restrictions);
} else if (!AddCSSValuePixelPercentCalc(restrictions, unit,
aCoeff1, v1,
aCoeff2, v2, vr)) {
if (v1 != v2) {
return nullptr;
}
vr = v1;
}
}
aList1 = aList1->mNext;
aList2 = aList2->mNext;
if (!aList1 || !aList2) {
break;
}
resultPtr->mNext = new nsCSSValuePairList;
resultPtr = resultPtr->mNext;
} while (aList1 && aList2);
if (aList1 || aList2) {
return nullptr; // We can't interpolate lists of different lengths
}
return result;
}
static already_AddRefed<nsCSSValue::Array>
AddShapeFunction(nsCSSPropertyID aProperty,
double aCoeff1, const nsCSSValue::Array* aArray1,
double aCoeff2, const nsCSSValue::Array* aArray2,
Restrictions aRestriction)
{
MOZ_ASSERT(aArray1 && aArray1->Count() == 2, "expected shape function");
MOZ_ASSERT(aArray2 && aArray2->Count() == 2, "expected shape function");
MOZ_ASSERT(aArray1->Item(0).GetUnit() == eCSSUnit_Function,
"expected function");
MOZ_ASSERT(aArray2->Item(0).GetUnit() == eCSSUnit_Function,
"expected function");
MOZ_ASSERT(aArray1->Item(1).GetUnit() == eCSSUnit_Enumerated,
"expected geometry-box");
MOZ_ASSERT(aArray2->Item(1).GetUnit() == eCSSUnit_Enumerated,
"expected geometry-box");
if (aArray1->Item(1).GetIntValue() != aArray2->Item(1).GetIntValue()) {
return nullptr; // Both shapes must use the same reference box.
}
const nsCSSValue::Array* func1 = aArray1->Item(0).GetArrayValue();
const nsCSSValue::Array* func2 = aArray2->Item(0).GetArrayValue();
nsCSSKeyword shapeFuncName = func1->Item(0).GetKeywordValue();
if (shapeFuncName != func2->Item(0).GetKeywordValue()) {
return nullptr; // Can't add two shapes of different types.
}
RefPtr<nsCSSValue::Array> result = nsCSSValue::Array::Create(2);
nsCSSValue::Array* resultFuncArgs =
result->Item(0).InitFunction(shapeFuncName,
ShapeArgumentCount(shapeFuncName));
switch (shapeFuncName) {
case eCSSKeyword_ellipse:
// Add ellipses' |ry| values (but fail if we encounter an enum):
if (!AddCSSValuePixelPercentCalc(aRestriction == Restrictions::Enable
? CSS_PROPERTY_VALUE_NONNEGATIVE
: 0,
GetCommonUnit(aProperty,
func1->Item(2).GetUnit(),
func2->Item(2).GetUnit()),
aCoeff1, func1->Item(2),
aCoeff2, func2->Item(2),
resultFuncArgs->Item(2))) {
return nullptr;
}
MOZ_FALLTHROUGH; // to handle rx and center point
case eCSSKeyword_circle: {
// Add circles' |r| (or ellipses' |rx|) values:
if (!AddCSSValuePixelPercentCalc(aRestriction == Restrictions::Enable
? CSS_PROPERTY_VALUE_NONNEGATIVE
: 0,
GetCommonUnit(aProperty,
func1->Item(1).GetUnit(),
func2->Item(1).GetUnit()),
aCoeff1, func1->Item(1),
aCoeff2, func2->Item(1),
resultFuncArgs->Item(1))) {
return nullptr;
}
// Add center points (defined as a <position>).
size_t posIndex = shapeFuncName == eCSSKeyword_circle ? 2 : 3;
AddPositions(aCoeff1, func1->Item(posIndex),
aCoeff2, func2->Item(posIndex),
resultFuncArgs->Item(posIndex));
break;
}
case eCSSKeyword_polygon: {
// Add polygons' corresponding points (if the fill rule matches):
int32_t fillRule = func1->Item(1).GetIntValue();
if (fillRule != func2->Item(1).GetIntValue()) {
return nullptr; // can't interpolate between different fill rules
}
resultFuncArgs->Item(1).SetIntValue(fillRule, eCSSUnit_Enumerated);
const nsCSSValuePairList* points1 = func1->Item(2).GetPairListValue();
const nsCSSValuePairList* points2 = func2->Item(2).GetPairListValue();
UniquePtr<nsCSSValuePairList> resultPoints =
AddCSSValuePairList(aProperty, aCoeff1, points1, aCoeff2, points2);
if (!resultPoints) {
return nullptr;
}
resultFuncArgs->Item(2).AdoptPairListValue(Move(resultPoints));
break;
}
case eCSSKeyword_inset: {
MOZ_ASSERT(func1->Count() == 6 && func2->Count() == 6,
"Update for CSSParserImpl::ParseInsetFunction changes");
// Items 1-4 are respectively the top, right, bottom and left offsets
// from the reference box.
for (size_t i = 1; i <= 4; ++i) {
if (!AddCSSValuePixelPercentCalc(aRestriction == Restrictions::Enable
? CSS_PROPERTY_VALUE_NONNEGATIVE
: 0,
GetCommonUnit(aProperty,
func1->Item(i).GetUnit(),
func2->Item(i).GetUnit()),
aCoeff1, func1->Item(i),
aCoeff2, func2->Item(i),
resultFuncArgs->Item(i))) {
return nullptr;
}
}
// Item 5 contains the radii of the rounded corners for the inset
// rectangle.
MOZ_ASSERT(func1->Item(5).GetUnit() == eCSSUnit_Array &&
func2->Item(5).GetUnit() == eCSSUnit_Array,
"Expected two arrays");
const nsCSSValue::Array* radii1 = func1->Item(5).GetArrayValue();
const nsCSSValue::Array* radii2 = func2->Item(5).GetArrayValue();
MOZ_ASSERT(radii1->Count() == 4 && radii2->Count() == 4);
nsCSSValue::Array* resultRadii = nsCSSValue::Array::Create(4);
resultFuncArgs->Item(5).SetArrayValue(resultRadii, eCSSUnit_Array);
// We use an arbitrary border-radius property here to get the appropriate
// restrictions for radii since this is a <border-radius> value.
uint32_t restrictions =
aRestriction == Restrictions::Enable
? nsCSSProps::ValueRestrictions(eCSSProperty_border_top_left_radius)
: 0;
for (size_t i = 0; i < 4; ++i) {
const nsCSSValuePair& pair1 = radii1->Item(i).GetPairValue();
const nsCSSValuePair& pair2 = radii2->Item(i).GetPairValue();
const Maybe<nsCSSValuePair> pairResult =
AddCSSValuePair(aProperty, restrictions,
aCoeff1, &pair1,
aCoeff2, &pair2);
if (!pairResult) {
return nullptr;
}
resultRadii->Item(i).SetPairValue(pairResult.ptr());
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE("Unknown shape type");
return nullptr;
}
// set the geometry-box value
result->Item(1).SetIntValue(aArray1->Item(1).GetIntValue(),
eCSSUnit_Enumerated);
return result.forget();
}
static nsCSSValueList*
AddTransformLists(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
nsCSSKeyword aOperatorType)
{
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
do {
RefPtr<nsCSSValue::Array> a1 = ToPrimitive(aList1->mValue.GetArrayValue()),
a2 = ToPrimitive(aList2->mValue.GetArrayValue());
MOZ_ASSERT(
TransformFunctionsMatch(nsStyleTransformMatrix::TransformFunctionOf(a1),
nsStyleTransformMatrix::TransformFunctionOf(a2)),
"transform function mismatch");
MOZ_ASSERT(!*resultTail,
"resultTail isn't pointing to the tail (may leak)");
nsCSSKeyword tfunc = nsStyleTransformMatrix::TransformFunctionOf(a1);
RefPtr<nsCSSValue::Array> arr;
if (tfunc != eCSSKeyword_matrix &&
tfunc != eCSSKeyword_matrix3d &&
tfunc != eCSSKeyword_interpolatematrix &&
tfunc != eCSSKeyword_rotate3d &&
tfunc != eCSSKeyword_perspective) {
arr = StyleAnimationValue::AppendTransformFunction(tfunc, resultTail);
}
switch (tfunc) {
case eCSSKeyword_translate3d: {
MOZ_ASSERT(a1->Count() == 4, "unexpected count");
MOZ_ASSERT(a2->Count() == 4, "unexpected count");
AddTransformTranslate(aCoeff1, a1->Item(1), aCoeff2, a2->Item(1),
arr->Item(1));
AddTransformTranslate(aCoeff1, a1->Item(2), aCoeff2, a2->Item(2),
arr->Item(2));
AddTransformTranslate(aCoeff1, a1->Item(3), aCoeff2, a2->Item(3),
arr->Item(3));
break;
}
case eCSSKeyword_scale3d: {
MOZ_ASSERT(a1->Count() == 4, "unexpected count");
MOZ_ASSERT(a2->Count() == 4, "unexpected count");
AddTransformScale(aCoeff1, a1->Item(1), aCoeff2, a2->Item(1),
arr->Item(1));
AddTransformScale(aCoeff1, a1->Item(2), aCoeff2, a2->Item(2),
arr->Item(2));
AddTransformScale(aCoeff1, a1->Item(3), aCoeff2, a2->Item(3),
arr->Item(3));
break;
}
// It would probably be nicer to animate skew in tangent space
// rather than angle space. However, it's easy to specify
// skews with infinite tangents, and behavior changes pretty
// drastically when crossing such skews (since the direction of
// animation flips), so interop is probably more important here.
case eCSSKeyword_skew: {
MOZ_ASSERT(a1->Count() == 2 || a1->Count() == 3,
"unexpected count");
MOZ_ASSERT(a2->Count() == 2 || a2->Count() == 3,
"unexpected count");
nsCSSValue zero(0.0f, eCSSUnit_Radian);
// Add Y component of skew.
AddCSSValueAngle(aCoeff1,
a1->Count() == 3 ? a1->Item(2) : zero,
aCoeff2,
a2->Count() == 3 ? a2->Item(2) : zero,
arr->Item(2));
// Add X component of skew (which can be merged with case below
// in non-DEBUG).
AddCSSValueAngle(aCoeff1, a1->Item(1), aCoeff2, a2->Item(1),
arr->Item(1));
break;
}
case eCSSKeyword_skewx:
case eCSSKeyword_skewy:
case eCSSKeyword_rotate:
case eCSSKeyword_rotatex:
case eCSSKeyword_rotatey:
case eCSSKeyword_rotatez: {
MOZ_ASSERT(a1->Count() == 2, "unexpected count");
MOZ_ASSERT(a2->Count() == 2, "unexpected count");
AddCSSValueAngle(aCoeff1, a1->Item(1), aCoeff2, a2->Item(1),
arr->Item(1));
break;
}
case eCSSKeyword_rotate3d: {
Point3D vector1(a1->Item(1).GetFloatValue(),
a1->Item(2).GetFloatValue(),
a1->Item(3).GetFloatValue());
vector1.Normalize();
Point3D vector2(a2->Item(1).GetFloatValue(),
a2->Item(2).GetFloatValue(),
a2->Item(3).GetFloatValue());
vector2.Normalize();
// Handle rotate3d with matched (normalized) vectors,
// otherwise fallthrough to the next switch statement
// and do matrix decomposition.
if (vector1 == vector2) {
// We skipped appending a transform function above for rotate3d,
// so do it now.
arr = StyleAnimationValue::AppendTransformFunction(tfunc, resultTail);
arr->Item(1).SetFloatValue(vector1.x, eCSSUnit_Number);
arr->Item(2).SetFloatValue(vector1.y, eCSSUnit_Number);
arr->Item(3).SetFloatValue(vector1.z, eCSSUnit_Number);
AddCSSValueAngle(aCoeff1, a1->Item(4), aCoeff2, a2->Item(4),
arr->Item(4));
break;
}
MOZ_FALLTHROUGH;
}
case eCSSKeyword_matrix:
case eCSSKeyword_matrix3d:
case eCSSKeyword_perspective:
if (aCoeff1 == 0.0 && aCoeff2 == 0.0) {
// Special case. If both coefficients are 0.0, we should apply an
// identity transform function.
arr = StyleAnimationValue::AppendTransformFunction(tfunc, resultTail);
if (tfunc == eCSSKeyword_rotate3d) {
arr->Item(1).SetFloatValue(0.0, eCSSUnit_Number);
arr->Item(2).SetFloatValue(0.0, eCSSUnit_Number);
arr->Item(3).SetFloatValue(1.0, eCSSUnit_Number);
arr->Item(4).SetFloatValue(0.0, eCSSUnit_Radian);
} else if (tfunc == eCSSKeyword_perspective) {
// The parameter of the identity perspective function is
// positive infinite.
arr->Item(1).SetFloatValue(std::numeric_limits<float>::infinity(),
eCSSUnit_Pixel);
} else {
nsStyleTransformMatrix::SetIdentityMatrix(arr);
}
break;
}
MOZ_FALLTHROUGH;
case eCSSKeyword_interpolatematrix: {
// FIXME: If the matrix contains only numbers then we could decompose
// here.
// Construct temporary lists with only this item in them.
nsCSSValueList tempList1, tempList2;
tempList1.mValue = aList1->mValue;
tempList2.mValue = aList2->mValue;
if (aList1 == aList2) {
*resultTail =
AddDifferentTransformLists(aCoeff1, &tempList1,
aCoeff2, &tempList1,
aOperatorType);
} else {
*resultTail =
AddDifferentTransformLists(aCoeff1, &tempList1,
aCoeff2, &tempList2,
aOperatorType);
}
// Now advance resultTail to point to the new tail slot.
while (*resultTail) {
resultTail = &(*resultTail)->mNext;
}
break;
}
default:
MOZ_ASSERT_UNREACHABLE(
"unknown transform function or accumulatematrix");
}
aList1 = aList1->mNext;
aList2 = aList2->mNext;
} while (aList1);
MOZ_ASSERT(!aList2, "list length mismatch");
MOZ_ASSERT(!*resultTail,
"resultTail isn't pointing to the tail");
return result.forget();
}
static void
AddPositionCoords(double aCoeff1, const nsCSSValue& aPos1,
double aCoeff2, const nsCSSValue& aPos2,
nsCSSValue& aResultPos)
{
const nsCSSValue::Array* posArray1 = aPos1.GetArrayValue();
const nsCSSValue::Array* posArray2 = aPos2.GetArrayValue();
nsCSSValue::Array* resultPosArray = nsCSSValue::Array::Create(2);
aResultPos.SetArrayValue(resultPosArray, eCSSUnit_Array);
/* Only compute element 1. The <position-coord> is
* 'uncomputed' to only that element.
*/
const nsCSSValue& v1 = posArray1->Item(1);
const nsCSSValue& v2 = posArray2->Item(1);
nsCSSValue& vr = resultPosArray->Item(1);
AddCSSValueCanonicalCalc(aCoeff1, v1,
aCoeff2, v2, vr);
}
static UniquePtr<nsCSSValueList>
AddWeightedShadowList(double aCoeff1,
const nsCSSValueList* aShadow1,
double aCoeff2,
const nsCSSValueList* aShadow2,
ColorAdditionType aColorAdditionType)
{
// This is implemented according to:
// http://dev.w3.org/csswg/css3-transitions/#animation-of-property-types-
// and the third item in the summary of:
// http://lists.w3.org/Archives/Public/www-style/2009Jul/0050.html
UniquePtr<nsCSSValueList> result;
nsCSSValueList* tail = nullptr;
while (aShadow1 && aShadow2) {
UniquePtr<nsCSSValueList> shadowValue =
AddWeightedShadowItems(aCoeff1, aShadow1->mValue,
aCoeff2, aShadow2->mValue,
aColorAdditionType);
if (!shadowValue) {
return nullptr;
}
aShadow1 = aShadow1->mNext;
aShadow2 = aShadow2->mNext;
AppendToCSSValueList(result, Move(shadowValue), &tail);
}
if (aShadow1 || aShadow2) {
const nsCSSValueList *longShadow;
double longCoeff;
if (aShadow1) {
longShadow = aShadow1;
longCoeff = aCoeff1;
} else {
longShadow = aShadow2;
longCoeff = aCoeff2;
}
while (longShadow) {
// Passing coefficients that add to less than 1 produces the
// desired result of interpolating "0 0 0 transparent" with
// the current shadow.
UniquePtr<nsCSSValueList> shadowValue =
AddWeightedShadowItems(longCoeff, longShadow->mValue,
0.0, longShadow->mValue,
aColorAdditionType);
if (!shadowValue) {
return nullptr;
}
longShadow = longShadow->mNext;
AppendToCSSValueList(result, Move(shadowValue), &tail);
}
}
return result;
}
static UniquePtr<nsCSSValueList>
AddWeightedFilterList(double aCoeff1, const nsCSSValueList* aList1,
double aCoeff2, const nsCSSValueList* aList2,
ColorAdditionType aColorAdditionType)
{
UniquePtr<nsCSSValueList> result;
nsCSSValueList* tail = nullptr;
while (aList1 || aList2) {
if ((aList1 && aList1->mValue.GetUnit() != eCSSUnit_Function) ||
(aList2 && aList2->mValue.GetUnit() != eCSSUnit_Function)) {
// If we don't have filter-functions, we must have filter-URLs, which
// we can't add or interpolate.
return nullptr;
}
UniquePtr<nsCSSValueList> resultFunction =
AddWeightedFilterFunction(aCoeff1, aList1, aCoeff2, aList2,
aColorAdditionType);
if (!resultFunction) {
// filter function mismatch
return nullptr;
}
AppendToCSSValueList(result, Move(resultFunction), &tail);
// move to next aList items
if (aList1) {
aList1 = aList1->mNext;
}
if (aList2) {
aList2 = aList2->mNext;
}
}
return result;
}
bool
StyleAnimationValue::AddWeighted(nsCSSPropertyID aProperty,
double aCoeff1,
const StyleAnimationValue& aValue1,
double aCoeff2,
const StyleAnimationValue& aValue2,
StyleAnimationValue& aResultValue)
{
Unit commonUnit =
GetCommonUnit(aProperty, aValue1.GetUnit(), aValue2.GetUnit());
// Maybe need a followup method to convert the inputs into the common
// unit-type, if they don't already match it. (Or would it make sense to do
// that in GetCommonUnit? in which case maybe ConvertToCommonUnit would be
// better.)
switch (commonUnit) {
case eUnit_Null:
case eUnit_Auto:
case eUnit_None:
case eUnit_Normal:
case eUnit_UnparsedString:
case eUnit_URL:
case eUnit_DiscreteCSSValue:
return false;
case eUnit_Enumerated:
switch (aProperty) {
case eCSSProperty_font_stretch: {
// Animate just like eUnit_Integer.
int32_t result = floor(aCoeff1 * double(aValue1.GetIntValue()) +
aCoeff2 * double(aValue2.GetIntValue()));
if (result < NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED) {
result = NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED;
} else if (result > NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED) {
result = NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED;
}
aResultValue.SetIntValue(result, eUnit_Enumerated);
return true;
}
default:
return false;
}
case eUnit_Visibility: {
int32_t enum1 = aValue1.GetIntValue();
int32_t enum2 = aValue2.GetIntValue();
if (enum1 == enum2) {
aResultValue.SetIntValue(enum1, eUnit_Visibility);
return true;
}
if ((enum1 == NS_STYLE_VISIBILITY_VISIBLE) ==
(enum2 == NS_STYLE_VISIBILITY_VISIBLE)) {
return false;
}
int32_t val1 = enum1 == NS_STYLE_VISIBILITY_VISIBLE;
int32_t val2 = enum2 == NS_STYLE_VISIBILITY_VISIBLE;
double interp = aCoeff1 * val1 + aCoeff2 * val2;
int32_t result = interp > 0.0 ? NS_STYLE_VISIBILITY_VISIBLE
: (val1 ? enum2 : enum1);
aResultValue.SetIntValue(result, eUnit_Visibility);
return true;
}
case eUnit_Integer: {
// http://dev.w3.org/csswg/css3-transitions/#animation-of-property-types-
// says we should use floor
int32_t result = floor(aCoeff1 * double(aValue1.GetIntValue()) +
aCoeff2 * double(aValue2.GetIntValue()));
if (aProperty == eCSSProperty_font_weight) {
if (result < 100) {
result = 100;
} else if (result > 900) {
result = 900;
}
result -= result % 100;
} else {
result = RestrictValue(aProperty, result);
}
aResultValue.SetIntValue(result, eUnit_Integer);
return true;
}
case eUnit_Coord: {
aResultValue.SetCoordValue(RestrictValue(aProperty, NSToCoordRound(
aCoeff1 * aValue1.GetCoordValue() +
aCoeff2 * aValue2.GetCoordValue())));
return true;
}
case eUnit_Percent: {
aResultValue.SetPercentValue(RestrictValue(aProperty,
aCoeff1 * aValue1.GetPercentValue() +
aCoeff2 * aValue2.GetPercentValue()));
return true;
}
case eUnit_Float: {
aResultValue.SetFloatValue(RestrictValue(aProperty,
aCoeff1 * aValue1.GetFloatValue() +
aCoeff2 * aValue2.GetFloatValue()));
return true;
}
case eUnit_Color: {
RGBAColorData color1 = ExtractColor(aValue1);
RGBAColorData color2 = ExtractColor(aValue2);
auto resultColor = MakeUnique<nsCSSValue>();
resultColor->SetColorValue(
AddWeightedColorsAndClamp(aCoeff1, color1, aCoeff2, color2));
aResultValue.SetAndAdoptCSSValueValue(resultColor.release(), eUnit_Color);
return true;
}
case eUnit_CurrentColor: {
aResultValue.SetCurrentColorValue();
return true;
}
case eUnit_ComplexColor: {
ComplexColorData color1 = ExtractComplexColor(aValue1);
ComplexColorData color2 = ExtractComplexColor(aValue2);
RefPtr<ComplexColorValue> result = new ComplexColorValue;
// Common case is interpolating between a color and a currentcolor.
if (color1.IsNumericColor() && color2.IsCurrentColor()) {
result->mColor = color1.mColor;
result->mForegroundRatio = aCoeff2;
} else if (color1.IsCurrentColor() && color2.IsNumericColor()) {
result->mColor = color2.mColor;
result->mForegroundRatio = aCoeff1;
} else {
float ratio1 = 1.0f - color1.mForegroundRatio;
float ratio2 = 1.0f - color2.mForegroundRatio;
float alpha1 = color1.mColor.mA * ratio1;
float alpha2 = color2.mColor.mA * ratio2;
RGBAColorData resultColor =
AddWeightedColors(aCoeff1, color1.mColor.WithAlpha(alpha1),
aCoeff2, color2.mColor.WithAlpha(alpha2));
float resultRatio = color1.mForegroundRatio * aCoeff1 +
color2.mForegroundRatio * aCoeff2;
float resultAlpha = resultColor.mA / (1.0f - resultRatio);
result->mColor = resultColor.WithAlpha(resultAlpha);
result->mForegroundRatio = resultRatio;
}
aResultValue.SetComplexColorValue(result.forget());
return true;
}
case eUnit_Calc: {
PixelCalcValue v1 = ExtractCalcValue(aValue1);
PixelCalcValue v2 = ExtractCalcValue(aValue2);
double len = aCoeff1 * v1.mLength + aCoeff2 * v2.mLength;
double pct = aCoeff1 * v1.mPercent + aCoeff2 * v2.mPercent;
bool hasPct = (aCoeff1 != 0.0 && v1.mHasPercent) ||
(aCoeff2 != 0.0 && v2.mHasPercent);
nsCSSValue *val = new nsCSSValue();
nsCSSValue::Array *arr = nsCSSValue::Array::Create(1);
val->SetArrayValue(arr, eCSSUnit_Calc);
if (hasPct) {
nsCSSValue::Array *arr2 = nsCSSValue::Array::Create(2);
arr2->Item(0).SetFloatValue(len, eCSSUnit_Pixel);
arr2->Item(1).SetPercentValue(pct);
arr->Item(0).SetArrayValue(arr2, eCSSUnit_Calc_Plus);
} else {
arr->Item(0).SetFloatValue(len, eCSSUnit_Pixel);
}
aResultValue.SetAndAdoptCSSValueValue(val, eUnit_Calc);
return true;
}
case eUnit_ObjectPosition: {
const nsCSSValue* position1 = aValue1.GetCSSValueValue();
const nsCSSValue* position2 = aValue2.GetCSSValueValue();
nsAutoPtr<nsCSSValue> result(new nsCSSValue);
AddPositions(aCoeff1, *position1,
aCoeff2, *position2, *result);
aResultValue.SetAndAdoptCSSValueValue(result.forget(),
eUnit_ObjectPosition);
return true;
}
case eUnit_CSSValuePair: {
uint32_t restrictions = nsCSSProps::ValueRestrictions(aProperty);
Maybe<nsCSSValuePair> result =
AddCSSValuePair(aProperty, restrictions,
aCoeff1, aValue1.GetCSSValuePairValue(),
aCoeff2, aValue2.GetCSSValuePairValue());
if (!result) {
return false;
}
// We need a heap allocated object to adopt here:
auto heapResult = MakeUnique<nsCSSValuePair>(*result);
aResultValue.SetAndAdoptCSSValuePairValue(heapResult.release(),
eUnit_CSSValuePair);
return true;
}
case eUnit_CSSValueTriplet: {
nsCSSValueTriplet triplet1(*aValue1.GetCSSValueTripletValue());
nsCSSValueTriplet triplet2(*aValue2.GetCSSValueTripletValue());
nsCSSUnit unit[3];
unit[0] = GetCommonUnit(aProperty, triplet1.mXValue.GetUnit(),
triplet2.mXValue.GetUnit());
unit[1] = GetCommonUnit(aProperty, triplet1.mYValue.GetUnit(),
triplet2.mYValue.GetUnit());
unit[2] = GetCommonUnit(aProperty, triplet1.mZValue.GetUnit(),
triplet2.mZValue.GetUnit());
if (unit[0] == eCSSUnit_Null || unit[1] == eCSSUnit_Null ||
unit[2] == eCSSUnit_Null) {
return false;
}
nsAutoPtr<nsCSSValueTriplet> result(new nsCSSValueTriplet);
static nsCSSValue nsCSSValueTriplet::* const tripletValues[3] = {
&nsCSSValueTriplet::mXValue, &nsCSSValueTriplet::mYValue, &nsCSSValueTriplet::mZValue
};
uint32_t restrictions = nsCSSProps::ValueRestrictions(aProperty);
for (uint32_t i = 0; i < 3; ++i) {
nsCSSValue nsCSSValueTriplet::*member = tripletValues[i];
if (!AddCSSValuePixelPercentCalc(restrictions, unit[i],
aCoeff1, &triplet1->*member,
aCoeff2, &triplet2->*member,
result->*member) ) {
MOZ_ASSERT(false, "unexpected unit");
return false;
}
}
aResultValue.SetAndAdoptCSSValueTripletValue(result.forget(),
eUnit_CSSValueTriplet);
return true;
}
case eUnit_CSSRect: {
MOZ_ASSERT(nsCSSProps::ValueRestrictions(aProperty) == 0,
"must add code for handling value restrictions");
const nsCSSRect *rect1 = aValue1.GetCSSRectValue();
const nsCSSRect *rect2 = aValue2.GetCSSRectValue();
if (rect1->mTop.GetUnit() != rect2->mTop.GetUnit() ||
rect1->mRight.GetUnit() != rect2->mRight.GetUnit() ||
rect1->mBottom.GetUnit() != rect2->mBottom.GetUnit() ||
rect1->mLeft.GetUnit() != rect2->mLeft.GetUnit()) {
// At least until we have calc()
return false;
}
nsAutoPtr<nsCSSRect> result(new nsCSSRect);
for (uint32_t i = 0; i < ArrayLength(nsCSSRect::sides); ++i) {
nsCSSValue nsCSSRect::*member = nsCSSRect::sides[i];
MOZ_ASSERT((rect1->*member).GetUnit() == (rect2->*member).GetUnit(),
"should have returned above");
switch ((rect1->*member).GetUnit()) {
case eCSSUnit_Pixel:
AddCSSValuePixel(aCoeff1, rect1->*member, aCoeff2, rect2->*member,
result->*member);
break;
case eCSSUnit_Auto:
if (float(aCoeff1 + aCoeff2) != 1.0f) {
// Interpolating between two auto values makes sense;
// adding in other ratios does not.
return false;
}
(result->*member).SetAutoValue();
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
}
aResultValue.SetAndAdoptCSSRectValue(result.forget(), eUnit_CSSRect);
return true;
}
case eUnit_Dasharray: {
const nsCSSValueList *list1 = aValue1.GetCSSValueListValue();
const nsCSSValueList *list2 = aValue2.GetCSSValueListValue();
uint32_t len1 = 0, len2 = 0;
for (const nsCSSValueList *v = list1; v; v = v->mNext) {
++len1;
}
for (const nsCSSValueList *v = list2; v; v = v->mNext) {
++len2;
}
MOZ_ASSERT(len1 > 0 && len2 > 0, "unexpected length");
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = EuclidLCM<uint32_t>(len1, len2); i != i_end; ++i) {
const nsCSSValue &v1 = list1->mValue;
const nsCSSValue &v2 = list2->mValue;
MOZ_ASSERT(v1.GetUnit() == eCSSUnit_Number ||
v1.GetUnit() == eCSSUnit_Percent, "unexpected");
MOZ_ASSERT(v2.GetUnit() == eCSSUnit_Number ||
v2.GetUnit() == eCSSUnit_Percent, "unexpected");
if (v1.GetUnit() != v2.GetUnit()) {
// Can't animate between lengths and percentages (until calc()).
return false;
}
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
if (v1.GetUnit() == eCSSUnit_Number) {
AddCSSValueNumber(aCoeff1, v1, aCoeff2, v2, item->mValue,
CSS_PROPERTY_VALUE_NONNEGATIVE);
} else {
AddCSSValuePercent(aCoeff1, v1, aCoeff2, v2, item->mValue,
CSS_PROPERTY_VALUE_NONNEGATIVE);
}
list1 = list1->mNext;
if (!list1) {
list1 = aValue1.GetCSSValueListValue();
}
list2 = list2->mNext;
if (!list2) {
list2 = aValue2.GetCSSValueListValue();
}
}
aResultValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Dasharray);
return true;
}
case eUnit_Shadow: {
UniquePtr<nsCSSValueList> result =
AddWeightedShadowList(aCoeff1,
aValue1.GetCSSValueListValue(),
aCoeff2,
aValue2.GetCSSValueListValue(),
ColorAdditionType::Clamped);
if (!result) {
return false;
}
aResultValue.SetAndAdoptCSSValueListValue(result.release(), eUnit_Shadow);
return true;
}
case eUnit_Shape: {
RefPtr<nsCSSValue::Array> result =
AddShapeFunction(aProperty,
aCoeff1, aValue1.GetCSSValueArrayValue(),
aCoeff2, aValue2.GetCSSValueArrayValue());
if (!result) {
return false;
}
aResultValue.SetCSSValueArrayValue(result, eUnit_Shape);
return true;
}
case eUnit_Filter: {
UniquePtr<nsCSSValueList> result =
AddWeightedFilterList(aCoeff1, aValue1.GetCSSValueListValue(),
aCoeff2, aValue2.GetCSSValueListValue(),
ColorAdditionType::Clamped);
if (!result) {
return false;
}
aResultValue.SetAndAdoptCSSValueListValue(result.release(),
eUnit_Filter);
return true;
}
case eUnit_Transform: {
const nsCSSValueList* list1 = aValue1.GetCSSValueSharedListValue()->mHead;
const nsCSSValueList* list2 = aValue2.GetCSSValueSharedListValue()->mHead;
MOZ_ASSERT(list1);
MOZ_ASSERT(list2);
// We want to avoid the matrix decomposition when we can, since
// avoiding it can produce better results both for compound
// transforms and for skew and skewY (see below). We can do this
// in two cases:
// (1) if one of the transforms is 'none'
// (2) if the lists have the same length and the transform
// functions match
nsAutoPtr<nsCSSValueList> result;
if (list1->mValue.GetUnit() == eCSSUnit_None) {
if (list2->mValue.GetUnit() == eCSSUnit_None) {
result = new nsCSSValueList;
if (result) {
result->mValue.SetNoneValue();
}
} else if (HasAccumulateMatrix(list2)) {
result = AddDifferentTransformLists(0, list2, aCoeff2, list2,
eCSSKeyword_interpolatematrix);
} else {
result = AddTransformLists(0, list2, aCoeff2, list2);
}
} else {
if (list2->mValue.GetUnit() == eCSSUnit_None) {
if (HasAccumulateMatrix(list1)) {
result = AddDifferentTransformLists(0, list1,
aCoeff1, list1,
eCSSKeyword_interpolatematrix);
} else {
result = AddTransformLists(0, list1, aCoeff1, list1);
}
} else if (TransformFunctionListsMatch(list1, list2)) {
result = AddTransformLists(aCoeff1, list1, aCoeff2, list2,
eCSSKeyword_interpolatematrix);
} else {
result = AddDifferentTransformLists(aCoeff1, list1,
aCoeff2, list2,
eCSSKeyword_interpolatematrix);
}
}
aResultValue.SetTransformValue(new nsCSSValueSharedList(result.forget()));
return true;
}
case eUnit_BackgroundPositionCoord: {
const nsCSSValueList *position1 = aValue1.GetCSSValueListValue();
const nsCSSValueList *position2 = aValue2.GetCSSValueListValue();
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
while (position1 && position2) {
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
AddPositionCoords(aCoeff1, position1->mValue,
aCoeff2, position2->mValue, item->mValue);
position1 = position1->mNext;
position2 = position2->mNext;
}
// Check for different lengths
if (position1 || position2) {
return false;
}
aResultValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_BackgroundPositionCoord);
return true;
}
case eUnit_CSSValuePairList: {
const nsCSSValuePairList *list1 = aValue1.GetCSSValuePairListValue();
const nsCSSValuePairList *list2 = aValue2.GetCSSValuePairListValue();
UniquePtr<nsCSSValuePairList> result =
AddCSSValuePairList(aProperty, aCoeff1, list1, aCoeff2, list2);
if (!result) {
return false;
}
aResultValue.SetAndAdoptCSSValuePairListValue(result.release());
return true;
}
}
MOZ_ASSERT(false, "Can't interpolate using the given common unit");
return false;
}
StyleAnimationValue
StyleAnimationValue::Accumulate(nsCSSPropertyID aProperty,
const StyleAnimationValue& aA,
StyleAnimationValue&& aB,
uint64_t aCount)
{
StyleAnimationValue result(Move(aB));
if (aCount == 0) {
return result;
}
Unit commonUnit =
GetCommonUnit(aProperty, result.GetUnit(), aA.GetUnit());
switch (commonUnit) {
case eUnit_Filter: {
UniquePtr<nsCSSValueList> resultList =
AddWeightedFilterList(1.0, result.GetCSSValueListValue(),
aCount, aA.GetCSSValueListValue(),
ColorAdditionType::Unclamped);
if (resultList) {
result.SetAndAdoptCSSValueListValue(resultList.release(), eUnit_Filter);
}
break;
}
case eUnit_Shadow: {
UniquePtr<nsCSSValueList> resultList =
AddWeightedShadowList(1.0, result.GetCSSValueListValue(),
aCount, aA.GetCSSValueListValue(),
ColorAdditionType::Unclamped);
if (resultList) {
result.SetAndAdoptCSSValueListValue(resultList.release(), eUnit_Shadow);
}
break;
}
case eUnit_Color: {
RGBAColorData color1 = ExtractColor(result);
RGBAColorData color2 = ExtractColor(aA);
result.mValue.mCSSValue->SetRGBAColorValue(
AddWeightedColors(1.0, color1, aCount, color2));
break;
}
case eUnit_Transform: {
const nsCSSValueList* listA =
aA.GetCSSValueSharedListValue()->mHead;
const nsCSSValueList* listB =
result.GetCSSValueSharedListValue()->mHead;
MOZ_ASSERT(listA);
MOZ_ASSERT(listB);
nsAutoPtr<nsCSSValueList> resultList;
if (listA->mValue.GetUnit() == eCSSUnit_None ||
listB->mValue.GetUnit() == eCSSUnit_None) {
break;
} else if (TransformFunctionListsMatch(listA, listB)) {
resultList = AddTransformLists(1.0, listB, aCount, listA,
eCSSKeyword_accumulatematrix);
} else {
resultList = AddDifferentTransformLists(1.0, listB,
aCount, listA,
eCSSKeyword_accumulatematrix);
}
result.SetTransformValue(new nsCSSValueSharedList(resultList.forget()));
break;
}
default:
Unused << AddWeighted(aProperty,
1.0, result,
aCount, aA,
result);
break;
}
return result;
}
already_AddRefed<css::StyleRule>
BuildStyleRule(nsCSSPropertyID aProperty,
dom::Element* aTargetElement,
const nsAString& aSpecifiedValue,
bool aUseSVGMode)
{
// Set up an empty CSS Declaration
RefPtr<css::Declaration> declaration(new css::Declaration());
declaration->InitializeEmpty();
bool changed; // ignored, but needed as outparam for ParseProperty
nsIDocument* doc = aTargetElement->OwnerDoc();
nsCOMPtr<nsIURI> baseURI = aTargetElement->GetBaseURI();
nsCSSParser parser(doc->CSSLoader());
nsCSSPropertyID propertyToCheck = nsCSSProps::IsShorthand(aProperty) ?
nsCSSProps::SubpropertyEntryFor(aProperty)[0] : aProperty;
// Get a parser, parse the property, and check for CSS parsing errors.
// If this fails, we bail out and delete the declaration.
parser.ParseProperty(aProperty, aSpecifiedValue, doc->GetDocumentURI(),
baseURI, aTargetElement->NodePrincipal(), declaration,
&changed, false, aUseSVGMode);
// check whether property parsed without CSS parsing errors
if (!declaration->HasNonImportantValueFor(propertyToCheck)) {
return nullptr;
}
RefPtr<css::StyleRule> rule = new css::StyleRule(nullptr,
declaration,
0, 0);
return rule.forget();
}
already_AddRefed<css::StyleRule>
BuildStyleRule(nsCSSPropertyID aProperty,
dom::Element* aTargetElement,
const nsCSSValue& aSpecifiedValue,
bool aUseSVGMode)
{
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
"Should be a longhand property");
// Check if longhand failed to parse correctly.
if (aSpecifiedValue.GetUnit() == eCSSUnit_Null) {
return nullptr;
}
// Set up an empty CSS Declaration
RefPtr<css::Declaration> declaration(new css::Declaration());
declaration->InitializeEmpty();
// Add our longhand value
nsCSSExpandedDataBlock block;
declaration->ExpandTo(&block);
block.AddLonghandProperty(aProperty, aSpecifiedValue);
declaration->ValueAppended(aProperty);
declaration->CompressFrom(&block);
RefPtr<css::StyleRule> rule = new css::StyleRule(nullptr, declaration, 0, 0);
return rule.forget();
}
static bool
ComputeValuesFromStyleContext(
nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
nsStyleContext* aStyleContext,
nsTArray<PropertyStyleAnimationValuePair>& aValues)
{
// Extract computed value of our property (or all longhand components, if
// aProperty is a shorthand) from the temporary style context
if (nsCSSProps::IsShorthand(aProperty)) {
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty, aEnabledState) {
if (nsCSSProps::kAnimTypeTable[*p] == eStyleAnimType_None) {
// Skip non-animatable component longhands.
continue;
}
PropertyStyleAnimationValuePair* pair = aValues.AppendElement();
pair->mProperty = *p;
if (!StyleAnimationValue::ExtractComputedValue(*p, aStyleContext,
pair->mValue)) {
return false;
}
}
return true;
}
PropertyStyleAnimationValuePair* pair = aValues.AppendElement();
pair->mProperty = aProperty;
return StyleAnimationValue::ExtractComputedValue(aProperty, aStyleContext,
pair->mValue);
}
static bool
ComputeValuesFromStyleRule(nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
nsStyleContext* aStyleContext,
css::StyleRule* aStyleRule,
nsTArray<PropertyStyleAnimationValuePair>& aValues,
bool* aIsContextSensitive)
{
MOZ_ASSERT(aStyleContext);
if (!nsCSSProps::IsEnabled(aProperty, aEnabledState)) {
return false;
}
MOZ_ASSERT(aStyleContext->PresContext()->StyleSet()->IsGecko(),
"ServoStyleSet should not use StyleAnimationValue for animations");
nsStyleSet* styleSet = aStyleContext->PresContext()->StyleSet()->AsGecko();
RefPtr<nsStyleContext> tmpStyleContext;
if (aIsContextSensitive) {
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
"to correctly set aIsContextSensitive for shorthand properties, "
"this code must be adjusted");
nsCOMArray<nsIStyleRule> ruleArray;
ruleArray.AppendObject(styleSet->InitialStyleRule());
css::Declaration* declaration = aStyleRule->GetDeclaration();
ruleArray.AppendObject(declaration);
declaration->SetImmutable();
tmpStyleContext =
styleSet->ResolveStyleByAddingRules(aStyleContext, ruleArray);
if (!tmpStyleContext) {
return false;
}
// Force walk of rule tree
nsStyleStructID sid = nsCSSProps::kSIDTable[aProperty];
tmpStyleContext->StyleData(sid);
// The rule node will have unconditional cached style data if the value is
// not context-sensitive. So if there's nothing cached, it's not context
// sensitive.
*aIsContextSensitive =
!tmpStyleContext->RuleNode()->NodeHasCachedUnconditionalData(sid);
}
// If we're not concerned whether the property is context sensitive then just
// add the rule to a new temporary style context alongside the target
// element's style context.
// Also, if we previously discovered that this property IS context-sensitive
// then we need to throw the temporary style context out since the property's
// value may have been biased by the 'initial' values supplied.
if (!aIsContextSensitive || *aIsContextSensitive) {
nsCOMArray<nsIStyleRule> ruleArray;
css::Declaration* declaration = aStyleRule->GetDeclaration();
ruleArray.AppendObject(declaration);
declaration->SetImmutable();
tmpStyleContext =
styleSet->ResolveStyleByAddingRules(aStyleContext, ruleArray);
if (!tmpStyleContext) {
return false;
}
}
return ComputeValuesFromStyleContext(aProperty, aEnabledState,
tmpStyleContext, aValues);
}
/* static */ bool
StyleAnimationValue::ComputeValue(nsCSSPropertyID aProperty,
dom::Element* aTargetElement,
nsStyleContext* aStyleContext,
const nsAString& aSpecifiedValue,
bool aUseSVGMode,
StyleAnimationValue& aComputedValue,
bool* aIsContextSensitive)
{
MOZ_ASSERT(aTargetElement, "null target element");
// Parse specified value into a temporary css::StyleRule
// Note: BuildStyleRule needs an element's OwnerDoc, BaseURI, and Principal.
// If it is a pseudo element, use its parent element's OwnerDoc, BaseURI,
// and Principal.
RefPtr<css::StyleRule> styleRule =
BuildStyleRule(aProperty, aTargetElement, aSpecifiedValue, aUseSVGMode);
if (!styleRule) {
return false;
}
if (nsCSSProps::IsShorthand(aProperty) ||
nsCSSProps::kAnimTypeTable[aProperty] == eStyleAnimType_None) {
// Just capture the specified value
aComputedValue.SetUnparsedStringValue(nsString(aSpecifiedValue));
if (aIsContextSensitive) {
// Since we're just returning the string as-is, aComputedValue isn't going
// to change depending on the context
*aIsContextSensitive = false;
}
return true;
}
AutoTArray<PropertyStyleAnimationValuePair,1> values;
bool ok = ComputeValuesFromStyleRule(aProperty,
CSSEnabledState::eIgnoreEnabledState,
aStyleContext, styleRule,
values, aIsContextSensitive);
if (!ok) {
return false;
}
MOZ_ASSERT(values.Length() == 1);
MOZ_ASSERT(values[0].mProperty == aProperty);
aComputedValue = values[0].mValue;
return true;
}
template <class T>
bool
ComputeValuesFromSpecifiedValue(
nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
dom::Element* aTargetElement,
nsStyleContext* aStyleContext,
T& aSpecifiedValue,
bool aUseSVGMode,
nsTArray<PropertyStyleAnimationValuePair>& aResult)
{
MOZ_ASSERT(aTargetElement, "null target element");
// Parse specified value into a temporary css::StyleRule
// Note: BuildStyleRule needs an element's OwnerDoc, BaseURI, and Principal.
// If it is a pseudo element, use its parent element's OwnerDoc, BaseURI,
// and Principal.
RefPtr<css::StyleRule> styleRule =
BuildStyleRule(aProperty, aTargetElement, aSpecifiedValue, aUseSVGMode);
if (!styleRule) {
return false;
}
aResult.Clear();
return ComputeValuesFromStyleRule(aProperty, aEnabledState,
aStyleContext, styleRule, aResult,
/* aIsContextSensitive */ nullptr);
}
/* static */ bool
StyleAnimationValue::ComputeValues(
nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
dom::Element* aTargetElement,
nsStyleContext* aStyleContext,
const nsAString& aSpecifiedValue,
bool aUseSVGMode,
nsTArray<PropertyStyleAnimationValuePair>& aResult)
{
return ComputeValuesFromSpecifiedValue(aProperty, aEnabledState,
aTargetElement, aStyleContext,
aSpecifiedValue, aUseSVGMode,
aResult);
}
/* static */ bool
StyleAnimationValue::ComputeValues(
nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
dom::Element* aTargetElement,
nsStyleContext* aStyleContext,
const nsCSSValue& aSpecifiedValue,
bool aUseSVGMode,
nsTArray<PropertyStyleAnimationValuePair>& aResult)
{
return ComputeValuesFromSpecifiedValue(aProperty, aEnabledState,
aTargetElement, aStyleContext,
aSpecifiedValue, aUseSVGMode,
aResult);
}
/* static */ bool
StyleAnimationValue::ComputeValues(
nsCSSPropertyID aProperty,
CSSEnabledState aEnabledState,
nsStyleContext* aStyleContext,
const RawServoDeclarationBlock& aDeclarations,
nsTArray<PropertyStyleAnimationValuePair>& aValues)
{
MOZ_ASSERT(aStyleContext->PresContext()->StyleSet()->IsServo(),
"Should be using ServoStyleSet if we have a"
" RawServoDeclarationBlock");
if (!nsCSSProps::IsEnabled(aProperty, aEnabledState)) {
return false;
}
const ServoComputedValues* previousStyle =
aStyleContext->StyleSource().AsServoComputedValues();
// FIXME: Servo bindings don't yet represent const-ness so we just
// cast it away for now.
auto declarations = const_cast<RawServoDeclarationBlock*>(&aDeclarations);
RefPtr<ServoComputedValues> computedValues =
Servo_RestyleWithAddedDeclaration(declarations, previousStyle).Consume();
if (!computedValues) {
return false;
}
RefPtr<nsStyleContext> tmpStyleContext =
NS_NewStyleContext(aStyleContext, aStyleContext->PresContext(),
aStyleContext->GetPseudo(),
aStyleContext->GetPseudoType(),
computedValues.forget(),
false /* skipFixup */);
return ComputeValuesFromStyleContext(aProperty, aEnabledState,
tmpStyleContext, aValues);
}
bool
StyleAnimationValue::UncomputeValue(nsCSSPropertyID aProperty,
const StyleAnimationValue& aComputedValue,
nsCSSValue& aSpecifiedValue)
{
Unit unit = aComputedValue.GetUnit();
switch (unit) {
case eUnit_Normal:
aSpecifiedValue.SetNormalValue();
break;
case eUnit_Auto:
aSpecifiedValue.SetAutoValue();
break;
case eUnit_None:
aSpecifiedValue.SetNoneValue();
break;
case eUnit_Enumerated:
case eUnit_Visibility:
aSpecifiedValue.
SetIntValue(aComputedValue.GetIntValue(), eCSSUnit_Enumerated);
break;
case eUnit_Integer:
aSpecifiedValue.
SetIntValue(aComputedValue.GetIntValue(), eCSSUnit_Integer);
break;
case eUnit_Coord:
aSpecifiedValue.SetIntegerCoordValue(aComputedValue.GetCoordValue());
break;
case eUnit_Percent:
aSpecifiedValue.SetPercentValue(aComputedValue.GetPercentValue());
break;
case eUnit_Float:
aSpecifiedValue.
SetFloatValue(aComputedValue.GetFloatValue(), eCSSUnit_Number);
break;
case eUnit_CurrentColor:
aSpecifiedValue.SetIntValue(NS_COLOR_CURRENTCOLOR, eCSSUnit_EnumColor);
break;
case eUnit_Calc:
case eUnit_Color:
case eUnit_ObjectPosition:
case eUnit_URL:
case eUnit_DiscreteCSSValue: {
nsCSSValue* val = aComputedValue.GetCSSValueValue();
// Sanity-check that the underlying unit in the nsCSSValue is what we
// expect for our StyleAnimationValue::Unit:
MOZ_ASSERT((unit == eUnit_Calc && val->GetUnit() == eCSSUnit_Calc) ||
(unit == eUnit_Color &&
nsCSSValue::IsNumericColorUnit(val->GetUnit())) ||
(unit == eUnit_ObjectPosition &&
val->GetUnit() == eCSSUnit_Array) ||
(unit == eUnit_URL && val->GetUnit() == eCSSUnit_URL) ||
unit == eUnit_DiscreteCSSValue,
"unexpected unit");
aSpecifiedValue = *val;
break;
}
case eUnit_ComplexColor: {
aSpecifiedValue.SetComplexColorValue(
do_AddRef(aComputedValue.mValue.mComplexColor));
break;
}
case eUnit_CSSValuePair: {
// Rule node processing expects pair values to be collapsed to a
// single value if both halves would be equal, for most but not
// all properties. At present, all animatable properties that
// use pairs do expect collapsing.
const nsCSSValuePair* pair = aComputedValue.GetCSSValuePairValue();
if (pair->mXValue == pair->mYValue) {
aSpecifiedValue = pair->mXValue;
} else {
aSpecifiedValue.SetPairValue(pair);
}
} break;
case eUnit_CSSValueTriplet: {
// Rule node processing expects triplet values to be collapsed to a
// single value if both halves would be equal, for most but not
// all properties. At present, all animatable properties that
// use pairs do expect collapsing.
const nsCSSValueTriplet* triplet = aComputedValue.GetCSSValueTripletValue();
if (triplet->mXValue == triplet->mYValue && triplet->mYValue == triplet->mZValue) {
aSpecifiedValue = triplet->mXValue;
} else {
aSpecifiedValue.SetTripletValue(triplet);
}
} break;
case eUnit_CSSRect: {
nsCSSRect& rect = aSpecifiedValue.SetRectValue();
rect = *aComputedValue.GetCSSRectValue();
} break;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Filter:
case eUnit_BackgroundPositionCoord:
{
nsCSSValueList* computedList = aComputedValue.GetCSSValueListValue();
if (computedList) {
aSpecifiedValue.SetDependentListValue(computedList);
} else {
aSpecifiedValue.SetNoneValue();
}
}
break;
case eUnit_Shape: {
nsCSSValue::Array* computedArray = aComputedValue.GetCSSValueArrayValue();
aSpecifiedValue.SetArrayValue(computedArray, eCSSUnit_Array);
break;
}
case eUnit_Transform:
aSpecifiedValue.
SetSharedListValue(aComputedValue.GetCSSValueSharedListValue());
break;
case eUnit_CSSValuePairList:
aSpecifiedValue.
SetDependentPairListValue(aComputedValue.GetCSSValuePairListValue());
break;
default:
return false;
}
return true;
}
bool
StyleAnimationValue::UncomputeValue(nsCSSPropertyID aProperty,
StyleAnimationValue&& aComputedValue,
nsCSSValue& aSpecifiedValue)
{
Unit unit = aComputedValue.GetUnit();
switch (unit) {
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Filter:
case eUnit_BackgroundPositionCoord:
{
UniquePtr<nsCSSValueList> computedList =
aComputedValue.TakeCSSValueListValue();
if (computedList) {
aSpecifiedValue.AdoptListValue(Move(computedList));
} else {
aSpecifiedValue.SetNoneValue();
}
}
break;
case eUnit_CSSValuePairList:
{
UniquePtr<nsCSSValuePairList> computedList =
aComputedValue.TakeCSSValuePairListValue();
MOZ_ASSERT(computedList, "Pair list should never be null");
aSpecifiedValue.AdoptPairListValue(Move(computedList));
}
break;
default:
return UncomputeValue(aProperty, aComputedValue, aSpecifiedValue);
}
return true;
}
bool
StyleAnimationValue::UncomputeValue(nsCSSPropertyID aProperty,
const StyleAnimationValue& aComputedValue,
nsAString& aSpecifiedValue)
{
aSpecifiedValue.Truncate(); // Clear outparam, if it's not already empty
if (aComputedValue.GetUnit() == eUnit_UnparsedString) {
aComputedValue.GetStringValue(aSpecifiedValue);
return true;
}
nsCSSValue val;
if (!StyleAnimationValue::UncomputeValue(aProperty, aComputedValue, val)) {
return false;
}
val.AppendToString(aProperty, aSpecifiedValue, nsCSSValue::eNormalized);
return true;
}
template<typename T>
inline const T&
StyleDataAtOffset(const void* aStyleStruct, ptrdiff_t aOffset)
{
return *reinterpret_cast<const T*>(
reinterpret_cast<const uint8_t*>(aStyleStruct) + aOffset);
}
static bool
StyleCoordToValue(const nsStyleCoord& aCoord, StyleAnimationValue& aValue)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Normal:
aValue.SetNormalValue();
break;
case eStyleUnit_Auto:
aValue.SetAutoValue();
break;
case eStyleUnit_None:
aValue.SetNoneValue();
break;
case eStyleUnit_Percent:
aValue.SetPercentValue(aCoord.GetPercentValue());
break;
case eStyleUnit_Factor:
aValue.SetFloatValue(aCoord.GetFactorValue());
break;
case eStyleUnit_Coord:
aValue.SetCoordValue(aCoord.GetCoordValue());
break;
case eStyleUnit_Enumerated:
aValue.SetIntValue(aCoord.GetIntValue(),
StyleAnimationValue::eUnit_Enumerated);
break;
case eStyleUnit_Integer:
aValue.SetIntValue(aCoord.GetIntValue(),
StyleAnimationValue::eUnit_Integer);
break;
case eStyleUnit_Calc: {
nsAutoPtr<nsCSSValue> val(new nsCSSValue);
CalcValueToCSSValue(aCoord.GetCalcValue(), *val);
aValue.SetAndAdoptCSSValueValue(val.forget(),
StyleAnimationValue::eUnit_Calc);
break;
}
default:
return false;
}
return true;
}
static bool
StyleCoordToCSSValue(const nsStyleCoord& aCoord, nsCSSValue& aCSSValue)
{
switch (aCoord.GetUnit()) {
case eStyleUnit_Coord:
aCSSValue.SetIntegerCoordValue(aCoord.GetCoordValue());
break;
case eStyleUnit_Factor:
aCSSValue.SetFloatValue(aCoord.GetFactorValue(), eCSSUnit_Number);
break;
case eStyleUnit_Percent:
aCSSValue.SetPercentValue(aCoord.GetPercentValue());
break;
case eStyleUnit_Calc:
CalcValueToCSSValue(aCoord.GetCalcValue(), aCSSValue);
break;
case eStyleUnit_Degree:
aCSSValue.SetFloatValue(aCoord.GetAngleValue(), eCSSUnit_Degree);
break;
case eStyleUnit_Grad:
aCSSValue.SetFloatValue(aCoord.GetAngleValue(), eCSSUnit_Grad);
break;
case eStyleUnit_Radian:
aCSSValue.SetFloatValue(aCoord.GetAngleValue(), eCSSUnit_Radian);
break;
case eStyleUnit_Turn:
aCSSValue.SetFloatValue(aCoord.GetAngleValue(), eCSSUnit_Turn);
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
return true;
}
static void
SetPositionValue(const Position& aPos, nsCSSValue& aCSSValue)
{
RefPtr<nsCSSValue::Array> posArray = nsCSSValue::Array::Create(4);
aCSSValue.SetArrayValue(posArray.get(), eCSSUnit_Array);
// NOTE: Array entries #0 and #2 here are intentionally left untouched, with
// eCSSUnit_Null. The purpose of these entries in our specified-style
// <position> representation is to store edge names. But for values
// extracted from computed style (which is what we're dealing with here),
// we'll just have a normalized "x,y" position, with no edge names needed.
nsCSSValue& xValue = posArray->Item(1);
nsCSSValue& yValue = posArray->Item(3);
CalcValueToCSSValue(&aPos.mXPosition, xValue);
CalcValueToCSSValue(&aPos.mYPosition, yValue);
}
static void
SetPositionCoordValue(const Position::Coord& aPosCoord,
nsCSSValue& aCSSValue)
{
RefPtr<nsCSSValue::Array> posArray = nsCSSValue::Array::Create(2);
aCSSValue.SetArrayValue(posArray.get(), eCSSUnit_Array);
// NOTE: Array entry #0 here is intentionally left untouched, with
// eCSSUnit_Null. The purpose of this entry in our specified-style
// <position-coord> representation is to store edge names. But for values
// extracted from computed style (which is what we're dealing with here),
// we'll just have a normalized "x"/"y" position, with no edge names needed.
nsCSSValue& value = posArray->Item(1);
CalcValueToCSSValue(&aPosCoord, value);
}
/*
* Assign |aOutput = aInput|, except with any non-pixel lengths
* replaced with the equivalent in pixels, and any non-canonical calc()
* expressions replaced with canonical ones.
*/
static void
SubstitutePixelValues(nsStyleContext* aStyleContext,
const nsCSSValue& aInput, nsCSSValue& aOutput)
{
if (aInput.IsCalcUnit()) {
RuleNodeCacheConditions conditions;
nsRuleNode::ComputedCalc c =
nsRuleNode::SpecifiedCalcToComputedCalc(aInput, aStyleContext,
aStyleContext->PresContext(),
conditions);
nsStyleCoord::CalcValue c2;
c2.mLength = c.mLength;
c2.mPercent = c.mPercent;
c2.mHasPercent = true; // doesn't matter for transform translate
CalcValueToCSSValue(&c2, aOutput);
} else if (aInput.UnitHasArrayValue()) {
const nsCSSValue::Array *inputArray = aInput.GetArrayValue();
RefPtr<nsCSSValue::Array> outputArray =
nsCSSValue::Array::Create(inputArray->Count());
for (size_t i = 0, i_end = inputArray->Count(); i < i_end; ++i) {
SubstitutePixelValues(aStyleContext,
inputArray->Item(i), outputArray->Item(i));
}
aOutput.SetArrayValue(outputArray, aInput.GetUnit());
} else if (aInput.IsLengthUnit() &&
aInput.GetUnit() != eCSSUnit_Pixel) {
RuleNodeCacheConditions conditions;
nscoord len = nsRuleNode::CalcLength(aInput, aStyleContext,
aStyleContext->PresContext(),
conditions);
aOutput.SetFloatValue(nsPresContext::AppUnitsToFloatCSSPixels(len),
eCSSUnit_Pixel);
} else {
aOutput = aInput;
}
}
static void
ExtractImageLayerPositionXList(const nsStyleImageLayers& aLayer,
StyleAnimationValue& aComputedValue)
{
MOZ_ASSERT(aLayer.mPositionXCount > 0, "unexpected count");
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = aLayer.mPositionXCount; i != i_end; ++i) {
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
SetPositionCoordValue(aLayer.mLayers[i].mPosition.mXPosition,
item->mValue);
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
StyleAnimationValue::eUnit_BackgroundPositionCoord);
}
static void
ExtractImageLayerPositionYList(const nsStyleImageLayers& aLayer,
StyleAnimationValue& aComputedValue)
{
MOZ_ASSERT(aLayer.mPositionYCount > 0, "unexpected count");
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = aLayer.mPositionYCount; i != i_end; ++i) {
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
SetPositionCoordValue(aLayer.mLayers[i].mPosition.mYPosition,
item->mValue);
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
StyleAnimationValue::eUnit_BackgroundPositionCoord);
}
static void
ExtractImageLayerSizePairList(const nsStyleImageLayers& aLayer,
StyleAnimationValue& aComputedValue)
{
MOZ_ASSERT(aLayer.mSizeCount > 0, "unexpected count");
nsAutoPtr<nsCSSValuePairList> result;
nsCSSValuePairList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = aLayer.mSizeCount; i != i_end; ++i) {
nsCSSValuePairList *item = new nsCSSValuePairList;
*resultTail = item;
resultTail = &item->mNext;
const nsStyleImageLayers::Size &size = aLayer.mLayers[i].mSize;
switch (size.mWidthType) {
case nsStyleImageLayers::Size::eContain:
case nsStyleImageLayers::Size::eCover:
item->mXValue.SetIntValue(size.mWidthType,
eCSSUnit_Enumerated);
break;
case nsStyleImageLayers::Size::eAuto:
item->mXValue.SetAutoValue();
break;
case nsStyleImageLayers::Size::eLengthPercentage:
// XXXbz is there a good reason we can't just
// CalcValueToCSSValue(&size.mWidth, item->mXValue) here?
if (!size.mWidth.mHasPercent &&
// negative values must have come from calc()
size.mWidth.mLength >= 0) {
MOZ_ASSERT(size.mWidth.mPercent == 0.0f,
"Shouldn't have mPercent");
item->mXValue.SetIntegerCoordValue(size.mWidth.mLength);
} else if (size.mWidth.mLength == 0 &&
// negative values must have come from calc()
size.mWidth.mPercent >= 0.0f) {
item->mXValue.SetPercentValue(size.mWidth.mPercent);
} else {
CalcValueToCSSValue(&size.mWidth, item->mXValue);
}
break;
}
switch (size.mHeightType) {
case nsStyleImageLayers::Size::eContain:
case nsStyleImageLayers::Size::eCover:
// leave it null
break;
case nsStyleImageLayers::Size::eAuto:
item->mYValue.SetAutoValue();
break;
case nsStyleImageLayers::Size::eLengthPercentage:
// XXXbz is there a good reason we can't just
// CalcValueToCSSValue(&size.mHeight, item->mYValue) here?
if (!size.mHeight.mHasPercent &&
// negative values must have come from calc()
size.mHeight.mLength >= 0) {
MOZ_ASSERT(size.mHeight.mPercent == 0.0f,
"Shouldn't have mPercent");
item->mYValue.SetIntegerCoordValue(size.mHeight.mLength);
} else if (size.mHeight.mLength == 0 &&
// negative values must have come from calc()
size.mHeight.mPercent >= 0.0f) {
item->mYValue.SetPercentValue(size.mHeight.mPercent);
} else {
CalcValueToCSSValue(&size.mHeight, item->mYValue);
}
break;
}
}
aComputedValue.SetAndAdoptCSSValuePairListValue(result.forget());
}
static bool
StyleClipBasicShapeToCSSArray(const StyleClipPath& aClipPath,
nsCSSValue::Array* aResult)
{
MOZ_ASSERT(aResult->Count() == 2,
"Expected array to be presized for a function and the sizing-box");
const StyleBasicShape* shape = aClipPath.GetBasicShape();
nsCSSKeyword functionName = shape->GetShapeTypeName();
RefPtr<nsCSSValue::Array> functionArray;
switch (shape->GetShapeType()) {
case StyleBasicShapeType::Circle:
case StyleBasicShapeType::Ellipse: {
const nsTArray<nsStyleCoord>& coords = shape->Coordinates();
MOZ_ASSERT(coords.Length() == ShapeArgumentCount(functionName) - 1,
"Unexpected radii count");
// The "+1" is for the center point:
functionArray = aResult->Item(0).InitFunction(functionName,
coords.Length() + 1);
for (size_t i = 0; i < coords.Length(); ++i) {
if (coords[i].GetUnit() == eStyleUnit_Enumerated) {
functionArray->Item(i + 1).SetIntValue(coords[i].GetIntValue(),
eCSSUnit_Enumerated);
} else if (!StyleCoordToCSSValue(coords[i],
functionArray->Item(i + 1))) {
return false;
}
}
// Set functionArray's last item to the circle or ellipse's center point:
SetPositionValue(shape->GetPosition(),
functionArray->Item(functionArray->Count() - 1));
break;
}
case StyleBasicShapeType::Polygon: {
functionArray =
aResult->Item(0).InitFunction(functionName,
ShapeArgumentCount(functionName));
functionArray->Item(1).SetIntValue(shape->GetFillRule(),
eCSSUnit_Enumerated);
nsCSSValuePairList* list = functionArray->Item(2).SetPairListValue();
const nsTArray<nsStyleCoord>& coords = shape->Coordinates();
MOZ_ASSERT((coords.Length() % 2) == 0);
for (size_t i = 0; i < coords.Length(); i += 2) {
if (i > 0) {
list->mNext = new nsCSSValuePairList;
list = list->mNext;
}
if (!StyleCoordToCSSValue(coords[i], list->mXValue) ||
!StyleCoordToCSSValue(coords[i + 1], list->mYValue)) {
return false;
}
}
break;
}
case StyleBasicShapeType::Inset: {
const nsTArray<nsStyleCoord>& coords = shape->Coordinates();
MOZ_ASSERT(coords.Length() == ShapeArgumentCount(functionName) - 1,
"Unexpected offset count");
functionArray =
aResult->Item(0).InitFunction(functionName, coords.Length() + 1);
for (size_t i = 0; i < coords.Length(); ++i) {
if (!StyleCoordToCSSValue(coords[i], functionArray->Item(i + 1))) {
return false;
}
}
RefPtr<nsCSSValue::Array> radiusArray = nsCSSValue::Array::Create(4);
const nsStyleCorners& radii = shape->GetRadius();
NS_FOR_CSS_FULL_CORNERS(corner) {
auto pair = MakeUnique<nsCSSValuePair>();
if (!StyleCoordToCSSValue(radii.Get(NS_FULL_TO_HALF_CORNER(corner, false)),
pair->mXValue) ||
!StyleCoordToCSSValue(radii.Get(NS_FULL_TO_HALF_CORNER(corner, true)),
pair->mYValue)) {
return false;
}
radiusArray->Item(corner).SetPairValue(pair.get());
}
// Set the last item in functionArray to the radius array:
functionArray->Item(functionArray->Count() - 1).
SetArrayValue(radiusArray, eCSSUnit_Array);
break;
}
default:
MOZ_ASSERT_UNREACHABLE("Unknown shape type");
return false;
}
aResult->Item(1).SetIntValue(aClipPath.GetReferenceBox(),
eCSSUnit_Enumerated);
return true;
}
bool
StyleAnimationValue::ExtractComputedValue(nsCSSPropertyID aProperty,
nsStyleContext* aStyleContext,
StyleAnimationValue& aComputedValue)
{
MOZ_ASSERT(0 <= aProperty && aProperty < eCSSProperty_COUNT_no_shorthands,
"bad property");
const void* styleStruct =
aStyleContext->StyleData(nsCSSProps::kSIDTable[aProperty]);
ptrdiff_t ssOffset = nsCSSProps::kStyleStructOffsetTable[aProperty];
nsStyleAnimType animType = nsCSSProps::kAnimTypeTable[aProperty];
MOZ_ASSERT(0 <= ssOffset ||
animType == eStyleAnimType_Custom ||
animType == eStyleAnimType_Discrete,
"all animation types other than Custom and Discrete must " \
"specify a style struct offset to extract values from");
switch (animType) {
case eStyleAnimType_Custom:
switch (aProperty) {
// For border-width, ignore the border-image business (which
// only exists until we update our implementation to the current
// spec) and use GetComputedBorder
#define BORDER_WIDTH_CASE(prop_, side_) \
case prop_: \
aComputedValue.SetCoordValue( \
static_cast<const nsStyleBorder*>(styleStruct)-> \
GetComputedBorder().side_); \
break;
BORDER_WIDTH_CASE(eCSSProperty_border_bottom_width, bottom)
BORDER_WIDTH_CASE(eCSSProperty_border_left_width, left)
BORDER_WIDTH_CASE(eCSSProperty_border_right_width, right)
BORDER_WIDTH_CASE(eCSSProperty_border_top_width, top)
#undef BORDER_WIDTH_CASE
case eCSSProperty_column_rule_width:
aComputedValue.SetCoordValue(
static_cast<const nsStyleColumn*>(styleStruct)->
GetComputedColumnRuleWidth());
break;
case eCSSProperty_column_count: {
const nsStyleColumn *styleColumn =
static_cast<const nsStyleColumn*>(styleStruct);
if (styleColumn->mColumnCount == NS_STYLE_COLUMN_COUNT_AUTO) {
aComputedValue.SetAutoValue();
} else {
aComputedValue.SetIntValue(styleColumn->mColumnCount,
eUnit_Integer);
}
break;
}
case eCSSProperty_order: {
const nsStylePosition *stylePosition =
static_cast<const nsStylePosition*>(styleStruct);
aComputedValue.SetIntValue(stylePosition->mOrder,
eUnit_Integer);
break;
}
case eCSSProperty_border_spacing: {
const nsStyleTableBorder *styleTableBorder =
static_cast<const nsStyleTableBorder*>(styleStruct);
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
pair->mXValue.SetIntegerCoordValue(styleTableBorder->mBorderSpacingCol);
pair->mYValue.SetIntegerCoordValue(styleTableBorder->mBorderSpacingRow);
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
break;
}
case eCSSProperty_transform_origin: {
const nsStyleDisplay *styleDisplay =
static_cast<const nsStyleDisplay*>(styleStruct);
nsAutoPtr<nsCSSValueTriplet> triplet(new nsCSSValueTriplet);
if (!StyleCoordToCSSValue(styleDisplay->mTransformOrigin[0],
triplet->mXValue) ||
!StyleCoordToCSSValue(styleDisplay->mTransformOrigin[1],
triplet->mYValue) ||
!StyleCoordToCSSValue(styleDisplay->mTransformOrigin[2],
triplet->mZValue)) {
return false;
}
aComputedValue.SetAndAdoptCSSValueTripletValue(triplet.forget(),
eUnit_CSSValueTriplet);
break;
}
case eCSSProperty_perspective_origin: {
const nsStyleDisplay *styleDisplay =
static_cast<const nsStyleDisplay*>(styleStruct);
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
if (!StyleCoordToCSSValue(styleDisplay->mPerspectiveOrigin[0],
pair->mXValue) ||
!StyleCoordToCSSValue(styleDisplay->mPerspectiveOrigin[1],
pair->mYValue)) {
return false;
}
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
break;
}
case eCSSProperty_stroke_dasharray: {
const nsStyleSVG *svg = static_cast<const nsStyleSVG*>(styleStruct);
if (!svg->mStrokeDasharray.IsEmpty()) {
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = svg->mStrokeDasharray.Length();
i != i_end; ++i) {
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
const nsStyleCoord &coord = svg->mStrokeDasharray[i];
nsCSSValue &value = item->mValue;
switch (coord.GetUnit()) {
case eStyleUnit_Coord:
// Number means the same thing as length; we want to
// animate them the same way. Normalize both to number
// since it has more accuracy (float vs nscoord).
value.SetFloatValue(nsPresContext::
AppUnitsToFloatCSSPixels(coord.GetCoordValue()),
eCSSUnit_Number);
break;
case eStyleUnit_Factor:
value.SetFloatValue(coord.GetFactorValue(),
eCSSUnit_Number);
break;
case eStyleUnit_Percent:
value.SetPercentValue(coord.GetPercentValue());
break;
default:
MOZ_ASSERT(false, "unexpected unit");
return false;
}
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Dasharray);
} else if (svg->StrokeDasharrayFromObject()) {
// An empty dasharray with StrokeDasharrayFromObject() == true
// corresponds to the "context-value" keyword.
aComputedValue.SetIntValue(NS_STYLE_STROKE_PROP_CONTEXT_VALUE,
eUnit_Enumerated);
} else {
// Otherwise, an empty dasharray corresponds to the "none" keyword.
aComputedValue.SetNoneValue();
}
break;
}
case eCSSProperty_font_stretch: {
int16_t stretch =
static_cast<const nsStyleFont*>(styleStruct)->mFont.stretch;
static_assert(NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED == -4 &&
NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED == 4,
"font stretch constants not as expected");
if (stretch < NS_STYLE_FONT_STRETCH_ULTRA_CONDENSED ||
stretch > NS_STYLE_FONT_STRETCH_ULTRA_EXPANDED) {
return false;
}
aComputedValue.SetIntValue(stretch, eUnit_Enumerated);
return true;
}
case eCSSProperty_font_weight: {
uint16_t weight =
static_cast<const nsStyleFont*>(styleStruct)->mFont.weight;
if (weight % 100 != 0) {
return false;
}
aComputedValue.SetIntValue(weight, eUnit_Integer);
return true;
}
case eCSSProperty__moz_image_region: {
const nsStyleList *list =
static_cast<const nsStyleList*>(styleStruct);
const nsRect &srect = list->mImageRegion;
if (srect.IsEmpty()) {
aComputedValue.SetAutoValue();
break;
}
nsCSSRect *vrect = new nsCSSRect;
vrect->mLeft.SetIntegerCoordValue(srect.x);
vrect->mTop.SetIntegerCoordValue(srect.y);
vrect->mRight.SetIntegerCoordValue(srect.XMost());
vrect->mBottom.SetIntegerCoordValue(srect.YMost());
aComputedValue.SetAndAdoptCSSRectValue(vrect, eUnit_CSSRect);
break;
}
case eCSSProperty_clip: {
const nsStyleEffects* effects =
static_cast<const nsStyleEffects*>(styleStruct);
if (!(effects->mClipFlags & NS_STYLE_CLIP_RECT)) {
aComputedValue.SetAutoValue();
} else {
nsCSSRect *vrect = new nsCSSRect;
const nsRect &srect = effects->mClip;
if (effects->mClipFlags & NS_STYLE_CLIP_TOP_AUTO) {
vrect->mTop.SetAutoValue();
} else {
vrect->mTop.SetIntegerCoordValue(srect.y);
}
if (effects->mClipFlags & NS_STYLE_CLIP_RIGHT_AUTO) {
vrect->mRight.SetAutoValue();
} else {
vrect->mRight.SetIntegerCoordValue(srect.XMost());
}
if (effects->mClipFlags & NS_STYLE_CLIP_BOTTOM_AUTO) {
vrect->mBottom.SetAutoValue();
} else {
vrect->mBottom.SetIntegerCoordValue(srect.YMost());
}
if (effects->mClipFlags & NS_STYLE_CLIP_LEFT_AUTO) {
vrect->mLeft.SetAutoValue();
} else {
vrect->mLeft.SetIntegerCoordValue(srect.x);
}
aComputedValue.SetAndAdoptCSSRectValue(vrect, eUnit_CSSRect);
}
break;
}
case eCSSProperty_object_position: {
const nsStylePosition* stylePos =
static_cast<const nsStylePosition*>(styleStruct);
nsAutoPtr<nsCSSValue> val(new nsCSSValue);
SetPositionValue(stylePos->mObjectPosition, *val);
aComputedValue.SetAndAdoptCSSValueValue(val.forget(),
eUnit_ObjectPosition);
break;
}
case eCSSProperty_background_position_x: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleBackground*>(styleStruct)->mImage;
ExtractImageLayerPositionXList(layers, aComputedValue);
break;
}
case eCSSProperty_background_position_y: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleBackground*>(styleStruct)->mImage;
ExtractImageLayerPositionYList(layers, aComputedValue);
break;
}
#ifdef MOZ_ENABLE_MASK_AS_SHORTHAND
case eCSSProperty_mask_position_x: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleSVGReset*>(styleStruct)->mMask;
ExtractImageLayerPositionXList(layers, aComputedValue);
break;
}
case eCSSProperty_mask_position_y: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleSVGReset*>(styleStruct)->mMask;
ExtractImageLayerPositionYList(layers, aComputedValue);
break;
}
#endif
case eCSSProperty_background_size: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleBackground*>(styleStruct)->mImage;
ExtractImageLayerSizePairList(layers, aComputedValue);
break;
}
#ifdef MOZ_ENABLE_MASK_AS_SHORTHAND
case eCSSProperty_mask_size: {
const nsStyleImageLayers& layers =
static_cast<const nsStyleSVGReset*>(styleStruct)->mMask;
ExtractImageLayerSizePairList(layers, aComputedValue);
break;
}
#endif
case eCSSProperty_clip_path: {
const nsStyleSVGReset* svgReset =
static_cast<const nsStyleSVGReset*>(styleStruct);
const StyleClipPath& clipPath = svgReset->mClipPath;
const StyleShapeSourceType type = clipPath.GetType();
if (type == StyleShapeSourceType::URL) {
auto result = MakeUnique<nsCSSValue>();
result->SetURLValue(clipPath.GetURL());
aComputedValue.SetAndAdoptCSSValueValue(result.release(), eUnit_URL);
} else if (type == StyleShapeSourceType::Box) {
aComputedValue.SetIntValue(clipPath.GetReferenceBox(),
eUnit_Enumerated);
} else if (type == StyleShapeSourceType::Shape) {
RefPtr<nsCSSValue::Array> result = nsCSSValue::Array::Create(2);
if (!StyleClipBasicShapeToCSSArray(clipPath, result)) {
return false;
}
aComputedValue.SetCSSValueArrayValue(result, eUnit_Shape);
} else {
MOZ_ASSERT(type == StyleShapeSourceType::None, "unknown type");
aComputedValue.SetNoneValue();
}
break;
}
case eCSSProperty_filter: {
const nsStyleEffects* effects =
static_cast<const nsStyleEffects*>(styleStruct);
const nsTArray<nsStyleFilter>& filters = effects->mFilters;
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0; i < filters.Length(); ++i) {
nsCSSValueList *item = new nsCSSValueList;
*resultTail = item;
resultTail = &item->mNext;
const nsStyleFilter& filter = filters[i];
int32_t type = filter.GetType();
if (type == NS_STYLE_FILTER_URL) {
item->mValue.SetURLValue(filter.GetURL());
} else {
nsCSSKeyword functionName =
nsCSSProps::ValueToKeywordEnum(type,
nsCSSProps::kFilterFunctionKTable);
nsCSSValue::Array* filterArray =
item->mValue.InitFunction(functionName, 1);
if (type >= NS_STYLE_FILTER_BLUR && type <= NS_STYLE_FILTER_HUE_ROTATE) {
if (!StyleCoordToCSSValue(
filter.GetFilterParameter(),
filterArray->Item(1))) {
return false;
}
} else if (type == NS_STYLE_FILTER_DROP_SHADOW) {
nsCSSValueList* shadowResult = filterArray->Item(1).SetListValue();
nsAutoPtr<nsCSSValueList> tmpShadowValue;
nsCSSValueList **tmpShadowResultTail = getter_Transfers(tmpShadowValue);
nsCSSShadowArray* shadowArray = filter.GetDropShadow();
MOZ_ASSERT(shadowArray->Length() == 1,
"expected exactly one shadow");
AppendCSSShadowValue(shadowArray->ShadowAt(0), tmpShadowResultTail);
*shadowResult = *tmpShadowValue;
} else {
// We checked all possible nsStyleFilter types but
// NS_STYLE_FILTER_NULL before. We should never enter this path.
NS_NOTREACHED("no other filter functions defined");
return false;
}
}
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Filter);
break;
}
case eCSSProperty_transform: {
const nsStyleDisplay *display =
static_cast<const nsStyleDisplay*>(styleStruct);
nsAutoPtr<nsCSSValueList> result;
if (display->mSpecifiedTransform) {
// Clone, and convert all lengths (not percents) to pixels.
nsCSSValueList **resultTail = getter_Transfers(result);
for (const nsCSSValueList *l = display->mSpecifiedTransform->mHead;
l; l = l->mNext) {
nsCSSValueList *clone = new nsCSSValueList;
*resultTail = clone;
resultTail = &clone->mNext;
SubstitutePixelValues(aStyleContext, l->mValue, clone->mValue);
}
} else {
result = new nsCSSValueList();
result->mValue.SetNoneValue();
}
aComputedValue.SetTransformValue(
new nsCSSValueSharedList(result.forget()));
break;
}
case eCSSProperty_font_variation_settings: {
auto font = static_cast<const nsStyleFont*>(styleStruct);
UniquePtr<nsCSSValuePairList> result;
if (!font->mFont.fontVariationSettings.IsEmpty()) {
// Make a new list that clones the current settings
nsCSSValuePairList* tail = nullptr;
for (auto v : font->mFont.fontVariationSettings) {
auto clone = MakeUnique<nsCSSValuePairList>();
// OpenType font tags are stored in nsFont as 32-bit unsigned
// values, but represented in CSS as 4-character ASCII strings,
// beginning with the high byte of the value. So to clone the
// tag here, we append each of its 4 bytes to a string.
nsAutoString tagString;
tagString.Append(char(v.mTag >> 24));
tagString.Append(char(v.mTag >> 16));
tagString.Append(char(v.mTag >> 8));
tagString.Append(char(v.mTag));
clone->mXValue.SetStringValue(tagString, eCSSUnit_String);
clone->mYValue.SetFloatValue(v.mValue, eCSSUnit_Number);
AppendToCSSValuePairList(result, Move(clone), &tail);
}
aComputedValue.SetAndAdoptCSSValuePairListValue(result.release());
} else {
aComputedValue.SetNormalValue();
}
break;
}
default:
MOZ_ASSERT(false, "missing property implementation");
return false;
};
return true;
case eStyleAnimType_Coord: {
const nsStyleCoord& coord =
StyleDataAtOffset<nsStyleCoord>(styleStruct, ssOffset);
if (nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_NUMBERS_ARE_PIXELS) &&
coord.GetUnit() == eStyleUnit_Coord) {
// For SVG properties where number means the same thing as length,
// we want to animate them the same way. Normalize both to number
// since it has more accuracy (float vs nscoord).
aComputedValue.SetFloatValue(nsPresContext::
AppUnitsToFloatCSSPixels(coord.GetCoordValue()));
return true;
}
return StyleCoordToValue(coord, aComputedValue);
}
case eStyleAnimType_Sides_Top:
case eStyleAnimType_Sides_Right:
case eStyleAnimType_Sides_Bottom:
case eStyleAnimType_Sides_Left: {
static_assert(
eSideTop == eStyleAnimType_Sides_Top -eStyleAnimType_Sides_Top &&
eSideRight == eStyleAnimType_Sides_Right -eStyleAnimType_Sides_Top &&
eSideBottom == eStyleAnimType_Sides_Bottom-eStyleAnimType_Sides_Top &&
eSideLeft == eStyleAnimType_Sides_Left -eStyleAnimType_Sides_Top,
"box side constants out of sync with animation side constants");
const nsStyleCoord &coord =
StyleDataAtOffset<nsStyleSides>(styleStruct, ssOffset).
Get(mozilla::Side(animType - eStyleAnimType_Sides_Top));
return StyleCoordToValue(coord, aComputedValue);
}
case eStyleAnimType_Corner_TopLeft:
case eStyleAnimType_Corner_TopRight:
case eStyleAnimType_Corner_BottomRight:
case eStyleAnimType_Corner_BottomLeft: {
static_assert(
NS_CORNER_TOP_LEFT == eStyleAnimType_Corner_TopLeft -
eStyleAnimType_Corner_TopLeft &&
NS_CORNER_TOP_RIGHT == eStyleAnimType_Corner_TopRight -
eStyleAnimType_Corner_TopLeft &&
NS_CORNER_BOTTOM_RIGHT == eStyleAnimType_Corner_BottomRight -
eStyleAnimType_Corner_TopLeft &&
NS_CORNER_BOTTOM_LEFT == eStyleAnimType_Corner_BottomLeft -
eStyleAnimType_Corner_TopLeft,
"box corner constants out of sync with animation corner constants");
const nsStyleCorners& corners =
StyleDataAtOffset<nsStyleCorners>(styleStruct, ssOffset);
uint8_t fullCorner = animType - eStyleAnimType_Corner_TopLeft;
const nsStyleCoord &horiz =
corners.Get(NS_FULL_TO_HALF_CORNER(fullCorner, false));
const nsStyleCoord &vert =
corners.Get(NS_FULL_TO_HALF_CORNER(fullCorner, true));
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
if (!StyleCoordToCSSValue(horiz, pair->mXValue) ||
!StyleCoordToCSSValue(vert, pair->mYValue)) {
return false;
}
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
return true;
}
case eStyleAnimType_nscoord:
aComputedValue.SetCoordValue(
StyleDataAtOffset<nscoord>(styleStruct, ssOffset));
return true;
case eStyleAnimType_float:
aComputedValue.SetFloatValue(
StyleDataAtOffset<float>(styleStruct, ssOffset));
if (aProperty == eCSSProperty_font_size_adjust &&
aComputedValue.GetFloatValue() == -1.0f) {
// In nsStyleFont, we set mFont.sizeAdjust to -1.0 to represent
// font-size-adjust: none. Here, we have to treat this as a keyword
// instead of a float value, to make sure we don't end up doing
// interpolation with it.
aComputedValue.SetNoneValue();
}
return true;
case eStyleAnimType_Color:
aComputedValue.SetColorValue(
StyleDataAtOffset<nscolor>(styleStruct, ssOffset));
return true;
case eStyleAnimType_ComplexColor: {
auto& color = StyleDataAtOffset<StyleComplexColor>(styleStruct, ssOffset);
if (color.mIsAuto) {
aComputedValue.SetAutoValue();
} else {
aComputedValue.SetComplexColorValue(color);
}
return true;
}
case eStyleAnimType_PaintServer: {
const nsStyleSVGPaint& paint =
StyleDataAtOffset<nsStyleSVGPaint>(styleStruct, ssOffset);
switch (paint.Type()) {
case eStyleSVGPaintType_Color:
aComputedValue.SetColorValue(paint.GetColor());
return true;
case eStyleSVGPaintType_Server: {
css::URLValue* url = paint.GetPaintServer();
if (!url) {
NS_WARNING("Null paint server");
return false;
}
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
pair->mXValue.SetURLValue(url);
pair->mYValue.SetColorValue(paint.GetFallbackColor());
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
return true;
}
case eStyleSVGPaintType_ContextFill:
case eStyleSVGPaintType_ContextStroke: {
nsAutoPtr<nsCSSValuePair> pair(new nsCSSValuePair);
pair->mXValue.SetIntValue(paint.Type() == eStyleSVGPaintType_ContextFill ?
NS_COLOR_CONTEXT_FILL : NS_COLOR_CONTEXT_STROKE,
eCSSUnit_Enumerated);
pair->mYValue.SetColorValue(paint.GetFallbackColor());
aComputedValue.SetAndAdoptCSSValuePairValue(pair.forget(),
eUnit_CSSValuePair);
return true;
}
default:
MOZ_ASSERT(paint.Type() == eStyleSVGPaintType_None,
"Unexpected SVG paint type");
aComputedValue.SetNoneValue();
return true;
}
}
case eStyleAnimType_Shadow: {
const nsCSSShadowArray* shadowArray =
StyleDataAtOffset<RefPtr<nsCSSShadowArray>>(styleStruct, ssOffset);
if (!shadowArray) {
aComputedValue.SetAndAdoptCSSValueListValue(nullptr, eUnit_Shadow);
return true;
}
nsAutoPtr<nsCSSValueList> result;
nsCSSValueList **resultTail = getter_Transfers(result);
for (uint32_t i = 0, i_end = shadowArray->Length(); i < i_end; ++i) {
AppendCSSShadowValue(shadowArray->ShadowAt(i), resultTail);
}
aComputedValue.SetAndAdoptCSSValueListValue(result.forget(),
eUnit_Shadow);
return true;
}
case eStyleAnimType_Discrete: {
if (aProperty == eCSSProperty_visibility) {
aComputedValue.SetIntValue(
static_cast<const nsStyleVisibility*>(styleStruct)->mVisible,
eUnit_Visibility);
return true;
}
if (aStyleContext->StyleSource().IsServoComputedValues()) {
NS_ERROR("stylo: extracting discretely animated values not supported");
return false;
}
auto cssValue = MakeUnique<nsCSSValue>(eCSSUnit_Unset);
aStyleContext->RuleNode()->GetDiscretelyAnimatedCSSValue(aProperty,
cssValue.get());
aComputedValue.SetAndAdoptCSSValueValue(cssValue.release(),
eUnit_DiscreteCSSValue);
return true;
}
case eStyleAnimType_None:
NS_NOTREACHED("shouldn't use on non-animatable properties");
}
return false;
}
gfxSize
StyleAnimationValue::GetScaleValue(const nsIFrame* aForFrame) const
{
MOZ_ASSERT(aForFrame);
MOZ_ASSERT(GetUnit() == StyleAnimationValue::eUnit_Transform);
nsCSSValueSharedList* list = GetCSSValueSharedListValue();
MOZ_ASSERT(list->mHead);
RuleNodeCacheConditions dontCare;
bool dontCareBool;
nsStyleTransformMatrix::TransformReferenceBox refBox(aForFrame);
Matrix4x4 transform = nsStyleTransformMatrix::ReadTransforms(
list->mHead,
aForFrame->StyleContext(),
aForFrame->PresContext(), dontCare, refBox,
aForFrame->PresContext()->AppUnitsPerDevPixel(),
&dontCareBool);
Matrix transform2d;
bool canDraw2D = transform.CanDraw2D(&transform2d);
if (!canDraw2D) {
return gfxSize();
}
return ThebesMatrix(transform2d).ScaleFactors(true);
}
StyleAnimationValue::StyleAnimationValue(int32_t aInt, Unit aUnit,
IntegerConstructorType)
{
NS_ASSERTION(IsIntUnit(aUnit), "unit must be of integer type");
mUnit = aUnit;
mValue.mInt = aInt;
}
StyleAnimationValue::StyleAnimationValue(nscoord aLength, CoordConstructorType)
{
mUnit = eUnit_Coord;
mValue.mCoord = aLength;
}
StyleAnimationValue::StyleAnimationValue(float aPercent,
PercentConstructorType)
{
mUnit = eUnit_Percent;
mValue.mFloat = aPercent;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
StyleAnimationValue::StyleAnimationValue(float aFloat, FloatConstructorType)
{
mUnit = eUnit_Float;
mValue.mFloat = aFloat;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
StyleAnimationValue::StyleAnimationValue(nscolor aColor, ColorConstructorType)
{
mUnit = eUnit_Color;
mValue.mCSSValue = new nsCSSValue();
mValue.mCSSValue->SetColorValue(aColor);
}
StyleAnimationValue&
StyleAnimationValue::operator=(const StyleAnimationValue& aOther)
{
if (this == &aOther) {
return *this;
}
FreeValue();
mUnit = aOther.mUnit;
switch (mUnit) {
case eUnit_Null:
case eUnit_Normal:
case eUnit_Auto:
case eUnit_None:
case eUnit_CurrentColor:
break;
case eUnit_Enumerated:
case eUnit_Visibility:
case eUnit_Integer:
mValue.mInt = aOther.mValue.mInt;
break;
case eUnit_Coord:
mValue.mCoord = aOther.mValue.mCoord;
break;
case eUnit_Percent:
case eUnit_Float:
mValue.mFloat = aOther.mValue.mFloat;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
break;
case eUnit_Calc:
case eUnit_Color:
case eUnit_ObjectPosition:
case eUnit_URL:
case eUnit_DiscreteCSSValue:
MOZ_ASSERT(IsCSSValueUnit(mUnit),
"This clause is for handling nsCSSValue-backed units");
MOZ_ASSERT(aOther.mValue.mCSSValue, "values may not be null");
mValue.mCSSValue = new nsCSSValue(*aOther.mValue.mCSSValue);
break;
case eUnit_CSSValuePair:
MOZ_ASSERT(aOther.mValue.mCSSValuePair,
"value pairs may not be null");
mValue.mCSSValuePair = new nsCSSValuePair(*aOther.mValue.mCSSValuePair);
break;
case eUnit_CSSValueTriplet:
MOZ_ASSERT(aOther.mValue.mCSSValueTriplet,
"value triplets may not be null");
mValue.mCSSValueTriplet = new nsCSSValueTriplet(*aOther.mValue.mCSSValueTriplet);
break;
case eUnit_CSSRect:
MOZ_ASSERT(aOther.mValue.mCSSRect, "rects may not be null");
mValue.mCSSRect = new nsCSSRect(*aOther.mValue.mCSSRect);
break;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Filter:
case eUnit_BackgroundPositionCoord:
MOZ_ASSERT(mUnit == eUnit_Shadow || mUnit == eUnit_Filter ||
aOther.mValue.mCSSValueList,
"value lists other than shadows and filters may not be null");
if (aOther.mValue.mCSSValueList) {
mValue.mCSSValueList = aOther.mValue.mCSSValueList->Clone();
} else {
mValue.mCSSValueList = nullptr;
}
break;
case eUnit_Shape:
MOZ_ASSERT(aOther.mValue.mCSSValueArray,
"value arrays may not be null");
mValue.mCSSValueArray = aOther.mValue.mCSSValueArray;
mValue.mCSSValueArray->AddRef();
break;
case eUnit_Transform:
mValue.mCSSValueSharedList = aOther.mValue.mCSSValueSharedList;
mValue.mCSSValueSharedList->AddRef();
break;
case eUnit_CSSValuePairList:
MOZ_ASSERT(aOther.mValue.mCSSValuePairList,
"value pair lists may not be null");
mValue.mCSSValuePairList = aOther.mValue.mCSSValuePairList->Clone();
break;
case eUnit_UnparsedString:
MOZ_ASSERT(aOther.mValue.mString, "expecting non-null string");
mValue.mString = aOther.mValue.mString;
mValue.mString->AddRef();
break;
case eUnit_ComplexColor:
MOZ_ASSERT(aOther.mValue.mComplexColor);
mValue.mComplexColor = aOther.mValue.mComplexColor;
mValue.mComplexColor->AddRef();
break;
}
return *this;
}
void
StyleAnimationValue::SetNormalValue()
{
FreeValue();
mUnit = eUnit_Normal;
}
void
StyleAnimationValue::SetAutoValue()
{
FreeValue();
mUnit = eUnit_Auto;
}
void
StyleAnimationValue::SetNoneValue()
{
FreeValue();
mUnit = eUnit_None;
}
void
StyleAnimationValue::SetIntValue(int32_t aInt, Unit aUnit)
{
NS_ASSERTION(IsIntUnit(aUnit), "unit must be of integer type");
FreeValue();
mUnit = aUnit;
mValue.mInt = aInt;
}
void
StyleAnimationValue::SetCoordValue(nscoord aLength)
{
FreeValue();
mUnit = eUnit_Coord;
mValue.mCoord = aLength;
}
void
StyleAnimationValue::SetPercentValue(float aPercent)
{
FreeValue();
mUnit = eUnit_Percent;
mValue.mFloat = aPercent;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
void
StyleAnimationValue::SetFloatValue(float aFloat)
{
FreeValue();
mUnit = eUnit_Float;
mValue.mFloat = aFloat;
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
}
void
StyleAnimationValue::SetColorValue(nscolor aColor)
{
FreeValue();
mUnit = eUnit_Color;
mValue.mCSSValue = new nsCSSValue();
mValue.mCSSValue->SetColorValue(aColor);
}
void
StyleAnimationValue::SetCurrentColorValue()
{
FreeValue();
mUnit = eUnit_CurrentColor;
}
void
StyleAnimationValue::SetComplexColorValue(const StyleComplexColor& aColor)
{
if (aColor.mIsAuto) {
SetAutoValue();
} else if (aColor.IsCurrentColor()) {
SetCurrentColorValue();
} else if (aColor.IsNumericColor()) {
SetColorValue(aColor.mColor);
} else {
SetComplexColorValue(do_AddRef(new ComplexColorValue(aColor)));
}
}
void
StyleAnimationValue::SetComplexColorValue(
already_AddRefed<ComplexColorValue> aValue)
{
FreeValue();
mUnit = eUnit_ComplexColor;
mValue.mComplexColor = aValue.take();
}
void
StyleAnimationValue::SetUnparsedStringValue(const nsString& aString)
{
FreeValue();
mUnit = eUnit_UnparsedString;
mValue.mString = nsCSSValue::BufferFromString(aString).take();
}
void
StyleAnimationValue::SetAndAdoptCSSValueValue(nsCSSValue *aValue,
Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSValueUnit(aUnit), "bad unit");
MOZ_ASSERT(aValue != nullptr, "values may not be null");
mUnit = aUnit;
mValue.mCSSValue = aValue; // take ownership
}
void
StyleAnimationValue::SetAndAdoptCSSValuePairValue(nsCSSValuePair *aValuePair,
Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSValuePairUnit(aUnit), "bad unit");
MOZ_ASSERT(aValuePair != nullptr, "value pairs may not be null");
mUnit = aUnit;
mValue.mCSSValuePair = aValuePair; // take ownership
}
void
StyleAnimationValue::SetAndAdoptCSSValueTripletValue(
nsCSSValueTriplet *aValueTriplet, Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSValueTripletUnit(aUnit), "bad unit");
MOZ_ASSERT(aValueTriplet != nullptr, "value pairs may not be null");
mUnit = aUnit;
mValue.mCSSValueTriplet = aValueTriplet; // take ownership
}
void
StyleAnimationValue::SetAndAdoptCSSRectValue(nsCSSRect *aRect, Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSRectUnit(aUnit), "bad unit");
MOZ_ASSERT(aRect != nullptr, "value pairs may not be null");
mUnit = aUnit;
mValue.mCSSRect = aRect; // take ownership
}
void
StyleAnimationValue::SetCSSValueArrayValue(nsCSSValue::Array* aValue,
Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSValueArrayUnit(aUnit), "bad unit");
MOZ_ASSERT(aValue != nullptr,
"not currently expecting any arrays to be null");
mUnit = aUnit;
mValue.mCSSValueArray = aValue;
mValue.mCSSValueArray->AddRef();
}
void
StyleAnimationValue::SetAndAdoptCSSValueListValue(nsCSSValueList *aValueList,
Unit aUnit)
{
FreeValue();
MOZ_ASSERT(IsCSSValueListUnit(aUnit), "bad unit");
MOZ_ASSERT(aUnit == eUnit_Shadow || aUnit == eUnit_Filter ||
aValueList != nullptr,
"value lists other than shadows and filters may not be null");
mUnit = aUnit;
mValue.mCSSValueList = aValueList; // take ownership
}
void
StyleAnimationValue::SetTransformValue(nsCSSValueSharedList* aList)
{
FreeValue();
mUnit = eUnit_Transform;
mValue.mCSSValueSharedList = aList;
mValue.mCSSValueSharedList->AddRef();
}
void
StyleAnimationValue::SetAndAdoptCSSValuePairListValue(
nsCSSValuePairList *aValuePairList)
{
FreeValue();
MOZ_ASSERT(aValuePairList, "may not be null");
mUnit = eUnit_CSSValuePairList;
mValue.mCSSValuePairList = aValuePairList; // take ownership
}
void
StyleAnimationValue::FreeValue()
{
if (IsCSSValueUnit(mUnit)) {
delete mValue.mCSSValue;
} else if (IsCSSValueListUnit(mUnit)) {
delete mValue.mCSSValueList;
} else if (IsCSSValueSharedListValue(mUnit)) {
mValue.mCSSValueSharedList->Release();
} else if (IsCSSValuePairUnit(mUnit)) {
delete mValue.mCSSValuePair;
} else if (IsCSSValueTripletUnit(mUnit)) {
delete mValue.mCSSValueTriplet;
} else if (IsCSSRectUnit(mUnit)) {
delete mValue.mCSSRect;
} else if (IsCSSValuePairListUnit(mUnit)) {
delete mValue.mCSSValuePairList;
} else if (IsCSSValueArrayUnit(mUnit)) {
mValue.mCSSValueArray->Release();
} else if (IsStringUnit(mUnit)) {
MOZ_ASSERT(mValue.mString, "expecting non-null string");
mValue.mString->Release();
} else if (mUnit == eUnit_ComplexColor) {
mValue.mComplexColor->Release();
}
}
bool
StyleAnimationValue::operator==(const StyleAnimationValue& aOther) const
{
if (mUnit != aOther.mUnit) {
return false;
}
switch (mUnit) {
case eUnit_Null:
case eUnit_Normal:
case eUnit_Auto:
case eUnit_None:
case eUnit_CurrentColor:
return true;
case eUnit_Enumerated:
case eUnit_Visibility:
case eUnit_Integer:
return mValue.mInt == aOther.mValue.mInt;
case eUnit_Coord:
return mValue.mCoord == aOther.mValue.mCoord;
case eUnit_Percent:
case eUnit_Float:
return mValue.mFloat == aOther.mValue.mFloat;
case eUnit_Calc:
case eUnit_Color:
case eUnit_ObjectPosition:
case eUnit_URL:
case eUnit_DiscreteCSSValue:
MOZ_ASSERT(IsCSSValueUnit(mUnit),
"This clause is for handling nsCSSValue-backed units");
return *mValue.mCSSValue == *aOther.mValue.mCSSValue;
case eUnit_CSSValuePair:
return *mValue.mCSSValuePair == *aOther.mValue.mCSSValuePair;
case eUnit_CSSValueTriplet:
return *mValue.mCSSValueTriplet == *aOther.mValue.mCSSValueTriplet;
case eUnit_CSSRect:
return *mValue.mCSSRect == *aOther.mValue.mCSSRect;
case eUnit_Dasharray:
case eUnit_Shadow:
case eUnit_Filter:
case eUnit_BackgroundPositionCoord:
return nsCSSValueList::Equal(mValue.mCSSValueList,
aOther.mValue.mCSSValueList);
case eUnit_Shape:
return *mValue.mCSSValueArray == *aOther.mValue.mCSSValueArray;
case eUnit_Transform:
return *mValue.mCSSValueSharedList == *aOther.mValue.mCSSValueSharedList;
case eUnit_CSSValuePairList:
return nsCSSValuePairList::Equal(mValue.mCSSValuePairList,
aOther.mValue.mCSSValuePairList);
case eUnit_UnparsedString:
return (NS_strcmp(GetStringBufferValue(),
aOther.GetStringBufferValue()) == 0);
case eUnit_ComplexColor:
return *mValue.mComplexColor == *aOther.mValue.mComplexColor;
}
NS_NOTREACHED("incomplete case");
return false;
}
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