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diff --git a/layout/style/StyleAnimationValue.cpp b/layout/style/StyleAnimationValue.cpp
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+++ b/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
+TransformFunctionsMatch(nsCSSKeyword func1, nsCSSKeyword func2)
+{
+ return ToPrimitive(func1) == ToPrimitive(func2);
+}
+
+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_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);
+}
+
+// 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);
+ }
+}
+
+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 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 double
+ComputeShapeDistance(nsCSSPropertyID aProperty,
+ const nsCSSValue::Array* aArray1,
+ const nsCSSValue::Array* aArray2)
+{
+ // 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 0.0;
+ }
+
+ // 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");
+ }
+ return sqrt(squareDistance);
+}
+
+static nsCSSValueList*
+AddTransformLists(double aCoeff1, const nsCSSValueList* aList1,
+ double aCoeff2, const nsCSSValueList* aList2);
+
+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.
+
+ using nsStyleTransformMatrix::ApplyPerspectiveToMatrix;
+ Matrix4x4 m1;
+ ApplyPerspectiveToMatrix(m1, a1->Item(1).GetFloatValue());
+ Matrix4x4 m2;
+ ApplyPerspectiveToMatrix(m2, 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:
+ 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();
+
+ double squareDistance = 0.0;
+ MOZ_ASSERT(!shadow1 == !shadow2, "lists should be same length");
+ while (shadow1) {
+ nsCSSValue::Array *array1 = shadow1->mValue.GetArrayValue();
+ nsCSSValue::Array *array2 = shadow2->mValue.GetArrayValue();
+ 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;
+ }
+
+ const nsCSSValue &color1 = array1->Item(4);
+ const nsCSSValue &color2 = array2->Item(4);
+#ifdef DEBUG
+ {
+ const nsCSSValue &inset1 = array1->Item(5);
+ const nsCSSValue &inset2 = array2->Item(5);
+ // There are only two possible states of the inset value:
+ // (1) GetUnit() == eCSSUnit_Null
+ // (2) GetUnit() == eCSSUnit_Enumerated &&
+ // GetIntValue() == NS_STYLE_BOX_SHADOW_INSET
+ MOZ_ASSERT(((color1.IsNumericColorUnit() &&
+ color2.IsNumericColorUnit()) ||
+ (color1.GetUnit() == color2.GetUnit())) &&
+ inset1 == inset2,
+ "AddWeighted should have failed");
+ }
+#endif
+
+ if (color1.GetUnit() != eCSSUnit_Null) {
+ double colorDistance = ComputeColorDistance(color1.GetColorValue(),
+ color2.GetColorValue());
+ squareDistance += colorDistance * colorDistance;
+ }
+
+ shadow1 = shadow1->mNext;
+ shadow2 = shadow2->mNext;
+ MOZ_ASSERT(!shadow1 == !shadow2, "lists should be same length");
+ }
+ aDistance = sqrt(squareDistance);
+ return true;
+ }
+ case eUnit_Shape:
+ aDistance = ComputeShapeDistance(aProperty,
+ aStartValue.GetCSSValueArrayValue(),
+ aEndValue.GetCSSValueArrayValue());
+ return true;
+
+ case eUnit_Filter:
+ // Bug 1286151: Support paced animations for filter function
+ // interpolation.
+ return false;
+
+ 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 {
+ 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)) {
+ break;
+ }
+
+ item1 = item1->mNext;
+ item2 = item2->mNext;
+ } while (item1 && item2);
+
+ if (item1 || item2) {
+ // Either the transform function types don't match or
+ // the lengths don't match.
+ aDistance =
+ ComputeMismatchedTransfromListDistance(list1, list2, aStyleContext);
+ } else {
+ aDistance = ComputeTransformListDistance(list1, list2);
+ }
+ }
+ 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_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);
+}
+
+enum class ColorAdditionType {
+ Clamped, // Clamp each color channel after adding.
+ Unclamped // Do not clamp color channels after adding.
+};
+
+// 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);
+}
+
+// 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();
+ }
+}
+
+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();
+}
+
+template<typename T>
+T InterpolateNumerically(const T& aOne, const T& aTwo, double aCoeff)
+{
+ return aOne + (aTwo - aOne) * aCoeff;
+}
+
+
+/* static */ Matrix4x4
+StyleAnimationValue::InterpolateTransformMatrix(const Matrix4x4 &aMatrix1,
+ const Matrix4x4 &aMatrix2,
+ double aProgress)
+{
+ // Decompose both matrices
+
+ // TODO: What do we do if one of these returns false (singular matrix)
+ Point3D scale1(1, 1, 1), translate1;
+ Point4D perspective1(0, 0, 0, 1);
+ gfxQuaternion rotate1;
+ nsStyleTransformMatrix::ShearArray shear1{0.0f, 0.0f, 0.0f};
+
+ Point3D scale2(1, 1, 1), translate2;
+ Point4D perspective2(0, 0, 0, 1);
+ gfxQuaternion rotate2;
+ nsStyleTransformMatrix::ShearArray shear2{0.0f, 0.0f, 0.0f};
+
+ Matrix matrix2d1, matrix2d2;
+ if (aMatrix1.Is2D(&matrix2d1) && aMatrix2.Is2D(&matrix2d2)) {
+ Decompose2DMatrix(matrix2d1, scale1, shear1, rotate1, translate1);
+ Decompose2DMatrix(matrix2d2, scale2, shear2, rotate2, translate2);
+ } else {
+ Decompose3DMatrix(aMatrix1, scale1, shear1,
+ rotate1, translate1, perspective1);
+ Decompose3DMatrix(aMatrix2, scale2, shear2,
+ rotate2, translate2, perspective2);
+ }
+
+ // Interpolate each of the pieces
+ Matrix4x4 result;
+
+ Point4D perspective =
+ InterpolateNumerically(perspective1, perspective2, aProgress);
+ result.SetTransposedVector(3, perspective);
+
+ Point3D translate =
+ InterpolateNumerically(translate1, translate2, aProgress);
+ result.PreTranslate(translate.x, translate.y, translate.z);
+
+ gfxQuaternion q3 = rotate1.Slerp(rotate2, aProgress);
+ Matrix4x4 rotate = q3.ToMatrix();
+ if (!rotate.IsIdentity()) {
+ result = rotate * result;
+ }
+
+ // TODO: Would it be better to interpolate these as angles?
+ // How do we convert back to angles?
+ float yzshear =
+ InterpolateNumerically(shear1[ShearType::YZSHEAR],
+ shear2[ShearType::YZSHEAR],
+ aProgress);
+ if (yzshear != 0.0) {
+ result.SkewYZ(yzshear);
+ }
+
+ float xzshear =
+ InterpolateNumerically(shear1[ShearType::XZSHEAR],
+ shear2[ShearType::XZSHEAR],
+ aProgress);
+ if (xzshear != 0.0) {
+ result.SkewXZ(xzshear);
+ }
+
+ float xyshear =
+ InterpolateNumerically(shear1[ShearType::XYSHEAR],
+ shear2[ShearType::XYSHEAR],
+ aProgress);
+ if (xyshear != 0.0) {
+ result.SkewXY(xyshear);
+ }
+
+ Point3D scale =
+ InterpolateNumerically(scale1, scale2, aProgress);
+ if (scale != Point3D(1.0, 1.0, 1.0)) {
+ result.PreScale(scale.x, scale.y, scale.z);
+ }
+
+ return result;
+}
+
+static nsCSSValueList*
+AddDifferentTransformLists(double aCoeff1, const nsCSSValueList* aList1,
+ double aCoeff2, const nsCSSValueList* aList2)
+{
+ nsAutoPtr<nsCSSValueList> result;
+ nsCSSValueList **resultTail = getter_Transfers(result);
+
+ RefPtr<nsCSSValue::Array> arr;
+ arr =
+ StyleAnimationValue::AppendTransformFunction(eCSSKeyword_interpolatematrix,
+ 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();
+ } 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 (!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)
+{
+ 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);
+ } else {
+ *resultTail =
+ AddDifferentTransformLists(aCoeff1, &tempList1, aCoeff2, &tempList2);
+ }
+
+ // Now advance resultTail to point to the new tail slot.
+ while (*resultTail) {
+ resultTail = &(*resultTail)->mNext;
+ }
+
+ break;
+ }
+ default:
+ MOZ_ASSERT(false, "unknown transform function");
+ }
+
+ 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 {
+ result = AddTransformLists(0, list2, aCoeff2, list2);
+ }
+ } else {
+ if (list2->mValue.GetUnit() == eCSSUnit_None) {
+ result = AddTransformLists(0, list1, aCoeff1, list1);
+ } else {
+ bool match = true;
+
+ {
+ 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)) {
+ break;
+ }
+
+ item1 = item1->mNext;
+ item2 = item2->mNext;
+ } while (item1 && item2);
+ if (item1 || item2) {
+ // Either |break| above or length mismatch.
+ match = false;
+ }
+ }
+
+ if (match) {
+ result = AddTransformLists(aCoeff1, list1, aCoeff2, list2);
+ } else {
+ result = AddDifferentTransformLists(aCoeff1, list1, aCoeff2, list2);
+ }
+ }
+ }
+
+ 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;
+}
+
+bool
+StyleAnimationValue::Accumulate(nsCSSPropertyID aProperty,
+ StyleAnimationValue& aDest,
+ const StyleAnimationValue& aValueToAccumulate,
+ uint64_t aCount)
+{
+ Unit commonUnit =
+ GetCommonUnit(aProperty, aDest.GetUnit(), aValueToAccumulate.GetUnit());
+ switch (commonUnit) {
+ case eUnit_Filter: {
+ UniquePtr<nsCSSValueList> result =
+ AddWeightedFilterList(1.0, aDest.GetCSSValueListValue(),
+ aCount, aValueToAccumulate.GetCSSValueListValue(),
+ ColorAdditionType::Unclamped);
+ if (!result) {
+ return false;
+ }
+
+ aDest.SetAndAdoptCSSValueListValue(result.release(), eUnit_Filter);
+ return true;
+ }
+ case eUnit_Shadow: {
+ UniquePtr<nsCSSValueList> result =
+ AddWeightedShadowList(1.0, aDest.GetCSSValueListValue(),
+ aCount, aValueToAccumulate.GetCSSValueListValue(),
+ ColorAdditionType::Unclamped);
+ if (!result) {
+ return false;
+ }
+ aDest.SetAndAdoptCSSValueListValue(result.release(), eUnit_Shadow);
+ return true;
+ }
+ case eUnit_Color: {
+ RGBAColorData color1 = ExtractColor(aDest);
+ RGBAColorData color2 = ExtractColor(aValueToAccumulate);
+ auto resultColor = MakeUnique<nsCSSValue>();
+ resultColor->SetRGBAColorValue(
+ AddWeightedColors(1.0, color1, aCount, color2));
+ aDest.SetAndAdoptCSSValueValue(resultColor.release(), eUnit_Color);
+ return true;
+ }
+ default:
+ return Add(aProperty, aDest, aValueToAccumulate, aCount);
+ }
+ MOZ_ASSERT_UNREACHABLE("Can't accumulate using the given common unit");
+ return false;
+}
+
+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_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;
+ }
+
+ 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(
+ NS_SIDE_TOP == eStyleAnimType_Sides_Top -eStyleAnimType_Sides_Top &&
+ NS_SIDE_RIGHT == eStyleAnimType_Sides_Right -eStyleAnimType_Sides_Top &&
+ NS_SIDE_BOTTOM == eStyleAnimType_Sides_Bottom-eStyleAnimType_Sides_Top &&
+ NS_SIDE_LEFT == 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::css::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: {
+ aComputedValue.SetComplexColorValue(
+ StyleDataAtOffset<StyleComplexColor>(styleStruct, ssOffset));
+ 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;
+ }
+ 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.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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-10 06:45:52 +0000