зеркало из https://github.com/mozilla/gecko-dev.git
659 строки
23 KiB
C++
659 строки
23 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* representation of a value for a SMIL-animated CSS property */
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#include "nsSMILCSSValueType.h"
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#include "nsComputedDOMStyle.h"
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#include "nsString.h"
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#include "nsSMILParserUtils.h"
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#include "nsSMILValue.h"
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#include "nsCSSProps.h"
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#include "nsCSSValue.h"
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#include "nsColor.h"
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#include "nsPresContext.h"
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#include "mozilla/Keyframe.h" // For PropertyValuePair
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#include "mozilla/ServoBindings.h"
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#include "mozilla/ServoComputedValuesWithParent.h"
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#include "mozilla/StyleAnimationValue.h" // For AnimationValue
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#include "mozilla/StyleSetHandleInlines.h"
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#include "mozilla/dom/Element.h"
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#include "nsDebug.h"
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#include "nsStyleUtil.h"
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#include "nsIDocument.h"
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using namespace mozilla::dom;
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using mozilla::StyleAnimationValue;
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/*static*/ nsSMILCSSValueType nsSMILCSSValueType::sSingleton;
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struct ValueWrapper {
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ValueWrapper(nsCSSPropertyID aPropID, const AnimationValue& aValue)
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: mPropID(aPropID), mCSSValue(aValue) {}
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ValueWrapper(nsCSSPropertyID aPropID, const StyleAnimationValue& aValue)
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: mPropID(aPropID), mCSSValue(aValue) {}
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ValueWrapper(nsCSSPropertyID aPropID,
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const RefPtr<RawServoAnimationValue>& aValue)
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: mPropID(aPropID), mCSSValue(aValue) {}
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nsCSSPropertyID mPropID;
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AnimationValue mCSSValue;
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};
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// Helper Methods
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// --------------
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static const AnimationValue*
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GetZeroValueForUnit(StyleAnimationValue::Unit aUnit)
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{
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static const AnimationValue sZeroCoord(
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StyleAnimationValue(0, StyleAnimationValue::CoordConstructor));
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static const AnimationValue sZeroPercent(
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StyleAnimationValue(0.0f, StyleAnimationValue::PercentConstructor));
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static const AnimationValue sZeroFloat(
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StyleAnimationValue(0.0f, StyleAnimationValue::FloatConstructor));
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static const AnimationValue sZeroColor(
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StyleAnimationValue(NS_RGB(0,0,0), StyleAnimationValue::ColorConstructor));
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MOZ_ASSERT(aUnit != StyleAnimationValue::eUnit_Null,
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"Need non-null unit for a zero value");
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switch (aUnit) {
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case StyleAnimationValue::eUnit_Coord:
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return &sZeroCoord;
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case StyleAnimationValue::eUnit_Percent:
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return &sZeroPercent;
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case StyleAnimationValue::eUnit_Float:
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return &sZeroFloat;
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case StyleAnimationValue::eUnit_Color:
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return &sZeroColor;
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default:
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return nullptr;
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}
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}
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// This method requires at least one of its arguments to be non-null.
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//
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// If one argument is null, this method updates it to point to "zero"
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// for the other argument's Unit (if applicable; otherwise, we return false).
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//
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// If neither argument is null, this method generally does nothing, though it
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// may apply a workaround for the special case where a 0 length-value is mixed
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// with a eUnit_Float value. (See comment below.)
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//
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// Returns true on success, or false.
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static bool
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FinalizeStyleAnimationValues(const AnimationValue*& aValue1,
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const AnimationValue*& aValue2)
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{
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MOZ_ASSERT(aValue1 || aValue2,
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"expecting at least one non-null value");
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MOZ_ASSERT(!aValue1 || !aValue2 || !aValue1->mServo == !aValue2->mServo,
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"If both values are specified, they should be for the same"
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" style system");
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bool isServo = aValue1 ? aValue1->mServo : aValue2->mServo;
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if (isServo) {
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// Bug 1355349: Implement additive animation for Stylo
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if (!aValue1 || !aValue2) {
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NS_WARNING("stylo: Missing values are not yet supported (bug 1355349)");
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return false;
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}
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return true;
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}
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// Are we missing either val? (If so, it's an implied 0 in other val's units)
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if (!aValue1) {
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aValue1 = GetZeroValueForUnit(aValue2->mGecko.GetUnit());
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return !!aValue1; // Fail if we have no zero value for this unit.
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}
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if (!aValue2) {
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aValue2 = GetZeroValueForUnit(aValue1->mGecko.GetUnit());
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return !!aValue2; // Fail if we have no zero value for this unit.
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}
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// Ok, both values were specified.
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// Need to handle a special-case, though: unitless nonzero length (parsed as
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// eUnit_Float) mixed with unitless 0 length (parsed as eUnit_Coord). These
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// won't interoperate in StyleAnimationValue, since their Units don't match.
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// In this case, we replace the eUnit_Coord 0 value with eUnit_Float 0 value.
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const AnimationValue& zeroCoord =
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*GetZeroValueForUnit(StyleAnimationValue::eUnit_Coord);
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if (*aValue1 == zeroCoord &&
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aValue2->mGecko.GetUnit() == StyleAnimationValue::eUnit_Float) {
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aValue1 = GetZeroValueForUnit(StyleAnimationValue::eUnit_Float);
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} else if (*aValue2 == zeroCoord &&
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aValue1->mGecko.GetUnit() == StyleAnimationValue::eUnit_Float) {
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aValue2 = GetZeroValueForUnit(StyleAnimationValue::eUnit_Float);
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}
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return true;
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}
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static void
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InvertSign(StyleAnimationValue& aValue)
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{
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switch (aValue.GetUnit()) {
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case StyleAnimationValue::eUnit_Coord:
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aValue.SetCoordValue(-aValue.GetCoordValue());
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break;
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case StyleAnimationValue::eUnit_Percent:
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aValue.SetPercentValue(-aValue.GetPercentValue());
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break;
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case StyleAnimationValue::eUnit_Float:
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aValue.SetFloatValue(-aValue.GetFloatValue());
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break;
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default:
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NS_NOTREACHED("Calling InvertSign with an unsupported unit");
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break;
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}
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}
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static ValueWrapper*
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ExtractValueWrapper(nsSMILValue& aValue)
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{
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return static_cast<ValueWrapper*>(aValue.mU.mPtr);
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}
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static const ValueWrapper*
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ExtractValueWrapper(const nsSMILValue& aValue)
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{
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return static_cast<const ValueWrapper*>(aValue.mU.mPtr);
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}
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// Class methods
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// -------------
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void
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nsSMILCSSValueType::Init(nsSMILValue& aValue) const
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{
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MOZ_ASSERT(aValue.IsNull(), "Unexpected SMIL value type");
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aValue.mU.mPtr = nullptr;
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aValue.mType = this;
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}
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void
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nsSMILCSSValueType::Destroy(nsSMILValue& aValue) const
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{
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MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value type");
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delete static_cast<ValueWrapper*>(aValue.mU.mPtr);
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aValue.mType = nsSMILNullType::Singleton();
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}
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nsresult
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nsSMILCSSValueType::Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const
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{
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MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
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MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value type");
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const ValueWrapper* srcWrapper = ExtractValueWrapper(aSrc);
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ValueWrapper* destWrapper = ExtractValueWrapper(aDest);
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if (srcWrapper) {
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if (!destWrapper) {
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// barely-initialized dest -- need to alloc & copy
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aDest.mU.mPtr = new ValueWrapper(*srcWrapper);
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} else {
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// both already fully-initialized -- just copy straight across
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*destWrapper = *srcWrapper;
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}
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} else if (destWrapper) {
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// fully-initialized dest, barely-initialized src -- clear dest
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delete destWrapper;
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aDest.mU.mPtr = destWrapper = nullptr;
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} // else, both are barely-initialized -- nothing to do.
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return NS_OK;
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}
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bool
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nsSMILCSSValueType::IsEqual(const nsSMILValue& aLeft,
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const nsSMILValue& aRight) const
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{
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MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
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MOZ_ASSERT(aLeft.mType == this, "Unexpected SMIL value");
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const ValueWrapper* leftWrapper = ExtractValueWrapper(aLeft);
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const ValueWrapper* rightWrapper = ExtractValueWrapper(aRight);
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if (leftWrapper) {
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if (rightWrapper) {
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// Both non-null
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NS_WARNING_ASSERTION(leftWrapper != rightWrapper,
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"Two nsSMILValues with matching ValueWrapper ptr");
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return (leftWrapper->mPropID == rightWrapper->mPropID &&
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leftWrapper->mCSSValue == rightWrapper->mCSSValue);
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}
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// Left non-null, right null
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return false;
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}
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if (rightWrapper) {
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// Left null, right non-null
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return false;
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}
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// Both null
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return true;
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}
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nsresult
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nsSMILCSSValueType::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const
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{
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MOZ_ASSERT(aValueToAdd.mType == aDest.mType,
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"Trying to add invalid types");
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MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
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ValueWrapper* destWrapper = ExtractValueWrapper(aDest);
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const ValueWrapper* valueToAddWrapper = ExtractValueWrapper(aValueToAdd);
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MOZ_ASSERT(destWrapper || valueToAddWrapper,
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"need at least one fully-initialized value");
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nsCSSPropertyID property = (valueToAddWrapper ? valueToAddWrapper->mPropID :
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destWrapper->mPropID);
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// Special case: font-size-adjust and stroke-dasharray are explicitly
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// non-additive (even though StyleAnimationValue *could* support adding them)
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if (property == eCSSProperty_font_size_adjust ||
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property == eCSSProperty_stroke_dasharray) {
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return NS_ERROR_FAILURE;
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}
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const AnimationValue* valueToAdd = valueToAddWrapper
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? &valueToAddWrapper->mCSSValue
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: nullptr;
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const AnimationValue* destValue = destWrapper
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? &destWrapper->mCSSValue
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: nullptr;
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if (!FinalizeStyleAnimationValues(valueToAdd, destValue)) {
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return NS_ERROR_FAILURE;
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}
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// Did FinalizeStyleAnimationValues change destValue?
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// If so, update outparam to use the new value.
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if (destWrapper && &destWrapper->mCSSValue != destValue) {
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destWrapper->mCSSValue = *destValue;
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}
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// Handle barely-initialized "zero" destination.
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if (!destWrapper) {
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aDest.mU.mPtr = destWrapper = new ValueWrapper(property, *destValue);
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}
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// Bug 1355349: Implement additive animation for Stylo
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if (destWrapper->mCSSValue.mServo) {
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NS_WARNING("stylo: Additive animation not supported yet (bug 1355349)");
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return NS_ERROR_FAILURE;
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}
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return StyleAnimationValue::Add(property,
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destWrapper->mCSSValue.mGecko,
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valueToAdd->mGecko, aCount)
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? NS_OK
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: NS_ERROR_FAILURE;
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}
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nsresult
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nsSMILCSSValueType::ComputeDistance(const nsSMILValue& aFrom,
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const nsSMILValue& aTo,
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double& aDistance) const
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{
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MOZ_ASSERT(aFrom.mType == aTo.mType,
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"Trying to compare different types");
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MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
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const ValueWrapper* fromWrapper = ExtractValueWrapper(aFrom);
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const ValueWrapper* toWrapper = ExtractValueWrapper(aTo);
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MOZ_ASSERT(toWrapper, "expecting non-null endpoint");
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const AnimationValue* fromCSSValue = fromWrapper
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? &fromWrapper->mCSSValue
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: nullptr;
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const AnimationValue* toCSSValue = &toWrapper->mCSSValue;
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if (!FinalizeStyleAnimationValues(fromCSSValue, toCSSValue)) {
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return NS_ERROR_FAILURE;
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}
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if (toCSSValue->mServo) {
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aDistance = Servo_AnimationValues_ComputeDistance(fromCSSValue->mServo,
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toCSSValue->mServo);
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return NS_OK;
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}
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return StyleAnimationValue::ComputeDistance(toWrapper->mPropID,
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fromCSSValue->mGecko,
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toCSSValue->mGecko,
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nullptr,
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aDistance)
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? NS_OK
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: NS_ERROR_FAILURE;
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}
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nsresult
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nsSMILCSSValueType::Interpolate(const nsSMILValue& aStartVal,
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const nsSMILValue& aEndVal,
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double aUnitDistance,
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nsSMILValue& aResult) const
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{
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MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
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"Trying to interpolate different types");
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MOZ_ASSERT(aStartVal.mType == this,
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"Unexpected types for interpolation");
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MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
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MOZ_ASSERT(aUnitDistance >= 0.0 && aUnitDistance <= 1.0,
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"unit distance value out of bounds");
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MOZ_ASSERT(!aResult.mU.mPtr, "expecting barely-initialized outparam");
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const ValueWrapper* startWrapper = ExtractValueWrapper(aStartVal);
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const ValueWrapper* endWrapper = ExtractValueWrapper(aEndVal);
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MOZ_ASSERT(endWrapper, "expecting non-null endpoint");
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const AnimationValue* startCSSValue = startWrapper
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? &startWrapper->mCSSValue
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: nullptr;
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const AnimationValue* endCSSValue = &endWrapper->mCSSValue;
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if (!FinalizeStyleAnimationValues(startCSSValue, endCSSValue)) {
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return NS_ERROR_FAILURE;
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}
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MOZ_ASSERT(!startCSSValue ||
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!startCSSValue->mServo == !endCSSValue->mServo,
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"Start and end values should use the same style system");
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if (endCSSValue->mServo) {
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RefPtr<RawServoAnimationValue> resultValue =
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Servo_AnimationValues_Interpolate(startCSSValue->mServo,
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endCSSValue->mServo,
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aUnitDistance).Consume();
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if (!resultValue) {
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return NS_ERROR_FAILURE;
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}
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aResult.mU.mPtr = new ValueWrapper(endWrapper->mPropID, resultValue);
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return NS_OK;
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}
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StyleAnimationValue resultValue;
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if (StyleAnimationValue::Interpolate(endWrapper->mPropID,
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startCSSValue->mGecko,
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endCSSValue->mGecko,
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aUnitDistance, resultValue)) {
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aResult.mU.mPtr = new ValueWrapper(endWrapper->mPropID, resultValue);
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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// Helper function to extract presContext
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static nsPresContext*
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GetPresContextForElement(Element* aElem)
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{
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nsIDocument* doc = aElem->GetUncomposedDoc();
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if (!doc) {
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// This can happen if we process certain types of restyles mid-sample
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// and remove anonymous animated content from the document as a result.
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// See bug 534975.
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return nullptr;
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}
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nsIPresShell* shell = doc->GetShell();
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return shell ? shell->GetPresContext() : nullptr;
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}
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static const nsDependentSubstring
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GetNonNegativePropValue(const nsAString& aString, nsCSSPropertyID aPropID,
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bool& aIsNegative)
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{
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// If value is negative, we'll strip off the "-" so the CSS parser won't
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// barf, and then manually make the parsed value negative.
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// (This is a partial solution to let us accept some otherwise out-of-bounds
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// CSS values. Bug 501188 will provide a more complete fix.)
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aIsNegative = false;
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uint32_t subStringBegin = 0;
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// NOTE: We need to opt-out 'stroke-dasharray' from the negative-number
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// check. Its values might look negative (e.g. by starting with "-1"), but
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// they're more complicated than our simple negation logic here can handle.
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if (aPropID != eCSSProperty_stroke_dasharray) {
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int32_t absValuePos = nsSMILParserUtils::CheckForNegativeNumber(aString);
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if (absValuePos > 0) {
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aIsNegative = true;
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subStringBegin = (uint32_t)absValuePos; // Start parsing after '-' sign
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}
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}
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return Substring(aString, subStringBegin);
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}
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// Helper function to parse a string into a StyleAnimationValue
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static bool
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ValueFromStringHelper(nsCSSPropertyID aPropID,
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Element* aTargetElement,
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nsPresContext* aPresContext,
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nsStyleContext* aStyleContext,
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const nsAString& aString,
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StyleAnimationValue& aStyleAnimValue,
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bool* aIsContextSensitive)
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{
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bool isNegative = false;
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const nsDependentSubstring subString =
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GetNonNegativePropValue(aString, aPropID, isNegative);
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if (!StyleAnimationValue::ComputeValue(aPropID, aTargetElement, aStyleContext,
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subString, true, aStyleAnimValue,
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aIsContextSensitive)) {
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return false;
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}
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if (isNegative) {
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InvertSign(aStyleAnimValue);
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}
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if (aPropID == eCSSProperty_font_size) {
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// Divide out text-zoom, since SVG is supposed to ignore it
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MOZ_ASSERT(aStyleAnimValue.GetUnit() == StyleAnimationValue::eUnit_Coord,
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"'font-size' value with unexpected style unit");
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aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
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aPresContext->EffectiveTextZoom());
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}
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return true;
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}
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static already_AddRefed<RawServoAnimationValue>
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ValueFromStringHelper(nsCSSPropertyID aPropID,
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Element* aTargetElement,
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nsPresContext* aPresContext,
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nsStyleContext* aStyleContext,
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const nsAString& aString)
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{
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// FIXME (bug 1358966): Support shorthand properties
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if (nsCSSProps::IsShorthand(aPropID)) {
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return nullptr;
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}
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// Get a suitable style context for Servo
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const ServoComputedValues* currentStyle =
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aStyleContext->StyleSource().AsServoComputedValues();
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// Bug 1349004: Remove GetParentAllowServo
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const ServoComputedValues* parentStyle =
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aStyleContext->GetParentAllowServo()
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? aStyleContext->GetParentAllowServo()->StyleSource()
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.AsServoComputedValues()
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: nullptr;
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const ServoComputedValuesWithParent servoStyles =
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{ currentStyle, parentStyle };
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// FIXME (bug 1357295): Handle negative values properly
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#ifdef DEBUG
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{
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bool isNegative = false;
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Unused << GetNonNegativePropValue(aString, aPropID, isNegative);
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if (isNegative) {
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NS_WARNING("stylo: Special negative value handling not yet supported"
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" (bug 1357295)");
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}
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}
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#endif // DEBUG
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|
|
|
// Parse property
|
|
nsIDocument* doc = aTargetElement->GetUncomposedDoc();
|
|
if (!doc) {
|
|
return nullptr;
|
|
}
|
|
// FIXME this is using the wrong base uri (bug 1343919)
|
|
RefPtr<URLExtraData> data = new URLExtraData(doc->GetDocumentURI(),
|
|
doc->GetDocumentURI(),
|
|
doc->NodePrincipal());
|
|
NS_ConvertUTF16toUTF8 value(aString);
|
|
RefPtr<RawServoDeclarationBlock> servoDeclarationBlock =
|
|
Servo_ParseProperty(aPropID, &value, data).Consume();
|
|
if (!servoDeclarationBlock) {
|
|
return nullptr;
|
|
}
|
|
|
|
// Compute value
|
|
PropertyValuePair propValuePair;
|
|
propValuePair.mProperty = aPropID;
|
|
propValuePair.mServoDeclarationBlock = servoDeclarationBlock;
|
|
AutoTArray<Keyframe, 1> keyframes;
|
|
keyframes.AppendElement()->mPropertyValues.AppendElement(Move(propValuePair));
|
|
nsTArray<ComputedKeyframeValues> computedValues =
|
|
aPresContext->StyleSet()->AsServo()
|
|
->GetComputedKeyframeValuesFor(keyframes, aTargetElement, servoStyles);
|
|
|
|
// Pull out the appropriate value
|
|
if (computedValues.IsEmpty() || computedValues[0].IsEmpty()) {
|
|
return nullptr;
|
|
}
|
|
// So long as we don't support shorthands (bug 1358966) the following
|
|
// assertion should hold.
|
|
MOZ_ASSERT(computedValues.Length() == 1 &&
|
|
computedValues[0].Length() == 1,
|
|
"Should only have a single property with a single value");
|
|
AnimationValue computedValue = computedValues[0][0].mValue;
|
|
if (!computedValue.mServo) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aPropID == eCSSProperty_font_size) {
|
|
// FIXME (bug 1357296): Divide out text-zoom, since SVG is supposed to
|
|
// ignore it.
|
|
if (aPresContext->EffectiveTextZoom() != 1.0) {
|
|
NS_WARNING("stylo: Dividing out text-zoom not yet supported"
|
|
" (bug 1357296)");
|
|
}
|
|
}
|
|
|
|
// Result should be already add-refed
|
|
return computedValue.mServo.forget();
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsSMILCSSValueType::ValueFromString(nsCSSPropertyID aPropID,
|
|
Element* aTargetElement,
|
|
const nsAString& aString,
|
|
nsSMILValue& aValue,
|
|
bool* aIsContextSensitive)
|
|
{
|
|
MOZ_ASSERT(aValue.IsNull(), "Outparam should be null-typed");
|
|
nsPresContext* presContext = GetPresContextForElement(aTargetElement);
|
|
if (!presContext) {
|
|
NS_WARNING("Not parsing animation value; unable to get PresContext");
|
|
return;
|
|
}
|
|
|
|
nsIDocument* doc = aTargetElement->GetUncomposedDoc();
|
|
if (doc && !nsStyleUtil::CSPAllowsInlineStyle(nullptr,
|
|
doc->NodePrincipal(),
|
|
doc->GetDocumentURI(),
|
|
0, aString, nullptr)) {
|
|
return;
|
|
}
|
|
|
|
RefPtr<nsStyleContext> styleContext =
|
|
nsComputedDOMStyle::GetStyleContext(aTargetElement, nullptr,
|
|
presContext->PresShell());
|
|
if (!styleContext) {
|
|
return;
|
|
}
|
|
|
|
if (aTargetElement->IsStyledByServo()) {
|
|
RefPtr<RawServoAnimationValue> parsedValue =
|
|
ValueFromStringHelper(aPropID, aTargetElement, presContext,
|
|
styleContext, aString);
|
|
if (aIsContextSensitive) {
|
|
// FIXME: Bug 1358955 - detect context-sensitive values and set this value
|
|
// appropriately.
|
|
*aIsContextSensitive = false;
|
|
}
|
|
|
|
if (parsedValue) {
|
|
sSingleton.Init(aValue);
|
|
aValue.mU.mPtr = new ValueWrapper(aPropID, parsedValue);
|
|
}
|
|
return;
|
|
}
|
|
|
|
StyleAnimationValue parsedValue;
|
|
if (ValueFromStringHelper(aPropID, aTargetElement, presContext, styleContext,
|
|
aString, parsedValue, aIsContextSensitive)) {
|
|
sSingleton.Init(aValue);
|
|
aValue.mU.mPtr = new ValueWrapper(aPropID, parsedValue);
|
|
}
|
|
}
|
|
|
|
// static
|
|
nsSMILValue
|
|
nsSMILCSSValueType::ValueFromAnimationValue(nsCSSPropertyID aPropID,
|
|
Element* aTargetElement,
|
|
const AnimationValue& aValue)
|
|
{
|
|
nsSMILValue result;
|
|
|
|
nsIDocument* doc = aTargetElement->GetUncomposedDoc();
|
|
// We'd like to avoid serializing |aValue| if possible, and since the
|
|
// string passed to CSPAllowsInlineStyle is only used for reporting violations
|
|
// and an intermediate CSS value is not likely to be particularly useful
|
|
// in that case, we just use a generic placeholder string instead.
|
|
static const nsLiteralString kPlaceholderText =
|
|
NS_LITERAL_STRING("[SVG animation of CSS]");
|
|
if (doc && !nsStyleUtil::CSPAllowsInlineStyle(nullptr,
|
|
doc->NodePrincipal(),
|
|
doc->GetDocumentURI(),
|
|
0, kPlaceholderText, nullptr)) {
|
|
return result;
|
|
}
|
|
|
|
sSingleton.Init(result);
|
|
result.mU.mPtr = new ValueWrapper(aPropID, aValue);
|
|
|
|
return result;
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsSMILCSSValueType::ValueToString(const nsSMILValue& aValue,
|
|
nsAString& aString)
|
|
{
|
|
MOZ_ASSERT(aValue.mType == &nsSMILCSSValueType::sSingleton,
|
|
"Unexpected SMIL value type");
|
|
const ValueWrapper* wrapper = ExtractValueWrapper(aValue);
|
|
if (!wrapper) {
|
|
return;
|
|
}
|
|
|
|
wrapper->mCSSValue.SerializeSpecifiedValue(wrapper->mPropID, aString);
|
|
}
|
|
|
|
// static
|
|
nsCSSPropertyID
|
|
nsSMILCSSValueType::PropertyFromValue(const nsSMILValue& aValue)
|
|
{
|
|
if (aValue.mType != &nsSMILCSSValueType::sSingleton) {
|
|
return eCSSProperty_UNKNOWN;
|
|
}
|
|
|
|
const ValueWrapper* wrapper = ExtractValueWrapper(aValue);
|
|
if (!wrapper) {
|
|
return eCSSProperty_UNKNOWN;
|
|
}
|
|
|
|
return wrapper->mPropID;
|
|
}
|