зеркало из https://github.com/mozilla/gecko-dev.git
960 строки
32 KiB
C++
960 строки
32 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/ServoBindings.h"
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#include "mozilla/StyleAnimationValue.h" // For AnimationValue
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#include "mozilla/ServoCSSParser.h"
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#include "mozilla/StyleSetHandleInlines.h"
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#include "mozilla/dom/BaseKeyframeTypesBinding.h" // For CompositeOperation
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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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typedef AutoTArray<RefPtr<RawServoAnimationValue>, 1> ServoAnimationValues;
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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)
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{
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if (aValue.mServo) {
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mServoValues.AppendElement(aValue.mServo);
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return;
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}
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#ifdef MOZ_OLD_STYLE
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mGeckoValue = aValue.mGecko;
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#else
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MOZ_CRASH("old style system disabled");
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#endif
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}
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#ifdef MOZ_OLD_STYLE
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ValueWrapper(nsCSSPropertyID aPropID, const StyleAnimationValue& aValue)
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: mPropID(aPropID), mGeckoValue(aValue) {}
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#endif
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ValueWrapper(nsCSSPropertyID aPropID,
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const RefPtr<RawServoAnimationValue>& aValue)
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: mPropID(aPropID), mServoValues{(aValue)} {}
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ValueWrapper(nsCSSPropertyID aPropID, ServoAnimationValues&& aValues)
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: mPropID(aPropID), mServoValues{aValues} {}
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bool operator==(const ValueWrapper& aOther) const
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{
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if (mPropID != aOther.mPropID) {
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return false;
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}
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if (!mServoValues.IsEmpty()) {
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size_t len = mServoValues.Length();
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if (len != aOther.mServoValues.Length()) {
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return false;
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}
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for (size_t i = 0; i < len; i++) {
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if (!Servo_AnimationValue_DeepEqual(mServoValues[i],
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aOther.mServoValues[i])) {
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return false;
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}
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}
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return true;
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}
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#ifdef MOZ_OLD_STYLE
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return mGeckoValue == aOther.mGeckoValue;
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#else
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MOZ_CRASH("old style system disabled");
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#endif
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}
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bool operator!=(const ValueWrapper& aOther) const
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{
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return !(*this == aOther);
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}
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nsCSSPropertyID mPropID;
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ServoAnimationValues mServoValues;
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#ifdef MOZ_OLD_STYLE
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StyleAnimationValue mGeckoValue;
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#endif
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};
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// Helper Methods
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// --------------
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#ifdef MOZ_OLD_STYLE
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static const StyleAnimationValue*
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GetZeroValueForUnit(StyleAnimationValue::Unit aUnit)
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{
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static const StyleAnimationValue
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sZeroCoord(0, StyleAnimationValue::CoordConstructor);
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static const StyleAnimationValue
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sZeroPercent(0.0f, StyleAnimationValue::PercentConstructor);
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static const StyleAnimationValue
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sZeroFloat(0.0f, StyleAnimationValue::FloatConstructor);
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static const StyleAnimationValue
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sZeroColor(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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#endif
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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 simply returns true.
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//
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// If both arguments are null, this method returns false.
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//
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// |aZeroValueStorage| should be a reference to a RefPtr<RawServoAnimationValue>.
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// This is used where we may need to allocate a new ServoAnimationValue to
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// represent the appropriate zero value.
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//
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// Returns true on success, or otherwise.
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static bool
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FinalizeServoAnimationValues(const RefPtr<RawServoAnimationValue>*& aValue1,
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const RefPtr<RawServoAnimationValue>*& aValue2,
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RefPtr<RawServoAnimationValue>& aZeroValueStorage)
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{
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if (!aValue1 && !aValue2) {
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return false;
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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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aZeroValueStorage = Servo_AnimationValues_GetZeroValue(*aValue2).Consume();
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aValue1 = &aZeroValueStorage;
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} else if (!aValue2) {
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aZeroValueStorage = Servo_AnimationValues_GetZeroValue(*aValue1).Consume();
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aValue2 = &aZeroValueStorage;
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}
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return *aValue1 && *aValue2;
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}
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#ifdef MOZ_OLD_STYLE
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static bool
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FinalizeStyleAnimationValues(const StyleAnimationValue*& aValue1,
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const StyleAnimationValue*& aValue2)
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{
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if (!aValue1 && !aValue2) {
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return false;
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}
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if (!aValue1) {
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aValue1 = GetZeroValueForUnit(aValue2->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->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 StyleAnimationValue& zeroCoord =
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*GetZeroValueForUnit(StyleAnimationValue::eUnit_Coord);
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if (*aValue1 == zeroCoord &&
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aValue2->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->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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#endif
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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 == *rightWrapper;
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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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static bool
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AddOrAccumulateForServo(nsSMILValue& aDest,
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const ValueWrapper* aValueToAddWrapper,
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ValueWrapper* aDestWrapper,
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CompositeOperation aCompositeOp,
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uint64_t aCount)
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{
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nsCSSPropertyID property = aValueToAddWrapper
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? aValueToAddWrapper->mPropID
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: aDestWrapper->mPropID;
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size_t len = aValueToAddWrapper
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? aValueToAddWrapper->mServoValues.Length()
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: aDestWrapper->mServoValues.Length();
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MOZ_ASSERT(!aValueToAddWrapper || !aDestWrapper ||
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aValueToAddWrapper->mServoValues.Length() ==
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aDestWrapper->mServoValues.Length(),
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"Both of values' length in the wrappers should be the same if "
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"both of them exist");
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for (size_t i = 0; i < len; i++) {
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const RefPtr<RawServoAnimationValue>* valueToAdd =
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aValueToAddWrapper
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? &aValueToAddWrapper->mServoValues[i]
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: nullptr;
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const RefPtr<RawServoAnimationValue>* destValue =
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aDestWrapper
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? &aDestWrapper->mServoValues[i]
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: nullptr;
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RefPtr<RawServoAnimationValue> zeroValueStorage;
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if (!FinalizeServoAnimationValues(valueToAdd, destValue, zeroValueStorage)) {
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return false;
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}
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// FinalizeServoAnimationValues may have updated destValue so we should make
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// sure the aDest and aDestWrapper outparams are up-to-date.
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if (aDestWrapper) {
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aDestWrapper->mServoValues[i] = *destValue;
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} else {
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// aDest may be a barely-initialized "zero" destination.
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aDest.mU.mPtr = aDestWrapper = new ValueWrapper(property, *destValue);
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aDestWrapper->mServoValues.SetLength(len);
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}
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RefPtr<RawServoAnimationValue> result;
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if (aCompositeOp == CompositeOperation::Add) {
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result = Servo_AnimationValues_Add(*destValue, *valueToAdd).Consume();
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} else {
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result = Servo_AnimationValues_Accumulate(*destValue,
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*valueToAdd,
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aCount).Consume();
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}
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if (!result) {
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return false;
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}
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aDestWrapper->mServoValues[i] = result;
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}
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return true;
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}
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static bool
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AddOrAccumulate(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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CompositeOperation aCompositeOp, uint64_t aCount)
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{
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MOZ_ASSERT(aValueToAdd.mType == aDest.mType,
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"Trying to add mismatching types");
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MOZ_ASSERT(aValueToAdd.mType == &nsSMILCSSValueType::sSingleton,
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"Unexpected SMIL value type");
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MOZ_ASSERT(aCompositeOp == CompositeOperation::Add ||
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aCompositeOp == CompositeOperation::Accumulate,
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"Composite operation should be add or accumulate");
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MOZ_ASSERT(aCompositeOp != CompositeOperation::Add || aCount == 1,
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"Count should be 1 if composite operation is add");
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ValueWrapper* destWrapper = ExtractValueWrapper(aDest);
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const ValueWrapper* valueToAddWrapper = ExtractValueWrapper(aValueToAdd);
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// If both of the values are empty just fail. This can happen in rare cases
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// such as when the underlying animation produced an empty value.
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//
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// Technically, it doesn't matter what we return here since in either case it
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// will produce the same result: an empty value.
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if (!destWrapper && !valueToAddWrapper) {
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return false;
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}
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nsCSSPropertyID property = valueToAddWrapper
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? 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 false;
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}
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// Skip font shorthand since it includes font-size-adjust.
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if (property == eCSSProperty_font) {
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return false;
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}
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bool isServo = valueToAddWrapper
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? !valueToAddWrapper->mServoValues.IsEmpty()
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: !destWrapper->mServoValues.IsEmpty();
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if (isServo) {
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return AddOrAccumulateForServo(aDest,
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valueToAddWrapper,
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destWrapper,
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aCompositeOp,
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aCount);
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}
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#ifdef MOZ_OLD_STYLE
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const StyleAnimationValue* valueToAdd = valueToAddWrapper ?
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&valueToAddWrapper->mGeckoValue : nullptr;
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const StyleAnimationValue* destValue = destWrapper ?
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&destWrapper->mGeckoValue : nullptr;
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if (!FinalizeStyleAnimationValues(valueToAdd, destValue)) {
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return false;
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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->mGeckoValue != destValue) {
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destWrapper->mGeckoValue = *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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// For Gecko, we currently call Add for either composite mode.
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//
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// This is not ideal, but it doesn't make any difference for the set of
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// properties we currently allow adding in SMIL and this code path will
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// hopefully become obsolete before we expand that set.
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return StyleAnimationValue::Add(property,
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destWrapper->mGeckoValue,
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*valueToAdd, aCount);
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#else
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MOZ_CRASH("old style system disabled");
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#endif
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}
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nsresult
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nsSMILCSSValueType::SandwichAdd(nsSMILValue& aDest,
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const nsSMILValue& aValueToAdd) const
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{
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return AddOrAccumulate(aDest, aValueToAdd, CompositeOperation::Add, 1)
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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::Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
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uint32_t aCount) const
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{
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return AddOrAccumulate(aDest, aValueToAdd, CompositeOperation::Accumulate,
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aCount)
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? NS_OK
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: NS_ERROR_FAILURE;
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}
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static nsresult
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ComputeDistanceForServo(const ValueWrapper* aFromWrapper,
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const ValueWrapper& aToWrapper,
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double& aDistance)
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{
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size_t len = aToWrapper.mServoValues.Length();
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MOZ_ASSERT(!aFromWrapper || aFromWrapper->mServoValues.Length() == len,
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"From and to values length should be the same if "
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"The start value exists");
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double squareDistance = 0;
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for (size_t i = 0; i < len; i++) {
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const RefPtr<RawServoAnimationValue>* fromValue =
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aFromWrapper ? &aFromWrapper->mServoValues[0] : nullptr;
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const RefPtr<RawServoAnimationValue>* toValue = &aToWrapper.mServoValues[0];
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RefPtr<RawServoAnimationValue> zeroValueStorage;
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if (!FinalizeServoAnimationValues(fromValue, toValue, zeroValueStorage)) {
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return NS_ERROR_FAILURE;
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}
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double distance = Servo_AnimationValues_ComputeDistance(*fromValue, *toValue);
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if (distance < 0.0) {
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return NS_ERROR_FAILURE;
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}
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if (len == 1) {
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aDistance = distance;
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return NS_OK;
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}
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squareDistance += distance * distance;
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}
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aDistance = sqrt(squareDistance);
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return NS_OK;
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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,
|
|
double& aDistance) const
|
|
{
|
|
MOZ_ASSERT(aFrom.mType == aTo.mType,
|
|
"Trying to compare different types");
|
|
MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
|
|
|
|
const ValueWrapper* fromWrapper = ExtractValueWrapper(aFrom);
|
|
const ValueWrapper* toWrapper = ExtractValueWrapper(aTo);
|
|
MOZ_ASSERT(toWrapper, "expecting non-null endpoint");
|
|
|
|
if (!toWrapper->mServoValues.IsEmpty()) {
|
|
return ComputeDistanceForServo(fromWrapper, *toWrapper, aDistance);
|
|
}
|
|
|
|
#ifdef MOZ_OLD_STYLE
|
|
const StyleAnimationValue* fromCSSValue = fromWrapper ?
|
|
&fromWrapper->mGeckoValue : nullptr;
|
|
const StyleAnimationValue* toCSSValue = &toWrapper->mGeckoValue;
|
|
if (!FinalizeStyleAnimationValues(fromCSSValue, toCSSValue)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return StyleAnimationValue::ComputeDistance(toWrapper->mPropID,
|
|
fromWrapper->mGeckoValue,
|
|
toWrapper->mGeckoValue,
|
|
nullptr,
|
|
aDistance)
|
|
? NS_OK
|
|
: NS_ERROR_FAILURE;
|
|
#else
|
|
MOZ_CRASH("old style system disabled");
|
|
#endif
|
|
}
|
|
|
|
#ifdef MOZ_OLD_STYLE
|
|
static nsresult
|
|
InterpolateForGecko(const ValueWrapper* aStartWrapper,
|
|
const ValueWrapper& aEndWrapper,
|
|
double aUnitDistance,
|
|
nsSMILValue& aResult)
|
|
{
|
|
const StyleAnimationValue* startCSSValue = aStartWrapper
|
|
? &aStartWrapper->mGeckoValue
|
|
: nullptr;
|
|
const StyleAnimationValue* endCSSValue = &aEndWrapper.mGeckoValue;
|
|
if (!FinalizeStyleAnimationValues(startCSSValue, endCSSValue)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
StyleAnimationValue resultValue;
|
|
if (StyleAnimationValue::Interpolate(aEndWrapper.mPropID,
|
|
*startCSSValue,
|
|
*endCSSValue,
|
|
aUnitDistance, resultValue)) {
|
|
aResult.mU.mPtr = new ValueWrapper(aEndWrapper.mPropID, resultValue);
|
|
return NS_OK;
|
|
}
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
static nsresult
|
|
InterpolateForServo(const ValueWrapper* aStartWrapper,
|
|
const ValueWrapper& aEndWrapper,
|
|
double aUnitDistance,
|
|
nsSMILValue& aResult)
|
|
{
|
|
// For discretely-animated properties Servo_AnimationValues_Interpolate will
|
|
// perform the discrete animation (i.e. 50% flip) and return a success result.
|
|
// However, SMIL has its own special discrete animation behavior that it uses
|
|
// when keyTimes are specified, but we won't run that unless that this method
|
|
// returns a failure to indicate that the property cannot be smoothly
|
|
// interpolated, i.e. that we need to use a discrete calcMode.
|
|
//
|
|
// For shorthands, Servo_Property_IsDiscreteAnimatable will always return
|
|
// false. That's fine since most shorthands (like 'font' and
|
|
// 'text-decoration') include non-discrete components. If authors want to
|
|
// treat all components as discrete then they should use calcMode="discrete".
|
|
if (Servo_Property_IsDiscreteAnimatable(aEndWrapper.mPropID)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
ServoAnimationValues results;
|
|
size_t len = aEndWrapper.mServoValues.Length();
|
|
results.SetCapacity(len);
|
|
MOZ_ASSERT(!aStartWrapper || aStartWrapper->mServoValues.Length() == len,
|
|
"Start and end values length should be the same if "
|
|
"the start value exists");
|
|
for (size_t i = 0; i < len; i++) {
|
|
const RefPtr<RawServoAnimationValue>*
|
|
startValue = aStartWrapper
|
|
? &aStartWrapper->mServoValues[i]
|
|
: nullptr;
|
|
const RefPtr<RawServoAnimationValue>* endValue = &aEndWrapper.mServoValues[i];
|
|
RefPtr<RawServoAnimationValue> zeroValueStorage;
|
|
if (!FinalizeServoAnimationValues(startValue, endValue, zeroValueStorage)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
RefPtr<RawServoAnimationValue> result =
|
|
Servo_AnimationValues_Interpolate(*startValue,
|
|
*endValue,
|
|
aUnitDistance).Consume();
|
|
if (!result) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
results.AppendElement(result);
|
|
}
|
|
aResult.mU.mPtr = new ValueWrapper(aEndWrapper.mPropID, Move(results));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsSMILCSSValueType::Interpolate(const nsSMILValue& aStartVal,
|
|
const nsSMILValue& aEndVal,
|
|
double aUnitDistance,
|
|
nsSMILValue& aResult) const
|
|
{
|
|
MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
|
|
"Trying to interpolate different types");
|
|
MOZ_ASSERT(aStartVal.mType == this,
|
|
"Unexpected types for interpolation");
|
|
MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
|
|
MOZ_ASSERT(aUnitDistance >= 0.0 && aUnitDistance <= 1.0,
|
|
"unit distance value out of bounds");
|
|
MOZ_ASSERT(!aResult.mU.mPtr, "expecting barely-initialized outparam");
|
|
|
|
const ValueWrapper* startWrapper = ExtractValueWrapper(aStartVal);
|
|
const ValueWrapper* endWrapper = ExtractValueWrapper(aEndVal);
|
|
MOZ_ASSERT(endWrapper, "expecting non-null endpoint");
|
|
|
|
if (!endWrapper->mServoValues.IsEmpty()) {
|
|
return InterpolateForServo(startWrapper,
|
|
*endWrapper,
|
|
aUnitDistance,
|
|
aResult);
|
|
}
|
|
|
|
#ifdef MOZ_OLD_STYLE
|
|
return InterpolateForGecko(startWrapper,
|
|
*endWrapper,
|
|
aUnitDistance,
|
|
aResult);
|
|
#else
|
|
MOZ_CRASH("old style system disabled");
|
|
#endif
|
|
}
|
|
|
|
// Helper function to extract presContext
|
|
static nsPresContext*
|
|
GetPresContextForElement(Element* aElem)
|
|
{
|
|
nsIDocument* doc = aElem->GetUncomposedDoc();
|
|
if (!doc) {
|
|
// This can happen if we process certain types of restyles mid-sample
|
|
// and remove anonymous animated content from the document as a result.
|
|
// See bug 534975.
|
|
return nullptr;
|
|
}
|
|
return doc->GetPresContext();
|
|
}
|
|
|
|
#ifdef MOZ_OLD_STYLE
|
|
static const nsDependentSubstring
|
|
GetNonNegativePropValue(const nsAString& aString, nsCSSPropertyID aPropID,
|
|
bool& aIsNegative)
|
|
{
|
|
// If value is negative, we'll strip off the "-" so the CSS parser won't
|
|
// barf, and then manually make the parsed value negative.
|
|
// (This is a partial solution to let us accept some otherwise out-of-bounds
|
|
// CSS values. Bug 501188 will provide a more complete fix.)
|
|
aIsNegative = false;
|
|
uint32_t subStringBegin = 0;
|
|
|
|
// NOTE: We need to opt-out 'stroke-dasharray' from the negative-number
|
|
// check. Its values might look negative (e.g. by starting with "-1"), but
|
|
// they're more complicated than our simple negation logic here can handle.
|
|
if (aPropID != eCSSProperty_stroke_dasharray) {
|
|
int32_t absValuePos = nsSMILParserUtils::CheckForNegativeNumber(aString);
|
|
if (absValuePos > 0) {
|
|
aIsNegative = true;
|
|
subStringBegin = (uint32_t)absValuePos; // Start parsing after '-' sign
|
|
}
|
|
}
|
|
|
|
return Substring(aString, subStringBegin);
|
|
}
|
|
|
|
// Helper function to parse a string into a StyleAnimationValue
|
|
static bool
|
|
ValueFromStringHelper(nsCSSPropertyID aPropID,
|
|
Element* aTargetElement,
|
|
nsPresContext* aPresContext,
|
|
mozilla::GeckoStyleContext* aStyleContext,
|
|
const nsAString& aString,
|
|
StyleAnimationValue& aStyleAnimValue,
|
|
bool* aIsContextSensitive)
|
|
{
|
|
bool isNegative = false;
|
|
const nsDependentSubstring subString =
|
|
GetNonNegativePropValue(aString, aPropID, isNegative);
|
|
|
|
if (!StyleAnimationValue::ComputeValue(aPropID, aTargetElement, aStyleContext,
|
|
subString, true, aStyleAnimValue,
|
|
aIsContextSensitive)) {
|
|
return false;
|
|
}
|
|
if (isNegative) {
|
|
InvertSign(aStyleAnimValue);
|
|
}
|
|
|
|
if (aPropID == eCSSProperty_font_size) {
|
|
// Divide out text-zoom, since SVG is supposed to ignore it
|
|
MOZ_ASSERT(aStyleAnimValue.GetUnit() == StyleAnimationValue::eUnit_Coord,
|
|
"'font-size' value with unexpected style unit");
|
|
aStyleAnimValue.SetCoordValue(aStyleAnimValue.GetCoordValue() /
|
|
aPresContext->EffectiveTextZoom());
|
|
}
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
static ServoAnimationValues
|
|
ValueFromStringHelper(nsCSSPropertyID aPropID,
|
|
Element* aTargetElement,
|
|
nsPresContext* aPresContext,
|
|
nsStyleContext* aStyleContext,
|
|
const nsAString& aString)
|
|
{
|
|
ServoAnimationValues result;
|
|
|
|
nsIDocument* doc = aTargetElement->GetUncomposedDoc();
|
|
if (!doc) {
|
|
return result;
|
|
}
|
|
|
|
// Parse property
|
|
ServoCSSParser::ParsingEnvironment env =
|
|
ServoCSSParser::GetParsingEnvironment(doc);
|
|
RefPtr<RawServoDeclarationBlock> servoDeclarationBlock =
|
|
ServoCSSParser::ParseProperty(aPropID, aString, env,
|
|
ParsingMode::AllowUnitlessLength |
|
|
ParsingMode::AllowAllNumericValues);
|
|
if (!servoDeclarationBlock) {
|
|
return result;
|
|
}
|
|
|
|
// Compute value
|
|
aPresContext->StyleSet()->AsServo()->GetAnimationValues(servoDeclarationBlock,
|
|
aTargetElement,
|
|
aStyleContext->AsServo(),
|
|
result);
|
|
|
|
return result;
|
|
}
|
|
|
|
// 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(),
|
|
nullptr,
|
|
doc->GetDocumentURI(),
|
|
0, aString, nullptr)) {
|
|
return;
|
|
}
|
|
|
|
RefPtr<nsStyleContext> styleContext =
|
|
nsComputedDOMStyle::GetStyleContext(aTargetElement, nullptr);
|
|
if (!styleContext) {
|
|
return;
|
|
}
|
|
|
|
if (styleContext->IsServo()) {
|
|
ServoAnimationValues parsedValues =
|
|
ValueFromStringHelper(aPropID, aTargetElement, presContext,
|
|
styleContext, aString);
|
|
if (aIsContextSensitive) {
|
|
// FIXME: Bug 1358955 - detect context-sensitive values and set this value
|
|
// appropriately.
|
|
*aIsContextSensitive = false;
|
|
}
|
|
|
|
if (!parsedValues.IsEmpty()) {
|
|
sSingleton.Init(aValue);
|
|
aValue.mU.mPtr = new ValueWrapper(aPropID, Move(parsedValues));
|
|
}
|
|
return;
|
|
}
|
|
|
|
#ifdef MOZ_OLD_STYLE
|
|
StyleAnimationValue parsedValue;
|
|
if (ValueFromStringHelper(aPropID, aTargetElement, presContext,
|
|
styleContext->AsGecko(), aString, parsedValue,
|
|
aIsContextSensitive)) {
|
|
sSingleton.Init(aValue);
|
|
aValue.mU.mPtr = new ValueWrapper(aPropID, parsedValue);
|
|
}
|
|
#else
|
|
MOZ_CRASH("old style system disabled");
|
|
#endif
|
|
}
|
|
|
|
// 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(),
|
|
nullptr,
|
|
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;
|
|
}
|
|
|
|
if (wrapper->mServoValues.IsEmpty()) {
|
|
#ifdef MOZ_OLD_STYLE
|
|
DebugOnly<bool> uncomputeResult =
|
|
StyleAnimationValue::UncomputeValue(wrapper->mPropID,
|
|
wrapper->mGeckoValue,
|
|
aString);
|
|
return;
|
|
#else
|
|
MOZ_CRASH("old style system disabled");
|
|
#endif
|
|
}
|
|
|
|
if (nsCSSProps::IsShorthand(wrapper->mPropID)) {
|
|
// In case of shorthand on servo, we iterate over all mServoValues array
|
|
// since we have multiple AnimationValues in the array for each longhand
|
|
// component.
|
|
Servo_Shorthand_AnimationValues_Serialize(wrapper->mPropID,
|
|
&wrapper->mServoValues,
|
|
&aString);
|
|
return;
|
|
}
|
|
|
|
Servo_AnimationValue_Serialize(wrapper->mServoValues[0],
|
|
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;
|
|
}
|
|
|
|
// static
|
|
void
|
|
nsSMILCSSValueType::FinalizeValue(nsSMILValue& aValue,
|
|
const nsSMILValue& aValueToMatch)
|
|
{
|
|
MOZ_ASSERT(aValue.mType == aValueToMatch.mType, "Incompatible SMIL types");
|
|
MOZ_ASSERT(aValue.mType == &nsSMILCSSValueType::sSingleton,
|
|
"Unexpected SMIL value type");
|
|
|
|
ValueWrapper* valueWrapper = ExtractValueWrapper(aValue);
|
|
// If |aValue| already has a value, there's nothing to do here.
|
|
if (valueWrapper) {
|
|
return;
|
|
}
|
|
|
|
const ValueWrapper* valueToMatchWrapper = ExtractValueWrapper(aValueToMatch);
|
|
if (!valueToMatchWrapper) {
|
|
MOZ_ASSERT_UNREACHABLE("Value to match is empty");
|
|
return;
|
|
}
|
|
|
|
bool isServo = !valueToMatchWrapper->mServoValues.IsEmpty();
|
|
|
|
if (isServo) {
|
|
ServoAnimationValues zeroValues;
|
|
zeroValues.SetCapacity(valueToMatchWrapper->mServoValues.Length());
|
|
|
|
for (auto& valueToMatch : valueToMatchWrapper->mServoValues) {
|
|
RefPtr<RawServoAnimationValue> zeroValue =
|
|
Servo_AnimationValues_GetZeroValue(valueToMatch).Consume();
|
|
if (!zeroValue) {
|
|
return;
|
|
}
|
|
zeroValues.AppendElement(Move(zeroValue));
|
|
}
|
|
aValue.mU.mPtr = new ValueWrapper(valueToMatchWrapper->mPropID,
|
|
Move(zeroValues));
|
|
} else {
|
|
#ifdef MOZ_OLD_STYLE
|
|
const StyleAnimationValue* zeroValue =
|
|
GetZeroValueForUnit(valueToMatchWrapper->mGeckoValue.GetUnit());
|
|
if (!zeroValue) {
|
|
return;
|
|
}
|
|
aValue.mU.mPtr = new ValueWrapper(valueToMatchWrapper->mPropID,
|
|
*zeroValue);
|
|
#else
|
|
MOZ_CRASH("old style system disabled");
|
|
#endif
|
|
}
|
|
}
|