зеркало из https://github.com/mozilla/gecko-dev.git
573 строки
20 KiB
C++
573 строки
20 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 "SMILCSSValueType.h"
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#include "nsComputedDOMStyle.h"
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#include "nsColor.h"
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#include "nsCSSProps.h"
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#include "nsCSSValue.h"
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#include "nsDebug.h"
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#include "nsPresContext.h"
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#include "nsString.h"
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#include "nsStyleUtil.h"
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#include "mozilla/DeclarationBlock.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/PresShellInlines.h"
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#include "mozilla/ServoBindings.h"
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#include "mozilla/StyleAnimationValue.h"
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#include "mozilla/ServoCSSParser.h"
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#include "mozilla/ServoStyleSet.h"
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#include "mozilla/SMILParserUtils.h"
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#include "mozilla/SMILValue.h"
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#include "mozilla/dom/BaseKeyframeTypesBinding.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/Element.h"
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using namespace mozilla::dom;
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namespace mozilla {
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typedef AutoTArray<RefPtr<RawServoAnimationValue>, 1> ServoAnimationValues;
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/*static*/
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SMILCSSValueType SMILCSSValueType::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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MOZ_ASSERT(!aValue.IsNull());
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mServoValues.AppendElement(aValue.mServo);
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}
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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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if (mPropID != aOther.mPropID) {
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return false;
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}
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MOZ_ASSERT(!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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bool operator!=(const ValueWrapper& aOther) const {
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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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};
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// Helper Methods
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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 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
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// RefPtr<RawServoAnimationValue>. This is used where we may need to allocate a
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// new ServoAnimationValue to 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 FinalizeServoAnimationValues(
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const RefPtr<RawServoAnimationValue>*& aValue1,
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const RefPtr<RawServoAnimationValue>*& aValue2,
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RefPtr<RawServoAnimationValue>& aZeroValueStorage) {
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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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static ValueWrapper* ExtractValueWrapper(SMILValue& aValue) {
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return static_cast<ValueWrapper*>(aValue.mU.mPtr);
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}
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static const ValueWrapper* ExtractValueWrapper(const SMILValue& aValue) {
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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 SMILCSSValueType::Init(SMILValue& aValue) const {
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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 SMILCSSValueType::Destroy(SMILValue& aValue) const {
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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 = SMILNullType::Singleton();
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}
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nsresult SMILCSSValueType::Assign(SMILValue& aDest,
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const SMILValue& aSrc) const {
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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 SMILCSSValueType::IsEqual(const SMILValue& aLeft,
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const SMILValue& aRight) const {
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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 SMILValues 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 AddOrAccumulateForServo(SMILValue& 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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nsCSSPropertyID property =
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aValueToAddWrapper ? aValueToAddWrapper->mPropID : aDestWrapper->mPropID;
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size_t len = aValueToAddWrapper ? 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 ? &aValueToAddWrapper->mServoValues[i] : nullptr;
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const RefPtr<RawServoAnimationValue>* destValue =
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aDestWrapper ? &aDestWrapper->mServoValues[i] : nullptr;
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RefPtr<RawServoAnimationValue> zeroValueStorage;
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if (!FinalizeServoAnimationValues(valueToAdd, destValue,
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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, *valueToAdd, aCount)
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.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 AddOrAccumulate(SMILValue& aDest, const SMILValue& aValueToAdd,
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CompositeOperation aCompositeOp, uint64_t aCount) {
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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 == &SMILCSSValueType::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 =
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valueToAddWrapper ? valueToAddWrapper->mPropID : 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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return AddOrAccumulateForServo(aDest, valueToAddWrapper, destWrapper,
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aCompositeOp, aCount);
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}
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nsresult SMILCSSValueType::SandwichAdd(SMILValue& aDest,
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const SMILValue& aValueToAdd) const {
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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 SMILCSSValueType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
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uint32_t aCount) const {
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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 ComputeDistanceForServo(const ValueWrapper* aFromWrapper,
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const ValueWrapper& aToWrapper,
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double& aDistance) {
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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 =
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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 SMILCSSValueType::ComputeDistance(const SMILValue& aFrom,
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const SMILValue& aTo,
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double& aDistance) const {
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MOZ_ASSERT(aFrom.mType == aTo.mType, "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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return ComputeDistanceForServo(fromWrapper, *toWrapper, aDistance);
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}
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static nsresult InterpolateForServo(const ValueWrapper* aStartWrapper,
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const ValueWrapper& aEndWrapper,
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double aUnitDistance, SMILValue& aResult) {
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// For discretely-animated properties Servo_AnimationValues_Interpolate will
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// perform the discrete animation (i.e. 50% flip) and return a success result.
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// However, SMIL has its own special discrete animation behavior that it uses
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// when keyTimes are specified, but we won't run that unless that this method
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// returns a failure to indicate that the property cannot be smoothly
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// interpolated, i.e. that we need to use a discrete calcMode.
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//
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// For shorthands, Servo_Property_IsDiscreteAnimatable will always return
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// false. That's fine since most shorthands (like 'font' and
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// 'text-decoration') include non-discrete components. If authors want to
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// treat all components as discrete then they should use calcMode="discrete".
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if (Servo_Property_IsDiscreteAnimatable(aEndWrapper.mPropID)) {
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return NS_ERROR_FAILURE;
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}
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ServoAnimationValues results;
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size_t len = aEndWrapper.mServoValues.Length();
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results.SetCapacity(len);
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MOZ_ASSERT(!aStartWrapper || aStartWrapper->mServoValues.Length() == len,
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"Start and end values length should be the same if "
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"the start value exists");
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for (size_t i = 0; i < len; i++) {
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const RefPtr<RawServoAnimationValue>* startValue =
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aStartWrapper ? &aStartWrapper->mServoValues[i] : nullptr;
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const RefPtr<RawServoAnimationValue>* endValue =
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&aEndWrapper.mServoValues[i];
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RefPtr<RawServoAnimationValue> zeroValueStorage;
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if (!FinalizeServoAnimationValues(startValue, endValue, zeroValueStorage)) {
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return NS_ERROR_FAILURE;
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}
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RefPtr<RawServoAnimationValue> result =
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Servo_AnimationValues_Interpolate(*startValue, *endValue, aUnitDistance)
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.Consume();
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if (!result) {
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return NS_ERROR_FAILURE;
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}
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results.AppendElement(result);
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}
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aResult.mU.mPtr = new ValueWrapper(aEndWrapper.mPropID, std::move(results));
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return NS_OK;
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}
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nsresult SMILCSSValueType::Interpolate(const SMILValue& aStartVal,
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const SMILValue& aEndVal,
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double aUnitDistance,
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SMILValue& aResult) const {
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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, "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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return InterpolateForServo(startWrapper, *endWrapper, aUnitDistance, aResult);
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}
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static ServoAnimationValues ValueFromStringHelper(nsCSSPropertyID aPropID,
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Element* aTargetElement,
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nsPresContext* aPresContext,
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ComputedStyle* aComputedStyle,
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const nsAString& aString) {
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ServoAnimationValues result;
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Document* doc = aTargetElement->GetComposedDoc();
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if (!doc) {
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return result;
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}
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// Parse property
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ServoCSSParser::ParsingEnvironment env =
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ServoCSSParser::GetParsingEnvironment(doc);
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RefPtr<RawServoDeclarationBlock> servoDeclarationBlock =
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ServoCSSParser::ParseProperty(aPropID, aString, env,
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ParsingMode::AllowUnitlessLength |
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ParsingMode::AllowAllNumericValues);
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if (!servoDeclarationBlock) {
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return result;
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}
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// Compute value
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aPresContext->StyleSet()->GetAnimationValues(
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servoDeclarationBlock, aTargetElement, aComputedStyle, result);
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return result;
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}
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// static
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void SMILCSSValueType::ValueFromString(nsCSSPropertyID aPropID,
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Element* aTargetElement,
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const nsAString& aString,
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SMILValue& aValue,
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bool* aIsContextSensitive) {
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MOZ_ASSERT(aValue.IsNull(), "Outparam should be null-typed");
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nsPresContext* presContext =
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nsContentUtils::GetContextForContent(aTargetElement);
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if (!presContext) {
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NS_WARNING("Not parsing animation value; unable to get PresContext");
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return;
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}
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Document* doc = aTargetElement->GetComposedDoc();
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if (doc && !nsStyleUtil::CSPAllowsInlineStyle(nullptr, doc, nullptr, 0, 0,
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aString, nullptr)) {
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return;
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}
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RefPtr<ComputedStyle> computedStyle =
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nsComputedDOMStyle::GetComputedStyle(aTargetElement, nullptr);
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if (!computedStyle) {
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return;
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}
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ServoAnimationValues parsedValues = ValueFromStringHelper(
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aPropID, aTargetElement, presContext, computedStyle, aString);
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if (aIsContextSensitive) {
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// FIXME: Bug 1358955 - detect context-sensitive values and set this value
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// appropriately.
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*aIsContextSensitive = false;
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}
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if (!parsedValues.IsEmpty()) {
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sSingleton.Init(aValue);
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aValue.mU.mPtr = new ValueWrapper(aPropID, std::move(parsedValues));
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}
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}
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// static
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SMILValue SMILCSSValueType::ValueFromAnimationValue(
|
|
nsCSSPropertyID aPropID, Element* aTargetElement,
|
|
const AnimationValue& aValue) {
|
|
SMILValue result;
|
|
|
|
Document* doc = aTargetElement->GetComposedDoc();
|
|
// 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, nullptr, 0, 0,
|
|
kPlaceholderText, nullptr)) {
|
|
return result;
|
|
}
|
|
|
|
sSingleton.Init(result);
|
|
result.mU.mPtr = new ValueWrapper(aPropID, aValue);
|
|
|
|
return result;
|
|
}
|
|
|
|
// static
|
|
bool SMILCSSValueType::SetPropertyValues(const SMILValue& aValue,
|
|
DeclarationBlock& aDecl) {
|
|
MOZ_ASSERT(aValue.mType == &SMILCSSValueType::sSingleton,
|
|
"Unexpected SMIL value type");
|
|
const ValueWrapper* wrapper = ExtractValueWrapper(aValue);
|
|
if (!wrapper) {
|
|
return false;
|
|
}
|
|
|
|
bool changed = false;
|
|
for (const auto& value : wrapper->mServoValues) {
|
|
changed |= Servo_DeclarationBlock_SetPropertyToAnimationValue(aDecl.Raw(),
|
|
value, {});
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
// static
|
|
nsCSSPropertyID SMILCSSValueType::PropertyFromValue(const SMILValue& aValue) {
|
|
if (aValue.mType != &SMILCSSValueType::sSingleton) {
|
|
return eCSSProperty_UNKNOWN;
|
|
}
|
|
|
|
const ValueWrapper* wrapper = ExtractValueWrapper(aValue);
|
|
if (!wrapper) {
|
|
return eCSSProperty_UNKNOWN;
|
|
}
|
|
|
|
return wrapper->mPropID;
|
|
}
|
|
|
|
// static
|
|
void SMILCSSValueType::FinalizeValue(SMILValue& aValue,
|
|
const SMILValue& aValueToMatch) {
|
|
MOZ_ASSERT(aValue.mType == aValueToMatch.mType, "Incompatible SMIL types");
|
|
MOZ_ASSERT(aValue.mType == &SMILCSSValueType::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;
|
|
}
|
|
|
|
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(std::move(zeroValue));
|
|
}
|
|
aValue.mU.mPtr =
|
|
new ValueWrapper(valueToMatchWrapper->mPropID, std::move(zeroValues));
|
|
}
|
|
|
|
} // namespace mozilla
|