// static
void
nsSMILCSSValueType::ValueFromString(nsCSSPropertyID aPropID,
Element* aTargetElement,
const nsAString& aString,
nsSMILValue& aValue,
bool* aIsContextSensitive)
{
MOZ_ASSERT(aValue.IsNull(), "Outparam should be null-typed");
nsPresContext* presContext = GetPresContextForElement(aTargetElement);
if (!presContext) {
NS_WARNING("Not parsing animation value; unable to get PresContext");
return;
}
nsIDocument* doc = aTargetElement->GetUncomposedDoc();
if (doc && !nsStyleUtil::CSPAllowsInlineStyle(nullptr,
doc->NodePrincipal(),
doc->GetDocumentURI(),
0, aString, nullptr)) {
return;
}
RefPtr<nsStyleContext> styleContext =
nsComputedDOMStyle::GetStyleContext(aTargetElement, nullptr,
presContext->PresShell());
if (!styleContext) {
return;
}
if (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;
}
StyleAnimationValue parsedValue;
if (ValueFromStringHelper(aPropID, aTargetElement, presContext,
styleContext->AsGecko(), aString, parsedValue,
aIsContextSensitive)) {
sSingleton.Init(aValue);
aValue.mU.mPtr = new ValueWrapper(aPropID, parsedValue);
}
}
void
nsTransitionManager::StyleContextChanged(dom::Element *aElement,
GeckoStyleContext* aOldStyleContext,
RefPtr<GeckoStyleContext>* aNewStyleContext /* inout */)
{
GeckoStyleContext* newStyleContext = *aNewStyleContext;
NS_PRECONDITION(aOldStyleContext->GetPseudo() == newStyleContext->GetPseudo(),
"pseudo type mismatch");
if (mInAnimationOnlyStyleUpdate) {
// If we're doing an animation-only style update, return, since the
// purpose of an animation-only style update is to update only the
// animation styles so that we don't consider style changes
// resulting from changes in the animation time for starting a
// transition.
return;
}
if (!mPresContext->IsDynamic()) {
// For print or print preview, ignore transitions.
return;
}
if (aOldStyleContext->HasPseudoElementData() !=
newStyleContext->HasPseudoElementData()) {
// If the old style context and new style context differ in terms of
// whether they're inside ::first-letter, ::first-line, or similar,
// bail. We can't hit this codepath for normal style changes
// involving moving frames around the boundaries of these
// pseudo-elements since we don't call StyleContextChanged from
// ReparentStyleContext. However, we can hit this codepath during
// the handling of transitions that start across reframes.
//
// While there isn't an easy *perfect* way to handle this case, err
// on the side of missing some transitions that we ought to have
// rather than having bogus transitions that we shouldn't.
//
// We could consider changing this handling, although it's worth
// thinking about whether the code below could do anything weird in
// this case.
return;
}
// NOTE: Things in this function (and ConsiderInitiatingTransition)
// should never call PeekStyleData because we don't preserve gotten
// structs across reframes.
// Return sooner (before the startedAny check below) for the most
// common case: no transitions specified or running.
const nsStyleDisplay* disp = newStyleContext->StyleDisplay();
CSSPseudoElementType pseudoType = newStyleContext->GetPseudoType();
if (pseudoType != CSSPseudoElementType::NotPseudo) {
if (pseudoType != CSSPseudoElementType::before &&
pseudoType != CSSPseudoElementType::after) {
return;
}
NS_ASSERTION((pseudoType == CSSPseudoElementType::before &&
aElement->IsGeneratedContentContainerForBefore()) ||
(pseudoType == CSSPseudoElementType::after &&
aElement->IsGeneratedContentContainerForAfter()),
"Unexpected aElement coming through");
// Else the element we want to use from now on is the element the
// :before or :after is attached to.
aElement = aElement->GetParent()->AsElement();
}
CSSTransitionCollection* collection =
CSSTransitionCollection::GetAnimationCollection(aElement, pseudoType);
if (!collection &&
disp->mTransitionPropertyCount == 1 &&
disp->GetTransitionCombinedDuration(0) <= 0.0f) {
return;
}
MOZ_ASSERT(mPresContext->RestyleManager()->IsGecko(),
"ServoRestyleManager should not use nsTransitionManager "
"for transitions");
if (collection &&
collection->mCheckGeneration ==
mPresContext->RestyleManager()->GetAnimationGeneration()) {
// When we start a new transition, we immediately post a restyle.
// If the animation generation on the collection is current, that
// means *this* is that restyle, since we bump the animation
// generation on the restyle manager whenever there's a real style
// change (i.e., one where mInAnimationOnlyStyleUpdate isn't true,
// which causes us to return above). Thus we shouldn't do anything.
return;
}
if (newStyleContext->GetParent() &&
newStyleContext->GetParent()->HasPseudoElementData()) {
// Ignore transitions on things that inherit properties from
// pseudo-elements.
// FIXME (Bug 522599): Add tests for this.
return;
}
NS_WARNING_ASSERTION(
!mPresContext->EffectCompositor()->HasThrottledStyleUpdates(),
"throttled animations not up to date");
// Compute what the css-transitions spec calls the "after-change
// style", which is the new style without any data from transitions,
// but still inheriting from data that contains transitions that are
// not stopping or starting right now.
RefPtr<GeckoStyleContext> afterChangeStyle;
if (collection) {
MOZ_ASSERT(mPresContext->StyleSet()->IsGecko(),
"ServoStyleSets should not use nsTransitionManager "
"for transitions");
nsStyleSet* styleSet = mPresContext->StyleSet()->AsGecko();
afterChangeStyle =
styleSet->ResolveStyleByRemovingAnimation(aElement, newStyleContext,
eRestyle_CSSTransitions);
} else {
afterChangeStyle = newStyleContext;
}
nsAutoAnimationMutationBatch mb(aElement->OwnerDoc());
DebugOnly<bool> startedAny = false;
// We don't have to update transitions if display:none, although we will
// cancel them after restyling.
if (!afterChangeStyle->IsInDisplayNoneSubtree()) {
startedAny = DoUpdateTransitions(*disp,
aElement,
afterChangeStyle->GetPseudoType(),
collection,
aOldStyleContext->AsGecko(),
afterChangeStyle->AsGecko());
}
MOZ_ASSERT(!startedAny || collection,
"must have element transitions if we started any transitions");
EffectCompositor::CascadeLevel cascadeLevel =
EffectCompositor::CascadeLevel::Transitions;
if (collection) {
collection->UpdateCheckGeneration(mPresContext);
mPresContext->EffectCompositor()->MaybeUpdateAnimationRule(aElement,
pseudoType,
cascadeLevel,
newStyleContext);
}
// We want to replace the new style context with the after-change style.
*aNewStyleContext = afterChangeStyle;
if (collection) {
// Since we have transition styles, we have to undo this replacement.
// The check of collection->mCheckGeneration against the restyle
// manager's GetAnimationGeneration() will ensure that we don't go
// through the rest of this function again when we do.
mPresContext->EffectCompositor()->PostRestyleForAnimation(aElement,
pseudoType,
cascadeLevel);
}
}