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Bug 1166500 - Part 1: Store change hints between from and to for each animation segment. r=dbaron
BuildSegmentsFromValueEntries now needs base nsStyleContext to calculate the change hints. If the change hint is not set correctly, we will check it in CanIgnoreIfNotVisible() introduced in a subsequent patch (part 3).
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@ -8,6 +8,7 @@
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#define mozilla_dom_KeyframeEffect_h
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#include "nsAutoPtr.h"
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#include "nsChangeHint.h"
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#include "nsCSSProperty.h"
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#include "nsCSSValue.h"
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#include "nsCycleCollectionParticipant.h"
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@ -118,6 +119,8 @@ struct AnimationPropertySegment
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StyleAnimationValue mFromValue, mToValue;
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Maybe<ComputedTimingFunction> mTimingFunction;
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nsChangeHint mChangeHint;
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bool operator==(const AnimationPropertySegment& aOther) const {
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return mFromKey == aOther.mFromKey &&
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mToKey == aOther.mToKey &&
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@ -373,7 +373,8 @@ static bool
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HasValidOffsets(const nsTArray<Keyframe>& aKeyframes);
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static void
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BuildSegmentsFromValueEntries(nsTArray<KeyframeValueEntry>& aEntries,
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BuildSegmentsFromValueEntries(nsStyleContext* aStyleContext,
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nsTArray<KeyframeValueEntry>& aEntries,
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nsTArray<AnimationProperty>& aResult);
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static void
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@ -550,7 +551,7 @@ KeyframeUtils::GetAnimationPropertiesFromKeyframes(
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}
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nsTArray<AnimationProperty> result;
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BuildSegmentsFromValueEntries(entries, result);
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BuildSegmentsFromValueEntries(aStyleContext, entries, result);
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return result;
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}
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@ -908,12 +909,43 @@ HasValidOffsets(const nsTArray<Keyframe>& aKeyframes)
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return true;
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}
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static already_AddRefed<nsStyleContext>
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CreateStyleContextForAnimationValue(nsCSSProperty aProperty,
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StyleAnimationValue aValue,
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nsStyleContext* aBaseStyleContext)
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{
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MOZ_ASSERT(aBaseStyleContext,
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"CreateStyleContextForAnimationValue needs to be called "
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"with a valid nsStyleContext");
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RefPtr<AnimValuesStyleRule> styleRule = new AnimValuesStyleRule();
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styleRule->AddValue(aProperty, aValue);
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nsCOMArray<nsIStyleRule> rules;
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rules.AppendObject(styleRule);
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MOZ_ASSERT(aBaseStyleContext->PresContext()->StyleSet()->IsGecko(),
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"ServoStyleSet should not use StyleAnimationValue for animations");
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nsStyleSet* styleSet =
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aBaseStyleContext->PresContext()->StyleSet()->AsGecko();
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RefPtr<nsStyleContext> styleContext =
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styleSet->ResolveStyleByAddingRules(aBaseStyleContext, rules);
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// We need to call StyleData to generate cached data for the style context.
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// Otherwise CalcStyleDifference returns no meaningful result.
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styleContext->StyleData(nsCSSProps::kSIDTable[aProperty]);
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return styleContext.forget();
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}
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/**
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* Builds an array of AnimationProperty objects to represent the keyframe
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* animation segments in aEntries.
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*/
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static void
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BuildSegmentsFromValueEntries(nsTArray<KeyframeValueEntry>& aEntries,
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BuildSegmentsFromValueEntries(nsStyleContext* aStyleContext,
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nsTArray<KeyframeValueEntry>& aEntries,
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nsTArray<AnimationProperty>& aResult)
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{
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if (aEntries.IsEmpty()) {
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@ -1004,6 +1036,22 @@ BuildSegmentsFromValueEntries(nsTArray<KeyframeValueEntry>& aEntries,
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segment->mToValue = aEntries[j].mValue;
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segment->mTimingFunction = aEntries[i].mTimingFunction;
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RefPtr<nsStyleContext> fromContext =
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CreateStyleContextForAnimationValue(animationProperty->mProperty,
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segment->mFromValue, aStyleContext);
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RefPtr<nsStyleContext> toContext =
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CreateStyleContextForAnimationValue(animationProperty->mProperty,
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segment->mToValue, aStyleContext);
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uint32_t equalStructs = 0;
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uint32_t samePointerStructs = 0;
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segment->mChangeHint =
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fromContext->CalcStyleDifference(toContext,
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nsChangeHint(0),
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&equalStructs,
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&samePointerStructs);
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i = j;
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}
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}
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