/usr/include/thunderbird/mozilla/dom/KeyframeEffectReadOnly.h is in thunderbird-dev 1:52.8.0-1~deb8u1.
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_dom_KeyframeEffectReadOnly_h
#define mozilla_dom_KeyframeEffectReadOnly_h
#include "nsChangeHint.h"
#include "nsCSSPropertyID.h"
#include "nsCSSValue.h"
#include "nsCycleCollectionParticipant.h"
#include "nsTArray.h"
#include "nsWrapperCache.h"
#include "mozilla/AnimationPerformanceWarning.h"
#include "mozilla/AnimationTarget.h"
#include "mozilla/Attributes.h"
#include "mozilla/ComputedTimingFunction.h"
#include "mozilla/EffectCompositor.h"
#include "mozilla/KeyframeEffectParams.h"
#include "mozilla/LayerAnimationInfo.h" // LayerAnimations::kRecords
#include "mozilla/ServoBindingTypes.h" // RawServoDeclarationBlock and
// associated RefPtrTraits
#include "mozilla/StyleAnimationValue.h"
#include "mozilla/dom/AnimationEffectReadOnly.h"
#include "mozilla/dom/Element.h"
struct JSContext;
class JSObject;
class nsCSSPropertyIDSet;
class nsIContent;
class nsIDocument;
class nsIFrame;
class nsIPresShell;
class nsPresContext;
namespace mozilla {
class AnimValuesStyleRule;
enum class CSSPseudoElementType : uint8_t;
class ErrorResult;
struct TimingParams;
namespace dom {
class ElementOrCSSPseudoElement;
class GlobalObject;
class OwningElementOrCSSPseudoElement;
class UnrestrictedDoubleOrKeyframeAnimationOptions;
class UnrestrictedDoubleOrKeyframeEffectOptions;
enum class IterationCompositeOperation : uint32_t;
enum class CompositeOperation : uint32_t;
struct AnimationPropertyDetails;
}
/**
* A property-value pair specified on a keyframe.
*/
struct PropertyValuePair
{
nsCSSPropertyID mProperty;
// The specified value for the property. For shorthand properties or invalid
// property values, we store the specified property value as a token stream
// (string).
nsCSSValue mValue;
// The specified value when using the Servo backend. However, even when
// using the Servo backend, we still fill in |mValue| in the case where we
// fail to parse the value since we use it to store the original string.
RefPtr<RawServoDeclarationBlock> mServoDeclarationBlock;
bool operator==(const PropertyValuePair&) const;
};
/**
* A single keyframe.
*
* This is the canonical form in which keyframe effects are stored and
* corresponds closely to the type of objects returned via the getKeyframes()
* API.
*
* Before computing an output animation value, however, we flatten these frames
* down to a series of per-property value arrays where we also resolve any
* overlapping shorthands/longhands, convert specified CSS values to computed
* values, etc.
*
* When the target element or style context changes, however, we rebuild these
* per-property arrays from the original list of keyframes objects. As a result,
* these objects represent the master definition of the effect's values.
*/
struct Keyframe
{
Keyframe() = default;
Keyframe(const Keyframe& aOther) = default;
Keyframe(Keyframe&& aOther)
{
*this = Move(aOther);
}
Keyframe& operator=(const Keyframe& aOther) = default;
Keyframe& operator=(Keyframe&& aOther)
{
mOffset = aOther.mOffset;
mComputedOffset = aOther.mComputedOffset;
mTimingFunction = Move(aOther.mTimingFunction);
mPropertyValues = Move(aOther.mPropertyValues);
return *this;
}
Maybe<double> mOffset;
static constexpr double kComputedOffsetNotSet = -1.0;
double mComputedOffset = kComputedOffsetNotSet;
Maybe<ComputedTimingFunction> mTimingFunction; // Nothing() here means
// "linear"
nsTArray<PropertyValuePair> mPropertyValues;
};
struct AnimationPropertySegment
{
float mFromKey, mToKey;
StyleAnimationValue mFromValue, mToValue;
Maybe<ComputedTimingFunction> mTimingFunction;
bool operator==(const AnimationPropertySegment& aOther) const
{
return mFromKey == aOther.mFromKey &&
mToKey == aOther.mToKey &&
mFromValue == aOther.mFromValue &&
mToValue == aOther.mToValue &&
mTimingFunction == aOther.mTimingFunction;
}
bool operator!=(const AnimationPropertySegment& aOther) const
{
return !(*this == aOther);
}
};
struct AnimationProperty
{
nsCSSPropertyID mProperty = eCSSProperty_UNKNOWN;
// If true, the propery is currently being animated on the compositor.
//
// Note that when the owning Animation requests a non-throttled restyle, in
// between calling RequestRestyle on its EffectCompositor and when the
// restyle is performed, this member may temporarily become false even if
// the animation remains on the layer after the restyle.
//
// **NOTE**: This member is not included when comparing AnimationProperty
// objects for equality.
bool mIsRunningOnCompositor = false;
Maybe<AnimationPerformanceWarning> mPerformanceWarning;
InfallibleTArray<AnimationPropertySegment> mSegments;
// The copy constructor/assignment doesn't copy mIsRunningOnCompositor and
// mPerformanceWarning.
AnimationProperty() = default;
AnimationProperty(const AnimationProperty& aOther)
: mProperty(aOther.mProperty), mSegments(aOther.mSegments) { }
AnimationProperty& operator=(const AnimationProperty& aOther)
{
mProperty = aOther.mProperty;
mSegments = aOther.mSegments;
return *this;
}
// NOTE: This operator does *not* compare the mIsRunningOnCompositor member.
// This is because AnimationProperty objects are compared when recreating
// CSS animations to determine if mutation observer change records need to
// be created or not. However, at the point when these objects are compared
// the mIsRunningOnCompositor will not have been set on the new objects so
// we ignore this member to avoid generating spurious change records.
bool operator==(const AnimationProperty& aOther) const
{
return mProperty == aOther.mProperty &&
mSegments == aOther.mSegments;
}
bool operator!=(const AnimationProperty& aOther) const
{
return !(*this == aOther);
}
};
struct ElementPropertyTransition;
namespace dom {
class Animation;
class KeyframeEffectReadOnly : public AnimationEffectReadOnly
{
public:
KeyframeEffectReadOnly(nsIDocument* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
const TimingParams& aTiming,
const KeyframeEffectParams& aOptions);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(KeyframeEffectReadOnly,
AnimationEffectReadOnly)
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
KeyframeEffectReadOnly* AsKeyframeEffect() override { return this; }
// KeyframeEffectReadOnly interface
static already_AddRefed<KeyframeEffectReadOnly>
Constructor(const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const UnrestrictedDoubleOrKeyframeEffectOptions& aOptions,
ErrorResult& aRv);
static already_AddRefed<KeyframeEffectReadOnly>
Constructor(const GlobalObject& aGlobal,
KeyframeEffectReadOnly& aSource,
ErrorResult& aRv);
void GetTarget(Nullable<OwningElementOrCSSPseudoElement>& aRv) const;
Maybe<NonOwningAnimationTarget> GetTarget() const
{
Maybe<NonOwningAnimationTarget> result;
if (mTarget) {
result.emplace(*mTarget);
}
return result;
}
void GetKeyframes(JSContext*& aCx,
nsTArray<JSObject*>& aResult,
ErrorResult& aRv);
void GetProperties(nsTArray<AnimationPropertyDetails>& aProperties,
ErrorResult& aRv) const;
IterationCompositeOperation IterationComposite() const;
CompositeOperation Composite() const;
void GetSpacing(nsString& aRetVal) const
{
mEffectOptions.GetSpacingAsString(aRetVal);
}
void NotifyAnimationTimingUpdated();
void SetAnimation(Animation* aAnimation) override;
void SetKeyframes(JSContext* aContext, JS::Handle<JSObject*> aKeyframes,
ErrorResult& aRv);
void SetKeyframes(nsTArray<Keyframe>&& aKeyframes,
nsStyleContext* aStyleContext);
// Returns true if the effect includes |aProperty| regardless of whether the
// property is overridden by !important rule.
bool HasAnimationOfProperty(nsCSSPropertyID aProperty) const;
// GetEffectiveAnimationOfProperty returns AnimationProperty corresponding
// to a given CSS property if the effect includes the property and the
// property is not overridden by !important rules.
// Also EffectiveAnimationOfProperty returns true under the same condition.
//
// NOTE: We don't currently check for !important rules for properties that
// can't run on the compositor.
bool HasEffectiveAnimationOfProperty(nsCSSPropertyID aProperty) const
{
return GetEffectiveAnimationOfProperty(aProperty) != nullptr;
}
const AnimationProperty* GetEffectiveAnimationOfProperty(
nsCSSPropertyID aProperty) const;
const InfallibleTArray<AnimationProperty>& Properties() const
{
return mProperties;
}
// Update |mProperties| by recalculating from |mKeyframes| using
// |aStyleContext| to resolve specified values.
void UpdateProperties(nsStyleContext* aStyleContext);
// Updates |aStyleRule| with the animation values produced by this
// AnimationEffect for the current time except any properties contained
// in |aPropertiesToSkip|.
void ComposeStyle(RefPtr<AnimValuesStyleRule>& aStyleRule,
const nsCSSPropertyIDSet& aPropertiesToSkip);
// Returns true if at least one property is being animated on compositor.
bool IsRunningOnCompositor() const;
void SetIsRunningOnCompositor(nsCSSPropertyID aProperty, bool aIsRunning);
void ResetIsRunningOnCompositor();
// Returns true if this effect, applied to |aFrame|, contains properties
// that mean we shouldn't run transform compositor animations on this element.
//
// For example, if we have an animation of geometric properties like 'left'
// and 'top' on an element, we force all 'transform' animations running at
// the same time on the same element to run on the main thread.
//
// When returning true, |aPerformanceWarning| stores the reason why
// we shouldn't run the transform animations.
bool ShouldBlockAsyncTransformAnimations(
const nsIFrame* aFrame,
AnimationPerformanceWarning::Type& aPerformanceWarning) const;
nsIDocument* GetRenderedDocument() const;
nsPresContext* GetPresContext() const;
nsIPresShell* GetPresShell() const;
// Associates a warning with the animated property on the specified frame
// indicating why, for example, the property could not be animated on the
// compositor. |aParams| and |aParamsLength| are optional parameters which
// will be used to generate a localized message for devtools.
void SetPerformanceWarning(
nsCSSPropertyID aProperty,
const AnimationPerformanceWarning& aWarning);
// Cumulative change hint on each segment for each property.
// This is used for deciding the animation is paint-only.
void CalculateCumulativeChangeHint(nsStyleContext* aStyleContext);
// Returns true if all of animation properties' change hints
// can ignore painting if the animation is not visible.
// See nsChangeHint_Hints_CanIgnoreIfNotVisible in nsChangeHint.h
// in detail which change hint can be ignored.
bool CanIgnoreIfNotVisible() const;
protected:
KeyframeEffectReadOnly(nsIDocument* aDocument,
const Maybe<OwningAnimationTarget>& aTarget,
AnimationEffectTimingReadOnly* aTiming,
const KeyframeEffectParams& aOptions);
~KeyframeEffectReadOnly() override = default;
static Maybe<OwningAnimationTarget>
ConvertTarget(const Nullable<ElementOrCSSPseudoElement>& aTarget);
template<class KeyframeEffectType, class OptionsType>
static already_AddRefed<KeyframeEffectType>
ConstructKeyframeEffect(const GlobalObject& aGlobal,
const Nullable<ElementOrCSSPseudoElement>& aTarget,
JS::Handle<JSObject*> aKeyframes,
const OptionsType& aOptions,
ErrorResult& aRv);
template<class KeyframeEffectType>
static already_AddRefed<KeyframeEffectType>
ConstructKeyframeEffect(const GlobalObject& aGlobal,
KeyframeEffectReadOnly& aSource,
ErrorResult& aRv);
// Build properties by recalculating from |mKeyframes| using |aStyleContext|
// to resolve specified values. This function also applies paced spacing if
// needed.
nsTArray<AnimationProperty> BuildProperties(nsStyleContext* aStyleContext);
// This effect is registered with its target element so long as:
//
// (a) It has a target element, and
// (b) It is "relevant" (i.e. yet to finish but not idle, or finished but
// filling forwards)
//
// As a result, we need to make sure this gets called whenever anything
// changes with regards to this effects's timing including changes to the
// owning Animation's timing.
void UpdateTargetRegistration();
// Remove the current effect target from its EffectSet.
void UnregisterTarget();
void RequestRestyle(EffectCompositor::RestyleType aRestyleType);
// Update the associated frame state bits so that, if necessary, a stacking
// context will be created and the effect sent to the compositor. We
// typically need to do this when the properties referenced by the keyframe
// have changed, or when the target frame might have changed.
void MaybeUpdateFrameForCompositor();
// Looks up the style context associated with the target element, if any.
// We need to be careful to *not* call this when we are updating the style
// context. That's because calling GetStyleContextForElement when we are in
// the process of building a style context may trigger various forms of
// infinite recursion.
already_AddRefed<nsStyleContext>
GetTargetStyleContext();
// A wrapper for marking cascade update according to the current
// target and its effectSet.
void MarkCascadeNeedsUpdate();
Maybe<OwningAnimationTarget> mTarget;
KeyframeEffectParams mEffectOptions;
// The specified keyframes.
nsTArray<Keyframe> mKeyframes;
// A set of per-property value arrays, derived from |mKeyframes|.
nsTArray<AnimationProperty> mProperties;
// The computed progress last time we composed the style rule. This is
// used to detect when the progress is not changing (e.g. due to a step
// timing function) so we can avoid unnecessary style updates.
Nullable<double> mProgressOnLastCompose;
// The purpose of this value is the same as mProgressOnLastCompose but
// this is used to detect when the current iteration is not changing
// in the case when iterationComposite is accumulate.
uint64_t mCurrentIterationOnLastCompose = 0;
// We need to track when we go to or from being "in effect" since
// we need to re-evaluate the cascade of animations when that changes.
bool mInEffectOnLastAnimationTimingUpdate;
private:
nsChangeHint mCumulativeChangeHint;
nsIFrame* GetAnimationFrame() const;
bool CanThrottle() const;
bool CanThrottleTransformChanges(nsIFrame& aFrame) const;
// Returns true if the computedTiming has changed since the last
// composition.
bool HasComputedTimingChanged() const;
// Returns true unless Gecko limitations prevent performing transform
// animations for |aFrame|. When returning true, the reason for the
// limitation is stored in |aOutPerformanceWarning|.
static bool CanAnimateTransformOnCompositor(
const nsIFrame* aFrame,
AnimationPerformanceWarning::Type& aPerformanceWarning);
static bool IsGeometricProperty(const nsCSSPropertyID aProperty);
static const TimeDuration OverflowRegionRefreshInterval();
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_KeyframeEffectReadOnly_h
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