gecko-dev/layout/style/AnimationCommon.h

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/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
/* 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_css_AnimationCommon_h
#define mozilla_css_AnimationCommon_h
#include "nsIStyleRuleProcessor.h"
#include "nsIStyleRule.h"
#include "nsRefreshDriver.h"
#include "prclist.h"
#include "nsStyleAnimation.h"
#include "nsCSSProperty.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/dom/Element.h"
#include "nsSMILKeySpline.h"
#include "nsStyleStruct.h"
#include "mozilla/Attributes.h"
class nsPresContext;
class nsIFrame;
namespace mozilla {
namespace css {
bool IsGeometricProperty(nsCSSProperty aProperty);
struct CommonElementAnimationData;
class CommonAnimationManager : public nsIStyleRuleProcessor,
public nsARefreshObserver {
public:
CommonAnimationManager(nsPresContext *aPresContext);
virtual ~CommonAnimationManager();
// nsISupports
NS_DECL_ISUPPORTS
// nsIStyleRuleProcessor (parts)
virtual nsRestyleHint HasStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
virtual bool HasDocumentStateDependentStyle(StateRuleProcessorData* aData) MOZ_OVERRIDE;
virtual nsRestyleHint
HasAttributeDependentStyle(AttributeRuleProcessorData* aData) MOZ_OVERRIDE;
virtual bool MediumFeaturesChanged(nsPresContext* aPresContext) MOZ_OVERRIDE;
virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)
const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf)
const MOZ_MUST_OVERRIDE MOZ_OVERRIDE;
/**
* Notify the manager that the pres context is going away.
*/
void Disconnect();
enum FlushFlags {
Can_Throttle,
Cannot_Throttle
};
static bool ExtractComputedValueForTransition(
nsCSSProperty aProperty,
nsStyleContext* aStyleContext,
nsStyleAnimation::Value& aComputedValue);
protected:
friend struct CommonElementAnimationData; // for ElementDataRemoved
virtual void AddElementData(CommonElementAnimationData* aData) = 0;
virtual void ElementDataRemoved() = 0;
void RemoveAllElementData();
PRCList mElementData;
nsPresContext *mPresContext; // weak (non-null from ctor to Disconnect)
};
/**
* A style rule that maps property-nsStyleAnimation::Value pairs.
*/
class AnimValuesStyleRule MOZ_FINAL : public nsIStyleRule
{
public:
// nsISupports implementation
NS_DECL_ISUPPORTS
// nsIStyleRule implementation
virtual void MapRuleInfoInto(nsRuleData* aRuleData) MOZ_OVERRIDE;
#ifdef DEBUG
virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
#endif
void AddValue(nsCSSProperty aProperty, nsStyleAnimation::Value &aStartValue)
{
PropertyValuePair v = { aProperty, aStartValue };
mPropertyValuePairs.AppendElement(v);
}
// Caller must fill in returned value.
nsStyleAnimation::Value* AddEmptyValue(nsCSSProperty aProperty)
{
PropertyValuePair *p = mPropertyValuePairs.AppendElement();
p->mProperty = aProperty;
return &p->mValue;
}
struct PropertyValuePair {
nsCSSProperty mProperty;
nsStyleAnimation::Value mValue;
};
private:
InfallibleTArray<PropertyValuePair> mPropertyValuePairs;
};
class ComputedTimingFunction {
public:
typedef nsTimingFunction::Type Type;
void Init(const nsTimingFunction &aFunction);
double GetValue(double aPortion) const;
const nsSMILKeySpline* GetFunction() const {
NS_ASSERTION(mType == nsTimingFunction::Function, "Type mismatch");
return &mTimingFunction;
}
Type GetType() const { return mType; }
uint32_t GetSteps() const { return mSteps; }
private:
Type mType;
nsSMILKeySpline mTimingFunction;
uint32_t mSteps;
};
struct CommonElementAnimationData : public PRCList
{
CommonElementAnimationData(dom::Element *aElement, nsIAtom *aElementProperty,
CommonAnimationManager *aManager)
: mElement(aElement)
, mElementProperty(aElementProperty)
, mManager(aManager)
, mAnimationGeneration(0)
#ifdef DEBUG
, mCalledPropertyDtor(false)
#endif
{
MOZ_COUNT_CTOR(CommonElementAnimationData);
PR_INIT_CLIST(this);
}
~CommonElementAnimationData()
{
NS_ABORT_IF_FALSE(mCalledPropertyDtor,
"must call destructor through element property dtor");
MOZ_COUNT_DTOR(CommonElementAnimationData);
PR_REMOVE_LINK(this);
mManager->ElementDataRemoved();
}
void Destroy()
{
// This will call our destructor.
mElement->DeleteProperty(mElementProperty);
}
bool CanThrottleTransformChanges(mozilla::TimeStamp aTime);
bool CanThrottleAnimation(mozilla::TimeStamp aTime);
enum CanAnimateFlags {
// Testing for width, height, top, right, bottom, or left.
CanAnimate_HasGeometricProperty = 1,
// Allow the case where OMTA is allowed in general, but not for the
// specified property.
CanAnimate_AllowPartial = 2
};
static bool
CanAnimatePropertyOnCompositor(const dom::Element *aElement,
nsCSSProperty aProperty,
CanAnimateFlags aFlags);
static bool IsCompositorAnimationDisabledForFrame(nsIFrame* aFrame);
// True if this animation can be performed on the compositor thread.
// Do not pass CanAnimate_AllowPartial to make sure that all properties of this
// animation are supported by the compositor.
virtual bool CanPerformOnCompositorThread(CanAnimateFlags aFlags) const = 0;
virtual bool HasAnimationOfProperty(nsCSSProperty aProperty) const = 0;
static void LogAsyncAnimationFailure(nsCString& aMessage,
const nsIContent* aContent = nullptr);
dom::Element *mElement;
// the atom we use in mElement's prop table (must be a static atom,
// i.e., in an atom list)
nsIAtom *mElementProperty;
CommonAnimationManager *mManager;
// This style rule contains the style data for currently animating
// values. It only matches when styling with animation. When we
// style without animation, we need to not use it so that we can
// detect any new changes; if necessary we restyle immediately
// afterwards with animation.
// NOTE: If we don't need to apply any styles, mStyleRule will be
// null, but mStyleRuleRefreshTime will still be valid.
nsRefPtr<mozilla::css::AnimValuesStyleRule> mStyleRule;
// nsCSSFrameConstructor keeps track of the number of animation 'mini-flushes'
// (see nsTransitionManager::UpdateAllThrottledStyles()). mFlushCount is
// the last flush where a transition/animation changed. We keep a similar
// count on the corresponding layer so we can check that the layer is up to
// date with the animation manager.
uint64_t mAnimationGeneration;
// Update mFlushCount to nsCSSFrameConstructor's count
void UpdateAnimationGeneration(nsPresContext* aPresContext);
// The refresh time associated with mStyleRule.
TimeStamp mStyleRuleRefreshTime;
#ifdef DEBUG
bool mCalledPropertyDtor;
#endif
};
}
}
#endif /* !defined(mozilla_css_AnimationCommon_h) */