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00d13c3e8f
This patch just moves a piece of functionality from AnimationCollection::EnsureStyleRuleFor to the EffectCompositor. In subsequent bugs we will move more and more of this functionality across until this logic is fully contained in the EffectCompositor.
118 lines
4.4 KiB
C++
118 lines
4.4 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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#ifndef mozilla_EffectCompositor_h
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#define mozilla_EffectCompositor_h
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#include "mozilla/Maybe.h"
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#include "mozilla/Pair.h"
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#include "mozilla/RefPtr.h"
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#include "nsCSSProperty.h"
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#include "nsCSSPseudoElements.h"
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#include "nsTArray.h"
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class nsCSSPropertySet;
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class nsIFrame;
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class nsPresContext;
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class nsStyleContext;
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namespace mozilla {
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class EffectSet;
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namespace dom {
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class Animation;
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class Element;
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}
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class EffectCompositor
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{
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public:
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// Animations can be applied at two different levels in the CSS cascade:
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enum class CascadeLevel {
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// The animations sheet (CSS animations, script-generated animations,
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// and CSS transitions that are no longer tied to CSS markup)
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Animations,
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// The transitions sheet (CSS transitions that are tied to CSS markup)
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Transitions
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};
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// We don't define this as part of CascadeLevel as then we'd have to add
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// explicit checks for the Count enum value everywhere CascadeLevel is used.
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static const size_t kCascadeLevelCount =
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static_cast<size_t>(CascadeLevel::Transitions) + 1;
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static bool HasAnimationsForCompositor(const nsIFrame* aFrame,
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nsCSSProperty aProperty);
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static nsTArray<RefPtr<dom::Animation>>
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GetAnimationsForCompositor(const nsIFrame* aFrame,
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nsCSSProperty aProperty);
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// Update animation cascade results for the specified (pseudo-)element
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// but only if we have marked the cascade as needing an update due a
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// the change in the set of effects or a change in one of the effects'
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// "in effect" state.
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//
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// This method does NOT detect if other styles that apply above the
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// animation level of the cascade have changed.
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static void
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MaybeUpdateCascadeResults(dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType,
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nsStyleContext* aStyleContext);
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// Update the mWinsInCascade member for each property in effects targetting
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// the specified (pseudo-)element.
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//
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// This can be expensive so we should only call it if styles that apply
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// above the animation level of the cascade might have changed. For all
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// other cases we should call MaybeUpdateCascadeResults.
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static void
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UpdateCascadeResults(dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType,
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nsStyleContext* aStyleContext);
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// Helper to fetch the corresponding element and pseudo-type from a frame.
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//
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// For frames corresponding to pseudo-elements, the returned element is the
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// element on which we store the animations (i.e. the EffectSet and/or
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// AnimationCollection), *not* the generated content.
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//
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// Returns an empty result when a suitable element cannot be found including
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// when the frame represents a pseudo-element on which we do not support
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// animations.
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static Maybe<Pair<dom::Element*, nsCSSPseudoElements::Type>>
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GetAnimationElementAndPseudoForFrame(const nsIFrame* aFrame);
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// Rebuilds the animation rule corresponding to |aCascadeLevel| on the
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// EffectSet associated with the specified (pseudo-)element.
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static void ComposeAnimationRule(dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType,
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CascadeLevel aCascadeLevel,
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bool& aStyleChanging);
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private:
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// Get the properties in |aEffectSet| that we are able to animate on the
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// compositor but which are also specified at a higher level in the cascade
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// than the animations level in |aStyleContext|.
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static void
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GetOverriddenProperties(nsStyleContext* aStyleContext,
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EffectSet& aEffectSet,
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nsCSSPropertySet& aPropertiesOverridden);
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static void
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UpdateCascadeResults(EffectSet& aEffectSet,
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dom::Element* aElement,
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nsCSSPseudoElements::Type aPseudoType,
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nsStyleContext* aStyleContext);
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static nsPresContext* GetPresContext(dom::Element* aElement);
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};
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} // namespace mozilla
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#endif // mozilla_EffectCompositor_h
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