C++ ImplicitAnimation类代码示例

bool CompositeAnimation::isAnimatingProperty(int property, bool acceleratedOnly, bool isRunningNow) const
{
    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* anim = it->second.get();
            if (anim && anim->isAnimatingProperty(property, acceleratedOnly, isRunningNow))
                return true;
        }
    }

    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* anim = it->second.get();
            if (anim && anim->isAnimatingProperty(property, acceleratedOnly, isRunningNow))
                return true;
        }
    }
    return false;
}

void CompositeAnimationPrivate::cleanupFinishedAnimations(RenderObject* renderer)
{
    if (isSuspended())
        return;

    // Make a list of transitions to be deleted
    Vector<int> finishedTransitions;
    CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();

    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
        ImplicitAnimation* anim = it->second.get();
        if (!anim)
            continue;
        if (anim->postActive())
            finishedTransitions.append(anim->animatingProperty());
    }

    // Delete them
    size_t finishedTransitionCount = finishedTransitions.size();
    for (size_t i = 0; i < finishedTransitionCount; ++i)
        m_transitions.remove(finishedTransitions[i]);

    // Make a list of animations to be deleted
    Vector<AtomicStringImpl*> finishedAnimations;
    AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();

    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
        KeyframeAnimation* anim = it->second.get();
        if (!anim)
            continue;
        if (anim->postActive())
            finishedAnimations.append(anim->name().impl());
    }

    // Delete them
    size_t finishedAnimationCount = finishedAnimations.size();
    for (size_t i = 0; i < finishedAnimationCount; ++i)
        m_keyframeAnimations.remove(finishedAnimations[i]);
}

void CompositeAnimation::clearRenderer()
{
    if (!m_transitions.isEmpty()) {
        // Clear the renderers from all running animations, in case we are in the middle of
        // an animation callback (see https://bugs.webkit.org/show_bug.cgi?id=22052)
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* transition = it->value.get();
            animationController()->animationWillBeRemoved(transition);
            transition->clear();
        }
    }
    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            KeyframeAnimation* anim = it->value.get();
            animationController()->animationWillBeRemoved(anim);
            anim->clear();
        }
    }
}

void CompositeAnimation::suspendAnimations()
{
    if (m_isSuspended)
        return;

    m_isSuspended = true;

    if (!m_keyframeAnimations.isEmpty()) {
        m_keyframeAnimations.checkConsistency();
        AnimationNameMap::const_iterator animationsEnd = m_keyframeAnimations.end();
        for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != animationsEnd; ++it) {
            if (KeyframeAnimation* anim = it->second.get())
                anim->updatePlayState(false);
        }
    }
    if (!m_transitions.isEmpty()) {
        CSSPropertyTransitionsMap::const_iterator transitionsEnd = m_transitions.end();
        for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != transitionsEnd; ++it) {
            ImplicitAnimation* anim = it->second.get();
            if (anim && anim->hasStyle())
                anim->updatePlayState(false);
        }
    }
}

void CompositeAnimation::cleanupFinishedAnimations(RenderObject* renderer)
{
    if (suspended())
        return;
    
    // Make a list of transitions to be deleted
    Vector<int> finishedTransitions;
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();

    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it) {
        ImplicitAnimation* anim = it->second;
        if (!anim)
            continue;
        if (anim->postActive() && !anim->waitingForEndEvent())
            finishedTransitions.append(anim->animatingProperty());
    }
    
    // Delete them
    for (Vector<int>::iterator it = finishedTransitions.begin(); it != finishedTransitions.end(); ++it) {
        ImplicitAnimation* anim = m_transitions.get(*it);
        if (anim) {
            anim->reset(renderer);
            delete anim;
        }
        m_transitions.remove(*it);
    }

    // Make a list of animations to be deleted
    Vector<AtomicStringImpl*> finishedAnimations;
    AnimationNameMap::const_iterator kfend = m_keyframeAnimations.end();

    for (AnimationNameMap::const_iterator it = m_keyframeAnimations.begin(); it != kfend; ++it) {
        KeyframeAnimation* anim = it->second;
        if (!anim)
            continue;
        if (anim->postActive() && !anim->waitingForEndEvent())
            finishedAnimations.append(anim->name().impl());
    }
    
    // delete them
    for (Vector<AtomicStringImpl*>::iterator it = finishedAnimations.begin(); it != finishedAnimations.end(); ++it) {
        KeyframeAnimation* kfanim = m_keyframeAnimations.get(*it);
        if (kfanim) {
            kfanim->reset(renderer);
            delete kfanim;
        }
        m_keyframeAnimations.remove(*it);
    }
}

void CompositeAnimation::updateTransitions(RenderObject* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
{
    // If currentStyle is null or there are no old or new transitions, just skip it
    if (!currentStyle || (!targetStyle->transitions() && m_transitions.isEmpty()))
        return;

    // Mark all existing transitions as no longer active. We will mark the still active ones
    // in the next loop and then toss the ones that didn't get marked.
    CSSPropertyTransitionsMap::const_iterator end = m_transitions.end();
    for (CSSPropertyTransitionsMap::const_iterator it = m_transitions.begin(); it != end; ++it)
        it->second->setActive(false);
        
    RefPtr<RenderStyle> modifiedCurrentStyle;
    
    // Check to see if we need to update the active transitions
    if (targetStyle->transitions()) {
        for (size_t i = 0; i < targetStyle->transitions()->size(); ++i) {
            const Animation* anim = targetStyle->transitions()->animation(i);
            bool isActiveTransition = anim->duration() || anim->delay() > 0;

            int prop = anim->property();

            if (prop == cAnimateNone)
                continue;

            bool all = prop == cAnimateAll;

            // Handle both the 'all' and single property cases. For the single prop case, we make only one pass
            // through the loop.
            for (int propertyIndex = 0; propertyIndex < AnimationBase::getNumProperties(); ++propertyIndex) {
                if (all) {
                    // Get the next property which is not a shorthand.
                    bool isShorthand;
                    prop = AnimationBase::getPropertyAtIndex(propertyIndex, isShorthand);
                    if (isShorthand)
                        continue;
                }

                // ImplicitAnimations are always hashed by actual properties, never cAnimateAll
                ASSERT(prop >= firstCSSProperty && prop < (firstCSSProperty + numCSSProperties));

                // If there is a running animation for this property, the transition is overridden
                // and we have to use the unanimatedStyle from the animation. We do the test
                // against the unanimated style here, but we "override" the transition later.
                RefPtr<KeyframeAnimation> keyframeAnim = getAnimationForProperty(prop);
                RenderStyle* fromStyle = keyframeAnim ? keyframeAnim->unanimatedStyle() : currentStyle;

                // See if there is a current transition for this prop
                ImplicitAnimation* implAnim = m_transitions.get(prop).get();
                bool equal = true;

                if (implAnim) {
                    // If we are post active don't bother setting the active flag. This will cause
                    // this animation to get removed at the end of this function.
                    if (!implAnim->postActive())
                        implAnim->setActive(true);
                    
                    // This might be a transition that is just finishing. That would be the case
                    // if it were postActive. But we still need to check for equality because
                    // it could be just finishing AND changing to a new goal state.
                    //
                    // This implAnim might also not be an already running transition. It might be
                    // newly added to the list in a previous iteration. This would happen if
                    // you have both an explicit transition-property and 'all' in the same
                    // list. In this case, the latter one overrides the earlier one, so we
                    // behave as though this is a running animation being replaced.
                    if (!implAnim->isTargetPropertyEqual(prop, targetStyle)) {
    #if USE(ACCELERATED_COMPOSITING)
                        // For accelerated animations we need to return a new RenderStyle with the _current_ value
                        // of the property, so that restarted transitions use the correct starting point.
                        if (AnimationBase::animationOfPropertyIsAccelerated(prop) && !implAnim->isFallbackAnimating()) {
                            if (!modifiedCurrentStyle)
                                modifiedCurrentStyle = RenderStyle::clone(currentStyle);

                            implAnim->blendPropertyValueInStyle(prop, modifiedCurrentStyle.get());
                        }
    #endif
                        m_transitions.remove(prop);
                        equal = false;
                    }
                } else {
                    // We need to start a transition if it is active and the properties don't match
                    equal = !isActiveTransition || AnimationBase::propertiesEqual(prop, fromStyle, targetStyle);
                }

                // We can be in this loop with an inactive transition (!isActiveTransition). We need
                // to do that to check to see if we are canceling a transition. But we don't want to
                // start one of the inactive transitions. So short circuit that here. (See
                // <https://bugs.webkit.org/show_bug.cgi?id=24787>
                if (!equal && isActiveTransition) {
                    // Add the new transition
                    m_transitions.set(prop, ImplicitAnimation::create(const_cast<Animation*>(anim), prop, renderer, this, modifiedCurrentStyle ? modifiedCurrentStyle.get() : fromStyle));
                }
                
                // We only need one pass for the single prop case
                if (!all)
                    break;
            }
        }
    }
//.........这里部分代码省略.........

void CompositeAnimation::updateTransitions(RenderElement* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
{
    // If currentStyle is null or there are no old or new transitions, just skip it
    if (!currentStyle || (!targetStyle->transitions() && m_transitions.isEmpty()))
        return;

    // Mark all existing transitions as no longer active. We will mark the still active ones
    // in the next loop and then toss the ones that didn't get marked.
    for (auto& transition : m_transitions.values())
        transition->setActive(false);
        
    RefPtr<RenderStyle> modifiedCurrentStyle;
    
    // Check to see if we need to update the active transitions
    if (targetStyle->transitions()) {
        for (size_t i = 0; i < targetStyle->transitions()->size(); ++i) {
            Animation& animation = targetStyle->transitions()->animation(i);
            bool isActiveTransition = !m_suspended && (animation.duration() || animation.delay() > 0);

            Animation::AnimationMode mode = animation.animationMode();
            if (mode == Animation::AnimateNone)
                continue;

            CSSPropertyID prop = animation.property();

            bool all = mode == Animation::AnimateAll;

            // Handle both the 'all' and single property cases. For the single prop case, we make only one pass
            // through the loop.
            for (int propertyIndex = 0; propertyIndex < CSSPropertyAnimation::getNumProperties(); ++propertyIndex) {
                if (all) {
                    // Get the next property which is not a shorthand.
                    bool isShorthand;
                    prop = CSSPropertyAnimation::getPropertyAtIndex(propertyIndex, isShorthand);
                    if (isShorthand)
                        continue;
                }

                // ImplicitAnimations are always hashed by actual properties, never animateAll.
                ASSERT(prop >= firstCSSProperty && prop < (firstCSSProperty + numCSSProperties));

                // If there is a running animation for this property, the transition is overridden
                // and we have to use the unanimatedStyle from the animation. We do the test
                // against the unanimated style here, but we "override" the transition later.
                RefPtr<KeyframeAnimation> keyframeAnim = getAnimationForProperty(prop);
                RenderStyle* fromStyle = keyframeAnim ? keyframeAnim->unanimatedStyle() : currentStyle;

                // See if there is a current transition for this prop
                ImplicitAnimation* implAnim = m_transitions.get(prop);
                bool equal = true;

                if (implAnim) {
                    // If we are post active don't bother setting the active flag. This will cause
                    // this animation to get removed at the end of this function.
                    if (!implAnim->postActive())
                        implAnim->setActive(true);
                    
                    // This might be a transition that is just finishing. That would be the case
                    // if it were postActive. But we still need to check for equality because
                    // it could be just finishing AND changing to a new goal state.
                    //
                    // This implAnim might also not be an already running transition. It might be
                    // newly added to the list in a previous iteration. This would happen if
                    // you have both an explicit transition-property and 'all' in the same
                    // list. In this case, the latter one overrides the earlier one, so we
                    // behave as though this is a running animation being replaced.
                    if (!implAnim->isTargetPropertyEqual(prop, targetStyle)) {
                        // For accelerated animations we need to return a new RenderStyle with the _current_ value
                        // of the property, so that restarted transitions use the correct starting point.
                        if (CSSPropertyAnimation::animationOfPropertyIsAccelerated(prop) && implAnim->isAccelerated()) {
                            if (!modifiedCurrentStyle)
                                modifiedCurrentStyle = RenderStyle::clone(currentStyle);

                            implAnim->blendPropertyValueInStyle(prop, modifiedCurrentStyle.get());
                        }
                        LOG(Animations, "Removing existing ImplicitAnimation %p for property %s", implAnim, getPropertyName(prop));
                        animationController().animationWillBeRemoved(implAnim);
                        m_transitions.remove(prop);
                        equal = false;
                    }
                } else {
                    // We need to start a transition if it is active and the properties don't match
                    equal = !isActiveTransition || CSSPropertyAnimation::propertiesEqual(prop, fromStyle, targetStyle);
                }

                // We can be in this loop with an inactive transition (!isActiveTransition). We need
                // to do that to check to see if we are canceling a transition. But we don't want to
                // start one of the inactive transitions. So short circuit that here. (See
                // <https://bugs.webkit.org/show_bug.cgi?id=24787>
                if (!equal && isActiveTransition) {
                    // Add the new transition
                    RefPtr<ImplicitAnimation> implicitAnimation = ImplicitAnimation::create(animation, prop, renderer, this, modifiedCurrentStyle ? modifiedCurrentStyle.get() : fromStyle);
                    LOG(Animations, "Created ImplicitAnimation %p for property %s duration %.2f delay %.2f", implicitAnimation.get(), getPropertyName(prop), animation.duration(), animation.delay());
                    m_transitions.set(prop, implicitAnimation.release());
                }
                
                // We only need one pass for the single prop case
                if (!all)
                    break;
            }
//.........这里部分代码省略.........

void CompositeAnimation::updateTransitions(RenderObject* renderer, const RenderStyle* currentStyle, RenderStyle* targetStyle)
{
    // If currentStyle is null, we don't do transitions
    if (!currentStyle || !targetStyle->transitions())
        return;
        
    // Check to see if we need to update the active transitions
    for (size_t i = 0; i < targetStyle->transitions()->size(); ++i) {
        const Animation* anim = (*targetStyle->transitions())[i].get();
        double duration = anim->duration();
        double delay = anim->delay();

        // If this is an empty transition, skip it
        if (duration == 0 && delay <= 0)
            continue;
         
        int prop = anim->property();
        bool all = prop == cAnimateAll;
        
        // Handle both the 'all' and single property cases. For the single prop case, we make only one pass
        // through the loop
        for (int propertyIndex = 0; ; ++propertyIndex) {
            if (all) {
                if (propertyIndex >= AnimationBase::getNumProperties())
                    break;
                // get the next prop
                prop = AnimationBase::getPropertyAtIndex(propertyIndex);
            }

            // ImplicitAnimations are always hashed by actual properties, never cAnimateAll
            ASSERT(prop > firstCSSProperty && prop < (firstCSSProperty + numCSSProperties));

            // See if there is a current transition for this prop
            ImplicitAnimation* implAnim = m_transitions.get(prop);
            bool equal = true;
            
            if (implAnim) {
                // There is one, has our target changed?
                if (!implAnim->isTargetPropertyEqual(prop, targetStyle)) {
                    implAnim->reset(renderer);
                    delete implAnim;
                    m_transitions.remove(prop);
                    equal = false;
                }
            } else {
                // See if we need to start a new transition
                equal = AnimationBase::propertiesEqual(prop, currentStyle, targetStyle);
            }
            
            if (!equal) {
                // Add the new transition
                ImplicitAnimation* animation = new ImplicitAnimation(const_cast<Animation*>(anim), prop, renderer, this);
                m_transitions.set(prop, animation);
            }
            
            // We only need one pass for the single prop case
            if (!all)
                break;
        }
    }
}

void CompositeAnimationPrivate::updateTransitions(RenderObject* renderer, RenderStyle* currentStyle, RenderStyle* targetStyle)
{
    // If currentStyle is null, we don't do transitions
    if (!currentStyle || !targetStyle->transitions())
        return;

    // Check to see if we need to update the active transitions
    for (size_t i = 0; i < targetStyle->transitions()->size(); ++i) {
        const Animation* anim = targetStyle->transitions()->animation(i);
        bool isActiveTransition = anim->duration() || anim->delay() > 0;

        int prop = anim->property();

        if (prop == cAnimateNone)
            continue;

        bool all = prop == cAnimateAll;

        // Handle both the 'all' and single property cases. For the single prop case, we make only one pass
        // through the loop.
        for (int propertyIndex = 0; propertyIndex < AnimationBase::getNumProperties(); ++propertyIndex) {
            if (all) {
                // Get the next property
                prop = AnimationBase::getPropertyAtIndex(propertyIndex);
            }

            // ImplicitAnimations are always hashed by actual properties, never cAnimateAll
            ASSERT(prop > firstCSSProperty && prop < (firstCSSProperty + numCSSProperties));

            // If there is a running animation for this property, the transition is overridden
            // and we have to use the unanimatedStyle from the animation. We do the test
            // against the unanimated style here, but we "override" the transition later.
            RefPtr<KeyframeAnimation> keyframeAnim = getAnimationForProperty(prop);
            RenderStyle* fromStyle = keyframeAnim ? keyframeAnim->unanimatedStyle() : currentStyle;

            // See if there is a current transition for this prop
            ImplicitAnimation* implAnim = m_transitions.get(prop).get();
            bool equal = true;

            if (implAnim) {
               // This implAnim might not be an already running transition. It might be
               // newly added to the list in a previous iteration. This would happen if
               // you have both an explicit transition-property and 'all' in the same
               // list. In this case, the latter one overrides the earlier one, so we
               // behave as though this is a running animation being replaced.
                if (!isActiveTransition)
                    m_transitions.remove(prop);
                else if (!implAnim->isTargetPropertyEqual(prop, targetStyle)) {
                    m_transitions.remove(prop);
                    equal = false;
                }
            } else {
                // We need to start a transition if it is active and the properties don't match
                equal = !isActiveTransition || AnimationBase::propertiesEqual(prop, fromStyle, targetStyle);
            }

            if (!equal) {
                // Add the new transition
                m_transitions.set(prop, ImplicitAnimation::create(const_cast<Animation*>(anim), prop, renderer, m_compositeAnimation, fromStyle));
            }
            
            // We only need one pass for the single prop case
            if (!all)
                break;
        }
    }
}