animationcontroller.cpp

来自「linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自Web」· C++ 代码 · 共 527 行 · 第 1/2 页

}

double AnimationControllerPrivate::beginAnimationUpdateTime()
{
    if (m_beginAnimationUpdateTime == cBeginAnimationUpdateTimeNotSet)
        m_beginAnimationUpdateTime = currentTime();
    return m_beginAnimationUpdateTime;
}

PassRefPtr<RenderStyle> AnimationControllerPrivate::getAnimatedStyleForRenderer(RenderObject* renderer)
{
    if (!renderer)
        return 0;

    RefPtr<CompositeAnimation> rendererAnimations = m_compositeAnimations.get(renderer);
    if (!rendererAnimations)
        return renderer->style();
    
    // Make sure animationUpdateTime is updated, so that it is current even if no
    // styleChange has happened (e.g. accelerated animations).
    setBeginAnimationUpdateTime(cBeginAnimationUpdateTimeNotSet);
    return rendererAnimations->getAnimatedStyle();
}

unsigned AnimationControllerPrivate::numberOfActiveAnimations() const
{
    unsigned count = 0;
    
    RenderObjectAnimationMap::const_iterator animationsEnd = m_compositeAnimations.end();
    for (RenderObjectAnimationMap::const_iterator it = m_compositeAnimations.begin(); it != animationsEnd; ++it) {
        CompositeAnimation* compAnim = it->second.get();
        count += compAnim->numberOfActiveAnimations();
    }
    
    return count;
}

void AnimationControllerPrivate::addToStyleAvailableWaitList(AnimationBase* animation)
{
    ASSERT(!animation->next());
    
    if (m_styleAvailableWaiters)
        m_lastStyleAvailableWaiter->setNext(animation);
    else
        m_styleAvailableWaiters = animation;
        
    m_lastStyleAvailableWaiter = animation;
    animation->setNext(0);
}

void AnimationControllerPrivate::removeFromStyleAvailableWaitList(AnimationBase* animationToRemove)
{
    AnimationBase* prevAnimation = 0;
    for (AnimationBase* animation = m_styleAvailableWaiters; animation; animation = animation->next()) {
        if (animation == animationToRemove) {
            if (prevAnimation)
                prevAnimation->setNext(animation->next());
            else
                m_styleAvailableWaiters = animation->next();
            
            if (m_lastStyleAvailableWaiter == animation)
                m_lastStyleAvailableWaiter = prevAnimation;
                
            animationToRemove->setNext(0);
        }
    }
}

void AnimationControllerPrivate::styleAvailable()
{
    // Go through list of waiters and send them on their way
    for (AnimationBase* animation = m_styleAvailableWaiters; animation; ) {
        AnimationBase* nextAnimation = animation->next();
        animation->setNext(0);
        animation->styleAvailable();
        animation = nextAnimation;
    }
    
    m_styleAvailableWaiters = 0;
    m_lastStyleAvailableWaiter = 0;
}

void AnimationControllerPrivate::addToStartTimeResponseWaitList(AnimationBase* animation, bool willGetResponse)
{
    // If willGetResponse is true, it means this animation is actually waiting for a response
    // (which will come in as a call to notifyAnimationStarted()).
    // In that case we don't need to add it to this list. We just set a waitingForAResponse flag 
    // which says we are waiting for the response. If willGetResponse is false, this animation 
    // is not waiting for a response for itself, but rather for a notifyXXXStarted() call for 
    // another animation to which it will sync.
    //
    // When endAnimationUpdate() is called we check to see if the waitingForAResponse flag is
    // true. If so, we just return and will do our work when the first notifyXXXStarted() call
    // comes in. If it is false, we will not be getting a notifyXXXStarted() call, so we will
    // do our work right away. In both cases we call the onAnimationStartResponse() method
    // on each animation. In the first case we send in the time we got from notifyXXXStarted().
    // In the second case, we just pass in the beginAnimationUpdateTime().
    //
    // This will synchronize all software and accelerated animations started in the same 
    // updateRendering cycle.
    //
    ASSERT(!animation->next());
    
    if (willGetResponse)
        m_waitingForAResponse = true;
    
    if (m_responseWaiters)
        m_lastResponseWaiter->setNext(animation);
    else
        m_responseWaiters = animation;
        
    m_lastResponseWaiter = animation;
    animation->setNext(0);
}

void AnimationControllerPrivate::removeFromStartTimeResponseWaitList(AnimationBase* animationToRemove)
{
    AnimationBase* prevAnimation = 0;
    for (AnimationBase* animation = m_responseWaiters; animation; animation = animation->next()) {
        if (animation == animationToRemove) {
            if (prevAnimation)
                prevAnimation->setNext(animation->next());
            else
                m_responseWaiters = animation->next();
            
            if (m_lastResponseWaiter == animation)
                m_lastResponseWaiter = prevAnimation;
                
            animationToRemove->setNext(0);
        }
    }
}

void AnimationControllerPrivate::startTimeResponse(double t)
{
    // Go through list of waiters and send them on their way
    for (AnimationBase* animation = m_responseWaiters; animation; ) {
        AnimationBase* nextAnimation = animation->next();
        animation->setNext(0);
        animation->onAnimationStartResponse(t);
        animation = nextAnimation;
    }
    
    m_responseWaiters = 0;
    m_responseWaiters = 0;
}

AnimationController::AnimationController(Frame* frame)
    : m_data(new AnimationControllerPrivate(frame))
{
}

AnimationController::~AnimationController()
{
    delete m_data;
}

void AnimationController::cancelAnimations(RenderObject* renderer)
{
    if (!m_data->hasAnimations())
        return;

    if (m_data->clear(renderer)) {
        Node* node = renderer->node();
        ASSERT(!node || (node->document() && !node->document()->inPageCache()));
        node->setChanged(AnimationStyleChange);
    }
}

PassRefPtr<RenderStyle> AnimationController::updateAnimations(RenderObject* renderer, RenderStyle* newStyle)
{
    // Don't do anything if we're in the cache
    if (!renderer->document() || renderer->document()->inPageCache())
        return newStyle;

    RenderStyle* oldStyle = renderer->style();

    if ((!oldStyle || (!oldStyle->animations() && !oldStyle->transitions())) && (!newStyle->animations() && !newStyle->transitions()))
        return newStyle;

    // Fetch our current set of implicit animations from a hashtable.  We then compare them
    // against the animations in the style and make sure we're in sync.  If destination values
    // have changed, we reset the animation.  We then do a blend to get new values and we return
    // a new style.
    ASSERT(renderer->node()); // FIXME: We do not animate generated content yet.

    RefPtr<CompositeAnimation> rendererAnimations = m_data->accessCompositeAnimation(renderer);
    RefPtr<RenderStyle> blendedStyle = rendererAnimations->animate(renderer, oldStyle, newStyle);

    m_data->updateAnimationTimer();

    if (blendedStyle != newStyle) {
        // If the animations/transitions change opacity or transform, we neeed to update
        // the style to impose the stacking rules. Note that this is also
        // done in CSSStyleSelector::adjustRenderStyle().
        if (blendedStyle->hasAutoZIndex() && (blendedStyle->opacity() < 1.0f || blendedStyle->hasTransform()))
            blendedStyle->setZIndex(0);
    }
    return blendedStyle.release();
}

PassRefPtr<RenderStyle> AnimationController::getAnimatedStyleForRenderer(RenderObject* renderer)
{
    return m_data->getAnimatedStyleForRenderer(renderer);
}

void AnimationController::notifyAnimationStarted(RenderObject*, double startTime)
{
    m_data->receivedStartTimeResponse(startTime);
}

bool AnimationController::pauseAnimationAtTime(RenderObject* renderer, const String& name, double t)
{
    return m_data->pauseAnimationAtTime(renderer, name, t);
}

unsigned AnimationController::numberOfActiveAnimations() const
{
    return m_data->numberOfActiveAnimations();
}

bool AnimationController::pauseTransitionAtTime(RenderObject* renderer, const String& property, double t)
{
    return m_data->pauseTransitionAtTime(renderer, property, t);
}

bool AnimationController::isAnimatingPropertyOnRenderer(RenderObject* renderer, CSSPropertyID property, bool isRunningNow) const
{
    return m_data->isAnimatingPropertyOnRenderer(renderer, property, isRunningNow);
}

void AnimationController::suspendAnimations(Document* document)
{
    m_data->suspendAnimations(document);
}

void AnimationController::resumeAnimations(Document* document)
{
    m_data->resumeAnimations(document);
}

void AnimationController::beginAnimationUpdate()
{
    m_data->setBeginAnimationUpdateTime(cBeginAnimationUpdateTimeNotSet);
}

void AnimationController::endAnimationUpdate()
{
    m_data->endAnimationUpdate();
}

bool AnimationController::supportsAcceleratedAnimationOfProperty(CSSPropertyID property)
{
#if USE(ACCELERATED_COMPOSITING)
    return AnimationBase::animationOfPropertyIsAccelerated(property);
#else
    UNUSED_PARAM(property);
    return false;
#endif
}

} // namespace WebCore