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;
RenderStyle* blendedStyle = 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->element()); // FIXME: We do not animate generated content yet.
CompositeAnimation* rendererAnimations = m_data->accessCompositeAnimation(renderer);
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;
}
