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; }