blob: 2177f20109d93490b8e142576f61fc26b3b6f624 [file] [log] [blame]
/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "WebAnimationUtilities.h"
#include "Animation.h"
#include "AnimationList.h"
#include "CSSAnimation.h"
#include "CSSTransition.h"
#include "DeclarativeAnimation.h"
#include "WebAnimation.h"
namespace WebCore {
bool compareAnimationsByCompositeOrder(WebAnimation& lhsAnimation, WebAnimation& rhsAnimation, const AnimationList* cssAnimationList)
{
bool lhsHasOwningElement = is<DeclarativeAnimation>(lhsAnimation) && downcast<DeclarativeAnimation>(lhsAnimation).owningElement();
bool rhsHasOwningElement = is<DeclarativeAnimation>(rhsAnimation) && downcast<DeclarativeAnimation>(rhsAnimation).owningElement();
// CSS Transitions sort first.
bool lhsIsCSSTransition = lhsHasOwningElement && is<CSSTransition>(lhsAnimation);
bool rhsIsCSSTransition = rhsHasOwningElement && is<CSSTransition>(rhsAnimation);
if (lhsIsCSSTransition || rhsIsCSSTransition) {
if (lhsIsCSSTransition == rhsIsCSSTransition) {
// Sort transitions first by their generation time, and then by transition-property.
// https://drafts.csswg.org/css-transitions-2/#animation-composite-order
auto& lhsCSSTransition = downcast<CSSTransition>(lhsAnimation);
auto& rhsCSSTransition = downcast<CSSTransition>(rhsAnimation);
if (lhsCSSTransition.generationTime() != rhsCSSTransition.generationTime())
return lhsCSSTransition.generationTime() < rhsCSSTransition.generationTime();
return lhsCSSTransition.transitionProperty().utf8() < rhsCSSTransition.transitionProperty().utf8();
}
return !rhsIsCSSTransition;
}
// CSS Animations sort next.
bool lhsIsCSSAnimation = lhsHasOwningElement && is<CSSAnimation>(lhsAnimation);
bool rhsIsCSSAnimation = rhsHasOwningElement && is<CSSAnimation>(rhsAnimation);
if (lhsIsCSSAnimation || rhsIsCSSAnimation) {
if (lhsIsCSSAnimation == rhsIsCSSAnimation) {
// We must have a list of CSS Animations if we have CSS Animations to sort through.
ASSERT(cssAnimationList);
ASSERT(!cssAnimationList->isEmpty());
// https://drafts.csswg.org/css-animations-2/#animation-composite-order
// Sort A and B based on their position in the computed value of the animation-name property of the (common) owning element.
auto& lhsBackingAnimation = downcast<CSSAnimation>(lhsAnimation).backingAnimation();
auto& rhsBackingAnimation = downcast<CSSAnimation>(rhsAnimation).backingAnimation();
for (size_t i = 0; i < cssAnimationList->size(); ++i) {
auto& animation = cssAnimationList->animation(i);
if (animation == lhsBackingAnimation)
return true;
if (animation == rhsBackingAnimation)
return false;
}
// We should have found either of those CSS animations in the CSS animations list.
ASSERT_NOT_REACHED();
}
return !rhsIsCSSAnimation;
}
// JS-originated animations sort last based on their position in the global animation list.
// https://drafts.csswg.org/web-animations-1/#animation-composite-order
return lhsAnimation.globalPosition() < rhsAnimation.globalPosition();
}
} // namespace WebCore