/* * Copyright (C) 2019 Igalia S.L. 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 "ScrollBehavior.h" #include "Element.h" #include "RenderElement.h" #include "RenderStyle.h" #include "Settings.h" namespace WebCore { bool useSmoothScrolling(ScrollBehavior behavior, Element* associatedElement) { if (!associatedElement || !associatedElement->renderer() || !associatedElement->document().settings().CSSOMViewSmoothScrollingEnabled()) return false; // https://drafts.csswg.org/cssom-view/#scrolling switch (behavior) { case ScrollBehavior::Auto: return associatedElement->renderer()->style().useSmoothScrolling(); case ScrollBehavior::Instant: return false; case ScrollBehavior::Smooth: return true; } ASSERT_NOT_REACHED(); return false; } } // namespace WebCore