/* * Copyright (C) 2020 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. AND ITS CONTRIBUTORS ``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 ITS 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 "DisplayStackingItem.h" #if ENABLE(LAYOUT_FORMATTING_CONTEXT) #include "DisplayBoxModelBox.h" #include <wtf/IsoMallocInlines.h> #include <wtf/text/TextStream.h> namespace WebCore { namespace Display { StackingItem::StackingItem(std::unique_ptr<BoxModelBox>&& box) : m_box(WTFMove(box)) { ASSERT(m_box); } bool StackingItem::isStackingContext() const { return m_box->style().isStackingContext(); } void StackingItem::addChildStackingItem(std::unique_ptr<StackingItem>&& item) { auto zIndex = item->box().style().zIndex().valueOr(0); if (zIndex < 0) m_negativeZOrderList.append(WTFMove(item)); else m_positiveZOrderList.append(WTFMove(item)); } void StackingItem::sortLists() { auto compareZIndex = [](const std::unique_ptr<StackingItem>& a, const std::unique_ptr<StackingItem>& b) { return a->box().style().zIndex().valueOr(0) < b->box().style().zIndex().valueOr(0); }; std::stable_sort(m_positiveZOrderList.begin(), m_positiveZOrderList.end(), compareZIndex); std::stable_sort(m_negativeZOrderList.begin(), m_negativeZOrderList.end(), compareZIndex); } } // namespace Display } // namespace WebCore #endif // ENABLE(LAYOUT_FORMATTING_CONTEXT)