73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
|
|
* 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().value_or(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().value_or(0) < b->box().style().zIndex().value_or(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)
|