#include "config.h"
#include "FloatingState.h"
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include "FormattingContext.h"
#include "LayoutBox.h"
#include "LayoutContainerBox.h"
#include "LayoutState.h"
#include "RuntimeEnabledFeatures.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
namespace Layout {
WTF_MAKE_ISO_ALLOCATED_IMPL(FloatingState);
FloatingState::FloatItem::FloatItem(const Box& layoutBox, BoxGeometry absoluteBoxGeometry)
: m_layoutBox(makeWeakPtr(layoutBox))
, m_position(layoutBox.isLeftFloatingPositioned() ? Position::Left : Position::Right)
, m_absoluteBoxGeometry(absoluteBoxGeometry)
{
}
FloatingState::FloatItem::FloatItem(Position position, BoxGeometry absoluteBoxGeometry)
: m_position(position)
, m_absoluteBoxGeometry(absoluteBoxGeometry)
{
}
FloatingState::FloatingState(LayoutState& layoutState, const ContainerBox& formattingContextRoot)
: m_layoutState(layoutState)
, m_formattingContextRoot(makeWeakPtr(formattingContextRoot))
{
}
void FloatingState::append(FloatItem floatItem)
{
if (m_floats.isEmpty())
return m_floats.append(floatItem);
ASSERT_IMPLIES(floatItem.floatBox(), m_floats.findMatching([&] (auto& entry) {
return entry.floatBox() == floatItem.floatBox();
}) == notFound);
auto isLeftPositioned = floatItem.isLeftPositioned();
auto horizontalMargin = floatItem.horizontalMargin();
auto hasNegativeHorizontalMargin = (isLeftPositioned && horizontalMargin.start < 0) || (!isLeftPositioned && horizontalMargin.end < 0);
if (!hasNegativeHorizontalMargin)
return m_floats.append(floatItem);
for (int i = m_floats.size() - 1; i >= 0; --i) {
auto& floatItem = m_floats[i];
if (isLeftPositioned != floatItem.isLeftPositioned())
continue;
if (floatItem.rectWithMargin().top() < floatItem.rectWithMargin().bottom())
continue;
if ((isLeftPositioned && floatItem.rectWithMargin().right() >= floatItem.rectWithMargin().right())
|| (!isLeftPositioned && floatItem.rectWithMargin().left() <= floatItem.rectWithMargin().left()))
return m_floats.insert(i + 1, floatItem);
}
return m_floats.insert(0, floatItem);
}
}
}
#endif