FlexibleBoxAlgorithm.h [plain text]
#pragma once
#include "LayoutUnit.h"
#include "RenderStyle.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
class RenderBox;
class FlexItem {
public:
FlexItem(RenderBox&, LayoutUnit flexBaseContentSize, LayoutUnit hypotheticalMainContentSize, LayoutUnit mainAxisBorderAndPadding, LayoutUnit mainAxisMargin);
LayoutUnit hypotheticalMainAxisMarginBoxSize() const
{
return hypotheticalMainContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit flexBaseMarginBoxSize() const
{
return flexBaseContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit flexedMarginBoxSize() const
{
return flexedContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
RenderBox& box;
const LayoutUnit flexBaseContentSize;
const LayoutUnit hypotheticalMainContentSize;
const LayoutUnit mainAxisBorderAndPadding;
const LayoutUnit mainAxisMargin;
LayoutUnit flexedContentSize;
bool frozen;
};
class FlexLayoutAlgorithm {
WTF_MAKE_NONCOPYABLE(FlexLayoutAlgorithm);
public:
FlexLayoutAlgorithm(const RenderStyle&, LayoutUnit lineBreakLength, const Vector<FlexItem>& allItems, LayoutUnit gapBetweenItems, LayoutUnit gapBetweenLines);
bool computeNextFlexLine(size_t& nextIndex, Vector<FlexItem>& lineItems, LayoutUnit& sumFlexBaseSize, double& totalFlexGrow, double& totalFlexShrink, double& totalWeightedFlexShrink, LayoutUnit& sumHypotheticalMainSize);
private:
bool isMultiline() const { return m_style.flexWrap() != FlexWrap::NoWrap; }
const RenderStyle& m_style;
LayoutUnit m_lineBreakLength;
const Vector<FlexItem>& m_allItems;
const LayoutUnit m_gapBetweenItems;
const LayoutUnit m_gapBetweenLines;
};
}