Source/WebCore/layout/integration/InlineIteratorInlineBox.cpp

/*
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#include "config.h"
#include "InlineIteratorInlineBox.h"

#include "LayoutIntegrationLineLayout.h"

namespace WebCore {
namespace InlineIterator {

InlineBox::InlineBox(PathVariant&& path)
    : Box(WTFMove(path))
{
}

std::pair<bool, bool> InlineBox::hasClosedLeftAndRightEdge() const
{
    // FIXME: Layout knows the answer to this question so we should consult it.
#if ENABLE(CSS_BOX_DECORATION_BREAK)
    if (style().boxDecorationBreak() == BoxDecorationBreak::Clone)
        return { true, true };
#endif
    bool isLTR = style().isLeftToRightDirection();
    bool isFirst = !previousInlineBox() && !renderer().isContinuation();
    bool isLast = !nextInlineBox() && !renderer().continuation();
    return { isLTR ? isFirst : isLast, isLTR ? isLast : isFirst };
};

InlineBoxIterator InlineBox::nextInlineBox() const
{
    return InlineBoxIterator(*this).traverseNextInlineBox();
}

InlineBoxIterator InlineBox::previousInlineBox() const
{
    return InlineBoxIterator(*this).traversePreviousInlineBox();
}

LeafBoxIterator InlineBox::firstLeafBox() const
{
    return WTF::switchOn(m_pathVariant, [](auto& path) -> LeafBoxIterator {
        return { path.firstLeafBoxForInlineBox() };
    });
}

LeafBoxIterator InlineBox::lastLeafBox() const
{
    return WTF::switchOn(m_pathVariant, [](auto& path) -> LeafBoxIterator {
        return { path.lastLeafBoxForInlineBox() };
    });
}

LeafBoxIterator InlineBox::endLeafBox() const
{
    if (auto last = lastLeafBox())
        return last->nextOnLine();
    return { };
}

InlineBoxIterator::InlineBoxIterator(Box::PathVariant&& pathVariant)
    : BoxIterator(WTFMove(pathVariant))
{
}

InlineBoxIterator::InlineBoxIterator(const Box& box)
    : BoxIterator(box)
{
}

InlineBoxIterator& InlineBoxIterator::traverseNextInlineBox()
{
    WTF::switchOn(m_box.m_pathVariant, [](auto& path) {
        path.traverseNextInlineBox();
    });
    return *this;
}

InlineBoxIterator& InlineBoxIterator::traversePreviousInlineBox()
{
    WTF::switchOn(m_box.m_pathVariant, [](auto& path) {
        path.traversePreviousInlineBox();
    });
    return *this;
}

InlineBoxIterator inlineBoxFor(const LegacyInlineFlowBox& legacyInlineFlowBox)
{
    return { BoxLegacyPath { &legacyInlineFlowBox } };
}

#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
InlineBoxIterator inlineBoxFor(const LayoutIntegration::InlineContent& content, const InlineDisplay::Box& box)
{
    return inlineBoxFor(content, content.indexForBox(box));
}

InlineBoxIterator inlineBoxFor(const LayoutIntegration::InlineContent& content, size_t boxIndex)
{
    ASSERT(content.boxes[boxIndex].isInlineBox());
    return { BoxModernPath { content, boxIndex } };
}
#endif

}
}