InlineLineBreaker.h [plain text]
#pragma once
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include "InlineRunProvider.h"
#include <wtf/IsoMalloc.h>
namespace WebCore {
namespace Layout {
class InlineLineBreaker {
WTF_MAKE_ISO_ALLOCATED(InlineLineBreaker);
public:
InlineLineBreaker(const LayoutState&, const InlineContent&, const Vector<InlineRunProvider::Run>&);
struct Run {
enum class Position { Undetermined, LineBegin, LineEnd };
Position position;
LayoutUnit width;
InlineRunProvider::Run content;
};
Optional<Run> nextRun(LayoutUnit contentLogicalLeft, LayoutUnit availableWidth, bool lineIsEmpty);
private:
enum class LineBreakingBehavior { Keep, Break, WrapToNextLine };
LineBreakingBehavior lineBreakingBehavior(const InlineRunProvider::Run&, bool lineIsEmpty);
bool isAtContentEnd() const;
Run splitRun(const InlineRunProvider::Run&, LayoutUnit contentLogicalLeft, LayoutUnit availableWidth, bool lineIsEmpty);
LayoutUnit runWidth(const InlineRunProvider::Run&, LayoutUnit contentLogicalLeft) const;
LayoutUnit textWidth(const InlineRunProvider::Run&, LayoutUnit contentLogicalLeft) const;
Optional<ItemPosition> adjustSplitPositionWithHyphenation(const InlineRunProvider::Run&, ItemPosition splitPosition, LayoutUnit contentLogicalLeft, LayoutUnit availableWidth, bool isLineEmpty) const;
const LayoutState& m_layoutState;
const InlineContent& m_inlineContent;
const Vector<InlineRunProvider::Run>& m_inlineRuns;
unsigned m_currentRunIndex { 0 };
Optional<ItemPosition> m_splitPosition;
bool m_hyphenationIsDisabled { false };
};
}
}
#endif