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#ifndef WritingMode_h
#define WritingMode_h

namespace blink {

enum WritingMode {
    TopToBottomWritingMode, RightToLeftWritingMode, LeftToRightWritingMode, BottomToTopWritingMode
};

// Lines have horizontal orientation; modes horizontal-tb or horizontal-bt.
inline bool isHorizontalWritingMode(WritingMode writingMode)
{
    return writingMode == TopToBottomWritingMode || writingMode == BottomToTopWritingMode;
}

// Bottom of the line occurs earlier in the block; modes vertical-lr or horizontal-bt.
inline bool isFlippedLinesWritingMode(WritingMode writingMode)
{
    return writingMode == LeftToRightWritingMode || writingMode == BottomToTopWritingMode;
}

// Block progression increases in the opposite direction to normal; modes vertical-rl or horizontal-bt.
inline bool isFlippedBlocksWritingMode(WritingMode writingMode)
{
    return writingMode == RightToLeftWritingMode || writingMode == BottomToTopWritingMode;
}

} // namespace blink

#endif // WritingMode_h