needsShaping

True when a character of text may draw differently beside its neighbours than alone: a mark, a joiner or another format character, a right-to-left letter, or a letter of a script that joins, reorders or builds clusters, such as Arabic, Devanagari or Thai. False for Latin, Greek, Cyrillic and Armenian letters, punctuation, symbols, CJK ideographs, kana and Hangul syllables.