[nolight132]

Summary

• draw right-to-left DirectWrite runs from the origin DirectWrite reports, so Arabic and Hebrew read in order on Windows
• lay out DirectWrite lines whose first strong letter is right to left from the right, so Latin words inside them land on the correct side
• wrap, measure and place the caret in right-to-left text in reading order on every platform, whether the shaper hands glyphs over in visual or reading order
• paint underlines, strikethroughs and backgrounds across the right-to-left glyphs they cover
• treat Hebrew and Arabic letters as word characters so wrapping breaks between words
• keep left-to-right text on the existing code paths