Bug 316658 – When vertically-set text contains a select element, options should be towards the left

• Status: NEW
• Component: Forms

[Fuqiao Xue]

Open　https://w3c.github.io/i18n-tests/exploratory/index.html?text=%3Clabel%3E%E8%A8%80%E8%AA%9E%20%3Cselect%3E%0A%3Coption%20value%3D%22%E6%97%A5%E6%9C%AC%E8%AA%9E%22%3E%E6%97%A5%E6%9C%AC%E8%AA%9E%3C%2Foption%3E%0A%3Coption%20value%3D%22%E4%B8%AD%E6%96%87%22%3E%E4%B8%AD%E6%96%87%3C%2Foption%3E%0A%3Coption%20value%3D%22English%22%3EEnglish%3C%2Foption%3E%0A%3Coption%20value%3D%22fran%C3%A7ais%22%3Efran%C3%A7ais%3C%2Foption%3E%0A%3Coption%20value%3D%22%D9%81%D8%A7%D8%B1%D8%B3%DB%8C%22%3E%D9%81%D8%A7%D8%B1%D8%B3%DB%8C%3C%2Foption%3E%0A%3C%2Fselect%3E%3C%2Flabel%3E&css=.test%20%7B%20writing-mode%3A%20vertical-rl%3B%20%7D&lang=ja&fontSize=36&width=500&height=500&a=When%20vertically-set%20CJK%20text%20contains%20a%20select%20element%2C%20the%20control%20will%20be%20vertical%2C%20and%20multiple%20options%20will%20extend%2C%20vertically-set%2C%20towards%20the%20left.&i=Test%20passes%20if%20the%20initial%20selection%20is%20tall%20and%20thin%2C%20and%20all%20text%20is%20in%20a%20vertical%20orientation%2C%20and%20the%20alternative%20options%20extend%20leftwards%20with%20vertically-set%20text.

Initial control is vertical, but alternative options box is horizontal. Alternative options box should also be vertical.

See also https://github.com/w3c/clreq/issues/247 and https://github.com/w3c/clreq/issues/616

[Radar WebKit Bug Importer]

<rdar://problem/179817831>