Created attachment 128505 [details]
Sample that mix English,CJK text, and several kinds of brackets.
Created attachment 128506 [details]
Screenshot 184.108.40.206 v.s 220.127.116.11alpha1
I think we really need to do an extra pass of itemization for vertical direction, relying on the resolved script is not enough.
But the hardest part is coming up with the criteria for itemization, and I really need some help here.
In ScriptRun::next(), it follows the 5.1 of UAX#24 that parentheses have the same script as its enclosing characters. I'm guessing maybe it is good enough to ignore this rule for vertical layout.
UTR #50 has some informations for this
Khaled Hosny committed a patch related to this issue.
It has been pushed to "master":
tdf#103718: Correctly set vertical direction
It will be available in 5.3.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.
It is correct now. Thanks.