- From: Koji Ishii <kojiishi@gluesoft.co.jp>
- Date: Tue, 22 Mar 2011 08:28:41 -0400
- To: "www-style@w3.org" <www-style@w3.org>
- CC: "CJK discussion (public-i18n-cjk@w3.org)" <public-i18n-cjk@w3.org>
Fantasai and I were discussing on the definition of "character's intrinsic orientation". It's described at the text-orientation property[1], after "Example V". After several investigation, we figured that neither script orientation[2] alone nor Unicode East Asian Width[3] alone is good enough to determine the intrinsic orientation, so we need to modify the logic to use both of them. Current our idea is to revise the logic to the one as below. IF ScriptOrientation=Translate || (EAW=F|W) Always upright ELIF ScriptOrientation=Rotate # All chars are EAW=N Always sideways ELIF ScriptOrientation=Horizontal # EAW=F|W are already excluded by first IF Sideways for ''vertical-right'', upright for ''upright'' ELIF # Script=Common|Inherited|Unknown IF EAW=H|N|Na Sideways ELSE # EAW=A ... The "..." part indicates when both script and EAW are ambiguous. Our hope is to rely on font information in that case, and we'll be investigating the appropriate sentences to put in there. Current our idea is to put sentences like this: | If the font has information (like vertical alternates or vertical position) | that indicates intrinsic orientation is upright, it should be honored. We'll investigate if this is appropriate and get this reviewed by a few people around, but any opinions and/or feedback are greatly appreciated. [1] http://dev.w3.org/csswg/css3-writing-modes/#text-orientation [2] http://dev.w3.org/csswg/css3-writing-modes/#script-orientations [3] http://unicode.org/reports/tr11/ Regards, Koji
Received on Tuesday, 22 March 2011 12:29:57 UTC