- From: Simon Pieters <simonp@opera.com>
- Date: Wed, 04 Feb 2009 20:36:11 +0100
- To: "L. David Baron" <dbaron@dbaron.org>
- Cc: public-html <public-html@w3.org>
On Wed, 04 Feb 2009 19:02:43 +0100, L. David Baron <dbaron@dbaron.org> wrote: > On Wednesday 2009-02-04 14:00 +0100, Simon Pieters wrote: >> >> Consider >> >> http://software.hixie.ch/utilities/js/live-dom-viewer/?%3C!doctype%20html%3E%0D%0A%3Cdiv%20align%3Dright%3E%0D%0A%20%3Ctable%20border%20style%3Dmargin-right%3Aauto%3E%3Ctd%3Ex >> >> Should the table be left-aligned or centered? >> >> AFAICT the spec says it should be centered. > > Which spec? If HTML5 says something here I think it should say > left-aligned. The margin-right:auto on the table should override > the align=right on its parent. (Do you see the same results if you > specify align=center on a grandparent, etc.?) HTML5 says: The div, caption, thead, tbody, tfoot, tr, td, and th elements, when they have an align attribute whose value is an ASCII case-insensitive match for the string "right", are expected to right-align text within themselves, as if they had their 'text-align' property set to 'right' in a presentational hint, and to right-align blocks and tables within them, as if their descendants had their 'margin-left' property set to 'auto' in presentational hints. So <div align=right> <table><tr><td>x</table> </div> is effectively the same as <div style="text-align:right"> <table style="margin-left:auto"><tr><td>x</table> </div> Now add 'margin-right:auto' to the table and it becomes centered. > (I could see an argument for left aligned, but I don't think > centering is a reasonable compromise between one thing saying left > and the other saying right... what would you then do as a compromise > between center and left, etc.?) > > align=right and align=left on DIV and similar can't be expressed > using existing CSS, although they could be expressed using the > property described here (which could be called 'block-align' if it > were added): > http://lists.w3.org/Archives/Public/www-style/2007Nov/0071.html > > Gecko implements this proposal as extra values on 'text-align', > though. If we want HTML5 to match IE, WebKit and Gecko then I guess it needs to rephrase along the lines of the proposal for 'block-align' referenced above. -- Simon Pieters Opera Software
Received on Wednesday, 4 February 2009 19:37:04 UTC