- From: Håkon Wium Lie <howcome@opera.com>
- Date: Wed, 9 Jun 2010 00:18:29 +0200
- To: MURAKAMI Shinyu <murakami@antenna.co.jp>
- Cc: Hakon Wium Lie <howcome@opera.com>, "Tab Atkins Jr." <jackalmage@gmail.com>, John Daggett <jdaggett@mozilla.com>, Boris Zbarsky <bzbarsky@mit.edu>, www-style list <www-style@w3.org>
Also sprach MURAKAMI Shinyu:
> > You can use 3) and 4) to write a default style sheet. E.g.:
> >
> > h1:lrt, h1:rtl { font-size: 2em; margin: .67em 0 }
> > h1:ttb { font-size: 2em; margin: 0 .67em }
>
> > dir:lrt horizontal writing is supported and @dir has been set to 'lrt'
> > dir:rtl horizontal writing is supported and @dir has been set to 'rtl'
> > dir:ttb vertial writing is supported and the initial value of
> > 'writing-mode' is 'tb-rl'
>
> See the following example:
>
> table { writing-mode: lr-tb }
> ...
> <h1>...</h1>
> <table>
> ...
> <h1>...</h1>
> ...
> </table>
>
> When the initial value of 'writing-mode' is 'tb-rl', the h1:ttb
> {margin: 0 .67em} is used. It is ok for the first h1,
> but the second h1 inside the table, same h1:ttb {margin: 0 .67em}
> is used although the writing mode is changed.
> The results will be miserable.
You just have to provide the values you prefer when switching
directions. E.g.:
table { writing-mode: lr-tb }
table h1, table h2 { margin: ... }
Anyway, the values provided in the default style sheet would probably
not be correct when switching writing modes. Even in my
horizonatal-only world, I tend to start my style sheets with these
lines of code:
h1, h2, h3, ul, ol, dl, li, blockquote { margin: 0; padding: 0; border: none }
just to cleanse the palate. From there, one can easily specify the
preferred values.
> Another case, when the initial value of 'writing-mode' is 'lr-tb'
> and {writing-mode: tb-rl} is specified in the author style sheet,
> we expect :ttb { ... } of the default style sheet is enabled,
> but the :ttb selector is not affected by the real writing-mode.
Correct. Because we cannot make selectors depend on the value of
properties. We could make things more automatic if we added a "ttb"
value on @dir or some other hint about the preferred direction. But
you seem to think this is not a good idea?
-h&kon
Håkon Wium Lie CTO °þe®ª
howcome@opera.com http://people.opera.com/howcome
Received on Tuesday, 8 June 2010 22:19:19 UTC