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Re: [CSS21] no definition of when inlines split due to bidi reordering

From: fantasai <fantasai.lists@inkedblade.net>
Date: Mon, 02 May 2011 19:25:37 -0700
Message-ID: <4DBF67A1.4010607@inkedblade.net>
To: "L. David Baron" <dbaron@dbaron.org>
CC: www-style@w3.org
On 01/25/2011 12:25 PM, L. David Baron wrote:
> In section 10.1, the definition of containing block says:
>    # 4. If the element has 'position: absolute', the containing block
>    #    is established by the nearest ancestor with a 'position' of
>    #    'absolute', 'relative' or 'fixed', in the following way:
>    #
>    #    1. In the case that the ancestor is an inline box, the
>    #       containing block depends on the 'direction' property of
>    #       the ancestor:
>    #
>    #       1. If the 'direction' is 'ltr', the top and left of the
>    #          containing block are the top and left padding edges of
>    #          the first box generated by the ancestor, and the bottom
>    #          and right are the bottom and right padding edges of the
>    #          last box of the ancestor.
>    #
>    #       2. If the 'direction' is 'rtl', the top and right are the
>    #          top and right padding edges of the first box generated
>    #          by the ancestor, and the bottom and left are the bottom
>    #          and left padding edges of the last box of the ancestor.
>    --http://www.w3.org/TR/CSS21/visudet.html#containing-block-details
>
> And in section 9.4.2, it says:
>    # Inline boxes may also be split into several boxes within the
>    # same line box due to bidirectional text processing.
>    --http://www.w3.org/TR/CSS21/visuren.html#inline-formatting
>
> First, this should probably say "might" rather than "may".
>
> Second, nothing that I can see defines when and how this splitting
> occurs.  (Section 8.6 refers to this splitting but does not define
> it.)
>
> The fact that when this splitting occurs is not defined means that
> what the "first" and "last" boxes referred to in 10.1 are not
> precisely defined when bidi is involved.

These should be replaced with 'leftmost' and 'rightmost', and this
should be fixed in the CSS2.1 errata.

~fantasai
Received on Tuesday, 3 May 2011 02:26:09 GMT

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