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Re: [css2.1] Issue 199 proposal

From: fantasai <fantasai.lists@inkedblade.net>
Date: Tue, 07 Sep 2010 17:43:04 -0700
Message-ID: <4C86DC18.9090306@inkedblade.net>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
CC: www-style list <www-style@w3.org>
On 09/07/2010 05:06 PM, Tab Atkins Jr. wrote:
> This email is meant to address issue 199 on CSS2.1, which I
> volunteered to propose text for.
> http://wiki.csswg.org/spec/css2.1#issue-199
>
>> It would be good to get this clarified, since this affects vertical
>> alignment of both table cells and inline-block elements and currently we
>> seem to not have very good interop here.
>>
>> [1] "Line boxes that contain no text, no preserved white space, no
>>      inline elements with non-zero margins, padding, or borders, and
>>      no other in-flow content (such as images, inline blocks or
>>      inline tables), and do not end with a line feed must be treated
>>      as zero-height line boxes." though this really does beg the
>>      question of whether said line boxes exist at all; they just
>>      have to be treated as 0-height if they do exist?
>>
>> [2]  Testcase:
>>
>>   <div style="display:table">
>>     <div style="display:table-row">
>>       <div style="display:table-cell;background:red">
>>        <div style="width:150px;height:150px;background:blue">  </div>
>>       </div>
>>       <div style="display:table-cell;background:green">a<br/>b</div>
>>     </div>
>>   </div>
>
> Based on the fact that Firefox, Webkit, and IE8 all agree on the
> rendering of this testcase, and supported by Anton's comments in a
> reply to the quoted email, I propose to replace the following
> paragraph in section 9.4.2:
>
> # Line boxes that contain no text, no preserved white space, no
> # inline elements with non-zero margins, padding, or borders, and
> # no other in-flow content (such as images, inline blocks or
> # inline tables), and do not end with a line feed must be treated
> # as zero-height line boxes.
>
> ...with the following text:
>
> | If a line box would be created that would contain no text, no
> | preserved white space, no inline elements with non-zero margins,
> | padding, or borders, and no other in-flow content (such as
> | images, inline blocks or inline tables), and would not end with
> | a line feed, the line box instead must not be created at all.
>
> This expresses what I want, though I'm not sure the language used is
> correct.  I'm not sure how else to refer to the hypothetical entity
> that we're evaluating the existence of.

For the record, the issue that created that paragraph is the following:
   http://lists.w3.org/Archives/Public/www-style/2006Dec/0057.html
Which resulted in this resolution:
   http://lists.w3.org/Archives/Public/www-style/2007Apr/0041.html

~fantasai
Received on Wednesday, 8 September 2010 00:43:39 GMT

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