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RE: [RC3] absolute-non-replaced-height-003 and absolute-non-replaced-max-height-003 : vertical centering

From: Arron Eicholz <Arron.Eicholz@microsoft.com>
Date: Wed, 8 Dec 2010 16:20:43 +0000
To: "css21testsuite@gtalbot.org" <css21testsuite@gtalbot.org>
CC: "public-css-testsuite@w3.org" <public-css-testsuite@w3.org>
Message-ID: <07349ECFC3608F48BC3B10459913E70B103205E7@TK5EX14MBXC140.redmond.corp.microsoft.com>
On Friday, December 03, 2010 10:50 PM Gérard Talbot
> Le Ven 3 décembre 2010 9:58, Arron Eicholz a écrit :
> > On Tuesday, November 23, 2010 8:06 PM Gérard Talbot wrote:
> >> Le Mar 23 novembre 2010 18:10, "Gérard Talbot" a écrit :
> >> > Hello,
> >> >
> >> > http://test.csswg.org/suites/css2.1/20101027/html4/absolute-non-rep
> >> > lac
> >> > ed-height-003.htm
> >> >
> >> > http://test.csswg.org/suites/css2.1/20101027/xhtml1/absolute-non-re
> >> > pla
> >> > ced-height-003.xht
> >> >
> >> > http://test.csswg.org/source/contributors/microsoft/submitted/Chapt
> >> > er_ 10/absolute-non-replaced-height-003.xht
> >> >
> >> > Those testcases are ok as far as pass/fail conditions and coding
> >> > are involved... but not the assert text.
> >> >
> >> > The title and assert refer to vertical centering.
> >> >
> >> > 1-
> >> > <meta name="assert" content="An element is vertically centered when
> >> > both 'margin-top' and 'margin-bottom' have equal values, when
> >> > 'top',
> >> 'bottom'
> >> > and 'height' are all are not auto and 'margin-top' and
> >> 'margin-bottom'
> >> > are both 'auto'.">
> >> >
> >> > But that is not correct, not true.
> >> >
> >> > An abs. pos. non-replaced element's padding box (which is the area
> >> > painted by background-color of the element) will be vertically
> >> > centered within its containing block only if both 'margin-top' and
> >> > 'margin-bottom' have equal values and if 'top' and 'bottom' have
> >> equal
> >> > values.
> >>
> >> I should have said:
> >>
> >> [
> >> An abs. pos. non-replaced element's border box (which is the area
> >> painted by background-color of the element and the borders) will be
> >> vertically centered within its containing block only if both
> >> 'margin-top' and
> >> 'margin-
> >> bottom' have equal values and if 'top' and 'bottom' have equal values.
> >> ]
> >>
> >> because the border-top-width and border-bottom-width could be
> >> asymetrical.
> >
> > Fixed, also fixed absolute-non-replaced-max-height-003
> 
> 
> Arron,
> 
> The assert text I proposed for that particular testcase is correct. But if you
> want to be thorough (with a general rule), then it is:
> 
> if the sum of top value plus margin-top value is equal to the sum of bottom
> value plus margin-bottom value, then the border-box has to be vertically
> centered within its containing block.
> 

Corrected assert

--
Thanks,
Arron Eicholz
Received on Wednesday, 8 December 2010 16:21:22 GMT

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