[css2.1] first-page-selectors-001 (was Re: [css-page] Issue with at-page-rule-001)

Le 2015-05-27 01:15, Toru Kawakubo a écrit :
>> 2015/05/24 11:00、Gérard Talbot <css21testsuite@gtalbot.org> のメール：
>> 
>>>> The description assumes that the cascaded value of margin-top is 
>>>> 50%.
>>> It is not perfectly clear what "exact center of this page" means.
>>> I do not believe that the cascaded value of margin-top should be 50%.
>>> I believe the cascaded value of margin-top should be 0.
> I found the same sentence
> "When printed the top left corner of this box must be in the exact
> center of this page."
> in this test case:
> https://github.com/w3c/csswg-test/blob/master/css21/page-box/first-page-selectors-001.xht
> 

[nightly-unstable]
http://test.csswg.org/suites/css2.1/nightly-unstable/html4/first-page-selectors-001.htm

[src]
http://test.csswg.org/source/css21/page-box/first-page-selectors-001.xht

"
Whether the first page of a document is :left or :right depends on the 
major writing direction of the root element. For example, the first page 
of a document with a left-to-right major writing direction would be a 
:right page, and the first page of a document with a right-to-left major 
writing direction would be a :left page.
"
13.2.2 Page selectors: selecting left, right, and first pages
http://www.w3.org/TR/2011/REC-CSS2-20110607/page.html#page-selectors

Yes. Here, in that test, the expression "exact center of this page" 
would need to indicate both the horizontal center and the vertical 
middle of the page.


> This test case has CSS
>  @page:first {
>    margin-top: 50%;
>  }
> , so the box's top left corner's vertical position is the center of
> the page's height.

Yes, the top left corner's vertical position is the center (I prefer to 
use "middle" for vertical axis) of the page's height.

One thing about the test; given the goal, purpose of the test, I do not 
see the need to use @page :first selector

> I guess the author intended to mean that margin-top should be 50% in
> at-page-rule-001 too.

Yes. I think so too. I understand your point. The wording of the 
pass-fail-conditions sentence can be confusing. Again, I think we should 
avoid the expression "exact center of this page" as it can mislead.

I have updated the Shepherd file on that test:
http://test.csswg.org/shepherd/testcase/first-page-selectors-001/

Toru, thank you for your excellent feedback on these tests. We are 
receptive to relevant comments on tests that have not been reviewed so 
far.

--------

Here's a modified (a bit simplified too) version of that test:

http://www.gtalbot.org/BrowserBugsSection/css21testsuite/first-page-selectors-001-GT.xht

Notice that such modified version does not declare @page :first 
selector.

Firefox 38 fails this test: that's bug 813187
https://bugzilla.mozilla.org/show_bug.cgi?id=813187

Chrome 43.0.2357.81 and Opera 12.16 pass this test. I do not know for
IE11.

Gérard
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Received on Wednesday, 27 May 2015 17:35:20 UTC