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[css3-multicol] Review of multicol-count-large-001 and questions

From: Gérard Talbot <css21testsuite@gtalbot.org>
Date: Mon, 29 Jul 2013 23:17:41 -0400
Message-ID: <bb9e74b1783062ae29e8365defdafbd8.squirrel@ed-sh-cp3.entirelydigital.com>
To: "Håkon Wium Lie" <howcome@opera.com>
Cc: "Public css-testsuite mailing list" <public-css-testsuite@w3.org>
Hello,

[src]
http://test.csswg.org/source/contributors/opera/submitted/multicol/multicol-count-large-001.xht

[reftest]
http://test.csswg.org/source/contributors/opera/submitted/multicol/multicol-count-large-ref.xht

The reftest suggests that the last "xx" (rightmost pair of "x"s in black
span) is going to be displayed, rendered without any clipping. So, this
is a mystery to me.

If used column-width is close to 0px (or, rather, 12em / 1000 ==
0.012em) and if inline content that overflows inside a column box should
be clipped at middle of column-gap [1] (in this test, column-gap is 0),
then the whole (or 0.988em of it) inline content should be clipped and
this for each of the first 8 column boxes (there is 8 pairs of "x"s in
the test).

So, I think the reftest is wrong. After careful reading of spec., I do
not see why the last pair of "x"s should be rendered without clipping.

So, I think Chrome 28.0.1500.71 has the correct rendering of the test
...albeit I assume I see 6 side-by-side consecutive 0.012em of red and
then 2 side-by-side consecutive 0.012em of black while using Chrome 28.

Why the reftest is assumed to be correct?

The same question would also apply to
http://test.csswg.org/source/contributors/opera/submitted/multicol/multicol-count-large-002.xht

What am I missing here?

[1]:
8.1. Overflow inside multicol elements
"
Content in the normal flow that extends into column gaps (e.g., long
words or images) is clipped in the middle of the column gap.
"
http://www.w3.org/TR/css3-multicol/#overflow-inside-multicol-elements

Gérard
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Received on Tuesday, 30 July 2013 03:18:10 UTC

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