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[css-grid] About "infinitely growable" tracks in the sizing algorithm

From: Sergio Villar Senin <svillar@igalia.com>
Date: Mon, 02 Feb 2015 16:59:42 +0100
Message-ID: <54CF9EEE.9020208@igalia.com>
To: www-style@w3.org
CC: Rossen.Atanassov@microsoft.com, psalas@microsoft.com
Hi,

I was lately wondering why we need this thing of "mark/unmark as
infinitely growable"[1] step in the track sizing algorithm. I'm
including some Microsoft folks on Cc because this comes from the initial
algorithm. My point is, I think having something like this is useless as
it does not add any specific new behavior to the algorithm. Let me
explain why.

The last two steps of "Increase sizes to accommodate spanning items"
section are only run for those tracks whose max track sizing function is
max-content (tracks with min-content as max track sizing function are
only considered for the first of those two steps).

So we have two possibilities when evaluating intrinsic maximums:

1- the growth limit does not change from infinite to finite: then the
track is still infinitely growable for the last step and we don't need
to mark anything as infinitely growable.

2- the growth limit changes from infinite to finite: in this case we
don't need to mark anything as infinitely growable, because when
evaluating the max-content maximums all those tracks will be eligible to
grow beyond limits (as they're max-content) so they'll effectively
behave as if they were infinitely growable.

Am I missing something?

BR

[1] http://dev.w3.org/csswg/css-grid/#infinitely-growable
Received on Monday, 2 February 2015 16:00:15 UTC

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