On Friday 2014-02-14 15:53 -0800, Patrick Walton wrote: > So I just looked at the relevant piece of this spec and I'm confused: > > http://dev.w3.org/csswg/css-overflow-3/#fragment-pseudo-element > > Suppose that I have a document like this: > > <style> > .a { position: relative; } > .b { > position: absolute; > overflow: fragments; > top: 5%; > bottom: 5%; > right: 0; > width: 100px; > } > .b::nth-fragment(2) { position: static; } > </style> > > <div class=a> > Foo > <div class=b> > Four score and seven years ago blah blah blah... > </div> > </div> > > So we lay out `a` to determine its height. Now we know the height of > `b`. Then we lay out `b`. Because there isn't enough room for its > multiple lines to fit given its height limit, we create some > fragments. Fragment 2 has `position: static` (which is explicitly > allowed by the spec), so now it has to be inserted as a block kid of > `a`. So we go to reflow `a` again. Now it has a different, taller > height, which of course affects `b`. Now `b` has a larger > height--suppose that it's now tall enough to not generate any > fragments! So we remove the static kid of `a`, making `a` is > shorter. We go to reflow it again, and we're back where we started. > The layout seems nonterminating... > > Is there something I'm missing?
No. The regions spec says that you do two passes and then stop. The overflow:fragments spec should probably either (a) say the same or (b) require fragments following an absolutely positioned fragment to also be absolutely positioned. I'm in favor of (b), I think. (I think there might also need to be a constraint about floats.) -David -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla https://www.mozilla.org/ 𝄂 Before I built a wall I'd ask to know What I was walling in or walling out, And to whom I was like to give offense. - Robert Frost, Mending Wall (1914)
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