Aliaksandr Kalenik fe8304d5de LibWeb: Introduce structure that maintains collapsible margins in BFC ...

Previously y position of boxes in block formatting context
was calculated by looking at y position of previous in-flow
sibling and adding collapsed margin of "collapse through"
boxes lying between box currently being laid out and it's
previous in-flow sibling.

Here introduced BlockMarginState structure that maintains
array of currently collapsible margins hence we no longer
need to look at previous sibling to calculate y position
of a box.

2022-12-30 14:21:19 +01:00

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