Bugzilla

As noted in bug 1455976 15, there's some special-case flexbox spec text for table wrapper boxes as flex items (pulling info from their child table boxes):

# like width and height, the flex longhands
# apply to the table box as follows: the flex item’s
# final size is calculated by performing layout as if
# the distance between the table wrapper box’s edges
# and the table box’s content edges were all part of
# the table box’s border+padding area, and the
# table box were the flex item.
https://drafts.csswg.org/css-flexbox/#flex-items

This will end up making us *behave* as if a display:table flex child were a growable/shrinkable flex item like any other (but possibly with some extra space reserved for the wrapper box, e.g. if there's a caption that requires more space in the main axis than we'd otherwise allocate for our flex base size).


I think this will require a bit of special-case code during the "resolve the flexible lengths" chunk of flex layout, as well as everywhere that we deal with a flex item's hypothetical size (e.g. when figuring out how many flex items fit on a multiline flex container's flex line).

As noted in bug 1455976 comment 15, there's some special-case flexbox spec text for table wrapper boxes as flex items (pulling info from their child table boxes):

# like width and height, the flex longhands
# apply to the table box as follows: the flex item’s
# final size is calculated by performing layout as if
# the distance between the table wrapper box’s edges
# and the table box’s content edges were all part of
# the table box’s border+padding area, and the
# table box were the flex item.
https://drafts.csswg.org/css-flexbox/#flex-items

This will end up making us *behave* as if a display:table flex child were a growable/shrinkable flex item like any other (but possibly with some extra space reserved for the wrapper box, e.g. if there's a caption that requires more space in the main axis than we'd otherwise allocate for our flex base size).


I think this will require a bit of special-case code during the "resolve the flexible lengths" chunk of flex layout, as well as everywhere that we deal with a flex item's hypothetical size (e.g. when figuring out how many flex items fit on a multiline flex container's flex line).