The static-position rectangle for absolutely positioned flex children
still mapped cross-axis flex-start and flex-end directly to physical
start and end. That broke cases where the flex cross axis is reversed
by writing mode, direction, or wrap-reverse.
Teach the flex formatting context to derive the cross-axis direction
from its logical axes and wrap mode, and use that when resolving
cross-axis alignment for abspos static positioning. This clears the
newly imported position-absolute-013 test and improves a broader set
of existing flex abspos WPT baselines.
Import the css-flexbox abspos position-absolute-013 test from WPT so we
can track its current behavior locally.
The imported baseline currently has 432 subtests total, with 228
passing and 204 still failing.
Handle flex main and cross axes in logical terms so percentage
height resolution keeps working in vertical writing modes and
other orthogonal cases. Also let resolvable percentage max
cross sizes clamp stretched flex items.
The same change improves a broader set of imported css-flexbox
tests than the original percentage-heights cases. Update the
affected expectations in the same change so the resulting
behavior stays documented and the suite remains green.
This allows us to disable test output, which performs expensive assert
tracking. This was making our imported tests run significantly slower
than tests run via `WPT.sh`.
Formatting the output ourselves also allows us to remove unnecessary
information from the test output.
This commit also rebaselines all existing imported WPT tests to follow
the new format.
