Oriol Brufau 876abf9001 layout: Remove box damage for parent when we can reuse the box (#42847) ...

This fixes an oversight from #42783: when detecting that a box can be
reused, we weren't clearing the box damage propagated to ancestors, so
ancestors were still recollecting children.

This exposed some problems in
`rebuild_box_tree_from_independent_formatting_context()`:
1. When reusing a block-level box that established an independent
formatting context, we weren't checking that the new style was still
block-level.
2. When reusing a block-level abspos box, we weren't checking if the new
original display was inline-level, preventing it from being handled as a
block-level because of the static position.
3. When reusing a flex item, we weren't checking if the `order` had
changed.

Testing: we have test coverage for the 3 problems above:
1. Covered by
`/html/rendering/non-replaced-elements/the-fieldset-and-legend-elements/legend-display.html`,
and also adding a new `/css/css-display/display-flow-root-dynamic.html`.
2. Covered by `/css/CSS2/abspos/hypothetical-box-dynamic.html`
3. Covered by `/css/css-display/order-dynamic.html`.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Co-authored-by: Luke Warlow <lwarlow@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

2026-02-26 19:23:04 +00:00

..

geom.rs

layout: Combine layout_2020 and layout_thread_2020 into a crate called layout (#36613)

2025-04-19 10:17:03 +00:00

layout.rs

layout: Properly propagate baselines of flex items that do not participate in baseline alignment (#42038)

2026-01-28 16:36:42 +00:00

mod.rs

layout: Remove box damage for parent when we can reuse the box (#42847)

2026-02-26 19:23:04 +00:00