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Add another incremental layout that starts at stacking tree construction (#37088)

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This allows to skip rebuilding the box tree when it's only necessary to
rebuild the stacking context tree.
Bumps Stylo to https://github.com/servo/stylo/pull/187

Testing: Unneeded (no behavior change). Just improving performance.
However, this adds a new test for dynamic changes of `z-index`, which we
were breaking in an earlier iteration of this patch.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Oriol Brufau 2025-05-24 01:40:02 +02:00 • committed by GitHub
parent 1f5087d773
commit d18000fee8
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5 changed files with 78 additions and 22 deletions
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4
components/layout/traversal.rs
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@ -131,7 +131,9 @@ pub(crate) fn compute_damage_and_repair_style_inner(
}
}
if propagated_damage == RestyleDamage::REPAINT && original_damage == RestyleDamage::REPAINT {
if !propagated_damage.contains(RestyleDamage::REBUILD_BOX) &&
!original_damage.contains(RestyleDamage::REBUILD_BOX)
{
node.repair_style(context);
}