Sandbox::https://github.com/DioxusLabs/blitz/pull/960

nicoburns · 2026-09-27T17:08:06Z

Summary

Fixes the ten new High/Medium findings from the review of #887, in review order with a separate implementation commit per issue.

The base branch mirrors that PR's exact head, e6c68325ed5f44d7b245448ce4ab489c92355d15, because its fork branch is not writable here. This PR contains only the follow-up fixes; it does not target main.

Ordered fixes

Validate removed nodes and cached dependencies before scroll-time refresh.
Clear stale visual offsets when sticky registration ends.
Register generated ::before / ::after boxes during box construction.
Recompute ancestor ordering after reparenting.
Canonicalize root overflow to viewport scroll state and dimensions.
Reduce the effective logical end inset when the sticky view rectangle cannot fit the border box.
Target the current sticky position in scrollIntoView().
Separate local offsets from inherited table-part offsets; cache the cells receiving each shift instead of recursively adding to their local offset.
Measure non-atomic inline stickies from their Parley fragments and apply the same offsets to CSSOM, hits, text positions, glyphs, backgrounds, decorations, selection, and atomic children.
Use actual scrollports through fixed ancestors, while excluding viewport scroll from viewport-fixed constraints. Share fixed-containing-block detection across geometry, paint, and hits.

Follow-up commits fix a test borrow and issues found during integration validation: viewport hit coordinates, root filter hints, and discarded anonymous layout ancestors. Public hit testing accepts viewport coordinates; pointer dispatch retains its document-coordinate path.

Validation

cargo test --workspace — passed, including 18 sticky integration regressions and a CPU-rendered pixel comparison before/after scrolling.
cargo test -p blitz-dom sticky --lib — 8 passed.
cargo clippy --workspace — passed without warnings.
cargo fmt --all --check and git diff --check — passed.
Focused WPT runs verified both root-filter-hint tests pass and the multicol/inline crash test now passes (it crashes on the exact base).
CI — all 15 checks passed (archive job skipped).

WPT caveats

position-sticky-scrollIntoView.html expects the unshifted position and now fails. That expectation conflicts with CSS Position §3.4.1, which requires the offsetted position. Fix 7 follows the current spec; the upstream test was not modified.

sticky-anchor-position-invalid.html fails on both this branch and the exact PR 887 base; verified by running the same WPT selection in both worktrees.

Link to Devin session: https://dioxus.staging.devinenterprise.com/sessions/33b0f32fbc4e42eeaefaf6ba857eb5f3
Open in Devin Desktop: https://dioxus.staging.devinenterprise.com/desktop/session/33b0f32fbc4e42eeaefaf6ba857eb5f3?variant=devin-insiders
Requested by: @nicoburns

WPT results

Subtests: 216 newly passing, 2 newly failing (net +214).

Subtest changes by area (10 areas)

+ css                   | +214 (+216 / -2) | 59.64% -> 59.75% ( +0.11%) | 118842 -> 119056 / 199259
!   css-anchor-position |   +0 (  +1 / -1) | 13.89% -> 13.89% ( +0.00%) |   1933 ->   1933 /  13916
+   css-contain         |   +1 (  +1 / -0) | 47.69% -> 47.79% ( +0.10%) |    465 ->    466 /    975
+   css-grid            |   +4 (  +4 / -0) | 77.99% -> 78.01% ( +0.02%) |  13731 ->  13735 /  17606
+     alignment         |   +4 (  +4 / -0) | 83.70% -> 83.90% ( +0.20%) |   1638 ->   1642 /   1957
+   css-position        |  +63 ( +64 / -1) | 66.11% -> 69.74% ( +3.62%) |   1149 ->   1212 /   1738
+     sticky            |  +62 ( +63 / -1) | 31.71% -> 69.51% (+37.80%) |     52 ->    114 /    164
+   css-tables          |   +1 (  +1 / -0) | 53.06% -> 53.15% ( +0.09%) |    590 ->    591 /   1112
+     tentative         |   +1 (  +1 / -0) | 28.69% -> 28.97% ( +0.28%) |    103 ->    104 /    359
+   cssom               | +145 (+145 / -0) | 78.61% -> 81.92% ( +3.31%) |   3448 ->   3593 /   4386

Full diff (48 changed tests)

+ FAIL => PASS      [1/1]   +1  css/css-anchor-position/anchor-sticky-fixed-drift.html
- PASS => FAIL      [0/1]   -1  css/css-anchor-position/sticky-anchor-position-invalid.html
+ FAIL => PASS      [1/1]   +1  css/css-contain/contain-layout-021.html
+ FAIL => PASS      [2/2]   +2  css/css-grid/alignment/grid-column-axis-alignment-sticky-positioned-items-002.html
+ FAIL => PASS      [2/2]   +2  css/css-grid/alignment/grid-row-axis-alignment-sticky-positioned-items-002.html
+ FAIL => PASS      [1/1]   +1  css/css-position/position-sticky-dynamic-ancestor-001.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-bottom-002.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-bottom-003.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-bottom-007.html
+ FAIL => PASS      [3/3]   +2  css/css-position/sticky/position-sticky-bottom.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-contained-by-display-table.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-escape-scroller-004.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-fixed-ancestor-002.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-fixed-ancestor-003.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-fixed-ancestor.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-flexbox.html
+ FAIL => FAIL      [1/3]   +1  css/css-position/sticky/position-sticky-get-bounding-client-rect.html
+ FAIL => PASS      [4/4]   +4  css/css-position/sticky/position-sticky-horizontal-rtl-overconstrained.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-in-fixed-container.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-inflow-position.html
+ FAIL => PASS      [4/4]   +4  css/css-position/sticky/position-sticky-left-and-right-overconstrained.html
+ FAIL => PASS      [3/3]   +2  css/css-position/sticky/position-sticky-left.html
+ FAIL => PASS      [3/3]   +2  css/css-position/sticky/position-sticky-margins.html
+ FAIL => PASS      [5/5]   +3  css/css-position/sticky/position-sticky-nested-bottom.html
+ FAIL => PASS      [5/5]   +4  css/css-position/sticky/position-sticky-nested-left.html
+ FAIL => PASS      [5/5]   +3  css/css-position/sticky/position-sticky-nested-right.html
+ FAIL => PASS      [5/5]   +4  css/css-position/sticky/position-sticky-nested-top.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-offset-overflow.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-offset-print.html
+ FAIL => PASS      [2/2]   +2  css/css-position/sticky/position-sticky-offset-top-left.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-padding-001.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-padding-002.html
+ FAIL => PASS      [3/3]   +2  css/css-position/sticky/position-sticky-right.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-root-scroller.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-rtl.html
- PASS => FAIL      [0/1]   -1  css/css-position/sticky/position-sticky-scrollIntoView.html
+ FAIL => FAIL      [1/2]   +1  css/css-position/sticky/position-sticky-single-axis-basic.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-single-axis-nested.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-top-002.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-top-003.html
+ FAIL => PASS      [1/1]   +1  css/css-position/sticky/position-sticky-top-and-bottom-003.html
+ FAIL => PASS      [4/4]   +4  css/css-position/sticky/position-sticky-top-and-bottom-overconstrained.html
+ FAIL => PASS      [2/2]   +2  css/css-position/sticky/position-sticky-top-and-bottom.html
+ FAIL => PASS      [3/3]   +2  css/css-position/sticky/position-sticky-top.html
+ FAIL => FAIL      [1/3]   +1  css/css-tables/tentative/position-sticky-container.html
+ FAIL => PASS  [252/252]  +72  css/cssom/getComputedStyle-insets-sticky-container-for-abspos.html
+ FAIL => PASS  [252/252]  +72  css/cssom/getComputedStyle-insets-sticky.html
+ FAIL => PASS      [1/1]   +1  css/cssom/getComputedStyle-sticky-pos-percent.html

_{Generated by the WPT workflow.}

staging-devin-ai-integration · 2026-09-27T17:08:10Z

I'll fix CI failures and address comments from users with write access that start with 'Devin'.

Disable automatic comment, CI, and merge conflict monitoring

…fresh

… expose them to getComputedStyle

…fsets

staging-devin-ai-integration Bot assigned nicoburns Sep 27, 2026

nicoburns changed the base branch from devin/1790528855-sticky-887-base to main October 13, 2026 10:37

staging-devin-ai-integration Bot force-pushed the devin/1790527540-sticky-review-fixes branch 2 times, most recently from 019d937 to f12a8fc Compare October 28, 2026 22:42

LinuxBoy-96 and others added 25 commits October 30, 2026 16:26

Implement position: sticky

c44a5ff

sticky positions bugs fix

8eeab53

Fix transformed ancestor + rustfmt

1e79ca2

sticky optimization

546a0ab

Single geometry funnel

a02fd28

Sticky: re-registration after re-insert, layout-parent walk, paint re…

41ee7f8

…fresh

Sticky registry: check Display::is_none, clear flag inside retain

e62c643

Adapt sticky to the post-layout paint tree and out-of-flow hoisting

4f34605

Sticky: resolve percentage insets against the scrollport content box;…

d83e3bf

… expose them to getComputedStyle

fix(sticky): tolerate removed nodes during scroll refresh

36ad109

fix(sticky): clear visual offsets when unregistering boxes

8b77193

fix(sticky): register pseudo-elements during box construction

20da892

test(sticky): keep pseudo-element document borrow alive

81698ef

fix(sticky): refresh ancestor ordering after reparenting

e27cee0

fix(sticky): canonicalize root scrolling to the viewport

5c327ed

fix(sticky): enlarge the view rectangle for oversized boxes

c193355

fix(sticky): scroll into view using the offsetted position

f1a780e

fix(sticky): separate inherited table shifts from local offsets

071f70b

fix(sticky): apply inline fragment offsets across geometry consumers

8f13173

fix(sticky): distinguish fixed coordinates from scroll containers

10d6ef2

fix(sticky): reconcile viewport hit tests with fixed geometry

bb76bef

fix(sticky): preserve viewport fixed boxes under root filter hints

8cd7c78

fix(sticky): tolerate discarded anonymous layout ancestors

5ff68fc

fix(sticky): adapt sticky.rs to main's geometry and style APIs

02092e7

fix(sticky): skip dropped nodes when resolving text cluster sticky of…

be20222

…fsets

test(sticky): register sticky_positioning tests in all.rs

846b222

staging-devin-ai-integration Bot force-pushed the devin/1790527540-sticky-review-fixes branch from f12a8fc to 846b222 Compare October 30, 2026 16:37

krazyjakee mentioned this pull request Nov 10, 2026

[Native UI] Upstream fixes we carry and the workarounds to remove when they land krazyjakee/caskade#127

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Fix sticky positioning lifecycle and geometry issues from #887 - #960

Fix sticky positioning lifecycle and geometry issues from #887#960
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Ordered fixes

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WPT caveats

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