tor-browser

commit 175e4ab73d6ac0fd05030107546e969af208071d
parent f465bef00d657c5295a5e309a5ae38886bdd1272
Author: David Shin <dshin@mozilla.com>
Date:   Tue, 16 Dec 2025 22:31:59 +0000

Bug 2006352: Compensate for scroll when only using anchor-center. r=layout-anchor-positioning-reviewers,layout-reviewers,emilio

Differential Revision: https://phabricator.services.mozilla.com/D276670

Diffstat:
M
layout/generic/AbsoluteContainingBlock.cpp
 | 
4
+++-
D
testing/web-platform/meta/css/css-anchor-position/anchor-center-scroll.html.ini
 | 
2
--

2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/layout/generic/AbsoluteContainingBlock.cpp b/layout/generic/AbsoluteContainingBlock.cpp
@@ -777,12 +777,14 @@ static nscoord OffsetToAlignedStaticPos(
   Maybe<CSSAlignUtils::AnchorAlignInfo> anchorAlignInfo;
   if (alignConst == StyleAlignFlags::ANCHOR_CENTER &&
       aKidReflowInput.mAnchorPosResolutionCache) {
-    const auto* referenceData =
+    auto* referenceData =
         aKidReflowInput.mAnchorPosResolutionCache->mReferenceData;
     if (referenceData) {
       const auto* cachedData =
           referenceData->Lookup(referenceData->mDefaultAnchorName);
       if (cachedData && *cachedData) {
+        referenceData->AdjustCompensatingForScroll(
+            aAbsPosCBWM.PhysicalAxis(aAbsPosCBAxis));
         const auto& data = cachedData->ref();
         if (data.mOffsetData) {
           const nsSize containerSize =
diff --git a/testing/web-platform/meta/css/css-anchor-position/anchor-center-scroll.html.ini b/testing/web-platform/meta/css/css-anchor-position/anchor-center-scroll.html.ini
@@ -1,2 +0,0 @@
-[anchor-center-scroll.html]
-  expected: FAIL