[anchor-position] Fix anchor query scopes in multicol

When the containing block of querying element doesn't have anchor queries, |CalculateOffset| should use an empty |NGLogicalAnchorQuery|. However, |LayoutFragmentainerDescendants| passed |nullptr|, which means to use |container_builder_->AnchorQuery()|. In multicol, this means to use the anchor query for the multicol container. This patch fixes the situation by passing an empty |NGLogicalAnchorQuery|. Bug: 1309178 Change-Id: Ibb64d3f7932eb677f70063cee303b2e62ca5b918 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3922615 Commit-Queue: Koji Ishii <kojii@chromium.org> Reviewed-by: Alison Maher <almaher@microsoft.com> Cr-Commit-Position: refs/heads/main@{#1052100}
web-platform-tests · Sep 27, 2022 · 59999a1 · 59999a1
1 parent 2fa24e2
commit 59999a1
Showing 1 changed file with 54 additions and 0 deletions.
diff --git a/css/css-anchor-position/anchor-name-multicol-001.tentative.html b/css/css-anchor-position/anchor-name-multicol-001.tentative.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<title>Anchors in a different containing block in multicol</title>
+<link rel="help" href="https://tabatkins.github.io/specs/css-anchor-position/#propdef-anchor-name">
+<link rel="help" href="https://tabatkins.github.io/specs/css-anchor-position/#anchor-size">
+<link rel="author" href="mailto:kojii@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<style>
+.relpos {
+  position: relative;
+}
+.columns {
+  column-count: 2;
+  column-fill: auto;
+  column-gap: 10px;
+  column-width: 100px;
+  width: 210px;
+  height: 100px;
+}
+.spacer {
+  height: 10px;
+  background: pink;
+}
+.anchor1 {
+  anchor-name: --a1;
+  margin-left: 10px;
+  width: 40px;
+  height: 20px;
+  background: orange;
+}
+.target {
+  position: absolute;
+  left: anchor(--a1 left);
+  top: anchor(--a1 top);
+  width: anchor-size(--a1 width);
+  height: anchor-size(--a1 height);
+  background: lime;
+  opacity: .3;
+}
+</style>
+<body onload="checkLayout('.target')">
+  <div class="columns">
+    <div class="relpos">
+      <div class="spacer"></div>
+      <div class="anchor1"></div>
+    </div>
+    <div class="relpos">
+      <div class="target"
+           data-offset-x=0 data-offset-y=0
+           data-expected-width=0 data-expected-height=0></div>
+    </div>
+  </div>
+</body>