Bug 1844311 [wpt PR 41103] - [mathml] Draw a radical symbol for empty…

… <mqsrt> elements., a=testonly Automatic update from web-platform-tests [mathml] Draw a radical symbol for empty <mqsrt> elements. MathML Core says that the <msqrt> element generates an anonymous mrow called the msqrt base, which is then used for layout [1]. In Blink's implementation, LayoutNGMathMLBlockWithAnonymousMrow only creates such an anonymous mrow when a first child is inserted. This CL ensures that the algo and paint classes handle the case of an empty <msqrt> the same as if there was an empty <mrow>. [1] https://w3c.github.io/mathml-core/#radicals-msqrt-mroot Bug: 1420632 Change-Id: I5db2577dc285bf2822586dee3eecbfb0d13dfb25 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4698254 Commit-Queue: Frédéric Wang <[email protected]> Reviewed-by: Ian Kilpatrick <[email protected]> Cr-Commit-Position: refs/heads/main@{#1172421} -- wpt-commits: 88dd1bff7f5370b0e330b06dff18756eab447714 wpt-pr: 41103
Thaodan · Jul 22, 2023 · 5a25a25 · 5a25a25
1 parent 34c39ba
commit 5a25a25
Show file tree

Hide file tree

Showing 2 changed files with 25 additions and 0 deletions.
diff --git a/testing/web-platform/tests/mathml/presentation-markup/radicals/empty-msqrt-ref.html b/testing/web-platform/tests/mathml/presentation-markup/radicals/empty-msqrt-ref.html
@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Empty &lt;msqrt&gt; element (reference)</title>
+  </head>
+  <body>
+    <math><msqrt><mrow></mrow></msqrt></math>
+  </body>
+</html>
diff --git a/testing/web-platform/tests/mathml/presentation-markup/radicals/empty-msqrt.html b/testing/web-platform/tests/mathml/presentation-markup/radicals/empty-msqrt.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8"/>
+    <title>Empty &lt;msqrt&gt; element</title>
+    <link rel="help" href="https://w3c.github.io/mathml-core/#radicals-msqrt-mroot">
+    <meta name="assert" content="Empty msqrt should render as if it had a single empty mrow child.">
+    <link rel="match" href="empty-msqrt-ref.html">
+  </head>
+  <body>
+    <math><msqrt></msqrt></math>
+    <script src="/mathml/support/feature-detection.js"></script>
+    <script>MathMLFeatureDetection.ensure_for_match_reftest("has_msqrt");</script>
+  </body>
+</html>