[css-lists] Apply new algorithm for initial counter in reversed list

jja08111 · chromium-wpt-export-bot · commit 0608332f8fa6 · 2025-11-10T03:03:14.000-08:00
This CL applies the last non-zero increment version algorithm[1] that accounts an initial counter value. If we have an explicit start value, we don't apply a counter increment of the list item. E.g., if the list is reversed, then plus one, else minus one to the initial counter value. This is same as Firefox's behaviour. And this CL renames functions which is related an instantiating counters to `InitialCounter*` for aligning with the spec. [1]: w3c/csswg-drafts#6797 Bug: 40682542 Change-Id: I8188288062461ca4c5689e530db3255f9c31ebcb Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7126701 Commit-Queue: Minseong Kim <jja08111@gmail.com> Reviewed-by: Daniil Sakhapov <sakhapov@chromium.org> Reviewed-by: Rune Lillesveen <futhark@chromium.org> Cr-Commit-Position: refs/heads/main@{#1542452}
diff --git a/css/css-lists/li-value-reversed-012.html b/css/css-lists/li-value-reversed-012.html
@@ -5,7 +5,7 @@
 <link rel="help" href="https://drafts.csswg.org/css-lists-3/#auto-numbering">
 <link rel="help" href="https://drafts.csswg.org/css-lists-3/#instantiating-counters">
 <link rel="author" title="Minseong Kim" href="mailto:jja08111@gmail.com">
-<link rel="match" href="li-value-reversed-012-ref.html">
+<link rel="match" href="li-value-reversed-011-ref.html">
 <ol reversed>
  <li style="counter-increment: list-item -2">Three
  <li>Two
diff --git a/css/css-lists/li-value-reversed-021.html b/css/css-lists/li-value-reversed-021.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<title>Interaction of ol reversed and list-item value</title>
+<link rel="help" href="https://html.spec.whatwg.org/#attr-ol-reversed">
+<link rel="help" href="https://html.spec.whatwg.org/#ordinal-value">
+<link rel="help" href="https://drafts.csswg.org/css-lists-3/#auto-numbering">
+<link rel="help" href="https://drafts.csswg.org/css-lists-3/#instantiating-counters">
+<link rel="author" title="Minseong Kim" href="mailto:jja08111@gmail.com">
+<link rel="match" href="li-value-reversed-011-ref.html">
+<ol reversed start=5>
+ <li style="counter-increment: list-item -3">Three
+ <li>Two
+ <li>One
+</ol>
diff --git a/css/css-lists/li-value-reversed-022-ref.html b/css/css-lists/li-value-reversed-022-ref.html
@@ -1,7 +1,9 @@
 <!doctype html>
 <title>CSS Test Reference</title>
 <ol>
- <li value=3>Three
+ <li value=6>Six
+ <li value=5>Five
+ <li value=4>Four
  <li value=2>Two
  <li value=1>One
 </ol>
diff --git a/css/css-lists/li-value-reversed-022.html b/css/css-lists/li-value-reversed-022.html
@@ -0,0 +1,15 @@
+<!doctype html>
+<title>Interaction of ol reversed and list-item value</title>
+<link rel="help" href="https://html.spec.whatwg.org/#attr-ol-reversed">
+<link rel="help" href="https://html.spec.whatwg.org/#ordinal-value">
+<link rel="help" href="https://drafts.csswg.org/css-lists-3/#auto-numbering">
+<link rel="help" href="https://drafts.csswg.org/css-lists-3/#instantiating-counters">
+<link rel="author" title="Minseong Kim" href="mailto:jja08111@gmail.com">
+<link rel="match" href="li-value-reversed-022-ref.html">
+<ol reversed>
+ <li>Six
+ <li style="counter-set: list-item 5">Five
+ <li>Four
+ <li style="counter-set: list-item 2">Two
+ <li>One
+</ol>
