style: Make the list-item increment not visible from the computed style.

This is per https://drafts.csswg.org/css-lists/#declaring-a-list-item.

I intentionally kept <li value> defined using attribute mapping, I think that's
saner than special-casing it in layout.

Differential Revision: https://phabricator.services.mozilla.com/D24935

1 files changed, 0 insertions, 39 deletions

diff --git a/components/style/style_adjuster.rs b/components/style/style_adjuster.rs
index e0efe35c86f..63af60e16ab 100644
--- a/components/style/style_adjuster.rs
+++ b/components/style/style_adjuster.rs
@@ -723,44 +723,6 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
         }
     }
 
-    /// For HTML elements with 'display:list-item' we add a default 'counter-increment:list-item'
-    /// unless 'counter-increment' already has a value for 'list-item'.
-    ///
-    /// https://drafts.csswg.org/css-lists-3/#declaring-a-list-item
-    #[cfg(feature = "gecko")]
-    fn adjust_for_list_item(&mut self) {
-        use crate::properties::longhands::counter_increment::computed_value::T as ComputedIncrement;
-        use crate::values::generics::counters::CounterPair;
-        use crate::values::specified::list::MozListReversed;
-        use crate::values::CustomIdent;
-
-        if self.style.get_box().clone_display() != Display::ListItem {
-            return;
-        }
-        if self.style.pseudo.is_some() {
-            return;
-        }
-
-        let increments = self.style.get_counters().clone_counter_increment();
-        if increments.iter().any(|i| i.name.0 == atom!("list-item")) {
-            return;
-        }
-
-        let reversed = self.style.get_list().clone__moz_list_reversed() == MozListReversed::True;
-        let increment = if reversed { -1 } else { 1 };
-        let list_increment = CounterPair {
-            name: CustomIdent(atom!("list-item")),
-            value: increment,
-        };
-        let increments = increments
-            .iter()
-            .cloned()
-            .chain(std::iter::once(list_increment));
-        self.style
-            .mutate_counters()
-            .set_counter_increment(ComputedIncrement::new(increments.collect()));
-    }
-
     /// Adjusts the style to account for various fixups that don't fit naturally
     /// into the cascade.
     ///
@@ -825,7 +787,6 @@ impl<'a, 'b: 'a> StyleAdjuster<'a, 'b> {
         #[cfg(feature = "gecko")]
         {
             self.adjust_for_appearance(element);
-            self.adjust_for_list_item();
         }
         self.set_bits();
     }