style: Use cbindgen for counters.

Differential Revision: https://phabricator.services.mozilla.com/D44403

components/style/properties/gecko.mako.rs

@@ -2579,8 +2579,7 @@ clip-path
     ${impl_simple('column_rule_style', 'mColumnRuleStyle')}
 </%self:impl_trait>
 
-<%self:impl_trait style_struct_name="Counters"
-                  skip_longhands="content counter-increment counter-reset counter-set">
+<%self:impl_trait style_struct_name="Counters" skip_longhands="content">
     pub fn ineffective_content_property(&self) -> bool {
         self.gecko.mContents.is_empty()
     }
@@ -2811,51 +2810,6 @@ clip-path
             }).collect::<Vec<_>>().into_boxed_slice()
         )
     }
-
-    % for counter_property in ["Increment", "Reset", "Set"]:
-        pub fn set_counter_${counter_property.lower()}(
-            &mut self,
-            v: longhands::counter_${counter_property.lower()}::computed_value::T
-        ) {
-            unsafe {
-                bindings::Gecko_ClearAndResizeCounter${counter_property}s(&mut *self.gecko, v.len() as u32);
-                for (i, pair) in v.0.into_vec().into_iter().enumerate() {
-                    self.gecko.m${counter_property}s[i].mCounter.set_move(
-                        RefPtr::from_addrefed(pair.name.0.into_addrefed())
-                    );
-                    self.gecko.m${counter_property}s[i].mValue = pair.value;
-                }
-            }
-        }
-
-        pub fn copy_counter_${counter_property.lower()}_from(&mut self, other: &Self) {
-            unsafe {
-                bindings::Gecko_CopyCounter${counter_property}sFrom(&mut *self.gecko, &*other.gecko)
-            }
-        }
-
-        pub fn reset_counter_${counter_property.lower()}(&mut self, other: &Self) {
-            self.copy_counter_${counter_property.lower()}_from(other)
-        }
-
-        pub fn clone_counter_${counter_property.lower()}(
-            &self
-        ) -> longhands::counter_${counter_property.lower()}::computed_value::T {
-            use crate::values::generics::counters::CounterPair;
-            use crate::values::CustomIdent;
-
-            longhands::counter_${counter_property.lower()}::computed_value::T::new(
-                self.gecko.m${counter_property}s.iter().map(|ref gecko_counter| {
-                    CounterPair {
-                        name: CustomIdent(unsafe {
-                            Atom::from_raw(gecko_counter.mCounter.mRawPtr)
-                        }),
-                        value: gecko_counter.mValue,
-                    }
-                }).collect()
-            )
-        }
-    % endfor
 </%self:impl_trait>
 
 <%self:impl_trait style_struct_name="UI" skip_longhands="-moz-force-broken-image-icon">

components/style/values/generics/counters.rs

@@ -25,12 +25,14 @@ use std::ops::Deref;
     ToResolvedValue,
     ToShmem,
 )]
-pub struct CounterPair<Integer> {
+#[repr(C)]
+pub struct GenericCounterPair<Integer> {
     /// The name of the counter.
     pub name: CustomIdent,
     /// The value of the counter / increment / etc.
     pub value: Integer,
 }
+pub use self::GenericCounterPair as CounterPair;
 
 /// A generic value for the `counter-increment` property.
 #[derive(
@@ -45,13 +47,15 @@ pub struct CounterPair<Integer> {
     ToResolvedValue,
     ToShmem,
 )]
-pub struct CounterIncrement<I>(pub Counters<I>);
+#[repr(transparent)]
+pub struct GenericCounterIncrement<I>(pub GenericCounters<I>);
+pub use self::GenericCounterIncrement as CounterIncrement;
 
 impl<I> CounterIncrement<I> {
     /// Returns a new value for `counter-increment`.
     #[inline]
     pub fn new(counters: Vec<CounterPair<I>>) -> Self {
-        CounterIncrement(Counters(counters.into_boxed_slice()))
+        CounterIncrement(Counters(counters.into()))
     }
 }
 
@@ -77,13 +81,15 @@ impl<I> Deref for CounterIncrement<I> {
     ToResolvedValue,
     ToShmem,
 )]
-pub struct CounterSetOrReset<I>(pub Counters<I>);
+#[repr(transparent)]
+pub struct GenericCounterSetOrReset<I>(pub GenericCounters<I>);
+pub use self::GenericCounterSetOrReset as CounterSetOrReset;
 
 impl<I> CounterSetOrReset<I> {
     /// Returns a new value for `counter-set` / `counter-reset`.
     #[inline]
     pub fn new(counters: Vec<CounterPair<I>>) -> Self {
-        CounterSetOrReset(Counters(counters.into_boxed_slice()))
+        CounterSetOrReset(Counters(counters.into()))
     }
 }
 
@@ -111,17 +117,9 @@ impl<I> Deref for CounterSetOrReset<I> {
     ToResolvedValue,
     ToShmem,
 )]
-pub struct Counters<I>(#[css(iterable, if_empty = "none")] Box<[CounterPair<I>]>);
-
-impl<I> Counters<I> {
-    /// Move out the Box into a vector. This could just return the Box<>, but
-    /// Vec<> is a bit more convenient because Box<[T]> doesn't implement
-    /// IntoIter: https://github.com/rust-lang/rust/issues/59878
-    #[inline]
-    pub fn into_vec(self) -> Vec<CounterPair<I>> {
-        self.0.into_vec()
-    }
-}
+#[repr(transparent)]
+pub struct GenericCounters<I>(#[css(iterable, if_empty = "none")] crate::OwnedSlice<GenericCounterPair<I>>);
+pub use self::GenericCounters as Counters;
 
 #[cfg(feature = "servo")]
 type CounterStyleType = ListStyleType;

components/style/values/specified/counters.rs

@@ -8,9 +8,9 @@
 use crate::computed_values::list_style_type::T as ListStyleType;
 use crate::parser::{Parse, ParserContext};
 use crate::values::generics::counters as generics;
-use crate::values::generics::counters::CounterIncrement as GenericCounterIncrement;
+use crate::values::generics::counters::GenericCounterIncrement;
 use crate::values::generics::counters::CounterPair;
-use crate::values::generics::counters::CounterSetOrReset as GenericCounterSetOrReset;
+use crate::values::generics::counters::GenericCounterSetOrReset;
 #[cfg(feature = "gecko")]
 use crate::values::generics::CounterStyle;
 use crate::values::specified::url::SpecifiedImageUrl;