style: Add an 'auto' value for the CSS 'quotes' property, and make it use language-dependent quote marks.

Differential Revision: https://phabricator.services.mozilla.com/D36429

components/style/values/computed/list.rs

@@ -7,28 +7,12 @@
 #[cfg(feature = "gecko")]
 pub use crate::values::specified::list::ListStyleType;
 pub use crate::values::specified::list::MozListReversed;
-pub use crate::values::specified::list::{QuotePair, Quotes};
+pub use crate::values::specified::list::Quotes;
-
-lazy_static! {
-    static ref INITIAL_QUOTES: crate::ArcSlice<QuotePair> = crate::ArcSlice::from_iter_leaked(
-        vec![
-            QuotePair {
-                opening: "\u{201c}".to_owned().into(),
-                closing: "\u{201d}".to_owned().into(),
-            },
-            QuotePair {
-                opening: "\u{2018}".to_owned().into(),
-                closing: "\u{2019}".to_owned().into(),
-            },
-        ]
-        .into_iter()
-    );
-}
 
 impl Quotes {
     /// Initial value for `quotes`.
     #[inline]
     pub fn get_initial_value() -> Quotes {
-        Quotes(INITIAL_QUOTES.clone())
+        Quotes::Auto
     }
 }

components/style/values/computed/mod.rs

@@ -64,7 +64,7 @@ pub use self::length::{NonNegativeLengthPercentage, NonNegativeLengthPercentageO
 #[cfg(feature = "gecko")]
 pub use self::list::ListStyleType;
 pub use self::list::MozListReversed;
-pub use self::list::{QuotePair, Quotes};
+pub use self::list::Quotes;
 pub use self::motion::{OffsetPath, OffsetRotate};
 pub use self::outline::OutlineStyle;
 pub use self::percentage::{NonNegativePercentage, Percentage};

components/style/values/specified/list.rs

@@ -104,7 +104,7 @@ pub struct QuotePair {
     pub closing: crate::OwnedStr,
 }
 
-/// Specified and computed `quotes` property.
+/// List of quote pairs for the specified/computed value of `quotes` property.
 #[derive(
     Clone,
     Debug,
@@ -117,23 +117,53 @@ pub struct QuotePair {
     ToResolvedValue,
     ToShmem,
 )]
-#[repr(C)]
+#[repr(transparent)]
-pub struct Quotes(
+pub struct QuoteList(
     #[css(iterable, if_empty = "none")]
     #[ignore_malloc_size_of = "Arc"]
     pub crate::ArcSlice<QuotePair>,
 );
 
+/// Specified and computed `quotes` property: `auto`, `none`, or a list
+/// of characters.
+///
+/// cbindgen:derive-tagged-enum-copy-constructor=true
+#[derive(
+    Clone,
+    Debug,
+    MallocSizeOf,
+    PartialEq,
+    SpecifiedValueInfo,
+    ToComputedValue,
+    ToCss,
+    ToResolvedValue,
+    ToShmem,
+)]
+#[repr(C)]
+pub enum Quotes {
+    /// list of quote pairs
+    QuoteList(QuoteList),
+    /// auto (use lang-dependent quote marks)
+    Auto,
+}
+
 impl Parse for Quotes {
     fn parse<'i, 't>(
         _: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Quotes, ParseError<'i>> {
+        if input
+            .try(|input| input.expect_ident_matching("auto"))
+            .is_ok()
+        {
+            return Ok(Quotes::Auto);
+        }
+
         if input
             .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
-            return Ok(Self::default());
+            return Ok(Quotes::QuoteList(QuoteList::default()))
         }
 
         let mut quotes = Vec::new();
@@ -150,7 +180,7 @@ impl Parse for Quotes {
         }
 
         if !quotes.is_empty() {
-            Ok(Quotes(crate::ArcSlice::from_iter(quotes.into_iter())))
+            Ok(Quotes::QuoteList(QuoteList(crate::ArcSlice::from_iter(quotes.into_iter()))))
         } else {
             Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError))
         }

components/style/values/specified/mod.rs

@@ -65,7 +65,7 @@ pub use self::length::{NonNegativeLengthPercentage, NonNegativeLengthPercentageO
 #[cfg(feature = "gecko")]
 pub use self::list::ListStyleType;
 pub use self::list::MozListReversed;
-pub use self::list::{QuotePair, Quotes};
+pub use self::list::Quotes;
 pub use self::motion::{OffsetPath, OffsetRotate};
 pub use self::outline::OutlineStyle;
 pub use self::percentage::Percentage;