enable text-overflow property for Servo

Signed-off-by: Richard Tjokroutomo <[email protected]>
Co-authored-by: Minghua Wu <[email protected]>

Author: RichardTjokroutomo

style/properties/longhands/text.mako.rs

@@ -9,7 +9,6 @@ ${helpers.predefined_type(
     "TextOverflow",
     "computed::TextOverflow::get_initial_value()",
     engines="gecko servo",
-    servo_pref="layout.unimplemented",
     animation_type="discrete",
     boxed=True,
     spec="https://drafts.csswg.org/css-ui/#propdef-text-overflow",

style/values/specified/text.rs

@@ -189,6 +189,7 @@ pub enum TextOverflowSide {
     /// Render ellipsis to represent clipped inline content.
     Ellipsis,
     /// Render a given string to represent clipped inline content.
+    #[cfg(feature = "gecko")]
     String(crate::values::AtomString),
 }
 
@@ -227,9 +228,10 @@ impl Parse for TextOverflow {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<TextOverflow, ParseError<'i>> {
-        let first = TextOverflowSide::parse(context, input)?;
+        let first = <TextOverflowSide as Parse>::parse(context, input)?;
         Ok(
-            if let Ok(second) = input.try_parse(|input| TextOverflowSide::parse(context, input)) {
+            if let Ok(second) = input.try_parse(|input| <TextOverflowSide as Parse>::parse(context, input)) {
+                #[cfg(feature = "gecko")]
                 Self {
                     first,
                     second,