style: Move background-repeat and mask-repeat outside of mako.

components/style/values/specified/background.rs

@@ -15,7 +15,10 @@ use values::specified::length::LengthOrPercentageOrAuto;
 pub type BackgroundSize = GenericBackgroundSize<LengthOrPercentageOrAuto>;
 
 impl Parse for BackgroundSize {
-    fn parse<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
+    fn parse<'i, 't>(
+        context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
         if let Ok(width) = input.try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i)) {
             let height = input
                 .try(|i| LengthOrPercentageOrAuto::parse_non_negative(context, i))
@@ -41,3 +44,59 @@ impl BackgroundSize {
         }
     }
 }
+
+/// One of the keywords for `background-repeat`.
+define_css_keyword_enum! { RepeatKeyword:
+    "repeat" => Repeat,
+    "space" => Space,
+    "round" => Round,
+    "no-repeat" => NoRepeat
+}
+
+/// The specified value for the `background-repeat` property.
+///
+/// https://drafts.csswg.org/css-backgrounds/#the-background-repeat
+#[derive(Clone, Debug, MallocSizeOf, PartialEq, ToCss)]
+pub enum BackgroundRepeat {
+    /// `repeat-x`
+    RepeatX,
+    /// `repeat-y`
+    RepeatY,
+    /// `[repeat | space | round | no-repeat]{1,2}`
+    Keywords(RepeatKeyword, Option<RepeatKeyword>),
+}
+
+impl BackgroundRepeat {
+    /// Returns the `repeat` value.
+    #[inline]
+    pub fn repeat() -> Self {
+        BackgroundRepeat::Keywords(RepeatKeyword::Repeat, None)
+    }
+}
+
+impl Parse for BackgroundRepeat {
+    fn parse<'i, 't>(
+        _context: &ParserContext,
+        input: &mut Parser<'i, 't>,
+    ) -> Result<Self, ParseError<'i>> {
+        let ident = input.expect_ident_cloned()?;
+
+        match_ignore_ascii_case! { &ident,
+            "repeat-x" => return Ok(BackgroundRepeat::RepeatX),
+            "repeat-y" => return Ok(BackgroundRepeat::RepeatY),
+            _ => {},
+        }
+
+        let horizontal = match RepeatKeyword::from_ident(&ident) {
+            Ok(h) => h,
+            Err(()) => {
+                return Err(input.new_custom_error(
+                    SelectorParseErrorKind::UnexpectedIdent(ident.clone())
+                ));
+            }
+        };
+
+        let vertical = input.try(RepeatKeyword::parse).ok();
+        Ok(BackgroundRepeat::Keywords(horizontal, vertical))
+    }
+}