Derive ToCss for some counter-style descriptors

components/style/counter_style/mod.rs

@@ -469,7 +469,7 @@ fn bound_to_css<W>(range: Option<i32>, dest: &mut W) -> fmt::Result where W: fmt
 }
 
 /// https://drafts.csswg.org/css-counter-styles/#counter-style-pad
-#[derive(Debug, Clone)]
+#[derive(Clone, Debug, ToCss)]
 pub struct Pad(pub u32, pub Symbol);
 
 impl Parse for Pad {
@@ -484,15 +484,8 @@ impl Parse for Pad {
     }
 }
 
-impl ToCss for Pad {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        write!(dest, "{} ", self.0)?;
-        self.1.to_css(dest)
-    }
-}
-
 /// https://drafts.csswg.org/css-counter-styles/#counter-style-fallback
-#[derive(Debug, Clone)]
+#[derive(Clone, Debug, ToCss)]
 pub struct Fallback(pub CustomIdent);
 
 impl Parse for Fallback {
@@ -501,12 +494,6 @@ impl Parse for Fallback {
     }
 }
 
-impl ToCss for Fallback {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        self.0.to_css(dest)
-    }
-}
-
 /// https://drafts.csswg.org/css-counter-styles/#descdef-counter-style-symbols
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Symbols(pub Vec<Symbol>);
@@ -542,7 +529,7 @@ impl ToCss for Symbols {
 }
 
 /// https://drafts.csswg.org/css-counter-styles/#descdef-counter-style-additive-symbols
-#[derive(Debug, Clone)]
+#[derive(Clone, Debug, ToCss)]
 pub struct AdditiveSymbols(pub Vec<AdditiveTuple>);
 
 impl Parse for AdditiveSymbols {
@@ -556,14 +543,8 @@ impl Parse for AdditiveSymbols {
     }
 }
 
-impl ToCss for AdditiveSymbols {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        self.0.to_css(dest)
-    }
-}
-
 /// <integer> && <symbol>
-#[derive(Debug, Clone)]
+#[derive(Clone, Debug, ToCss)]
 pub struct AdditiveTuple {
     /// <integer>
     pub weight: u32,
@@ -588,15 +569,8 @@ impl Parse for AdditiveTuple {
     }
 }
 
-impl ToCss for AdditiveTuple {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        write!(dest, "{} ", self.weight)?;
-        self.symbol.to_css(dest)
-    }
-}
-
 /// https://drafts.csswg.org/css-counter-styles/#counter-style-speak-as
-#[derive(Debug, Clone)]
+#[derive(Clone, Debug, ToCss)]
 pub enum SpeakAs {
     /// auto
     Auto,
@@ -639,15 +613,3 @@ impl Parse for SpeakAs {
         })
     }
 }
-
-impl ToCss for SpeakAs {
-    fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
-        match *self {
-            SpeakAs::Auto => dest.write_str("auto"),
-            SpeakAs::Bullets => dest.write_str("bullets"),
-            SpeakAs::Numbers => dest.write_str("numbers"),
-            SpeakAs::Words => dest.write_str("words"),
-            SpeakAs::Other(ref other) => other.to_css(dest),
-        }
-    }
-}