Auto merge of #19903 - servo:derive-all-the-things, r=emilio

Derive more Parse implementations (fixes #19827)

Fixes #19827.

<!-- Reviewable:start -->
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19903)
<!-- Reviewable:end -->

components/style/font_face.rs

@@ -67,13 +67,17 @@ impl ToCss for UrlSource {
 /// A font-display value for a @font-face rule.
 /// The font-display descriptor determines how a font face is displayed based
 /// on whether and when it is downloaded and ready to use.
-define_css_keyword_enum!(FontDisplay:
+#[allow(missing_docs)]
-                         "auto" => Auto,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-                         "block" => Block,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-                         "swap" => Swap,
+#[derive(ToComputedValue, ToCss)]
-                         "fallback" => Fallback,
+pub enum FontDisplay {
-                         "optional" => Optional);
+    Auto,
-add_impls_for_keyword_enum!(FontDisplay);
+    Block,
+    Swap,
+    Fallback,
+    Optional,
+}
 
 /// A font-weight value for a @font-face rule.
 /// The font-weight CSS property specifies the weight or boldness of the font.

components/style/gecko/conversions.rs

@@ -707,9 +707,9 @@ pub mod basic_shape {
                 }
                 StyleBasicShapeType::Polygon => {
                     let fill_rule = if other.mFillRule == StyleFillRule::Evenodd {
-                        FillRule::EvenOdd
+                        FillRule::Evenodd
                     } else {
-                        FillRule::NonZero
+                        FillRule::Nonzero
                     };
                     let mut coords = Vec::with_capacity(other.mCoordinates.len() / 2);
                     for i in 0..(other.mCoordinates.len() / 2) {

components/style/gecko/values.rs

@@ -348,10 +348,10 @@ impl GeckoStyleCoordConvertible for ExtremumLength {
         use gecko_bindings::structs::{NS_STYLE_WIDTH_MAX_CONTENT, NS_STYLE_WIDTH_MIN_CONTENT};
         coord.set_value(CoordDataValue::Enumerated(
             match *self {
-                ExtremumLength::MaxContent => NS_STYLE_WIDTH_MAX_CONTENT,
+                ExtremumLength::MozMaxContent => NS_STYLE_WIDTH_MAX_CONTENT,
-                ExtremumLength::MinContent => NS_STYLE_WIDTH_MIN_CONTENT,
+                ExtremumLength::MozMinContent => NS_STYLE_WIDTH_MIN_CONTENT,
-                ExtremumLength::FitContent => NS_STYLE_WIDTH_FIT_CONTENT,
+                ExtremumLength::MozFitContent => NS_STYLE_WIDTH_FIT_CONTENT,
-                ExtremumLength::FillAvailable => NS_STYLE_WIDTH_AVAILABLE,
+                ExtremumLength::MozAvailable => NS_STYLE_WIDTH_AVAILABLE,
             }
         ))
     }
@@ -361,12 +361,12 @@ impl GeckoStyleCoordConvertible for ExtremumLength {
         use gecko_bindings::structs::{NS_STYLE_WIDTH_MAX_CONTENT, NS_STYLE_WIDTH_MIN_CONTENT};
         match coord.as_value() {
             CoordDataValue::Enumerated(NS_STYLE_WIDTH_MAX_CONTENT) =>
-                Some(ExtremumLength::MaxContent),
+                Some(ExtremumLength::MozMaxContent),
             CoordDataValue::Enumerated(NS_STYLE_WIDTH_MIN_CONTENT) =>
-                Some(ExtremumLength::MinContent),
+                Some(ExtremumLength::MozMinContent),
             CoordDataValue::Enumerated(NS_STYLE_WIDTH_FIT_CONTENT) =>
-                Some(ExtremumLength::FitContent),
+                Some(ExtremumLength::MozFitContent),
-            CoordDataValue::Enumerated(NS_STYLE_WIDTH_AVAILABLE) => Some(ExtremumLength::FillAvailable),
+            CoordDataValue::Enumerated(NS_STYLE_WIDTH_AVAILABLE) => Some(ExtremumLength::MozAvailable),
             _ => None,
         }
     }

components/style/lib.rs

@@ -25,8 +25,6 @@
 
 #![deny(missing_docs)]
 
-#![recursion_limit = "500"]  // For define_css_keyword_enum! in -moz-appearance
-
 extern crate app_units;
 extern crate arrayvec;
 extern crate atomic_refcell;
@@ -72,7 +70,6 @@ extern crate smallbitvec;
 extern crate smallvec;
 #[macro_use]
 extern crate style_derive;
-#[macro_use]
 extern crate style_traits;
 extern crate time;
 extern crate uluru;

components/style/macros.rs

@@ -65,67 +65,6 @@ macro_rules! try_match_ident_ignore_ascii_case {
     }}
 }
 
-macro_rules! define_numbered_css_keyword_enum {
-    ($name: ident: $( $css: expr => $variant: ident = $value: expr ),+,) => {
-        define_numbered_css_keyword_enum!($name: $( $css => $variant = $value ),+);
-    };
-    ($name: ident: $( $css: expr => $variant: ident = $value: expr ),+) => {
-        #[allow(non_camel_case_types, missing_docs)]
-        #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Ord, PartialEq, PartialOrd)]
-        #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-        pub enum $name {
-            $( $variant = $value ),+
-        }
-
-        impl $crate::parser::Parse for $name {
-            fn parse<'i, 't>(
-                _context: &$crate::parser::ParserContext,
-                input: &mut ::cssparser::Parser<'i, 't>,
-            ) -> Result<$name, ::style_traits::ParseError<'i>> {
-                try_match_ident_ignore_ascii_case! { input,
-                    $( $css => Ok($name::$variant), )+
-                }
-            }
-        }
-
-        impl ::style_traits::ToCss for $name {
-            fn to_css<W>(
-                &self,
-                dest: &mut ::style_traits::CssWriter<W>,
-            ) -> ::std::fmt::Result
-            where
-                W: ::std::fmt::Write,
-            {
-                match *self {
-                    $( $name::$variant => dest.write_str($css) ),+
-                }
-            }
-        }
-    }
-}
-
-/// A macro for implementing `ToComputedValue`, and `Parse` traits for
-/// the enums defined using `define_css_keyword_enum` macro.
-///
-/// NOTE: We should either move `Parse` trait to `style_traits`
-/// or `define_css_keyword_enum` macro to this crate, but that
-/// may involve significant cleanup in both the crates.
-macro_rules! add_impls_for_keyword_enum {
-    ($name:ident) => {
-        impl $crate::parser::Parse for $name {
-            #[inline]
-            fn parse<'i, 't>(
-                _context: &$crate::parser::ParserContext,
-                input: &mut ::cssparser::Parser<'i, 't>,
-            ) -> Result<Self, ::style_traits::ParseError<'i>> {
-                $name::parse(input)
-            }
-        }
-
-        trivial_to_computed_value!($name);
-    };
-}
-
 macro_rules! define_keyword_type {
     ($name: ident, $css: expr) => {
         #[allow(missing_docs)]

components/style/properties/gecko.mako.rs

@@ -62,6 +62,7 @@ use values::computed::{NonNegativeLength, ToComputedValue, Percentage};
 use values::computed::font::{FontSize, SingleFontFamily};
 use values::computed::effects::{BoxShadow, Filter, SimpleShadow};
 use values::computed::outline::OutlineStyle;
+use values::generics::transform::TransformStyle;
 use computed_values::border_style;
 
 pub mod style_structs {
@@ -3345,6 +3346,25 @@ fn static_assert() {
         self.copy_transition_property_from(other)
     }
 
+    // Hand-written because the Mako helpers transform `Preserve3d` into `PRESERVE3D`.
+    pub fn set_transform_style(&mut self, v: TransformStyle) {
+        self.gecko.mTransformStyle = match v {
+            TransformStyle::Flat => structs::NS_STYLE_TRANSFORM_STYLE_FLAT as u8,
+            TransformStyle::Preserve3d => structs::NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D as u8,
+        };
+    }
+
+    // Hand-written because the Mako helpers transform `Preserve3d` into `PRESERVE3D`.
+    pub fn clone_transform_style(&self) -> TransformStyle {
+        match self.gecko.mTransformStyle as u32 {
+            structs::NS_STYLE_TRANSFORM_STYLE_FLAT => TransformStyle::Flat,
+            structs::NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D => TransformStyle::Preserve3d,
+            _ => panic!("illegal transform style"),
+        }
+    }
+
+    ${impl_simple_copy('transform_style', 'mTransformStyle')}
+
     ${impl_transition_count('property', 'Property')}
 
     pub fn animations_equals(&self, other: &Self) -> bool {
@@ -5081,7 +5101,7 @@ fn static_assert() {
                             coord.0.to_gecko_style_coord(&mut shape.mCoordinates[2 * i]);
                             coord.1.to_gecko_style_coord(&mut shape.mCoordinates[2 * i + 1]);
                         }
-                        shape.mFillRule = if poly.fill == FillRule::EvenOdd {
+                        shape.mFillRule = if poly.fill == FillRule::Evenodd {
                             StyleFillRule::Evenodd
                         } else {
                             StyleFillRule::Nonzero

components/style/properties/helpers.mako.rs

@@ -424,22 +424,15 @@
         use properties::longhands::system_font::SystemFont;
 
         pub mod computed_value {
-            use cssparser::Parser;
+            #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-            use parser::{Parse, ParserContext};
+            #[derive(Clone, Copy, Debug, Eq, Hash, MallocSizeOf, Parse)]
-
+            #[derive(PartialEq, ToCss)]
-            use style_traits::ParseError;
+            pub enum T {
-            define_css_keyword_enum! { T:
             % for value in keyword.values_for(product):
-                    "${value}" => ${to_camel_case(value)},
+                ${to_camel_case(value)},
             % endfor
             }
 
-            impl Parse for T {
-                fn parse<'i, 't>(_: &ParserContext, input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
-                    T::parse(input)
-                }
-            }
-
             ${gecko_keyword_conversion(keyword, keyword.values_for(product), type="T", cast_to="i32")}
         }
 
@@ -604,25 +597,31 @@
 
     <%def name="inner_body(keyword, extra_specified=None, needs_conversion=False)">
         % if extra_specified or keyword.aliases_for(product):
-            define_css_keyword_enum! { SpecifiedValue:
+            #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-                values {
+            #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToCss)]
+            pub enum SpecifiedValue {
                 % for value in keyword.values_for(product) + (extra_specified or "").split():
-                        "${value}" => ${to_camel_case(value)},
+                <%
+                    aliases = []
+                    for alias, v in keyword.aliases_for(product).iteritems():
+                        if value == v:
+                            aliases.append(alias)
+                %>
+                % if aliases:
+                #[css(aliases = "${','.join(aliases)}")]
+                % endif
+                ${to_camel_case(value)},
                 % endfor
             }
-                aliases {
-                    % for alias, value in keyword.aliases_for(product).iteritems():
-                        "${alias}" => ${to_camel_case(value)},
-                    % endfor
-                }
-            }
         % else:
             pub use self::computed_value::T as SpecifiedValue;
         % endif
         pub mod computed_value {
-            define_css_keyword_enum! { T:
+            #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
+            #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToCss)]
+            pub enum T {
             % for value in data.longhands_by_name[name].keyword.values_for(product):
-                    "${value}" => ${to_camel_case(value)},
+                ${to_camel_case(value)},
             % endfor
             }
         }
@@ -639,13 +638,6 @@
                              -> Result<SpecifiedValue, ParseError<'i>> {
             SpecifiedValue::parse(input)
         }
-        impl Parse for SpecifiedValue {
-            #[inline]
-            fn parse<'i, 't>(_context: &ParserContext, input: &mut Parser<'i, 't>)
-                             -> Result<SpecifiedValue, ParseError<'i>> {
-                SpecifiedValue::parse(input)
-            }
-        }
 
         % if needs_conversion:
             <%

components/style/properties/longhand/border.mako.rs

@@ -32,13 +32,16 @@
         ignored_when_colors_disabled=True,
     )}
 
-    ${helpers.predefined_type("border-%s-style" % side_name, "BorderStyle",
+    ${helpers.predefined_type(
+        "border-%s-style" % side_name, "BorderStyle",
         "specified::BorderStyle::None",
         alias=maybe_moz_logical_alias(product, side, "-moz-border-%s-style"),
         spec=maybe_logical_spec(side, "style"),
         flags="APPLIES_TO_FIRST_LETTER",
         animation_value_type="discrete" if not is_logical else "none",
-                              logical=is_logical)}
+        logical=is_logical,
+        needs_context=False,
+    )}
 
     ${helpers.predefined_type("border-%s-width" % side_name,
                               "BorderSideWidth",
@@ -112,11 +115,14 @@ ${helpers.predefined_type("border-image-outset", "LengthOrNumberRect",
     pub struct SpecifiedValue(pub RepeatKeyword,
                               pub Option<RepeatKeyword>);
 
-    define_css_keyword_enum!(RepeatKeyword:
+    #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-                             "stretch" => Stretch,
+    #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToCss)]
-                             "repeat" => Repeat,
+    pub enum RepeatKeyword {
-                             "round" => Round,
+        Stretch,
-                             "space" => Space);
+        Repeat,
+        Round,
+        Space,
+    }
 
     #[inline]
     pub fn get_initial_value() -> computed_value::T {

components/style/properties/longhand/box.mako.rs

@@ -526,14 +526,16 @@ ${helpers.single_keyword("transform-box",
                          gecko_inexhaustive="True",
                          animation_value_type="discrete")}
 
-// `auto` keyword is not supported in gecko yet.
+${helpers.predefined_type(
-${helpers.single_keyword("transform-style",
+    "transform-style",
-                         "auto flat preserve-3d" if product == "servo" else
+    "TransformStyle",
-                         "flat preserve-3d",
+    "computed::TransformStyle::" + ("Auto" if product == "servo" else "Flat"),
-                         spec="https://drafts.csswg.org/css-transforms/#transform-style-property",
+    spec="https://drafts.csswg.org/css-transforms-2/#transform-style-property",
+    needs_context=False,
     extra_prefixes="moz webkit",
     flags="CREATES_STACKING_CONTEXT FIXPOS_CB",
-                         animation_value_type="discrete")}
+    animation_value_type="discrete",
+)}
 
 ${helpers.predefined_type("transform-origin",
                           "TransformOrigin",

components/style/properties/longhand/inherited_text.mako.rs

@@ -279,12 +279,14 @@ ${helpers.predefined_type(
         }
     }
 
-    define_css_keyword_enum!(ShapeKeyword:
+    #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToCss)]
-                             "dot" => Dot,
+    pub enum ShapeKeyword {
-                             "circle" => Circle,
+        Dot,
-                             "double-circle" => DoubleCircle,
+        Circle,
-                             "triangle" => Triangle,
+        DoubleCircle,
-                             "sesame" => Sesame);
+        Triangle,
+        Sesame,
+    }
 
     impl ShapeKeyword {
         pub fn char(&self, fill: bool) -> &str {
@@ -381,14 +383,19 @@ ${helpers.predefined_type(
 
 <%helpers:longhand name="text-emphasis-position" animation_value_type="discrete" products="gecko"
                    spec="https://drafts.csswg.org/css-text-decor/#propdef-text-emphasis-position">
-    define_css_keyword_enum!(HorizontalWritingModeValue:
+    #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-                             "over" => Over,
+    #[derive(ToComputedValue, ToCss)]
-                             "under" => Under);
+    pub enum HorizontalWritingModeValue {
-    add_impls_for_keyword_enum!(VerticalWritingModeValue);
+        Over,
-    define_css_keyword_enum!(VerticalWritingModeValue:
+        Under,
-                             "right" => Right,
+    }
-                             "left" => Left);
+
-    add_impls_for_keyword_enum!(HorizontalWritingModeValue);
+    #[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
+    #[derive(ToComputedValue, ToCss)]
+    pub enum VerticalWritingModeValue {
+        Right,
+        Left,
+    }
 
     #[derive(Clone, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToCss)]
     pub struct SpecifiedValue(pub HorizontalWritingModeValue, pub VerticalWritingModeValue);

components/style/properties/shorthand/border.mako.rs

@@ -9,9 +9,13 @@ ${helpers.four_sides_shorthand("border-color", "border-%s-color", "specified::Co
                                spec="https://drafts.csswg.org/css-backgrounds/#border-color",
                                allow_quirks=True)}
 
-${helpers.four_sides_shorthand("border-style", "border-%s-style",
+${helpers.four_sides_shorthand(
+    "border-style",
+    "border-%s-style",
     "specified::BorderStyle::parse",
-                               spec="https://drafts.csswg.org/css-backgrounds/#border-style")}
+    needs_context=False,
+    spec="https://drafts.csswg.org/css-backgrounds/#border-style",
+)}
 
 <%helpers:shorthand name="border-width" sub_properties="${
         ' '.join('border-%s-width' % side
@@ -63,7 +67,7 @@ pub fn parse_border<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>)
             }
         }
         if style.is_none() {
-            if let Ok(value) = input.try(|i| BorderStyle::parse(context, i)) {
+            if let Ok(value) = input.try(BorderStyle::parse) {
                 style = Some(value);
                 any = true;
                 continue

components/style/values/computed/mod.rs

@@ -73,7 +73,8 @@ pub use self::svg::MozContextProperties;
 pub use self::table::XSpan;
 pub use self::text::{InitialLetter, LetterSpacing, LineHeight, TextAlign, TextOverflow, WordSpacing};
 pub use self::time::Time;
-pub use self::transform::{TimingFunction, Transform, TransformOperation, TransformOrigin, Rotate, Translate, Scale};
+pub use self::transform::{Rotate, Scale, TimingFunction, Transform, TransformOperation};
+pub use self::transform::{TransformOrigin, TransformStyle, Translate};
 pub use self::ui::MozForceBrokenImageIcon;
 
 #[cfg(feature = "gecko")]

components/style/values/computed/transform.rs

@@ -18,6 +18,8 @@ use values::generics::transform::TimingFunction as GenericTimingFunction;
 use values::generics::transform::TransformOrigin as GenericTransformOrigin;
 use values::generics::transform::Translate as GenericTranslate;
 
+pub use values::generics::transform::TransformStyle;
+
 /// A single operation in a computed CSS `transform`
 pub type TransformOperation = GenericTransformOperation<
     Angle,

components/style/values/generics/basic_shape.rs

@@ -30,13 +30,16 @@ pub enum GeometryBox {
 pub type FloatAreaShape<BasicShape, Image> = ShapeSource<BasicShape, ShapeBox, Image>;
 
 // https://drafts.csswg.org/css-shapes-1/#typedef-shape-box
-define_css_keyword_enum!(ShapeBox:
+#[allow(missing_docs)]
-    "margin-box" => MarginBox,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "border-box" => BorderBox,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "padding-box" => PaddingBox,
+#[derive(ToComputedValue, ToCss)]
-    "content-box" => ContentBox
+pub enum ShapeBox {
-);
+    MarginBox,
-add_impls_for_keyword_enum!(ShapeBox);
+    BorderBox,
+    PaddingBox,
+    ContentBox,
+}
 
 /// A shape source, for some reference box.
 #[allow(missing_docs)]
@@ -117,11 +120,14 @@ pub struct Polygon<LengthOrPercentage> {
 // NOTE: Basic shapes spec says that these are the only two values, however
 // https://www.w3.org/TR/SVG/painting.html#FillRuleProperty
 // says that it can also be `inherit`
-define_css_keyword_enum!(FillRule:
+#[allow(missing_docs)]
-    "nonzero" => NonZero,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "evenodd" => EvenOdd
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-);
+#[derive(ToComputedValue, ToCss)]
-add_impls_for_keyword_enum!(FillRule);
+pub enum FillRule {
+    Nonzero,
+    Evenodd,
+}
 
 // FIXME(nox): Implement ComputeSquaredDistance for T types and stop
 // using PartialEq here, this will let us derive this impl.
@@ -239,5 +245,5 @@ impl<L: ToCss> ToCss for Polygon<L> {
 
 impl Default for FillRule {
     #[inline]
-    fn default() -> Self { FillRule::NonZero }
+    fn default() -> Self { FillRule::Nonzero }
 }

components/style/values/generics/grid.rs

@@ -140,12 +140,15 @@ impl Parse for GridLine<specified::Integer> {
     }
 }
 
-define_css_keyword_enum!{ TrackKeyword:
+#[allow(missing_docs)]
-    "auto" => Auto,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "max-content" => MaxContent,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "min-content" => MinContent
+#[derive(ToComputedValue, ToCss)]
+pub enum TrackKeyword {
+    Auto,
+    MaxContent,
+    MinContent,
 }
-add_impls_for_keyword_enum!(TrackKeyword);
 
 /// A track breadth for explicit grid track sizing. It's generic solely to
 /// avoid re-implementing it for the computed type.

components/style/values/generics/image.rs

@@ -97,15 +97,18 @@ pub enum Ellipse<LengthOrPercentage> {
 }
 
 /// <https://drafts.csswg.org/css-images/#typedef-extent-keyword>
-define_css_keyword_enum!(ShapeExtent:
+#[allow(missing_docs)]
-    "closest-side" => ClosestSide,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "farthest-side" => FarthestSide,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "closest-corner" => ClosestCorner,
+#[derive(ToComputedValue, ToCss)]
-    "farthest-corner" => FarthestCorner,
+pub enum ShapeExtent {
-    "contain" => Contain,
+    ClosestSide,
-    "cover" => Cover
+    FarthestSide,
-);
+    ClosestCorner,
-add_impls_for_keyword_enum!(ShapeExtent);
+    FarthestCorner,
+    Contain,
+    Cover,
+}
 
 /// A gradient item.
 /// <https://drafts.csswg.org/css-images-4/#color-stop-syntax>

components/style/values/generics/mod.rs

@@ -32,14 +32,17 @@ pub mod text;
 pub mod transform;
 
 // https://drafts.csswg.org/css-counter-styles/#typedef-symbols-type
-define_css_keyword_enum! { SymbolsType:
+#[allow(missing_docs)]
-    "cyclic" => Cyclic,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "numeric" => Numeric,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "alphabetic" => Alphabetic,
+#[derive(ToComputedValue, ToCss)]
-    "symbolic" => Symbolic,
+pub enum SymbolsType {
-    "fixed" => Fixed,
+    Cyclic,
+    Numeric,
+    Alphabetic,
+    Symbolic,
+    Fixed,
 }
-add_impls_for_keyword_enum!(SymbolsType);
 
 #[cfg(feature = "gecko")]
 impl SymbolsType {

components/style/values/generics/transform.rs

@@ -98,20 +98,26 @@ pub enum TimingFunction<Integer, Number> {
     Frames(Integer),
 }
 
-define_css_keyword_enum! { TimingKeyword:
+#[allow(missing_docs)]
-    "linear" => Linear,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "ease" => Ease,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "ease-in" => EaseIn,
+#[derive(ToComputedValue, ToCss)]
-    "ease-out" => EaseOut,
+pub enum TimingKeyword {
-    "ease-in-out" => EaseInOut,
+    Linear,
+    Ease,
+    EaseIn,
+    EaseOut,
+    EaseInOut,
 }
-add_impls_for_keyword_enum!(TimingKeyword);
 
-define_css_keyword_enum! { StepPosition:
+#[allow(missing_docs)]
-    "start" => Start,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "end" => End,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
+#[derive(ToComputedValue, ToCss)]
+pub enum StepPosition {
+    Start,
+    End,
 }
-add_impls_for_keyword_enum!(StepPosition);
 
 impl<H, V, D> TransformOrigin<H, V, D> {
     /// Returns a new transform origin.
@@ -714,3 +720,13 @@ pub enum Translate<LengthOrPercentage, Length> {
     /// '<length-percentage> <length-percentage> <length>'
     Translate3D(LengthOrPercentage, LengthOrPercentage, Length),
 }
+
+#[allow(missing_docs)]
+#[derive(Clone, Copy, Debug, MallocSizeOf, Parse, PartialEq, ToComputedValue, ToCss)]
+pub enum TransformStyle {
+    #[cfg(feature = "servo")]
+    Auto,
+    Flat,
+    #[css(keyword = "preserve-3d")]
+    Preserve3d,
+}

components/style/values/mod.rs

@@ -195,10 +195,14 @@ impl ToCss for KeyframesName {
     }
 }
 
-// A type for possible values for min- and max- flavors of width,
+/// A type for possible values for min- and max- flavors of width,
-// height, block-size, and inline-size.
+/// height, block-size, and inline-size.
-define_css_keyword_enum!(ExtremumLength:
+#[allow(missing_docs)]
-                         "-moz-max-content" => MaxContent,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-                         "-moz-min-content" => MinContent,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq, ToCss)]
-                         "-moz-fit-content" => FitContent,
+pub enum ExtremumLength {
-                         "-moz-available" => FillAvailable);
+    MozMaxContent,
+    MozMinContent,
+    MozFitContent,
+    MozAvailable,
+}

components/style/values/specified/box.rs

@@ -28,9 +28,9 @@ pub enum Display {
     Table, InlineTable, TableRowGroup, TableHeaderGroup,
     TableFooterGroup, TableRow, TableColumnGroup,
     TableColumn, TableCell, TableCaption, ListItem, None,
-    #[parse(aliases = "-webkit-flex")]
+    #[css(aliases = "-webkit-flex")]
     Flex,
-    #[parse(aliases = "-webkit-inline-flex")]
+    #[css(aliases = "-webkit-inline-flex")]
     InlineFlex,
     #[cfg(feature = "gecko")]
     Grid,
@@ -320,25 +320,34 @@ impl Parse for AnimationName {
     }
 }
 
-define_css_keyword_enum! { ScrollSnapType:
+#[allow(missing_docs)]
-    "none" => None,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "mandatory" => Mandatory,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "proximity" => Proximity,
+#[derive(ToComputedValue, ToCss)]
+pub enum ScrollSnapType {
+    None,
+    Mandatory,
+    Proximity,
 }
-add_impls_for_keyword_enum!(ScrollSnapType);
 
-define_css_keyword_enum! { OverscrollBehavior:
+#[allow(missing_docs)]
-    "auto" => Auto,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "contain" => Contain,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
-    "none" => None,
+#[derive(ToComputedValue, ToCss)]
+pub enum OverscrollBehavior {
+    Auto,
+    Contain,
+    None,
 }
-add_impls_for_keyword_enum!(OverscrollBehavior);
 
-define_css_keyword_enum! { OverflowClipBox:
+#[allow(missing_docs)]
-    "padding-box" => PaddingBox,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "content-box" => ContentBox,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Parse, PartialEq)]
+#[derive(ToComputedValue, ToCss)]
+pub enum OverflowClipBox {
+    PaddingBox,
+    ContentBox,
 }
-add_impls_for_keyword_enum!(OverflowClipBox);
 
 #[derive(Clone, Debug, MallocSizeOf, PartialEq, ToComputedValue, ToCss)]
 /// Provides a rendering hint to the user agent,

components/style/values/specified/color.rs

@@ -47,12 +47,13 @@ pub enum Color {
 
 #[cfg(feature = "gecko")]
 mod gecko {
-    define_css_keyword_enum! { SpecialColorKeyword:
+    #[derive(Clone, Copy, Debug, Eq, Hash, MallocSizeOf, Parse, PartialEq, ToCss)]
-        "-moz-default-color" => MozDefaultColor,
+    pub enum SpecialColorKeyword {
-        "-moz-default-background-color" => MozDefaultBackgroundColor,
+        MozDefaultColor,
-        "-moz-hyperlinktext" => MozHyperlinktext,
+        MozDefaultBackgroundColor,
-        "-moz-activehyperlinktext" => MozActiveHyperlinktext,
+        MozHyperlinktext,
-        "-moz-visitedhyperlinktext" => MozVisitedHyperlinktext,
+        MozActiveHyperlinktext,
+        MozVisitedHyperlinktext,
     }
 }
 

components/style/values/specified/mod.rs

@@ -69,7 +69,8 @@ pub use self::table::XSpan;
 pub use self::text::{InitialLetter, LetterSpacing, LineHeight, TextDecorationLine};
 pub use self::text::{TextAlign, TextAlignKeyword, TextOverflow, WordSpacing};
 pub use self::time::Time;
-pub use self::transform::{TimingFunction, Transform, TransformOrigin, Rotate, Translate, Scale};
+pub use self::transform::{Rotate, Scale, TimingFunction, Transform};
+pub use self::transform::{TransformOrigin, TransformStyle, Translate};
 pub use self::ui::MozForceBrokenImageIcon;
 pub use super::generics::grid::GridTemplateComponent as GenericGridTemplateComponent;
 
@@ -160,20 +161,23 @@ fn parse_number_with_clamping_mode<'i, 't>(
 // 17.6.2.1. Higher values override lower values.
 //
 // FIXME(emilio): Should move to border.rs
-define_numbered_css_keyword_enum! { BorderStyle:
+#[allow(missing_docs)]
-    "none" => None = -1,
+#[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-    "solid" => Solid = 6,
+#[derive(Clone, Copy, Debug, Eq, MallocSizeOf, Ord, Parse, PartialEq)]
-    "double" => Double = 7,
+#[derive(PartialOrd, ToCss)]
-    "dotted" => Dotted = 4,
+pub enum BorderStyle {
-    "dashed" => Dashed = 5,
+    None = -1,
-    "hidden" => Hidden = -2,
+    Solid = 6,
-    "groove" => Groove = 1,
+    Double = 7,
-    "ridge" => Ridge = 3,
+    Dotted = 4,
-    "inset" => Inset = 0,
+    Dashed = 5,
-    "outset" => Outset = 2,
+    Hidden = -2,
+    Groove = 1,
+    Ridge = 3,
+    Inset = 0,
+    Outset = 2,
 }
 
-
 impl BorderStyle {
     /// Whether this border style is either none or hidden.
     pub fn none_or_hidden(&self) -> bool {

components/style/values/specified/outline.rs

@@ -39,10 +39,10 @@ impl OutlineStyle {
 
 impl Parse for OutlineStyle {
     fn parse<'i, 't>(
-        context: &ParserContext,
+        _context: &ParserContext,
         input: &mut Parser<'i, 't>
     ) -> Result<OutlineStyle, ParseError<'i>> {
-        if let Ok(border_style) = input.try(|i| BorderStyle::parse(context, i)) {
+        if let Ok(border_style) = input.try(BorderStyle::parse) {
             if let BorderStyle::Hidden = border_style {
                 return Err(input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent("hidden".into())));
             }

components/style/values/specified/transform.rs

@@ -22,6 +22,8 @@ use values::specified::{self, Angle, Number, Length, Integer};
 use values::specified::{LengthOrNumber, LengthOrPercentage, LengthOrPercentageOrNumber};
 use values::specified::position::{Side, X, Y};
 
+pub use values::generics::transform::TransformStyle;
+
 /// A single operation in a specified CSS `transform`
 pub type TransformOperation = GenericTransformOperation<
     Angle,

components/style_derive/lib.rs

@@ -39,7 +39,7 @@ pub fn derive_to_animated_value(stream: TokenStream) -> TokenStream {
     to_animated_value::derive(input).to_string().parse().unwrap()
 }
 
-#[proc_macro_derive(Parse, attributes(parse))]
+#[proc_macro_derive(Parse, attributes(css))]
 pub fn derive_parse(stream: TokenStream) -> TokenStream {
     let input = syn::parse_derive_input(&stream.to_string()).unwrap();
     parse::derive(input).to_string().parse().unwrap()

components/style_derive/parse.rs

@@ -6,6 +6,7 @@ use cg;
 use quote::Tokens;
 use syn::DeriveInput;
 use synstructure;
+use to_css::CssVariantAttrs;
 
 pub fn derive(input: DeriveInput) -> Tokens {
     let name = &input.ident;
@@ -19,8 +20,10 @@ pub fn derive(input: DeriveInput) -> Tokens {
             "Parse is only supported for single-variant enums for now"
         );
 
-        let variant_attrs = cg::parse_variant_attrs::<ParseVariantAttrs>(variant);
+        let variant_attrs = cg::parse_variant_attrs::<CssVariantAttrs>(variant);
-        let identifier = cg::to_css_identifier(variant.ident.as_ref());
+        let identifier = cg::to_css_identifier(
+            &variant_attrs.keyword.as_ref().unwrap_or(&variant.ident).as_ref(),
+        );
         let ident = &variant.ident;
 
         match_body = quote! {
@@ -87,11 +90,3 @@ pub fn derive(input: DeriveInput) -> Tokens {
         #methods_impl
     }
 }
-
-#[darling(attributes(parse), default)]
-#[derive(Default, FromVariant)]
-struct ParseVariantAttrs {
-    /// The comma-separated list of aliases this variant should be aliased to at
-    /// parse time.
-    aliases: Option<String>,
-}

components/style_derive/to_css.rs

@@ -23,10 +23,19 @@ pub fn derive(input: DeriveInput) -> Tokens {
 
         if variant_attrs.dimension {
             assert_eq!(bindings.len(), 1);
-            assert!(variant_attrs.function.is_none(), "That makes no sense");
+            assert!(
+                variant_attrs.function.is_none() && variant_attrs.keyword.is_none(),
+                "That makes no sense"
+            );
         }
 
-        let mut expr = if !bindings.is_empty() {
+        let mut expr = if let Some(keyword) = variant_attrs.keyword {
+            assert!(bindings.is_empty());
+            let keyword = keyword.to_string();
+            quote! {
+                ::std::fmt::Write::write_str(dest, #keyword)
+            }
+        } else if !bindings.is_empty() {
             let mut expr = quote! {};
             if variant_attrs.iterable {
                 assert_eq!(bindings.len(), 1);
@@ -123,11 +132,13 @@ struct CssInputAttrs {
 
 #[darling(attributes(css), default)]
 #[derive(Default, FromVariant)]
-struct CssVariantAttrs {
+pub struct CssVariantAttrs {
-    function: Option<Function>,
+    pub function: Option<Function>,
-    iterable: bool,
+    pub iterable: bool,
-    comma: bool,
+    pub comma: bool,
-    dimension: bool,
+    pub dimension: bool,
+    pub keyword: Option<Ident>,
+    pub aliases: Option<String>,
 }
 
 #[darling(attributes(css), default)]
@@ -136,7 +147,7 @@ struct CssFieldAttrs {
     ignore_bound: bool,
 }
 
-struct Function {
+pub struct Function {
     name: Option<Ident>,
 }
 

components/style_traits/values.rs

@@ -384,67 +384,10 @@ impl_to_css_for_predefined_type!(::cssparser::UnicodeRange);
 
 #[macro_export]
 macro_rules! define_css_keyword_enum {
-    ($name: ident: values { $( $css: expr => $variant: ident),+, }
+    (pub enum $name:ident { $($variant:ident = $css:expr,)+ }) => {
-                   aliases { $( $alias: expr => $alias_variant: ident ),+, }) => {
+        #[allow(missing_docs)]
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ]
+        #[cfg_attr(feature = "servo", derive(Deserialize, Serialize))]
-                                                              [ $( $alias => $alias_variant ),+ ]);
+        #[derive(Clone, Copy, Debug, Eq, Hash, MallocSizeOf, PartialEq)]
-    };
-    ($name: ident: values { $( $css: expr => $variant: ident),+, }
-                   aliases { $( $alias: expr => $alias_variant: ident ),* }) => {
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ]
-                                                              [ $( $alias => $alias_variant ),* ]);
-    };
-    ($name: ident: values { $( $css: expr => $variant: ident),+ }
-                   aliases { $( $alias: expr => $alias_variant: ident ),+, }) => {
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ]
-                                                              [ $( $alias => $alias_variant ),+ ]);
-    };
-    ($name: ident: values { $( $css: expr => $variant: ident),+ }
-                   aliases { $( $alias: expr => $alias_variant: ident ),* }) => {
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ]
-                                                              [ $( $alias => $alias_variant ),* ]);
-    };
-    ($name: ident: $( $css: expr => $variant: ident ),+,) => {
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ] []);
-    };
-    ($name: ident: $( $css: expr => $variant: ident ),+) => {
-        __define_css_keyword_enum__add_optional_traits!($name [ $( $css => $variant ),+ ] []);
-    };
-}
-
-#[cfg(feature = "servo")]
-#[macro_export]
-macro_rules! __define_css_keyword_enum__add_optional_traits {
-    ($name: ident [ $( $css: expr => $variant: ident ),+ ]
-                  [ $( $alias: expr => $alias_variant: ident),* ]) => {
-        __define_css_keyword_enum__actual! {
-            $name [ Deserialize, Serialize, MallocSizeOf ]
-                  [ $( $css => $variant ),+ ]
-                  [ $( $alias => $alias_variant ),* ]
-        }
-    };
-}
-
-#[cfg(not(feature = "servo"))]
-#[macro_export]
-macro_rules! __define_css_keyword_enum__add_optional_traits {
-    ($name: ident [ $( $css: expr => $variant: ident ),+ ]
-                  [ $( $alias: expr => $alias_variant: ident),* ]) => {
-        __define_css_keyword_enum__actual! {
-            $name [ MallocSizeOf ]
-                  [ $( $css => $variant ),+ ]
-                  [ $( $alias => $alias_variant ),* ]
-        }
-    };
-}
-
-#[macro_export]
-macro_rules! __define_css_keyword_enum__actual {
-    ($name: ident [ $( $derived_trait: ident),* ]
-                  [ $( $css: expr => $variant: ident ),+ ]
-                  [ $( $alias: expr => $alias_variant: ident ),* ]) => {
-        #[allow(non_camel_case_types, missing_docs)]
-        #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq$(, $derived_trait )* )]
         pub enum $name {
             $($variant),+
         }
@@ -458,10 +401,14 @@ macro_rules! __define_css_keyword_enum__actual {
                 match *input.next()? {
                     Token::Ident(ref ident) => {
                         Self::from_ident(ident).map_err(|()| {
-                            location.new_unexpected_token_error(Token::Ident(ident.clone()))
+                            location.new_unexpected_token_error(
+                                Token::Ident(ident.clone()),
+                            )
                         })
                     }
-                    ref token => Err(location.new_unexpected_token_error(token.clone()))
+                    ref token => {
+                        Err(location.new_unexpected_token_error(token.clone()))
+                    }
                 }
             }
 
@@ -469,22 +416,25 @@ macro_rules! __define_css_keyword_enum__actual {
             pub fn from_ident(ident: &str) -> Result<$name, ()> {
                 match_ignore_ascii_case! { ident,
                     $($css => Ok($name::$variant),)+
-                                           $( $alias => Ok($name::$alias_variant), )*
                     _ => Err(())
                 }
             }
         }
 
         impl $crate::ToCss for $name {
-            fn to_css<W>(&self, dest: &mut $crate::CssWriter<W>) -> ::std::fmt::Result
+            fn to_css<W>(
-                where W: ::std::fmt::Write
+                &self,
+                dest: &mut $crate::CssWriter<W>,
+            ) -> ::std::fmt::Result
+            where
+                W: ::std::fmt::Write,
             {
                 match *self {
                     $( $name::$variant => ::std::fmt::Write::write_str(dest, $css) ),+
                 }
             }
         }
-    }
+    };
 }
 
 /// Helper types for the handling of specified values.

components/style_traits/viewport.rs

@@ -10,14 +10,20 @@ use euclid::TypedSize2D;
 #[allow(unused_imports)] use std::ascii::AsciiExt;
 use std::fmt::{self, Write};
 
-define_css_keyword_enum!(UserZoom:
+define_css_keyword_enum! {
-                         "zoom" => Zoom,
+    pub enum UserZoom {
-                         "fixed" => Fixed);
+        Zoom = "zoom",
+        Fixed = "fixed",
+    }
+}
 
-define_css_keyword_enum!(Orientation:
+define_css_keyword_enum! {
-                         "auto" => Auto,
+    pub enum Orientation {
-                         "portrait" => Portrait,
+        Auto = "auto",
-                         "landscape" => Landscape);
+        Portrait = "portrait",
+        Landscape = "landscape",
+    }
+}
 
 /// A set of viewport descriptors:
 ///

tests/unit/style/parsing/border.rs

@@ -168,16 +168,16 @@ fn border_image_outset_should_return_length_on_length_zero() {
 fn test_border_style() {
     use style::values::specified::BorderStyle;
 
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"none"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"none"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"hidden"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"hidden"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"solid"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"solid"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"double"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"double"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"dotted"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"dotted"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"dashed"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"dashed"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"groove"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"groove"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"ridge"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"ridge"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"inset"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"inset"#);
-    assert_roundtrip_with_context!(BorderStyle::parse, r#"outset"#);
+    assert_roundtrip_with_context!(<BorderStyle as Parse>::parse, r#"outset"#);
 }
 
 #[test]