lightningcss/properties/

mod.rs

//! CSS property values.
//!
//! Each property provides parsing and serialization support using the [Parse](super::traits::Parse)
//! and [ToCss](super::traits::ToCss) traits. Properties are fully parsed as defined by the CSS spec,
//! and printed in their canonical form. For example, most CSS properties are case-insensitive, and
//! may be written in various orders, but when printed they are lower cased as appropriate and in a
//! standard order.
//!
//! CSS properties often also contain many implicit values that are automatically filled in during
//! parsing when omitted. These are also omitted when possible during serialization. Many properties
//! also implement the [Default](std::default::Default) trait, which returns the initial value for the property.
//!
//! Shorthand properties are represented as structs containing fields for each of the sub-properties.
//! If some of the sub-properties are not specified in the shorthand, their default values are filled in.
//!
//! The [Property](Property) enum contains the values of all properties, and can be used to parse property values by name.
//! The [PropertyId](PropertyId) enum represents only property names, and not values and is used to refer to known properties.
//!
//! # Example
//!
//! This example shows how the `background` shorthand property is parsed and serialized. The `parse_string`
//! function parses the background into a structure with all missing fields filled in with their default values.
//! When printed using the `to_css_string` function, the components are in their canonical order, and default
//! values are removed.
//!
//! ```
//! use smallvec::smallvec;
//! use lightningcss::{
//!   properties::{Property, PropertyId, background::*},
//!   values::{url::Url, image::Image, color::{CssColor, RGBA}, position::*, length::*},
//!   stylesheet::{ParserOptions, PrinterOptions},
//!   dependencies::Location,
//! };
//!
//! let background = Property::parse_string(
//!   PropertyId::from("background"),
//!   "url('img.png') repeat fixed 20px 10px / 50px 100px",
//!   ParserOptions::default()
//! ).unwrap();
//!
//! assert_eq!(
//!   background,
//!   Property::Background(smallvec![Background {
//!     image: Image::Url(Url {
//!       url: "img.png".into(),
//!       loc: Location { line: 1, column: 1 }
//!     }),
//!     color: CssColor::RGBA(RGBA {
//!       red: 0,
//!       green: 0,
//!       blue: 0,
//!       alpha: 0
//!     }),
//!     position: BackgroundPosition {
//!       x: HorizontalPosition::Length(LengthPercentage::px(20.0)),
//!       y: VerticalPosition::Length(LengthPercentage::px(10.0)),
//!     },
//!     repeat: BackgroundRepeat {
//!       x: BackgroundRepeatKeyword::Repeat,
//!       y: BackgroundRepeatKeyword::Repeat,
//!     },
//!     size: BackgroundSize::Explicit {
//!       width: LengthPercentageOrAuto::LengthPercentage(LengthPercentage::px(50.0)),
//!       height: LengthPercentageOrAuto::LengthPercentage(LengthPercentage::px(100.0)),
//!     },
//!     attachment: BackgroundAttachment::Fixed,
//!     origin: BackgroundOrigin::PaddingBox,
//!     clip: BackgroundClip::BorderBox,
//!   }])
//! );
//!
//! assert_eq!(
//!   background.to_css_string(false, PrinterOptions::default()).unwrap(),
//!   r#"background: url("img.png") 20px 10px / 50px 100px fixed"#
//! );
//! ```
//!
//! If you have a [cssparser::Parser](cssparser::Parser) already, you can also use the `parse` and `to_css`
//! methods instead, rather than parsing from a string.
//!
//! # Unparsed and custom properties
//!
//! Custom and unknown properties are represented by the [CustomProperty](custom::CustomProperty) struct, and the
//! `Property::Custom` variant. The value of these properties is not parsed, and is stored as a raw
//! [TokenList](custom::TokenList), with the name as a string.
//!
//! If a known property is unable to be parsed, e.g. it contains `var()` references, then it is represented by the
//! [UnparsedProperty](custom::UnparsedProperty) struct, and the `Property::Unparsed` variant. The value is stored
//! as a raw [TokenList](custom::TokenList), with a [PropertyId](PropertyId) as the name.

#![deny(missing_docs)]

pub mod align;
pub mod animation;
pub mod background;
pub mod border;
pub mod border_image;
pub mod border_radius;
pub mod box_shadow;
pub mod contain;
pub mod css_modules;
pub mod custom;
pub mod display;
pub mod effects;
pub mod flex;
pub mod font;
pub mod grid;
pub mod list;
pub(crate) mod margin_padding;
pub mod masking;
pub mod outline;
pub mod overflow;
pub mod position;
pub(crate) mod prefix_handler;
pub mod size;
pub mod svg;
pub mod text;
pub mod transform;
pub mod transition;
pub mod ui;

use crate::declaration::DeclarationBlock;
use crate::error::{ParserError, PrinterError};
use crate::logical::{LogicalGroup, PropertyCategory};
use crate::macros::enum_property;
use crate::parser::starts_with_ignore_ascii_case;
use crate::parser::ParserOptions;
use crate::prefixes::Feature;
use crate::printer::{Printer, PrinterOptions};
use crate::targets::Targets;
use crate::traits::{Parse, ParseWithOptions, Shorthand, ToCss};
use crate::values::number::{CSSInteger, CSSNumber};
use crate::values::string::CowArcStr;
use crate::values::{
  alpha::*, color::*, easing::EasingFunction, ident::DashedIdentReference, ident::NoneOrCustomIdentList, image::*,
  length::*, position::*, rect::*, shape::FillRule, size::Size2D, time::Time,
};
use crate::vendor_prefix::VendorPrefix;
#[cfg(feature = "visitor")]
use crate::visitor::Visit;
use align::*;
use animation::*;
use background::*;
use border::*;
use border_image::*;
use border_radius::*;
use box_shadow::*;
use contain::*;
use css_modules::*;
use cssparser::*;
use custom::*;
use display::*;
use effects::*;
use flex::*;
use font::*;
use grid::*;
use list::*;
use margin_padding::*;
use masking::*;
use outline::*;
use overflow::*;
use size::*;
use smallvec::{smallvec, SmallVec};
#[cfg(feature = "into_owned")]
use static_self::IntoOwned;
use svg::*;
use text::*;
use transform::*;
use transition::*;
use ui::*;

macro_rules! define_properties {
  (
    $(
      $(#[$meta: meta])*
      $name: literal: $property: ident($type: ty $(, $vp: ty)?) $( / $prefix: ident )* $( unprefixed: $unprefixed: literal )? $( options: $options: literal )? $( shorthand: $shorthand: literal )? $( [ logical_group: $logical_group: ident, category: $logical_category: ident ] )? $( if $condition: ident )?,
    )+
  ) => {
    /// A CSS property id.
    #[derive(Debug, Clone, PartialEq, Eq, Hash)]
    #[cfg_attr(feature = "visitor", derive(Visit))]
    #[cfg_attr(feature = "into_owned", derive(static_self::IntoOwned))]
    pub enum PropertyId<'i> {
      $(
        #[doc=concat!("The `", $name, "` property.")]
        $(#[$meta])*
        $property$(($vp))?,
      )+
      /// The `all` property.
      All,
      /// An unknown or custom property name.
      Custom(CustomPropertyName<'i>)
    }

    macro_rules! vp_name {
      ($x: ty, $n: ident) => {
        $n
      };
      ($x: ty, $n: expr) => {
        $n
      };
    }

    macro_rules! get_allowed_prefixes {
      ($v: literal) => {
        VendorPrefix::empty()
      };
      () => {
        VendorPrefix::None
      };
    }

    impl<'i> From<CowArcStr<'i>> for PropertyId<'i> {
      fn from(name: CowArcStr<'i>) -> PropertyId<'i> {
        let name_ref = name.as_ref();
        let (prefix, name_ref) = if starts_with_ignore_ascii_case(name_ref, "-webkit-") {
          (VendorPrefix::WebKit, &name_ref[8..])
        } else if starts_with_ignore_ascii_case(name_ref, "-moz-") {
          (VendorPrefix::Moz, &name_ref[5..])
        } else if starts_with_ignore_ascii_case(name_ref, "-o-") {
          (VendorPrefix::O, &name_ref[3..])
        } else if starts_with_ignore_ascii_case(name_ref, "-ms-") {
          (VendorPrefix::Ms, &name_ref[4..])
        } else {
          (VendorPrefix::None, name_ref)
        };

        Self::from_name_and_prefix(name_ref, prefix)
          .unwrap_or_else(|_| PropertyId::Custom(name.into()))
      }
    }

    impl<'i> From<&'i str> for PropertyId<'i> {
      #[inline]
      fn from(name: &'i str) -> PropertyId<'i> {
        PropertyId::from(CowArcStr::from(name))
      }
    }

    impl<'i> Parse<'i> for PropertyId<'i> {
      fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
        let name = input.expect_ident()?;
        Ok(CowArcStr::from(name).into())
      }
    }

    impl<'i> ToCss for PropertyId<'i> {
      fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError> where W: std::fmt::Write {
        let mut first = true;
        macro_rules! delim {
          () => {
            #[allow(unused_assignments)]
            if first {
              first = false;
            } else {
              dest.delim(',', false)?;
            }
          };
        }

        let name = self.name();
        for p in self.prefix().or_none() {
          delim!();
          p.to_css(dest)?;
          dest.write_str(name)?;
        }

        Ok(())
      }
    }

    impl<'i> PropertyId<'i> {
      fn from_name_and_prefix(name: &str, prefix: VendorPrefix) -> Result<Self, ()> {
        match_ignore_ascii_case! { name.as_ref(),
          $(
            $(#[$meta])*
            $name => {
              macro_rules! get_propertyid {
                ($v: ty) => {
                  PropertyId::$property(prefix)
                };
                () => {
                  PropertyId::$property
                };
              }

              let allowed_prefixes = get_allowed_prefixes!($($unprefixed)?) $(| VendorPrefix::$prefix)*;
              if allowed_prefixes.contains(prefix) {
                return Ok(get_propertyid!($($vp)?))
              }
            },
          )+
          "all" => return Ok(PropertyId::All),
          _ => {}
        }

        Err(())
      }

      /// Returns the vendor prefix for this property id.
      pub fn prefix(&self) -> VendorPrefix {
        use PropertyId::*;
        match self {
          $(
            $(#[$meta])*
            $property$((vp_name!($vp, prefix)))? => {
              $(
                macro_rules! return_prefix {
                  ($v: ty) => {
                    return *prefix;
                  };
                }

                return_prefix!($vp);
              )?
              #[allow(unreachable_code)]
              VendorPrefix::empty()
            },
          )+
          _ => VendorPrefix::empty()
        }
      }

      pub(crate) fn with_prefix(&self, prefix: VendorPrefix) -> PropertyId<'i> {
        use PropertyId::*;
        match self {
          $(
            $(#[$meta])*
            $property$((vp_name!($vp, _p)))? => {
              macro_rules! get_prefixed {
                ($v: ty) => {
                  PropertyId::$property(prefix)
                };
                () => {
                  PropertyId::$property
                }
              }

              get_prefixed!($($vp)?)
            },
          )+
          _ => self.clone()
        }
      }

      pub(crate) fn add_prefix(&mut self, prefix: VendorPrefix) {
        use PropertyId::*;
        match self {
          $(
            $(#[$meta])*
            $property$((vp_name!($vp, p)))? => {
              macro_rules! get_prefixed {
                ($v: ty) => {{
                  *p |= prefix;
                }};
                () => {{}};
              }

              get_prefixed!($($vp)?)
            },
          )+
          _ => {}
        }
      }

      pub(crate) fn set_prefixes_for_targets(&mut self, targets: Targets) {
        match self {
          $(
            $(#[$meta])*
            #[allow(unused_variables)]
            PropertyId::$property$((vp_name!($vp, prefix)))? => {
              macro_rules! get_prefixed {
                ($v: ty, $u: literal) => {};
                ($v: ty) => {{
                  *prefix = targets.prefixes(*prefix, Feature::$property);
                }};
                () => {};
              }

              get_prefixed!($($vp)? $(, $unprefixed)?);
            },
          )+
          _ => {}
        }
      }

      /// Returns the property name, without any vendor prefixes.
      pub fn name(&self) -> &str {
        use PropertyId::*;

        match self {
          $(
            $(#[$meta])*
            $property$((vp_name!($vp, _p)))? => $name,
          )+
          All => "all",
          Custom(name) => name.as_ref()
        }
      }

      /// Returns whether a property is a shorthand.
      pub fn is_shorthand(&self) -> bool {
        $(
          macro_rules! shorthand {
            ($s: literal) => {
              if let PropertyId::$property$((vp_name!($vp, _prefix)))? = self {
                return true
              }
            };
            () => {}
          }

          shorthand!($($shorthand)?);
        )+

        false
      }

      /// Returns a shorthand value for this property id from the given declaration block.
      pub(crate) fn shorthand_value<'a>(&self, decls: &DeclarationBlock<'a>) -> Option<(Property<'a>, bool)> {
        // Inline function to remap lifetime names.
        #[inline]
        fn shorthand_value<'a, 'i>(property_id: &PropertyId<'a>, decls: &DeclarationBlock<'i>) -> Option<(Property<'i>, bool)> {
          $(
            #[allow(unused_macros)]
            macro_rules! prefix {
              ($v: ty, $p: ident) => {
                *$p
              };
              ($p: ident) => {
                VendorPrefix::None
              };
            }

            macro_rules! shorthand {
              ($s: literal) => {
                if let PropertyId::$property$((vp_name!($vp, prefix)))? = &property_id {
                  if let Some((val, important)) = <$type>::from_longhands(decls, prefix!($($vp,)? prefix)) {
                    return Some((Property::$property(val $(, *vp_name!($vp, prefix))?), important))
                  }
                }
              };
              () => {}
            }

            shorthand!($($shorthand)?);
          )+

          None
        }

        shorthand_value(self, decls)
      }

      /// Returns a list of longhand property ids for a shorthand.
      pub fn longhands(&self) -> Option<Vec<PropertyId<'static>>> {
        macro_rules! prefix_default {
          ($x: ty, $p: ident) => {
            *$p
          };
          () => {
            VendorPrefix::None
          };
        }

        $(
          macro_rules! shorthand {
            ($s: literal) => {
              if let PropertyId::$property$((vp_name!($vp, prefix)))? = self {
                return Some(<$type>::longhands(prefix_default!($($vp, prefix)?)));
              }
            };
            () => {}
          }

          shorthand!($($shorthand)?);
        )+

        None
      }

      /// Returns the logical property group for this property.
      pub(crate) fn logical_group(&self) -> Option<LogicalGroup> {
        $(
          macro_rules! group {
            ($g: ident) => {
              if let PropertyId::$property$((vp_name!($vp, _prefix)))? = self {
                return Some(LogicalGroup::$g)
              }
            };
            () => {}
          }

          group!($($logical_group)?);
        )+

        None
      }

      /// Returns whether the property is logical or physical.
      pub(crate) fn category(&self) -> Option<PropertyCategory> {
        $(
          macro_rules! category {
            ($c: ident) => {
              if let PropertyId::$property$((vp_name!($vp, _prefix)))? = self {
                return Some(PropertyCategory::$c)
              }
            };
            () => {}
          }

          category!($($logical_category)?);
        )+

        None
      }
    }

    #[cfg(feature = "serde")]
    #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
    impl<'i> serde::Serialize for PropertyId<'i> {
      fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
      where
        S: serde::Serializer,
      {
        use serde::ser::SerializeStruct;

        let name = self.name();
        let prefix = self.prefix();

        if prefix.is_empty() {
          let mut s = serializer.serialize_struct("PropertyId", 1)?;
          s.serialize_field("property", name)?;
          s.end()
        } else {
          let mut s = serializer.serialize_struct("PropertyId", 2)?;
          s.serialize_field("property", name)?;
          s.serialize_field("vendor_prefix", &prefix)?;
          s.end()
        }
      }
    }

    #[cfg(feature = "serde")]
    #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
    impl<'i, 'de: 'i> serde::Deserialize<'de> for PropertyId<'i> {
      fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
      where
        D: serde::Deserializer<'de>,
      {
        #[derive(serde::Deserialize)]
        #[serde(field_identifier, rename_all = "snake_case")]
        enum Field {
          Property,
          VendorPrefix
        }

        struct PropertyIdVisitor;
        impl<'de> serde::de::Visitor<'de> for PropertyIdVisitor {
          type Value = PropertyId<'de>;

          fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
            formatter.write_str("a PropertyId")
          }

          fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
          where
            A: serde::de::MapAccess<'de>,
          {
            let mut property: Option<CowArcStr> = None;
            let mut vendor_prefix = None;
            while let Some(key) = map.next_key()? {
              match key {
                Field::Property => {
                  property = Some(map.next_value()?);
                }
                Field::VendorPrefix => {
                  vendor_prefix = Some(map.next_value()?);
                }
              }
            }

            let property = property.ok_or_else(|| serde::de::Error::missing_field("property"))?;
            let vendor_prefix = vendor_prefix.unwrap_or(VendorPrefix::None);
            let property_id = PropertyId::from_name_and_prefix(property.as_ref(), vendor_prefix)
              .unwrap_or_else(|_| PropertyId::Custom(property.into()));
            Ok(property_id)
          }
        }

        deserializer.deserialize_any(PropertyIdVisitor)
      }
    }

    #[cfg(feature = "jsonschema")]
    #[cfg_attr(docsrs, doc(cfg(feature = "jsonschema")))]
    impl<'i> schemars::JsonSchema for PropertyId<'i> {
      fn is_referenceable() -> bool {
        true
      }

      fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
        macro_rules! property {
          ($n: literal) => {
            fn property(_: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
              schemars::schema::Schema::Object(schemars::schema::SchemaObject {
                instance_type: Some(schemars::schema::InstanceType::String.into()),
                enum_values: Some(vec![$n.into()]),
                ..Default::default()
              })
            }
          }
        }

        schemars::schema::Schema::Object(schemars::schema::SchemaObject {
          subschemas: Some(Box::new(schemars::schema::SubschemaValidation {
            one_of: Some(vec![
              $(
                {
                  property!($name);

                  macro_rules! with_prefix {
                    ($v: ty) => {{
                      #[derive(schemars::JsonSchema)]
                      struct T<'i> {
                        #[schemars(rename = "property", schema_with = "property")]
                        _property: &'i u8,
                        #[schemars(rename = "vendorPrefix")]
                        _vendor_prefix: VendorPrefix,
                      }

                      T::json_schema(gen)
                    }};
                    () => {{
                      #[derive(schemars::JsonSchema)]
                      struct T<'i> {
                        #[schemars(rename = "property", schema_with = "property")]
                        _property: &'i u8,
                      }

                      T::json_schema(gen)
                    }};
                  }

                  with_prefix!($($vp)?)
                },
              )+
              {
                property!("all");

                #[derive(schemars::JsonSchema)]
                struct T<'i> {
                  #[schemars(rename = "property", schema_with = "property")]
                  _property: &'i u8,
                }

                T::json_schema(gen)
              },
              {
                #[derive(schemars::JsonSchema)]
                struct T {
                  #[schemars(rename = "property")]
                  _property: String,
                }

                T::json_schema(gen)
              }
            ]),
            ..Default::default()
          })),
          ..Default::default()
        })
      }

      fn schema_name() -> String {
        "PropertyId".into()
      }
    }

    /// A CSS property.
    #[derive(Debug, Clone, PartialEq)]
    #[cfg_attr(feature = "visitor", derive(Visit), visit(visit_property, PROPERTIES))]
    #[cfg_attr(feature = "into_owned", derive(static_self::IntoOwned))]
    pub enum Property<'i> {
      $(
        #[doc=concat!("The `", $name, "` property.")]
        $(#[$meta])*
        $property($type, $($vp)?),
      )+
      /// The [all](https://drafts.csswg.org/css-cascade-5/#all-shorthand) shorthand property.
      All(CSSWideKeyword),
      /// An unparsed property.
      Unparsed(UnparsedProperty<'i>),
      /// A custom or unknown property.
      Custom(CustomProperty<'i>),
    }

    impl<'i> Property<'i> {
      /// Parses a CSS property by name.
      pub fn parse<'t>(property_id: PropertyId<'i>, input: &mut Parser<'i, 't>, options: &ParserOptions<'_, 'i>) -> Result<Property<'i>, ParseError<'i, ParserError<'i>>> {
        let state = input.state();

        match property_id {
          $(
            $(#[$meta])*
            PropertyId::$property$((vp_name!($vp, prefix)))? $(if options.$condition.is_some())? => {
              if let Ok(c) = <$type>::parse_with_options(input, options) {
                if input.expect_exhausted().is_ok() {
                  return Ok(Property::$property(c $(, vp_name!($vp, prefix))?))
                }
              }
            },
          )+
          PropertyId::All => return Ok(Property::All(CSSWideKeyword::parse(input)?)),
          PropertyId::Custom(name) => return Ok(Property::Custom(CustomProperty::parse(name, input, options)?)),
          _ => {}
        };

        // If a value was unable to be parsed, treat as an unparsed property.
        // This is different from a custom property, handled below, in that the property name is known
        // and stored as an enum rather than a string. This lets property handlers more easily deal with it.
        // Ideally we'd only do this if var() or env() references were seen, but err on the safe side for now.
        input.reset(&state);
        return Ok(Property::Unparsed(UnparsedProperty::parse(property_id, input, options)?))
      }

      /// Returns the property id for this property.
      pub fn property_id(&self) -> PropertyId<'i> {
        use Property::*;

        match self {
          $(
            $(#[$meta])*
            $property(_, $(vp_name!($vp, p))?) => PropertyId::$property$((*vp_name!($vp, p)))?,
          )+
          All(_) => PropertyId::All,
          Unparsed(unparsed) => unparsed.property_id.clone(),
          Custom(custom) => PropertyId::Custom(custom.name.clone())
        }
      }

      /// Parses a CSS property from a string.
      pub fn parse_string(property_id: PropertyId<'i>, input: &'i str, options: ParserOptions<'_, 'i>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
        let mut input = ParserInput::new(input);
        let mut parser = Parser::new(&mut input);
        Self::parse(property_id, &mut parser, &options)
      }

      /// Sets the vendor prefixes for this property.
      ///
      /// If the property doesn't support vendor prefixes, this function does nothing.
      /// If vendor prefixes are set which do not exist for the property, they are ignored
      /// and only the valid prefixes are set.
      pub fn set_prefix(&mut self, prefix: VendorPrefix) {
        use Property::*;
        match self {
          $(
            $(#[$meta])*
            $property(_, $(vp_name!($vp, p))?) => {
              macro_rules! set {
                ($v: ty) => {
                  *p = (prefix & (get_allowed_prefixes!($($unprefixed)?) $(| VendorPrefix::$prefix)*)).or(*p);
                };
                () => {};
              }

              set!($($vp)?);
            },
          )+
          _ => {}
        }
      }

      /// Serializes the value of a CSS property without its name or `!important` flag.
      pub fn value_to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError> where W: std::fmt::Write {
        use Property::*;

        match self {
          $(
            $(#[$meta])*
            $property(val, $(vp_name!($vp, _p))?) => {
              val.to_css(dest)
            }
          )+
          All(keyword) => keyword.to_css(dest),
          Unparsed(unparsed) => {
            unparsed.value.to_css(dest, false)
          }
          Custom(custom) => {
            custom.value.to_css(dest, matches!(custom.name, CustomPropertyName::Custom(..)))
          }
        }
      }

      /// Serializes the value of a CSS property as a string.
      pub fn value_to_css_string(&self, options: PrinterOptions) -> Result<String, PrinterError> {
        let mut s = String::new();
        let mut printer = Printer::new(&mut s, options);
        self.value_to_css(&mut printer)?;
        Ok(s)
      }

      /// Serializes the CSS property, with an optional `!important` flag.
      pub fn to_css<W>(&self, dest: &mut Printer<W>, important: bool) -> Result<(), PrinterError> where W: std::fmt::Write {
        use Property::*;

        let mut first = true;
        macro_rules! start {
          () => {
            #[allow(unused_assignments)]
            if first {
              first = false;
            } else {
              dest.write_char(';')?;
              dest.newline()?;
            }
          };
        }

        macro_rules! write_important {
          () => {
            if important {
              dest.whitespace()?;
              dest.write_str("!important")?;
            }
          }
        }

        let (name, prefix) = match self {
          $(
            $(#[$meta])*
            $property(_, $(vp_name!($vp, prefix))?) => {
              macro_rules! get_prefix {
                ($v: ty) => {
                  *prefix
                };
                () => {
                  VendorPrefix::None
                };
              }

              ($name, get_prefix!($($vp)?))
            },
          )+
          All(_) => ("all", VendorPrefix::None),
          Unparsed(unparsed) => {
            let mut prefix = unparsed.property_id.prefix();
            if prefix.is_empty() {
              prefix = VendorPrefix::None;
            }
            (unparsed.property_id.name(), prefix)
          },
          Custom(custom) => {
            custom.name.to_css(dest)?;
            dest.delim(':', false)?;
            self.value_to_css(dest)?;
            write_important!();
            return Ok(())
          }
        };
        for p in prefix {
          start!();
          p.to_css(dest)?;
          dest.write_str(name)?;
          dest.delim(':', false)?;
          self.value_to_css(dest)?;
          write_important!();
        }
        Ok(())
      }

      /// Serializes the CSS property to a string, with an optional `!important` flag.
      pub fn to_css_string(&self, important: bool, options: PrinterOptions) -> Result<String, PrinterError> {
        let mut s = String::new();
        let mut printer = Printer::new(&mut s, options);
        self.to_css(&mut printer, important)?;
        Ok(s)
      }

      /// Returns the given longhand property for a shorthand.
      pub fn longhand(&self, property_id: &PropertyId) -> Option<Property<'i>> {
        $(
          macro_rules! shorthand {
            ($s: literal) => {
              if let Property::$property(val $(, vp_name!($vp, prefix))?) = self {
                $(
                  if *vp_name!($vp, prefix) != property_id.prefix() {
                    return None
                  }
                )?
                return val.longhand(property_id)
              }
            };
            () => {}
          }

          shorthand!($($shorthand)?);
        )+

        None
      }

      /// Updates this shorthand from a longhand property.
      pub fn set_longhand(&mut self, property: &Property<'i>) -> Result<(), ()> {
        $(
          macro_rules! shorthand {
            ($s: literal) => {
              if let Property::$property(val $(, vp_name!($vp, prefix))?) = self {
                $(
                  if *vp_name!($vp, prefix) != property.property_id().prefix() {
                    return Err(())
                  }
                )?
                return val.set_longhand(property)
              }
            };
            () => {}
          }

          shorthand!($($shorthand)?);
        )+
        Err(())
      }
    }

    #[cfg(feature = "serde")]
    #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
    impl<'i> serde::Serialize for Property<'i> {
      fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
      where
        S: serde::Serializer,
      {
        use serde::ser::SerializeStruct;
        use Property::*;

        match self {
          Unparsed(unparsed) => {
            let mut s = serializer.serialize_struct("Property", 2)?;
            s.serialize_field("property", "unparsed")?;
            s.serialize_field("value", unparsed)?;
            return s.end()
          }
          Custom(unparsed) => {
            let mut s = serializer.serialize_struct("Property", 2)?;
            s.serialize_field("property", "custom")?;
            s.serialize_field("value", unparsed)?;
            return s.end()
          }
          _ => {}
        }

        let id = self.property_id();
        let name = id.name();
        let prefix = id.prefix();

        let mut s = if prefix.is_empty() {
          let mut s = serializer.serialize_struct("Property", 2)?;
          s.serialize_field("property", name)?;
          s
        } else {
          let mut s = serializer.serialize_struct("Property", 3)?;
          s.serialize_field("property", name)?;
          s.serialize_field("vendorPrefix", &prefix)?;
          s
        };

        match self {
          $(
            $(#[$meta])*
            $property(value, $(vp_name!($vp, _p))?) => {
              s.serialize_field("value", value)?;
            }
          )+
          All(value) => {
            s.serialize_field("value", value)?;
          }
          Unparsed(_) | Custom(_) => unreachable!()
        }

        s.end()
      }
    }

    #[cfg(feature = "serde")]
    #[cfg_attr(docsrs, doc(cfg(feature = "serde")))]
    impl<'i, 'de: 'i> serde::Deserialize<'de> for Property<'i> {
      fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
      where
        D: serde::Deserializer<'de>,
      {
        enum ContentOrRaw<'de> {
          Content(serde_content::Value<'de>),
          Raw(CowArcStr<'de>)
        }

        struct PartialProperty<'de> {
          property_id: PropertyId<'de>,
          value: ContentOrRaw<'de>,
        }

        #[derive(serde::Deserialize)]
        #[serde(field_identifier, rename_all = "camelCase")]
        enum Field {
          Property,
          VendorPrefix,
          Value,
          Raw
        }

        struct PropertyIdVisitor;
        impl<'de> serde::de::Visitor<'de> for PropertyIdVisitor {
          type Value = PartialProperty<'de>;

          fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
            formatter.write_str("a Property")
          }

          fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
          where
            A: serde::de::MapAccess<'de>,
          {
            let mut property: Option<CowArcStr> = None;
            let mut vendor_prefix = None;
            let mut value: Option<ContentOrRaw<'de>> = None;
            while let Some(key) = map.next_key()? {
              match key {
                Field::Property => {
                  property = Some(map.next_value()?);
                }
                Field::VendorPrefix => {
                  vendor_prefix = Some(map.next_value()?);
                }
                Field::Value => {
                  value = Some(ContentOrRaw::Content(map.next_value()?));
                }
                Field::Raw => {
                  value = Some(ContentOrRaw::Raw(map.next_value()?));
                }
              }
            }

            let property = property.ok_or_else(|| serde::de::Error::missing_field("property"))?;
            let vendor_prefix = vendor_prefix.unwrap_or(VendorPrefix::None);
            let value = value.ok_or_else(|| serde::de::Error::missing_field("value"))?;
            let property_id = PropertyId::from_name_and_prefix(property.as_ref(), vendor_prefix)
              .unwrap_or_else(|_| PropertyId::from(property));
            Ok(PartialProperty {
              property_id,
              value,
            })
          }
        }

        let partial = deserializer.deserialize_any(PropertyIdVisitor)?;

        let content = match partial.value {
          ContentOrRaw::Raw(raw) => {
            let res = Property::parse_string(partial.property_id, raw.as_ref(), ParserOptions::default())
              .map_err(|_| serde::de::Error::custom("Could not parse value"))?;
            return Ok(res.into_owned())
          }
          ContentOrRaw::Content(content) => content
        };

        let deserializer = serde_content::Deserializer::new(content).coerce_numbers();
        match partial.property_id {
          $(
            $(#[$meta])*
            PropertyId::$property$((vp_name!($vp, prefix)))? => {
              let value = <$type>::deserialize(deserializer).map_err(|e| serde::de::Error::custom(e.to_string()))?;
              Ok(Property::$property(value $(, vp_name!($vp, prefix))?))
            },
          )+
          PropertyId::Custom(name) => {
            if name.as_ref() == "unparsed" {
              let value = UnparsedProperty::deserialize(deserializer).map_err(|e| serde::de::Error::custom(e.to_string()))?;
              Ok(Property::Unparsed(value))
            } else {
              let value = CustomProperty::deserialize(deserializer).map_err(|e| serde::de::Error::custom(e.to_string()))?;
              Ok(Property::Custom(value))
            }
          }
          PropertyId::All => {
            let value = CSSWideKeyword::deserialize(deserializer).map_err(|e| serde::de::Error::custom(e.to_string()))?;
            Ok(Property::All(value))
          }
        }
      }
    }

    #[cfg(feature = "jsonschema")]
    #[cfg_attr(docsrs, doc(cfg(feature = "jsonschema")))]
    impl<'i> schemars::JsonSchema for Property<'i> {
      fn is_referenceable() -> bool {
        true
      }

      fn json_schema(gen: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
        macro_rules! property {
          ($n: literal) => {
            fn property(_: &mut schemars::gen::SchemaGenerator) -> schemars::schema::Schema {
              schemars::schema::Schema::Object(schemars::schema::SchemaObject {
                instance_type: Some(schemars::schema::InstanceType::String.into()),
                enum_values: Some(vec![$n.into()]),
                ..Default::default()
              })
            }
          }
        }

        schemars::schema::Schema::Object(schemars::schema::SchemaObject {
          subschemas: Some(Box::new(schemars::schema::SubschemaValidation {
            one_of: Some(vec![
              $(
                {
                  property!($name);

                  macro_rules! with_prefix {
                    ($v: ty) => {{
                      #[derive(schemars::JsonSchema)]
                      struct T<'i> {
                        #[schemars(rename = "property", schema_with = "property")]
                        _property: &'i u8,
                        #[schemars(rename = "vendorPrefix")]
                        _vendor_prefix: VendorPrefix,
                        #[schemars(rename = "value")]
                        _value: $type,
                      }

                      T::json_schema(gen)
                    }};
                    () => {{
                      #[derive(schemars::JsonSchema)]
                      struct T<'i> {
                        #[schemars(rename = "property", schema_with = "property")]
                        _property: &'i u8,
                        #[schemars(rename = "value")]
                        _value: $type,
                      }

                      T::json_schema(gen)
                    }};
                  }

                  with_prefix!($($vp)?)
                },
              )+
              {
                property!("all");
                #[derive(schemars::JsonSchema)]
                struct T {
                  #[schemars(rename = "property", schema_with = "property")]
                  _property: u8,
                  #[schemars(rename = "value")]
                  _value: CSSWideKeyword
                }
                T::json_schema(gen)
              },
              {
                property!("unparsed");

                #[derive(schemars::JsonSchema)]
                struct T<'i> {
                  #[schemars(rename = "property", schema_with = "property")]
                  _property: &'i u8,
                  #[schemars(rename = "value")]
                  _value: UnparsedProperty<'i>,
                }

                T::json_schema(gen)
              },
              {
                property!("custom");

                #[derive(schemars::JsonSchema)]
                struct T<'i> {
                  #[schemars(rename = "property", schema_with = "property")]
                  _property: &'i u8,
                  #[schemars(rename = "value")]
                  _value: CustomProperty<'i>,
                }

                T::json_schema(gen)
              }
            ]),
            ..Default::default()
          })),
          ..Default::default()
        })
      }

      fn schema_name() -> String {
        "Declaration".into()
      }
    }
  };
}

define_properties! {
  "background-color": BackgroundColor(CssColor),
  "background-image": BackgroundImage(SmallVec<[Image<'i>; 1]>),
  "background-position-x": BackgroundPositionX(SmallVec<[HorizontalPosition; 1]>),
  "background-position-y": BackgroundPositionY(SmallVec<[VerticalPosition; 1]>),
  "background-position": BackgroundPosition(SmallVec<[BackgroundPosition; 1]>) shorthand: true,
  "background-size": BackgroundSize(SmallVec<[BackgroundSize; 1]>),
  "background-repeat": BackgroundRepeat(SmallVec<[BackgroundRepeat; 1]>),
  "background-attachment": BackgroundAttachment(SmallVec<[BackgroundAttachment; 1]>),
  "background-clip": BackgroundClip(SmallVec<[BackgroundClip; 1]>, VendorPrefix) / WebKit / Moz,
  "background-origin": BackgroundOrigin(SmallVec<[BackgroundOrigin; 1]>),
  "background": Background(SmallVec<[Background<'i>; 1]>) shorthand: true,

  "box-shadow": BoxShadow(SmallVec<[BoxShadow; 1]>, VendorPrefix) / WebKit / Moz,
  "opacity": Opacity(AlphaValue),
  "color": Color(CssColor),
  "display": Display(Display),
  "visibility": Visibility(Visibility),

  "width": Width(Size) [logical_group: Size, category: Physical],
  "height": Height(Size) [logical_group: Size, category: Physical],
  "min-width": MinWidth(Size) [logical_group: MinSize, category: Physical],
  "min-height": MinHeight(Size) [logical_group: MinSize, category: Physical],
  "max-width": MaxWidth(MaxSize) [logical_group: MaxSize, category: Physical],
  "max-height": MaxHeight(MaxSize) [logical_group: MaxSize, category: Physical],
  "block-size": BlockSize(Size) [logical_group: Size, category: Logical],
  "inline-size": InlineSize(Size) [logical_group: Size, category: Logical],
  "min-block-size": MinBlockSize(Size) [logical_group: MinSize, category: Logical],
  "min-inline-size": MinInlineSize(Size) [logical_group: MinSize, category: Logical],
  "max-block-size": MaxBlockSize(MaxSize) [logical_group: MaxSize, category: Logical],
  "max-inline-size": MaxInlineSize(MaxSize) [logical_group: MaxSize, category: Logical],
  "box-sizing": BoxSizing(BoxSizing, VendorPrefix) / WebKit / Moz,
  "aspect-ratio": AspectRatio(AspectRatio),

  "overflow": Overflow(Overflow) shorthand: true,
  "overflow-x": OverflowX(OverflowKeyword),
  "overflow-y": OverflowY(OverflowKeyword),
  "text-overflow": TextOverflow(TextOverflow, VendorPrefix) / O,

  // https://www.w3.org/TR/2020/WD-css-position-3-20200519
  "position": Position(position::Position),
  "top": Top(LengthPercentageOrAuto) [logical_group: Inset, category: Physical],
  "bottom": Bottom(LengthPercentageOrAuto) [logical_group: Inset, category: Physical],
  "left": Left(LengthPercentageOrAuto) [logical_group: Inset, category: Physical],
  "right": Right(LengthPercentageOrAuto) [logical_group: Inset, category: Physical],
  "inset-block-start": InsetBlockStart(LengthPercentageOrAuto) [logical_group: Inset, category: Logical],
  "inset-block-end": InsetBlockEnd(LengthPercentageOrAuto) [logical_group: Inset, category: Logical],
  "inset-inline-start": InsetInlineStart(LengthPercentageOrAuto) [logical_group: Inset, category: Logical],
  "inset-inline-end": InsetInlineEnd(LengthPercentageOrAuto) [logical_group: Inset, category: Logical],
  "inset-block": InsetBlock(InsetBlock) shorthand: true,
  "inset-inline": InsetInline(InsetInline) shorthand: true,
  "inset": Inset(Inset) shorthand: true,

  "border-spacing": BorderSpacing(Size2D<Length>),

  "border-top-color": BorderTopColor(CssColor) [logical_group: BorderColor, category: Physical],
  "border-bottom-color": BorderBottomColor(CssColor) [logical_group: BorderColor, category: Physical],
  "border-left-color": BorderLeftColor(CssColor) [logical_group: BorderColor, category: Physical],
  "border-right-color": BorderRightColor(CssColor) [logical_group: BorderColor, category: Physical],
  "border-block-start-color": BorderBlockStartColor(CssColor) [logical_group: BorderColor, category: Logical],
  "border-block-end-color": BorderBlockEndColor(CssColor) [logical_group: BorderColor, category: Logical],
  "border-inline-start-color": BorderInlineStartColor(CssColor) [logical_group: BorderColor, category: Logical],
  "border-inline-end-color": BorderInlineEndColor(CssColor) [logical_group: BorderColor, category: Logical],

  "border-top-style": BorderTopStyle(LineStyle) [logical_group: BorderStyle, category: Physical],
  "border-bottom-style": BorderBottomStyle(LineStyle) [logical_group: BorderStyle, category: Physical],
  "border-left-style": BorderLeftStyle(LineStyle) [logical_group: BorderStyle, category: Physical],
  "border-right-style": BorderRightStyle(LineStyle) [logical_group: BorderStyle, category: Physical],
  "border-block-start-style": BorderBlockStartStyle(LineStyle) [logical_group: BorderStyle, category: Logical],
  "border-block-end-style": BorderBlockEndStyle(LineStyle) [logical_group: BorderStyle, category: Logical],
  "border-inline-start-style": BorderInlineStartStyle(LineStyle) [logical_group: BorderStyle, category: Logical],
  "border-inline-end-style": BorderInlineEndStyle(LineStyle) [logical_group: BorderStyle, category: Logical],

  "border-top-width": BorderTopWidth(BorderSideWidth) [logical_group: BorderWidth, category: Physical],
  "border-bottom-width": BorderBottomWidth(BorderSideWidth) [logical_group: BorderWidth, category: Physical],
  "border-left-width": BorderLeftWidth(BorderSideWidth) [logical_group: BorderWidth, category: Physical],
  "border-right-width": BorderRightWidth(BorderSideWidth) [logical_group: BorderWidth, category: Physical],
  "border-block-start-width": BorderBlockStartWidth(BorderSideWidth) [logical_group: BorderWidth, category: Logical],
  "border-block-end-width": BorderBlockEndWidth(BorderSideWidth) [logical_group: BorderWidth, category: Logical],
  "border-inline-start-width": BorderInlineStartWidth(BorderSideWidth) [logical_group: BorderWidth, category: Logical],
  "border-inline-end-width": BorderInlineEndWidth(BorderSideWidth) [logical_group: BorderWidth, category: Logical],

  "border-top-left-radius": BorderTopLeftRadius(Size2D<LengthPercentage>, VendorPrefix) / WebKit / Moz [logical_group: BorderRadius, category: Physical],
  "border-top-right-radius": BorderTopRightRadius(Size2D<LengthPercentage>, VendorPrefix) / WebKit / Moz [logical_group: BorderRadius, category: Physical],
  "border-bottom-left-radius": BorderBottomLeftRadius(Size2D<LengthPercentage>, VendorPrefix) / WebKit / Moz [logical_group: BorderRadius, category: Physical],
  "border-bottom-right-radius": BorderBottomRightRadius(Size2D<LengthPercentage>, VendorPrefix) / WebKit / Moz [logical_group: BorderRadius, category: Physical],
  "border-start-start-radius": BorderStartStartRadius(Size2D<LengthPercentage>) [logical_group: BorderRadius, category: Logical],
  "border-start-end-radius": BorderStartEndRadius(Size2D<LengthPercentage>) [logical_group: BorderRadius, category: Logical],
  "border-end-start-radius": BorderEndStartRadius(Size2D<LengthPercentage>) [logical_group: BorderRadius, category: Logical],
  "border-end-end-radius": BorderEndEndRadius(Size2D<LengthPercentage>) [logical_group: BorderRadius, category: Logical],
  "border-radius": BorderRadius(BorderRadius, VendorPrefix) / WebKit / Moz shorthand: true,

  "border-image-source": BorderImageSource(Image<'i>),
  "border-image-outset": BorderImageOutset(Rect<LengthOrNumber>),
  "border-image-repeat": BorderImageRepeat(BorderImageRepeat),
  "border-image-width": BorderImageWidth(Rect<BorderImageSideWidth>),
  "border-image-slice": BorderImageSlice(BorderImageSlice),
  "border-image": BorderImage(BorderImage<'i>, VendorPrefix) / WebKit / Moz / O shorthand: true,

  "border-color": BorderColor(BorderColor) shorthand: true,
  "border-style": BorderStyle(BorderStyle) shorthand: true,
  "border-width": BorderWidth(BorderWidth) shorthand: true,

  "border-block-color": BorderBlockColor(BorderBlockColor) shorthand: true,
  "border-block-style": BorderBlockStyle(BorderBlockStyle) shorthand: true,
  "border-block-width": BorderBlockWidth(BorderBlockWidth) shorthand: true,

  "border-inline-color": BorderInlineColor(BorderInlineColor) shorthand: true,
  "border-inline-style": BorderInlineStyle(BorderInlineStyle) shorthand: true,
  "border-inline-width": BorderInlineWidth(BorderInlineWidth) shorthand: true,

  "border": Border(Border) shorthand: true,
  "border-top": BorderTop(BorderTop) shorthand: true,
  "border-bottom": BorderBottom(BorderBottom) shorthand: true,
  "border-left": BorderLeft(BorderLeft) shorthand: true,
  "border-right": BorderRight(BorderRight) shorthand: true,
  "border-block": BorderBlock(BorderBlock) shorthand: true,
  "border-block-start": BorderBlockStart(BorderBlockStart) shorthand: true,
  "border-block-end": BorderBlockEnd(BorderBlockEnd) shorthand: true,
  "border-inline": BorderInline(BorderInline) shorthand: true,
  "border-inline-start": BorderInlineStart(BorderInlineStart) shorthand: true,
  "border-inline-end": BorderInlineEnd(BorderInlineEnd) shorthand: true,

  "outline": Outline(Outline) shorthand: true,
  "outline-color": OutlineColor(CssColor),
  "outline-style": OutlineStyle(OutlineStyle),
  "outline-width": OutlineWidth(BorderSideWidth),

  // Flex properties: https://www.w3.org/TR/2018/CR-css-flexbox-1-20181119
  "flex-direction": FlexDirection(FlexDirection, VendorPrefix) / WebKit / Ms,
  "flex-wrap": FlexWrap(FlexWrap, VendorPrefix) / WebKit / Ms,
  "flex-flow": FlexFlow(FlexFlow, VendorPrefix) / WebKit / Ms shorthand: true,
  "flex-grow": FlexGrow(CSSNumber, VendorPrefix) / WebKit,
  "flex-shrink": FlexShrink(CSSNumber, VendorPrefix) / WebKit,
  "flex-basis": FlexBasis(LengthPercentageOrAuto, VendorPrefix) / WebKit,
  "flex": Flex(Flex, VendorPrefix) / WebKit / Ms shorthand: true,
  "order": Order(CSSInteger, VendorPrefix) / WebKit,

  // Align properties: https://www.w3.org/TR/2020/WD-css-align-3-20200421
  "align-content": AlignContent(AlignContent, VendorPrefix) / WebKit,
  "justify-content": JustifyContent(JustifyContent, VendorPrefix) / WebKit,
  "place-content": PlaceContent(PlaceContent) shorthand: true,
  "align-self": AlignSelf(AlignSelf, VendorPrefix) / WebKit,
  "justify-self": JustifySelf(JustifySelf),
  "place-self": PlaceSelf(PlaceSelf) shorthand: true,
  "align-items": AlignItems(AlignItems, VendorPrefix) / WebKit,
  "justify-items": JustifyItems(JustifyItems),
  "place-items": PlaceItems(PlaceItems) shorthand: true,
  "row-gap": RowGap(GapValue),
  "column-gap": ColumnGap(GapValue),
  "gap": Gap(Gap) shorthand: true,

  // Old flex (2009): https://www.w3.org/TR/2009/WD-css3-flexbox-20090723/
  "box-orient": BoxOrient(BoxOrient, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-direction": BoxDirection(BoxDirection, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-ordinal-group": BoxOrdinalGroup(CSSInteger, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-align": BoxAlign(BoxAlign, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-flex": BoxFlex(CSSNumber, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-flex-group": BoxFlexGroup(CSSInteger, VendorPrefix) / WebKit unprefixed: false,
  "box-pack": BoxPack(BoxPack, VendorPrefix) / WebKit / Moz unprefixed: false,
  "box-lines": BoxLines(BoxLines, VendorPrefix) / WebKit / Moz unprefixed: false,

  // Old flex (2012): https://www.w3.org/TR/2012/WD-css3-flexbox-20120322/
  "flex-pack": FlexPack(FlexPack, VendorPrefix) / Ms unprefixed: false,
  "flex-order": FlexOrder(CSSInteger, VendorPrefix) / Ms unprefixed: false,
  "flex-align": FlexAlign(BoxAlign, VendorPrefix) / Ms unprefixed: false,
  "flex-item-align": FlexItemAlign(FlexItemAlign, VendorPrefix) / Ms unprefixed: false,
  "flex-line-pack": FlexLinePack(FlexLinePack, VendorPrefix) / Ms unprefixed: false,

  // Microsoft extensions
  "flex-positive": FlexPositive(CSSNumber, VendorPrefix) / Ms unprefixed: false,
  "flex-negative": FlexNegative(CSSNumber, VendorPrefix) / Ms unprefixed: false,
  "flex-preferred-size": FlexPreferredSize(LengthPercentageOrAuto, VendorPrefix) / Ms unprefixed: false,

  "grid-template-columns": GridTemplateColumns(TrackSizing<'i>),
  "grid-template-rows": GridTemplateRows(TrackSizing<'i>),
  "grid-auto-columns": GridAutoColumns(TrackSizeList),
  "grid-auto-rows": GridAutoRows(TrackSizeList),
  "grid-auto-flow": GridAutoFlow(GridAutoFlow),
  "grid-template-areas": GridTemplateAreas(GridTemplateAreas),
  "grid-template": GridTemplate(GridTemplate<'i>) shorthand: true,
  "grid": Grid(Grid<'i>) shorthand: true,
  "grid-row-start": GridRowStart(GridLine<'i>),
  "grid-row-end": GridRowEnd(GridLine<'i>),
  "grid-column-start": GridColumnStart(GridLine<'i>),
  "grid-column-end": GridColumnEnd(GridLine<'i>),
  "grid-row": GridRow(GridRow<'i>) shorthand: true,
  "grid-column": GridColumn(GridColumn<'i>) shorthand: true,
  "grid-area": GridArea(GridArea<'i>) shorthand: true,

  "margin-top": MarginTop(LengthPercentageOrAuto) [logical_group: Margin, category: Physical],
  "margin-bottom": MarginBottom(LengthPercentageOrAuto) [logical_group: Margin, category: Physical],
  "margin-left": MarginLeft(LengthPercentageOrAuto) [logical_group: Margin, category: Physical],
  "margin-right": MarginRight(LengthPercentageOrAuto) [logical_group: Margin, category: Physical],
  "margin-block-start": MarginBlockStart(LengthPercentageOrAuto) [logical_group: Margin, category: Logical],
  "margin-block-end": MarginBlockEnd(LengthPercentageOrAuto) [logical_group: Margin, category: Logical],
  "margin-inline-start": MarginInlineStart(LengthPercentageOrAuto) [logical_group: Margin, category: Logical],
  "margin-inline-end": MarginInlineEnd(LengthPercentageOrAuto) [logical_group: Margin, category: Logical],
  "margin-block": MarginBlock(MarginBlock) shorthand: true,
  "margin-inline": MarginInline(MarginInline) shorthand: true,
  "margin": Margin(Margin) shorthand: true,

  "padding-top": PaddingTop(LengthPercentageOrAuto) [logical_group: Padding, category: Physical],
  "padding-bottom": PaddingBottom(LengthPercentageOrAuto) [logical_group: Padding, category: Physical],
  "padding-left": PaddingLeft(LengthPercentageOrAuto) [logical_group: Padding, category: Physical],
  "padding-right": PaddingRight(LengthPercentageOrAuto) [logical_group: Padding, category: Physical],
  "padding-block-start": PaddingBlockStart(LengthPercentageOrAuto) [logical_group: Padding, category: Logical],
  "padding-block-end": PaddingBlockEnd(LengthPercentageOrAuto) [logical_group: Padding, category: Logical],
  "padding-inline-start": PaddingInlineStart(LengthPercentageOrAuto) [logical_group: Padding, category: Logical],
  "padding-inline-end": PaddingInlineEnd(LengthPercentageOrAuto) [logical_group: Padding, category: Logical],
  "padding-block": PaddingBlock(PaddingBlock) shorthand: true,
  "padding-inline": PaddingInline(PaddingInline) shorthand: true,
  "padding": Padding(Padding) shorthand: true,

  "scroll-margin-top": ScrollMarginTop(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Physical],
  "scroll-margin-bottom": ScrollMarginBottom(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Physical],
  "scroll-margin-left": ScrollMarginLeft(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Physical],
  "scroll-margin-right": ScrollMarginRight(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Physical],
  "scroll-margin-block-start": ScrollMarginBlockStart(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Logical],
  "scroll-margin-block-end": ScrollMarginBlockEnd(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Logical],
  "scroll-margin-inline-start": ScrollMarginInlineStart(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Logical],
  "scroll-margin-inline-end": ScrollMarginInlineEnd(LengthPercentageOrAuto) [logical_group: ScrollMargin, category: Logical],
  "scroll-margin-block": ScrollMarginBlock(ScrollMarginBlock) shorthand: true,
  "scroll-margin-inline": ScrollMarginInline(ScrollMarginInline) shorthand: true,
  "scroll-margin": ScrollMargin(ScrollMargin) shorthand: true,

  "scroll-padding-top": ScrollPaddingTop(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Physical],
  "scroll-padding-bottom": ScrollPaddingBottom(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Physical],
  "scroll-padding-left": ScrollPaddingLeft(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Physical],
  "scroll-padding-right": ScrollPaddingRight(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Physical],
  "scroll-padding-block-start": ScrollPaddingBlockStart(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Logical],
  "scroll-padding-block-end": ScrollPaddingBlockEnd(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Logical],
  "scroll-padding-inline-start": ScrollPaddingInlineStart(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Logical],
  "scroll-padding-inline-end": ScrollPaddingInlineEnd(LengthPercentageOrAuto) [logical_group: ScrollPadding, category: Logical],
  "scroll-padding-block": ScrollPaddingBlock(ScrollPaddingBlock) shorthand: true,
  "scroll-padding-inline": ScrollPaddingInline(ScrollPaddingInline) shorthand: true,
  "scroll-padding": ScrollPadding(ScrollPadding) shorthand: true,

  "font-weight": FontWeight(FontWeight),
  "font-size": FontSize(FontSize),
  "font-stretch": FontStretch(FontStretch),
  "font-family": FontFamily(Vec<FontFamily<'i>>),
  "font-style": FontStyle(FontStyle),
  "font-variant-caps": FontVariantCaps(FontVariantCaps),
  "line-height": LineHeight(LineHeight),
  "font": Font(Font<'i>) shorthand: true,
  "vertical-align": VerticalAlign(VerticalAlign),
  "font-palette": FontPalette(DashedIdentReference<'i>),

  "transition-property": TransitionProperty(SmallVec<[PropertyId<'i>; 1]>, VendorPrefix) / WebKit / Moz / Ms,
  "transition-duration": TransitionDuration(SmallVec<[Time; 1]>, VendorPrefix) / WebKit / Moz / Ms,
  "transition-delay": TransitionDelay(SmallVec<[Time; 1]>, VendorPrefix) / WebKit / Moz / Ms,
  "transition-timing-function": TransitionTimingFunction(SmallVec<[EasingFunction; 1]>, VendorPrefix) / WebKit / Moz / Ms,
  "transition": Transition(SmallVec<[Transition<'i>; 1]>, VendorPrefix) / WebKit / Moz / Ms shorthand: true,

  "animation-name": AnimationName(AnimationNameList<'i>, VendorPrefix) / WebKit / Moz / O,
  "animation-duration": AnimationDuration(SmallVec<[Time; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-timing-function": AnimationTimingFunction(SmallVec<[EasingFunction; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-iteration-count": AnimationIterationCount(SmallVec<[AnimationIterationCount; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-direction": AnimationDirection(SmallVec<[AnimationDirection; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-play-state": AnimationPlayState(SmallVec<[AnimationPlayState; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-delay": AnimationDelay(SmallVec<[Time; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-fill-mode": AnimationFillMode(SmallVec<[AnimationFillMode; 1]>, VendorPrefix) / WebKit / Moz / O,
  "animation-composition": AnimationComposition(SmallVec<[AnimationComposition; 1]>),
  "animation-timeline": AnimationTimeline(SmallVec<[AnimationTimeline<'i>; 1]>),
  "animation-range-start": AnimationRangeStart(SmallVec<[AnimationRangeStart; 1]>),
  "animation-range-end": AnimationRangeEnd(SmallVec<[AnimationRangeEnd; 1]>),
  "animation-range": AnimationRange(SmallVec<[AnimationRange; 1]>),
  "animation": Animation(AnimationList<'i>, VendorPrefix) / WebKit / Moz / O shorthand: true,

  // https://drafts.csswg.org/css-transforms-2/
  "transform": Transform(TransformList, VendorPrefix) / WebKit / Moz / Ms / O,
  "transform-origin": TransformOrigin(Position, VendorPrefix) / WebKit / Moz / Ms / O, // TODO: handle z offset syntax
  "transform-style": TransformStyle(TransformStyle, VendorPrefix) / WebKit / Moz,
  "transform-box": TransformBox(TransformBox),
  "backface-visibility": BackfaceVisibility(BackfaceVisibility, VendorPrefix) / WebKit / Moz,
  "perspective": Perspective(Perspective, VendorPrefix) / WebKit / Moz,
  "perspective-origin": PerspectiveOrigin(Position, VendorPrefix) / WebKit / Moz,
  "translate": Translate(Translate),
  "rotate": Rotate(Rotate),
  "scale": Scale(Scale),

  // https://www.w3.org/TR/2021/CRD-css-text-3-20210422
  "text-transform": TextTransform(TextTransform),
  "white-space": WhiteSpace(WhiteSpace),
  "tab-size": TabSize(LengthOrNumber, VendorPrefix) / Moz / O,
  "word-break": WordBreak(WordBreak),
  "line-break": LineBreak(LineBreak),
  "hyphens": Hyphens(Hyphens, VendorPrefix) / WebKit / Moz / Ms,
  "overflow-wrap": OverflowWrap(OverflowWrap),
  "word-wrap": WordWrap(OverflowWrap),
  "text-align": TextAlign(TextAlign),
  "text-align-last": TextAlignLast(TextAlignLast, VendorPrefix) / Moz,
  "text-justify": TextJustify(TextJustify),
  "word-spacing": WordSpacing(Spacing),
  "letter-spacing": LetterSpacing(Spacing),
  "text-indent": TextIndent(TextIndent),

  // https://www.w3.org/TR/2020/WD-css-text-decor-4-20200506
  "text-decoration-line": TextDecorationLine(TextDecorationLine, VendorPrefix) / WebKit / Moz,
  "text-decoration-style": TextDecorationStyle(TextDecorationStyle, VendorPrefix) / WebKit / Moz,
  "text-decoration-color": TextDecorationColor(CssColor, VendorPrefix) / WebKit / Moz,
  "text-decoration-thickness": TextDecorationThickness(TextDecorationThickness),
  "text-decoration": TextDecoration(TextDecoration, VendorPrefix) / WebKit / Moz shorthand: true,
  "text-decoration-skip-ink": TextDecorationSkipInk(TextDecorationSkipInk, VendorPrefix) / WebKit,
  "text-emphasis-style": TextEmphasisStyle(TextEmphasisStyle<'i>, VendorPrefix) / WebKit,
  "text-emphasis-color": TextEmphasisColor(CssColor, VendorPrefix) / WebKit,
  "text-emphasis": TextEmphasis(TextEmphasis<'i>, VendorPrefix) / WebKit shorthand: true,
  "text-emphasis-position": TextEmphasisPosition(TextEmphasisPosition, VendorPrefix) / WebKit,
  "text-shadow": TextShadow(SmallVec<[TextShadow; 1]>),

  // https://w3c.github.io/csswg-drafts/css-size-adjust/
  "text-size-adjust": TextSizeAdjust(TextSizeAdjust, VendorPrefix) / WebKit / Moz / Ms,

  // https://drafts.csswg.org/css-writing-modes-3/
  "direction": Direction(Direction),
  "unicode-bidi": UnicodeBidi(UnicodeBidi),

  // https://www.w3.org/TR/css-break-3/
  "box-decoration-break": BoxDecorationBreak(BoxDecorationBreak, VendorPrefix) / WebKit,

  // https://www.w3.org/TR/2021/WD-css-ui-4-20210316
  "resize": Resize(Resize),
  "cursor": Cursor(Cursor<'i>),
  "caret-color": CaretColor(ColorOrAuto),
  "caret-shape": CaretShape(CaretShape),
  "caret": Caret(Caret) shorthand: true,
  "user-select": UserSelect(UserSelect, VendorPrefix) / WebKit / Moz / Ms,
  "accent-color": AccentColor(ColorOrAuto),
  "appearance": Appearance(Appearance<'i>, VendorPrefix) / WebKit / Moz / Ms,

  // https://www.w3.org/TR/2020/WD-css-lists-3-20201117
  "list-style-type": ListStyleType(ListStyleType<'i>),
  "list-style-image": ListStyleImage(Image<'i>),
  "list-style-position": ListStylePosition(ListStylePosition),
  "list-style": ListStyle(ListStyle<'i>) shorthand: true,
  "marker-side": MarkerSide(MarkerSide),

  // CSS modules
  "composes": Composes(Composes<'i>) if css_modules,

  // https://www.w3.org/TR/SVG2/painting.html
  "fill": Fill(SVGPaint<'i>),
  "fill-rule": FillRule(FillRule),
  "fill-opacity": FillOpacity(AlphaValue),
  "stroke": Stroke(SVGPaint<'i>),
  "stroke-opacity": StrokeOpacity(AlphaValue),
  "stroke-width": StrokeWidth(LengthPercentage),
  "stroke-linecap": StrokeLinecap(StrokeLinecap),
  "stroke-linejoin": StrokeLinejoin(StrokeLinejoin),
  "stroke-miterlimit": StrokeMiterlimit(CSSNumber),
  "stroke-dasharray": StrokeDasharray(StrokeDasharray),
  "stroke-dashoffset": StrokeDashoffset(LengthPercentage),
  "marker-start": MarkerStart(Marker<'i>),
  "marker-mid": MarkerMid(Marker<'i>),
  "marker-end": MarkerEnd(Marker<'i>),
  "marker": Marker(Marker<'i>),
  "color-interpolation": ColorInterpolation(ColorInterpolation),
  "color-interpolation-filters": ColorInterpolationFilters(ColorInterpolation),
  "color-rendering": ColorRendering(ColorRendering),
  "shape-rendering": ShapeRendering(ShapeRendering),
  "text-rendering": TextRendering(TextRendering),
  "image-rendering": ImageRendering(ImageRendering),

  // https://www.w3.org/TR/css-masking-1/
  "clip-path": ClipPath(ClipPath<'i>, VendorPrefix) / WebKit,
  "clip-rule": ClipRule(FillRule),
  "mask-image": MaskImage(SmallVec<[Image<'i>; 1]>, VendorPrefix) / WebKit,
  "mask-mode": MaskMode(SmallVec<[MaskMode; 1]>),
  "mask-repeat": MaskRepeat(SmallVec<[BackgroundRepeat; 1]>, VendorPrefix) / WebKit,
  "mask-position-x": MaskPositionX(SmallVec<[HorizontalPosition; 1]>),
  "mask-position-y": MaskPositionY(SmallVec<[VerticalPosition; 1]>),
  "mask-position": MaskPosition(SmallVec<[Position; 1]>, VendorPrefix) / WebKit,
  "mask-clip": MaskClip(SmallVec<[MaskClip; 1]>, VendorPrefix) / WebKit,
  "mask-origin": MaskOrigin(SmallVec<[GeometryBox; 1]>, VendorPrefix) / WebKit,
  "mask-size": MaskSize(SmallVec<[BackgroundSize; 1]>, VendorPrefix) / WebKit,
  "mask-composite": MaskComposite(SmallVec<[MaskComposite; 1]>),
  "mask-type": MaskType(MaskType),
  "mask": Mask(SmallVec<[Mask<'i>; 1]>, VendorPrefix) / WebKit shorthand: true,
  "mask-border-source": MaskBorderSource(Image<'i>),
  "mask-border-mode": MaskBorderMode(MaskBorderMode),
  "mask-border-slice": MaskBorderSlice(BorderImageSlice),
  "mask-border-width": MaskBorderWidth(Rect<BorderImageSideWidth>),
  "mask-border-outset": MaskBorderOutset(Rect<LengthOrNumber>),
  "mask-border-repeat": MaskBorderRepeat(BorderImageRepeat),
  "mask-border": MaskBorder(MaskBorder<'i>) shorthand: true,

  // WebKit additions
  "-webkit-mask-composite": WebKitMaskComposite(SmallVec<[WebKitMaskComposite; 1]>),
  "mask-source-type": WebKitMaskSourceType(SmallVec<[WebKitMaskSourceType; 1]>, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image": WebKitMaskBoxImage(BorderImage<'i>, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image-source": WebKitMaskBoxImageSource(Image<'i>, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image-slice": WebKitMaskBoxImageSlice(BorderImageSlice, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image-width": WebKitMaskBoxImageWidth(Rect<BorderImageSideWidth>, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image-outset": WebKitMaskBoxImageOutset(Rect<LengthOrNumber>, VendorPrefix) / WebKit unprefixed: false,
  "mask-box-image-repeat": WebKitMaskBoxImageRepeat(BorderImageRepeat, VendorPrefix) / WebKit unprefixed: false,

  // https://drafts.fxtf.org/filter-effects-1/
  "filter": Filter(FilterList<'i>, VendorPrefix) / WebKit,
  "backdrop-filter": BackdropFilter(FilterList<'i>, VendorPrefix) / WebKit,

  // https://drafts.csswg.org/css2/
  "z-index": ZIndex(position::ZIndex),

  // https://drafts.csswg.org/css-contain-3/
  "container-type": ContainerType(ContainerType),
  "container-name": ContainerName(ContainerNameList<'i>),
  "container": Container(Container<'i>) shorthand: true,

  // https://w3c.github.io/csswg-drafts/css-view-transitions-1/
  "view-transition-name": ViewTransitionName(ViewTransitionName<'i>),
  // https://drafts.csswg.org/css-view-transitions-2/
  "view-transition-class": ViewTransitionClass(NoneOrCustomIdentList<'i>),
  "view-transition-group": ViewTransitionGroup(ViewTransitionGroup<'i>),

  // https://drafts.csswg.org/css-color-adjust/
  "color-scheme": ColorScheme(ColorScheme),
}

impl<'i, T: smallvec::Array<Item = V>, V: Parse<'i>> Parse<'i> for SmallVec<T> {
  fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    // Copied from cssparser `parse_comma_separated` but using SmallVec instead of Vec.
    let mut values = smallvec![];
    loop {
      input.skip_whitespace(); // Unnecessary for correctness, but may help try() in parse_one rewind less.
      match input.parse_until_before(Delimiter::Comma, &mut V::parse) {
        Ok(v) => values.push(v),
        Err(err) => return Err(err),
      }
      match input.next() {
        Err(_) => return Ok(values),
        Ok(&cssparser::Token::Comma) => continue,
        Ok(_) => unreachable!(),
      }
    }
  }
}

impl<T: smallvec::Array<Item = V>, V: ToCss> ToCss for SmallVec<T> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    let len = self.len();
    for (idx, val) in self.iter().enumerate() {
      val.to_css(dest)?;
      if idx < len - 1 {
        dest.delim(',', false)?;
      }
    }
    Ok(())
  }
}

impl<'i, T: Parse<'i>> Parse<'i> for Vec<T> {
  fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    input.parse_comma_separated(|input| T::parse(input))
  }
}

impl<T: ToCss> ToCss for Vec<T> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    let len = self.len();
    for (idx, val) in self.iter().enumerate() {
      val.to_css(dest)?;
      if idx < len - 1 {
        dest.delim(',', false)?;
      }
    }
    Ok(())
  }
}

enum_property! {
  /// A [CSS-wide keyword](https://drafts.csswg.org/css-cascade-5/#defaulting-keywords).
  pub enum CSSWideKeyword {
    /// The property's initial value.
    "initial": Initial,
    /// The property's computed value on the parent element.
    "inherit": Inherit,
    /// Either inherit or initial depending on whether the property is inherited.
    "unset": Unset,
    /// Rolls back the cascade to the cascaded value of the earlier origin.
    "revert": Revert,
    /// Rolls back the cascade to the value of the previous cascade layer.
    "revert-layer": RevertLayer,
  }
}