lightningcss 1.0.0-alpha.44

//! The `@container` rule.

use cssparser::*;

use super::Location;
use super::{CssRuleList, MinifyContext};
use crate::error::{MinifyError, ParserError, PrinterError};
use crate::media_query::{
  define_query_features, operation_to_css, parse_query_condition, to_css_with_parens_if_needed, FeatureToCss,
  MediaFeatureType, Operator, QueryCondition, QueryConditionFlags, QueryFeature, ValueType,
};
use crate::parser::DefaultAtRule;
use crate::printer::Printer;
use crate::properties::{Property, PropertyId};
#[cfg(feature = "serde")]
use crate::serialization::ValueWrapper;
use crate::targets::{Features, Targets};
use crate::traits::{Parse, ToCss};
use crate::values::ident::CustomIdent;
#[cfg(feature = "visitor")]
use crate::visitor::Visit;

/// A [@container](https://drafts.csswg.org/css-contain-3/#container-rule) rule.
#[derive(Debug, PartialEq, Clone)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct ContainerRule<'i, R = DefaultAtRule> {
  /// The name of the container.
  #[cfg_attr(feature = "serde", serde(borrow))]
  pub name: Option<ContainerName<'i>>,
  /// The container condition.
  pub condition: ContainerCondition<'i>,
  /// The rules within the `@container` rule.
  pub rules: CssRuleList<'i, R>,
  /// The location of the rule in the source file.
  #[cfg_attr(feature = "visitor", skip_visit)]
  pub loc: Location,
}

/// Represents a container condition.
#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "into_owned", derive(lightningcss_derive::IntoOwned))]
#[cfg_attr(
  feature = "serde",
  derive(serde::Serialize, serde::Deserialize),
  serde(tag = "type", rename_all = "kebab-case")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub enum ContainerCondition<'i> {
  /// A size container feature, implicitly parenthesized.
  #[cfg_attr(feature = "serde", serde(borrow, with = "ValueWrapper::<ContainerSizeFeature>"))]
  Feature(ContainerSizeFeature<'i>),
  /// A negation of a condition.
  #[cfg_attr(feature = "visitor", skip_type)]
  #[cfg_attr(feature = "serde", serde(with = "ValueWrapper::<Box<ContainerCondition>>"))]
  Not(Box<ContainerCondition<'i>>),
  /// A set of joint operations.
  #[cfg_attr(feature = "visitor", skip_type)]
  Operation {
    /// The operator for the conditions.
    operator: Operator,
    /// The conditions for the operator.
    conditions: Vec<ContainerCondition<'i>>,
  },
  /// A style query.
  #[cfg_attr(feature = "serde", serde(borrow, with = "ValueWrapper::<StyleQuery>"))]
  Style(StyleQuery<'i>),
}

/// A container query size feature.
pub type ContainerSizeFeature<'i> = QueryFeature<'i, ContainerSizeFeatureId>;

define_query_features! {
  /// A container query size feature identifier.
  pub enum ContainerSizeFeatureId {
    /// The [width](https://w3c.github.io/csswg-drafts/css-contain-3/#width) size container feature.
    "width": Width = Length,
    /// The [height](https://w3c.github.io/csswg-drafts/css-contain-3/#height) size container feature.
    "height": Height = Length,
    /// The [inline-size](https://w3c.github.io/csswg-drafts/css-contain-3/#inline-size) size container feature.
    "inline-size": InlineSize = Length,
    /// The [block-size](https://w3c.github.io/csswg-drafts/css-contain-3/#block-size) size container feature.
    "block-size": BlockSize = Length,
    /// The [aspect-ratio](https://w3c.github.io/csswg-drafts/css-contain-3/#aspect-ratio) size container feature.
    "aspect-ratio": AspectRatio = Ratio,
    /// The [orientation](https://w3c.github.io/csswg-drafts/css-contain-3/#orientation) size container feature.
    "orientation": Orientation = Ident,
  }
}

impl FeatureToCss for ContainerSizeFeatureId {
  fn to_css_with_prefix<W>(&self, prefix: &str, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    dest.write_str(prefix)?;
    self.to_css(dest)
  }
}

/// Represents a style query within a container condition.
#[derive(Clone, Debug, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "into_owned", derive(lightningcss_derive::IntoOwned))]
#[cfg_attr(
  feature = "serde",
  derive(serde::Serialize, serde::Deserialize),
  serde(tag = "type", rename_all = "kebab-case")
)]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub enum StyleQuery<'i> {
  /// A style feature, implicitly parenthesized.
  #[cfg_attr(feature = "serde", serde(borrow, with = "ValueWrapper::<Property>"))]
  Feature(Property<'i>),
  /// A negation of a condition.
  #[cfg_attr(feature = "visitor", skip_type)]
  #[cfg_attr(feature = "serde", serde(with = "ValueWrapper::<Box<StyleQuery>>"))]
  Not(Box<StyleQuery<'i>>),
  /// A set of joint operations.
  #[cfg_attr(feature = "visitor", skip_type)]
  Operation {
    /// The operator for the conditions.
    operator: Operator,
    /// The conditions for the operator.
    conditions: Vec<StyleQuery<'i>>,
  },
}

impl<'i> QueryCondition<'i> for ContainerCondition<'i> {
  #[inline]
  fn parse_feature<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    let feature = QueryFeature::parse(input)?;
    Ok(Self::Feature(feature))
  }

  #[inline]
  fn create_negation(condition: Box<ContainerCondition<'i>>) -> Self {
    Self::Not(condition)
  }

  #[inline]
  fn create_operation(operator: Operator, conditions: Vec<Self>) -> Self {
    Self::Operation { operator, conditions }
  }

  fn parse_style_query<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    input.parse_nested_block(|input| {
      if let Ok(res) = input.try_parse(|input| parse_query_condition(input, QueryConditionFlags::ALLOW_OR)) {
        return Ok(Self::Style(res));
      }

      Ok(Self::Style(StyleQuery::parse_feature(input)?))
    })
  }

  fn needs_parens(&self, parent_operator: Option<Operator>, targets: &Targets) -> bool {
    match self {
      ContainerCondition::Not(_) => true,
      ContainerCondition::Operation { operator, .. } => Some(*operator) != parent_operator,
      ContainerCondition::Feature(f) => f.needs_parens(parent_operator, targets),
      ContainerCondition::Style(_) => false,
    }
  }
}

impl<'i> QueryCondition<'i> for StyleQuery<'i> {
  #[inline]
  fn parse_feature<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    let property_id = PropertyId::parse(input)?;
    input.expect_colon()?;
    input.skip_whitespace();
    let feature = Self::Feature(Property::parse(property_id, input, &Default::default())?);
    let _ = input.try_parse(|input| parse_important(input));
    Ok(feature)
  }

  #[inline]
  fn create_negation(condition: Box<Self>) -> Self {
    Self::Not(condition)
  }

  #[inline]
  fn create_operation(operator: Operator, conditions: Vec<Self>) -> Self {
    Self::Operation { operator, conditions }
  }

  fn needs_parens(&self, parent_operator: Option<Operator>, _targets: &Targets) -> bool {
    match self {
      StyleQuery::Not(_) => true,
      StyleQuery::Operation { operator, .. } => Some(*operator) != parent_operator,
      StyleQuery::Feature(_) => true,
    }
  }
}

impl<'i> Parse<'i> for ContainerCondition<'i> {
  fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    parse_query_condition(input, QueryConditionFlags::ALLOW_OR | QueryConditionFlags::ALLOW_STYLE)
  }
}

impl<'i> ToCss for ContainerCondition<'i> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    match *self {
      ContainerCondition::Feature(ref f) => f.to_css(dest),
      ContainerCondition::Not(ref c) => {
        dest.write_str("not ")?;
        to_css_with_parens_if_needed(&**c, dest, c.needs_parens(None, &dest.targets))
      }
      ContainerCondition::Operation {
        ref conditions,
        operator,
      } => operation_to_css(operator, conditions, dest),
      ContainerCondition::Style(ref query) => {
        dest.write_str("style(")?;
        query.to_css(dest)?;
        dest.write_char(')')
      }
    }
  }
}

impl<'i> ToCss for StyleQuery<'i> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    match *self {
      StyleQuery::Feature(ref f) => f.to_css(dest, false),
      StyleQuery::Not(ref c) => {
        dest.write_str("not ")?;
        to_css_with_parens_if_needed(&**c, dest, c.needs_parens(None, &dest.targets))
      }
      StyleQuery::Operation {
        ref conditions,
        operator,
      } => operation_to_css(operator, conditions, dest),
    }
  }
}

/// A [`<container-name>`](https://drafts.csswg.org/css-contain-3/#typedef-container-name) in a `@container` rule.
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "visitor", derive(Visit))]
#[cfg_attr(feature = "into_owned", derive(lightningcss_derive::IntoOwned))]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize), serde(transparent))]
#[cfg_attr(feature = "jsonschema", derive(schemars::JsonSchema))]
pub struct ContainerName<'i>(#[cfg_attr(feature = "serde", serde(borrow))] pub CustomIdent<'i>);

impl<'i> Parse<'i> for ContainerName<'i> {
  fn parse<'t>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i, ParserError<'i>>> {
    let ident = CustomIdent::parse(input)?;
    match_ignore_ascii_case! { &*ident.0,
      "none" | "and" | "not" | "or" => Err(input.new_unexpected_token_error(Token::Ident(ident.0.as_ref().to_owned().into()))),
      _ => Ok(ContainerName(ident))
    }
  }
}

impl<'i> ToCss for ContainerName<'i> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    self.0.to_css(dest)
  }
}

impl<'i, T: Clone> ContainerRule<'i, T> {
  pub(crate) fn minify(
    &mut self,
    context: &mut MinifyContext<'_, 'i>,
    parent_is_unused: bool,
  ) -> Result<bool, MinifyError> {
    self.rules.minify(context, parent_is_unused)?;
    Ok(self.rules.0.is_empty())
  }
}

impl<'a, 'i, T: ToCss> ToCss for ContainerRule<'i, T> {
  fn to_css<W>(&self, dest: &mut Printer<W>) -> Result<(), PrinterError>
  where
    W: std::fmt::Write,
  {
    #[cfg(feature = "sourcemap")]
    dest.add_mapping(self.loc);
    dest.write_str("@container ")?;
    if let Some(name) = &self.name {
      name.to_css(dest)?;
      dest.write_char(' ')?;
    }

    // Don't downlevel range syntax in container queries.
    let exclude = dest.targets.exclude;
    dest.targets.exclude.insert(Features::MediaQueries);
    self.condition.to_css(dest)?;
    dest.targets.exclude = exclude;

    dest.whitespace()?;
    dest.write_char('{')?;
    dest.indent();
    dest.newline()?;
    self.rules.to_css(dest)?;
    dest.dedent();
    dest.newline()?;
    dest.write_char('}')
  }
}