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style: Update font-size-adjust keywords to match CSSWG resolution in csswg-drafts/#6288

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Differential Revision: https://phabricator.services.mozilla.com/D118198
This commit is contained in:
Jonathan Kew 2023-05-22 10:01:51 +02:00 • committed by Oriol Brufau
parent 25edb3c21b
commit 695ff236c8
2 changed files with 20 additions and 15 deletions
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22
components/style/values/generics/font.rs
View file

@ -207,6 +207,7 @@ pub enum FontStyle<Angle> {
///
/// https://www.w3.org/TR/css-fonts-4/#font-size-adjust-prop
/// https://github.com/w3c/csswg-drafts/issues/6160
/// https://github.com/w3c/csswg-drafts/issues/6288
#[allow(missing_docs)]
#[repr(u8)]
#[derive(
@ -228,14 +229,16 @@ pub enum FontStyle<Angle> {
pub enum GenericFontSizeAdjust<Number> {
#[animation(error)]
None,
// 'ex' is the implied basis, so the keyword can be omitted
Ex(Number),
// 'ex-height' is the implied basis, so the keyword can be omitted
ExHeight(Number),
#[value_info(starts_with_keyword)]
Cap(Number),
CapHeight(Number),
#[value_info(starts_with_keyword)]
Ch(Number),
ChWidth(Number),
#[value_info(starts_with_keyword)]
Ic(Number),
IcWidth(Number),
#[value_info(starts_with_keyword)]
IcHeight(Number),
}
impl<Number: ToCss> ToCss for GenericFontSizeAdjust<Number> {
@ -245,10 +248,11 @@ impl<Number: ToCss> ToCss for GenericFontSizeAdjust<Number> {
{
let (prefix, value) = match self {
Self::None => return dest.write_str("none"),
Self::Ex(v) => ("", v),
Self::Cap(v) => ("cap ", v),
Self::Ch(v) => ("ch ", v),
Self::Ic(v) => ("ic ", v),
Self::ExHeight(v) => ("", v),
Self::CapHeight(v) => ("cap-height ", v),
Self::ChWidth(v) => ("ch-width ", v),
Self::IcWidth(v) => ("ic-width ", v),
Self::IcHeight(v) => ("ic-height ", v),
};
dest.write_str(prefix)?;

13
components/style/values/specified/font.rs
View file

@ -794,10 +794,11 @@ impl Parse for FontSizeAdjust {
let basis = match_ignore_ascii_case! { &ident,
"none" => return Ok(FontSizeAdjust::none()),
// Check for size adjustment basis keywords if enabled.
"ex" if basis_enabled => GenericFontSizeAdjust::Ex,
"cap" if basis_enabled => GenericFontSizeAdjust::Cap,
"ch" if basis_enabled => GenericFontSizeAdjust::Ch,
"ic" if basis_enabled => GenericFontSizeAdjust::Ic,
"ex-height" if basis_enabled => GenericFontSizeAdjust::ExHeight,
"cap-height" if basis_enabled => GenericFontSizeAdjust::CapHeight,
"ch-width" if basis_enabled => GenericFontSizeAdjust::ChWidth,
"ic-width" if basis_enabled => GenericFontSizeAdjust::IcWidth,
"ic-height" if basis_enabled => GenericFontSizeAdjust::IcHeight,
// Unknown (or disabled) keyword.
_ => return Err(location.new_custom_error(
::selectors::parser::SelectorParseErrorKind::UnexpectedIdent(ident)
@ -806,9 +807,9 @@ impl Parse for FontSizeAdjust {
let value = NonNegativeNumber::parse(context, input)?;
return Ok(FontSizeAdjust::Value(basis(value)));
}
// Without a basis keyword, the number refers to the 'ex' metric.
// Without a basis keyword, the number refers to the 'ex-height' metric.
let value = NonNegativeNumber::parse(context, input)?;
Ok(FontSizeAdjust::Value(GenericFontSizeAdjust::Ex(value)))
Ok(FontSizeAdjust::Value(GenericFontSizeAdjust::ExHeight(value)))
}
}