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Add separate specified value for keyword font sizes

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In Gecko, these keywords compute to different values depending on the
font.

See https://bugzilla.mozilla.org/show_bug.cgi?id=1341775
This commit is contained in:
Manish Goregaokar 2017-03-17 20:23:19 -07:00
parent bb54f0a429
commit c9198d92d5
6 changed files with 162 additions and 109 deletions
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42
components/style/values/specified/length.rs
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@ -276,38 +276,6 @@ impl Mul<CSSFloat> for NoCalcLength {
}
impl NoCalcLength {
/// https://drafts.csswg.org/css-fonts-3/#font-size-prop
pub fn from_str(s: &str) -> Option<NoCalcLength> {
Some(match_ignore_ascii_case! { s,
"xx-small" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 3 / 5),
"x-small" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 3 / 4),
"small" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 8 / 9),
"medium" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX)),
"large" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 6 / 5),
"x-large" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 3 / 2),
"xx-large" => NoCalcLength::Absolute(Au::from_px(FONT_MEDIUM_PX) * 2),
// https://github.com/servo/servo/issues/3423#issuecomment-56321664
"smaller" => NoCalcLength::FontRelative(FontRelativeLength::Em(0.85)),
"larger" => NoCalcLength::FontRelative(FontRelativeLength::Em(1.2)),
_ => return None
})
}
/// https://drafts.csswg.org/css-fonts-3/#font-size-prop
pub fn from_font_size_int(i: u8) -> Self {
let au = match i {
0 | 1 => Au::from_px(FONT_MEDIUM_PX) * 3 / 4,
2 => Au::from_px(FONT_MEDIUM_PX) * 8 / 9,
3 => Au::from_px(FONT_MEDIUM_PX),
4 => Au::from_px(FONT_MEDIUM_PX) * 6 / 5,
5 => Au::from_px(FONT_MEDIUM_PX) * 3 / 2,
6 => Au::from_px(FONT_MEDIUM_PX) * 2,
_ => Au::from_px(FONT_MEDIUM_PX) * 3,
};
NoCalcLength::Absolute(au)
}
/// Parse a given absolute or relative dimension.
pub fn parse_dimension(value: CSSFloat, unit: &str) -> Result<NoCalcLength, ()> {
match_ignore_ascii_case! { unit,
@ -444,21 +412,11 @@ impl Length {
Length::NoCalc(NoCalcLength::zero())
}
/// https://drafts.csswg.org/css-fonts-3/#font-size-prop
pub fn from_str(s: &str) -> Option<Length> {
NoCalcLength::from_str(s).map(Length::NoCalc)
}
/// Parse a given absolute or relative dimension.
pub fn parse_dimension(value: CSSFloat, unit: &str) -> Result<Length, ()> {
NoCalcLength::parse_dimension(value, unit).map(Length::NoCalc)
}
/// https://drafts.csswg.org/css-fonts-3/#font-size-prop
pub fn from_font_size_int(i: u8) -> Self {
Length::NoCalc(NoCalcLength::from_font_size_int(i))
}
#[inline]
fn parse_internal(input: &mut Parser, context: AllowedNumericType) -> Result<Length, ()> {
match try!(input.next()) {