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style: Simplify font_size::SpecifiedValue::as_font_ratio.

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Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
This commit is contained in:
Emilio Cobos Álvarez 2017-07-14 13:33:53 +02:00
parent 465e6f14fe
commit e30ed4ef44
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GPG key ID: 056B727BB9C1027C
1 changed files with 22 additions and 15 deletions
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37
components/style/properties/longhand/font.mako.rs
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@ -768,23 +768,31 @@ ${helpers.single_keyword_system("font-variant-caps",
}, 1.)
}
/// If this value is specified as a ratio of the parent font (em units or percent)
/// return the ratio
/// If this value is specified as a ratio of the parent font (em units
/// or percent) return the ratio
pub fn as_font_ratio(&self) -> Option<f32> {
if let SpecifiedValue::Length(ref lop) = *self {
if let LengthOrPercentage::Percentage(pc) = *lop {
return Some(pc.0)
} else if let LengthOrPercentage::Length(ref nocalc) = *lop {
if let NoCalcLength::FontRelative(FontRelativeLength::Em(em)) = *nocalc {
return Some(em)
match *self {
SpecifiedValue::Length(ref lop) => {
match *lop {
LengthOrPercentage::Percentage(pc) => {
Some(pc.0)
}
LengthOrPercentage::Length(ref nocalc) => {
match *nocalc {
NoCalcLength::FontRelative(FontRelativeLength::Em(em)) => {
Some(em)
}
_ => None,
}
}
// FIXME(emilio): This looks super fishy!
LengthOrPercentage::Calc(..) => None,
}
}
} else if let SpecifiedValue::Larger = *self {
return Some(LARGER_FONT_SIZE_RATIO)
} else if let SpecifiedValue::Smaller = *self {
return Some(1. / LARGER_FONT_SIZE_RATIO)
SpecifiedValue::Larger => Some(LARGER_FONT_SIZE_RATIO),
SpecifiedValue::Smaller => Some(1. / LARGER_FONT_SIZE_RATIO),
_ => None,
}
None
}
/// Compute it against a given base font size
@ -902,8 +910,7 @@ ${helpers.single_keyword_system("font-variant-caps",
specified_value: &SpecifiedValue,
mut computed: Au,
parent: &Font) {
if let SpecifiedValue::Keyword(kw, fraction)
= *specified_value {
if let SpecifiedValue::Keyword(kw, fraction) = *specified_value {
context.mutate_style().font_size_keyword = Some((kw, fraction));
} else if let Some(ratio) = specified_value.as_font_ratio() {
// In case a font-size-relative value was applied to a keyword