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Split the Length type (introduce NoCalcLength)

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This commit is contained in:
Ravi Shankar 2017-01-15 21:46:48 +05:30
parent 556a46f537
commit 4035bbd738
4 changed files with 154 additions and 89 deletions
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39
components/style/values/computed/length.rs
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@ -17,6 +17,45 @@ pub use super::image::{EndingShape as GradientShape, Gradient, GradientKind, Ima
pub use super::image::{LengthOrKeyword, LengthOrPercentageOrKeyword};
pub use values::specified::{Angle, BorderStyle, Time, UrlOrNone};
impl ToComputedValue for specified::NoCalcLength {
type ComputedValue = Au;
#[inline]
fn to_computed_value(&self, context: &Context) -> Au {
match *self {
specified::NoCalcLength::Absolute(length) => length,
specified::NoCalcLength::FontRelative(length) =>
length.to_computed_value(context, /* use inherited */ false),
specified::NoCalcLength::ViewportPercentage(length) =>
length.to_computed_value(context.viewport_size()),
specified::NoCalcLength::ServoCharacterWidth(length) =>
length.to_computed_value(context.style().get_font().clone_font_size())
}
}
#[inline]
fn from_computed_value(computed: &Au) -> Self {
specified::NoCalcLength::Absolute(*computed)
}
}
impl ToComputedValue for specified::Length {
type ComputedValue = Au;
#[inline]
fn to_computed_value(&self, context: &Context) -> Au {
match *self {
specified::Length::NoCalc(l) => l.to_computed_value(context),
specified::Length::Calc(ref calc, range) => range.clamp(calc.to_computed_value(context).length()),
}
}
#[inline]
fn from_computed_value(computed: &Au) -> Self {
specified::Length::NoCalc(specified::NoCalcLength::from_computed_value(computed))
}
}
#[derive(Clone, PartialEq, Copy, Debug)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
#[allow(missing_docs)]