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Introduce style::values::generics::rect ▭

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This defines a single type Rect<T> which allows us to abstract over
CSS values made of four sides top, right, bottom and left.
This commit is contained in:
Anthony Ramine 2017-05-23 02:40:12 +02:00
parent e9c5860808
commit 7a214831f0
10 changed files with 169 additions and 105 deletions
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110
components/style/properties/longhand/border.mako.rs
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@ -200,109 +200,13 @@ ${helpers.predefined_type("border-image-source", "ImageLayer",
has_uncacheable_values=False,
boxed="True")}
<%helpers:longhand name="border-image-outset" animation_value_type="none"
spec="https://drafts.csswg.org/css-backgrounds/#border-image-outset">
use std::fmt;
use style_traits::ToCss;
use values::specified::{LengthOrNumber, Number};
pub mod computed_value {
use values::computed::LengthOrNumber;
#[derive(Debug, Clone, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct T(pub LengthOrNumber, pub LengthOrNumber,
pub LengthOrNumber, pub LengthOrNumber);
}
#[derive(Clone, Debug, HasViewportPercentage, PartialEq)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct SpecifiedValue(pub Vec<LengthOrNumber>);
impl ToCss for computed_value::T {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
try!(self.0.to_css(dest));
try!(dest.write_str(" "));
try!(self.1.to_css(dest));
try!(dest.write_str(" "));
try!(self.2.to_css(dest));
try!(dest.write_str(" "));
self.3.to_css(dest)
}
}
impl ToCss for SpecifiedValue {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
try!(self.0[0].to_css(dest));
for value in self.0.iter().skip(1) {
try!(dest.write_str(" "));
try!(value.to_css(dest));
}
Ok(())
}
}
#[inline]
pub fn get_initial_value() -> computed_value::T {
computed_value::T(Either::Second(0.0), Either::Second(0.0),
Either::Second(0.0), Either::Second(0.0))
}
#[inline]
pub fn get_initial_specified_value() -> SpecifiedValue {
SpecifiedValue(vec![Either::Second(Number::new(0.0))])
}
impl ToComputedValue for SpecifiedValue {
type ComputedValue = computed_value::T;
#[inline]
fn to_computed_value(&self, context: &Context) -> computed_value::T {
let length = self.0.len();
match length {
4 => computed_value::T(self.0[0].to_computed_value(context),
self.0[1].to_computed_value(context),
self.0[2].to_computed_value(context),
self.0[3].to_computed_value(context)),
3 => computed_value::T(self.0[0].to_computed_value(context),
self.0[1].to_computed_value(context),
self.0[2].to_computed_value(context),
self.0[1].to_computed_value(context)),
2 => computed_value::T(self.0[0].to_computed_value(context),
self.0[1].to_computed_value(context),
self.0[0].to_computed_value(context),
self.0[1].to_computed_value(context)),
1 => computed_value::T(self.0[0].to_computed_value(context),
self.0[0].to_computed_value(context),
self.0[0].to_computed_value(context),
self.0[0].to_computed_value(context)),
_ => unreachable!(),
}
}
#[inline]
fn from_computed_value(computed: &computed_value::T) -> Self {
SpecifiedValue(vec![ToComputedValue::from_computed_value(&computed.0),
ToComputedValue::from_computed_value(&computed.1),
ToComputedValue::from_computed_value(&computed.2),
ToComputedValue::from_computed_value(&computed.3)])
}
}
pub fn parse(context: &ParserContext, input: &mut Parser) -> Result<SpecifiedValue, ()> {
let mut values = vec![];
for _ in 0..4 {
let value = input.try(|input| LengthOrNumber::parse_non_negative(context, input));
match value {
Ok(val) => values.push(val),
Err(_) => break,
}
}
if values.len() > 0 {
Ok(SpecifiedValue(values))
} else {
Err(())
}
}
</%helpers:longhand>
${helpers.predefined_type("border-image-outset", "LengthOrNumberRect",
parse_method="parse_non_negative",
initial_value="computed::LengthOrNumber::zero().into()",
initial_specified_value="specified::LengthOrNumber::zero().into()",
spec="https://drafts.csswg.org/css-backgrounds/#border-image-outset",
animation_value_type="none",
boxed=True)}
<%helpers:longhand name="border-image-repeat" animation_value_type="none"
spec="https://drafts.csswg.org/css-backgrounds/#border-image-repeat">