servo/components/style/values/specified/box.rs
Emilio Cobos Álvarez 328f142f38
style: Cleanup a bit the scroll-snap-type properties.
Still not perfect, but at least a bit more consistent.
2017-10-25 20:12:37 +02:00

119 lines
3.8 KiB
Rust

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! Specified types for box properties.
use Atom;
use cssparser::Parser;
use parser::{Parse, ParserContext};
use std::fmt;
use style_traits::{ParseError, ToCss};
use values::KeyframesName;
use values::generics::box_::AnimationIterationCount as GenericAnimationIterationCount;
use values::generics::box_::VerticalAlign as GenericVerticalAlign;
use values::specified::{AllowQuirks, Number};
use values::specified::length::LengthOrPercentage;
/// A specified value for the `vertical-align` property.
pub type VerticalAlign = GenericVerticalAlign<LengthOrPercentage>;
impl Parse for VerticalAlign {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
if let Ok(lop) = input.try(|i| LengthOrPercentage::parse_quirky(context, i, AllowQuirks::Yes)) {
return Ok(GenericVerticalAlign::Length(lop));
}
try_match_ident_ignore_ascii_case! { input,
"baseline" => Ok(GenericVerticalAlign::Baseline),
"sub" => Ok(GenericVerticalAlign::Sub),
"super" => Ok(GenericVerticalAlign::Super),
"top" => Ok(GenericVerticalAlign::Top),
"text-top" => Ok(GenericVerticalAlign::TextTop),
"middle" => Ok(GenericVerticalAlign::Middle),
"bottom" => Ok(GenericVerticalAlign::Bottom),
"text-bottom" => Ok(GenericVerticalAlign::TextBottom),
#[cfg(feature = "gecko")]
"-moz-middle-with-baseline" => {
Ok(GenericVerticalAlign::MozMiddleWithBaseline)
},
}
}
}
/// https://drafts.csswg.org/css-animations/#animation-iteration-count
pub type AnimationIterationCount = GenericAnimationIterationCount<Number>;
impl Parse for AnimationIterationCount {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut ::cssparser::Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
if input.try(|input| input.expect_ident_matching("infinite")).is_ok() {
return Ok(GenericAnimationIterationCount::Infinite)
}
let number = Number::parse_non_negative(context, input)?;
Ok(GenericAnimationIterationCount::Number(number))
}
}
impl AnimationIterationCount {
/// Returns the value `1.0`.
#[inline]
pub fn one() -> Self {
GenericAnimationIterationCount::Number(Number::new(1.0))
}
}
/// A value for the `animation-name` property.
#[derive(Clone, Debug, Eq, Hash, MallocSizeOf, PartialEq, ToComputedValue)]
pub struct AnimationName(pub Option<KeyframesName>);
impl AnimationName {
/// Get the name of the animation as an `Atom`.
pub fn as_atom(&self) -> Option<&Atom> {
self.0.as_ref().map(|n| n.as_atom())
}
/// Returns the `none` value.
pub fn none() -> Self {
AnimationName(None)
}
}
impl ToCss for AnimationName {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result
where
W: fmt::Write,
{
match self.0 {
Some(ref name) => name.to_css(dest),
None => dest.write_str("none"),
}
}
}
impl Parse for AnimationName {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>
) -> Result<Self, ParseError<'i>> {
if let Ok(name) = input.try(|input| KeyframesName::parse(context, input)) {
return Ok(AnimationName(Some(name)));
}
input.expect_ident_matching("none")?;
Ok(AnimationName(None))
}
}
define_css_keyword_enum! { ScrollSnapType:
"none" => None,
"mandatory" => Mandatory,
"proximity" => Proximity,
}
add_impls_for_keyword_enum!(ScrollSnapType);