servo/components/style/values/specified/motion.rs
2019-04-12 12:20:09 +02:00

75 lines
2.2 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 https://mozilla.org/MPL/2.0/. */
//! Specified types for CSS values that are related to motion path.
use crate::parser::{Parse, ParserContext};
use crate::values::specified::SVGPathData;
use cssparser::Parser;
use style_traits::{ParseError, StyleParseErrorKind};
/// The offset-path value.
///
/// https://drafts.fxtf.org/motion-1/#offset-path-property
#[derive(
Animate,
Clone,
ComputeSquaredDistance,
Debug,
MallocSizeOf,
PartialEq,
SpecifiedValueInfo,
ToAnimatedZero,
ToComputedValue,
ToCss,
ToResolvedValue,
ToShmem,
)]
pub enum OffsetPath {
// We could merge SVGPathData into ShapeSource, so we could reuse them. However,
// we don't want to support other value for offset-path, so use SVGPathData only for now.
/// Path value for path(<string>).
#[css(function)]
Path(SVGPathData),
/// None value.
#[animation(error)]
None,
// Bug 1186329: Implement ray(), <basic-shape>, <geometry-box>, and <url>.
}
impl OffsetPath {
/// Return None.
#[inline]
pub fn none() -> Self {
OffsetPath::None
}
}
impl Parse for OffsetPath {
fn parse<'i, 't>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
) -> Result<Self, ParseError<'i>> {
// Parse none.
if input.try(|i| i.expect_ident_matching("none")).is_ok() {
return Ok(OffsetPath::none());
}
// Parse possible functions.
let location = input.current_source_location();
let function = input.expect_function()?.clone();
input.parse_nested_block(move |i| {
match_ignore_ascii_case! { &function,
// Bug 1186329: Implement the parser for ray(), <basic-shape>, <geometry-box>,
// and <url>.
"path" => SVGPathData::parse(context, i).map(OffsetPath::Path),
_ => {
Err(location.new_custom_error(
StyleParseErrorKind::UnexpectedFunction(function.clone())
))
},
}
})
}
}