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/* 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
//! Generic type for CSS properties that are composed by two dimensions.
use crate::parser::ParserContext;
use crate::Zero;
use cssparser::Parser;
use std::fmt::{self, Write};
use style_traits::{CssWriter, ParseError, ToCss};
/// A generic size, for `border-*-radius` longhand properties, or
/// `border-spacing`.
#[derive(
Animate,
Clone,
ComputeSquaredDistance,
Copy,
Debug,
Deserialize,
MallocSizeOf,
PartialEq,
SpecifiedValueInfo,
Serialize,
ToAnimatedZero,
ToAnimatedValue,
ToComputedValue,
ToResolvedValue,
ToShmem,
)]
#[allow(missing_docs)]
#[repr(C)]
pub struct Size2D<L> {
pub width: L,
pub height: L,
}
impl<L> Size2D<L> {
#[inline]
/// Create a new `Size2D` for an area of given width and height.
pub fn new(width: L, height: L) -> Self {
Self { width, height }
}
/// Returns the width component.
pub fn width(&self) -> &L {
&self.width
}
/// Returns the height component.
pub fn height(&self) -> &L {
&self.height
}
/// Parse a `Size2D` with a given parsing function.
pub fn parse_with<'i, 't, F>(
context: &ParserContext,
input: &mut Parser<'i, 't>,
parse_one: F,
) -> Result<Self, ParseError<'i>>
where
L: Clone,
F: Fn(&ParserContext, &mut Parser<'i, 't>) -> Result<L, ParseError<'i>>,
{
let first = parse_one(context, input)?;
let second = input
.try_parse(|i| parse_one(context, i))
.unwrap_or_else(|_| first.clone());
Ok(Self::new(first, second))
}
}
impl<L> ToCss for Size2D<L>
where
L: ToCss + PartialEq,
{
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: Write,
{
self.width.to_css(dest)?;
if self.height != self.width {
dest.write_char(' ')?;
self.height.to_css(dest)?;
}
Ok(())
}
}
impl<L: Zero> Zero for Size2D<L> {
fn zero() -> Self {
Self::new(L::zero(), L::zero())
}
fn is_zero(&self) -> bool {
self.width.is_zero() && self.height.is_zero()
}
}