mirror of
https://github.com/servo/servo.git
synced 2025-06-21 23:59:00 +01:00
126 lines
3.4 KiB
Rust
126 lines
3.4 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/. */
|
|
|
|
//! Generic types for CSS values that are composed of four sides.
|
|
|
|
use crate::parser::{Parse, ParserContext};
|
|
use cssparser::Parser;
|
|
use std::fmt::{self, Write};
|
|
use style_traits::{CssWriter, ParseError, ToCss};
|
|
|
|
/// A CSS value made of four components, where its `ToCss` impl will try to
|
|
/// serialize as few components as possible, like for example in `border-width`.
|
|
#[derive(
|
|
Animate,
|
|
Clone,
|
|
ComputeSquaredDistance,
|
|
Copy,
|
|
Debug,
|
|
MallocSizeOf,
|
|
PartialEq,
|
|
SpecifiedValueInfo,
|
|
ToAnimatedValue,
|
|
ToAnimatedZero,
|
|
ToComputedValue,
|
|
ToResolvedValue,
|
|
ToShmem,
|
|
)]
|
|
#[repr(C)]
|
|
pub struct Rect<T>(pub T, pub T, pub T, pub T);
|
|
|
|
impl<T> Rect<T> {
|
|
/// Returns a new `Rect<T>` value.
|
|
pub fn new(first: T, second: T, third: T, fourth: T) -> Self {
|
|
Rect(first, second, third, fourth)
|
|
}
|
|
}
|
|
|
|
impl<T> Rect<T>
|
|
where
|
|
T: Clone,
|
|
{
|
|
/// Returns a rect with all the values equal to `v`.
|
|
pub fn all(v: T) -> Self {
|
|
Rect::new(v.clone(), v.clone(), v.clone(), v)
|
|
}
|
|
|
|
/// Parses a new `Rect<T>` value with the given parse function.
|
|
pub fn parse_with<'i, 't, Parse>(
|
|
context: &ParserContext,
|
|
input: &mut Parser<'i, 't>,
|
|
parse: Parse,
|
|
) -> Result<Self, ParseError<'i>>
|
|
where
|
|
Parse: Fn(&ParserContext, &mut Parser<'i, 't>) -> Result<T, ParseError<'i>>,
|
|
{
|
|
let first = parse(context, input)?;
|
|
let second = if let Ok(second) = input.try(|i| parse(context, i)) {
|
|
second
|
|
} else {
|
|
// <first>
|
|
return Ok(Self::new(
|
|
first.clone(),
|
|
first.clone(),
|
|
first.clone(),
|
|
first,
|
|
));
|
|
};
|
|
let third = if let Ok(third) = input.try(|i| parse(context, i)) {
|
|
third
|
|
} else {
|
|
// <first> <second>
|
|
return Ok(Self::new(first.clone(), second.clone(), first, second));
|
|
};
|
|
let fourth = if let Ok(fourth) = input.try(|i| parse(context, i)) {
|
|
fourth
|
|
} else {
|
|
// <first> <second> <third>
|
|
return Ok(Self::new(first, second.clone(), third, second));
|
|
};
|
|
// <first> <second> <third> <fourth>
|
|
Ok(Self::new(first, second, third, fourth))
|
|
}
|
|
}
|
|
|
|
impl<T> Parse for Rect<T>
|
|
where
|
|
T: Clone + Parse,
|
|
{
|
|
#[inline]
|
|
fn parse<'i, 't>(
|
|
context: &ParserContext,
|
|
input: &mut Parser<'i, 't>,
|
|
) -> Result<Self, ParseError<'i>> {
|
|
Self::parse_with(context, input, T::parse)
|
|
}
|
|
}
|
|
|
|
impl<T> ToCss for Rect<T>
|
|
where
|
|
T: PartialEq + ToCss,
|
|
{
|
|
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
|
|
where
|
|
W: Write,
|
|
{
|
|
self.0.to_css(dest)?;
|
|
let same_vertical = self.0 == self.2;
|
|
let same_horizontal = self.1 == self.3;
|
|
if same_vertical && same_horizontal && self.0 == self.1 {
|
|
return Ok(());
|
|
}
|
|
dest.write_str(" ")?;
|
|
self.1.to_css(dest)?;
|
|
if same_vertical && same_horizontal {
|
|
return Ok(());
|
|
}
|
|
dest.write_str(" ")?;
|
|
self.2.to_css(dest)?;
|
|
if same_horizontal {
|
|
return Ok(());
|
|
}
|
|
dest.write_str(" ")?;
|
|
self.3.to_css(dest)
|
|
}
|
|
}
|