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7fe7b2ffb1
Most of types just derive it using proc_macro directly. Some of value types need manual impl. In my current plan, this new trait will be used in bug 1434130 to expose values as well. Bug: 1455576 Reviewed-by: emilio MozReview-Commit-ID: LI7fy45VkRw
99 lines
2.6 KiB
Rust
99 lines
2.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Generic type for CSS properties that are composed by two dimensions.
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use cssparser::Parser;
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use euclid::Size2D;
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use parser::ParserContext;
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use std::fmt::{self, Write};
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use style_traits::{CssWriter, ParseError, SpecifiedValueInfo, ToCss};
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use values::animated::ToAnimatedValue;
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/// A generic size, for `border-*-radius` longhand properties, or
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/// `border-spacing`.
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#[derive(Animate, Clone, ComputeSquaredDistance, Copy, Debug, MallocSizeOf, PartialEq,
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ToAnimatedZero, ToComputedValue)]
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pub struct Size<L>(pub Size2D<L>);
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impl<L> Size<L> {
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#[inline]
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/// Create a new `Size` for an area of given width and height.
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pub fn new(width: L, height: L) -> Size<L> {
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Size(Size2D::new(width, height))
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}
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/// Returns the width component.
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pub fn width(&self) -> &L {
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&self.0.width
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}
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/// Returns the height component.
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pub fn height(&self) -> &L {
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&self.0.height
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}
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/// Parse a `Size` with a given parsing function.
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pub fn parse_with<'i, 't, F>(
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context: &ParserContext,
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input: &mut Parser<'i, 't>,
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parse_one: F,
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) -> Result<Self, ParseError<'i>>
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where
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L: Clone,
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F: Fn(&ParserContext, &mut Parser<'i, 't>) -> Result<L, ParseError<'i>>,
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{
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let first = parse_one(context, input)?;
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let second = input
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.try(|i| parse_one(context, i))
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.unwrap_or_else(|_| first.clone());
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Ok(Self::new(first, second))
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}
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}
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impl<L> ToCss for Size<L>
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where
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L: ToCss + PartialEq,
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{
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fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
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where
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W: Write,
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{
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self.0.width.to_css(dest)?;
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if self.0.height != self.0.width {
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dest.write_str(" ")?;
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self.0.height.to_css(dest)?;
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}
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Ok(())
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}
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}
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impl<L> ToAnimatedValue for Size<L>
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where
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L: ToAnimatedValue,
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{
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type AnimatedValue = Size<L::AnimatedValue>;
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#[inline]
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fn to_animated_value(self) -> Self::AnimatedValue {
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Size(Size2D::new(
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self.0.width.to_animated_value(),
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self.0.height.to_animated_value(),
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))
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}
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#[inline]
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fn from_animated_value(animated: Self::AnimatedValue) -> Self {
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Size(Size2D::new(
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L::from_animated_value(animated.0.width),
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L::from_animated_value(animated.0.height),
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))
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}
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}
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impl<L: SpecifiedValueInfo> SpecifiedValueInfo for Size<L> {
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const SUPPORTED_TYPES: u8 = L::SUPPORTED_TYPES;
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}
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