Jan Varga
27b4496049
Add a NumericType field to UnitValue and populate it when constructing unit values. This preserves the numeric type alongside the value and unit string so CSSNumericValue.type() can report the expected type for reified CSSUnitValue objects. WPT coverage is added in a follow-up patch to avoid introducing many temporary test failures. Differential Revision: https://phabricator.services.mozilla.com/D305909
77 lines
1.7 KiB
Rust
77 lines
1.7 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 https://mozilla.org/MPL/2.0/. */
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//! Resolution values:
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//!
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//! https://drafts.csswg.org/css-values/#resolution
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use crate::derives::*;
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use crate::typed_om::{NumericType, NumericValue, ToTyped, TypedValue, UnitValue};
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use crate::values::CSSFloat;
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use std::{
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fmt::{self, Write},
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ops::AddAssign,
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};
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use style_traits::{CssString, CssWriter, ToCss};
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use thin_vec::ThinVec;
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/// A computed `<resolution>`.
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#[repr(C)]
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#[derive(
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Animate,
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Copy,
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Clone,
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Debug,
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Deserialize,
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MallocSizeOf,
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PartialEq,
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PartialOrd,
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Serialize,
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ToAnimatedZero,
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ToResolvedValue,
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ToShmem,
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)]
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pub struct Resolution(CSSFloat);
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impl Resolution {
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/// Returns this resolution value as dppx.
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#[inline]
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pub fn dppx(&self) -> CSSFloat {
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self.0
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}
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/// Return a computed `resolution` value from a dppx float value.
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#[inline]
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pub fn from_dppx(dppx: CSSFloat) -> Self {
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Resolution(dppx)
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}
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}
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impl ToCss for Resolution {
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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: fmt::Write,
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{
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self.dppx().to_css(dest)?;
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dest.write_str("dppx")
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}
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}
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impl ToTyped for Resolution {
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fn to_typed(&self, dest: &mut ThinVec<TypedValue>) -> Result<(), ()> {
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dest.push(TypedValue::Numeric(NumericValue::Unit(UnitValue {
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numeric_type: NumericType::resolution(),
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value: self.dppx(),
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unit: CssString::from("dppx"),
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})));
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Ok(())
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}
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}
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impl AddAssign for Resolution {
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fn add_assign(&mut self, rhs: Self) {
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self.0 += rhs.0
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}
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}
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