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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
//! Resolution values:
//!
use crate::values::computed::{Context, ToComputedValue};
use crate::values::specified;
use crate::values::CSSFloat;
use std::fmt::{self, Write};
use style_traits::{CssWriter, ToCss};
/// A computed `<resolution>`.
#[repr(C)]
#[derive(Animate, Clone, Debug, MallocSizeOf, PartialEq, ToResolvedValue, ToShmem)]
pub struct Resolution(CSSFloat);
impl Resolution {
/// Returns this resolution value as dppx.
#[inline]
pub fn dppx(&self) -> CSSFloat {
self.0
}
/// Return a computed `resolution` value from a dppx float value.
#[inline]
pub fn from_dppx(dppx: CSSFloat) -> Self {
Resolution(dppx)
}
}
impl ToComputedValue for specified::Resolution {
type ComputedValue = Resolution;
#[inline]
fn to_computed_value(&self, _: &Context) -> Self::ComputedValue {
Resolution(crate::values::normalize(self.dppx().max(0.0)))
}
#[inline]
fn from_computed_value(computed: &Self::ComputedValue) -> Self {
specified::Resolution::from_dppx(computed.dppx())
}
}
impl ToCss for Resolution {
fn to_css<W>(&self, dest: &mut CssWriter<W>) -> fmt::Result
where
W: fmt::Write,
{
self.dppx().to_css(dest)?;
dest.write_str("dppx")
}
}