diff options
Diffstat (limited to 'servo/components/style/values/computed/resolution.rs')
-rw-r--r-- | servo/components/style/values/computed/resolution.rs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/servo/components/style/values/computed/resolution.rs b/servo/components/style/values/computed/resolution.rs new file mode 100644 index 0000000000..54b03bd475 --- /dev/null +++ b/servo/components/style/values/computed/resolution.rs @@ -0,0 +1,56 @@ +/* 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/. */ + +//! Resolution values: +//! +//! https://drafts.csswg.org/css-values/#resolution + +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(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(self.dppx()) + } + + #[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") + } +} |