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98 lines
2.9 KiB
Rust
98 lines
2.9 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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//! Common [values][values] used in CSS.
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//!
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//! [values]: https://drafts.csswg.org/css-values/
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pub use cssparser::RGBA;
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use app_units::Au;
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use cssparser::CssStringWriter;
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use std::fmt::{self, Write};
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use url::Url;
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macro_rules! define_numbered_css_keyword_enum {
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($name: ident: $( $css: expr => $variant: ident = $value: expr ),+,) => {
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define_numbered_css_keyword_enum!($name: $( $css => $variant = $value ),+);
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};
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($name: ident: $( $css: expr => $variant: ident = $value: expr ),+) => {
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#[allow(non_camel_case_types)]
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#[derive(Clone, Eq, PartialEq, PartialOrd, Ord, Copy, RustcEncodable, Debug)]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf, Deserialize, Serialize))]
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pub enum $name {
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$( $variant = $value ),+
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}
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impl $name {
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pub fn parse(input: &mut ::cssparser::Parser) -> Result<$name, ()> {
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match_ignore_ascii_case! { try!(input.expect_ident()),
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$( $css => Ok($name::$variant), )+
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_ => Err(())
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}
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}
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}
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impl ::cssparser::ToCss for $name {
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fn to_css<W>(&self, dest: &mut W) -> ::std::fmt::Result
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where W: ::std::fmt::Write {
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match *self {
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$( $name::$variant => dest.write_str($css) ),+
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}
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}
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}
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}
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}
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pub mod computed;
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pub mod specified;
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/// The real ToCss trait can't be implemented for types in crates that don't
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/// depend on each other.
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pub trait LocalToCss {
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/// Serialize `self` in CSS syntax, writing to `dest`.
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write;
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/// Serialize `self` in CSS syntax and return a string.
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///
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/// (This is a convenience wrapper for `to_css` and probably should not be overridden.)
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#[inline]
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fn to_css_string(&self) -> String {
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let mut s = String::new();
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self.to_css(&mut s).unwrap();
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s
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}
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}
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impl LocalToCss for Au {
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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write!(dest, "{}px", self.to_f64_px())
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}
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}
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impl LocalToCss for Url {
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fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
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try!(dest.write_str("url(\""));
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try!(write!(CssStringWriter::new(dest), "{}", self));
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try!(dest.write_str("\")"));
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Ok(())
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}
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}
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pub type CSSFloat = f32;
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pub const FONT_MEDIUM_PX: i32 = 16;
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pub trait HasViewportPercentage {
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fn has_viewport_percentage(&self) -> bool;
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}
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pub trait NoViewportPercentage {}
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impl<T> HasViewportPercentage for T where T: NoViewportPercentage {
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fn has_viewport_percentage(&self) -> bool {
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false
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}
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}
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