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102 lines
3.6 KiB
Rust
102 lines
3.6 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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//! Various macro helpers.
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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, missing_docs)]
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#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
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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 $crate::parser::Parse for $name {
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#[allow(missing_docs)]
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fn parse(_context: &$crate::parser::ParserContext, 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 ::style_traits::values::ToCss for $name {
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fn to_css<W>(&self, dest: &mut W) -> ::std::fmt::Result
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where W: ::std::fmt::Write,
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{
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match *self {
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$( $name::$variant => dest.write_str($css) ),+
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}
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}
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}
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}
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}
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/// A macro for implementing `ComputedValueAsSpecified`, `Parse`
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/// and `HasViewportPercentage` traits for the enums defined
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/// using `define_css_keyword_enum` macro.
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///
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/// NOTE: We should either move `Parse` trait to `style_traits`
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/// or `define_css_keyword_enum` macro to this crate, but that
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/// may involve significant cleanup in both the crates.
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macro_rules! add_impls_for_keyword_enum {
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($name:ident) => {
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impl $crate::parser::Parse for $name {
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#[inline]
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fn parse(_context: &$crate::parser::ParserContext,
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input: &mut ::cssparser::Parser)
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-> Result<Self, ()> {
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$name::parse(input)
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}
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}
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impl $crate::values::computed::ComputedValueAsSpecified for $name {}
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no_viewport_percentage!($name);
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};
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}
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macro_rules! define_keyword_type {
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($name: ident, $css: expr) => {
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#[derive(Clone, PartialEq, Copy)]
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#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
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#[allow(missing_docs)]
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pub struct $name;
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impl ::style_traits::ToCss for $name {
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fn to_css<W>(&self, dest: &mut W) -> ::std::fmt::Result where W: ::std::fmt::Write {
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write!(dest, $css)
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}
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}
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impl $crate::properties::animated_properties::Animatable for $name {
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#[inline]
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fn add_weighted(&self, _other: &Self, _self_progress: f64, _other_progress: f64)
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-> Result<Self, ()> {
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Ok($name)
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}
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}
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impl fmt::Debug for $name {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, $css)
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}
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}
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impl $crate::parser::Parse for $name {
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fn parse(_context: &$crate::parser::ParserContext,
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input: &mut ::cssparser::Parser)
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-> Result<$name, ()> {
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input.expect_ident_matching($css).map(|_| $name)
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}
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}
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impl $crate::values::computed::ComputedValueAsSpecified for $name {}
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no_viewport_percentage!($name);
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};
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}
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