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Serialize font longhands to -moz-use-system-font when using system font like what Gecko does.

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This commit is contained in:
Xidorn Quan 2017-07-11 16:25:09 +10:00
parent 8fa2a262dc
commit 0e91f033cb
2 changed files with 22 additions and 36 deletions
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13
components/style/properties/helpers.mako.rs
View file

@ -493,8 +493,6 @@
%>
<%call expr="longhand(name, keyword=Keyword(name, values, **keyword_kwargs), **kwargs)">
use properties::longhands::system_font::SystemFont;
use std::fmt;
use style_traits::ToCss;
no_viewport_percentage!(SpecifiedValue);
pub mod computed_value {
@ -517,21 +515,12 @@
${gecko_keyword_conversion(keyword, keyword.values_for(product), type="T", cast_to="i32")}
}
#[derive(Debug, Clone, PartialEq, Eq, Copy)]
#[derive(Debug, Clone, PartialEq, Eq, Copy, ToCss)]
pub enum SpecifiedValue {
Keyword(computed_value::T),
System(SystemFont),
}
impl ToCss for SpecifiedValue {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
match *self {
SpecifiedValue::Keyword(k) => k.to_css(dest),
SpecifiedValue::System(_) => Ok(())
}
}
}
pub fn parse<'i, 't>(_: &ParserContext, input: &mut Parser<'i, 't>) -> Result<SpecifiedValue, ParseError<'i>> {
Ok(SpecifiedValue::Keyword(computed_value::T::parse(input)?))
}

45
components/style/properties/longhand/font.mako.rs
View file

@ -35,16 +35,6 @@ macro_rules! impl_gecko_keyword_conversions {
// Define ToComputedValue, ToCss, and other boilerplate for a specified value
// which is of the form `enum SpecifiedValue {Value(..), System(SystemFont)}`
<%def name="simple_system_boilerplate(name)">
impl ToCss for SpecifiedValue {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
match *self {
SpecifiedValue::Value(ref v) => v.to_css(dest),
SpecifiedValue::System(_) => Ok(())
}
}
}
impl SpecifiedValue {
pub fn system_font(f: SystemFont) -> Self {
SpecifiedValue::System(f)
@ -366,7 +356,7 @@ macro_rules! impl_gecko_keyword_conversions {
}
Ok(())
}
_ => Ok(())
SpecifiedValue::System(sys) => sys.to_css(dest),
}
}
}
@ -434,7 +424,7 @@ ${helpers.single_keyword_system("font-variant-caps",
SpecifiedValue::Bolder => dest.write_str("bolder"),
SpecifiedValue::Lighter => dest.write_str("lighter"),
SpecifiedValue::Weight(weight) => weight.to_css(dest),
SpecifiedValue::System(_) => Ok(())
SpecifiedValue::System(sys) => sys.to_css(dest),
}
}
}
@ -602,7 +592,7 @@ ${helpers.single_keyword_system("font-variant-caps",
SpecifiedValue::Keyword(kw, _) => kw.to_css(dest),
SpecifiedValue::Smaller => dest.write_str("smaller"),
SpecifiedValue::Larger => dest.write_str("larger"),
SpecifiedValue::System(_) => Ok(()),
SpecifiedValue::System(sys) => sys.to_css(dest),
}
}
}
@ -1033,7 +1023,7 @@ ${helpers.single_keyword_system("font-variant-caps",
match *self {
SpecifiedValue::None => dest.write_str("none"),
SpecifiedValue::Number(number) => number.to_css(dest),
SpecifiedValue::System(_) => Ok(()),
SpecifiedValue::System(sys) => sys.to_css(dest),
}
}
}
@ -1272,7 +1262,7 @@ ${helpers.single_keyword_system("font-kerning",
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub struct VariantAlternatesList(pub Box<[VariantAlternates]>);
#[derive(Debug, Clone, PartialEq)]
#[derive(Debug, Clone, PartialEq, ToCss)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
pub enum SpecifiedValue {
Value(VariantAlternatesList),
@ -1481,7 +1471,7 @@ macro_rules! exclusive_value {
}
#[derive(Debug, Clone, PartialEq)]
#[derive(Debug, Clone, PartialEq, ToCss)]
pub enum SpecifiedValue {
Value(VariantEastAsian),
System(SystemFont)
@ -1626,7 +1616,7 @@ macro_rules! exclusive_value {
}
#[derive(Debug, Clone, PartialEq)]
#[derive(Debug, Clone, PartialEq, ToCss)]
pub enum SpecifiedValue {
Value(VariantLigatures),
System(SystemFont)
@ -1785,7 +1775,7 @@ macro_rules! exclusive_value {
#[derive(Debug, Clone, PartialEq)]
#[derive(Debug, Clone, PartialEq, ToCss)]
pub enum SpecifiedValue {
Value(VariantNumeric),
System(SystemFont)
@ -1920,11 +1910,9 @@ ${helpers.single_keyword_system("font-variant-position",
extra_prefixes="moz" boxed="True"
spec="https://drafts.csswg.org/css-fonts/#propdef-font-feature-settings">
use properties::longhands::system_font::SystemFont;
use std::fmt;
use style_traits::ToCss;
use values::generics::FontSettings;
#[derive(Debug, Clone, PartialEq)]
#[derive(Debug, Clone, PartialEq, ToCss)]
pub enum SpecifiedValue {
Value(computed_value::T),
System(SystemFont)
@ -2012,7 +2000,7 @@ https://drafts.csswg.org/css-fonts-4/#low-level-font-variation-settings-control-
match *self {
SpecifiedValue::Normal => dest.write_str("normal"),
SpecifiedValue::Override(ref lang) => lang.to_css(dest),
SpecifiedValue::System(_) => Ok(())
SpecifiedValue::System(sys) => sys.to_css(dest),
}
}
}
@ -2380,8 +2368,9 @@ ${helpers.single_keyword("-moz-math-variant",
//! whenever a font longhand on the same element needs the system font.
use app_units::Au;
use cssparser::Parser;
use cssparser::{Parser, ToCss};
use properties::longhands;
use std::fmt;
use std::hash::{Hash, Hasher};
use style_traits::ParseError;
use values::computed::{ToComputedValue, Context};
@ -2513,6 +2502,14 @@ ${helpers.single_keyword("-moz-math-variant",
}
}
}
impl ToCss for SystemFont {
fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
// We may want to do something better in the future, see
// w3c/csswg-drafts#1586.
dest.write_str("-moz-use-system-font")
}
}
}
% else:
pub mod system_font {
@ -2522,7 +2519,7 @@ ${helpers.single_keyword("-moz-math-variant",
// a lot of code with `if product == gecko` conditionals, we have a
// dummy system font module that does nothing
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, ToCss)]
#[cfg_attr(feature = "servo", derive(HeapSizeOf))]
/// void enum for system font, can never exist
pub enum SystemFont {}