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stylo: Add helpers for converting Gecko keywords to Servo, use to support keyword pres attrs

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This commit is contained in:
Manish Goregaokar 2017-02-12 16:02:29 -08:00 • committed by Manish Goregaokar
parent afccbf4a8c
commit b85e1f5f0c
10 changed files with 145 additions and 21 deletions
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57
components/style/properties/helpers.mako.rs
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@ -376,7 +376,44 @@
</%call>
</%def>
<%def name="single_keyword_computed(name, values, vector=False, extra_specified=None, **kwargs)">
<%def name="gecko_keyword_conversion(keyword, values=None, type='SpecifiedValue')">
<%
if not values:
values = keyword.values_for(product)
%>
#[cfg(feature = "gecko")]
impl ${type} {
/// Obtain a specified value from a Gecko keyword value
///
/// Intended for use with presentation attributes, not style structs
pub fn from_gecko_keyword(kw: u32) -> Self {
use gecko_bindings::structs;
% if keyword.gecko_enum_prefix:
% for value in values:
// We can't match on enum values if we're matching on a u32
const ${to_rust_ident(value).upper()}: u32
= structs::${keyword.gecko_enum_prefix}::${to_camel_case(value)} as u32;
% endfor
match kw {
% for value in values:
${to_rust_ident(value).upper()} => ${type}::${to_rust_ident(value)},
% endfor
x => panic!("Found unexpected value in style struct for ${keyword.name} property: {:?}", x),
}
% else:
match kw {
% for value in values:
structs::${keyword.gecko_constant(value)} => ${type}::${to_rust_ident(value)},
% endfor
x => panic!("Found unexpected value in style struct for ${keyword.name} property: {:?}", x),
}
% endif
}
}
</%def>
<%def name="single_keyword_computed(name, values, vector=False,
extra_specified=None, needs_conversion=False, **kwargs)">
<%
keyword_kwargs = {a: kwargs.pop(a, None) for a in [
'gecko_constant_prefix', 'gecko_enum_prefix',
@ -385,11 +422,11 @@
]}
%>
<%def name="inner_body()">
<%def name="inner_body(keyword, extra_specified=None, needs_conversion=False)">
% if extra_specified:
use style_traits::ToCss;
define_css_keyword_enum! { SpecifiedValue:
% for value in data.longhands_by_name[name].keyword.values_for(product) + extra_specified.split():
% for value in keyword.values_for(product) + extra_specified.split():
"${value}" => ${to_rust_ident(value)},
% endfor
}
@ -424,15 +461,25 @@
SpecifiedValue::parse(input)
}
}
% if needs_conversion:
<%
conversion_values = keyword.values_for(product)
if extra_specified:
conversion_values += extra_specified.split()
%>
${gecko_keyword_conversion(keyword, values=conversion_values)}
% endif
</%def>
% if vector:
<%call expr="vector_longhand(name, keyword=Keyword(name, values, **keyword_kwargs), **kwargs)">
${inner_body()}
${inner_body(Keyword(name, values, **keyword_kwargs))}
${caller.body()}
</%call>
% else:
<%call expr="longhand(name, keyword=Keyword(name, values, **keyword_kwargs), **kwargs)">
${inner_body()}
${inner_body(Keyword(name, values, **keyword_kwargs),
extra_specified=extra_specified, needs_conversion=needs_conversion)}
${caller.body()}
</%call>
% endif