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var() functions in longhands: use a single code path with IDs

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… rather than generating similar code for every longhand property
This commit is contained in:
Simon Sapin 2017-07-12 23:10:57 +02:00
parent 252e52e24e
commit 54f1325a49
2 changed files with 39 additions and 46 deletions
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21
components/style/properties/helpers.mako.rs
View file

@ -452,26 +452,7 @@
}
pub fn parse_declared<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>)
-> Result<PropertyDeclaration, ParseError<'i>> {
input.look_for_var_functions();
let start = input.position();
let specified = parse_specified(context, input);
if specified.is_err() {
while let Ok(_) = input.next() {} // Look for var() after the error.
}
let var = input.seen_var_functions();
if specified.is_err() && var {
input.reset(start);
let (first_token_type, css) =
::custom_properties::parse_non_custom_with_var(input)?;
return Ok(PropertyDeclaration::WithVariables(LonghandId::${property.camel_case},
Arc::new(UnparsedValue {
css: css.into_owned(),
first_token_type: first_token_type,
url_data: context.url_data.clone(),
from_shorthand: None,
})))
}
specified.map(|s| PropertyDeclaration::${property.camel_case}(s))
parse_specified(context, input).map(PropertyDeclaration::${property.camel_case})
}
% endif
}

64
components/style/properties/properties.mako.rs
View file

@ -1521,32 +1521,44 @@ impl PropertyDeclaration {
Ok(())
}
PropertyId::Longhand(id) => {
if let Ok(keyword) = input.try(|i| CSSWideKeyword::parse(context, i)) {
declarations.push(PropertyDeclaration::CSSWideKeyword(id, keyword));
Ok(())
} else {
match id {
% for property in data.longhands:
LonghandId::${property.camel_case} => {
% if not property.derived_from:
match longhands::${property.ident}::parse_declared(context, input) {
Ok(value) => {
declarations.push(value);
Ok(())
},
Err(_) => {
Err(PropertyDeclarationParseError::InvalidValue(
"${property.ident}".into()
))
}
}
% else:
Err(PropertyDeclarationParseError::UnknownProperty)
% endif
}
% endfor
}
}
input.try(|i| CSSWideKeyword::parse(context, i)).map(|keyword| {
PropertyDeclaration::CSSWideKeyword(id, keyword)
}).or_else(|_| {
input.look_for_var_functions();
let start = input.position();
input.parse_entirely(|input| {
match id {
% for property in data.longhands:
LonghandId::${property.camel_case} => {
% if not property.derived_from:
longhands::${property.ident}::parse_declared(context, input)
% else:
Err(PropertyDeclarationParseError::UnknownProperty)
% endif
}
% endfor
}
}).or_else(|_| {
while let Ok(_) = input.next() {} // Look for var() after the error.
if input.seen_var_functions() {
input.reset(start);
let (first_token_type, css) =
::custom_properties::parse_non_custom_with_var(input).map_err(|_| {
PropertyDeclarationParseError::InvalidValue(id.name().into())
})?;
Ok(PropertyDeclaration::WithVariables(id, Arc::new(UnparsedValue {
css: css.into_owned(),
first_token_type: first_token_type,
url_data: context.url_data.clone(),
from_shorthand: None,
})))
} else {
Err(PropertyDeclarationParseError::InvalidValue(id.name().into()))
}
})
}).map(|declaration| {
declarations.push(declaration)
})
}
PropertyId::Shorthand(id) => {
if let Ok(keyword) = input.try(|i| CSSWideKeyword::parse(context, i)) {