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style: Introduce CustomPropertiesBuilder.

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I'm about to introduce more state here to implement optimizations for custom
property cascading, so this abstraction is useful to encapsulate that state.
This commit is contained in:
Emilio Cobos Álvarez 2017-10-08 14:58:14 +02:00
parent 47efcd5e52
commit d0f080d5dd
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GPG key ID: 056B727BB9C1027C
4 changed files with 73 additions and 63 deletions
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18
components/style/properties/declaration_block.rs
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@ -9,6 +9,7 @@
use context::QuirksMode;
use cssparser::{DeclarationListParser, parse_important, ParserInput, CowRcStr};
use cssparser::{Parser, AtRuleParser, DeclarationParser, Delimiter, ParseError as CssParseError};
use custom_properties::CustomPropertiesBuilder;
use error_reporting::{ParseErrorReporter, ContextualParseError};
use parser::{ParserContext, ParserErrorContext};
use properties::animated_properties::AnimationValue;
@ -691,24 +692,15 @@ impl PropertyDeclarationBlock {
&self,
inherited_custom_properties: Option<&Arc<::custom_properties::CustomPropertiesMap>>,
) -> Option<Arc<::custom_properties::CustomPropertiesMap>> {
let mut custom_properties = None;
let mut seen_custom = PrecomputedHashSet::default();
let mut builder = CustomPropertiesBuilder::new(inherited_custom_properties);
for declaration in self.normal_declaration_iter() {
if let PropertyDeclaration::Custom(ref name, ref value) = *declaration {
::custom_properties::cascade(
&mut custom_properties,
inherited_custom_properties,
&mut seen_custom,
name,
value.borrow(),
);
builder.cascade(name, value.borrow());
}
}
::custom_properties::finish_cascade(
custom_properties,
inherited_custom_properties,
)
builder.build()
}
}