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style: Add a StylesheetLoader abstraction, and make it a no-op on Geckolib.

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Emilio Cobos Álvarez 2016-12-16 12:10:05 +01:00
parent 444fef164e
commit a42cfae153
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GPG key ID: 056B727BB9C1027C
9 changed files with 62 additions and 6 deletions
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18
components/style/stylesheets.rs
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@ -307,6 +307,7 @@ impl CssRule {
let mut rule_parser = TopLevelRuleParser {
stylesheet_origin: parent_stylesheet.origin,
context: context,
loader: None,
state: Cell::new(state),
namespaces: &mut namespaces,
};
@ -605,9 +606,20 @@ rule_filter! {
effective_keyframes_rules(Keyframes => KeyframesRule),
}
/// The stylesheet loader is the abstraction used to trigger network requests
/// for `@import` rules.
pub trait StylesheetLoader {
/// Request a stylesheet after parsing a given `@import` rule.
///
/// The called code is responsible to update the `stylesheet` rules field
/// when the sheet is done loading.
fn request_stylesheet(&self, import: &Arc<RwLock<ImportRule>>);
}
struct TopLevelRuleParser<'a> {
stylesheet_origin: Origin,
namespaces: &'a mut Namespaces,
loader: Option<&'a StylesheetLoader>,
context: ParserContext<'a>,
state: Cell<State>,
}
@ -679,6 +691,12 @@ impl<'a> AtRuleParser for TopLevelRuleParser<'a> {
}
));
if is_valid_url {
let loader = self.loader
.expect("Expected a stylesheet loader for @import");
loader.request_stylesheet(&import_rule);
}
return Ok(AtRuleType::WithoutBlock(CssRule::Import(import_rule)))
} else {
self.state.set(State::Invalid);