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Support CSS-wide keywords in custom properties

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This commit is contained in:
Simon Sapin 2015-07-22 21:19:37 +02:00
parent 65d4ecaa39
commit 3fcd8938f3
2 changed files with 47 additions and 22 deletions
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39
components/style/custom_properties.rs
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@ -3,6 +3,7 @@
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use cssparser::{Parser, Token};
use properties::DeclaredValue;
use std::collections::{HashMap, HashSet};
use std::sync::Arc;
use string_cache::Atom;
@ -111,19 +112,33 @@ fn parse_var_function<'i, 't>(input: &mut Parser<'i, 't>, references: &mut HashS
/// Add one custom property declaration to a map,
/// unless another with the same name was already there.
pub fn cascade(custom_properties: &mut Option<Map>, inherited_custom_properties: &Option<Arc<Map>>,
name: &Atom, value: &Value) {
let map = match *custom_properties {
Some(ref mut map) => map,
None => {
*custom_properties = Some(match *inherited_custom_properties {
Some(ref arc) => (**arc).clone(),
None => HashMap::new(),
});
custom_properties.as_mut().unwrap()
pub fn cascade<'a>(custom_properties: &mut Option<Map>,
inherited_custom_properties: &Option<Arc<Map>>,
seen: &mut HashSet<&'a Atom>,
name: &'a Atom,
value: &DeclaredValue<Value>) {
let was_not_already_present = seen.insert(name);
if was_not_already_present {
let map = match *custom_properties {
Some(ref mut map) => map,
None => {
*custom_properties = Some(match *inherited_custom_properties {
Some(ref arc) => (**arc).clone(),
None => HashMap::new(),
});
custom_properties.as_mut().unwrap()
}
};
match *value {
DeclaredValue::SpecifiedValue(ref value) => {
map.insert(name.clone(), value.clone());
}
DeclaredValue::Initial => {
map.remove(name);
}
DeclaredValue::Inherit => {} // The inherited value is what we already have.
}
};
map.entry(name.clone()).or_insert(value.clone());
}
}
/// If any custom property declarations where found for this element (`custom_properties.is_some()`)