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style: Add support for resolving default computed styles.

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This commit is contained in:
Cameron McCormack 2017-05-25 10:46:57 +08:00
parent 1f323f8848
commit cc44f05f44
9 changed files with 2784 additions and 2437 deletions
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25
components/style/gecko/wrapper.rs
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@ -72,6 +72,8 @@ use std::cell::RefCell;
use std::collections::HashMap;
use std::fmt;
use std::hash::{Hash, Hasher};
use std::mem;
use std::ops::DerefMut;
use std::ptr;
use string_cache::{Atom, Namespace, WeakAtom, WeakNamespace};
use stylearc::Arc;
@ -422,6 +424,29 @@ impl<'le> GeckoElement<'le> {
}
}
/// Sets the specified element data, return any existing data.
///
/// Like `ensure_data`, only safe to call with exclusive access to the
/// element.
pub unsafe fn set_data(&self, replace_data: Option<ElementData>) -> Option<ElementData> {
match (self.get_data(), replace_data) {
(Some(old), Some(replace_data)) => {
Some(mem::replace(old.borrow_mut().deref_mut(), replace_data))
}
(Some(old), None) => {
let old_data = mem::replace(old.borrow_mut().deref_mut(), ElementData::new(None));
self.0.mServoData.set(ptr::null_mut());
Some(old_data)
}
(None, Some(replace_data)) => {
let ptr = Box::into_raw(Box::new(AtomicRefCell::new(replace_data)));
self.0.mServoData.set(ptr);
None
}
(None, None) => None,
}
}
#[inline]
fn has_id(&self) -> bool {
self.as_node().get_bool_flag(nsINode_BooleanFlag::ElementHasID)