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script: Add a function to check whether a node is before another one in DOM order.

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Signed-off-by: Emilio Cobos Álvarez <emilio@crisal.io>
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Emilio Cobos Álvarez 2017-08-17 10:19:09 +02:00
parent 4304a1d054
commit f6bfd44ad6
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1 changed files with 11 additions and 0 deletions
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11
components/script/dom/node.rs
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@ -385,6 +385,17 @@ impl Node {
} }
} }
/// Returns true if this node is before `other` in the same connected DOM
/// tree.
pub fn is_before(&self, other: &Node) -> bool {
let cmp = other.CompareDocumentPosition(self);
if cmp & NodeConstants::DOCUMENT_POSITION_DISCONNECTED != 0 {
return false;
}
cmp & NodeConstants::DOCUMENT_POSITION_PRECEDING != 0
}
/// Return all registered mutation observers for this node. /// Return all registered mutation observers for this node.
pub fn registered_mutation_observers(&self) -> RefMut<Vec<RegisteredObserver>> { pub fn registered_mutation_observers(&self) -> RefMut<Vec<RegisteredObserver>> {
self.mutation_observers.borrow_mut() self.mutation_observers.borrow_mut()