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Introduce concept of composed parent node

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This commit is contained in:
Fernando Jiménez Moreno 2019-01-29 11:00:14 +01:00
parent 1b036355ce
commit c48ad0ff7e
1 changed files with 12 additions and 1 deletions
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13
components/script/dom/node.rs
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@ -108,6 +108,9 @@ pub struct Node {
/// The parent of this node.
parent_node: MutNullableDom<Node>,
/// The parent of this node, ignoring shadow roots.
composed_parent_node: MutNullableDom<Node>,
/// The first child of this node.
first_child: MutNullableDom<Node>,
@ -240,6 +243,7 @@ impl Node {
/// Fails unless `new_child` is disconnected from the tree.
fn add_child(&self, new_child: &Node, before: Option<&Node>) {
assert!(new_child.parent_node.get().is_none());
assert!(new_child.composed_parent_node.get().is_none());
assert!(new_child.prev_sibling.get().is_none());
assert!(new_child.next_sibling.get().is_none());
match before {
@ -275,6 +279,11 @@ impl Node {
}
new_child.parent_node.set(Some(self));
if let Some(shadow_root) = self.downcast::<ShadowRoot>() {
new_child.composed_parent_node.set(Some(shadow_root.Host().upcast::<Node>()));
} else {
new_child.composed_parent_node.set(Some(self));
}
self.children_count.set(self.children_count.get() + 1);
let parent_in_doc = self.is_in_doc();
@ -341,6 +350,7 @@ impl Node {
child.prev_sibling.set(None);
child.next_sibling.set(None);
child.parent_node.set(None);
child.composed_parent_node.set(None);
self.children_count.set(self.children_count.get() - 1);
for node in child.traverse_preorder() {
@ -599,7 +609,7 @@ impl Node {
match self.type_id() {
NodeTypeId::CharacterData(CharacterDataTypeId::Text(TextTypeId::Text)) => self
.parent_node
.composed_parent_node
.get()
.unwrap()
.downcast::<Element>()
@ -1581,6 +1591,7 @@ impl Node {
eventtarget: EventTarget::new_inherited(),
parent_node: Default::default(),
composed_parent_node: Default::default(),
first_child: Default::default(),
last_child: Default::default(),
next_sibling: Default::default(),