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Implement MutationObserver childList mutations.

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This commit is contained in:
Imanol Fernandez 2017-05-18 17:06:24 +02:00
parent 864f5509d8
commit 0290e405ce
6 changed files with 112 additions and 119 deletions
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54
components/script/dom/node.rs
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@ -47,7 +47,7 @@ use dom::htmllinkelement::HTMLLinkElement;
use dom::htmlmetaelement::HTMLMetaElement;
use dom::htmlstyleelement::HTMLStyleElement;
use dom::htmltextareaelement::{HTMLTextAreaElement, LayoutHTMLTextAreaElementHelpers};
use dom::mutationobserver::RegisteredObserver;
use dom::mutationobserver::{Mutation, MutationObserver, RegisteredObserver};
use dom::nodelist::NodeList;
use dom::processinginstruction::ProcessingInstruction;
use dom::range::WeakRangeVec;
@ -1616,18 +1616,27 @@ impl Node {
let new_nodes = if let NodeTypeId::DocumentFragment = node.type_id() {
// Step 3.
new_nodes.extend(node.children().map(|kid| JS::from_ref(&*kid)));
// Step 4: mutation observers.
// Step 5.
// Step 4.
for kid in new_nodes.r() {
Node::remove(*kid, node, SuppressObserver::Suppressed);
}
// Step 5.
vtable_for(&node).children_changed(&ChildrenMutation::replace_all(new_nodes.r(), &[]));
let mutation = Mutation::ChildList {
added: None,
removed: Some(new_nodes.r()),
prev: None,
next: None,
};
MutationObserver::queue_a_mutation_record(&node, mutation);
new_nodes.r()
} else {
// Step 3.
ref_slice(&node)
};
// Step 6: mutation observers.
// Step 6.
let previous_sibling = match suppress_observers {
SuppressObserver::Unsuppressed => {
match child {
@ -1646,6 +1655,14 @@ impl Node {
if let SuppressObserver::Unsuppressed = suppress_observers {
vtable_for(&parent).children_changed(
&ChildrenMutation::insert(previous_sibling.r(), new_nodes, child));
let mutation = Mutation::ChildList {
added: Some(new_nodes),
removed: None,
prev: previous_sibling.r(),
next: child,
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
}
@ -1677,9 +1694,19 @@ impl Node {
if let Some(node) = node {
Node::insert(node, parent, None, SuppressObserver::Suppressed);
}
// Step 6: mutation observers.
// Step 6.
vtable_for(&parent).children_changed(
&ChildrenMutation::replace_all(removed_nodes.r(), added_nodes));
if !removed_nodes.is_empty() || !added_nodes.is_empty() {
let mutation = Mutation::ChildList {
added: Some(added_nodes),
removed: Some(removed_nodes.r()),
prev: None,
next: None,
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
}
// https://dom.spec.whatwg.org/#concept-node-pre-remove
@ -1730,6 +1757,15 @@ impl Node {
&ChildrenMutation::replace(old_previous_sibling.r(),
&Some(&node), &[],
old_next_sibling.r()));
let removed = [node];
let mutation = Mutation::ChildList {
added: None,
removed: Some(&removed),
prev: old_previous_sibling.r(),
next: old_next_sibling.r(),
};
MutationObserver::queue_a_mutation_record(&parent, mutation);
}
}
@ -2182,6 +2218,14 @@ impl NodeMethods for Node {
&ChildrenMutation::replace(previous_sibling.r(),
&removed_child, nodes,
reference_child));
let removed = removed_child.map(|r| [r]);
let mutation = Mutation::ChildList {
added: Some(nodes),
removed: removed.as_ref().map(|r| &r[..]),
prev: previous_sibling.r(),
next: reference_child,
};
MutationObserver::queue_a_mutation_record(&self, mutation);
// Step 15.
Ok(Root::from_ref(child))