Mirrors/servo
1
0
Fork 0
mirror of https://github.com/servo/servo.git synced 2025-08-07 06:25:32 +01:00
Code Issues Projects Releases Packages Wiki Activity

MutationObserver api: Implement takeRecords() and characterData mutations

Browse source
This commit is contained in:
Fabrice Desré 2018-04-24 20:39:28 -07:00
parent c5f7c9ccf3
commit 75434e6fce
9 changed files with 98 additions and 112 deletions
Download patch file Download diff file Expand all files Collapse all files

48
components/script/dom/mutationobserver.rs
View file

@ -30,7 +30,8 @@ pub struct MutationObserver {
}
pub enum Mutation<'a> {
Attribute { name: LocalName, namespace: Namespace, old_value: DOMString },
Attribute { name: LocalName, namespace: Namespace, old_value: Option<DOMString> },
CharacterData { old_value: DOMString },
ChildList { added: Option<&'a [&'a Node]>, removed: Option<&'a [&'a Node]>,
prev: Option<&'a Node>, next: Option<&'a Node> },
}
@ -110,7 +111,8 @@ impl MutationObserver {
return;
}
// Step 1
let mut interestedObservers: Vec<(DomRoot<MutationObserver>, Option<DOMString>)> = vec![];
let mut interested_observers: Vec<(DomRoot<MutationObserver>, Option<DOMString>)> = vec![];
// Step 2 & 3
for node in target.inclusive_ancestors() {
for registered in &*node.registered_mutation_observers() {
@ -135,32 +137,52 @@ impl MutationObserver {
}
// Step 3.1.2
let paired_string = if registered.options.attribute_old_value {
old_value.clone()
} else {
None
};
// Step 3.1.1
let idx = interested_observers.iter().position(|&(ref o, _)|
&**o as *const _ == &*registered.observer as *const _);
if let Some(idx) = idx {
interested_observers[idx].1 = paired_string;
} else {
interested_observers.push((DomRoot::from_ref(&*registered.observer),
paired_string));
}
},
Mutation::CharacterData { ref old_value } => {
if !registered.options.character_data {
continue;
}
// Step 3.1.2
let paired_string = if registered.options.character_data_old_value {
Some(old_value.clone())
} else {
None
};
// Step 3.1.1
let idx = interestedObservers.iter().position(|&(ref o, _)|
let idx = interested_observers.iter().position(|&(ref o, _)|
&**o as *const _ == &*registered.observer as *const _);
if let Some(idx) = idx {
interestedObservers[idx].1 = paired_string;
interested_observers[idx].1 = paired_string;
} else {
interestedObservers.push((DomRoot::from_ref(&*registered.observer),
paired_string));
interested_observers.push((DomRoot::from_ref(&*registered.observer),
paired_string));
}
},
Mutation::ChildList { .. } => {
if !registered.options.child_list {
continue;
}
interestedObservers.push((DomRoot::from_ref(&*registered.observer), None));
interested_observers.push((DomRoot::from_ref(&*registered.observer), None));
}
}
}
}
// Step 4
for &(ref observer, ref paired_string) in &interestedObservers {
for &(ref observer, ref paired_string) in &interested_observers {
// Steps 4.1-4.7
let record = match attr_type {
Mutation::Attribute { ref name, ref namespace, .. } => {
@ -171,6 +193,9 @@ impl MutationObserver {
};
MutationRecord::attribute_mutated(target, name, namespace, paired_string.clone())
},
Mutation::CharacterData { .. } => {
MutationRecord::character_data_mutated(target, paired_string.clone())
}
Mutation::ChildList { ref added, ref removed, ref next, ref prev } => {
MutationRecord::child_list_mutated(target, *added, *removed, *next, *prev)
}
@ -265,4 +290,11 @@ impl MutationObserverMethods for MutationObserver {
Ok(())
}
/// https://dom.spec.whatwg.org/#dom-mutationobserver-takerecords
fn TakeRecords(&self) -> Vec<DomRoot<MutationRecord>> {
let records: Vec<DomRoot<MutationRecord>> = self.record_queue.borrow().clone();
self.record_queue.borrow_mut().clear();
records
}
}