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-rw-r--r--components/script/dom/mutationobserver.rs128
1 files changed, 86 insertions, 42 deletions
diff --git a/components/script/dom/mutationobserver.rs b/components/script/dom/mutationobserver.rs
index 65f8081c900..57f5cf80168 100644
--- a/components/script/dom/mutationobserver.rs
+++ b/components/script/dom/mutationobserver.rs
@@ -31,10 +31,20 @@ pub struct MutationObserver {
}
pub enum Mutation<'a> {
- 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> },
+ 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>,
+ },
}
#[derive(JSTraceable, MallocSizeOf)]
@@ -69,7 +79,10 @@ impl MutationObserver {
}
}
- pub fn Constructor(global: &Window, callback: Rc<MutationCallback>) -> Fallible<DomRoot<MutationObserver>> {
+ pub fn Constructor(
+ global: &Window,
+ callback: Rc<MutationCallback>,
+ ) -> Fallible<DomRoot<MutationObserver>> {
global.set_exists_mut_observer();
let observer = MutationObserver::new(global, callback);
ScriptThread::add_mutation_observer(&*observer);
@@ -101,7 +114,9 @@ impl MutationObserver {
mo.record_queue.borrow_mut().clear();
// TODO: Step 5.3 Remove all transient registered observers whose observer is mo.
if !queue.is_empty() {
- let _ = mo.callback.Call_(&**mo, queue, &**mo, ExceptionHandling::Report);
+ let _ = mo
+ .callback
+ .Call_(&**mo, queue, &**mo, ExceptionHandling::Report);
}
}
// TODO: Step 6 (slot signals)
@@ -123,7 +138,11 @@ impl MutationObserver {
}
match attr_type {
- Mutation::Attribute { ref name, ref namespace, ref old_value } => {
+ Mutation::Attribute {
+ ref name,
+ ref namespace,
+ ref old_value,
+ } => {
// Step 3.1
if !registered.options.attributes {
continue;
@@ -132,8 +151,12 @@ impl MutationObserver {
if *namespace != ns!() {
continue;
}
- if !registered.options.attribute_filter.iter()
- .any(|s| &**s == &**name) {
+ if !registered
+ .options
+ .attribute_filter
+ .iter()
+ .any(|s| &**s == &**name)
+ {
continue;
}
}
@@ -144,13 +167,14 @@ impl MutationObserver {
None
};
// Step 3.1.1
- let idx = interested_observers.iter().position(|&(ref o, _)|
- &**o as *const _ == &*registered.observer as *const _);
+ 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));
+ interested_observers
+ .push((DomRoot::from_ref(&*registered.observer), paired_string));
}
},
Mutation::CharacterData { ref old_value } => {
@@ -164,13 +188,14 @@ impl MutationObserver {
None
};
// Step 3.1.1
- let idx = interested_observers.iter().position(|&(ref o, _)|
- &**o as *const _ == &*registered.observer as *const _);
+ 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));
+ interested_observers
+ .push((DomRoot::from_ref(&*registered.observer), paired_string));
}
},
Mutation::ChildList { .. } => {
@@ -178,7 +203,7 @@ impl MutationObserver {
continue;
}
interested_observers.push((DomRoot::from_ref(&*registered.observer), None));
- }
+ },
}
}
}
@@ -187,7 +212,11 @@ impl MutationObserver {
for (observer, paired_string) in interested_observers {
// Steps 4.1-4.7
let record = match attr_type {
- Mutation::Attribute { ref name, ref namespace, .. } => {
+ Mutation::Attribute {
+ ref name,
+ ref namespace,
+ ..
+ } => {
let namespace = if *namespace != ns!() {
Some(namespace)
} else {
@@ -197,10 +226,13 @@ impl MutationObserver {
},
Mutation::CharacterData { .. } => {
MutationRecord::character_data_mutated(target, paired_string)
- }
- Mutation::ChildList { ref added, ref removed, ref next, ref prev } => {
- MutationRecord::child_list_mutated(target, *added, *removed, *next, *prev)
- }
+ },
+ Mutation::ChildList {
+ ref added,
+ ref removed,
+ ref next,
+ ref prev,
+ } => MutationRecord::child_list_mutated(target, *added, *removed, *next, *prev),
};
// Step 4.8
observer.record_queue.borrow_mut().push(record);
@@ -209,7 +241,6 @@ impl MutationObserver {
// Step 5
MutationObserver::queue_mutation_observer_compound_microtask();
}
-
}
impl MutationObserverMethods for MutationObserver {
@@ -225,7 +256,8 @@ impl MutationObserverMethods for MutationObserver {
// Step 1
if (options.attributeOldValue.is_some() || options.attributeFilter.is_some()) &&
- options.attributes.is_none() {
+ options.attributes.is_none()
+ {
attributes = true;
}
@@ -236,29 +268,39 @@ impl MutationObserverMethods for MutationObserver {
// Step 3
if !child_list && !attributes && !character_data {
- return Err(Error::Type("One of childList, attributes, or characterData must be true".into()));
+ return Err(Error::Type(
+ "One of childList, attributes, or characterData must be true".into(),
+ ));
}
// Step 4
if attribute_old_value && !attributes {
- return Err(Error::Type("attributeOldValue is true but attributes is false".into()));
+ return Err(Error::Type(
+ "attributeOldValue is true but attributes is false".into(),
+ ));
}
// Step 5
if options.attributeFilter.is_some() && !attributes {
- return Err(Error::Type("attributeFilter is present but attributes is false".into()));
+ return Err(Error::Type(
+ "attributeFilter is present but attributes is false".into(),
+ ));
}
// Step 6
if character_data_old_value && !character_data {
- return Err(Error::Type("characterDataOldValue is true but characterData is false".into()));
+ return Err(Error::Type(
+ "characterDataOldValue is true but characterData is false".into(),
+ ));
}
// Step 7
let add_new_observer = {
let mut replaced = false;
for registered in &mut *target.registered_mutation_observers() {
- if &*registered.observer as *const MutationObserver != self as *const MutationObserver {
+ if &*registered.observer as *const MutationObserver !=
+ self as *const MutationObserver
+ {
continue;
}
// TODO: remove matching transient registered observers
@@ -276,18 +318,20 @@ impl MutationObserverMethods for MutationObserver {
// Step 8
if add_new_observer {
- target.registered_mutation_observers().push(RegisteredObserver {
- observer: DomRoot::from_ref(self),
- options: ObserverOptions {
- attributes,
- attribute_old_value,
- character_data,
- character_data_old_value,
- subtree,
- attribute_filter,
- child_list
- },
- });
+ target
+ .registered_mutation_observers()
+ .push(RegisteredObserver {
+ observer: DomRoot::from_ref(self),
+ options: ObserverOptions {
+ attributes,
+ attribute_old_value,
+ character_data,
+ character_data_old_value,
+ subtree,
+ attribute_filter,
+ child_list,
+ },
+ });
self.node_list.borrow_mut().push(DomRoot::from_ref(target));
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-27 17:08:37 +0000