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Bug 1334051 - Part 2: Invoke attributeChangedCallback only if attribute name is in the observed attribute list.

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We call attributeChangedCallback in two cases:

1. When any of the attributes in the observed attribute list has changed, appended, removed, or replaced.

2. When upgrading an element, for each attribute in element's attribute list that is in the observed attribute list.

Note: w/ Fixup for not implementing an API Enhancement Bug 1363481.

Tag UXP Issue #1344
This commit is contained in:
Gaming4JC 2020-01-05 12:13:14 -05:00 • committed by Roy Tam
commit 2bd8be69ea
10 changed files with 222 additions and 71 deletions
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119
dom/base/CustomElementRegistry.cpp
View file

@ -434,8 +434,27 @@ CustomElementRegistry::EnqueueLifecycleCallback(nsIDocument::ElementCallbackType
LifecycleCallbackArgs* aArgs,
CustomElementDefinition* aDefinition)
{
RefPtr<CustomElementData> elementData = aCustomElement->GetCustomElementData();
MOZ_ASSERT(elementData, "CustomElementData should exist");
// Let DEFINITION be ELEMENT's definition
CustomElementDefinition* definition = aDefinition;
if (!definition) {
mozilla::dom::NodeInfo* info = aCustomElement->NodeInfo();
// Make sure we get the correct definition in case the element
// is a extended custom element e.g. <button is="x-button">.
nsCOMPtr<nsIAtom> typeAtom = elementData ?
elementData->mType.get() : info->NameAtom();
definition = mCustomDefinitions.Get(typeAtom);
if (!definition || definition->mLocalName != info->NameAtom()) {
return;
}
}
auto callback =
CreateCustomElementCallback(aType, aCustomElement, aArgs, aDefinition);
CreateCustomElementCallback(aType, aCustomElement, aArgs, definition);
if (!callback) {
return;
}
@ -445,9 +464,17 @@ CustomElementRegistry::EnqueueLifecycleCallback(nsIDocument::ElementCallbackType
return;
}
if (aType == nsIDocument::eAttributeChanged) {
nsCOMPtr<nsIAtom> attrName = NS_Atomize(aArgs->name);
if (definition->mObservedAttributes.IsEmpty() ||
!definition->mObservedAttributes.Contains(attrName)) {
return;
}
}
CustomElementReactionsStack* reactionsStack =
docGroup->CustomElementReactionsStack();
reactionsStack->EnqueueCallbackReaction(this, aCustomElement, aDefinition,
reactionsStack->EnqueueCallbackReaction(this, aCustomElement, definition,
Move(callback));
}
@ -657,6 +684,7 @@ CustomElementRegistry::Define(const nsAString& aName,
JS::Rooted<JSObject*> constructorPrototype(cx);
nsAutoPtr<LifecycleCallbacks> callbacksHolder(new LifecycleCallbacks());
nsCOMArray<nsIAtom> observedAttributes;
{ // Set mIsCustomDefinitionRunning.
/**
* 9. Set this CustomElementRegistry's element definition is running flag.
@ -718,6 +746,14 @@ CustomElementRegistry::Define(const nsAString& aName,
return;
}
// Note: We call the init from the constructorProtoUnwrapped's compartment
// here.
JS::RootedValue rootedv(cx, JS::ObjectValue(*constructorProtoUnwrapped));
if (!JS_WrapValue(cx, &rootedv) || !callbacksHolder->Init(cx, rootedv)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
/**
* 10.5. Let observedAttributes be an empty sequence<DOMString>.
* 10.6. If the value of the entry in lifecycleCallbacks with key
@ -730,14 +766,45 @@ CustomElementRegistry::Define(const nsAString& aName,
* any exceptions from the conversion.
*/
// TODO: Bug 1293921 - Implement connected/disconnected/adopted/attributeChanged lifecycle callbacks for custom elements
if (callbacksHolder->mAttributeChangedCallback.WasPassed()) {
// Enter constructor's compartment.
JSAutoCompartment ac(cx, constructor);
JS::Rooted<JS::Value> observedAttributesIterable(cx);
// Note: We call the init from the constructorProtoUnwrapped's compartment
// here.
JS::RootedValue rootedv(cx, JS::ObjectValue(*constructorProtoUnwrapped));
if (!JS_WrapValue(cx, &rootedv) || !callbacksHolder->Init(cx, rootedv)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
if (!JS_GetProperty(cx, constructor, "observedAttributes",
&observedAttributesIterable)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
if (!observedAttributesIterable.isUndefined()) {
JS::ForOfIterator iter(cx);
if (!iter.init(observedAttributesIterable)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
JS::Rooted<JS::Value> attribute(cx);
while (true) {
bool done;
if (!iter.next(&attribute, &done)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
if (done) {
break;
}
JSString *attrJSStr = attribute.toString();
nsAutoJSString attrStr;
if (!attrStr.init(cx, attrJSStr)) {
aRv.StealExceptionFromJSContext(cx);
return;
}
observedAttributes.AppendElement(NS_Atomize(attrStr));
}
}
} // Leave constructor's compartment.
} // Leave constructorProtoUnwrapped's compartment.
} // Unset mIsCustomDefinitionRunning
@ -754,6 +821,7 @@ CustomElementRegistry::Define(const nsAString& aName,
new CustomElementDefinition(nameAtom,
localNameAtom,
&aFunctionConstructor,
Move(observedAttributes),
constructorPrototype,
callbacks,
0 /* TODO dependent on HTML imports. Bug 877072 */);
@ -878,8 +946,35 @@ CustomElementRegistry::Upgrade(Element* aElement,
return;
}
// Step 3 and Step 4.
// TODO: Bug 1334051 - Implement list of observed attributes for custom elements' attributeChanged callbacks
// Step 3.
if (!aDefinition->mObservedAttributes.IsEmpty()) {
uint32_t count = aElement->GetAttrCount();
for (uint32_t i = 0; i < count; i++) {
mozilla::dom::BorrowedAttrInfo info = aElement->GetAttrInfoAt(i);
const nsAttrName* name = info.mName;
nsIAtom* attrName = name->LocalName();
if (aDefinition->IsInObservedAttributeList(attrName)) {
int32_t namespaceID = name->NamespaceID();
nsAutoString attrValue, namespaceURI;
info.mValue->ToString(attrValue);
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(namespaceID,
namespaceURI);
LifecycleCallbackArgs args = {
nsDependentAtomString(attrName),
NullString(),
(attrValue.IsEmpty() ? NullString() : attrValue),
(namespaceURI.IsEmpty() ? NullString() : namespaceURI)
};
EnqueueLifecycleCallback(nsIDocument::eAttributeChanged, aElement,
&args, aDefinition);
}
}
}
// Step 4.
// TODO: Bug 1334043 - Implement connected lifecycle callbacks for custom elements
// Step 5.
@ -1051,12 +1146,14 @@ CustomElementReactionsStack::InvokeReactions(ElementQueue* aElementQueue,
CustomElementDefinition::CustomElementDefinition(nsIAtom* aType,
nsIAtom* aLocalName,
Function* aConstructor,
nsCOMArray<nsIAtom>&& aObservedAttributes,
JSObject* aPrototype,
LifecycleCallbacks* aCallbacks,
uint32_t aDocOrder)
: mType(aType),
mLocalName(aLocalName),
mConstructor(new CustomElementConstructor(aConstructor)),
mObservedAttributes(Move(aObservedAttributes)),
mPrototype(aPrototype),
mCallbacks(aCallbacks),
mDocOrder(aDocOrder)

16
dom/base/CustomElementRegistry.h
View file

@ -128,6 +128,7 @@ struct CustomElementDefinition
CustomElementDefinition(nsIAtom* aType,
nsIAtom* aLocalName,
Function* aConstructor,
nsCOMArray<nsIAtom>&& aObservedAttributes,
JSObject* aPrototype,
mozilla::dom::LifecycleCallbacks* aCallbacks,
uint32_t aDocOrder);
@ -141,6 +142,9 @@ struct CustomElementDefinition
// The custom element constructor.
RefPtr<CustomElementConstructor> mConstructor;
// The list of attributes that this custom element observes.
nsCOMArray<nsIAtom> mObservedAttributes;
// The prototype to use for new custom elements of this type.
JS::Heap<JSObject *> mPrototype;
@ -153,9 +157,19 @@ struct CustomElementDefinition
// The document custom element order.
uint32_t mDocOrder;
bool IsCustomBuiltIn() {
bool IsCustomBuiltIn()
{
return mType != mLocalName;
}
bool IsInObservedAttributeList(nsIAtom* aName)
{
if (mObservedAttributes.IsEmpty()) {
return false;
}
return mObservedAttributes.Contains(aName);
}
};
class CustomElementReaction

69
dom/base/Element.cpp
View file

@ -2586,23 +2586,29 @@ Element::SetAttrAndNotify(int32_t aNamespaceID,
UpdateState(aNotify);
nsIDocument* ownerDoc = OwnerDoc();
if (ownerDoc && GetCustomElementData()) {
nsCOMPtr<nsIAtom> oldValueAtom = oldValue->GetAsAtom();
nsCOMPtr<nsIAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom();
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
if (nsContentUtils::IsWebComponentsEnabled()) {
if (CustomElementData* data = GetCustomElementData()) {
if (CustomElementDefinition* definition =
nsContentUtils::GetElementDefinitionIfObservingAttr(this,
data->mType,
aName)) {
nsCOMPtr<nsIAtom> oldValueAtom = oldValue->GetAsAtom();
nsCOMPtr<nsIAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom();
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
LifecycleCallbackArgs args = {
nsDependentAtomString(aName),
aModType == nsIDOMMutationEvent::ADDITION ?
NullString() : nsDependentAtomString(oldValueAtom),
nsDependentAtomString(newValueAtom),
(ns.IsEmpty() ? NullString() : ns)
};
LifecycleCallbackArgs args = {
nsDependentAtomString(aName),
aModType == nsIDOMMutationEvent::ADDITION ?
NullString() : nsDependentAtomString(oldValueAtom),
nsDependentAtomString(newValueAtom),
(ns.IsEmpty() ? NullString() : ns)
};
nsContentUtils::EnqueueLifecycleCallback(
ownerDoc, nsIDocument::eAttributeChanged, this, &args);
nsContentUtils::EnqueueLifecycleCallback(
OwnerDoc(), nsIDocument::eAttributeChanged, this, &args, definition);
}
}
}
if (aCallAfterSetAttr) {
@ -2847,20 +2853,27 @@ Element::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aName,
UpdateState(aNotify);
nsIDocument* ownerDoc = OwnerDoc();
if (ownerDoc && GetCustomElementData()) {
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
nsCOMPtr<nsIAtom> oldValueAtom = oldValue.GetAsAtom();
LifecycleCallbackArgs args = {
nsDependentAtomString(aName),
nsDependentAtomString(oldValueAtom),
NullString(),
(ns.IsEmpty() ? NullString() : ns)
};
if (nsContentUtils::IsWebComponentsEnabled()) {
if (CustomElementData* data = GetCustomElementData()) {
if (CustomElementDefinition* definition =
nsContentUtils::GetElementDefinitionIfObservingAttr(this,
data->mType,
aName)) {
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
nsContentUtils::EnqueueLifecycleCallback(
ownerDoc, nsIDocument::eAttributeChanged, this, &args);
nsCOMPtr<nsIAtom> oldValueAtom = oldValue.GetAsAtom();
LifecycleCallbackArgs args = {
nsDependentAtomString(aName),
nsDependentAtomString(oldValueAtom),
NullString(),
(ns.IsEmpty() ? NullString() : ns)
};
nsContentUtils::EnqueueLifecycleCallback(
OwnerDoc(), nsIDocument::eAttributeChanged, this, &args, definition);
}
}
}
if (aNotify) {

22
dom/base/nsContentUtils.cpp
View file

@ -9637,6 +9637,28 @@ nsContentUtils::SetupCustomElement(Element* aElement,
return registry->SetupCustomElement(aElement, aTypeExtension);
}
/* static */ CustomElementDefinition*
nsContentUtils::GetElementDefinitionIfObservingAttr(Element* aCustomElement,
nsIAtom* aExtensionType,
nsIAtom* aAttrName)
{
nsString extType = nsDependentAtomString(aExtensionType);
NodeInfo *ni = aCustomElement->NodeInfo();
CustomElementDefinition* definition =
LookupCustomElementDefinition(aCustomElement->OwnerDoc(), ni->LocalName(),
ni->NamespaceID(),
extType.IsEmpty() ? nullptr : &extType);
// Custom element not defined yet or attribute is not in the observed
// attribute list.
if (!definition || !definition->IsInObservedAttributeList(aAttrName)) {
return nullptr;
}
return definition;
}
/* static */ void
nsContentUtils::EnqueueLifecycleCallback(nsIDocument* aDoc,
nsIDocument::ElementCallbackType aType,

5
dom/base/nsContentUtils.h
View file

@ -2723,6 +2723,11 @@ public:
static void SetupCustomElement(Element* aElement,
const nsAString* aTypeExtension = nullptr);
static mozilla::dom::CustomElementDefinition*
GetElementDefinitionIfObservingAttr(Element* aCustomElement,
nsIAtom* aExtensionType,
nsIAtom* aAttrName);
static void EnqueueLifecycleCallback(nsIDocument* aDoc,
nsIDocument::ElementCallbackType aType,
Element* aCustomElement,

3
dom/tests/mochitest/webcomponents/mochitest.ini
View file

@ -19,6 +19,7 @@ support-files =
htmlconstructor_builtin_tests.js
[test_custom_element_import_node_created_callback.html]
[test_custom_element_in_shadow.html]
skip-if = true || stylo # disabled - See bug 1390396 and 1293844
[test_custom_element_register_invalid_callbacks.html]
[test_custom_element_get.html]
[test_custom_element_when_defined.html]
@ -33,8 +34,10 @@ support-files =
[test_document_register.html]
[test_document_register_base_queue.html]
[test_document_register_lifecycle.html]
skip-if = true # disabled - See bug 1390396
[test_document_register_parser.html]
[test_document_register_stack.html]
skip-if = true # disabled - See bug 1390396
[test_document_shared_registry.html]
[test_event_dispatch.html]
[test_event_retarget.html]