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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* Implementation of DOM Core's Attr node.
*/
#include "mozilla/dom/Attr.h"
#include "mozilla/dom/AttrBinding.h"
#include "mozilla/dom/Element.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsContentCreatorFunctions.h"
#include "nsError.h"
#include "nsUnicharUtils.h"
#include "nsDOMString.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/Document.h"
#include "nsGkAtoms.h"
#include "nsCOMArray.h"
#include "nsNameSpaceManager.h"
#include "nsTextNode.h"
#include "mozAutoDocUpdate.h"
#include "nsWrapperCacheInlines.h"
#include "NodeUbiReporting.h"
namespace mozilla::dom {
//----------------------------------------------------------------------
bool Attr::sInitialized;
Attr::Attr(nsDOMAttributeMap* aAttrMap,
already_AddRefed<dom::NodeInfo>&& aNodeInfo, const nsAString& aValue)
: nsINode(std::move(aNodeInfo)), mAttrMap(aAttrMap), mValue(aValue) {
MOZ_ASSERT(mNodeInfo, "We must get a nodeinfo here!");
MOZ_ASSERT(mNodeInfo->NodeType() == ATTRIBUTE_NODE, "Wrong nodeType");
// We don't add a reference to our content. It will tell us
// to drop our reference when it goes away.
}
NS_IMPL_CYCLE_COLLECTION_CLASS(Attr)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Attr)
if (!nsINode::Traverse(tmp, cb)) {
return NS_SUCCESS_INTERRUPTED_TRAVERSE;
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAttrMap)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Attr)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Attr)
nsINode::Unlink(tmp);
NS_IMPL_CYCLE_COLLECTION_UNLINK(mAttrMap)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Attr)
Element* ownerElement = tmp->GetElement();
if (tmp->HasKnownLiveWrapper()) {
if (ownerElement) {
// The attribute owns the element via attribute map so we can
// mark it when the attribute is certainly alive.
mozilla::dom::FragmentOrElement::MarkNodeChildren(ownerElement);
}
return true;
}
if (ownerElement &&
mozilla::dom::FragmentOrElement::CanSkip(ownerElement, true)) {
return true;
}
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Attr)
return tmp->HasKnownLiveWrapperAndDoesNotNeedTracing(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr)
return tmp->HasKnownLiveWrapper();
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
// QueryInterface implementation for Attr
NS_INTERFACE_TABLE_HEAD(Attr)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE(Attr, nsINode, EventTarget)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(Attr)
NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
new nsNodeSupportsWeakRefTearoff(this))
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(Attr)
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE_AND_DESTROY(Attr,
LastRelease(),
Destroy())
NS_IMPL_DOMARENA_DESTROY(Attr)
void Attr::SetMap(nsDOMAttributeMap* aMap) {
if (mAttrMap && !aMap && sInitialized) {
// We're breaking a relationship with content and not getting a new one,
// need to locally cache value. GetValue() does that.
GetValue(mValue);
}
mAttrMap = aMap;
}
Element* Attr::GetElement() const {
if (!mAttrMap) {
return nullptr;
}
nsIContent* content = mAttrMap->GetContent();
return content ? content->AsElement() : nullptr;
}
nsresult Attr::SetOwnerDocument(Document* aDocument) {
NS_ASSERTION(aDocument, "Missing document");
Document* doc = OwnerDoc();
NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument");
doc->RemoveAllPropertiesFor(this);
RefPtr<dom::NodeInfo> newNodeInfo = aDocument->NodeInfoManager()->GetNodeInfo(
mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(),
mNodeInfo->NamespaceID(), ATTRIBUTE_NODE);
NS_ASSERTION(newNodeInfo, "GetNodeInfo lies");
mNodeInfo.swap(newNodeInfo);
return NS_OK;
}
void Attr::GetName(nsAString& aName) { aName = NodeName(); }
void Attr::GetValue(nsAString& aValue) {
Element* element = GetElement();
if (element) {
RefPtr<nsAtom> nameAtom = mNodeInfo->NameAtom();
element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue);
} else {
aValue = mValue;
}
}
void Attr::SetValue(const nsAString& aValue, nsIPrincipal* aTriggeringPrincipal,
ErrorResult& aRv) {
Element* element = GetElement();
if (!element) {
mValue = aValue;
return;
}
RefPtr<nsAtom> nameAtom = mNodeInfo->NameAtom();
aRv = element->SetAttr(mNodeInfo->NamespaceID(), nameAtom,
mNodeInfo->GetPrefixAtom(), aValue,
aTriggeringPrincipal, true);
}
void Attr::SetValue(const nsAString& aValue, ErrorResult& aRv) {
SetValue(aValue, nullptr, aRv);
}
bool Attr::Specified() const { return true; }
Element* Attr::GetOwnerElement(ErrorResult& aRv) { return GetElement(); }
void Attr::GetNodeValueInternal(nsAString& aNodeValue) { GetValue(aNodeValue); }
void Attr::SetNodeValueInternal(const nsAString& aNodeValue,
ErrorResult& aError) {
SetValue(aNodeValue, nullptr, aError);
}
nsresult Attr::Clone(dom::NodeInfo* aNodeInfo, nsINode** aResult) const {
nsAutoString value;
const_cast<Attr*>(this)->GetValue(value);
*aResult = new (aNodeInfo->NodeInfoManager())
Attr(nullptr, do_AddRef(aNodeInfo), value);
NS_ADDREF(*aResult);
return NS_OK;
}
nsIURI* Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const {
Element* parent = GetElement();
return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI)
: OwnerDoc()->GetBaseURI(aTryUseXHRDocBaseURI);
}
void Attr::GetTextContentInternal(nsAString& aTextContent,
OOMReporter& aError) {
GetValue(aTextContent);
}
void Attr::SetTextContentInternal(const nsAString& aTextContent,
nsIPrincipal* aSubjectPrincipal,
ErrorResult& aError) {
SetNodeValueInternal(aTextContent, aError);
}
bool Attr::IsNodeOfType(uint32_t aFlags) const { return false; }
void Attr::GetEventTargetParent(EventChainPreVisitor& aVisitor) {
aVisitor.mCanHandle = true;
}
void Attr::Initialize() { sInitialized = true; }
void Attr::Shutdown() { sInitialized = false; }
JSObject* Attr::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return Attr_Binding::Wrap(aCx, this, aGivenProto);
}
void Attr::ConstructUbiNode(void* storage) {
JS::ubi::Concrete<Attr>::construct(storage, this);
}
} // namespace mozilla::dom
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