diff options
Diffstat (limited to 'dom/base/Attr.cpp')
| -rw-r--r-- | dom/base/Attr.cpp | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/dom/base/Attr.cpp b/dom/base/Attr.cpp new file mode 100644 index 000000000..6eb3b49fd --- /dev/null +++ b/dom/base/Attr.cpp @@ -0,0 +1,374 @@ +/* -*- 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 nsIDOMAttr 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 "nsContentCreatorFunctions.h" +#include "nsError.h" +#include "nsUnicharUtils.h" +#include "nsDOMString.h" +#include "nsIContentInlines.h" +#include "nsIDocument.h" +#include "nsGkAtoms.h" +#include "nsCOMArray.h" +#include "nsNameSpaceManager.h" +#include "nsNodeUtils.h" +#include "nsTextNode.h" +#include "mozAutoDocUpdate.h" +#include "nsWrapperCacheInlines.h" + +nsIAttribute::nsIAttribute(nsDOMAttributeMap* aAttrMap, + already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo) +: nsINode(aNodeInfo), mAttrMap(aAttrMap) +{ +} + +nsIAttribute::~nsIAttribute() +{ +} + +namespace mozilla { +namespace dom { + +//---------------------------------------------------------------------- +bool Attr::sInitialized; + +Attr::Attr(nsDOMAttributeMap *aAttrMap, + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, + const nsAString &aValue) + : nsIAttribute(aAttrMap, aNodeInfo), mValue(aValue) +{ + MOZ_ASSERT(mNodeInfo, "We must get a nodeinfo here!"); + MOZ_ASSERT(mNodeInfo->NodeType() == nsIDOMNode::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) + NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS + + 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->IsBlack()) { + 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->IsBlackAndDoesNotNeedTracing(static_cast<nsIAttribute*>(tmp)); +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END + +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr) + return tmp->IsBlack(); +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, nsIDOMAttr, nsIAttribute, nsIDOMNode, + nsIDOMEventTarget, 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(Attr, + nsNodeUtils::LastRelease(this)) + +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(nsIDocument* aDocument) +{ + NS_ASSERTION(aDocument, "Missing document"); + + nsIDocument *doc = OwnerDoc(); + NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument"); + doc->DeleteAllPropertiesFor(this); + + RefPtr<mozilla::dom::NodeInfo> newNodeInfo; + newNodeInfo = aDocument->NodeInfoManager()-> + GetNodeInfo(mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(), + mNodeInfo->NamespaceID(), + nsIDOMNode::ATTRIBUTE_NODE); + NS_ASSERTION(newNodeInfo, "GetNodeInfo lies"); + mNodeInfo.swap(newNodeInfo); + + return NS_OK; +} + +NS_IMETHODIMP +Attr::GetName(nsAString& aName) +{ + aName = NodeName(); + return NS_OK; +} + +NS_IMETHODIMP +Attr::GetValue(nsAString& aValue) +{ + Element* element = GetElement(); + if (element) { + nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom(); + element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue); + } + else { + aValue = mValue; + } + + return NS_OK; +} + +void +Attr::SetValue(const nsAString& aValue, ErrorResult& aRv) +{ + Element* element = GetElement(); + if (!element) { + mValue = aValue; + return; + } + + nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom(); + aRv = element->SetAttr(mNodeInfo->NamespaceID(), + nameAtom, + mNodeInfo->GetPrefixAtom(), + aValue, + true); +} + +NS_IMETHODIMP +Attr::SetValue(const nsAString& aValue) +{ + ErrorResult rv; + SetValue(aValue, rv); + return rv.StealNSResult(); +} + +bool +Attr::Specified() const +{ + return true; +} + +NS_IMETHODIMP +Attr::GetSpecified(bool* aSpecified) +{ + NS_ENSURE_ARG_POINTER(aSpecified); + *aSpecified = Specified(); + return NS_OK; +} + +Element* +Attr::GetOwnerElement(ErrorResult& aRv) +{ + return GetElement(); +} + +NS_IMETHODIMP +Attr::GetOwnerElement(nsIDOMElement** aOwnerElement) +{ + NS_ENSURE_ARG_POINTER(aOwnerElement); + + Element* element = GetElement(); + if (element) { + return CallQueryInterface(element, aOwnerElement); + } + + *aOwnerElement = nullptr; + + return NS_OK; +} + +void +Attr::GetNodeValueInternal(nsAString& aNodeValue) +{ + OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue); + + GetValue(aNodeValue); +} + +void +Attr::SetNodeValueInternal(const nsAString& aNodeValue, ErrorResult& aError) +{ + OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue); + + aError = SetValue(aNodeValue); +} + +nsresult +Attr::Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult) const +{ + nsAutoString value; + const_cast<Attr*>(this)->GetValue(value); + + RefPtr<mozilla::dom::NodeInfo> ni = aNodeInfo; + *aResult = new Attr(nullptr, ni.forget(), value); + if (!*aResult) { + return NS_ERROR_OUT_OF_MEMORY; + } + + NS_ADDREF(*aResult); + + return NS_OK; +} + +already_AddRefed<nsIURI> +Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const +{ + Element* parent = GetElement(); + + return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI) : nullptr; +} + +void +Attr::GetTextContentInternal(nsAString& aTextContent, + ErrorResult& aError) +{ + OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent); + + GetValue(aTextContent); +} + +void +Attr::SetTextContentInternal(const nsAString& aTextContent, + ErrorResult& aError) +{ + OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent); + + SetNodeValueInternal(aTextContent, aError); +} + +NS_IMETHODIMP +Attr::GetIsId(bool* aReturn) +{ + *aReturn = mNodeInfo->Equals(nsGkAtoms::id, kNameSpaceID_None); + return NS_OK; +} + +bool +Attr::IsNodeOfType(uint32_t aFlags) const +{ + return !(aFlags & ~eATTRIBUTE); +} + +uint32_t +Attr::GetChildCount() const +{ + return 0; +} + +nsIContent * +Attr::GetChildAt(uint32_t aIndex) const +{ + return nullptr; +} + +nsIContent * const * +Attr::GetChildArray(uint32_t* aChildCount) const +{ + *aChildCount = 0; + return nullptr; +} + +int32_t +Attr::IndexOf(const nsINode* aPossibleChild) const +{ + return -1; +} + +nsresult +Attr::InsertChildAt(nsIContent* aKid, uint32_t aIndex, + bool aNotify) +{ + return NS_ERROR_NOT_IMPLEMENTED; +} + +void +Attr::RemoveChildAt(uint32_t aIndex, bool aNotify) +{ +} + +nsresult +Attr::PreHandleEvent(EventChainPreVisitor& aVisitor) +{ + aVisitor.mCanHandle = true; + return NS_OK; +} + +void +Attr::Initialize() +{ + sInitialized = true; +} + +void +Attr::Shutdown() +{ + sInitialized = false; +} + +JSObject* +Attr::WrapNode(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) +{ + return AttrBinding::Wrap(aCx, this, aGivenProto); +} + +} // namespace dom +} // namespace mozilla |