michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0:  * Implementation of DOM Core's nsIDOMAttr node.
michael@0:  */
michael@0: 
michael@0: #include "mozilla/dom/Attr.h"
michael@0: #include "mozilla/dom/AttrBinding.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "mozilla/EventDispatcher.h"
michael@0: #include "mozilla/InternalMutationEvent.h"
michael@0: #include "nsContentCreatorFunctions.h"
michael@0: #include "nsError.h"
michael@0: #include "nsUnicharUtils.h"
michael@0: #include "nsDOMString.h"
michael@0: #include "nsIContentInlines.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsIDOMUserDataHandler.h"
michael@0: #include "nsGkAtoms.h"
michael@0: #include "nsCOMArray.h"
michael@0: #include "nsNameSpaceManager.h"
michael@0: #include "nsNodeUtils.h"
michael@0: #include "nsTextNode.h"
michael@0: #include "mozAutoDocUpdate.h"
michael@0: #include "nsWrapperCacheInlines.h"
michael@0: 
michael@0: nsIAttribute::nsIAttribute(nsDOMAttributeMap* aAttrMap,
michael@0:                            already_AddRefed<nsINodeInfo>& aNodeInfo,
michael@0:                            bool aNsAware)
michael@0: : nsINode(aNodeInfo), mAttrMap(aAttrMap), mNsAware(aNsAware)
michael@0: {
michael@0: }
michael@0: 
michael@0: nsIAttribute::~nsIAttribute()
michael@0: {
michael@0: }
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: //----------------------------------------------------------------------
michael@0: bool Attr::sInitialized;
michael@0: 
michael@0: Attr::Attr(nsDOMAttributeMap *aAttrMap,
michael@0:            already_AddRefed<nsINodeInfo>&& aNodeInfo,
michael@0:            const nsAString  &aValue, bool aNsAware)
michael@0:   : nsIAttribute(aAttrMap, aNodeInfo, aNsAware), mValue(aValue)
michael@0: {
michael@0:   NS_ABORT_IF_FALSE(mNodeInfo, "We must get a nodeinfo here!");
michael@0:   NS_ABORT_IF_FALSE(mNodeInfo->NodeType() == nsIDOMNode::ATTRIBUTE_NODE,
michael@0:                     "Wrong nodeType");
michael@0: 
michael@0:   // We don't add a reference to our content. It will tell us
michael@0:   // to drop our reference when it goes away.
michael@0: 
michael@0:   SetIsDOMBinding();
michael@0: }
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CLASS(Attr)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Attr)
michael@0:   NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
michael@0: 
michael@0:   if (!nsINode::Traverse(tmp, cb)) {
michael@0:     return NS_SUCCESS_INTERRUPTED_TRAVERSE;
michael@0:   }
michael@0:   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mAttrMap)
michael@0: NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(Attr)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Attr)
michael@0:   nsINode::Unlink(tmp);
michael@0:   NS_IMPL_CYCLE_COLLECTION_UNLINK(mAttrMap)
michael@0: NS_IMPL_CYCLE_COLLECTION_UNLINK_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(Attr)
michael@0:   Element* ownerElement = tmp->GetElement();
michael@0:   if (tmp->IsBlack()) {
michael@0:     if (ownerElement) {
michael@0:       // The attribute owns the element via attribute map so we can
michael@0:       // mark it when the attribute is certainly alive.
michael@0:       mozilla::dom::FragmentOrElement::MarkNodeChildren(ownerElement);
michael@0:     }
michael@0:     return true;
michael@0:   }
michael@0:   if (ownerElement &&
michael@0:       mozilla::dom::FragmentOrElement::CanSkip(ownerElement, true)) {
michael@0:     return true;
michael@0:   }
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(Attr)
michael@0:   return tmp->IsBlackAndDoesNotNeedTracing(static_cast<nsIAttribute*>(tmp));
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(Attr)
michael@0:   return tmp->IsBlack();
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
michael@0: 
michael@0: // QueryInterface implementation for Attr
michael@0: NS_INTERFACE_TABLE_HEAD(Attr)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0:   NS_INTERFACE_TABLE(Attr, nsINode, nsIDOMAttr, nsIAttribute, nsIDOMNode,
michael@0:                      nsIDOMEventTarget, EventTarget)
michael@0:   NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(Attr)
michael@0:   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsISupportsWeakReference,
michael@0:                                  new nsNodeSupportsWeakRefTearoff(this))
michael@0:   NS_INTERFACE_MAP_ENTRY_TEAROFF(nsIDOMXPathNSResolver,
michael@0:                                  new nsNode3Tearoff(this))
michael@0: NS_INTERFACE_MAP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(Attr)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(Attr,
michael@0:                                                    nsNodeUtils::LastRelease(this))
michael@0: 
michael@0: void
michael@0: Attr::SetMap(nsDOMAttributeMap *aMap)
michael@0: {
michael@0:   if (mAttrMap && !aMap && sInitialized) {
michael@0:     // We're breaking a relationship with content and not getting a new one,
michael@0:     // need to locally cache value. GetValue() does that.
michael@0:     GetValue(mValue);
michael@0:   }
michael@0: 
michael@0:   mAttrMap = aMap;
michael@0: }
michael@0: 
michael@0: Element*
michael@0: Attr::GetElement() const
michael@0: {
michael@0:   if (!mAttrMap) {
michael@0:     return nullptr;
michael@0:   }
michael@0:   nsIContent* content = mAttrMap->GetContent();
michael@0:   return content ? content->AsElement() : nullptr;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: Attr::SetOwnerDocument(nsIDocument* aDocument)
michael@0: {
michael@0:   NS_ASSERTION(aDocument, "Missing document");
michael@0: 
michael@0:   nsIDocument *doc = OwnerDoc();
michael@0:   NS_ASSERTION(doc != aDocument, "bad call to Attr::SetOwnerDocument");
michael@0:   doc->DeleteAllPropertiesFor(this);
michael@0: 
michael@0:   nsCOMPtr<nsINodeInfo> newNodeInfo;
michael@0:   newNodeInfo = aDocument->NodeInfoManager()->
michael@0:     GetNodeInfo(mNodeInfo->NameAtom(), mNodeInfo->GetPrefixAtom(),
michael@0:                 mNodeInfo->NamespaceID(),
michael@0:                 nsIDOMNode::ATTRIBUTE_NODE);
michael@0:   NS_ASSERTION(newNodeInfo, "GetNodeInfo lies");
michael@0:   mNodeInfo.swap(newNodeInfo);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::GetName(nsAString& aName)
michael@0: {
michael@0:   aName = NodeName();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: already_AddRefed<nsIAtom>
michael@0: Attr::GetNameAtom(nsIContent* aContent)
michael@0: {
michael@0:   if (!mNsAware &&
michael@0:       mNodeInfo->NamespaceID() == kNameSpaceID_None &&
michael@0:       aContent->IsInHTMLDocument() &&
michael@0:       aContent->IsHTML()) {
michael@0:     nsString name;
michael@0:     mNodeInfo->GetName(name);
michael@0:     nsAutoString lowercaseName;
michael@0:     nsContentUtils::ASCIIToLower(name, lowercaseName);
michael@0:     return do_GetAtom(lowercaseName);
michael@0:   }
michael@0:   nsCOMPtr<nsIAtom> nameAtom = mNodeInfo->NameAtom();
michael@0:   return nameAtom.forget();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::GetValue(nsAString& aValue)
michael@0: {
michael@0:   Element* element = GetElement();
michael@0:   if (element) {
michael@0:     nsCOMPtr<nsIAtom> nameAtom = GetNameAtom(element);
michael@0:     element->GetAttr(mNodeInfo->NamespaceID(), nameAtom, aValue);
michael@0:   }
michael@0:   else {
michael@0:     aValue = mValue;
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::SetValue(const nsAString& aValue, ErrorResult& aRv)
michael@0: {
michael@0:   Element* element = GetElement();
michael@0:   if (!element) {
michael@0:     mValue = aValue;
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIAtom> nameAtom = GetNameAtom(element);
michael@0:   aRv = element->SetAttr(mNodeInfo->NamespaceID(),
michael@0:                          nameAtom,
michael@0:                          mNodeInfo->GetPrefixAtom(),
michael@0:                          aValue,
michael@0:                          true);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::SetValue(const nsAString& aValue)
michael@0: {
michael@0:   ErrorResult rv;
michael@0:   SetValue(aValue, rv);
michael@0:   return rv.ErrorCode();
michael@0: }
michael@0: 
michael@0: bool
michael@0: Attr::Specified() const
michael@0: {
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::GetSpecified(bool* aSpecified)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aSpecified);
michael@0:   *aSpecified = Specified();
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: Element*
michael@0: Attr::GetOwnerElement(ErrorResult& aRv)
michael@0: {
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
michael@0:   return GetElement();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::GetOwnerElement(nsIDOMElement** aOwnerElement)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aOwnerElement);
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eOwnerElement);
michael@0: 
michael@0:   Element* element = GetElement();
michael@0:   if (element) {
michael@0:     return CallQueryInterface(element, aOwnerElement);
michael@0:   }
michael@0: 
michael@0:   *aOwnerElement = nullptr;
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::GetNodeValueInternal(nsAString& aNodeValue)
michael@0: {
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
michael@0: 
michael@0:   GetValue(aNodeValue);
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::SetNodeValueInternal(const nsAString& aNodeValue, ErrorResult& aError)
michael@0: {
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eNodeValue);
michael@0: 
michael@0:   aError = SetValue(aNodeValue);
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: Attr::Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const
michael@0: {
michael@0:   nsAutoString value;
michael@0:   const_cast<Attr*>(this)->GetValue(value);
michael@0: 
michael@0:   nsCOMPtr<nsINodeInfo> ni = aNodeInfo;
michael@0:   *aResult = new Attr(nullptr, ni.forget(), value, mNsAware);
michael@0:   if (!*aResult) {
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0:   }
michael@0: 
michael@0:   NS_ADDREF(*aResult);
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: already_AddRefed<nsIURI>
michael@0: Attr::GetBaseURI(bool aTryUseXHRDocBaseURI) const
michael@0: {
michael@0:   Element* parent = GetElement();
michael@0: 
michael@0:   return parent ? parent->GetBaseURI(aTryUseXHRDocBaseURI) : nullptr;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::GetTextContentInternal(nsAString& aTextContent)
michael@0: {
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
michael@0: 
michael@0:   GetValue(aTextContent);
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::SetTextContentInternal(const nsAString& aTextContent,
michael@0:                              ErrorResult& aError)
michael@0: {
michael@0:   OwnerDoc()->WarnOnceAbout(nsIDocument::eTextContent);
michael@0: 
michael@0:   SetNodeValueInternal(aTextContent, aError);
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: Attr::GetIsId(bool* aReturn)
michael@0: {
michael@0:   Element* element = GetElement();
michael@0:   if (!element) {
michael@0:     *aReturn = false;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   nsIAtom* idAtom = element->GetIDAttributeName();
michael@0:   if (!idAtom) {
michael@0:     *aReturn = false;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   *aReturn = mNodeInfo->Equals(idAtom, kNameSpaceID_None);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: bool
michael@0: Attr::IsNodeOfType(uint32_t aFlags) const
michael@0: {
michael@0:     return !(aFlags & ~eATTRIBUTE);
michael@0: }
michael@0: 
michael@0: uint32_t
michael@0: Attr::GetChildCount() const
michael@0: {
michael@0:   return 0;
michael@0: }
michael@0: 
michael@0: nsIContent *
michael@0: Attr::GetChildAt(uint32_t aIndex) const
michael@0: {
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: nsIContent * const *
michael@0: Attr::GetChildArray(uint32_t* aChildCount) const
michael@0: {
michael@0:   *aChildCount = 0;
michael@0:   return nullptr;
michael@0: }
michael@0: 
michael@0: int32_t
michael@0: Attr::IndexOf(const nsINode* aPossibleChild) const
michael@0: {
michael@0:   return -1;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: Attr::InsertChildAt(nsIContent* aKid, uint32_t aIndex,
michael@0:                               bool aNotify)
michael@0: {
michael@0:   return NS_ERROR_NOT_IMPLEMENTED;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::RemoveChildAt(uint32_t aIndex, bool aNotify)
michael@0: {
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: Attr::PreHandleEvent(EventChainPreVisitor& aVisitor)
michael@0: {
michael@0:   aVisitor.mCanHandle = true;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::Initialize()
michael@0: {
michael@0:   sInitialized = true;
michael@0: }
michael@0: 
michael@0: void
michael@0: Attr::Shutdown()
michael@0: {
michael@0:   sInitialized = false;
michael@0: }
michael@0: 
michael@0: JSObject*
michael@0: Attr::WrapObject(JSContext* aCx)
michael@0: {
michael@0:   return AttrBinding::Wrap(aCx, this);
michael@0: }
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla