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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/. */

 /*

  * Class that represents a prefix/namespace/localName triple; a single

  * nodeinfo is shared by all elements in a document that have that

  * prefix, namespace, and localName.

  */

 #include "mozilla/ArrayUtils.h"

 #include "mozilla/Likely.h"

 #include "nscore.h"

 #include "nsNodeInfo.h"

 #include "nsNodeInfoManager.h"

 #include "nsCOMPtr.h"

 #include "nsString.h"

 #include "nsIAtom.h"

 #include "nsDOMString.h"

 #include "nsCRT.h"

 #include "nsContentUtils.h"

 #include "nsReadableUtils.h"

 #include "nsAutoPtr.h"

 #include "prprf.h"

 #include "nsIDocument.h"

 #include "nsGkAtoms.h"

 #include "nsCCUncollectableMarker.h"

 using namespace mozilla;

 nsNodeInfo::~nsNodeInfo()

 {

   mOwnerManager->RemoveNodeInfo(this);

   NS_RELEASE(mInner.mName);

   NS_IF_RELEASE(mInner.mPrefix);

   NS_IF_RELEASE(mInner.mExtraName);

 }

 nsNodeInfo::nsNodeInfo(nsIAtom *aName, nsIAtom *aPrefix, int32_t aNamespaceID,

                        uint16_t aNodeType, nsIAtom* aExtraName,

                        nsNodeInfoManager *aOwnerManager)

 {

   CheckValidNodeInfo(aNodeType, aName, aNamespaceID, aExtraName);

   NS_ABORT_IF_FALSE(aOwnerManager, "Invalid aOwnerManager");

   // Initialize mInner

   NS_ADDREF(mInner.mName = aName);

   NS_IF_ADDREF(mInner.mPrefix = aPrefix);

   mInner.mNamespaceID = aNamespaceID;

   mInner.mNodeType = aNodeType;

   mOwnerManager = aOwnerManager;

   NS_IF_ADDREF(mInner.mExtraName = aExtraName);

   mDocument = aOwnerManager->GetDocument();

   // Now compute our cached members.

   // Qualified name.  If we have no prefix, use ToString on

   // mInner.mName so that we get to share its buffer.

   if (aPrefix) {

     mQualifiedName = nsDependentAtomString(mInner.mPrefix) +

                      NS_LITERAL_STRING(":") +

                      nsDependentAtomString(mInner.mName);

   } else {

     mInner.mName->ToString(mQualifiedName);

   }

   MOZ_ASSERT_IF(aNodeType != nsIDOMNode::ELEMENT_NODE &&

                 aNodeType != nsIDOMNode::ATTRIBUTE_NODE &&

                 aNodeType != UINT16_MAX,

                 aNamespaceID == kNameSpaceID_None && !aPrefix);

   switch (aNodeType) {

     case nsIDOMNode::ELEMENT_NODE:

     case nsIDOMNode::ATTRIBUTE_NODE:

       // Correct the case for HTML

       if (aNodeType == nsIDOMNode::ELEMENT_NODE &&

           aNamespaceID == kNameSpaceID_XHTML && GetDocument() &&

           GetDocument()->IsHTML()) {

         nsContentUtils::ASCIIToUpper(mQualifiedName, mNodeName);

       } else {

         mNodeName = mQualifiedName;

       }

       mInner.mName->ToString(mLocalName);

       break;

     case nsIDOMNode::TEXT_NODE:

     case nsIDOMNode::CDATA_SECTION_NODE:

     case nsIDOMNode::COMMENT_NODE:

     case nsIDOMNode::DOCUMENT_NODE:

     case nsIDOMNode::DOCUMENT_FRAGMENT_NODE:

       mInner.mName->ToString(mNodeName);

       SetDOMStringToNull(mLocalName);

       break;

     case nsIDOMNode::PROCESSING_INSTRUCTION_NODE:

     case nsIDOMNode::DOCUMENT_TYPE_NODE:

       mInner.mExtraName->ToString(mNodeName);

       SetDOMStringToNull(mLocalName);

       break;

     default:

       NS_ABORT_IF_FALSE(aNodeType == UINT16_MAX,

                         "Unknown node type");

   }

 }

 // nsISupports

 NS_IMPL_CYCLE_COLLECTION_CLASS(nsNodeInfo)

 NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsNodeInfo)

 static const char* kNSURIs[] = {

   " ([none])",

   " (xmlns)",

   " (xml)",

   " (xhtml)",

   " (XLink)",

   " (XSLT)",

   " (XBL)",

   " (MathML)",

   " (RDF)",

   " (XUL)"

 };

 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(nsNodeInfo)

   if (MOZ_UNLIKELY(cb.WantDebugInfo())) {

     char name[72];

     uint32_t nsid = tmp->NamespaceID();

     nsAtomCString localName(tmp->NameAtom());

     if (nsid < ArrayLength(kNSURIs)) {

       PR_snprintf(name, sizeof(name), "nsNodeInfo%s %s", kNSURIs[nsid],

                   localName.get());

     }

     else {

       PR_snprintf(name, sizeof(name), "nsNodeInfo %s", localName.get());

     }

     cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);

   }

   else {

     NS_IMPL_CYCLE_COLLECTION_DESCRIBE(nsNodeInfo, tmp->mRefCnt.get())

   }

   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwnerManager)

 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsNodeInfo)

   return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsNodeInfo)

   return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsNodeInfo)

   return nsCCUncollectableMarker::sGeneration && tmp->CanSkip();

 NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END

 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsNodeInfo)

 NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(nsNodeInfo, LastRelease())

 NS_INTERFACE_TABLE_HEAD(nsNodeInfo)

   NS_INTERFACE_TABLE(nsNodeInfo, nsINodeInfo)

   NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsNodeInfo)

 NS_INTERFACE_MAP_END

 // nsINodeInfo

 void

 nsNodeInfo::GetNamespaceURI(nsAString& aNameSpaceURI) const

 {

   if (mInner.mNamespaceID > 0) {

     nsresult rv =

       nsContentUtils::NameSpaceManager()->GetNameSpaceURI(mInner.mNamespaceID,

                                                           aNameSpaceURI);

     // How can we possibly end up with a bogus namespace ID here?

     if (NS_FAILED(rv)) {

       MOZ_CRASH();

     }

   } else {

     SetDOMStringToNull(aNameSpaceURI);

   }

 }

 bool

 nsNodeInfo::NamespaceEquals(const nsAString& aNamespaceURI) const

 {

   int32_t nsid =

     nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);

   return nsINodeInfo::NamespaceEquals(nsid);

 }

 void

 nsNodeInfo::LastRelease()

 {

   nsRefPtr<nsNodeInfoManager> kungFuDeathGrip = mOwnerManager;

   delete this;

 }

 bool

 nsNodeInfo::CanSkip()

 {

   return mDocument &&

     nsCCUncollectableMarker::InGeneration(mDocument->GetMarkedCCGeneration());

 }