domelementimpl.cpp

来自「IBM的解析xml的工具Xerces的源代码」· C++ 代码 · 共 650 行 · 第 1/2 页

        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    DOMAttr* newAttr = getAttributeNodeNS(fNamespaceURI, qualifiedName);

    if (!newAttr)
    {
        newAttr = this->fNode.getOwnerDocument()->createAttributeNS(fNamespaceURI, qualifiedName);
        fAttributes->setNamedItemNS(newAttr);
    }

    newAttr->setNodeValue(fValue);
}


void DOMElementImpl::removeAttributeNS(const XMLCh *fNamespaceURI,
    const XMLCh *fLocalName)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    XMLSSize_t i = fAttributes->findNamePoint(fNamespaceURI, fLocalName);
    if (i >= 0)
    {
        DOMNode *att = fAttributes->removeNamedItemAt(i);
        att->release();
    }
}


DOMAttr *DOMElementImpl::getAttributeNodeNS(const XMLCh *fNamespaceURI,
    const XMLCh *fLocalName) const
{
    return (DOMAttr *)fAttributes->getNamedItemNS(fNamespaceURI, fLocalName);
}


DOMAttr *DOMElementImpl::setAttributeNodeNS(DOMAttr *newAttr)
{
    if (fNode.isReadOnly())
        throw DOMException(
            DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    if (newAttr -> getOwnerDocument() != this -> getOwnerDocument())
        throw DOMException(DOMException::WRONG_DOCUMENT_ERR, 0, GetDOMNodeMemoryManager);

    // This will throw INUSE if necessary
    DOMAttr *oldAttr = (DOMAttr *) fAttributes->setNamedItemNS(newAttr);

    return oldAttr;
}


DOMNodeList *DOMElementImpl::getElementsByTagNameNS(const XMLCh *namespaceURI,
    const XMLCh *localName) const
{
    DOMDocumentImpl *docImpl = (DOMDocumentImpl *)getOwnerDocument();
    return docImpl->getDeepNodeList(this, namespaceURI, localName);
}

bool DOMElementImpl::hasAttributes() const
{
    return (fAttributes != 0 && fAttributes->getLength() != 0);
}


bool DOMElementImpl::hasAttribute(const XMLCh *name) const
{
    return (getAttributeNode(name) != 0);
}


bool DOMElementImpl::hasAttributeNS(const XMLCh *namespaceURI,
    const XMLCh *localName) const
{
    return (getAttributeNodeNS(namespaceURI, localName) != 0);
}


// util functions for default attributes
// returns the default attribute map for this node from the owner document
DOMAttrMapImpl *DOMElementImpl::getDefaultAttributes() const
{
    return fDefaultAttributes;
}

// initially set up the default attribute information based on doctype information
void DOMElementImpl::setupDefaultAttributes()
{
    DOMDocument *tmpdoc = getOwnerDocument();
    if ((fNode.fOwnerNode == 0) || (tmpdoc == 0) || (tmpdoc->getDoctype() == 0))
        return;

    DOMNode *eldef = ((DOMDocumentTypeImpl*)tmpdoc->getDoctype())->getElements()->getNamedItem(getNodeName());
    DOMAttrMapImpl* defAttrs = (eldef == 0) ? 0 : (DOMAttrMapImpl *)(eldef->getAttributes());

    if (defAttrs)
        fDefaultAttributes = new (getOwnerDocument()) DOMAttrMapImpl(this, defAttrs);
}

DOMAttr * DOMElementImpl::setDefaultAttributeNode(DOMAttr *newAttr)
{
    if (fNode.isReadOnly())
        throw DOMException(
        DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    if (newAttr->getNodeType() != DOMNode::ATTRIBUTE_NODE)
        throw DOMException(DOMException::WRONG_DOCUMENT_ERR, 0, GetDOMNodeMemoryManager);
        // revisit.  Exception doesn't match test.

    // This will throw INUSE if necessary
    DOMAttr *oldAttr = (DOMAttr *) fDefaultAttributes->setNamedItem(newAttr);
    fAttributes->hasDefaults(true);

    return oldAttr;
}


DOMAttr *DOMElementImpl::setDefaultAttributeNodeNS(DOMAttr *newAttr)
{
    if (fNode.isReadOnly())
        throw DOMException(
            DOMException::NO_MODIFICATION_ALLOWED_ERR, 0, GetDOMNodeMemoryManager);

    if (newAttr -> getOwnerDocument() != this -> getOwnerDocument())
        throw DOMException(DOMException::WRONG_DOCUMENT_ERR, 0, GetDOMNodeMemoryManager);

    // This will throw INUSE if necessary
    DOMAttr *oldAttr = (DOMAttr *) fDefaultAttributes->setNamedItemNS(newAttr);
    fAttributes->hasDefaults(true);

    return oldAttr;
}

void DOMElementImpl::release()
{
    if (fNode.isOwned() && !fNode.isToBeReleased())
        throw DOMException(DOMException::INVALID_ACCESS_ERR,0, GetDOMNodeMemoryManager);

    DOMDocumentImpl* doc = (DOMDocumentImpl*) getOwnerDocument();
    if (doc) {
        fNode.callUserDataHandlers(DOMUserDataHandler::NODE_DELETED, 0, 0);
        fParent.release();
        doc->release(this, DOMDocumentImpl::ELEMENT_OBJECT);
    }
    else {
        // shouldn't reach here
        throw DOMException(DOMException::INVALID_ACCESS_ERR,0, GetDOMNodeMemoryManager);
    }
}

const XMLCh* DOMElementImpl::getBaseURI() const
{
    const XMLCh* baseURI = fNode.fOwnerNode->getBaseURI();
    if (fAttributes) {
        const XMLCh xmlBaseString[] =
        {
            chLatin_x, chLatin_m, chLatin_l, chColon, chLatin_b, chLatin_a, chLatin_s, chLatin_e, chNull
        };
        DOMNode* attrNode = fAttributes->getNamedItem(xmlBaseString);
        if (attrNode) {
            const XMLCh* uri =  attrNode->getNodeValue();
            if (uri && *uri) {// attribute value is always empty string
                try {
                    XMLUri temp(baseURI, ((DOMDocumentImpl *)this->getOwnerDocument())->getMemoryManager());
                    XMLUri temp2(&temp, uri, ((DOMDocumentImpl *)this->getOwnerDocument())->getMemoryManager());
                    uri = ((DOMDocumentImpl *)this->getOwnerDocument())->cloneString(temp2.getUriText());
                }
                catch(const OutOfMemoryException&)
                {
                    throw;
                }
                catch (...){
                    // REVISIT: what should happen in this case?
                    return 0;
                }
                return uri;
            }
        }
    }
    return baseURI;
}



//
//   Functions inherited from Node
//
           DOMNode*         DOMElementImpl::appendChild(DOMNode *newChild)          {return fParent.appendChild (newChild); }
           DOMNodeList*     DOMElementImpl::getChildNodes() const                   {return fParent.getChildNodes (); }
           DOMNode*         DOMElementImpl::getFirstChild() const                   {return fParent.getFirstChild (); }
           DOMNode*         DOMElementImpl::getLastChild() const                    {return fParent.getLastChild (); }
     const XMLCh*           DOMElementImpl::getLocalName() const                    {return fNode.getLocalName (); }
     const XMLCh*           DOMElementImpl::getNamespaceURI() const                 {return fNode.getNamespaceURI (); }
           DOMNode*         DOMElementImpl::getNextSibling() const                  {return fChild.getNextSibling (); }
     const XMLCh*           DOMElementImpl::getNodeValue() const                    {return fNode.getNodeValue (); }
           DOMDocument*     DOMElementImpl::getOwnerDocument() const                {return fParent.fOwnerDocument; }
     const XMLCh*           DOMElementImpl::getPrefix() const                       {return fNode.getPrefix (); }
           DOMNode*         DOMElementImpl::getParentNode() const                   {return fChild.getParentNode (this); }
           DOMNode*         DOMElementImpl::getPreviousSibling() const              {return fChild.getPreviousSibling (this); }
           bool             DOMElementImpl::hasChildNodes() const                   {return fParent.hasChildNodes (); }
           DOMNode*         DOMElementImpl::insertBefore(DOMNode *newChild, DOMNode *refChild)
                                                                                    {return fParent.insertBefore (newChild, refChild); }
           void             DOMElementImpl::normalize()                             {fParent.normalize (); }
           DOMNode*         DOMElementImpl::removeChild(DOMNode *oldChild)          {return fParent.removeChild (oldChild); }
           DOMNode*         DOMElementImpl::replaceChild(DOMNode *newChild, DOMNode *oldChild)
                                                                                    {return fParent.replaceChild (newChild, oldChild); }
           bool             DOMElementImpl::isSupported(const XMLCh *feature, const XMLCh *version) const
                                                                                    {return fNode.isSupported (feature, version); }
           void             DOMElementImpl::setPrefix(const XMLCh  *prefix)         {fNode.setPrefix(prefix); }
           bool             DOMElementImpl::isSameNode(const DOMNode* other) const  {return fNode.isSameNode(other); }
           void*            DOMElementImpl::setUserData(const XMLCh* key, void* data, DOMUserDataHandler* handler)
                                                                                    {return fNode.setUserData(key, data, handler); }
           void*            DOMElementImpl::getUserData(const XMLCh* key) const     {return fNode.getUserData(key); }
           short            DOMElementImpl::compareTreePosition(const DOMNode* other) const {return fNode.compareTreePosition(other); }
           const XMLCh*     DOMElementImpl::getTextContent() const                  {return fNode.getTextContent(); }
           void             DOMElementImpl::setTextContent(const XMLCh* textContent){fNode.setTextContent(textContent); }
           const XMLCh*     DOMElementImpl::lookupNamespacePrefix(const XMLCh* namespaceURI, bool useDefault) const  {return fNode.lookupNamespacePrefix(namespaceURI, useDefault); }
           bool             DOMElementImpl::isDefaultNamespace(const XMLCh* namespaceURI) const {return fNode.isDefaultNamespace(namespaceURI); }
           const XMLCh*     DOMElementImpl::lookupNamespaceURI(const XMLCh* prefix) const  {return fNode.lookupNamespaceURI(prefix); }
           DOMNode*         DOMElementImpl::getInterface(const XMLCh* feature)      {return fNode.getInterface(feature); }



bool DOMElementImpl::isEqualNode(const DOMNode* arg) const
{
    if (isSameNode(arg)) {
        return true;
    }

    if (!fNode.isEqualNode(arg)) {
        return false;
    }

    bool hasAttrs = hasAttributes();

    if (hasAttrs != arg->hasAttributes()) {
        return false;
    }

    if (hasAttrs) {
        DOMNamedNodeMap* map1 = getAttributes();
        DOMNamedNodeMap* map2 = arg->getAttributes();

        XMLSize_t len = map1->getLength();
        if (len != map2->getLength()) {
            return false;
        }
        for (XMLSize_t i = 0; i < len; i++) {
            DOMNode* n1 = map1->item(i);
            if (!n1->getLocalName()) { // DOM Level 1 Node
                DOMNode* n2 = map2->getNamedItem(n1->getNodeName());
                if (!n2 || !n1->isEqualNode(n2)) {
                    return false;
                }
            }
            else {
                DOMNode* n2 = map2->getNamedItemNS(n1->getNamespaceURI(),
                                              n1->getLocalName());
                if (!n2 || !n1->isEqualNode(n2)) {
                    return false;
                }
            }
        }
    }

    return fParent.isEqualNode(arg);
}

DOMNode* DOMElementImpl::rename(const XMLCh* namespaceURI, const XMLCh* name)
{
    DOMDocumentImpl* doc = (DOMDocumentImpl*) getOwnerDocument();

    if (!namespaceURI || !*namespaceURI) {
        fName = doc->getPooledString(name);
        fAttributes->reconcileDefaultAttributes(getDefaultAttributes());

        return this;
    }
    else {

        // create a new ElementNS
        DOMElementNSImpl* newElem = (DOMElementNSImpl*)doc->createElementNS(namespaceURI, name);

        // transfer the userData
        doc->transferUserData(castToNodeImpl(this), castToNodeImpl(newElem));

        // remove old node from parent if any
        DOMNode* parent = getParentNode();
        DOMNode* nextSib = getNextSibling();
        if (parent) {
            parent->removeChild(this);
        }

        // move children to new node
        DOMNode* child = getFirstChild();
        while (child) {
            removeChild(child);
            newElem->appendChild(child);
            child = getFirstChild();
        }

        // insert new node where old one was
        if (parent) {
            parent->insertBefore(newElem, nextSib);
        }

        // move specified attributes to new node
        newElem->fAttributes->moveSpecifiedAttributes(fAttributes);

        // and fire user data NODE_RENAMED event
        castToNodeImpl(newElem)->callUserDataHandlers(DOMUserDataHandler::NODE_RENAMED, this, newElem);

        return newElem;
    }
}

const DOMTypeInfo *DOMElementImpl::getTypeInfo() const
{
    return &DOMTypeInfoImpl::g_DtdValidatedElement;
}

XERCES_CPP_NAMESPACE_END