C++ NodeImpl::getNextSibling方法代码示例

void AttrImpl::cloneChildren(const NodeImpl &other) {
  //    for (NodeImpl *mykid = other.getFirstChild();
    for (NodeImpl *mykid = ((NodeImpl&)other).getFirstChild();
         mykid != null;
         mykid = mykid->getNextSibling()) {
        this->appendChild(mykid->cloneNode(true));
    }
}

//  NodeImpl::deleteIf is called when a node's reference count goes
//  to 0.  It is separate function from removeRef because removeRef
//  is likely to be in-lined.
//
//  See comments at RefCountedImpl::removeRef().
//
void NodeImpl::deleteIf(NodeImpl *thisNode)
{
    if (thisNode == 0)
        return;

    if (thisNode->isOwned())
        return;

    // Delete this node.  There should be no siblings, as the DOM
    //  supports no node operations that would detach a node from
    //  its parent while retaining siblings.
    //  The target node may have children, in which case they must
    //  be removed from this node before deleting this node.

    // First, if this node is an ID attribute, we need to remove it
    // from the hashtable of element IDs before removing the Attrs
    //   children.  This is because the Attr's children Text nodes
    //   contain the attr's value, which is the hash table key.
    //
    if (thisNode->isAttrImpl() && ((AttrImpl *)thisNode->isIdAttr()))
    {
        ((AttrImpl *)thisNode)->getOwnerDocument() ->
        getNodeIDMap()->remove((AttrImpl *)thisNode);
    }

    thisNode->isReadOnly(false);   // removeChild requires node not be readonly.
    NodeImpl *theNextChild;
    for (NodeImpl *child = thisNode->getFirstChild(); child != 0;
            child=theNextChild)
    {
        theNextChild = child->getNextSibling();
        thisNode->removeChild(child);
        if (child->nodeRefCount == 0)
            deleteIf(child);
    }
    delete thisNode;
};

NodeImpl *ParentNode::insertBefore(NodeImpl *newChild, NodeImpl *refChild) {

    bool errorChecking = ownerDocument->getErrorChecking();

    if (newChild->isDocumentFragmentImpl()) {
        // SLOW BUT SAFE: We could insert the whole subtree without
        // juggling so many next/previous pointers. (Wipe out the
        // parent's child-list, patch the parent pointers, set the
        // ends of the list.) But we know some subclasses have special-
        // case behavior they add to insertBefore(), so we don't risk it.
        // This approch also takes fewer bytecodes.

        // NOTE: If one of the children is not a legal child of this
        // node, throw HIERARCHY_REQUEST_ERR before _any_ of the children
        // have been transferred. (Alternative behaviors would be to
        // reparent up to the first failure point or reparent all those
        // which are acceptable to the target node, neither of which is
        // as robust. PR-DOM-0818 isn't entirely clear on which it
        // recommends?????

        // No need to check kids for right-document; if they weren't,
        // they wouldn't be kids of that DocFrag.
        if (errorChecking) {
            for (NodeImpl *kid = newChild->getFirstChild(); // Prescan
                 kid != null; kid = kid->getNextSibling()) {

                if (!DocumentImpl::isKidOK(this, kid)) {
                    throw DOM_DOMException(
                                       DOM_DOMException::HIERARCHY_REQUEST_ERR,
                                       null);
                }
            }
        }

        while (newChild->hasChildNodes()) {    // Move
            insertBefore(newChild->getFirstChild(),refChild);
        }
        return newChild;
    }

    // it's a no-op if refChild is the same as newChild
    if (refChild == newChild) {
        return newChild;
    }

    if (errorChecking) {
        if (isReadOnly()) {
            throw DOM_DOMException(
                                 DOM_DOMException::NO_MODIFICATION_ALLOWED_ERR,
                                 null);
        }
        if (newChild->getOwnerDocument() != ownerDocument) {
            throw DOM_DOMException(DOM_DOMException::WRONG_DOCUMENT_ERR, null);
        }
        if (!DocumentImpl::isKidOK(this, newChild)) {
            throw DOM_DOMException(DOM_DOMException::HIERARCHY_REQUEST_ERR,
                                   null);
        }
        // refChild must be a child of this node (or null)
        if (refChild != null && refChild->getParentNode() != this) {
            throw DOM_DOMException(DOM_DOMException::NOT_FOUND_ERR, null);
        }

        // Prevent cycles in the tree
        // newChild cannot be ancestor of this Node,
        // and actually cannot be this
        bool treeSafe = true;
        for (NodeImpl *a = this; treeSafe && a != null; a = a->getParentNode())
        {
            treeSafe = (newChild != a);
        }
        if (!treeSafe) {
            throw DOM_DOMException(DOM_DOMException::HIERARCHY_REQUEST_ERR,
                                   null);
        }
    }

    // Convert to internal type, to avoid repeated casting
    ChildNode * newInternal = (ChildNode *)newChild;

    NodeImpl *oldparent = newInternal->getParentNode();
    if (oldparent != null) {
        oldparent->removeChild(newInternal);
    }

    // Convert to internal type, to avoid repeated casting
    ChildNode *refInternal = (ChildNode *)refChild;

    // Attach up
    newInternal->ownerNode = this;
    newInternal->isOwned(true);

    // Attach before and after
    // Note: firstChild.previousSibling == lastChild!!
    if (firstChild == null) {
        // this our first and only child
        firstChild = newInternal;
        newInternal->isFirstChild(true);
        newInternal->previousSibling = newInternal;
    }
//.........这里部分代码省略.........