C++ txXPathNode::isDocument方法代码示例

/* static */
void
txXPathNodeUtils::getNodeName(const txXPathNode& aNode, nsAString& aName)
{
    if (aNode.isDocument()) {
        aName.Truncate();

        return;
    }

    if (aNode.isContent()) {
        // Elements and PIs have a name
        if (aNode.mNode->IsElement() ||
            aNode.mNode->NodeType() ==
            nsIDOMNode::PROCESSING_INSTRUCTION_NODE) {
            aName = aNode.Content()->NodeName();
            return;
        }

        aName.Truncate();

        return;
    }

    aNode.Content()->GetAttrNameAt(aNode.mIndex)->GetQualifiedName(aName);
}

/* static */
already_AddRefed<nsAtom>
txXPathNodeUtils::getLocalName(const txXPathNode& aNode)
{
    if (aNode.isDocument()) {
        return nullptr;
    }

    if (aNode.isContent()) {
        if (aNode.mNode->IsElement()) {
            RefPtr<nsAtom> localName =
                aNode.Content()->NodeInfo()->NameAtom();
            return localName.forget();
        }

        if (aNode.mNode->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
            return NS_Atomize(aNode.mNode->NodeName());
        }

        return nullptr;
    }

    // This is an attribute node, so we necessarily come from an element.
    RefPtr<nsAtom> localName =
      aNode.Content()->AsElement()->GetAttrNameAt(aNode.mIndex)->LocalName();

    return localName.forget();
}

/* static */
already_AddRefed<nsIAtom>
txXPathNodeUtils::getLocalName(const txXPathNode& aNode)
{
    if (aNode.isDocument()) {
        return nsnull;
    }

    if (aNode.isContent()) {
        if (aNode.mNode->IsElement()) {
            nsIAtom* localName = aNode.Content()->Tag();
            NS_ADDREF(localName);

            return localName;
        }

        if (aNode.mNode->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
            nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode.mNode);
            nsAutoString target;
            node->GetNodeName(target);

            return NS_NewAtom(target);
        }

        return nsnull;
    }

    nsIAtom* localName = aNode.Content()->
        GetAttrNameAt(aNode.mIndex)->LocalName();
    NS_ADDREF(localName);

    return localName;
}

/* static */
PRUint16
txXPathNodeUtils::getNodeType(const txXPathNode& aNode)
{
    if (aNode.isDocument()) {
        return txXPathNodeType::DOCUMENT_NODE;
    }

    if (aNode.isContent()) {
        PRUint16 type;
        nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode.mNode);
        node->GetNodeType(&type);

        return type;
    }

    return txXPathNodeType::ATTRIBUTE_NODE;
}

/* static */
void
txXPathNodeUtils::getLocalName(const txXPathNode& aNode, nsAString& aLocalName)
{
    if (aNode.isDocument()) {
        aLocalName.Truncate();

        return;
    }

    if (aNode.isContent()) {
        if (aNode.mNode->IsNodeOfType(nsINode::eELEMENT)) {
            nsINodeInfo* nodeInfo = aNode.Content()->NodeInfo();
            nodeInfo->GetLocalName(aLocalName);

            // Check for html
            if (nodeInfo->NamespaceEquals(kNameSpaceID_None) &&
                aNode.mNode->IsNodeOfType(nsINode::eHTML)) {
                ToUpperCase(aLocalName);
            }

            return;
        }

        if (aNode.mNode->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
            // PIs don't have a nodeinfo but do have a name
            nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode.mNode);
            node->GetNodeName(aLocalName);

            return;
        }

        aLocalName.Truncate();

        return;
    }

    aNode.Content()->GetAttrNameAt(aNode.mIndex)->LocalName()->
      ToString(aLocalName);

    // Check for html
    if (aNode.Content()->NodeInfo()->NamespaceEquals(kNameSpaceID_None) &&
        aNode.Content()->IsNodeOfType(nsINode::eHTML)) {
        ToUpperCase(aLocalName);
    }
}

/* static */
void
txXPathNodeUtils::getNodeName(const txXPathNode& aNode, nsAString& aName)
{
    if (aNode.isDocument()) {
        aName.Truncate();

        return;
    }

    if (aNode.isContent()) {
        if (aNode.mNode->IsElement()) {
            nsINodeInfo* nodeInfo = aNode.Content()->NodeInfo();
            nodeInfo->GetQualifiedName(aName);

            // Check for html
            if (aNode.Content()->IsHTML() &&
                aNode.Content()->IsInHTMLDocument()) {
                ToUpperCase(aName);
            }
            return;
        }

        if (aNode.mNode->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
            // PIs don't have a nodeinfo but do have a name
            nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode.mNode);
            node->GetNodeName(aName);

            return;
        }

        aName.Truncate();

        return;
    }

    aNode.Content()->GetAttrNameAt(aNode.mIndex)->GetQualifiedName(aName);

    // Check for html
    if (aNode.Content()->IsHTML()) {
        ToUpperCase(aName);
    }
}

/* static */
void
txXPathNodeUtils::getLocalName(const txXPathNode& aNode, nsAString& aLocalName)
{
    if (aNode.isDocument()) {
        aLocalName.Truncate();

        return;
    }

    if (aNode.isContent()) {
        if (aNode.mNode->IsElement()) {
            mozilla::dom::NodeInfo* nodeInfo = aNode.Content()->NodeInfo();
            nodeInfo->GetName(aLocalName);
            return;
        }

        if (aNode.mNode->IsNodeOfType(nsINode::ePROCESSING_INSTRUCTION)) {
            // PIs don't have a nodeinfo but do have a name
            // XXXbz Not actually true, but this function looks like it wants
            // different things from elements and PIs for "local name"...
            aLocalName = aNode.mNode->NodeName();
            return;
        }

        aLocalName.Truncate();

        return;
    }

    aNode.Content()->AsElement()->GetAttrNameAt(aNode.mIndex)->LocalName()->
      ToString(aLocalName);

    // Check for html
    if (aNode.Content()->NodeInfo()->NamespaceEquals(kNameSpaceID_None) &&
        aNode.Content()->IsHTMLElement()) {
        nsContentUtils::ASCIIToUpper(aLocalName);
    }
}

/* static */
PRIntn
txXPathNodeUtils::comparePosition(const txXPathNode& aNode,
                                  const txXPathNode& aOtherNode)
{
    // First check for equal nodes or attribute-nodes on the same element.
    if (aNode.mNode == aOtherNode.mNode) {
        if (aNode.mIndex == aOtherNode.mIndex) {
            return 0;
        }

        NS_ASSERTION(!aNode.isDocument() && !aOtherNode.isDocument(),
                     "documents should always have a set index");

        if (aNode.isContent() || (!aOtherNode.isContent() &&
                                  aNode.mIndex < aOtherNode.mIndex)) {
            return -1;
        }

        return 1;
    }

    // Get document for both nodes.
    nsIDocument* document = aNode.mNode->GetCurrentDoc();
    nsIDocument* otherDocument = aOtherNode.mNode->GetCurrentDoc();

    // If the nodes have different current documents, compare the document
    // pointers.
    if (document != otherDocument) {
        return document < otherDocument ? -1 : 1;
    }

    // Now either both nodes are in orphan trees, or they are both in the
    // same tree.

    // Get parents up the tree.
    nsAutoTArray<nsINode*, 8> parents, otherParents;
    nsINode* node = aNode.mNode;
    nsINode* otherNode = aOtherNode.mNode;
    nsINode* parent, *otherParent;
    while (node && otherNode) {
        parent = node->GetNodeParent();
        otherParent = otherNode->GetNodeParent();

        // Hopefully this is a common case.
        if (parent == otherParent) {
            if (!parent) {
                // Both node and otherNode are root nodes in respective orphan
                // tree.
                return node < otherNode ? -1 : 1;
            }

            return parent->IndexOf(node) < parent->IndexOf(otherNode) ?
                   -1 : 1;
        }

        parents.AppendElement(node);
        otherParents.AppendElement(otherNode);
        node = parent;
        otherNode = otherParent;
    }

    while (node) {
        parents.AppendElement(node);
        node = node->GetNodeParent();
    }
    while (otherNode) {
        otherParents.AppendElement(otherNode);
        otherNode = otherNode->GetNodeParent();
    }

    // Walk back down along the parent-chains until we find where they split.
    PRInt32 total = parents.Length() - 1;
    PRInt32 otherTotal = otherParents.Length() - 1;
    NS_ASSERTION(total != otherTotal, "Can't have same number of parents");

    PRInt32 lastIndex = NS_MIN(total, otherTotal);
    PRInt32 i;
    parent = nsnull;
    for (i = 0; i <= lastIndex; ++i) {
        node = parents.ElementAt(total - i);
        otherNode = otherParents.ElementAt(otherTotal - i);
        if (node != otherNode) {
            if (!parent) {
                // The two nodes are in different orphan subtrees.
                NS_ASSERTION(i == 0, "this shouldn't happen");
                return node < otherNode ? -1 : 1;
            }

            PRInt32 index = parent->IndexOf(node);
            PRInt32 otherIndex = parent->IndexOf(otherNode);
            NS_ASSERTION(index != otherIndex && index >= 0 && otherIndex >= 0,
                         "invalid index in compareTreePosition");

            return index < otherIndex ? -1 : 1;
        }

        parent = node;
    }

//.........这里部分代码省略.........