qdom.cpp

奇趣公司比较新的qt/emd版本

    return !operator==(n);
}

/*!
    Destroys the object and frees its resources.
*/
QDomNodeList::~QDomNodeList()
{
    if (impl && !impl->ref.deref())
        delete impl;
}

/*!
    Returns the node at position \a index.

    If \a index is negative or if \a index >= length() then a null
    node is returned (i.e. a node for which QDomNode::isNull() returns
    true).

    \sa length()
*/
QDomNode QDomNodeList::item(int index) const
{
    if (!impl)
        return QDomNode();

    return QDomNode(impl->item(index));
}

/*!
    Returns the number of nodes in the list.
*/
uint QDomNodeList::length() const
{
    if (!impl)
        return 0;
    return impl->length();
}

/*!
    \fn bool QDomNodeList::isEmpty() const

    Returns true if the list contains no items; otherwise returns false.
    This function is provided for Qt API consistency.
*/

/*!
    \fn int QDomNodeList::count() const

    This function is provided for Qt API consistency. It is equivalent to length().
*/

/*!
    \fn int QDomNodeList::size() const

    This function is provided for Qt API consistency. It is equivalent to length().
*/

/*!
    \fn QDomNode QDomNodeList::at(int index) const

    This function is provided for Qt API consistency. It is equivalent
    to item().

    If \a index is negative or if \a index >= length() then a null
    node is returned (i.e. a node for which QDomNode::isNull() returns
    true).
*/

/**************************************************************
 *
 * QDomNodePrivate
 *
 **************************************************************/

inline void QDomNodePrivate::setOwnerDocument(QDomDocumentPrivate *doc)
{
    ownerNode = doc;
    hasParent = false;
}

QDomNodePrivate::QDomNodePrivate(QDomDocumentPrivate *doc, QDomNodePrivate *par)
{
    ref = 1;
    if (par)
        setParent(par);
    else
        setOwnerDocument(doc);
    prev = 0;
    next = 0;
    first = 0;
    last = 0;
    createdWithDom1Interface = true;
    lineNumber = -1;
    columnNumber = -1;
}

QDomNodePrivate::QDomNodePrivate(QDomNodePrivate *n, bool deep)
{
    ref = 1;
    setOwnerDocument(n->ownerDocument());
    prev = 0;
    next = 0;
    first = 0;
    last = 0;

    name = n->name;
    value = n->value;
    prefix = n->prefix;
    namespaceURI = n->namespaceURI;
    createdWithDom1Interface = n->createdWithDom1Interface;
    lineNumber = -1;
    columnNumber = -1;

    if (!deep)
        return;

    for (QDomNodePrivate* x = n->first; x; x = x->next)
        appendChild(x->cloneNode(true));
}

QDomNodePrivate::~QDomNodePrivate()
{
    QDomNodePrivate* p = first;
    QDomNodePrivate* n;

    while (p) {
        n = p->next;
        if (!p->ref.deref())
            delete p;
        else
            p->setNoParent();
        p = n;
    }
    first = 0;
    last = 0;
}

void QDomNodePrivate::clear()
{
    QDomNodePrivate* p = first;
    QDomNodePrivate* n;

    while (p) {
        n = p->next;
        if (!p->ref.deref())
            delete p;
        p = n;
    }
    first = 0;
    last = 0;
}

QDomNodePrivate* QDomNodePrivate::namedItem(const QString &n)
{
    QDomNodePrivate* p = first;
    while (p) {
        if (p->nodeName() == n)
            return p;
        p = p->next;
    }
    return 0;
}


QDomNodePrivate* QDomNodePrivate::insertBefore(QDomNodePrivate* newChild, QDomNodePrivate* refChild)
{
    // Error check
    if (!newChild)
        return 0;

    // Error check
    if (newChild == refChild)
        return 0;

    // Error check
    if (refChild && refChild->parent() != this)
        return 0;

    // "mark lists as dirty"
    qt_nodeListTime++;

    // Special handling for inserting a fragment. We just insert
    // all elements of the fragment instead of the fragment itself.
    if (newChild->isDocumentFragment()) {
        // Fragment is empty ?
        if (newChild->first == 0)
            return newChild;

        // New parent
        QDomNodePrivate* n = newChild->first;
        while (n)  {
            n->setParent(this);
            n = n->next;
        }

        // Insert at the beginning ?
        if (!refChild || refChild->prev == 0) {
            if (first)
                first->prev = newChild->last;
            newChild->last->next = first;
            if (!last)
                last = newChild->last;
            first = newChild->first;
        } else {
            // Insert in the middle
            newChild->last->next = refChild;
            newChild->first->prev = refChild->prev;
            refChild->prev->next = newChild->first;
            refChild->prev = newChild->last;
        }

        // No need to increase the reference since QDomDocumentFragment
        // does not decrease the reference.

        // Remove the nodes from the fragment
        newChild->first = 0;
        newChild->last = 0;
        return newChild;
    }

    // No more errors can occur now, so we take
    // ownership of the node.
    newChild->ref.ref();

    if (newChild->parent())
        newChild->parent()->removeChild(newChild);

    newChild->setParent(this);

    if (!refChild) {
        if (first)
            first->prev = newChild;
        newChild->next = first;
        if (!last)
            last = newChild;
        first = newChild;
        return newChild;
    }

    if (refChild->prev == 0) {
        if (first)
            first->prev = newChild;
        newChild->next = first;
        if (!last)
            last = newChild;
        first = newChild;
        return newChild;
    }

    newChild->next = refChild;
    newChild->prev = refChild->prev;
    refChild->prev->next = newChild;
    refChild->prev = newChild;

    return newChild;
}

QDomNodePrivate* QDomNodePrivate::insertAfter(QDomNodePrivate* newChild, QDomNodePrivate* refChild)
{
    // Error check
    if (!newChild)
        return 0;

    // Error check
    if (newChild == refChild)
        return 0;

    // Error check
    if (refChild && refChild->parent() != this)
        return 0;

    // "mark lists as dirty"
    qt_nodeListTime++;

    // Special handling for inserting a fragment. We just insert
    // all elements of the fragment instead of the fragment itself.
    if (newChild->isDocumentFragment()) {
        // Fragment is empty ?
        if (newChild->first == 0)
            return newChild;

        // New parent
        QDomNodePrivate* n = newChild->first;
        while (n) {
            n->setParent(this);
            n = n->next;
        }

        // Insert at the end
        if (!refChild || refChild->next == 0) {
            if (last)
                last->next = newChild->first;
            newChild->first->prev = last;
            if (!first)
                first = newChild->first;
            last = newChild->last;
        } else { // Insert in the middle
            newChild->first->prev = refChild;
            newChild->last->next = refChild->next;
            refChild->next->prev = newChild->last;
            refChild->next = newChild->first;
        }

        // No need to increase the reference since QDomDocumentFragment
        // does not decrease the reference.

        // Remove the nodes from the fragment
        newChild->first = 0;
        newChild->last = 0;
        return newChild;
    }

    // Release new node from its current parent
    if (newChild->parent())
        newChild->parent()->removeChild(newChild);

    // No more errors can occur now, so we take
    // ownership of the node
    newChild->ref.ref();

    newChild->setParent(this);

    // Insert at the end
    if (!refChild) {
        if (last)
            last->next = newChild;
        newChild->prev = last;
        if (!first)
            first = newChild;
        last = newChild;
        return newChild;
    }

    if (refChild->next == 0) {
        if (last)
            last->next = newChild;
        newChild->prev = last;
        if (!first)
            first = newChild;
        last = newChild;
        return newChild;
    }

    newChild->prev = refChild;
    newChild->next = refChild->next;
    refChild->next->prev = newChild;
    refChild->next = newChild;

    return newChild;
}

QDomNodePrivate* QDomNodePrivate::replaceChild(QDomNodePrivate* newChild, QDomNodePrivate* oldChild)
{
    if (!newChild || !oldChild)
        return 0;
    if (oldChild->parent() != this)
        return 0;
    if (newChild == oldChild)
        return 0;

    // mark lists as dirty
    qt_nodeListTime++;

    // Special handling for inserting a fragment. We just insert
    // all elements of the fragment instead of the fragment itself.
    if (newChild->isDocumentFragment()) {
        // Fragment is empty ?
        if (newChild->first == 0)
            return newChild;

        // New parent
        QDomNodePrivate* n = newChild->first;
        while (n) {
            n->setParent(this);
            n = n->next;
        }


        if (oldChild->next)
            oldChild->next->prev = newChild->last;
        if (oldChild->prev)
            oldChild->prev->next = newChild->first;

        newChild->last->next = oldChild->next;
        newChild->first->prev = oldChild->prev;

        if (first == oldChild)
            first = newChild->first;
        if (last == oldChild)
            last = newChild->last;

        oldChild->setNoParent();
        oldChild->next = 0;
        oldChild->prev = 0;

        // No need to increase the reference since QDomDocumentFragment
        // does not decrease the reference.

        // Remove the nodes from the fragment
        newChild->first = 0;
        newChild->last = 0;

        // We are no longer interested in the old node
        if (oldChild)
            oldChild->ref.deref();

        return oldChild;
    }

    // No more errors can occur now, so we take
    // ownership of the node
    newChild->ref.ref();

    // Release new node from its current parent
    if (newChild->parent())
        newChild->parent()->removeChild(newChild);

    newChild->setParent(this);

    if (oldChild->next)
        oldChild->next->prev = newChild;
    if (oldChild->prev)
        oldChild->prev->next = newChild;

    newChild->next = oldChild->next;
    newChild->prev = oldChild->prev;

    if (first == oldChild)
        first = newChild;
    if (last == oldChild)
        last = newChild;

    oldChild->setNoParent();
    oldChild->next = 0;
    oldChild->prev = 0;

    // We are no longer interested in the old node
    if (oldChild)
        oldChild->ref.deref();

    return oldChild;
}

QDomNodePrivate* QDomNodePrivate::removeChild(QDomNodePrivate* oldChild)