//! [5]
QXmlNodeModelIndex FileTree::nextSibling(const QXmlNodeModelIndex &nodeIndex,
const QFileInfo &fileInfo,
qint8 offset) const
{
Q_ASSERT(offset == -1 || offset == 1);
// Get the context node's parent.
const QXmlNodeModelIndex parent(nextFromSimpleAxis(Parent, nodeIndex));
if (parent.isNull())
return QXmlNodeModelIndex();
// Get the parent's child list.
const QFileInfo parentFI(toFileInfo(parent));
Q_ASSERT(Type(parent.additionalData()) == Directory);
const QFileInfoList siblings(QDir(parentFI.absoluteFilePath()).entryInfoList(QStringList(),
m_filterAllowAll,
m_sortFlags));
Q_ASSERT_X(!siblings.isEmpty(), Q_FUNC_INFO, "Can't happen! We started at a child.");
// Find the index of the child where we started.
const int indexOfMe = siblings.indexOf(fileInfo);
// Apply the offset.
const int siblingIndex = indexOfMe + offset;
if (siblingIndex < 0 || siblingIndex > siblings.count() - 1)
return QXmlNodeModelIndex();
else
return toNodeIndex(siblings.at(siblingIndex));
}
//! [4]
QXmlNodeModelIndex
FileTree::nextFromSimpleAxis(SimpleAxis axis, const QXmlNodeModelIndex &nodeIndex) const
{
const QFileInfo fi(toFileInfo(nodeIndex));
const Type type = Type(nodeIndex.additionalData());
if (type != File && type != Directory) {
Q_ASSERT_X(axis == Parent, Q_FUNC_INFO, "An attribute only has a parent!");
return toNodeIndex(fi, Directory);
}
switch (axis) {
case Parent:
return toNodeIndex(QFileInfo(fi.path()), Directory);
case FirstChild:
{
if (type == File) // A file has no children.
return QXmlNodeModelIndex();
else {
Q_ASSERT(type == Directory);
Q_ASSERT_X(fi.isDir(), Q_FUNC_INFO, "It isn't really a directory!");
const QDir dir(fi.absoluteFilePath());
Q_ASSERT(dir.exists());
const QFileInfoList children(dir.entryInfoList(QStringList(),
m_filterAllowAll,
m_sortFlags));
if (children.isEmpty())
return QXmlNodeModelIndex();
const QFileInfo firstChild(children.first());
return toNodeIndex(firstChild);
}
}
case PreviousSibling:
return nextSibling(nodeIndex, fi, -1);
case NextSibling:
return nextSibling(nodeIndex, fi, 1);
}
Q_ASSERT_X(false, Q_FUNC_INFO, "Don't ever get here!");
return QXmlNodeModelIndex();
}
/*!
Returns the attributes of \a element. The caller guarantees
that \a element is an element in this node model.
*/
QVector<QXmlNodeModelIndex>
FileTree::attributes(const QXmlNodeModelIndex &element) const
{
QVector<QXmlNodeModelIndex> result;
/* Both elements has this attribute. */
const QFileInfo &forElement = toFileInfo(element);
result.append(toNodeIndex(forElement, AttributeFilePath));
result.append(toNodeIndex(forElement, AttributeFileName));
if (Type(element.additionalData() == File)) {
result.append(toNodeIndex(forElement, AttributeSize));
result.append(toNodeIndex(forElement, AttributeSuffix));
//result.append(toNodeIndex(forElement, AttributeMIMEType));
}
else {
Q_ASSERT(element.additionalData() == Directory);
}
return result;
}
//! [0]
QXmlNodeModelIndex MyTreeModel::nextFromSimpleAxis(SimpleAxis axis, const QXmlNodeModelIndex &ni) const
{
// Convert the QXmlNodeModelIndex to a value that is specific to what we represent.
const MyValue value = toMyValue(ni);
switch(axis)
{
case Parent:
return toNodeIndex(value.parent());
case FirstChild:
case PreviousSibling:
case NextSibling:
// and so on
;
}
return QXmlNodeModelIndex();
}
/*!
Returns the QXmlNodeModelIndex for the model node representing
the directory \a dirName.
It calls QDir::cleanPath(), because an instance of QFileInfo
constructed for a path ending in '/' will return the empty string in
fileName(), instead of the directory name.
*/
QXmlNodeModelIndex FileTree::nodeFor(const QString& dirName) const
{
QFileInfo dirInfo(QDir::cleanPath(dirName));
Q_ASSERT(dirInfo.exists());
return toNodeIndex(dirInfo);
}
/*!
Always returns the QXmlNodeModelIndex for the root of the
file system, i.e. "/".
*/
QXmlNodeModelIndex FileTree::root(const QXmlNodeModelIndex &node) const
{
Q_UNUSED(node);
return toNodeIndex(QFileInfo(QLatin1String("/")));
}
//! [0]
QXmlNodeModelIndex FileTree::toNodeIndex(const QFileInfo &fileInfo) const
{
return toNodeIndex(fileInfo, fileInfo.isDir() ? Directory : File);
}
