QAbstractFileEngineIterator: general code cleanup

- This is private API, no point having the d-pointer indirection; store
  the members in QAbstractFileEngineIterator directly. In subsequent
  commits sub-classes can use m_fileInfo from the base class, saving
  some space in e.g. QFSFileEngineIterator

- Make setPath() public, it's a setter called by some QAFEI sub-classes

- Remove EntryInfoType enum, nothing uses it

This is a step towards remodeling QAFEIterator, and its subclasses,
after QFileSystemIterator, i.e. adding a `virtual bool advance()`
method, and dropping next()/hasNext(). This also is more inline with the
QDirListing class (which uses STL-style iterators).

Change-Id: I8ad774b854231e3cdce4935f04c8bf24031001dd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qabstractfileengine.cpp

@@ -870,14 +870,6 @@ bool QAbstractFileEngine::cloneTo(QAbstractFileEngine *target)
     \sa QDirListing
 */
 
-/*!
-    \enum QAbstractFileEngineIterator::EntryInfoType
-    \internal
-
-    This enum describes the different types of information that can be
-    requested through the QAbstractFileEngineIterator::entryInfo() function.
-*/
-
 /*!
     \typedef QAbstractFileEngine::Iterator
     \since 4.3
@@ -885,25 +877,15 @@ bool QAbstractFileEngine::cloneTo(QAbstractFileEngine *target)
     Synonym for QAbstractFileEngineIterator.
 */
 
-class QAbstractFileEngineIteratorPrivate
-{
-public:
-    QString path;
-    QDir::Filters filters;
-    QStringList nameFilters;
-    QFileInfo fileInfo;
-};
-
 /*!
     Constructs a QAbstractFileEngineIterator, using the entry filters \a
     filters, and wildcard name filters \a nameFilters.
 */
 QAbstractFileEngineIterator::QAbstractFileEngineIterator(QDir::Filters filters,
                                                          const QStringList &nameFilters)
-    : d(new QAbstractFileEngineIteratorPrivate)
+    : m_filters(filters),
+      m_nameFilters(nameFilters)
 {
-    d->nameFilters = nameFilters;
-    d->filters = filters;
 }
 
 /*!
@@ -926,7 +908,7 @@ QAbstractFileEngineIterator::~QAbstractFileEngineIterator()
 */
 QString QAbstractFileEngineIterator::path() const
 {
-    return d->path;
+    return m_path;
 }
 
 /*!
@@ -937,7 +919,7 @@ QString QAbstractFileEngineIterator::path() const
 */
 void QAbstractFileEngineIterator::setPath(const QString &path)
 {
-    d->path = path;
+    m_path = path;
 }
 
 /*!
@@ -947,7 +929,7 @@ void QAbstractFileEngineIterator::setPath(const QString &path)
 */
 QStringList QAbstractFileEngineIterator::nameFilters() const
 {
-    return d->nameFilters;
+    return m_nameFilters;
 }
 
 /*!
@@ -957,7 +939,7 @@ QStringList QAbstractFileEngineIterator::nameFilters() const
 */
 QDir::Filters QAbstractFileEngineIterator::filters() const
 {
-    return d->filters;
+    return m_filters;
 }
 
 /*!
@@ -1001,26 +983,11 @@ QString QAbstractFileEngineIterator::currentFilePath() const
 QFileInfo QAbstractFileEngineIterator::currentFileInfo() const
 {
     QString path = currentFilePath();
-    if (d->fileInfo.filePath() != path)
-        d->fileInfo.setFile(path);
+    if (m_fileInfo.filePath() != path)
+        m_fileInfo.setFile(path);
 
     // return a shallow copy
-    return d->fileInfo;
-}
-
-/*!
-    \internal
-
-    Returns the entry info \a type for this iterator's current directory entry
-    as a QVariant. If \a type is undefined for this entry, a null QVariant is
-    returned.
-
-    \sa QAbstractFileEngine::beginEntryList(), QDir::beginEntryList()
-*/
-QVariant QAbstractFileEngineIterator::entryInfo(EntryInfoType type) const
-{
-    Q_UNUSED(type);
-    return QVariant();
+    return m_fileInfo;
 }
 
 /*!

src/corelib/io/qabstractfileengine_p.h

@@ -191,7 +191,6 @@ public:
     virtual QAbstractFileEngine *create(const QString &fileName) const = 0;
 };
 
-class QAbstractFileEngineIteratorPrivate;
 class Q_CORE_EXPORT QAbstractFileEngineIterator
 {
 public:
@@ -201,6 +200,7 @@ public:
     virtual QString next() = 0;
     virtual bool hasNext() const = 0;
 
+    void setPath(const QString &path);
     QString path() const;
     QStringList nameFilters() const;
     QDir::Filters filters() const;
@@ -210,17 +210,17 @@ public:
     virtual QString currentFilePath() const;
 
 protected:
-    enum EntryInfoType {
-    };
-    virtual QVariant entryInfo(EntryInfoType type) const;
+    mutable QFileInfo m_fileInfo;
 
 private:
     Q_DISABLE_COPY_MOVE(QAbstractFileEngineIterator)
     friend class QDirIterator;
     friend class QDirIteratorPrivate;
     friend class QDirListingPrivate;
-    void setPath(const QString &path);
-    QScopedPointer<QAbstractFileEngineIteratorPrivate> d;
+
+    QDir::Filters m_filters;
+    QStringList m_nameFilters;
+    QString m_path;
 };
 
 class QAbstractFileEnginePrivate