KItemViews: Internal directory restructuration

- Move all private headers from the kitemviews-directory into
the 'private' subdirectory.

- Get rid of DolphinDirLister and just use a directory-lister
  internally in KFileItemModel.

- Minor interface-cleanups for signals

1 files changed, 82 insertions, 0 deletions

diff --git a/src/kitemviews/private/knepomukrolesprovider.h b/src/kitemviews/private/knepomukrolesprovider.h
new file mode 100644
index 000000000..46a78d4ee
--- /dev/null
+++ b/src/kitemviews/private/knepomukrolesprovider.h
@@ -0,0 +1,82 @@
+/***************************************************************************
+ *   Copyright (C) 2012 by Peter Penz <[email protected]>             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#ifndef KNEPOMUKROLESPROVIDER_H
+#define KNEPOMUKROLESPROVIDER_H
+
+#include <libdolphin_export.h>
+
+#include <QHash>
+#include <QSet>
+#include <QUrl>
+
+namespace Nepomuk
+{
+    class Resource;
+}
+
+/**
+ * @brief Allows accessing metadata of a file by providing KFileItemModel roles.
+ *
+ * Is a helper class for KFileItemModelRolesUpdater to retrieve roles that
+ * are only accessible with Nepomuk.
+ */
+class LIBDOLPHINPRIVATE_EXPORT KNepomukRolesProvider
+{
+public:
+    static KNepomukRolesProvider& instance();
+    virtual ~KNepomukRolesProvider();
+
+    /**
+     * @return Roles that can be provided by KNepomukRolesProvider.
+     */
+    QSet<QByteArray> roles() const;
+
+    /**
+     * @return Values for the roles \a roles that can be determined from the file
+     *         with the URL \a url.
+     */
+    QHash<QByteArray, QVariant> roleValues(const Nepomuk::Resource& resource,
+                                           const QSet<QByteArray>& roles) const;
+
+protected:
+    KNepomukRolesProvider();
+
+private:
+    /**
+     * @return User visible string for the given tag-values.
+     */
+    QString tagsFromValues(const QStringList& values) const;
+
+    /**
+     * @return User visible string for the EXIF-orientation property
+     *         which can have the values 0 to 8.
+     *         (see http://sylvana.net/jpegcrop/exif_orientation.html)
+     */
+    QString orientationFromValue(int value) const;
+
+private:
+    QSet<QByteArray> m_roles;
+    QHash<QUrl, QByteArray> m_roleForUri;
+
+    friend class KNepomukRolesProviderSingleton;
+};
+
+#endif
+