Split QGeoTileCache for easier customization of the tile cache.

The QGeoTileCache is split into two classes:

The abstract class QAbstractGeoTileCache offers interfaces for inserting
and getting tiles, as well as getting cache status information such as
used texture memory.

The new class QGeoFileTileCache implements QAbstractGeoTileCache and offers
a file based caching implementation (the implementation is the same
as before splitting the class).

Change-Id: I2eab7491d489ac5b251c1296b67688901f5cc7d7
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

1 files changed, 123 insertions, 0 deletions

diff --git a/src/location/maps/qabstractgeotilecache_p.h b/src/location/maps/qabstractgeotilecache_p.h
new file mode 100644
index 00000000..a679b430
--- /dev/null
+++ b/src/location/maps/qabstractgeotilecache_p.h
@@ -0,0 +1,123 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the QtLocation module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QABSTRACTGEOTILECACHE_P_H
+#define QABSTRACTGEOTILECACHE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <QtLocation/qlocationglobal.h>
+
+#include <QObject>
+#include <QCache>
+#include "qcache3q_p.h"
+#include <QSet>
+#include <QMutex>
+#include <QTimer>
+
+#include "qgeotilespec_p.h"
+#include "qgeotiledmappingmanagerengine_p.h"
+
+#include <QImage>
+
+QT_BEGIN_NAMESPACE
+
+class QGeoMappingManager;
+
+class QGeoTile;
+class QAbstractGeoTileCache;
+
+class QThread;
+
+/* This is also used in the mapgeometry */
+class Q_LOCATION_EXPORT QGeoTileTexture
+{
+public:
+
+    QGeoTileTexture();
+    ~QGeoTileTexture();
+
+    QGeoTileSpec spec;
+    QImage image;
+    bool textureBound;
+};
+
+class Q_LOCATION_EXPORT QAbstractGeoTileCache : public QObject
+{
+    Q_OBJECT
+public:
+    QAbstractGeoTileCache(QObject *parent = 0);
+    virtual ~QAbstractGeoTileCache();
+
+    virtual void setMaxDiskUsage(int diskUsage);
+    virtual int maxDiskUsage() const;
+    virtual int diskUsage() const;
+
+    virtual void setMaxMemoryUsage(int memoryUsage);
+    virtual int maxMemoryUsage() const;
+    virtual int memoryUsage() const;
+
+    virtual void setMinTextureUsage(int textureUsage) = 0;
+    virtual void setExtraTextureUsage(int textureUsage) = 0;
+    virtual int maxTextureUsage() const = 0;
+    virtual int minTextureUsage() const = 0;
+    virtual int textureUsage() const = 0;
+
+    virtual QSharedPointer<QGeoTileTexture> get(const QGeoTileSpec &spec) = 0;
+
+    virtual void insert(const QGeoTileSpec &spec,
+                const QByteArray &bytes,
+                const QString &format,
+                QGeoTiledMappingManagerEngine::CacheAreas areas = QGeoTiledMappingManagerEngine::AllCaches) = 0;
+    virtual void handleError(const QGeoTileSpec &spec, const QString &errorString);
+
+    static QString baseCacheDirectory();
+
+protected:
+    virtual void printStats() = 0;
+};
+
+QT_END_NAMESPACE
+
+#endif // QABSTRACTGEOTILECACHE_P_H