QGeoTiledMappingManagerEngineQGC.cpp

/****************************************************************************
**
** Copyright (C) 2013 Aaron McCarthy <mccarthy.aaron@gmail.com>
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtLocation module of the Qt Toolkit.
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** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
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** General Public License version 3.0 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 3.0 requirements will be
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** 2015.4.4
** Adapted for use with QGroundControl
**
** Gus Grubba <mavlink@grubba.com>
**
****************************************************************************/

#include "QGCMapEngine.h"
#include "QGeoTiledMappingManagerEngineQGC.h"
#include "QGeoTileFetcherQGC.h"

#include <QtLocation/private/qgeocameracapabilities_p.h>
#include <QtLocation/private/qgeomaptype_p.h>
#if QT_VERSION < QT_VERSION_CHECK(5, 5, 0)
#include <QtLocation/private/qgeotiledmapdata_p.h>
#else
#include <QtLocation/private/qgeotiledmap_p.h>
#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
#include <QtLocation/private/qgeofiletilecache_p.h>
#else
#include <QtLocation/private/qgeotilecache_p.h>
#endif
#endif

#include <QDir>
#include <QStandardPaths>

#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
//-----------------------------------------------------------------------------
QGeoTiledMapQGC::QGeoTiledMapQGC(QGeoTiledMappingManagerEngine *engine, QObject *parent)
    : QGeoTiledMap(engine, parent)
{

}
#endif

//-----------------------------------------------------------------------------
QGeoTiledMappingManagerEngineQGC::QGeoTiledMappingManagerEngineQGC(const QVariantMap &parameters, QGeoServiceProvider::Error *error, QString *errorString)
:   QGeoTiledMappingManagerEngine()
{

    QGeoCameraCapabilities cameraCaps;
    cameraCaps.setMinimumZoomLevel(2.0);
    cameraCaps.setMaximumZoomLevel(MAX_MAP_ZOOM);
    cameraCaps.setSupportsBearing(true);
    setCameraCapabilities(cameraCaps);

    setTileSize(QSize(256, 256));

    // In Qt 5.10 QGeoMapType need QGeoCameraCapabilities as argument
    // E.g: https://github.com/qt/qtlocation/blob/2b230b0a10d898979e9d5193f4da2e408b397fe3/src/plugins/geoservices/osm/qgeotiledmappingmanagerengineosm.cpp#L167
    #if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
    #define QGCGEOMAPTYPE(a,b,c,d,e,f)  QGeoMapType(a,b,c,d,e,f,QByteArray("QGroundControl"), cameraCaps)
    #elif QT_VERSION >= QT_VERSION_CHECK(5, 9, 0)
    #define QGCGEOMAPTYPE(a,b,c,d,e,f)  QGeoMapType(a,b,c,d,e,f,QByteArray("QGroundControl"))
    #else
    #define QGCGEOMAPTYPE(a,b,c,d,e,f)  QGeoMapType(a,b,c,d,e,f)
    #endif

    /*
     * Google and Bing don't seem kosher at all. This was based on original code from OpenPilot and heavily modified to be used in QGC.
     */

    QList<QGeoMapType> mapList;
    QHashIterator<QString, MapProvider*> i(getQGCMapEngine()->urlFactory()->getProviderTable());

    while(i.hasNext()){
        i.next();

		if(!i.value()->_isElevationProvider()){
			mapList.append(QGCGEOMAPTYPE(i.value()->getMapStyle(), i.key(), i.key(), false, false, getQGCMapEngine()->urlFactory()->getIdFromType(i.key()) )); 
		}
    }
    setSupportedMapTypes(mapList);

    //-- Users (QML code) can define a different user agent
    if (parameters.contains(QStringLiteral("useragent"))) {
        getQGCMapEngine()->setUserAgent(parameters.value(QStringLiteral("useragent")).toString().toLatin1());
    }

#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
    _setCache(parameters);
#endif

    setTileFetcher(new QGeoTileFetcherQGC(this));

    *error = QGeoServiceProvider::NoError;
    errorString->clear();
}

//-----------------------------------------------------------------------------
QGeoTiledMappingManagerEngineQGC::~QGeoTiledMappingManagerEngineQGC()
{
}

#if QT_VERSION < QT_VERSION_CHECK(5, 5, 0)

//-----------------------------------------------------------------------------
QGeoMapData *QGeoTiledMappingManagerEngineQGC::createMapData()
{
    return new QGeoTiledMapData(this, 0);
}

#else

//-----------------------------------------------------------------------------
QGeoMap*
QGeoTiledMappingManagerEngineQGC::createMap()
{
    return new QGeoTiledMapQGC(this);
}

#endif

#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
//-----------------------------------------------------------------------------
void
QGeoTiledMappingManagerEngineQGC::_setCache(const QVariantMap &parameters)
{
    QString cacheDir;
    if (parameters.contains(QStringLiteral("mapping.cache.directory")))
        cacheDir = parameters.value(QStringLiteral("mapping.cache.directory")).toString();
    else {
        cacheDir = getQGCMapEngine()->getCachePath();
        if(!QFileInfo::exists(cacheDir)) {
            if(!QDir::root().mkpath(cacheDir)) {
                qWarning() << "Could not create mapping disk cache directory: " << cacheDir;
                cacheDir = QDir::homePath() + QStringLiteral("/.qgcmapscache/");
            }
        }
    }
    if(!QFileInfo::exists(cacheDir)) {
        if(!QDir::root().mkpath(cacheDir)) {
            qWarning() << "Could not create mapping disk cache directory: " << cacheDir;
            cacheDir.clear();
        }
    }
    //-- Memory Cache
    uint32_t memLimit = 0;
    if (parameters.contains(QStringLiteral("mapping.cache.memory.size"))) {
      bool ok = false;
      memLimit = parameters.value(QStringLiteral("mapping.cache.memory.size")).toString().toUInt(&ok);
      if (!ok)
          memLimit = 0;
    }
    if(!memLimit)
    {
        //-- Value saved in MB
        memLimit = getQGCMapEngine()->getMaxMemCache() * (1024 * 1024);
    }
    //-- It won't work with less than 1M of memory cache
    if(memLimit < 1024 * 1024)
        memLimit = 1024 * 1024;
    //-- On the other hand, Qt uses signed 32-bit integers. Limit to 1G to round it down (you don't need more than that).
    if(memLimit > 1024 * 1024 * 1024)
        memLimit = 1024 * 1024 * 1024;
    //-- Disable Qt's disk cache (sort of)
#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
    QAbstractGeoTileCache *pTileCache = new QGeoFileTileCache(cacheDir);
    setTileCache(pTileCache);
#else
    QGeoTileCache* pTileCache = createTileCacheWithDir(cacheDir);
#endif
    if(pTileCache)
    {
        //-- We're basically telling it to use 100k of disk for cache. It doesn't like
        //   values smaller than that and I could not find a way to make it NOT cache.
        //   We handle our own disk caching elsewhere.
        pTileCache->setMaxDiskUsage(1024 * 100);
        pTileCache->setMaxMemoryUsage(memLimit);
    }
}
#endif