bool QgsGeometryEditUtils::deleteRing( QgsAbstractGeometry *geom, int ringNum, int partNum )
{
if ( !geom || partNum < 0 )
{
return false;
}
if ( ringNum < 1 ) //cannot remove exterior ring
{
return false;
}
QgsAbstractGeometry *g = geom;
QgsGeometryCollection *c = qgsgeometry_cast<QgsGeometryCollection *>( geom );
if ( c )
{
g = c->geometryN( partNum );
}
else if ( partNum > 0 )
{
//part num specified, but not a multi part geometry type
return false;
}
QgsCurvePolygon *cpoly = qgsgeometry_cast<QgsCurvePolygon *>( g );
if ( !cpoly )
{
return false;
}
return cpoly->removeInteriorRing( ringNum - 1 );
}
static bool lwcollection_make_geos_friendly( QgsGeometryCollection &g )
{
for ( int i = 0; i < g.numGeometries(); i++ )
{
if ( !lwgeom_make_geos_friendly( *g.geometryN( i ) ) )
return false;
}
return true;
}
QgsGeometry::OperationResult QgsGeometryEditUtils::addRing( QgsAbstractGeometry *geom, std::unique_ptr<QgsCurve> ring )
{
if ( !ring )
{
return QgsGeometry::InvalidInput;
}
QList< QgsCurvePolygon * > polygonList;
QgsCurvePolygon *curvePoly = qgsgeometry_cast< QgsCurvePolygon * >( geom );
QgsGeometryCollection *multiGeom = qgsgeometry_cast< QgsGeometryCollection * >( geom );
if ( curvePoly )
{
polygonList.append( curvePoly );
}
else if ( multiGeom )
{
polygonList.reserve( multiGeom->numGeometries() );
for ( int i = 0; i < multiGeom->numGeometries(); ++i )
{
polygonList.append( qgsgeometry_cast< QgsCurvePolygon * >( multiGeom->geometryN( i ) ) );
}
}
else
{
return QgsGeometry::InvalidInput; //not polygon / multipolygon;
}
//ring must be closed
if ( !ring->isClosed() )
{
return QgsGeometry::AddRingNotClosed;
}
else if ( !ring->isRing() )
{
return QgsGeometry::AddRingNotValid;
}
std::unique_ptr<QgsGeometryEngine> ringGeom( QgsGeometry::createGeometryEngine( ring.get() ) );
ringGeom->prepareGeometry();
//for each polygon, test if inside outer ring and no intersection with other interior ring
QList< QgsCurvePolygon * >::const_iterator polyIter = polygonList.constBegin();
for ( ; polyIter != polygonList.constEnd(); ++polyIter )
{
if ( ringGeom->within( *polyIter ) )
{
//check if disjoint with other interior rings
int nInnerRings = ( *polyIter )->numInteriorRings();
for ( int i = 0; i < nInnerRings; ++i )
{
if ( !ringGeom->disjoint( ( *polyIter )->interiorRing( i ) ) )
{
return QgsGeometry::AddRingCrossesExistingRings;
}
}
//make sure dimensionality of ring matches geometry
if ( QgsWkbTypes::hasZ( geom->wkbType() ) )
ring->addZValue( 0 );
if ( QgsWkbTypes::hasM( geom->wkbType() ) )
ring->addMValue( 0 );
( *polyIter )->addInteriorRing( ring.release() );
return QgsGeometry::Success; //success
}
}
return QgsGeometry::AddRingNotInExistingFeature; //not contained in any outer ring
}
