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qgsgeometrycollection.cpp
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qgsgeometrycollection.cpp
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/***************************************************************************
qgsgeometrycollection.cpp
-------------------------------------------------------------------
Date : 28 Oct 2014
Copyright : (C) 2014 by Marco Hugentobler
email : marco.hugentobler at sourcepole dot com
***************************************************************************
* *
* 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. *
* *
***************************************************************************/
#include "qgsgeometrycollection.h"
#include "qgsapplication.h"
#include "qgsgeometryfactory.h"
#include "qgsgeometryutils.h"
#include "qgscircularstring.h"
#include "qgscompoundcurve.h"
#include "qgslinestring.h"
#include "qgsmultilinestring.h"
#include "qgspoint.h"
#include "qgsmultipoint.h"
#include "qgspolygon.h"
#include "qgsmultipolygon.h"
#include "qgswkbptr.h"
#include <memory>
QgsGeometryCollection::QgsGeometryCollection()
{
mWkbType = QgsWkbTypes::GeometryCollection;
}
QgsGeometryCollection::QgsGeometryCollection( const QgsGeometryCollection &c ): QgsAbstractGeometry( c )
{
int nGeoms = c.mGeometries.size();
mGeometries.resize( nGeoms );
for ( int i = 0; i < nGeoms; ++i )
{
mGeometries[i] = c.mGeometries.at( i )->clone();
}
}
QgsGeometryCollection &QgsGeometryCollection::operator=( const QgsGeometryCollection &c )
{
if ( &c != this )
{
clearCache();
QgsAbstractGeometry::operator=( c );
int nGeoms = c.mGeometries.size();
mGeometries.resize( nGeoms );
for ( int i = 0; i < nGeoms; ++i )
{
mGeometries[i] = c.mGeometries.at( i )->clone();
}
}
return *this;
}
QgsGeometryCollection::~QgsGeometryCollection()
{
clear();
}
bool QgsGeometryCollection::operator==( const QgsAbstractGeometry &other ) const
{
const QgsGeometryCollection *otherCollection = qgsgeometry_cast< const QgsGeometryCollection * >( &other );
if ( !otherCollection )
return false;
if ( mWkbType != otherCollection->mWkbType )
return false;
if ( mGeometries.count() != otherCollection->mGeometries.count() )
return false;
for ( int i = 0; i < mGeometries.count(); ++i )
{
if ( mGeometries.at( i ) != otherCollection->mGeometries.at( i ) )
return false;
}
return true;
}
bool QgsGeometryCollection::operator!=( const QgsAbstractGeometry &other ) const
{
return !operator==( other );
}
QgsGeometryCollection *QgsGeometryCollection::createEmptyWithSameType() const
{
auto result = qgis::make_unique< QgsGeometryCollection >();
result->mWkbType = mWkbType;
return result.release();
}
QgsGeometryCollection *QgsGeometryCollection::clone() const
{
return new QgsGeometryCollection( *this );
}
void QgsGeometryCollection::clear()
{
qDeleteAll( mGeometries );
mGeometries.clear();
clearCache(); //set bounding box invalid
}
QgsGeometryCollection *QgsGeometryCollection::snappedToGrid( double hSpacing, double vSpacing, double dSpacing, double mSpacing ) const
{
std::unique_ptr<QgsGeometryCollection> result;
for ( auto geom : mGeometries )
{
std::unique_ptr<QgsAbstractGeometry> gridified { geom->snappedToGrid( hSpacing, vSpacing, dSpacing, mSpacing ) };
if ( gridified )
{
if ( !result )
result = std::unique_ptr<QgsGeometryCollection> { createEmptyWithSameType() };
result->mGeometries.append( gridified.release() );
}
}
return result.release();
}
bool QgsGeometryCollection::removeDuplicateNodes( double epsilon, bool useZValues )
{
bool result = false;
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
result = result || geom->removeDuplicateNodes( epsilon, useZValues );
}
return result;
}
QgsAbstractGeometry *QgsGeometryCollection::boundary() const
{
return nullptr;
}
void QgsGeometryCollection::adjacentVertices( QgsVertexId vertex, QgsVertexId &previousVertex, QgsVertexId &nextVertex ) const
{
if ( vertex.part < 0 || vertex.part >= mGeometries.count() )
{
previousVertex = QgsVertexId();
nextVertex = QgsVertexId();
return;
}
mGeometries.at( vertex.part )->adjacentVertices( vertex, previousVertex, nextVertex );
}
int QgsGeometryCollection::vertexNumberFromVertexId( QgsVertexId id ) const
{
if ( id.part < 0 || id.part >= mGeometries.count() )
return -1;
int number = 0;
int part = 0;
for ( QgsAbstractGeometry *geometry : mGeometries )
{
if ( part == id.part )
{
int partNumber = geometry->vertexNumberFromVertexId( QgsVertexId( 0, id.ring, id.vertex ) );
if ( partNumber == -1 )
return -1;
return number + partNumber;
}
else
{
number += geometry->nCoordinates();
}
part++;
}
return -1; // should not happen
}
int QgsGeometryCollection::numGeometries() const
{
return mGeometries.size();
}
const QgsAbstractGeometry *QgsGeometryCollection::geometryN( int n ) const
{
return mGeometries.value( n );
}
QgsAbstractGeometry *QgsGeometryCollection::geometryN( int n )
{
clearCache();
return mGeometries.value( n );
}
bool QgsGeometryCollection::isEmpty() const
{
if ( mGeometries.isEmpty() )
return true;
for ( QgsAbstractGeometry *geometry : mGeometries )
{
if ( !geometry->isEmpty() )
return false;
}
return true;
}
bool QgsGeometryCollection::addGeometry( QgsAbstractGeometry *g )
{
if ( !g )
{
return false;
}
mGeometries.append( g );
clearCache(); //set bounding box invalid
return true;
}
bool QgsGeometryCollection::insertGeometry( QgsAbstractGeometry *g, int index )
{
if ( !g )
{
return false;
}
index = std::min( mGeometries.count(), index );
mGeometries.insert( index, g );
clearCache(); //set bounding box invalid
return true;
}
bool QgsGeometryCollection::removeGeometry( int nr )
{
if ( nr >= mGeometries.size() || nr < 0 )
{
return false;
}
delete mGeometries.at( nr );
mGeometries.remove( nr );
clearCache(); //set bounding box invalid
return true;
}
int QgsGeometryCollection::dimension() const
{
int maxDim = 0;
QVector< QgsAbstractGeometry * >::const_iterator it = mGeometries.constBegin();
for ( ; it != mGeometries.constEnd(); ++it )
{
int dim = ( *it )->dimension();
if ( dim > maxDim )
{
maxDim = dim;
}
}
return maxDim;
}
QString QgsGeometryCollection::geometryType() const
{
return QStringLiteral( "GeometryCollection" );
}
void QgsGeometryCollection::transform( const QgsCoordinateTransform &ct, QgsCoordinateTransform::TransformDirection d, bool transformZ )
{
for ( QgsAbstractGeometry *g : qgis::as_const( mGeometries ) )
{
g->transform( ct, d, transformZ );
}
clearCache(); //set bounding box invalid
}
void QgsGeometryCollection::transform( const QTransform &t, double zTranslate, double zScale, double mTranslate, double mScale )
{
for ( QgsAbstractGeometry *g : qgis::as_const( mGeometries ) )
{
g->transform( t, zTranslate, zScale, mTranslate, mScale );
}
clearCache(); //set bounding box invalid
}
void QgsGeometryCollection::draw( QPainter &p ) const
{
QVector< QgsAbstractGeometry * >::const_iterator it = mGeometries.constBegin();
for ( ; it != mGeometries.constEnd(); ++it )
{
( *it )->draw( p );
}
}
bool QgsGeometryCollection::fromWkb( QgsConstWkbPtr &wkbPtr )
{
if ( !wkbPtr )
{
return false;
}
QgsWkbTypes::Type wkbType = wkbPtr.readHeader();
if ( QgsWkbTypes::flatType( wkbType ) != QgsWkbTypes::flatType( mWkbType ) )
return false;
mWkbType = wkbType;
int nGeometries = 0;
wkbPtr >> nGeometries;
QVector<QgsAbstractGeometry *> geometryListBackup = mGeometries;
mGeometries.clear();
for ( int i = 0; i < nGeometries; ++i )
{
std::unique_ptr< QgsAbstractGeometry > geom( QgsGeometryFactory::geomFromWkb( wkbPtr ) ); // also updates wkbPtr
if ( geom )
{
if ( !addGeometry( geom.release() ) )
{
qDeleteAll( mGeometries );
mGeometries = geometryListBackup;
return false;
}
}
}
qDeleteAll( geometryListBackup );
clearCache(); //set bounding box invalid
return true;
}
bool QgsGeometryCollection::fromWkt( const QString &wkt )
{
return fromCollectionWkt( wkt, QVector<QgsAbstractGeometry *>() << new QgsPoint << new QgsLineString << new QgsPolygon
<< new QgsCircularString << new QgsCompoundCurve
<< new QgsCurvePolygon
<< new QgsMultiPoint << new QgsMultiLineString
<< new QgsMultiPolygon << new QgsGeometryCollection
<< new QgsMultiCurve << new QgsMultiSurface, QStringLiteral( "GeometryCollection" ) );
}
QByteArray QgsGeometryCollection::asWkb() const
{
int binarySize = sizeof( char ) + sizeof( quint32 ) + sizeof( quint32 );
QVector<QByteArray> wkbForGeometries;
for ( const QgsAbstractGeometry *geom : mGeometries )
{
if ( geom )
{
QByteArray wkb( geom->asWkb() );
binarySize += wkb.length();
wkbForGeometries << wkb;
}
}
QByteArray wkbArray;
wkbArray.resize( binarySize );
QgsWkbPtr wkb( wkbArray );
wkb << static_cast<char>( QgsApplication::endian() );
wkb << static_cast<quint32>( wkbType() );
wkb << static_cast<quint32>( wkbForGeometries.count() );
for ( const QByteArray &wkbForGeometry : qgis::as_const( wkbForGeometries ) )
{
wkb << wkbForGeometry;
}
return wkbArray;
}
QString QgsGeometryCollection::asWkt( int precision ) const
{
QString wkt = wktTypeStr() + " (";
for ( const QgsAbstractGeometry *geom : mGeometries )
{
QString childWkt = geom->asWkt( precision );
if ( wktOmitChildType() )
{
childWkt = childWkt.mid( childWkt.indexOf( '(' ) );
}
wkt += childWkt + ',';
}
if ( wkt.endsWith( ',' ) )
{
wkt.chop( 1 ); // Remove last ','
}
wkt += ')';
return wkt;
}
QDomElement QgsGeometryCollection::asGml2( QDomDocument &doc, int precision, const QString &ns, const QgsAbstractGeometry::AxisOrder axisOrder ) const
{
QDomElement elemMultiGeometry = doc.createElementNS( ns, QStringLiteral( "MultiGeometry" ) );
for ( const QgsAbstractGeometry *geom : mGeometries )
{
QDomElement elemGeometryMember = doc.createElementNS( ns, QStringLiteral( "geometryMember" ) );
elemGeometryMember.appendChild( geom->asGml2( doc, precision, ns, axisOrder ) );
elemMultiGeometry.appendChild( elemGeometryMember );
}
return elemMultiGeometry;
}
QDomElement QgsGeometryCollection::asGml3( QDomDocument &doc, int precision, const QString &ns, const QgsAbstractGeometry::AxisOrder axisOrder ) const
{
QDomElement elemMultiGeometry = doc.createElementNS( ns, QStringLiteral( "MultiGeometry" ) );
for ( const QgsAbstractGeometry *geom : mGeometries )
{
QDomElement elemGeometryMember = doc.createElementNS( ns, QStringLiteral( "geometryMember" ) );
elemGeometryMember.appendChild( geom->asGml3( doc, precision, ns, axisOrder ) );
elemMultiGeometry.appendChild( elemGeometryMember );
}
return elemMultiGeometry;
}
QString QgsGeometryCollection::asJson( int precision ) const
{
QString json = QStringLiteral( "{\"type\": \"GeometryCollection\", \"geometries\": [" );
for ( const QgsAbstractGeometry *geom : mGeometries )
{
json += geom->asJson( precision ) + ", ";
}
if ( json.endsWith( QLatin1String( ", " ) ) )
{
json.chop( 2 ); // Remove last ", "
}
json += QLatin1String( "] }" );
return json;
}
QgsRectangle QgsGeometryCollection::boundingBox() const
{
if ( mBoundingBox.isNull() )
{
mBoundingBox = calculateBoundingBox();
}
return mBoundingBox;
}
QgsRectangle QgsGeometryCollection::calculateBoundingBox() const
{
if ( mGeometries.empty() )
{
return QgsRectangle();
}
QgsRectangle bbox = mGeometries.at( 0 )->boundingBox();
for ( int i = 1; i < mGeometries.size(); ++i )
{
QgsRectangle geomBox = mGeometries.at( i )->boundingBox();
bbox.combineExtentWith( geomBox );
}
return bbox;
}
void QgsGeometryCollection::clearCache() const
{
mBoundingBox = QgsRectangle();
QgsAbstractGeometry::clearCache();
}
QgsCoordinateSequence QgsGeometryCollection::coordinateSequence() const
{
QgsCoordinateSequence sequence;
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
QgsCoordinateSequence geomCoords = ( *geomIt )->coordinateSequence();
QgsCoordinateSequence::const_iterator cIt = geomCoords.constBegin();
for ( ; cIt != geomCoords.constEnd(); ++cIt )
{
sequence.push_back( *cIt );
}
}
return sequence;
}
int QgsGeometryCollection::nCoordinates() const
{
int count = 0;
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
count += ( *geomIt )->nCoordinates();
}
return count;
}
double QgsGeometryCollection::closestSegment( const QgsPoint &pt, QgsPoint &segmentPt, QgsVertexId &vertexAfter, int *leftOf, double epsilon ) const
{
return QgsGeometryUtils::closestSegmentFromComponents( mGeometries, QgsGeometryUtils::Part, pt, segmentPt, vertexAfter, leftOf, epsilon );
}
bool QgsGeometryCollection::nextVertex( QgsVertexId &id, QgsPoint &vertex ) const
{
if ( id.part < 0 )
{
id.part = 0;
id.ring = -1;
id.vertex = -1;
}
if ( mGeometries.isEmpty() )
{
return false;
}
if ( id.part >= mGeometries.count() )
return false;
QgsAbstractGeometry *geom = mGeometries.at( id.part );
if ( geom->nextVertex( id, vertex ) )
{
return true;
}
if ( ( id.part + 1 ) >= numGeometries() )
{
return false;
}
++id.part;
id.ring = -1;
id.vertex = -1;
return mGeometries.at( id.part )->nextVertex( id, vertex );
}
bool QgsGeometryCollection::insertVertex( QgsVertexId position, const QgsPoint &vertex )
{
if ( position.part >= mGeometries.size() )
{
return false;
}
bool success = mGeometries.at( position.part )->insertVertex( position, vertex );
if ( success )
{
clearCache(); //set bounding box invalid
}
return success;
}
bool QgsGeometryCollection::moveVertex( QgsVertexId position, const QgsPoint &newPos )
{
if ( position.part < 0 || position.part >= mGeometries.size() )
{
return false;
}
bool success = mGeometries.at( position.part )->moveVertex( position, newPos );
if ( success )
{
clearCache(); //set bounding box invalid
}
return success;
}
bool QgsGeometryCollection::deleteVertex( QgsVertexId position )
{
if ( position.part < 0 || position.part >= mGeometries.size() )
{
return false;
}
QgsAbstractGeometry *geom = mGeometries.at( position.part );
if ( !geom )
{
return false;
}
bool success = geom->deleteVertex( position );
//remove geometry if no vertices left
if ( geom->isEmpty() )
{
removeGeometry( position.part );
}
if ( success )
{
clearCache(); //set bounding box invalid
}
return success;
}
double QgsGeometryCollection::length() const
{
double length = 0.0;
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
length += ( *geomIt )->length();
}
return length;
}
double QgsGeometryCollection::area() const
{
double area = 0.0;
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
area += ( *geomIt )->area();
}
return area;
}
double QgsGeometryCollection::perimeter() const
{
double perimeter = 0.0;
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
perimeter += ( *geomIt )->perimeter();
}
return perimeter;
}
bool QgsGeometryCollection::fromCollectionWkt( const QString &wkt, const QVector<QgsAbstractGeometry *> &subtypes, const QString &defaultChildWkbType )
{
clear();
QPair<QgsWkbTypes::Type, QString> parts = QgsGeometryUtils::wktReadBlock( wkt );
if ( QgsWkbTypes::flatType( parts.first ) != QgsWkbTypes::flatType( wkbType() ) )
{
qDeleteAll( subtypes );
return false;
}
mWkbType = parts.first;
QString defChildWkbType = QStringLiteral( "%1%2%3 " ).arg( defaultChildWkbType, is3D() ? "Z" : "", isMeasure() ? "M" : "" );
const QStringList blocks = QgsGeometryUtils::wktGetChildBlocks( parts.second, defChildWkbType );
for ( const QString &childWkt : blocks )
{
QPair<QgsWkbTypes::Type, QString> childParts = QgsGeometryUtils::wktReadBlock( childWkt );
bool success = false;
for ( const QgsAbstractGeometry *geom : subtypes )
{
if ( QgsWkbTypes::flatType( childParts.first ) == QgsWkbTypes::flatType( geom->wkbType() ) )
{
mGeometries.append( geom->clone() );
if ( mGeometries.back()->fromWkt( childWkt ) )
{
success = true;
break;
}
}
}
if ( !success )
{
clear();
qDeleteAll( subtypes );
return false;
}
}
qDeleteAll( subtypes );
//scan through geometries and check if dimensionality of geometries is different to collection.
//if so, update the type dimensionality of the collection to match
bool hasZ = false;
bool hasM = false;
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
hasZ = hasZ || geom->is3D();
hasM = hasM || geom->isMeasure();
if ( hasZ && hasM )
break;
}
if ( hasZ )
addZValue( 0 );
if ( hasM )
addMValue( 0 );
return true;
}
bool QgsGeometryCollection::hasCurvedSegments() const
{
QVector< QgsAbstractGeometry * >::const_iterator it = mGeometries.constBegin();
for ( ; it != mGeometries.constEnd(); ++it )
{
if ( ( *it )->hasCurvedSegments() )
{
return true;
}
}
return false;
}
QgsAbstractGeometry *QgsGeometryCollection::segmentize( double tolerance, SegmentationToleranceType toleranceType ) const
{
std::unique_ptr< QgsAbstractGeometry > geom( QgsGeometryFactory::geomFromWkbType( mWkbType ) );
QgsGeometryCollection *geomCollection = qgsgeometry_cast<QgsGeometryCollection *>( geom.get() );
if ( !geomCollection )
{
return clone();
}
QVector< QgsAbstractGeometry * >::const_iterator geomIt = mGeometries.constBegin();
for ( ; geomIt != mGeometries.constEnd(); ++geomIt )
{
geomCollection->addGeometry( ( *geomIt )->segmentize( tolerance, toleranceType ) );
}
return geom.release();
}
double QgsGeometryCollection::vertexAngle( QgsVertexId vertex ) const
{
if ( vertex.part < 0 || vertex.part >= mGeometries.size() )
{
return 0.0;
}
QgsAbstractGeometry *geom = mGeometries[vertex.part];
if ( !geom )
{
return 0.0;
}
return geom->vertexAngle( vertex );
}
double QgsGeometryCollection::segmentLength( QgsVertexId startVertex ) const
{
if ( startVertex.part < 0 || startVertex.part >= mGeometries.size() )
{
return 0.0;
}
const QgsAbstractGeometry *geom = mGeometries[startVertex.part];
if ( !geom )
{
return 0.0;
}
return geom->segmentLength( startVertex );
}
int QgsGeometryCollection::vertexCount( int part, int ring ) const
{
if ( part < 0 || part >= mGeometries.size() )
{
return 0;
}
return mGeometries[part]->vertexCount( 0, ring );
}
int QgsGeometryCollection::ringCount( int part ) const
{
if ( part < 0 || part >= mGeometries.size() )
{
return 0;
}
return mGeometries[part]->ringCount();
}
int QgsGeometryCollection::partCount() const
{
return mGeometries.size();
}
QgsPoint QgsGeometryCollection::vertexAt( QgsVertexId id ) const
{
return mGeometries[id.part]->vertexAt( id );
}
bool QgsGeometryCollection::addZValue( double zValue )
{
if ( QgsWkbTypes::hasZ( mWkbType ) )
return false;
mWkbType = QgsWkbTypes::addZ( mWkbType );
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
geom->addZValue( zValue );
}
clearCache();
return true;
}
bool QgsGeometryCollection::addMValue( double mValue )
{
if ( QgsWkbTypes::hasM( mWkbType ) )
return false;
mWkbType = QgsWkbTypes::addM( mWkbType );
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
geom->addMValue( mValue );
}
clearCache();
return true;
}
bool QgsGeometryCollection::dropZValue()
{
if ( mWkbType != QgsWkbTypes::GeometryCollection && !is3D() )
return false;
mWkbType = QgsWkbTypes::dropZ( mWkbType );
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
geom->dropZValue();
}
clearCache();
return true;
}
bool QgsGeometryCollection::dropMValue()
{
if ( mWkbType != QgsWkbTypes::GeometryCollection && !isMeasure() )
return false;
mWkbType = QgsWkbTypes::dropM( mWkbType );
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
geom->dropMValue();
}
clearCache();
return true;
}
void QgsGeometryCollection::swapXy()
{
for ( QgsAbstractGeometry *geom : qgis::as_const( mGeometries ) )
{
if ( geom )
geom->swapXy();
}
clearCache();
}
QgsGeometryCollection *QgsGeometryCollection::toCurveType() const
{
std::unique_ptr< QgsGeometryCollection > newCollection( new QgsGeometryCollection() );
for ( QgsAbstractGeometry *geom : mGeometries )
{
newCollection->addGeometry( geom->toCurveType() );
}
return newCollection.release();
}
bool QgsGeometryCollection::wktOmitChildType() const
{
return false;
}
int QgsGeometryCollection::childCount() const
{
return mGeometries.count();
}
QgsAbstractGeometry *QgsGeometryCollection::childGeometry( int index ) const
{
if ( index < 0 || index > mGeometries.count() )
return nullptr;
return mGeometries.at( index );
}