qgsalgorithmdropmzvalues.cpp

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/***************************************************************************
                         qgsalgorithmdropmzvalues.cpp
                         ---------------------
    begin                : April 2017
    copyright            : (C) 2017 by Nyall Dawson
    email                : nyall dot dawson at gmail 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 "qgsalgorithmdropmzvalues.h"
 
 
QString QgsDropMZValuesAlgorithm::name() const
{
  return QStringLiteral( "dropmzvalues" );
}
 
QString QgsDropMZValuesAlgorithm::displayName() const
{
  return QObject::tr( "Drop M/Z values" );
}
 
QStringList QgsDropMZValuesAlgorithm::tags() const
{
  return QObject::tr( "drop,set,convert,m,measure,z,25d,3d,values" ).split( ',' );
}
 
QString QgsDropMZValuesAlgorithm::group() const
{
  return QObject::tr( "Vector geometry" );
}
 
QString QgsDropMZValuesAlgorithm::groupId() const
{
  return QStringLiteral( "vectorgeometry" );
}
 
QString QgsDropMZValuesAlgorithm::outputName() const
{
  return QObject::tr( "Z/M Dropped" );
}
 
QString QgsDropMZValuesAlgorithm::shortHelpString() const
{
  return QObject::tr( "This algorithm can remove any measure (M) or Z values from input geometries." );
}
 
QgsDropMZValuesAlgorithm *QgsDropMZValuesAlgorithm::createInstance() const
{
  return new QgsDropMZValuesAlgorithm();
}
 
bool QgsDropMZValuesAlgorithm::supportInPlaceEdit( const QgsMapLayer *layer ) const
{
  Q_UNUSED( layer )
  return false;
}
 
void QgsDropMZValuesAlgorithm::initParameters( const QVariantMap & )
{
  addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "DROP_M_VALUES" ), QObject::tr( "Drop M Values" ), false ) );
  addParameter( new QgsProcessingParameterBoolean( QStringLiteral( "DROP_Z_VALUES" ), QObject::tr( "Drop Z Values" ), false ) );
}
 
QgsWkbTypes::Type QgsDropMZValuesAlgorithm::outputWkbType( QgsWkbTypes::Type inputWkbType ) const
{
  QgsWkbTypes::Type wkb = inputWkbType;
  if ( mDropM )
    wkb = QgsWkbTypes::dropM( wkb );
  if ( mDropZ )
    wkb = QgsWkbTypes::dropZ( wkb );
  return wkb;
}
 
QgsProcessingFeatureSource::Flag QgsDropMZValuesAlgorithm::sourceFlags() const
{
  return QgsProcessingFeatureSource::FlagSkipGeometryValidityChecks;
}
 
bool QgsDropMZValuesAlgorithm::prepareAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback * )
{
  mDropM = parameterAsBoolean( parameters, QStringLiteral( "DROP_M_VALUES" ), context );
  mDropZ = parameterAsBoolean( parameters, QStringLiteral( "DROP_Z_VALUES" ), context );
  return true;
}
 
QgsFeatureList QgsDropMZValuesAlgorithm::processFeature( const QgsFeature &feature, QgsProcessingContext &, QgsProcessingFeedback * )
{
  QgsFeature f = feature;
  if ( f.hasGeometry() )
  {
    std::unique_ptr< QgsAbstractGeometry > newGeom( f.geometry().constGet()->clone() );
    if ( mDropM )
      newGeom->dropMValue();
    if ( mDropZ )
      newGeom->dropZValue();
    f.setGeometry( QgsGeometry( newGeom.release() ) );
  }
 
  return QgsFeatureList() << f;
}