qgsogrutils.h

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/***************************************************************************
                             qgsogrutils.h
                             -------------
    begin                : February 2016
    copyright            : (C) 2016 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.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSOGRUTILS_H
#define QGSOGRUTILS_H
 
#define SIP_NO_FILE
 
#include "qgis_core.h"
#include "qgsfeature.h"
 
#include <ogr_api.h>
#include <gdal.h>
#include <gdalwarper.h>
#include "cpl_conv.h"
#include "cpl_string.h"
 
class QgsCoordinateReferenceSystem;
 
class QTextCodec;
 
namespace gdal
{
 
  struct OGRDataSourceDeleter
  {
 
    void CORE_EXPORT operator()( OGRDataSourceH source );
 
  };
 
  struct OGRGeometryDeleter
  {
 
    void CORE_EXPORT operator()( OGRGeometryH geometry );
 
  };
 
  struct OGRFldDeleter
  {
 
    void CORE_EXPORT operator()( OGRFieldDefnH definition );
 
  };
 
  struct OGRFeatureDeleter
  {
 
    void CORE_EXPORT operator()( OGRFeatureH feature );
 
  };
 
  struct GDALDatasetCloser
  {
 
    void CORE_EXPORT operator()( GDALDatasetH datasource );
 
  };
 
  struct GDALWarpOptionsDeleter
  {
 
    void CORE_EXPORT operator()( GDALWarpOptions *options );
 
  };
 
  using ogr_datasource_unique_ptr = std::unique_ptr< std::remove_pointer<OGRDataSourceH>::type, OGRDataSourceDeleter >;
 
  using ogr_geometry_unique_ptr = std::unique_ptr< std::remove_pointer<OGRGeometryH>::type, OGRGeometryDeleter >;
 
  using ogr_field_def_unique_ptr = std::unique_ptr< std::remove_pointer<OGRFieldDefnH>::type, OGRFldDeleter >;
 
  using ogr_feature_unique_ptr = std::unique_ptr< std::remove_pointer<OGRFeatureH>::type, OGRFeatureDeleter >;
 
  using dataset_unique_ptr = std::unique_ptr< std::remove_pointer<GDALDatasetH>::type, GDALDatasetCloser >;
 
  void CORE_EXPORT fast_delete_and_close( dataset_unique_ptr &dataset, GDALDriverH driver, const QString &path );
 
  using warp_options_unique_ptr = std::unique_ptr< GDALWarpOptions, GDALWarpOptionsDeleter >;
}
 
class CORE_EXPORT QgsOgrUtils
{
  public:
 
    static QVariant OGRFieldtoVariant( const OGRField *value, OGRFieldType type );
 
    static QgsFeature readOgrFeature( OGRFeatureH ogrFet, const QgsFields &fields, QTextCodec *encoding );
 
    static QgsFields readOgrFields( OGRFeatureH ogrFet, QTextCodec *encoding );
 
    static QVariant getOgrFeatureAttribute( OGRFeatureH ogrFet, const QgsFields &fields, int attIndex, QTextCodec *encoding, bool *ok = nullptr );
 
    static QVariant getOgrFeatureAttribute( OGRFeatureH ogrFet, const QgsField &field, int attIndex, QTextCodec *encoding, bool *ok = nullptr );
 
    static bool readOgrFeatureAttributes( OGRFeatureH ogrFet, const QgsFields &fields, QgsFeature &feature, QTextCodec *encoding );
 
    static bool readOgrFeatureGeometry( OGRFeatureH ogrFet, QgsFeature &feature );
 
    static QgsGeometry ogrGeometryToQgsGeometry( OGRGeometryH geom );
 
    static QgsFeatureList stringToFeatureList( const QString &string, const QgsFields &fields, QTextCodec *encoding );
 
    static QgsFields stringToFields( const QString &string, QTextCodec *encoding );
 
    static QStringList cStringListToQStringList( char **stringList );
 
    static QgsWkbTypes::Type ogrGeometryTypeToQgsWkbType( OGRwkbGeometryType ogrGeomType );
 
    static QString OGRSpatialReferenceToWkt( OGRSpatialReferenceH srs );
 
    static QgsCoordinateReferenceSystem OGRSpatialReferenceToCrs( OGRSpatialReferenceH srs );
 
    static OGRSpatialReferenceH crsToOGRSpatialReference( const QgsCoordinateReferenceSystem &crs );
 
    static QString readShapefileEncoding( const QString &path );
 
    static QString readShapefileEncodingFromCpg( const QString &path );
 
    static QString readShapefileEncodingFromLdid( const QString &path );
 
    static QVariantMap parseStyleString( const QString &string );
 
    static std::unique_ptr< QgsSymbol > symbolFromStyleString( const QString &string, Qgis::SymbolType type ) SIP_FACTORY;
};
 
#endif // QGSOGRUTILS_H