Add multipart option for processing geometry parameter

python/core/auto_generated/processing/qgsprocessingparameters.sip.in

@@ -1650,12 +1650,13 @@ A geometry parameter for processing algorithms.
 %End
   public:
 
-    QgsProcessingParameterGeometry( const QString &name, const QString &description = QString(), const QVariant &defaultValue = QVariant(), bool optional = false, const QList< int > &geometryTypes = QList< int >() );
+    QgsProcessingParameterGeometry( const QString &name, const QString &description = QString(), const QVariant &defaultValue = QVariant(), bool optional = false, const QList< int > &geometryTypes = QList< int >(), bool allowMultipart = true );
 %Docstring
 Constructor for QgsProcessingParameterGeometry.
 
 The ``geometryTypes`` argument allows for specifying a list of geometry types (see QgsWkbTypes.GeometryType) acceptable for this
 parameter. Passing a empty list will allow for any type of geometry.
+The ``allowMultiPart`` argument allows specifying a multi part geometry
 %End
 
     static QString typeName();
@@ -1692,6 +1693,22 @@ Sets the allowed  ``geometryTypes``, as a list of QgsWkbTypes.GeometryType value
 .. seealso:: :py:func:`geometryTypes`
 %End
 
+    bool  allowMultipart() const;
+%Docstring
+Returns the parameter allow multipart geometries.
+
+.. seealso:: :py:func:`setAllowMultipart`
+%End
+
+    void setAllowMultipart( bool allowMultipart );
+%Docstring
+Sets the allow multipart geometries
+
+.. seealso:: :py:func:`allowMultipart`
+%End
+
+
+
     static QgsProcessingParameterGeometry *fromScriptCode( const QString &name, const QString &description, bool isOptional, const QString &definition ) /Factory/;
 %Docstring
 Creates a new parameter using the definition from a script code.

python/plugins/processing/core/parameters.py

@@ -140,6 +140,8 @@ def getParameterFromString(s, context=''):
                         params[4] = [int(p) for p in params[4].split(';')]
                     except:
                         params[4] = [getattr(QgsWkbTypes, p.split(".")[1]) for p in params[4].split(';')]
+                if len(params) > 5:
+                    params[5] = True if params[5].lower() == 'true' else False
             elif clazz == QgsProcessingParameterCrs:
                 if len(params) > 3:
                     params[3] = True if params[3].lower() == 'true' else False

src/core/processing/qgsprocessingparameters.cpp

@@ -2959,9 +2959,10 @@ QgsProcessingParameterPoint *QgsProcessingParameterPoint::fromScriptCode( const
 }
 
 QgsProcessingParameterGeometry::QgsProcessingParameterGeometry( const QString &name, const QString &description,
-    const QVariant &defaultValue, bool optional, const QList<int> &geometryTypes )
+    const QVariant &defaultValue, bool optional, const QList<int> &geometryTypes, bool allowMultipart )
   : QgsProcessingParameterDefinition( name, description, defaultValue, optional ),
-    mGeomTypes( geometryTypes )
+    mGeomTypes( geometryTypes ),
+    mAllowMultipart( allowMultipart )
 {
 
 }
@@ -2985,12 +2986,14 @@ bool QgsProcessingParameterGeometry::checkValueIsAcceptable( const QVariant &inp
 
   if ( input.canConvert< QgsGeometry >() )
   {
-    return anyTypeAllowed || mGeomTypes.contains( input.value<QgsGeometry>().type() );
+    return ( anyTypeAllowed || mGeomTypes.contains( input.value<QgsGeometry>().type() ) ) &&
+           ( mAllowMultipart || !input.value<QgsGeometry>().isMultipart() );
   }
 
   if ( input.canConvert< QgsReferencedGeometry >() )
   {
-    return anyTypeAllowed || mGeomTypes.contains( input.value<QgsReferencedGeometry>().type() );
+    return ( anyTypeAllowed || mGeomTypes.contains( input.value<QgsReferencedGeometry>().type() ) ) &&
+           ( mAllowMultipart || !input.value<QgsReferencedGeometry>().isMultipart() );
   }
 
   if ( input.canConvert< QgsPointXY >() )
@@ -3028,7 +3031,7 @@ bool QgsProcessingParameterGeometry::checkValueIsAcceptable( const QVariant &inp
     QgsGeometry g = QgsGeometry::fromWkt( match.captured( 2 ) );
     if ( ! g.isNull() )
     {
-      return anyTypeAllowed || mGeomTypes.contains( g.type() );
+      return ( anyTypeAllowed || mGeomTypes.contains( g.type() ) ) && ( mAllowMultipart || !g.isMultipart() );
     }
     else
     {
@@ -3123,7 +3126,7 @@ QString QgsProcessingParameterGeometry::asScriptCode() const
         break;
 
       default:
-        code += QLatin1String( "unknown" );
+        code += QLatin1String( "unknown " );
         break;
     }
   }
@@ -3175,6 +3178,11 @@ QString QgsProcessingParameterGeometry::asPythonString( const QgsProcessing::Pyt
         code += QStringLiteral( ", geometryTypes=[%1 ]" ).arg( options.join( ',' ) );
       }
 
+      if ( ! mAllowMultipart )
+      {
+        code += QStringLiteral( ", allowMultipart=False" );
+      }
+
       QgsProcessingContext c;
       code += QStringLiteral( ", defaultValue=%1)" ).arg( valueAsPythonString( mDefault, c ) );
       return code;
@@ -3192,6 +3200,7 @@ QVariantMap QgsProcessingParameterGeometry::toVariantMap() const
     types << type;
   }
   map.insert( QStringLiteral( "geometrytypes" ), types );
+  map.insert( QStringLiteral( "multipart" ), mAllowMultipart );
   return map;
 }
 
@@ -3204,6 +3213,7 @@ bool QgsProcessingParameterGeometry::fromVariantMap( const QVariantMap &map )
   {
     mGeomTypes << val.toInt();
   }
+  mAllowMultipart = map.value( QStringLiteral( "multipart" ) ).toBool();
   return true;
 }
 

src/core/processing/qgsprocessingparameters.h

@@ -1687,8 +1687,9 @@ class CORE_EXPORT QgsProcessingParameterGeometry : public QgsProcessingParameter
      *
      * The \a geometryTypes argument allows for specifying a list of geometry types (see QgsWkbTypes::GeometryType) acceptable for this
      * parameter. Passing a empty list will allow for any type of geometry.
+     * The \a allowMultiPart argument allows specifying a multi part geometry
      */
-    QgsProcessingParameterGeometry( const QString &name, const QString &description = QString(), const QVariant &defaultValue = QVariant(), bool optional = false, const QList< int > &geometryTypes = QList< int >() );
+    QgsProcessingParameterGeometry( const QString &name, const QString &description = QString(), const QVariant &defaultValue = QVariant(), bool optional = false, const QList< int > &geometryTypes = QList< int >(), bool allowMultipart = true );
 
     /**
      * Returns the type name for the parameter class.
@@ -1715,6 +1716,20 @@ class CORE_EXPORT QgsProcessingParameterGeometry : public QgsProcessingParameter
      */
     void setGeometryTypes( const QList<int> &geometryTypes ) { mGeomTypes = geometryTypes; }
 
+    /**
+    * Returns the parameter allow multipart geometries.
+    * \see setAllowMultipart()
+    */
+    bool  allowMultipart() const { return mAllowMultipart; }
+
+    /**
+     * Sets the allow multipart geometries
+     * \see allowMultipart()
+     */
+    void setAllowMultipart( bool allowMultipart ) { mAllowMultipart = allowMultipart; }
+
+
+
     /**
      * Creates a new parameter using the definition from a script code.
      */
@@ -1723,6 +1738,7 @@ class CORE_EXPORT QgsProcessingParameterGeometry : public QgsProcessingParameter
   private:
 
     QList<int> mGeomTypes;
+    bool mAllowMultipart;
 
 };
 

tests/src/analysis/testqgsprocessing.cpp

@@ -3434,6 +3434,7 @@ void TestQgsProcessing::parameterGeometry()
   QVERIFY( def->checkValueIsAcceptable( QgsReferencedPointXY( QgsPointXY( 1, 2 ), QgsCoordinateReferenceSystem( "EPSG:4326" ) ) ) );
   QVERIFY( def->checkValueIsAcceptable( QgsRectangle( 10, 10, 20, 20 ) ) );
   QVERIFY( def->checkValueIsAcceptable( QgsReferencedRectangle( QgsRectangle( 10, 10, 20, 20 ), QgsCoordinateReferenceSystem( "EPSG:4326" ) ) ) );
+  QVERIFY( def->checkValueIsAcceptable( QString( "MultiPoint((10 10), (20 20))" ) ) );
 
   // string representing a geometry
   QVariantMap params;
@@ -3601,9 +3602,32 @@ void TestQgsProcessing::parameterGeometry()
   QCOMPARE( fromMap2.flags(), def->flags() );
   QCOMPARE( fromMap2.defaultValue(), def->defaultValue() );
   QCOMPARE( fromMap2.geometryTypes(), def->geometryTypes() );
+  QCOMPARE( fromMap2.allowMultipart(), def->allowMultipart() );
   def.reset( dynamic_cast< QgsProcessingParameterGeometry *>( QgsProcessingParameters::parameterFromVariantMap( map2 ) ) );
   QVERIFY( dynamic_cast< QgsProcessingParameterGeometry *>( def.get() ) );
 
+  // not multipart
+  def.reset( new QgsProcessingParameterGeometry( "not_multipart", QString(), QString( "Point(-1 3)" ), false, {}, false ) );
+  QVERIFY( !def->allowMultipart() );
+  QVERIFY( !def->checkValueIsAcceptable( QString( "MultiPoint((10 10), (20 20))" ) ) );
+  QVERIFY( !def->checkValueIsAcceptable( QgsGeometry::fromWkt( QStringLiteral( "MultiPoint((10 10), (20 20))" ) ) ) );
+  QVERIFY( def->checkValueIsAcceptable( QgsGeometry::fromPointXY( QgsPointXY( 1, 2 ) ) ) );
+
+  pythonCode = def->asPythonString();
+  QCOMPARE( pythonCode, QStringLiteral( "QgsProcessingParameterGeometry('not_multipart', '', allowMultipart=False, defaultValue='Point(-1 3)')" ) );
+
+  QVariantMap map3 = def->toVariantMap();
+  QgsProcessingParameterGeometry fromMap3( "x" );
+  QVERIFY( fromMap3.fromVariantMap( map3 ) );
+  QCOMPARE( fromMap3.allowMultipart(), false );
+
+  std::unique_ptr< QgsProcessingParameterGeometry > cloned( dynamic_cast< QgsProcessingParameterGeometry *>( def->clone() ) );
+  QCOMPARE( cloned->name(), def->name() );
+  QCOMPARE( cloned->description(), def->description() );
+  QCOMPARE( cloned->flags(), def->flags() );
+  QCOMPARE( cloned->defaultValue(), def->defaultValue() );
+  QCOMPARE( cloned->geometryTypes(), def->geometryTypes() );
+  QCOMPARE( cloned->allowMultipart(), def->allowMultipart() );
 
 }