First test with Qvariant QgsGeometry*

Author: rldhont

src/core/qgsexpression.cpp

@@ -757,6 +757,37 @@ static QVariant fcnYat( const QVariantList& values, QgsFeature* f, QgsExpression
   else
     return QVariant();
 }
+static QVariant fcnGeometry( const QVariantList& , QgsFeature* f, QgsExpression* )
+{
+  QgsGeometry* geom = f->geometry();
+  if ( geom )
+    return  QVariant::fromValue( geom );
+  else
+    return QVariant();
+}
+static QVariant fcnGeomFromWKT( const QVariantList& values, QgsFeature*, QgsExpression* parent )
+{
+  QString wkt = getStringValue( values.at( 0 ), parent );  
+  QgsGeometry* geom = QgsGeometry::fromWkt( wkt );
+  if ( geom )
+    return QVariant::fromValue( geom );
+  else
+    return QVariant();
+}
+static QVariant fcnGeomFromGML2( const QVariantList& values, QgsFeature*, QgsExpression* parent )
+{
+  QDomDocument doc;
+  QString errorMsg;
+  QString gml = getStringValue( values.at( 0 ), parent );  
+  if ( !doc.setContent( gml, true, &errorMsg ) )
+    return QVariant();
+
+  QgsGeometry* geom = QgsGeometry::fromGML2( doc.documentElement() );
+  if ( geom )
+    return QVariant::fromValue( geom );
+  else
+    return QVariant();
+}
 
 static QVariant fcnGeomArea( const QVariantList& , QgsFeature* f, QgsExpression* parent )
 {
@@ -932,6 +963,9 @@ const QList<QgsExpression::Function*> &QgsExpression::Functions()
     << new StaticFunction( "$perimeter", 0, fcnGeomPerimeter, QObject::tr( "Geometry" ), "", true )
     << new StaticFunction( "$x", 0, fcnX, QObject::tr( "Geometry" ), "", true )
     << new StaticFunction( "$y", 0, fcnY, QObject::tr( "Geometry" ), "" , true )
+    << new StaticFunction( "$geometry", 0, fcnGeometry, QObject::tr( "Geometry" ), "" , true )
+    << new StaticFunction( "GeomFromWKT", 1, fcnGeomFromWKT, QObject::tr( "Geometry" ) )
+    << new StaticFunction( "GeomFromGML2", 1, fcnGeomFromGML2, QObject::tr( "Geometry" ) )
     << new StaticFunction( "$rownum", 0, fcnRowNumber, QObject::tr( "Record" ) )
     << new StaticFunction( "$id", 0, fcnFeatureId, QObject::tr( "Record" ) )
     << new StaticFunction( "$scale", 0, fcnScale, QObject::tr( "Record" ) )

src/core/qgsexpression.h

@@ -434,7 +434,7 @@ class CORE_EXPORT QgsExpression
     {
       public:
         NodeSpatialOperator( SpatialOperator op, QgsGeometry* opGeom ) : mOp( op ), mOpGeometry( 0 ) { if ( opGeom ) mOpGeometry = opGeom; }
-        ~NodeSpatialOperator() { delete mOpGeometry; }
+        ~NodeSpatialOperator() { }
 
         virtual bool prepare( QgsExpression* parent, const QgsFieldMap& fields );
         virtual QVariant eval( QgsExpression* parent, QgsFeature* f );
@@ -630,6 +630,7 @@ class CORE_EXPORT QgsExpression
     QgsDistanceArea* mCalc;
 };
 
-Q_DECLARE_METATYPE( QgsExpression::Interval )
+Q_DECLARE_METATYPE( QgsExpression::Interval );
+Q_DECLARE_METATYPE( QgsGeometry * );
 
 #endif // QGSEXPRESSION_H