QgsVectorLayerFeatureSource::QgsVectorLayerFeatureSource( const QgsVectorLayer *layer )
{
QMutexLocker locker( &layer->mFeatureSourceConstructorMutex );
mProviderFeatureSource = layer->dataProvider()->featureSource();
mFields = layer->fields();
mId = layer->id();
// update layer's join caches if necessary
if ( layer->mJoinBuffer->containsJoins() )
layer->mJoinBuffer->createJoinCaches();
mJoinBuffer = layer->mJoinBuffer->clone();
mExpressionFieldBuffer = new QgsExpressionFieldBuffer( *layer->mExpressionFieldBuffer );
mCrs = layer->crs();
mHasEditBuffer = layer->editBuffer();
if ( mHasEditBuffer )
{
#if 0
// TODO[MD]: after merge
if ( request.filterType() == QgsFeatureRequest::FilterFid )
{
// only copy relevant parts
if ( L->editBuffer()->addedFeatures().contains( request.filterFid() ) )
mAddedFeatures.insert( request.filterFid(), L->editBuffer()->addedFeatures()[ request.filterFid()] );
if ( L->editBuffer()->changedGeometries().contains( request.filterFid() ) )
mChangedGeometries.insert( request.filterFid(), L->editBuffer()->changedGeometries()[ request.filterFid()] );
if ( L->editBuffer()->deletedFeatureIds().contains( request.filterFid() ) )
mDeletedFeatureIds.insert( request.filterFid() );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedAttributeValues.insert( request.filterFid(), L->editBuffer()->changedAttributeValues()[ request.filterFid()] );
if ( L->editBuffer()->changedAttributeValues().contains( request.filterFid() ) )
mChangedFeaturesRequest.setFilterFids( QgsFeatureIds() << request.filterFid() );
}
else
{
#endif
mAddedFeatures = QgsFeatureMap( layer->editBuffer()->addedFeatures() );
mChangedGeometries = QgsGeometryMap( layer->editBuffer()->changedGeometries() );
mDeletedFeatureIds = QgsFeatureIds( layer->editBuffer()->deletedFeatureIds() );
mChangedAttributeValues = QgsChangedAttributesMap( layer->editBuffer()->changedAttributeValues() );
mAddedAttributes = QList<QgsField>( layer->editBuffer()->addedAttributes() );
mDeletedAttributeIds = QgsAttributeList( layer->editBuffer()->deletedAttributeIds() );
#if 0
}
#endif
}
std::unique_ptr< QgsExpressionContextScope > layerScope( QgsExpressionContextUtils::layerScope( layer ) );
mLayerScope = *layerScope;
}
QList<QgsExpressionContextScope*> QgsExpressionContextUtils::globalProjectLayerScopes( const QgsMapLayer* layer )
{
QList<QgsExpressionContextScope*> scopes;
scopes << globalScope();
QgsProject* project = QgsProject::instance(); // TODO: use project associated with layer
if ( project )
scopes << projectScope( project );
if ( layer )
scopes << layerScope( layer );
return scopes;
}
