QgsMapLayer* QgsMapLayer::fromLayerDefinition( QDomDocument& document ) { QDomNode layernode = document.elementsByTagName( "maplayer" ).at( 0 ); QDomElement layerElem = layernode.toElement(); QString type = layerElem.attribute( "type" ); QgsDebugMsg( type ); QgsMapLayer *layer = NULL; if ( type == "vector" ) { layer = new QgsVectorLayer; } else if ( type == "raster" ) { layer = new QgsRasterLayer; } else if ( type == "plugin" ) { QString typeName = layerElem.attribute( "name" ); layer = QgsPluginLayerRegistry::instance()->createLayer( typeName ); } bool ok = layer->readLayerXML( layerElem ); if ( ok ) return layer; delete layer; return 0; }
bool QgsProject::addLayer( const QDomElement& layerElem, QList<QDomNode>& brokenNodes, QList< QPair< QgsVectorLayer*, QDomElement > >& vectorLayerList ) { QString type = layerElem.attribute( "type" ); QgsDebugMsg( "Layer type is " + type ); QgsMapLayer *mapLayer = NULL; if ( type == "vector" ) { mapLayer = new QgsVectorLayer; } else if ( type == "raster" ) { mapLayer = new QgsRasterLayer; } else if ( type == "plugin" ) { QString typeName = layerElem.attribute( "name" ); mapLayer = QgsPluginLayerRegistry::instance()->createLayer( typeName ); } if ( !mapLayer ) { QgsDebugMsg( "Unable to create layer" ); return false; } Q_CHECK_PTR( mapLayer ); // have the layer restore state that is stored in Dom node if ( mapLayer->readLayerXML( layerElem ) && mapLayer->isValid() ) { emit readMapLayer( mapLayer, layerElem ); QList<QgsMapLayer *> myLayers; myLayers << mapLayer; QgsMapLayerRegistry::instance()->addMapLayers( myLayers ); QgsVectorLayer* vLayer = qobject_cast<QgsVectorLayer*>( mapLayer ); if ( vLayer && vLayer->vectorJoins().size() > 0 ) { vectorLayerList.push_back( qMakePair( vLayer, layerElem ) ); } return true; } else { delete mapLayer; QgsDebugMsg( "Unable to load " + type + " layer" ); brokenNodes.push_back( layerElem ); return false; } }
QgsMapLayer* QgsServerProjectParser::createLayerFromElement( const QDomElement& elem, bool useCache ) const { if ( elem.isNull() || !mXMLDoc ) { return 0; } addJoinLayersForElement( elem, useCache ); addValueRelationLayersForElement( elem, useCache ); QDomElement dataSourceElem = elem.firstChildElement( "datasource" ); QString uri = dataSourceElem.text(); QString absoluteUri; if ( !dataSourceElem.isNull() ) { //convert relative pathes to absolute ones if necessary if ( uri.startsWith( "dbname" ) ) //database { QgsDataSourceURI dsUri( uri ); if ( dsUri.host().isEmpty() ) //only convert path for file based databases { QString dbnameUri = dsUri.database(); QString dbNameUriAbsolute = convertToAbsolutePath( dbnameUri ); if ( dbnameUri != dbNameUriAbsolute ) { dsUri.setDatabase( dbNameUriAbsolute ); absoluteUri = dsUri.uri(); QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } } } else if ( uri.startsWith( "file:" ) ) //a file based datasource in url notation (e.g. delimited text layer) { QString filePath = uri.mid( 5, uri.indexOf( "?" ) - 5 ); QString absoluteFilePath = convertToAbsolutePath( filePath ); if ( filePath != absoluteFilePath ) { QUrl destUrl = QUrl::fromEncoded( uri.toAscii() ); destUrl.setScheme( "file" ); destUrl.setPath( absoluteFilePath ); absoluteUri = destUrl.toEncoded(); QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } else { absoluteUri = uri; } } else //file based data source { absoluteUri = convertToAbsolutePath( uri ); if ( uri != absoluteUri ) { QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } } } QString id = layerId( elem ); QgsMapLayer* layer = 0; if ( useCache ) { layer = QgsMSLayerCache::instance()->searchLayer( absoluteUri, id ); } if ( layer ) { return layer; } QString type = elem.attribute( "type" ); if ( type == "vector" ) { layer = new QgsVectorLayer(); } else if ( type == "raster" ) { layer = new QgsRasterLayer(); } else if ( elem.attribute( "embedded" ) == "1" ) //layer is embedded from another project file { //todo: fixme /* QString project = convertToAbsolutePath( elem.attribute( "project" ) ); QgsDebugMsg( QString( "Project path: %1" ).arg( project ) ); QgsProjectParser* otherConfig = dynamic_cast<QgsProjectParser*>( QgsConfigCache::instance()->searchConfiguration( project ) ); if ( !otherConfig ) { return 0; } QHash< QString, QDomElement >::const_iterator layerIt = otherConfig->mProjectLayerElementsById.find( elem.attribute( "id" ) ); if ( layerIt == otherConfig->mProjectLayerElementsById.constEnd() ) { return 0; } return otherConfig->createLayerFromElement( layerIt.value() ); */ } if ( layer ) { layer->readLayerXML( const_cast<QDomElement&>( elem ) ); //should be changed to const in QgsMapLayer layer->setLayerName( layerName( elem ) ); if ( useCache ) { QgsMSLayerCache::instance()->insertLayer( absoluteUri, id, layer, mProjectPath ); } else { //todo: fixme //mLayersToRemove.push_back( layer ); } } return layer; }
QgsMapLayer* QgsServerProjectParser::createLayerFromElement( const QDomElement& elem, bool useCache ) const { if ( elem.isNull() || !mXMLDoc ) { return nullptr; } addJoinLayersForElement( elem ); addGetFeatureLayers( elem ); QDomElement dataSourceElem = elem.firstChildElement( "datasource" ); QString uri = dataSourceElem.text(); QString absoluteUri; // If QgsProject instance fileName is set, // Is converting relative pathes to absolute still relevant ? if ( !dataSourceElem.isNull() ) { //convert relative pathes to absolute ones if necessary if ( uri.startsWith( "dbname" ) ) //database { QgsDataSourceURI dsUri( uri ); if ( dsUri.host().isEmpty() ) //only convert path for file based databases { QString dbnameUri = dsUri.database(); QString dbNameUriAbsolute = convertToAbsolutePath( dbnameUri ); if ( dbnameUri != dbNameUriAbsolute ) { dsUri.setDatabase( dbNameUriAbsolute ); absoluteUri = dsUri.uri(); QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } } } else if ( uri.startsWith( "file:" ) ) //a file based datasource in url notation (e.g. delimited text layer) { QString filePath = uri.mid( 5, uri.indexOf( "?" ) - 5 ); QString absoluteFilePath = convertToAbsolutePath( filePath ); if ( filePath != absoluteFilePath ) { QUrl destUrl = QUrl::fromEncoded( uri.toAscii() ); destUrl.setScheme( "file" ); destUrl.setPath( absoluteFilePath ); absoluteUri = destUrl.toEncoded(); QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } else { absoluteUri = uri; } } else //file based data source { absoluteUri = convertToAbsolutePath( uri ); if ( uri != absoluteUri ) { QDomText absoluteTextNode = mXMLDoc->createTextNode( absoluteUri ); dataSourceElem.replaceChild( absoluteTextNode, dataSourceElem.firstChild() ); } } } QString id = layerId( elem ); QgsMapLayer* layer = nullptr; if ( useCache ) { layer = QgsMSLayerCache::instance()->searchLayer( absoluteUri, id, mProjectPath ); } if ( layer ) { if ( layer->type() == QgsMapLayer::VectorLayer ) addValueRelationLayersForLayer( dynamic_cast<QgsVectorLayer *>( layer ) ); return layer; } QString type = elem.attribute( "type" ); if ( type == "vector" ) { layer = new QgsVectorLayer(); } else if ( type == "raster" ) { layer = new QgsRasterLayer(); } else if ( elem.attribute( "embedded" ) == "1" ) //layer is embedded from another project file { QString project = convertToAbsolutePath( elem.attribute( "project" ) ); QgsDebugMsg( QString( "Project path: %1" ).arg( project ) ); QgsServerProjectParser* otherConfig = QgsConfigCache::instance()->serverConfiguration( project ); if ( !otherConfig ) { return nullptr; } return otherConfig->mapLayerFromLayerId( elem.attribute( "id" ), useCache ); } if ( layer ) { if ( layer->type() == QgsMapLayer::VectorLayer ) { // see QgsEditorWidgetRegistry::mapLayerAdded() QObject::connect( layer, SIGNAL( readCustomSymbology( const QDomElement&, QString& ) ), QgsEditorWidgetRegistry::instance(), SLOT( readSymbology( const QDomElement&, QString& ) ) ); } layer->readLayerXML( const_cast<QDomElement&>( elem ) ); //should be changed to const in QgsMapLayer //layer->setLayerName( layerName( elem ) ); if ( layer->type() == QgsMapLayer::VectorLayer ) { addValueRelationLayersForLayer( dynamic_cast<QgsVectorLayer *>( layer ) ); } if ( useCache ) { QgsMSLayerCache::instance()->insertLayer( absoluteUri, id, layer, mProjectPath ); } else { //todo: fixme //mLayersToRemove.push_back( layer ); } } return layer; }