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;
}
