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[Server] WMS GetCapabilities: Cleaning and simplifying the GetCapabil…
…ities building The objectives of these changes are: * Improvement of the quality of the code for a better maintenance of it * Simplification of layer group extent calculation To do so, we introduced WMS Layer infos to collect layer informations for WMS GetCapabilities and calculate layer extent in the different available CRSes for WMS. With WMS Layer infos, we can combine extent to calculate layer group extent and removed the WMS GetCapabilities method `combineExtentAndCrsOfGroupChildren`. We probably can alo removed searching of preceding element in the methods to insert CRS and BoundingBox. Funded by Ifremer https://wwz.ifremer.fr/
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| /*************************************************************************** | ||
| qgswmslayerinfos.cpp | ||
| Layer's information | ||
| ------------------------------------ | ||
| begin : September 26 , 2022 | ||
| copyright : (C) 2022 by René-Luc D'Hont and David Marteau | ||
| email : rldhont at 3liz doc com | ||
| dmarteau at 3liz dot com | ||
| ***************************************************************************/ | ||
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| /*************************************************************************** | ||
| * * | ||
| * This program is free software; you can redistribute it and/or modify * | ||
| * it under the terms of the GNU General Public License as published by * | ||
| * the Free Software Foundation; either version 2 of the License, or * | ||
| * (at your option) any later version. * | ||
| * * | ||
| ***************************************************************************/ | ||
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| #include "qgsserverprojectutils.h" | ||
| #include "qgscoordinatetransform.h" | ||
| #include "qgsproject.h" | ||
| #include "qgsvectorlayer.h" | ||
| #include "qgswmslayerinfos.h" | ||
| #include "qgsmessagelog.h" | ||
| #include "qgsserverinterface.h" | ||
| #include "qgsmaplayerstylemanager.h" | ||
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| #include <algorithm> | ||
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| QgsRectangle QgsWmsLayerInfos::transformExtent( | ||
| const QgsRectangle &extent, | ||
| const QgsCoordinateReferenceSystem &source, | ||
| const QgsCoordinateReferenceSystem &destination, | ||
| const QgsCoordinateTransformContext &context, | ||
| const bool &ballparkTransformsAreAppropriate ) | ||
| { | ||
| QgsCoordinateTransform transformer { source, destination, context }; | ||
| transformer.setBallparkTransformsAreAppropriate( ballparkTransformsAreAppropriate ); | ||
| // Transform extent and do not catch exception | ||
| return transformer.transformBoundingBox( extent ); | ||
| } | ||
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| QMap< QString, QgsRectangle > QgsWmsLayerInfos::transformExtentToCrsList( | ||
| const QgsRectangle &extent, | ||
| const QgsCoordinateReferenceSystem &source, | ||
| const QList<QgsCoordinateReferenceSystem> &destinations, | ||
| const QgsCoordinateTransformContext &context ) | ||
| { | ||
| QMap< QString, QgsRectangle > crsExtents; | ||
| if ( extent.isEmpty() ) | ||
| { | ||
| return crsExtents; | ||
| } | ||
| for ( const QgsCoordinateReferenceSystem &destination : std::as_const( destinations ) ) | ||
| { | ||
| // Transform extent and do not catch exception | ||
| QgsCoordinateTransform crsTransform { source, destination, context }; | ||
| crsExtents[ destination.authid() ] = crsTransform.transformBoundingBox( extent ); | ||
| } | ||
| return crsExtents; | ||
| } | ||
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| bool setBoundingRect( | ||
| const QgsProject *project, | ||
| QgsWmsLayerInfos &pLayer, | ||
| QgsMapLayer *ml, | ||
| const QgsRectangle &wmsExtent, | ||
| const QgsCoordinateReferenceSystem &wgs84, | ||
| const QList<QgsCoordinateReferenceSystem> &outputCrsList ) | ||
| { | ||
| QgsRectangle layerExtent = ml->extent(); | ||
| if ( layerExtent.isEmpty() ) | ||
| { | ||
| // if the extent is empty (not only Null), use the wms extent | ||
| // defined in the project... | ||
| if ( wmsExtent.isNull() ) | ||
| { | ||
| // or the CRS extent otherwise | ||
| layerExtent = ml->crs().bounds(); | ||
| } | ||
| else | ||
| { | ||
| layerExtent = QgsRectangle( wmsExtent ); | ||
| if ( ml->crs() != project->crs() ) | ||
| { | ||
| // If CRS is different transform it to layer's CRS | ||
| try | ||
| { | ||
| layerExtent = QgsWmsLayerInfos::transformExtent( wmsExtent, project->crs(), ml->crs(), project->transformContext() ); | ||
| } | ||
| catch ( QgsCsException &cse ) | ||
| { | ||
| QgsMessageLog::logMessage( QStringLiteral( "Error transforming extent for layer %1: %2" ).arg( ml->name() ).arg( cse.what() ), QStringLiteral( "Server" ), Qgis::MessageLevel::Warning ); | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
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| // Now we have a layer Extent we need the WGS84 bounding rectangle | ||
| try | ||
| { | ||
| pLayer.wgs84BoundingRect = QgsWmsLayerInfos::transformExtent( layerExtent, ml->crs(), wgs84, project->transformContext(), true ); | ||
| } | ||
| catch ( const QgsCsException &cse ) | ||
| { | ||
| QgsMessageLog::logMessage( QStringLiteral( "Error transforming extent for layer %1: %2" ).arg( ml->name() ).arg( cse.what() ), QStringLiteral( "Server" ), Qgis::MessageLevel::Warning ); | ||
| return false; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| pLayer.wgs84BoundingRect = ml->wgs84Extent(); | ||
| } | ||
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| try | ||
| { | ||
| pLayer.crsExtents = QgsWmsLayerInfos::transformExtentToCrsList( | ||
| layerExtent, ml->crs(), outputCrsList, project->transformContext() | ||
| ); | ||
| } | ||
| catch ( QgsCsException &cse ) | ||
| { | ||
| QgsMessageLog::logMessage( QStringLiteral( "Error transforming extent for layer %1: %2" ).arg( ml->name() ).arg( cse.what() ), QStringLiteral( "Server" ), Qgis::MessageLevel::Warning ); | ||
| return false; | ||
| } | ||
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| return true; | ||
| } | ||
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| // =================================== | ||
| // Get wms layer infos | ||
| // =================================== | ||
| QMap< QString, QgsWmsLayerInfos > QgsWmsLayerInfos::buildWmsLayerInfos( | ||
| QgsServerInterface *serverIface, | ||
| const QgsProject *project, | ||
| const QList<QgsCoordinateReferenceSystem> &outputCrsList ) | ||
| { | ||
| QMap< QString, QgsWmsLayerInfos > wmsLayers; | ||
| #ifdef HAVE_SERVER_PYTHON_PLUGINS | ||
| QgsAccessControl *accessControl = serverIface->accessControls(); | ||
| #else | ||
| ( void )serverIface; | ||
| #endif | ||
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| bool useLayerIds = QgsServerProjectUtils::wmsUseLayerIds( *project ); | ||
| const QStringList restrictedLayers = QgsServerProjectUtils::wmsRestrictedLayers( *project ); | ||
| const QgsRectangle wmsExtent = QgsServerProjectUtils::wmsExtent( *project ); | ||
| const QgsCoordinateReferenceSystem wgs84 = QgsCoordinateReferenceSystem::fromOgcWmsCrs( geoEpsgCrsAuthId() ); | ||
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| for ( QgsMapLayer *ml : project->mapLayers() ) | ||
| { | ||
| if ( !ml || restrictedLayers.contains( ml->name() ) ) //unpublished layer | ||
| { | ||
| continue; | ||
| } | ||
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| #ifdef HAVE_SERVER_PYTHON_PLUGINS | ||
| if ( accessControl && !accessControl->layerReadPermission( ml ) ) | ||
| { | ||
| continue; | ||
| } | ||
| #endif | ||
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| QgsWmsLayerInfos pLayer; | ||
| pLayer.id = ml->id(); | ||
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| // Calculate layer extents for the WMS output CRSes list | ||
| // First define if the layer has an extent | ||
| // Vector layer with No Geometry has no extent the other has one | ||
| bool hasExtent = true; | ||
| if ( ml->type() == QgsMapLayerType::VectorLayer ) | ||
| { | ||
| QgsVectorLayer *vLayer = qobject_cast<QgsVectorLayer *>( ml ); | ||
| if ( !vLayer || vLayer->wkbType() == QgsWkbTypes::NoGeometry ) | ||
| { | ||
| hasExtent = false; | ||
| } | ||
| } | ||
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| // If the layer has an extent and we cannot get CRS bounding boxes, do not keep the layer | ||
| if ( hasExtent && !setBoundingRect( project, pLayer, ml, wmsExtent, wgs84, outputCrsList ) ) | ||
| continue; | ||
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| // layer type | ||
| pLayer.type = ml->type(); | ||
| // layer wms name | ||
| pLayer.name = ml->name(); | ||
| if ( useLayerIds ) | ||
| { | ||
| pLayer.name = ml->id(); | ||
| } | ||
| else if ( !ml->shortName().isEmpty() ) | ||
| { | ||
| pLayer.name = ml->shortName(); | ||
| } | ||
| // layer title | ||
| pLayer.title = ml->title(); | ||
| if ( pLayer.title.isEmpty() ) | ||
| { | ||
| pLayer.title = ml->name(); | ||
| } | ||
| // layer abstract | ||
| pLayer.abstract = ml->abstract(); | ||
| // layer is queryable | ||
| pLayer.queryable = ml->flags().testFlag( QgsMapLayer::Identifiable ); | ||
| // layer keywords | ||
| if ( !ml->keywordList().isEmpty() ) | ||
| { | ||
| pLayer.keywords = ml->keywordList().split( ',' ); | ||
| } | ||
| // layer styles | ||
| pLayer.styles = ml->styleManager()->styles(); | ||
| // layer legend URL | ||
| pLayer.legendUrl = ml->legendUrl(); | ||
| // layer legend URL format | ||
| pLayer.legendUrlFormat = ml->legendUrlFormat(); | ||
| // layer min/max scales | ||
| if ( ml->hasScaleBasedVisibility() ) | ||
| { | ||
| pLayer.hasScaleBasedVisibility = ml->hasScaleBasedVisibility(); | ||
| pLayer.maxScale = ml->maximumScale(); | ||
| pLayer.minScale = ml->minimumScale(); | ||
| } | ||
| // layer data URL | ||
| pLayer.dataUrl = ml->dataUrl(); | ||
| // layer attribution | ||
| pLayer.attribution = ml->attribution(); | ||
| pLayer.attributionUrl = ml->attributionUrl(); | ||
| // layer metadata URLs | ||
| pLayer.metadataUrls = ml->serverProperties()->metadataUrls(); | ||
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| wmsLayers[pLayer.id] = pLayer; | ||
| } | ||
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| return wmsLayers; | ||
| } | ||
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