Handle layer deleted

Author: m-kuhn

src/app/qgsgeometryvalidationservice.cpp

@@ -81,6 +81,12 @@ void QgsGeometryValidationService::onLayersAdded( const QList<QgsMapLayer *> &la
         enableLayerChecks( vectorLayer );
       }, Qt::UniqueConnection );
 
+      connect( vectorLayer, &QgsVectorLayer::destroyed, this, [vectorLayer, this]()
+      {
+        cleanupLayerChecks( vectorLayer );
+        mLayerChecks.remove( vectorLayer );
+      });
+
       enableLayerChecks( vectorLayer );
     }
   }
@@ -100,8 +106,8 @@ void QgsGeometryValidationService::onGeometryChanged( QgsVectorLayer *layer, Qgs
   Q_UNUSED( geometry )
   // It would be nice to use the geometry here for the tests.
   // But:
-  // 1. other codepaths to the checks also have no geometry (feature added / feature deleted)
-  // 2. and looking it up from the edit buffer (in memory) is really fast.
+  //  1. other codepaths to the checks also have no geometry (feature added / feature deleted)
+  //  2. and looking it up from the edit buffer (in memory) is really fast.
   // so in short: it's still a good idea, but not as important as on first thought.
 
   if ( !mLayerChecks[layer].topologyChecks.empty() )
@@ -135,9 +141,9 @@ void QgsGeometryValidationService::onBeforeCommitChanges( QgsVectorLayer *layer
   }
 }
 
-void QgsGeometryValidationService::enableLayerChecks( QgsVectorLayer *layer )
+void QgsGeometryValidationService::cleanupLayerChecks(QgsVectorLayer* layer)
 {
-  if ( layer->geometryOptions()->geometryChecks().empty() && !mLayerChecks.contains( layer ) )
+  if ( !mLayerChecks.contains( layer ) )
     return;
 
   VectorLayerCheckInformation &checkInformation = mLayerChecks[layer];
@@ -146,7 +152,17 @@ void QgsGeometryValidationService::enableLayerChecks( QgsVectorLayer *layer )
 
   qDeleteAll( checkInformation.singleFeatureChecks );
   qDeleteAll( checkInformation.topologyChecks );
-  delete checkInformation.context;
+  checkInformation.context.reset();
+}
+
+void QgsGeometryValidationService::enableLayerChecks( QgsVectorLayer *layer )
+{
+  if ( layer->geometryOptions()->geometryChecks().empty() && !mLayerChecks.contains( layer ) )
+    return;
+
+  VectorLayerCheckInformation &checkInformation = mLayerChecks[layer];
+
+  cleanupLayerChecks( layer );
 
   if ( layer->geometryOptions()->geometryChecks().empty() )
   {
@@ -174,7 +190,7 @@ void QgsGeometryValidationService::enableLayerChecks( QgsVectorLayer *layer )
     if ( activeChecks.contains( checkId ) )
     {
       const QVariantMap checkConfiguration = layer->geometryOptions()->checkConfiguration( checkId );
-      layerChecks.append( factory->createGeometryCheck( checkInformation.context, checkConfiguration ) );
+      layerChecks.append( factory->createGeometryCheck( checkInformation.context.get(), checkConfiguration ) );
     }
   }
 
@@ -197,7 +213,7 @@ void QgsGeometryValidationService::enableLayerChecks( QgsVectorLayer *layer )
     if ( activeChecks.contains( checkId ) )
     {
       const QVariantMap checkConfiguration = layer->geometryOptions()->checkConfiguration( checkId );
-      topologyChecks.append( factory->createGeometryCheck( checkInformation.context, checkConfiguration ) );
+      topologyChecks.append( factory->createGeometryCheck( checkInformation.context.get(), checkConfiguration ) );
     }
   }
 

src/app/qgsgeometryvalidationservice.h

@@ -22,6 +22,7 @@ email                : matthias@opengis.ch
 #include <QReadWriteLock>
 
 #include "qgsfeature.h"
+#include "qgsgeometrycheckcontext.h"
 
 class QgsProject;
 class QgsMapLayer;
@@ -32,7 +33,6 @@ class QgsSingleGeometryCheckError;
 class QgsGeometryCheckError;
 class QgsFeedback;
 class QgsFeaturePool;
-struct QgsGeometryCheckContext;
 
 /**
  * This service connects to all layers in a project and triggers validation
@@ -69,6 +69,7 @@ class QgsGeometryValidationService : public QObject
     void geometryCheckCompleted( QgsVectorLayer *layer, QgsFeatureId fid, const QList<std::shared_ptr<QgsSingleGeometryCheckError>> &errors );
     void topologyChecksUpdated( QgsVectorLayer *layer, const QList<std::shared_ptr<QgsGeometryCheckError> > &errors );
     void topologyChecksCleared( QgsVectorLayer *layer );
+    void topologyErrorUpdated( QgsVectorLayer *layer, QgsGeometryCheckError *error );
 
     void warning( const QString &message );
 
@@ -80,6 +81,7 @@ class QgsGeometryValidationService : public QObject
     void onBeforeCommitChanges( QgsVectorLayer *layer );
 
   private:
+    void cleanupLayerChecks( QgsVectorLayer *layer );
     void enableLayerChecks( QgsVectorLayer *layer );
 
     void cancelTopologyCheck( QgsVectorLayer *layer );
@@ -98,7 +100,7 @@ class QgsGeometryValidationService : public QObject
       QList<QgsFeedback *> topologyCheckFeedbacks; // will be deleted when topologyCheckFutureWatcher is delteed
       QList<std::shared_ptr<QgsGeometryCheckError>> topologyCheckErrors;
       QList<QMetaObject::Connection> connections;
-      QgsGeometryCheckContext *context = nullptr;
+      std::shared_ptr<QgsGeometryCheckContext> context;
     };
 
     QReadWriteLock mTopologyCheckLock;