[538] Fix ownedAction/nestedAction edge in ActionFlow View

This commit ensures that the edge is visible if the owned/nested action
is represented outside of its container.

Bug: eclipse-syson#538
Signed-off-by: Gwendal Daniel <gwendal.daniel@obeosoft.com>

backend/views/syson-diagram-actionflow-view/src/main/java/org/eclipse/syson/diagram/actionflow/view/ActionFlowViewDiagramDescriptionProvider.java

@@ -31,12 +31,14 @@
 import org.eclipse.sirius.components.view.diagram.DiagramToolSection;
 import org.eclipse.sirius.components.view.diagram.NodeTool;
 import org.eclipse.syson.diagram.actionflow.view.edges.AllocateEdgeDescriptionProvider;
+import org.eclipse.syson.diagram.actionflow.view.edges.DefinitionOwnedActionUsageEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.DependencyEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.FeatureTypingEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.RedefinitionEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.SubclassificationEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.SubsettingEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.edges.SuccessionEdgeDescriptionProvider;
+import org.eclipse.syson.diagram.actionflow.view.edges.UsageNestedActionUsageEdgeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.nodes.ActionFlowViewEmptyDiagramNodeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.nodes.CompartmentNodeDescriptionProvider;
 import org.eclipse.syson.diagram.actionflow.view.nodes.DefinitionNodeDescriptionProvider;
@@ -148,6 +150,9 @@ public RepresentationDescription create(IColorProvider colorProvider) {
         diagramElementDescriptionProviders.add(new DecisionActionNodeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
         diagramElementDescriptionProviders.add(new ReferencingPerformActionUsageNodeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
 
+        diagramElementDescriptionProviders.add(new UsageNestedActionUsageEdgeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
+        diagramElementDescriptionProviders.add(new DefinitionOwnedActionUsageEdgeDescriptionProvider(colorProvider, this.getDescriptionNameGenerator()));
+
         DEFINITIONS.forEach(definition -> {
             diagramElementDescriptionProviders.add(new DefinitionNodeDescriptionProvider(definition, colorProvider));
         });

backend/views/syson-diagram-actionflow-view/src/main/java/org/eclipse/syson/diagram/actionflow/view/edges/DefinitionOwnedActionUsageEdgeDescriptionProvider.java

@@ -0,0 +1,41 @@
+/*******************************************************************************
+ * Copyright (c) 2024 Obeo.
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Obeo - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.syson.diagram.actionflow.view.edges;
+
+import java.util.List;
+
+import org.eclipse.emf.ecore.EClass;
+import org.eclipse.sirius.components.view.builder.providers.IColorProvider;
+import org.eclipse.syson.diagram.actionflow.view.ActionFlowViewDiagramDescriptionProvider;
+import org.eclipse.syson.diagram.common.view.edges.AbstractDefinitionOwnedUsageEdgeDescriptionProvider;
+import org.eclipse.syson.sysml.SysmlPackage;
+import org.eclipse.syson.util.IDescriptionNameGenerator;
+
+/**
+ * Used to create the edge description between definitions and their owned action usages in the Action Flow View
+ * diagram.
+ *
+ * @author gdaniel
+ */
+public class DefinitionOwnedActionUsageEdgeDescriptionProvider extends AbstractDefinitionOwnedUsageEdgeDescriptionProvider {
+
+    public DefinitionOwnedActionUsageEdgeDescriptionProvider(IColorProvider colorProvider, IDescriptionNameGenerator nameGenerator) {
+        super(SysmlPackage.eINSTANCE.getActionUsage(), SysmlPackage.eINSTANCE.getDefinition_OwnedAction(), colorProvider, nameGenerator);
+    }
+
+    @Override
+    protected List<EClass> getEdgeSources() {
+        return ActionFlowViewDiagramDescriptionProvider.DEFINITIONS;
+    }
+
+}

backend/views/syson-diagram-actionflow-view/src/main/java/org/eclipse/syson/diagram/actionflow/view/edges/UsageNestedActionUsageEdgeDescriptionProvider.java

@@ -34,6 +34,6 @@ public UsageNestedActionUsageEdgeDescriptionProvider(IColorProvider colorProvide
 
     @Override
     protected List<EClass> getEdgeSources() {
-        return ActionFlowViewDiagramDescriptionProvider.USAGES.stream().filter(eClass -> eClass != SysmlPackage.eINSTANCE.getActionUsage()).toList();
+        return ActionFlowViewDiagramDescriptionProvider.USAGES;
     }
 }