[1620] Handle short names in qualified names when direct editing

CHANGELOG.adoc

@@ -31,6 +31,8 @@
 
 === Improvements
 
+- https://github.com/eclipse-syson/syson/issues/1620[#1620] [services] Handle short names in qualified names when direct editing.
+
 === New features
 
 - https://github.com/eclipse-syson/syson/issues/1581[#1581] [diagrams] Display inherited `PortUsages` as graphical border nodes in diagrams.

backend/application/syson-application/src/test/java/org/eclipse/syson/application/data/GeneralViewDirectEditTestProjectData.java

@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * Copyright (c) 2025 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.application.data;
+
+/**
+ * Identifiers for "GeneralView-DirectEdit" project.
+ *
+ * @author frouene
+ */
+public class GeneralViewDirectEditTestProjectData {
+
+    public static final String SCRIPT_PATH = "/scripts/database-content/GeneralView-DirectEdit.sql";
+
+    public static final String EDITING_CONTEXT_ID = "e13cbf2f-3817-4708-bc39-e94eb9ac0d96";
+
+    /**
+     * Ids of graphical elements.
+     */
+    public static class GraphicalIds {
+
+        public static final String DIAGRAM_ID = "7464d7ea-ba4c-4171-b534-8b86ef6caf95";
+
+    }
+
+    /**
+     * Ids for the semantic elements.
+     */
+    public static class SemanticIds {
+
+        public static final String PART_USAGE_ID = "8b4669e5-ac6b-41de-88c4-8d7b63fe534e";
+        public static final String PART_DEF_1_USAGE_ELEMENT_ID = "303aa440-a031-4419-a7b5-04fb8887a495";
+        public static final String PART_DEF_2_USAGE_ELEMENT_ID = "6866b297-0fd5-4a99-8ae3-48dd61aae575";
+    }
+
+}

backend/metamodel/syson-sysml-metamodel/src/main/java/org/eclipse/syson/sysml/util/ElementUtil.java

@@ -355,25 +355,33 @@ private Collection<EObject> getAllRootsInResourceSet(EObject context) {
 
     /**
      * Check if the given element's name match the given String.
+     * If there is no match with the name, then the short name is checked.
      *
      * @param element
-     *            the {@link Element} to check.
+     *         the {@link Element} to check.
      * @param name
-     *            the name to match.
-     * @return <code>true</code> if the name match, <code>false</code> otherwise.
+     *         the name to match.
+     * @return <code>true</code> if a match is found, <code>false</code> otherwise.
      */
     private boolean nameMatches(Element element, String name) {
-        boolean matches = false;
-        if (element != null && name != null) {
-            String elementName = element.getName();
-            if (elementName != null) {
-                matches = elementName.strip().equals(name.strip());
-                if (!matches && name.startsWith("'") && name.endsWith("'")) {
-                    // We give the option to quote names, but the quotes aren't part of the model.
-                    elementName = "'" + elementName + "'";
-                    matches = elementName.strip().equals(name.strip());
-                }
-            }
+        if (element == null || name == null) {
+            return false;
+        }
+        if (this.equalsConsideringOptionalQuotes(element.getName(), name)) {
+            return true;
+        }
+        return this.equalsConsideringOptionalQuotes(element.getShortName(), name);
+    }
+
+    private boolean equalsConsideringOptionalQuotes(String candidate, String query) {
+        if (candidate == null || query == null) {
+            return false;
+        }
+        boolean matches = candidate.strip().equals(query.strip());
+        if (!matches && query.startsWith("'") && query.endsWith("'")) {
+            // We give the option to quote names, but the quotes aren't part of the model.
+            candidate = "'" + candidate + "'";
+            matches = candidate.strip().equals(query.strip());
         }
         return matches;
     }

backend/services/syson-services/src/main/java/org/eclipse/syson/services/UtilService.java

@@ -439,6 +439,19 @@ public <T extends Element> T findByName(EObject object, String elementName) {
      * @return the found element or <code>null</code>.
      */
     public <T extends Element> T findByNameAndType(EObject object, String elementName, Class<T> elementType) {
+        // Use the semantic scoping rule based on Namespace resolution to find the most "valid" target
+        if (object instanceof Element element) {
+            Membership resolvedElement;
+            if (element instanceof Namespace namespace) {
+                resolvedElement = namespace.resolve(elementName);
+            } else {
+                resolvedElement = element.getOwningNamespace().resolve(elementName);
+            }
+            if (resolvedElement != null && elementType.isInstance(resolvedElement.getMemberElement())) {
+                return (T) resolvedElement.getMemberElement();
+            }
+        }
+        // No semantic valid target, fallback on any matching item but it might violate some scoping validation rule
         return this.elementUtil.findByNameAndType(object, elementName, elementType);
     }
 

doc/content/modules/user-manual/pages/release-notes/2025.12.0.adoc

@@ -44,6 +44,25 @@ requirement <'SN'> {
 
 == Improvements
 
+- In diagrams, when using direct edit on graphical elements, it's now possible to use _short names_ in the qualified names.
+If two or more `Elements` share the same _short name_, {product} will search for the best candidate based on the scope of the element.
+Furthermore, if an ambiguity exists between the _short name_ and the _declared name_ of two different `Elements`, the declared name will be preferred.
+
+For example in:
+
+```
+package Drone {
+   package <LA> Drone_LogicalArchitecture {
+      part def CommonBattery;
+   }
+   package <PA> Drone_PhysicalArchitecture {
+      part def Battery :> LA::CommonBattery;
+   }
+}
+```
+
+In the example above, when using the direct edit capability to subclass the _Battery_ `Part Definition`, it is now possible to type _LA::CommonBattery_ instead of _Drone_LogicalArchitecture::CommonBattery_.
+
 == Technical details
 
 * For technical details on this {product} release (including breaking changes and dependency updates), please refer to https://github.com/eclipse-syson/syson/blob/main/CHANGELOG.adoc[changelog].