[396] Adapt NodeCreationEditPolicy to compute the target location

- Constructors of CreationUtil have been improved to directly have
LayoutData as parameter instead of location and size. Indeed, the
location is relative to the parent edit part and for border nodes, the
parent edit part is not systematically the "host" of the called policy.
- In NodeCreationEditPolicy, in case of border nodes, the "host edit
part" is not systematically considered (to compute the RootLayoutData
for example). The correct edit part, a parent of the host, is computed
according to the mapping defined in the used tool.

Bug: #396

plugins/org.eclipse.sirius.diagram.sequence.ui/src/org/eclipse/sirius/diagram/sequence/ui/tool/internal/edit/policy/SequenceContainerCreationPolicy.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010, 2021 THALES GLOBAL SERVICES and others.
+ * Copyright (c) 2010, 2024 THALES GLOBAL SERVICES and others.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -101,7 +101,7 @@ protected Command getCreateNodeOnDiagramCommand(CreateRequest request, NodeCreat
                 finishingEndEndPredecessor = SequenceGraphicalHelper.getEndBefore(diag, location.y + size.height);
             }
 
-            CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(startingEndPredecessor, finishingEndEndPredecessor, location), getRealLocation(request), request.getSize(),
+            CreationUtil creationUtil = new CreationUtil(getDiagramCommandFactory(startingEndPredecessor, finishingEndEndPredecessor, location), getRealLocation(request), request.getSize(),
                     getHost());
             result = creationUtil.getNodeCreationCommand(diagram, tool);
         } else if (tool instanceof InstanceRoleCreationTool && diagram instanceof SequenceDDiagram) {
@@ -110,7 +110,7 @@ protected Command getCreateNodeOnDiagramCommand(CreateRequest request, NodeCreat
             GraphicalHelper.screen2logical(location, (IGraphicalEditPart) getHost());
 
             EObject predecessor = SequenceGraphicalHelper.getInstanceRoleBefore(diag, location.x);
-            CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(predecessor, location), getRealLocation(request), request.getSize(), getHost());
+            CreationUtil creationUtil = new CreationUtil(getDiagramCommandFactory(predecessor, location), getRealLocation(request), request.getSize(), getHost());
             result = creationUtil.getNodeCreationCommand(diagram, tool);
         } else {
             result = super.getCreateNodeOnDiagramCommand(request, tool, diagram);
@@ -140,7 +140,7 @@ protected Command getCreateContainerOnDiagramCommand(CreateRequest request, Cont
                 List<EObject> coverage = creationValidator.getCoverage();
                 Range expansionZone = creationValidator.getExpansionZone();
 
-                CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(startingEndPredecessor, finishingEndPredecessor, coverage, getCreationRange(request)),
+                CreationUtil creationUtil = new CreationUtil(getDiagramCommandFactory(startingEndPredecessor, finishingEndPredecessor, coverage, getCreationRange(request)),
                         getRealLocation(request), getRealSize(ccdTool, request), getHost());
                 result = creationUtil.getContainerCreationDescription(diagram, ccdTool);
 

plugins/org.eclipse.sirius.diagram.sequence.ui/src/org/eclipse/sirius/diagram/sequence/ui/tool/internal/edit/policy/SequenceNodeCreationPolicy.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010, 2013 THALES GLOBAL SERVICES.
+ * Copyright (c) 2010, 2024 THALES GLOBAL SERVICES.
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
@@ -148,7 +148,7 @@ public void eraseTargetFeedback(Request request) {
      * {@inheritDoc}
      */
     @Override
-    protected Command getCreateNodeOnNodeCommand(CreateRequest request, NodeCreationDescription tool, DNode viewnode) {
+    protected Command getCreateNodeOnNodeCommand(CreateRequest request, NodeCreationDescription tool, DNode viewnode, EditPart parentEditPartToUse) {
         if (tool instanceof ExecutionCreationTool || tool instanceof StateCreationTool || tool instanceof ObservationPointCreationTool) {
             SequenceDiagram sequenceDiagram = EditPartsHelper.getSequenceDiagram(getHost());
             SequenceDDiagram diagram = sequenceDiagram.getSequenceDDiagram();
@@ -163,11 +163,11 @@ protected Command getCreateNodeOnNodeCommand(CreateRequest request, NodeCreation
                 GraphicalHelper.logical2screen(bottomRight, (IGraphicalEditPart) getHost());
                 request.setSize(new Dimension(LayoutConstants.DEFAULT_EXECUTION_WIDTH, LayoutConstants.DEFAULT_EXECUTION_HEIGHT));
             }
-            CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(startingEndPredecessor, startingEndPredecessor, location), getRealLocation(request), request.getSize(),
-                    getHost());
+            CreationUtil creationUtil = new CreationUtil(getDiagramCommandFactory(startingEndPredecessor, startingEndPredecessor, location), getRealLocation(request, parentEditPartToUse),
+                    request.getSize(), getHost());
             return creationUtil.getNodeCreationCommand(viewnode, tool);
         } else {
-            return super.getCreateNodeOnNodeCommand(request, tool, viewnode);
+            return super.getCreateNodeOnNodeCommand(request, tool, viewnode, parentEditPartToUse);
         }
     }
 
@@ -190,7 +190,8 @@ protected Command getCreateContainerInContainerCommand(CreateRequest request, Co
                 Point location = request.getLocation().getCopy();
                 GraphicalHelper.screen2logical(location, (IGraphicalEditPart) getHost());
 
-                CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(startingEndPredecessor, startingEndPredecessor, location), getRealLocation(request), getHost());
+                CreationUtil creationUtil = new CreationUtil(request, getDiagramCommandFactory(startingEndPredecessor, startingEndPredecessor, location), getRealLocation(request, getHost()),
+                        getHost());
                 result = creationUtil.getContainerCreationDescription((DDiagramElementContainer) viewNodeContainer.eContainer(), tool);
             } else {
                 result = UnexecutableCommand.INSTANCE;

plugins/org.eclipse.sirius.diagram.ui/src-diag/org/eclipse/sirius/diagram/ui/graphical/edit/policies/CreationUtil.java

@@ -66,19 +66,13 @@
  */
 public class CreationUtil {
 
-    /** The location of the clicked point. */
-    private final Point realLocation;
-
-    /** The computed size of the element to create. */
-    private final Dimension realSize;
+    /** The location of the clicked point, the size and the parent edit part of the element to create. */
+    private final RootLayoutData rootLayoutData;
 
     /** The EMF Command Factory. */
     private final IDiagramCommandFactory emfCommandFactory;
 
-    /** The request. */
-    private final CreateRequest request;
-
-    /** The edit part. */
+    /** The edit part on which the calling policy is installed. */
     private final EditPart editPart;
 
     /**
@@ -91,33 +85,45 @@ public class CreationUtil {
      * @param realLocation
      *            the location of the clicked point.
      * @param editPart
-     *            the edit part
+     *            the edit part on which the calling policy is installed.
      * @since 0.9.0
      */
     public CreationUtil(final CreateRequest request, final IDiagramCommandFactory commandFactory, final Point realLocation, final EditPart editPart) {
-        this(request, commandFactory, realLocation, null, editPart);
+        // The size of the request take into account the zoom (got the size in 100%)
+        this(commandFactory, new RootLayoutData(editPart, realLocation.getCopy(), CreationUtil.adaptRequestSizeToZoomFactor(request, editPart)), editPart);
     }
 
     /**
      * Creates a new <code>CreationUtil</code> with the specified request and location.
      * 
-     * @param request
-     *            the request.
      * @param commandFactory
      *            the emf command factory.
      * @param realLocation
      *            the location of the clicked point.
      * @param realSize
      *            the computed size of the element to create, null if the default size must be used
      * @param editPart
-     *            the edit part
+     *            the edit part on which the calling policy is installed.
      * @since 0.9.0
      */
-    public CreationUtil(final CreateRequest request, final IDiagramCommandFactory commandFactory, final Point realLocation, final Dimension realSize, final EditPart editPart) {
-        this.realLocation = realLocation;
-        this.realSize = realSize;
-        this.request = request;
+    public CreationUtil(final IDiagramCommandFactory commandFactory, final Point realLocation, final Dimension realSize, final EditPart editPart) {
+        this(commandFactory, new RootLayoutData(editPart, realLocation.getCopy(), realSize == null ? null : realSize.getCopy()), editPart);
+    }
+
+    /**
+     * Creates a new <code>CreationUtil</code> with the specified request and location.
+     * 
+     * @param commandFactory
+     *            the emf command factory.
+     * @param rootLayoutData
+     *            the layout data for the created element (clicked point, size and parent edit part).
+     * @param editPart
+     *            the edit part on which the calling policy is installed.
+     * @since 0.9.0
+     */
+    public CreationUtil(final IDiagramCommandFactory commandFactory, final RootLayoutData rootLayoutData, final EditPart editPart) {
         this.emfCommandFactory = commandFactory;
+        this.rootLayoutData = rootLayoutData;
         this.editPart = editPart;
     }
 
@@ -314,15 +320,7 @@ private Command createLayoutDataCommand() {
         return new Command() {
             @Override
             public void execute() {
-                // The size of the request take into account the zoom (got
-                // the size in 100%)
-                Dimension size = null;
-                if (realSize != null) {
-                    size = realSize.getCopy();
-                } else {
-                    size = adaptRequestSizeToZoomFactor();
-                }
-                SiriusLayoutDataManager.INSTANCE.addData(new RootLayoutData(editPart, realLocation.getCopy(), size));
+                SiriusLayoutDataManager.INSTANCE.addData(rootLayoutData);
             }
         };
     }
@@ -332,7 +330,7 @@ public void execute() {
      * 
      * @return A new dimension
      */
-    private Dimension adaptRequestSizeToZoomFactor() {
+    public static Dimension adaptRequestSizeToZoomFactor(CreateRequest request, EditPart editPart) {
         if (request.getSize() == null) {
             return null;
         }