[2869] Add diagramContext variable to DiagramCreationService#doRender

Bug: #2869
Signed-off-by: Axel RICHARD <axel.richard@obeo.fr>

CHANGELOG.adoc

@@ -114,7 +114,7 @@ It is the responsibility of the drop targets (e.g. a diagram) to validate the dr
 - https://github.com/eclipse-sirius/sirius-web/issues/2772[#2772] Improve performance of the Palette
 - https://github.com/eclipse-sirius/sirius-web/issues/2679[#2679] [diagram] When editing a label, place input element closer to the label's location (centered).
 - https://github.com/eclipse-sirius/sirius-web/issues/2804[#2804] [sirius-web] Add the ability to declare custom nodes while using the `sirius-web-application` frontend package.
-- https://github.com/eclipse-sirius/sirius-web/issues/2718[#2718] Replacing useNodes and useEdges by useReactFlow to imporove performances.
+- https://github.com/eclipse-sirius/sirius-web/issues/2718[#2718] Replacing useNodes and useEdges by useReactFlow to improve performances.
 - https://github.com/eclipse-sirius/sirius-web/issues/2787[#2787] [view] Add the ability to customize the icons of the node tools and edge tools in the View DSL.
 - https://github.com/eclipse-sirius/sirius-web/issues/2784[#2784] [performance] Expand monitoring capabilities.
 - https://github.com/eclipse-sirius/sirius-web/issues/2760[#2760] Begin and end label placement of and edge takes into account handle position.
@@ -127,6 +127,7 @@ image:doc/screenshots/biggerResizeHandles.png[Compartment with header without se
 - https://github.com/eclipse-sirius/sirius-web/issues/2609[#2609] [diagram] Move handles after node move to reduce edges crossing.
 - https://github.com/eclipse-sirius/sirius-web/issues/2484[#2484] [diagram] Split the label concept into three concepts: edge label, inside label and outside label.
 This is a preliminary work to add some proper support for outside labels in the near future.
+- https://github.com/eclipse-sirius/sirius-web/issues/2869[#2869] [diagram] Add `diagramContext` variable to accessible variables when computing semantic candidates expression.
 
 == v2023.12.0
 

packages/diagrams/backend/sirius-components-collaborative-diagrams/src/main/java/org/eclipse/sirius/components/collaborative/diagrams/DiagramCreationService.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019, 2023 Obeo and others.
+ * Copyright (c) 2019, 2024 Obeo and others.
  * 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
@@ -138,6 +138,7 @@ private Diagram doRender(String label, Object targetObject, IEditingContext edit
         variableManager.put(VariableManager.SELF, targetObject);
         variableManager.put(IEditingContext.EDITING_CONTEXT, editingContext);
         variableManager.put(Environment.ENVIRONMENT, new Environment(Environment.SIRIUS_COMPONENTS));
+        variableManager.put(IDiagramContext.DIAGRAM_CONTEXT, optionalDiagramContext.orElse(null));
 
         Optional<IDiagramEvent> optionalDiagramElementEvent = optionalDiagramContext.map(IDiagramContext::getDiagramEvent);
         Optional<Diagram> optionalPreviousDiagram = optionalDiagramContext.map(IDiagramContext::getDiagram);