[454887] Dispose SessionEditorInput on tabel and tree closing

This avoid a memory leak caused by the INavigationHistory and
EditorHistory that retain the IEditorInput.

Bug: 454887
Change-Id: I040c8244a6356032aef9eea931c9e9d33a59c7ea
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>

1 files changed, 6 insertions, 0 deletions

diff --git a/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/AbstractDTreeEditor.java b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/AbstractDTreeEditor.java
index d92df6a8c5..4106c171ad 100644
--- a/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/AbstractDTreeEditor.java
+++ b/plugins/org.eclipse.sirius.ui/src/org/eclipse/sirius/ui/tools/internal/editor/AbstractDTreeEditor.java
@@ -49,6 +49,7 @@ import org.eclipse.sirius.tools.api.permission.DRepresentationPermissionStatusQu
 import org.eclipse.sirius.ui.business.api.dialect.DialectEditor;
 import org.eclipse.sirius.ui.business.api.dialect.DialectEditorDialogFactory;
 import org.eclipse.sirius.ui.business.api.session.IEditingSession;
+import org.eclipse.sirius.ui.business.api.session.SessionEditorInput;
 import org.eclipse.sirius.ui.business.api.session.SessionUIManager;
 import org.eclipse.sirius.ui.business.internal.dialect.TreeEditorDialogFactory;
 import org.eclipse.sirius.ui.tools.api.properties.DTablePropertySheetpage;
@@ -526,6 +527,11 @@ public abstract class AbstractDTreeEditor extends EditorPart implements DialectE
         if (getTableViewer() != null) {
             getTableViewer().dispose();
         }
+        // Dispose the session editor input to keep the minimum information to
+        // be restore from the INavigationHistory and EditorHistory.
+        if (getEditorInput() instanceof SessionEditorInput) {
+            ((SessionEditorInput) getEditorInput()).dispose();
+        }
     }
 
     /**