Description Laurent Redor 2020-11-27 11:05:04 EST

Currently, in Sirius 6.4.0, the arrange at opening ignores other elements. It is expected to have possible overlap with other existing nodes (this is another improvement). But the top-left margins added for the new layouted elements should be the same than during the arrange all.

There is for example an overlap between the container title and new nodes in it.

Steps to reproduce:
* Create a modeling project with data from "gitSiriusRepo\org.eclipse.sirius\plugins\org.eclipse.sirius.tests.junit\data\unit\layout\withELK"
* Open the diagram "diagramWithContainer" of "packageForArrangeSelectionTest"
* Launch an arrange all
* Expected: No overlap between containers title and content of theses containers: OK
* Save
* Close the diagram
* Replace the My.ecore file with the file contained in "gitSiriusRepo\org.eclipse.sirius\plugins\org.eclipse.sirius.tests.junit\data\unit\layout\withELK\replace"
* Open the diagram "diagramWithContainer"
* Expected: No overlap between containers title and content of theses containers: KO
    * New class "Class2_2_3" overlaps, or almost, the title of container "p2_2". This class should be on the same location than "Class2_2_1".
    * New class "Class1_4" overlaps title of container "p1". This class should be on the same location than "Class1_2" and new class "Class1_3" should be on the same location than "Class1_1".

There are 2 "TODO" comments in org.eclipse.sirius.tests.unit.diagram.layout.SimpleELKLayoutTest.testArrangeAtOpening1(), and 2 others similar in testArrangeAtOpening2(), to validate this change.