Incomplete completion menu in extended base language editors

Hi,

substitutions, by default, work when you select the whole editor. If you want substitutions to be triggered on a single cell ("next applicable editor" in your case), you need to indicate that in its "menu" property (Inspector) as follows:

menu parts:
    replace node (custom node concept)
    replace with : Expression

Vaclav

Thanks a lot for the quick response! Precise and helpful as always! :)

Hm, if I add the menu parts to the next applicable editor as you said substitutions still not work.

However, adding the menu parts to the constant in the editor gives me in the code a completion menu on pressing ctrl+alt (with the cursor at the constant). Any ideas?

Okay, found a workaround. The problem is that for "next applicable editor" the generator doesn't provide substitute information (editorCell.setSubstituteInfo()).

Thus, I created a custom cell provider to workaround the issue:

public class CustomNextApplicableEditor extends AbstractCellProvider { 
 
 private EditorContext myContext; 
 private node<> myNode; 
 
 private static concept<> myConcept; 
 private ConceptEditor myConceptEditor; 
 
 
 public CustomNextApplicableEditor(EditorContext context, node<> node, ConceptEditor conceptEditor, concept<> concept) { 
 myContext = context; 
 myNode = node; 
 myConceptEditor = conceptEditor; 
 myConcept = concept; 
 } 
 
 public EditorCell createEditorCell(EditorContext context) { 
 EditorCell nextApplicableEditor = context.getCellFactory().createEditorCell(myNode, false, myConceptEditor.getClass()); 
 // workaround: remove the cell id as it will be set by the custom cell. 
 // otherwise, we would end in an assertion error due to conflicting cell ids. 
 try { 
 Field myCellId = EditorCell_Basic.class.getDeclaredField("myCellId"); 
 myCellId.setAccessible(true); 
 myCellId.set(nextApplicableEditor, null); 
 } catch (NoSuchFieldException e) { 
 error "No field myCellId in " + nextApplicableEditor.getClass(), e; 
 } catch (IllegalAccessException e) { 
 error "IllegalAccessException " + nextApplicableEditor.getClass(), e; 
 } 
 nextApplicableEditor.setBig(true); 
 nextApplicableEditor.setSubstituteInfo(new CompositeSubstituteInfo(myContext, new BasicCellContext(myNode), new SubstituteInfoPartExt[]{new ReplaceWith_Expression_cellMenu()})); 
 return nextApplicableEditor; 
 } 
 
 
 public static class ReplaceWith_Expression_cellMenu extends AbstractCellMenuPart_ReplaceNode_CustomNodeConcept { 
 
 public ReplaceWith_Expression_cellMenu() { 
 <no statements> 
 } 
 protected String getReplacementConceptName() { 
 return myConcept.toString(); 
 } 
 } 
}

Benjamin, thank you for your feedback.

I've created the issue:

https://youtrack.jetbrains.com/issue/MPS-24114

It will be fixed in the next release