194: initial implementation of quickfix

that does not work due to formatting problems

Task-Url: http://github.com/LorenzoBettini/edelta/issues/194

edelta.parent/edelta.ui/src/edelta/ui/quickfix/EdeltaQuickfixProvider.java

@@ -3,15 +3,22 @@
  */
 package edelta.ui.quickfix;
 
+import static edelta.util.EdeltaModelUtil.getContainingBlockXExpression;
+
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.xtext.nodemodel.INode;
 import org.eclipse.xtext.ui.editor.model.edit.IModificationContext;
 import org.eclipse.xtext.ui.editor.quickfix.Fix;
 import org.eclipse.xtext.ui.editor.quickfix.IssueResolutionAcceptor;
 import org.eclipse.xtext.validation.Issue;
+import org.eclipse.xtext.xbase.XBlockExpression;
 import org.eclipse.xtext.xbase.annotations.ui.quickfix.XbaseWithAnnotationsQuickfixProvider;
 
+import com.google.inject.Inject;
+
+import edelta.edelta.EdeltaEcoreReference;
 import edelta.edelta.EdeltaProgram;
+import edelta.resource.derivedstate.EdeltaDerivedStateHelper;
 import edelta.util.EdeltaModelUtil;
 import edelta.validation.EdeltaValidator;
 
@@ -23,6 +30,9 @@
  */
 public class EdeltaQuickfixProvider extends XbaseWithAnnotationsQuickfixProvider {
 
+	@Inject
+	private EdeltaDerivedStateHelper derivedStateHelper;
+
 	@Fix(EdeltaValidator.INVALID_SUBPACKAGE_IMPORT)
 	public void importRootPackage(final Issue issue, final IssueResolutionAcceptor acceptor) {
 		final String rootPackageName = issue.getData()[0];
@@ -94,4 +104,28 @@ public void removeDuplicateMetamodelImport(final Issue issue, final IssueResolut
 		);
 	}
 
+	@Fix(EdeltaValidator.INTERPRETER_ACCESS_NOT_YET_EXISTING_ELEMENT)
+	public void moveToRightPosition(final Issue issue, final IssueResolutionAcceptor acceptor) {
+		acceptor.accept(
+			issue,
+			"Move to the right position",
+			"Move to the right position",
+			"EObject.gif",
+			(EObject element, IModificationContext context) -> {
+				var ecoreRef = (EdeltaEcoreReference) element;
+				var blockExp = getContainingBlockXExpression(ecoreRef);
+				var sourceBlock = (XBlockExpression) blockExp.eContainer();
+				var responsibleExpression =
+					derivedStateHelper.getLastResponsibleExpression(ecoreRef.getEnamedelement());
+				var responsibleExpressionBlockExp = getContainingBlockXExpression(responsibleExpression);
+				var destBlock = (XBlockExpression) responsibleExpression.eContainer();
+				var expressions = destBlock.getExpressions();
+				sourceBlock.getExpressions().remove(blockExp);
+				var responsibleExpressionPosition =
+					expressions.indexOf(responsibleExpressionBlockExp);
+				expressions.add(responsibleExpressionPosition + 1, blockExp);
+			}
+		);
+	}
+
 }