//package org.eclipse.gmf.example.lesscode.diagram.edit.policies;
//
//import java.util.ArrayList;
//import java.util.Collection;
//import java.util.Iterator;
//import java.util.LinkedList;
//import java.util.List;
//
//import org.eclipse.core.runtime.IAdaptable;
//import org.eclipse.emf.ecore.EObject;
//import org.eclipse.emf.ecore.EStructuralFeature;
//import org.eclipse.gef.EditPart;
//import org.eclipse.gef.commands.Command;
//import org.eclipse.gmf.example.lesscode.LesscodePackage;
//import org.eclipse.gmf.example.lesscode.diagram.edit.parts.Subject2EditPart;
//import org.eclipse.gmf.example.lesscode.diagram.part.LesscodeDiagramUpdater;
//import org.eclipse.gmf.example.lesscode.diagram.part.LesscodeNodeDescriptor;
//import org.eclipse.gmf.example.lesscode.diagram.part.LesscodeVisualIDRegistry;
//import org.eclipse.gmf.runtime.diagram.core.util.ViewUtil;
//import org.eclipse.gmf.runtime.diagram.ui.commands.DeferredLayoutCommand;
//import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
//import org.eclipse.gmf.runtime.diagram.ui.commands.SetViewMutabilityCommand;
//import org.eclipse.gmf.runtime.diagram.ui.editpolicies.CanonicalEditPolicy;
//import org.eclipse.gmf.runtime.diagram.ui.requests.CreateViewRequest;
//import org.eclipse.gmf.runtime.emf.core.util.EObjectAdapter;
//import org.eclipse.gmf.runtime.notation.Node;
//import org.eclipse.gmf.runtime.notation.View;
//
///**
// * @generated
// */
//public class SubjectInSubject2CanonicalEditPolicy extends CanonicalEditPolicy {
//
// /**
// * @generated
// */
// protected void refreshOnActivate() {
// // Need to activate editpart children before invoking the canonical refresh for EditParts to add event listeners
// List<?> c = getHost().getChildren();
// for (int i = 0; i < c.size(); i++) {
// ((EditPart) c.get(i)).activate();
// }
// super.refreshOnActivate();
// }
//
// /**
// * @generated
// */
// protected EStructuralFeature getFeatureToSynchronize() {
// return LesscodePackage.eINSTANCE.getSubject_RecursiveContainment();
// }
//
// /**
// * @generated
// */
// @SuppressWarnings("rawtypes")
// protected List getSemanticChildrenList() {
// View viewObject = (View) getHost().getModel();
// LinkedList<EObject> result = new LinkedList<EObject>();
// List<LesscodeNodeDescriptor> childDescriptors = LesscodeDiagramUpdater.getSubjectInSubject_7002SemanticChildren(viewObject);
// for (LesscodeNodeDescriptor d : childDescriptors) {
// result.add(d.getModelElement());
// }
// return result;
// }
//
// /**
// * @generated
// */
// protected boolean isOrphaned(Collection<EObject> semanticChildren, final View view) {
// return isMyDiagramElement(view) && !semanticChildren.contains(view.getElement());
// }
//
// /**
// * @generated
// */
// private boolean isMyDiagramElement(View view) {
// return Subject2EditPart.VISUAL_ID == LesscodeVisualIDRegistry.getVisualID(view);
// }
//
// /**
// * @generated
// */
// protected void refreshSemantic() {
// if (resolveSemanticElement() == null) {
// return;
// }
// LinkedList<IAdaptable> createdViews = new LinkedList<IAdaptable>();
// List<LesscodeNodeDescriptor> childDescriptors = LesscodeDiagramUpdater.getSubjectInSubject_7002SemanticChildren((View) getHost().getModel());
// LinkedList<View> orphaned = new LinkedList<View>();
// // we care to check only views we recognize as ours
// LinkedList<View> knownViewChildren = new LinkedList<View>();
// for (View v : getViewChildren()) {
// if (isMyDiagramElement(v)) {
// knownViewChildren.add(v);
// }
// }
// // alternative to #cleanCanonicalSemanticChildren(getViewChildren(), semanticChildren)
// //
// // iteration happens over list of desired semantic elements, trying to find best matching View, while original CEP
// // iterates views, potentially losing view (size/bounds) information - i.e. if there are few views to reference same EObject, only last one
// // to answer isOrphaned == true will be used for the domain element representation, see #cleanCanonicalSemanticChildren()
// for (Iterator<LesscodeNodeDescriptor> descriptorsIterator = childDescriptors.iterator(); descriptorsIterator.hasNext();) {
// LesscodeNodeDescriptor next = descriptorsIterator.next();
// String hint = LesscodeVisualIDRegistry.getType(next.getVisualID());
// LinkedList<View> perfectMatch = new LinkedList<View>(); // both semanticElement and hint match that of NodeDescriptor
// for (View childView : getViewChildren()) {
// EObject semanticElement = childView.getElement();
// if (next.getModelElement().equals(semanticElement)) {
// if (hint.equals(childView.getType())) {
// perfectMatch.add(childView);
// // actually, can stop iteration over view children here, but
// // may want to use not the first view but last one as a 'real' match (the way original CEP does
// // with its trick with viewToSemanticMap inside #cleanCanonicalSemanticChildren
// }
// }
// }
// if (perfectMatch.size() > 0) {
// descriptorsIterator.remove(); // precise match found no need to create anything for the NodeDescriptor
// // use only one view (first or last?), keep rest as orphaned for further consideration
// knownViewChildren.remove(perfectMatch.getFirst());
// }
// }
// // those left in knownViewChildren are subject to removal - they are our diagram elements we didn't find match to,
// // or those we have potential matches to, and thus need to be recreated, preserving size/location information.
// orphaned.addAll(knownViewChildren);
// //
// ArrayList<CreateViewRequest.ViewDescriptor> viewDescriptors = new ArrayList<CreateViewRequest.ViewDescriptor>(childDescriptors.size());
// for (LesscodeNodeDescriptor next : childDescriptors) {
// String hint = LesscodeVisualIDRegistry.getType(next.getVisualID());
// IAdaptable elementAdapter = new CanonicalElementAdapter(next.getModelElement(), hint);
// CreateViewRequest.ViewDescriptor descriptor = new CreateViewRequest.ViewDescriptor(elementAdapter, Node.class, hint, ViewUtil.APPEND, false, host().getDiagramPreferencesHint());
// viewDescriptors.add(descriptor);
// }
//
// boolean changed = deleteViews(orphaned.iterator());
// //
// CreateViewRequest request = getCreateViewRequest(viewDescriptors);
// Command cmd = getCreateViewCommand(request);
// if (cmd != null && cmd.canExecute()) {
// SetViewMutabilityCommand.makeMutable(new EObjectAdapter(host().getNotationView())).execute();
// executeCommand(cmd);
// @SuppressWarnings("unchecked")
// List<IAdaptable> nl = (List<IAdaptable>) request.getNewObject();
// createdViews.addAll(nl);
// }
// if (changed || createdViews.size() > 0) {
// postProcessRefreshSemantic(createdViews);
// }
// if (createdViews.size() > 1) {
// // perform a layout of the container
// DeferredLayoutCommand layoutCmd = new DeferredLayoutCommand(host().getEditingDomain(), createdViews, host());
// executeCommand(new ICommandProxy(layoutCmd));
// }
//
// makeViewsImmutable(createdViews);
// }
//}
