| package org.eclipse.gmf.tooling.examples.linklf.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.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; |
| import org.eclipse.gmf.tooling.examples.linklf.LinklfPackage; |
| import org.eclipse.gmf.tooling.examples.linklf.diagram.edit.parts.PortEditPart; |
| import org.eclipse.gmf.tooling.examples.linklf.diagram.part.LinklfDiagramUpdater; |
| import org.eclipse.gmf.tooling.examples.linklf.diagram.part.LinklfNodeDescriptor; |
| import org.eclipse.gmf.tooling.examples.linklf.diagram.part.LinklfVisualIDRegistry; |
| |
| /** |
| * @generated |
| */ |
| public class ContainerCanonicalEditPolicy 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 LinklfPackage.eINSTANCE.getContainer_Porst(); |
| } |
| |
| /** |
| * @generated |
| */ |
| @SuppressWarnings("rawtypes") |
| protected List getSemanticChildrenList() { |
| View viewObject = (View) getHost().getModel(); |
| LinkedList<EObject> result = new LinkedList<EObject>(); |
| List<LinklfNodeDescriptor> childDescriptors = LinklfDiagramUpdater.getContainer_2003SemanticChildren(viewObject); |
| for (LinklfNodeDescriptor 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 PortEditPart.VISUAL_ID == LinklfVisualIDRegistry.getVisualID(view); |
| } |
| |
| /** |
| * @generated |
| */ |
| protected void refreshSemantic() { |
| if (resolveSemanticElement() == null) { |
| return; |
| } |
| LinkedList<IAdaptable> createdViews = new LinkedList<IAdaptable>(); |
| List<LinklfNodeDescriptor> childDescriptors = LinklfDiagramUpdater.getContainer_2003SemanticChildren((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<LinklfNodeDescriptor> descriptorsIterator = childDescriptors.iterator(); descriptorsIterator.hasNext();) { |
| LinklfNodeDescriptor next = descriptorsIterator.next(); |
| String hint = LinklfVisualIDRegistry.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 (LinklfNodeDescriptor next : childDescriptors) { |
| String hint = LinklfVisualIDRegistry.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); |
| } |
| } |