/*
* Copyright 2003-2015 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrains.mps.nodeEditor.updater;
import jetbrains.mps.smodel.RepoListenerRegistrar;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.model.SModelReference;
import org.jetbrains.mps.openapi.model.SNode;
import org.jetbrains.mps.openapi.model.SNodeReference;
import org.jetbrains.mps.openapi.model.SNodeUtil;
import org.jetbrains.mps.openapi.module.SRepository;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* User: shatalin
* Date: 30/10/14
*/
class UpdaterModelListenersController {
private final UpdaterImpl myUpdater;
private UpdaterModelListener myModelListener;
private UpdaterRepositoryContentAdapter myRepositoryListener;
private Set<SModel> myListeningModels = Collections.emptySet();
UpdaterModelListenersController(UpdaterImpl updater) {
myUpdater = updater;
}
void attachListeners(SNode mainNode, Set<SNode> relatedNodes, Set<SNodeReference> relatedRefTargets) {
if (myModelListener == null) {
myModelListener = new UpdaterModelListener(myUpdater);
}
final SRepository repository = myUpdater.getEditorContext().getRepository();
Set<SModel> modelsToListen = new HashSet<SModel>();
if (relatedNodes != null) {
for (SNode node : relatedNodes) {
SModel model = node.getModel();
if (model == null) {
continue;
}
modelsToListen.add(model);
}
}
if (relatedRefTargets != null) {
for (SNodeReference nodeProxy : relatedRefTargets) {
final SModelReference modelRef = nodeProxy.getModelReference();
SModel model = modelRef == null ? null : modelRef.resolve(repository);
if (model != null) {
modelsToListen.add(model);
}
}
}
for (SModel nextModelToListen : modelsToListen) {
if (!myListeningModels.contains(nextModelToListen)) {
myModelListener.startListeningToModel(nextModelToListen);
}
}
for (SModel nextListeningModel : myListeningModels) {
if (!modelsToListen.contains(nextListeningModel)) {
myModelListener.stopListeningToModel(nextListeningModel);
}
}
myListeningModels = modelsToListen;
if (myRepositoryListener == null) {
myRepositoryListener = new UpdaterRepositoryContentAdapter(myUpdater.getEditorComponent());
// it's already read action here (we've got nodes), just for symmetry with detach in dispose(), below.
new RepoListenerRegistrar(repository, myRepositoryListener).attach();
}
myRepositoryListener.setUsedModels(modelsToListen);
myRepositoryListener.setMainModel(mainNode.getModel());
assertListenerAdded(mainNode);
}
private void assertListenerAdded(SNode editedNode) {
// Sometimes EditorComponent doesn't react on ModelReplaced notifications.
// Adding this assertion to ensure the reason is not in incorrectly removed listener (dependencies collection logic)
if (editedNode != null && SNodeUtil.isAccessible(editedNode, myUpdater.getEditorContext().getRepository()) &&
!isListeningModel(editedNode.getModel())) {
String message = "Listener was not added to a containing model of current node. Editor: " + myUpdater.getEditorComponent();
message += "\n modelId: " + editedNode.getModel().getModelId().toString();
message += "\n" + "models with listeners:";
for (SModel model : myListeningModels) {
message += "\n\t" + model.getModelId().toString();
}
assert false : message;
}
}
private boolean isListeningModel(SModel model) {
return myListeningModels.contains(model);
}
void flush() {
if (myModelListener != null) {
myModelListener.flush();
}
}
void dispose() {
if (myRepositoryListener != null) {
new RepoListenerRegistrar(myUpdater.getEditorContext().getRepository(), myRepositoryListener).detach();
}
if (myModelListener != null) {
myModelListener.dispose();
}
}
public void clearCollectedEvents() {
if (myModelListener == null) {
return;
}
myModelListener.clearCollectedEvents();
}
}