/*
* Copyright 2003-2016 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.ide.editor.tabs;
import jetbrains.mps.ide.editorTabs.tabfactory.TabsComponent;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.mps.openapi.event.SNodeAddEvent;
import org.jetbrains.mps.openapi.event.SNodeRemoveEvent;
import org.jetbrains.mps.openapi.model.SModel;
import org.jetbrains.mps.openapi.module.SModule;
import org.jetbrains.mps.openapi.module.SRepository;
import org.jetbrains.mps.openapi.module.SRepositoryContentAdapter;
import org.jetbrains.mps.openapi.repository.CommandListener;
/**
* Listener for model changes specific to tabbed editors.
* It's the only listener that tracks model changes (i.e. TabsComponent shall not attach own model listeners).
* Perhaps, the listener shall be shared between multiple editors (no point in having separate listener instance per each open editor;
* tab controller field shall either indicate active editor or, in case few simultaneously active editors possible (e.g. separate detached windows),
* there should be a collection of controllers to get notified)
* <p/>
* FIXME for the time being, treats any model/root node removal as worth tab rebuild, perhaps shall respect actual documents (TabsComponent#getAllEditedDocuments())
* FIXME or TabEditorLayout to rebuild only affected editors
*
* @author Artem Tikhomirov
*/
class RepoChangeListener extends SRepositoryContentAdapter {
private boolean myChangedRoots = false;
@Nullable
private TabsComponent myTabController;
/*package*/ void setTabController(@Nullable TabsComponent tabController) {
myTabController = tabController;
}
@Override
protected boolean isIncluded(SModule module) {
return !module.isReadOnly();
}
@Override
protected void startListening(SModel model) {
model.addChangeListener(this);
}
@Override
protected void stopListening(SModel model) {
model.removeChangeListener(this);
}
@Override
public void modelAdded(SModule module, SModel model) {
super.modelAdded(module, model);
myChangedRoots = true;
}
@Override
public void beforeModelRemoved(SModule module, SModel model) {
super.beforeModelRemoved(module, model);
myChangedRoots = true;
}
@Override
public void nodeAdded(@NotNull SNodeAddEvent event) {
if (event.isRoot()) {
myChangedRoots = true;
}
}
@Override
public void nodeRemoved(@NotNull SNodeRemoveEvent event) {
if (event.isRoot()) {
myChangedRoots = true;
}
}
@Override
public void commandStarted(SRepository repository) {
myChangedRoots = false;
}
@Override
public void commandFinished(SRepository repository) {
if (myChangedRoots && myTabController != null) {
myTabController.updateTabs();
}
myChangedRoots = false;
}
}