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/*******************************************************************************
* Copyright (c) 2008-2010 Sonatype, Inc.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sonatype, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.m2e.editor.pom;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.emf.common.command.BasicCommandStack;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.common.command.CompoundCommand;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
import org.eclipse.emf.edit.command.SetCommand;
import org.eclipse.jface.text.IUndoManager;
/**
* @author Anton Kraev
*/
public class NotificationCommandStack extends BasicCommandStack {
private MavenPomEditor editor;
private List<MavenPomEditorPage> pages;
private boolean isDirty = false;
public NotificationCommandStack(MavenPomEditor editor) {
this.editor = editor;
this.pages = editor.getPages();
}
@Override
public void execute(Command command) {
processCommand(command, false);
IUndoManager undoManager = editor.getSourcePage().getTextViewer().getUndoManager();
undoManager.beginCompoundChange();
try {
super.execute(command);
} finally {
undoManager.endCompoundChange();
}
processCommand(command, true);
fireDirty();
}
private void processCommand(Command command, boolean add) {
if (command instanceof CompoundCommand) {
CompoundCommand compoundCommand = (CompoundCommand) command;
Iterator<Command> commands = compoundCommand.getCommandList().iterator();
while (commands.hasNext()) {
processCommand(commands.next(), add);
}
}
if (command instanceof AddCommand) {
AddCommand addCommand = (AddCommand) command;
Iterator<?> it = addCommand.getCollection().iterator();
while (it.hasNext()) {
processListeners(it.next(), add);
}
}
if (command instanceof SetCommand) {
SetCommand setCommand = (SetCommand) command;
processListeners(setCommand.getValue(), add);
}
if (command instanceof RemoveCommand) {
RemoveCommand removeCommand = (RemoveCommand) command;
Collection<?> collection = removeCommand.getCollection();
if(collection!=null) {
Iterator<?> it = collection.iterator();
while (it.hasNext()) {
Object next = it.next();
if (next instanceof EObject) {
EObject object = (EObject) next;
for (int i=0; i<pages.size(); i++) {
object.eAdapters().remove(pages.get(i));
}
}
}
}
}
}
private void processListeners(Object next, boolean add) {
if (next instanceof EObject) {
EObject object = (EObject) next;
for (int i=0; i<pages.size(); i++) {
if (add) {
if (!object.eAdapters().contains(pages.get(i)))
object.eAdapters().add(pages.get(i));
} else {
object.eAdapters().remove(pages.get(i));
}
}
}
}
@Override
public void redo() {
super.redo();
fireDirty();
}
private void fireDirty() {
if (isDirty != isSaveNeeded()) {
editor.editorDirtyStateChanged();
}
isDirty = isSaveNeeded();
}
@Override
public void undo() {
super.undo();
fireDirty();
}
}
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