/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.ui.workingsets;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.IElementComparer;
import org.eclipse.ui.ILocalWorkingSetManager;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IWorkingSet;
import org.eclipse.ui.IWorkingSetManager;
import org.eclipse.ui.IWorkingSetUpdater;
import org.eclipse.ui.PlatformUI;
import org.eclipse.wst.jsdt.core.IJavaScriptElement;
import org.eclipse.wst.jsdt.core.IJavaScriptProject;
public class WorkingSetModel {
public static final String CHANGE_WORKING_SET_MODEL_CONTENT= "workingSetModelChanged"; //$NON-NLS-1$
public static final IElementComparer COMPARER= new WorkingSetComparar();
private static final String TAG_LOCAL_WORKING_SET_MANAGER= "localWorkingSetManager"; //$NON-NLS-1$
private static final String TAG_ACTIVE_WORKING_SET= "activeWorkingSet"; //$NON-NLS-1$
private static final String TAG_WORKING_SET_NAME= "workingSetName"; //$NON-NLS-1$
private static final String TAG_CONFIGURED= "configured"; //$NON-NLS-1$
private ILocalWorkingSetManager fLocalWorkingSetManager;
private List fActiveWorkingSets;
private ListenerList fListeners;
private IPropertyChangeListener fWorkingSetManagerListener;
private OthersWorkingSetUpdater fOthersWorkingSetUpdater;
private ElementMapper fElementMapper= new ElementMapper();
private boolean fConfigured;
private static class WorkingSetComparar implements IElementComparer {
public boolean equals(Object o1, Object o2) {
IWorkingSet w1= o1 instanceof IWorkingSet ? (IWorkingSet)o1 : null;
IWorkingSet w2= o2 instanceof IWorkingSet ? (IWorkingSet)o2 : null;
if (w1 == null || w2 == null)
return o1.equals(o2);
return w1 == w2;
}
public int hashCode(Object element) {
if (element instanceof IWorkingSet)
return System.identityHashCode(element);
return element.hashCode();
}
}
private static class ElementMapper {
private Map fElementToWorkingSet= new HashMap();
private Map fWorkingSetToElement= new IdentityHashMap();
private Map fResourceToWorkingSet= new HashMap();
private List fNonProjectTopLevelElements= new ArrayList();
public void clear() {
fElementToWorkingSet.clear();
fWorkingSetToElement.clear();
fResourceToWorkingSet.clear();
fNonProjectTopLevelElements.clear();
}
public void rebuild(IWorkingSet[] workingSets) {
clear();
for (int i= 0; i < workingSets.length; i++) {
put(workingSets[i]);
}
}
public IAdaptable[] remove(IWorkingSet ws) {
IAdaptable[] elements= (IAdaptable[])fWorkingSetToElement.remove(ws);
if (elements != null) {
for (int i= 0; i < elements.length; i++) {
removeElement(elements[i], ws);
}
}
return elements;
}
public IAdaptable[] refresh(IWorkingSet ws) {
IAdaptable[] oldElements= (IAdaptable[])fWorkingSetToElement.get(ws);
if (oldElements == null)
return null;
IAdaptable[] newElements= ws.getElements();
List toRemove= new ArrayList(Arrays.asList(oldElements));
List toAdd= new ArrayList(Arrays.asList(newElements));
computeDelta(toRemove, toAdd, oldElements, newElements);
for (Iterator iter= toAdd.iterator(); iter.hasNext();) {
addElement((IAdaptable)iter.next(), ws);
}
for (Iterator iter= toRemove.iterator(); iter.hasNext();) {
removeElement((IAdaptable)iter.next(), ws);
}
if (toRemove.size() > 0 || toAdd.size() > 0)
fWorkingSetToElement.put(ws, newElements);
return oldElements;
}
private void computeDelta(List toRemove, List toAdd, IAdaptable[] oldElements, IAdaptable[] newElements) {
for (int i= 0; i < oldElements.length; i++) {
toAdd.remove(oldElements[i]);
}
for (int i= 0; i < newElements.length; i++) {
toRemove.remove(newElements[i]);
}
}
public IWorkingSet getFirstWorkingSet(Object element) {
return (IWorkingSet)getFirstElement(fElementToWorkingSet, element);
}
public List getAllWorkingSets(Object element) {
List allElements= getAllElements(fElementToWorkingSet, element);
if (allElements.isEmpty() && element instanceof IJavaScriptElement) {
// try a second time in case the working set was manually updated (bug 168032)
allElements= getAllElements(fElementToWorkingSet, ((IJavaScriptElement) element).getResource());
}
return allElements;
}
public IWorkingSet getFirstWorkingSetForResource(IResource resource) {
return (IWorkingSet)getFirstElement(fResourceToWorkingSet, resource);
}
public List getAllWorkingSetsForResource(IResource resource) {
return getAllElements(fResourceToWorkingSet, resource);
}
public List getNonProjectTopLevelElements() {
return fNonProjectTopLevelElements;
}
private void put(IWorkingSet ws) {
if (fWorkingSetToElement.containsKey(ws))
return;
IAdaptable[] elements= ws.getElements();
fWorkingSetToElement.put(ws, elements);
for (int i= 0; i < elements.length; i++) {
IAdaptable element= elements[i];
addElement(element, ws);
if (!(element instanceof IProject) && !(element instanceof IJavaScriptProject)) {
fNonProjectTopLevelElements.add(element);
}
}
}
private void addElement(IAdaptable element, IWorkingSet ws) {
addToMap(fElementToWorkingSet, element, ws);
IResource resource= (IResource)element.getAdapter(IResource.class);
if (resource != null) {
addToMap(fResourceToWorkingSet, resource, ws);
}
}
private void removeElement(IAdaptable element, IWorkingSet ws) {
removeFromMap(fElementToWorkingSet, element, ws);
IResource resource= (IResource)element.getAdapter(IResource.class);
if (resource != null) {
removeFromMap(fResourceToWorkingSet, resource, ws);
}
}
private void addToMap(Map map, IAdaptable key, IWorkingSet value) {
Object obj= map.get(key);
if (obj == null) {
map.put(key, value);
} else if (obj instanceof IWorkingSet) {
List l= new ArrayList(2);
l.add(obj);
l.add(value);
map.put(key, l);
} else if (obj instanceof List) {
((List)obj).add(value);
}
}
private void removeFromMap(Map map, IAdaptable key, IWorkingSet value) {
Object current= map.get(key);
if (current == null) {
return;
} else if (current instanceof List) {
List list= (List)current;
list.remove(value);
switch (list.size()) {
case 0:
map.remove(key);
break;
case 1:
map.put(key, list.get(0));
break;
}
} else if (current == value) {
map.remove(key);
}
}
private Object getFirstElement(Map map, Object key) {
Object obj= map.get(key);
if (obj instanceof List)
return ((List)obj).get(0);
return obj;
}
private List getAllElements(Map map, Object key) {
Object obj= map.get(key);
if (obj instanceof List)
return (List)obj;
if (obj == null)
return Collections.EMPTY_LIST;
List result= new ArrayList(1);
result.add(obj);
return result;
}
}
/**
* @param memento a memento, or <code>null</code>
*/
public WorkingSetModel(IMemento memento) {
fLocalWorkingSetManager= PlatformUI.getWorkbench().createLocalWorkingSetManager();
addListenersToWorkingSetManagers();
fActiveWorkingSets= new ArrayList(2);
if (memento == null || ! restoreState(memento)) {
IWorkingSet others= fLocalWorkingSetManager.createWorkingSet(WorkingSetMessages.WorkingSetModel_others_name, new IAdaptable[0]);
others.setId(OthersWorkingSetUpdater.ID);
fLocalWorkingSetManager.addWorkingSet(others);
fActiveWorkingSets.add(others);
}
Assert.isNotNull(fOthersWorkingSetUpdater);
fElementMapper.rebuild(getActiveWorkingSets());
fOthersWorkingSetUpdater.updateElements();
}
private void addListenersToWorkingSetManagers() {
fListeners= new ListenerList(ListenerList.IDENTITY);
fWorkingSetManagerListener= new IPropertyChangeListener() {
public void propertyChange(PropertyChangeEvent event) {
workingSetManagerChanged(event);
}
};
PlatformUI.getWorkbench().getWorkingSetManager().addPropertyChangeListener(fWorkingSetManagerListener);
fLocalWorkingSetManager.addPropertyChangeListener(fWorkingSetManagerListener);
}
public void dispose() {
if (fWorkingSetManagerListener != null) {
PlatformUI.getWorkbench().getWorkingSetManager().removePropertyChangeListener(fWorkingSetManagerListener);
fLocalWorkingSetManager.removePropertyChangeListener(fWorkingSetManagerListener);
fLocalWorkingSetManager.dispose();
fWorkingSetManagerListener= null;
}
}
//---- model relationships ---------------------------------------
public IAdaptable[] getChildren(IWorkingSet workingSet) {
return workingSet.getElements();
}
public Object getParent(Object element) {
if (element instanceof IWorkingSet && fActiveWorkingSets.contains(element))
return this;
return fElementMapper.getFirstWorkingSet(element);
}
public Object[] getAllParents(Object element) {
if (element instanceof IWorkingSet && fActiveWorkingSets.contains(element))
return new Object[] {this};
return fElementMapper.getAllWorkingSets(element).toArray();
}
public Object[] addWorkingSets(Object[] elements) {
List result= null;
for (int i= 0; i < elements.length; i++) {
Object element= elements[i];
List sets= null;
if (element instanceof IResource) {
sets= fElementMapper.getAllWorkingSetsForResource((IResource)element);
} else {
sets= fElementMapper.getAllWorkingSets(element);
}
if (sets != null && sets.size() > 0) {
if (result == null)
result= new ArrayList(Arrays.asList(elements));
result.addAll(sets);
}
}
if (result == null)
return elements;
return result.toArray();
}
public boolean needsConfiguration() {
return !fConfigured && fActiveWorkingSets.size() == 1 &&
OthersWorkingSetUpdater.ID.equals(((IWorkingSet)fActiveWorkingSets.get(0)).getId());
}
public void configured() {
fConfigured= true;
}
//---- working set management -----------------------------------
/**
* Adds a property change listener.
*
* @param listener the property change listener to add
*/
public void addPropertyChangeListener(IPropertyChangeListener listener) {
fListeners.add(listener);
}
/**
* Removes the property change listener.
*
* @param listener the property change listener to remove
*/
public void removePropertyChangeListener(IPropertyChangeListener listener) {
fListeners.remove(listener);
}
public IWorkingSet[] getActiveWorkingSets() {
return (IWorkingSet[])fActiveWorkingSets.toArray(new IWorkingSet[fActiveWorkingSets.size()]);
}
public IWorkingSet[] getAllWorkingSets() {
List result= new ArrayList();
result.addAll(fActiveWorkingSets);
IWorkingSet[] locals= fLocalWorkingSetManager.getWorkingSets();
for (int i= 0; i < locals.length; i++) {
if (!result.contains(locals[i]))
result.add(locals[i]);
}
IWorkingSet[] globals= PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSets();
for (int i= 0; i < globals.length; i++) {
if (!result.contains(globals[i]))
result.add(globals[i]);
}
return (IWorkingSet[])result.toArray(new IWorkingSet[result.size()]);
}
public void setActiveWorkingSets(IWorkingSet[] workingSets) {
fActiveWorkingSets= new ArrayList(Arrays.asList(workingSets));
fElementMapper.rebuild(getActiveWorkingSets());
fOthersWorkingSetUpdater.updateElements();
fireEvent(new PropertyChangeEvent(this, CHANGE_WORKING_SET_MODEL_CONTENT, null, null));
}
public void saveState(IMemento memento) {
memento.putString(TAG_CONFIGURED, Boolean.toString(fConfigured));
fLocalWorkingSetManager.saveState(memento.createChild(TAG_LOCAL_WORKING_SET_MANAGER));
for (Iterator iter= fActiveWorkingSets.iterator(); iter.hasNext();) {
IMemento active= memento.createChild(TAG_ACTIVE_WORKING_SET);
IWorkingSet workingSet= (IWorkingSet)iter.next();
active.putString(TAG_WORKING_SET_NAME, workingSet.getName());
}
}
public List getNonProjectTopLevelElements() {
return fElementMapper.getNonProjectTopLevelElements();
}
/**
* Restore localWorkingSetManager and active working sets
* @param memento
* @return whether the restore was successful
*/
private boolean restoreState(IMemento memento) {
String configured= memento.getString(TAG_CONFIGURED);
if (configured == null)
return false;
fConfigured= Boolean.valueOf(configured).booleanValue();
fLocalWorkingSetManager.restoreState(memento.getChild(TAG_LOCAL_WORKING_SET_MANAGER));
IMemento[] actives= memento.getChildren(TAG_ACTIVE_WORKING_SET);
for (int i= 0; i < actives.length; i++) {
String name= actives[i].getString(TAG_WORKING_SET_NAME);
if (name != null) {
IWorkingSet ws= fLocalWorkingSetManager.getWorkingSet(name);
if (ws == null) {
ws= PlatformUI.getWorkbench().getWorkingSetManager().getWorkingSet(name);
}
if (ws != null) {
fActiveWorkingSets.add(ws);
}
}
}
return true;
}
private void workingSetManagerChanged(PropertyChangeEvent event) {
String property= event.getProperty();
if (IWorkingSetManager.CHANGE_WORKING_SET_UPDATER_INSTALLED.equals(property) && event.getSource() == fLocalWorkingSetManager) {
IWorkingSetUpdater updater= (IWorkingSetUpdater)event.getNewValue();
if (updater instanceof OthersWorkingSetUpdater) {
fOthersWorkingSetUpdater= (OthersWorkingSetUpdater)updater;
fOthersWorkingSetUpdater.init(this);
}
return;
}
// don't handle working sets not managed by the model
if (!isAffected(event))
return;
if (IWorkingSetManager.CHANGE_WORKING_SET_CONTENT_CHANGE.equals(property)) {
IWorkingSet workingSet= (IWorkingSet)event.getNewValue();
IAdaptable[] elements= fElementMapper.refresh(workingSet);
if (elements != null) {
fireEvent(event);
}
} else if (IWorkingSetManager.CHANGE_WORKING_SET_REMOVE.equals(property)) {
IWorkingSet workingSet= (IWorkingSet)event.getOldValue();
List elements= new ArrayList(fActiveWorkingSets);
elements.remove(workingSet);
setActiveWorkingSets((IWorkingSet[])elements.toArray(new IWorkingSet[elements.size()]));
} else if (IWorkingSetManager.CHANGE_WORKING_SET_NAME_CHANGE.equals(property)) {
fireEvent(event);
}
}
private void fireEvent(PropertyChangeEvent event) {
Object[] listeners= fListeners.getListeners();
for (int i= 0; i < listeners.length; i++) {
((IPropertyChangeListener)listeners[i]).propertyChange(event);
}
}
private boolean isAffected(PropertyChangeEvent event) {
if (fActiveWorkingSets == null)
return false;
Object oldValue= event.getOldValue();
Object newValue= event.getNewValue();
if ((oldValue != null && fActiveWorkingSets.contains(oldValue))
|| (newValue != null && fActiveWorkingSets.contains(newValue))) {
return true;
}
return false;
}
public boolean isActiveWorkingSet(IWorkingSet changedWorkingSet) {
return fActiveWorkingSets.contains(changedWorkingSet);
}
}