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/*******************************************************************************
* Copyright (c) 2010, 2012 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.ui.internal.e4.compatibility;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.inject.Inject;
import javax.inject.Named;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.ui.model.application.MApplication;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.services.IServiceConstants;
import org.eclipse.e4.ui.workbench.modeling.ESelectionService;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.INullSelectionListener;
import org.eclipse.ui.ISelectionListener;
import org.eclipse.ui.ISelectionService;
import org.eclipse.ui.ISources;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.internal.WorkbenchPage;
public class SelectionService implements ISelectionChangedListener, ISelectionService {
@Inject
private IEclipseContext context;
@Inject
private MApplication application;
private ESelectionService selectionService;
@Inject
@Optional
@Named("org.eclipse.ui.IWorkbenchPage")
private WorkbenchPage page;
private IWorkbenchPart activePart;
private ListenerList listeners = new ListenerList();
private ListenerList postSelectionListeners = new ListenerList();
private Map<String, Set<ISelectionListener>> targetedListeners = new HashMap<String, Set<ISelectionListener>>();
private Map<String, Set<ISelectionListener>> targetedPostSelectionListeners = new HashMap<String, Set<ISelectionListener>>();
private org.eclipse.e4.ui.workbench.modeling.ISelectionListener listener = new org.eclipse.e4.ui.workbench.modeling.ISelectionListener() {
public void selectionChanged(MPart part, Object selection) {
selection = createCompatibilitySelection(selection);
context.set(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);
IEclipseContext applicationContext = application.getContext();
if (applicationContext.getActiveChild() == context) {
application.getContext().set(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);
}
Object client = part.getObject();
if (client instanceof CompatibilityPart) {
IWorkbenchPart workbenchPart = ((CompatibilityPart) client).getPart();
notifyListeners(part.getElementId(), workbenchPart, (ISelection) selection);
}
}
};
private org.eclipse.e4.ui.workbench.modeling.ISelectionListener postListener = new org.eclipse.e4.ui.workbench.modeling.ISelectionListener() {
public void selectionChanged(MPart part, Object selection) {
selection = createCompatibilitySelection(selection);
Object client = part.getObject();
if (client instanceof CompatibilityPart) {
IWorkbenchPart workbenchPart = ((CompatibilityPart) client).getPart();
notifyPostSelectionListeners(part.getElementId(), workbenchPart,
(ISelection) selection);
}
}
};
private static ISelection createCompatibilitySelection(Object selection) {
if (selection instanceof ISelection) {
return (ISelection) selection;
}
return selection == null ? StructuredSelection.EMPTY : new StructuredSelection(
selection);
}
/**
* Updates the selection of the workbench window with that of the active
* part's.
*
* @param activePart
* the currently active part
*/
public void updateSelection(IWorkbenchPart activePart) {
if (activePart != null) {
ISelectionProvider selectionProvider = activePart.getSite().getSelectionProvider();
if (selectionProvider != null) {
ISelection selection = selectionProvider.getSelection();
context.set(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);
IEclipseContext applicationContext = application.getContext();
if (applicationContext.getActiveChild() == context) {
application.getContext().set(ISources.ACTIVE_CURRENT_SELECTION_NAME, selection);
}
notifyListeners(activePart.getSite().getId(), activePart, selection);
notifyPostSelectionListeners(activePart.getSite().getId(), activePart, selection);
}
}
}
@Inject
void setPart(@Optional @Named(IServiceConstants.ACTIVE_PART) final MPart part) {
activePart = null;
if (part != null) {
Object client = part.getObject();
if (client instanceof CompatibilityPart) {
IWorkbenchPart workbenchPart = ((CompatibilityPart) client).getPart();
activePart = workbenchPart;
}
}
}
@Inject
void setSelectionService(@Optional ESelectionService selectionService) {
if (this.selectionService != null) {
this.selectionService.removeSelectionListener(listener);
this.selectionService.removePostSelectionListener(postListener);
}
if (selectionService != null) {
selectionService.addSelectionListener(listener);
selectionService.addPostSelectionListener(postListener);
this.selectionService = selectionService;
}
}
private void notifyListeners(String id, IWorkbenchPart workbenchPart, ISelection selection) {
for (Object listener : listeners.getListeners()) {
if (selection != null || listener instanceof INullSelectionListener) {
((ISelectionListener) listener).selectionChanged(workbenchPart, selection);
}
}
if (id != null) {
Set<ISelectionListener> listeners = targetedListeners.get(id);
if (listeners != null) {
for (ISelectionListener listener : listeners) {
if (selection != null || listener instanceof INullSelectionListener) {
listener.selectionChanged(workbenchPart, selection);
}
}
}
}
}
private void notifyPostSelectionListeners(String id, IWorkbenchPart workbenchPart, ISelection selection) {
for (Object listener : postSelectionListeners.getListeners()) {
if (selection != null || listener instanceof INullSelectionListener) {
((ISelectionListener) listener).selectionChanged(workbenchPart, selection);
}
}
if (id != null) {
Set<ISelectionListener> listeners = targetedPostSelectionListeners.get(id);
if (listeners != null) {
for (ISelectionListener listener : listeners) {
if (selection != null || listener instanceof INullSelectionListener) {
listener.selectionChanged(workbenchPart, selection);
}
}
}
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#addSelectionListener(org.eclipse.ui.
* ISelectionListener)
*/
public void addSelectionListener(ISelectionListener listener) {
listeners.add(listener);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#addSelectionListener(java.lang.String,
* org.eclipse.ui.ISelectionListener)
*/
public void addSelectionListener(String partId, ISelectionListener listener) {
Set<ISelectionListener> listeners = targetedListeners.get(partId);
if (listeners == null) {
listeners = new HashSet<ISelectionListener>();
targetedListeners.put(partId, listeners);
}
listeners.add(listener);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#addPostSelectionListener(org.eclipse
* .ui.ISelectionListener)
*/
public void addPostSelectionListener(ISelectionListener listener) {
postSelectionListeners.add(listener);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#addPostSelectionListener(java.lang.String
* , org.eclipse.ui.ISelectionListener)
*/
public void addPostSelectionListener(String partId, ISelectionListener listener) {
Set<ISelectionListener> listeners = targetedPostSelectionListeners.get(partId);
if (listeners == null) {
listeners = new HashSet<ISelectionListener>();
targetedPostSelectionListeners.put(partId, listeners);
}
listeners.add(listener);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.ISelectionService#getSelection()
*/
public ISelection getSelection() {
if (activePart != null) {
// get the selection from the active part
ISelectionProvider selectionProvider = activePart.getSite().getSelectionProvider();
return selectionProvider == null ? null : selectionProvider.getSelection();
}
Object selection = selectionService.getSelection();
if (selection == null || selection instanceof ISelection) {
return (ISelection) selection;
}
return new StructuredSelection(selection);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.ui.ISelectionService#getSelection(java.lang.String)
*/
public ISelection getSelection(String partId) {
Object selection = selectionService.getSelection(partId);
if (selection == null || selection instanceof ISelection) {
return (ISelection) selection;
}
return new StructuredSelection(selection);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#removeSelectionListener(org.eclipse.
* ui.ISelectionListener)
*/
public void removeSelectionListener(ISelectionListener listener) {
listeners.remove(listener);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#removeSelectionListener(java.lang.String
* , org.eclipse.ui.ISelectionListener)
*/
public void removeSelectionListener(String partId, ISelectionListener listener) {
Set<ISelectionListener> listeners = targetedListeners.get(partId);
if (listeners != null) {
listeners.remove(listener);
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#removePostSelectionListener(org.eclipse
* .ui.ISelectionListener)
*/
public void removePostSelectionListener(ISelectionListener listener) {
postSelectionListeners.remove(listener);
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.ui.ISelectionService#removePostSelectionListener(java.lang
* .String, org.eclipse.ui.ISelectionListener)
*/
public void removePostSelectionListener(String partId, ISelectionListener listener) {
Set<ISelectionListener> listeners = targetedPostSelectionListeners.get(partId);
if (listeners != null) {
listeners.remove(listener);
}
}
/*
* (non-Javadoc)
*
* @see
* org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(
* org.eclipse.jface.viewers.SelectionChangedEvent)
*/
public void selectionChanged(SelectionChangedEvent e) {
MPart part = page.findPart(activePart);
ESelectionService selectionService = (ESelectionService) part.getContext().get(
ESelectionService.class.getName());
selectionService.setSelection(e.getSelection());
}
}
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