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/*******************************************************************************
* Copyright (c) 2013 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.tcf.ui.internal.services;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.tcf.protocol.Protocol;
import org.eclipse.tcf.te.runtime.events.ChangeEvent;
import org.eclipse.tcf.te.runtime.events.EventManager;
import org.eclipse.tcf.te.runtime.persistence.history.HistoryManager;
import org.eclipse.tcf.te.runtime.services.AbstractService;
import org.eclipse.tcf.te.tcf.core.interfaces.IPeerType;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.ILocatorModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel;
import org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModelProperties;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService;
import org.eclipse.tcf.te.tcf.locator.interfaces.services.ILocatorModelLookupService;
import org.eclipse.tcf.te.tcf.locator.model.Model;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
/**
* Default context service implementation.
*/
public class DefaultContextService extends AbstractService implements IDefaultContextService {
/**
* Part id: System Management view
*/
private static final String PART_ID_TE_VIEW = "org.eclipse.tcf.te.ui.views.View"; //$NON-NLS-1$
/**
* Constructor.
*/
public DefaultContextService() {
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService#getCandidates(java.lang.Object, org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService.IContextFilter)
*/
@Override
public IPeerModel[] getCandidates(Object currentSelection, IContextFilter filter) {
List<IPeerModel> candidates = new ArrayList<IPeerModel>();
// add given selection first
if (currentSelection instanceof IStructuredSelection) {
addCandidates((IStructuredSelection)currentSelection, filter, candidates);
}
// add default selection
addCandidates(getDefaultSelections(filter), filter, candidates);
// add active editor
addCandidates(getEditorSelection(), filter, candidates);
// add system management selection
addCandidates(getPartSelection(PART_ID_TE_VIEW), filter, candidates);
return candidates.toArray(new IPeerModel[candidates.size()]);
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService#setDefaultContext(org.eclipse.tcf.te.tcf.locator.interfaces.nodes.IPeerModel)
*/
@Override
public void setDefaultContext(final IPeerModel peerModel) {
if (peerModel != null) {
HistoryManager.getInstance().add(getClass().getName(), peerModel.getPeerId());
EventManager.getInstance().fireEvent(new ChangeEvent(this, ChangeEvent.ID_ADDED, peerModel, peerModel));
final AtomicReference<String> type = new AtomicReference<String>();
Protocol.invokeAndWait(new Runnable() {
@Override
public void run() {
type.set(peerModel.getPeer().getAttributes().get((IPeerModelProperties.PROP_TYPE)));
}
});
HistoryManager.getInstance().add(type.get() != null ? type.get() : IPeerType.TYPE_GENERIC, peerModel.getPeerId());
}
else {
HistoryManager.getInstance().clear(getClass().getName());
EventManager.getInstance().fireEvent(new ChangeEvent(this, ChangeEvent.ID_REMOVED, null, null));
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService#getDefaultContext(org.eclipse.tcf.te.tcf.locator.interfaces.services.IDefaultContextService.IContextFilter)
*/
@Override
public IPeerModel getDefaultContext(IContextFilter filter) {
for (String peerId : HistoryManager.getInstance().getHistory(getClass().getName())) {
IPeerModel peerModel = addCandidate(getPeerModel(peerId), filter, null);
if (peerModel != null) {
return peerModel;
}
}
return null;
}
private IPeerModel addCandidate(IPeerModel peerModel, IContextFilter filter, List<IPeerModel> candidates) {
if (peerModel != null && (filter == null || filter.select(peerModel))) {
if (candidates != null && !candidates.contains(peerModel)) {
candidates.add(peerModel);
}
return peerModel;
}
return null;
}
private void addCandidates(IStructuredSelection selection, IContextFilter filter, List<IPeerModel> candidates) {
if (selection != null) {
Iterator<Object> it = selection.iterator();
while (it.hasNext()) {
addCandidate((IPeerModel)Platform.getAdapterManager().getAdapter(it.next(), IPeerModel.class), filter, candidates);
}
}
}
private void addCandidates(IPeerModel[] peerModels, IContextFilter filter, List<IPeerModel> candidates) {
for (IPeerModel peerModel : peerModels) {
addCandidate(peerModel, filter, candidates);
}
}
private IPeerModel[] getDefaultSelections(IContextFilter filter) {
List<IPeerModel> candidates = new ArrayList<IPeerModel>();
for (String peerId : HistoryManager.getInstance().getHistory(getClass().getName())) {
addCandidate(getPeerModel(peerId), filter, candidates);
}
return candidates.toArray(new IPeerModel[candidates.size()]);
}
private IPeerModel getPeerModel(final String peerId) {
if (peerId != null) {
final AtomicReference<IPeerModel> peerModel = new AtomicReference<IPeerModel>();
Runnable runnable = new Runnable() {
@Override
public void run() {
ILocatorModel model = Model.getModel();
Assert.isNotNull(model);
peerModel.set(model.getService(ILocatorModelLookupService.class).lkupPeerModelById(peerId));
}
};
if (Protocol.isDispatchThread()) {
runnable.run();
}
else {
Protocol.invokeAndWait(runnable);
}
return peerModel.get();
}
return null;
}
private IStructuredSelection getEditorSelection() {
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window != null && window.getActivePage() != null && window.getActivePage().getActiveEditor() != null) {
return new StructuredSelection(window.getActivePage().getActiveEditor().getEditorInput());
}
return null;
}
private IStructuredSelection getPartSelection(String partId) {
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window != null && window.getActivePage() != null) {
ISelection sel = null;
if (partId != null) {
sel = window.getActivePage().getSelection(partId);
}
else {
sel = window.getActivePage().getSelection();
}
if (sel instanceof IStructuredSelection) {
return (IStructuredSelection)sel;
}
}
return null;
}
}
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