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/*******************************************************************************
* Copyright (c) 2011, 2017 THALES GLOBAL SERVICES and others.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.sirius.ui.tools.internal.views.common.navigator;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import org.eclipse.core.resources.IFile;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.sirius.business.api.query.DRepresentationQuery;
import org.eclipse.sirius.business.api.session.Session;
import org.eclipse.sirius.business.api.session.SessionManager;
import org.eclipse.sirius.ui.business.api.dialect.DialectEditor;
import org.eclipse.sirius.ui.business.api.dialect.DialectUIManager;
import org.eclipse.sirius.ui.business.api.session.IEditingSession;
import org.eclipse.sirius.ui.business.api.session.SessionEditorInput;
import org.eclipse.sirius.ui.business.api.session.SessionUIManager;
import org.eclipse.sirius.ui.tools.internal.views.common.item.RepresentationItemImpl;
import org.eclipse.sirius.viewpoint.DRepresentation;
import org.eclipse.sirius.viewpoint.DRepresentationDescriptor;
import org.eclipse.sirius.viewpoint.DSemanticDecorator;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.ResourceUtil;
import org.eclipse.ui.navigator.ILinkHelper;
import com.google.common.collect.Iterables;
/**
* The current link helper is able to activate an opened editor on the selected representation in a common viewer.
*
* For one or several EObject selection in the Common Navigator, the selection is now handled by the
* <code>SiriusDialectLinkWithEditorSelectionListener</code>.
*
* @author mporhel
*
*/
public class SessionLinkHelper implements ILinkHelper {
/**
* {@inheritDoc}
*/
@Override
public IStructuredSelection findSelection(IEditorInput anInput) {
IStructuredSelection returnSelection = null;
IFile file = ResourceUtil.getFile(anInput);
if (file != null) {
returnSelection = new StructuredSelection(file);
}
IWorkbenchPage page = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage();
IEditorPart editor = page.findEditor(anInput);
if (editor instanceof DialectEditor) {
Collection<DSemanticDecorator> semanticDecorators = DialectUIManager.INSTANCE.getSelection((DialectEditor) editor);
// When the focus is set back on the representation by selecting
// a representation element, we select the corresponding target
// instead of the representation node.
if (!semanticDecorators.isEmpty()) {
List<EObject> elements = new ArrayList<EObject>();
for (DSemanticDecorator currentDecorator : semanticDecorators) {
elements.add(currentDecorator.getTarget());
}
returnSelection = new StructuredSelection(elements);
} else {
// It is possible to get the representation, the associated
// semantic element or even the semantic selection. The choice
// was made to select representation.
DRepresentation editorRepresentation = getEditorRepresentation(anInput, editor);
if (editorRepresentation != null) {
returnSelection = new StructuredSelection(new DRepresentationQuery(editorRepresentation).getRepresentationDescriptor());
}
}
}
return returnSelection == null ? StructuredSelection.EMPTY : returnSelection;
}
private DRepresentation getEditorRepresentation(IEditorInput anInput, IEditorPart editor) {
DRepresentation foundElement = null;
if (anInput instanceof SessionEditorInput) {
SessionEditorInput sessionInput = (SessionEditorInput) anInput;
Session session = sessionInput.getSession(false);
if (session != null && session.isOpen() && editor instanceof DialectEditor) {
foundElement = ((DialectEditor) editor).getRepresentation();
}
}
return foundElement;
}
@Override
public void activateEditor(IWorkbenchPage aPage, IStructuredSelection aSelection) {
if (aPage == null || aSelection == null || aSelection.isEmpty())
return;
Optional.ofNullable(this.getSelectedRepresentationDescriptor(aSelection.toList())).filter(DRepresentationDescriptor::isLoadedRepresentation).ifPresent(repDesc -> {
IEditorPart activeEditor = aPage.getActiveEditor();
if (activeEditor != null) {
Session session = SessionManager.INSTANCE.getSession(repDesc.getTarget());
if (session != null) {
IEditingSession uiSession = SessionUIManager.INSTANCE.getUISession(session);
DRepresentation representation = repDesc.getRepresentation();
if (uiSession != null && representation != null) {
IEditorPart editor = uiSession.getEditor(representation);
if (editor != null && editor.getSite() != null && aPage.equals(editor.getSite().getPage())) {
activeEditor = editor;
aPage.bringToTop(activeEditor);
}
}
}
}
});
}
private DRepresentationDescriptor getSelectedRepresentationDescriptor(Collection<?> selection) {
DRepresentationDescriptor rep = null;
Iterable<DRepresentationDescriptor> selectedRepDescs = Iterables.filter(selection, DRepresentationDescriptor.class);
if (selectedRepDescs.iterator().hasNext()) {
rep = selectedRepDescs.iterator().next();
} else {
Iterable<RepresentationItemImpl> selectedItems = Iterables.filter(selection, RepresentationItemImpl.class);
if (selectedItems.iterator().hasNext()) {
rep = selectedItems.iterator().next().getDRepresentationDescriptor();
}
}
return rep;
}
}
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