/**
* Copyright (c) 2015 committers of YAKINDU 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:
* committers of YAKINDU - initial API and implementation
*
*/
package org.yakindu.sct.ui.editor.proposals;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.eclipse.draw2d.IFigure;
import org.eclipse.gef.GraphicalViewer;
import org.eclipse.gmf.runtime.diagram.ui.editparts.IGraphicalEditPart;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.jface.fieldassist.ContentProposal;
import org.eclipse.jface.fieldassist.IContentProposal;
import org.eclipse.jface.fieldassist.IContentProposalProvider;
import org.eclipse.jface.fieldassist.IControlContentAdapter;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.yakindu.sct.domain.extension.DomainRegistry;
import org.yakindu.sct.domain.extension.IDomain;
import org.yakindu.sct.ui.editor.StatechartImages;
import com.google.inject.Inject;
import com.google.inject.Injector;
/**
* As a composite instances of this class provide an array of proposals that are
* assembled from the a set of proposal providers.
*
* @author terfloth - initial contribution
*/
public class ContentProposalHandler implements IContentProposalProvider {
@Inject
protected Set<IEditProposalProvider> proposalProviders;
protected GraphicalViewer viewer;
private IControlContentAdapter proposalControlAdapter;
private ILabelProvider proposalLabelProvider;
public ContentProposalHandler(GraphicalViewer viewer) {
super();
this.viewer = viewer;
this.proposalControlAdapter = new ProposalControlAdapter();
this.proposalLabelProvider = new ProposalLabelProvider();
}
public IControlContentAdapter getProposalControlAdapter() {
return proposalControlAdapter;
}
public ILabelProvider getProposalLabelProvider() {
return proposalLabelProvider;
}
@Override
public IContentProposal[] getProposals(String contents, int position) {
initProposalProvidersOnDemand();
List<IEditProposal> editProposals = collectEditProposals();
editProposals = sort(editProposals);
return contentProposalsFrom(editProposals);
}
protected void initProposalProvidersOnDemand() {
if (proposalProviders == null) {
IDomain domain = DomainRegistry.getDomain(getSelectedView().getElement());
Injector injector = domain.getInjector(IDomain.FEATURE_EDITOR);
injector.injectMembers(this);
}
}
/**
* Collects all edit proposals from contained poroposal providers.
*
* @return
*/
protected List<IEditProposal> collectEditProposals() {
List<IEditProposal> proposals = new ArrayList<IEditProposal>();
// collect all IEditProposals
View selectedView = getSelectedView();
if (selectedView != null) {
if (proposalProviders != null) {
for (IEditProposalProvider provider : proposalProviders) {
for (IEditProposal editProposal : provider.getProposals(selectedView)) {
if (editProposal.isApplicable())
proposals.add(editProposal);
}
}
}
}
return proposals;
}
/**
* @return the first selected view from the graphical viewer or null
*/
protected View getSelectedView() {
View selectedView = null;
if (viewer.getSelectedEditParts().size() > 0) {
if (viewer.getSelectedEditParts().get(0) instanceof IGraphicalEditPart) {
selectedView = ((IGraphicalEditPart) viewer.getSelectedEditParts().get(0)).getNotationView();
}
}
return selectedView;
}
/**
* A hook for sorting the proposals.
*
* @param the
* original list of proposals
* @return A sorted proposal list
*/
protected List<IEditProposal> sort(List<IEditProposal> proposals) {
// currently we do nothing here.
return proposals;
}
/**
* Wraps the edit proposals in jface IContentProposal instances.
*
* @param editProposals
* @return
*/
protected IContentProposal[] contentProposalsFrom(List<IEditProposal> editProposals) {
IContentProposal[] contentProposals = new IContentProposal[editProposals.size()];
for (int i = 0; i < editProposals.size(); i++) {
contentProposals[i] = new EditProposalWrapper(editProposals.get(i));
}
return contentProposals;
}
/**
* @param id
* The id of a proposal.
* @return The proposal that matches the specified id or null.
*/
protected IEditProposal getProposalById(String id) {
List<IEditProposal> editProposals = collectEditProposals();
if (id != null) {
for (IEditProposal editProposal : editProposals) {
if (id.equals(editProposal.getId()))
return editProposal;
}
}
return null;
}
/**
*
* @author terfloth
*/
protected static class EditProposalWrapper extends ContentProposal {
protected IEditProposal wrappedProposal;
public EditProposalWrapper(IEditProposal editProposal) {
super(editProposal.getId(), editProposal.getLabel(), editProposal.getDescription());
this.wrappedProposal = editProposal;
}
public IEditProposal getEditProposal() {
return wrappedProposal;
}
}
/**
* @author terfloth
*/
public static class ProposalLabelProvider extends LabelProvider {
protected Image defaultImage;
public ProposalLabelProvider() {
defaultImage = StatechartImages.SUB_STATECHART_PICTOGRAM.image();
}
@Override
public String getText(Object element) {
if (element instanceof IContentProposal) {
return ((IContentProposal) element).getLabel();
}
return super.getText(element);
}
@Override
public Image getImage(Object element) {
Image image = null;
if (element instanceof EditProposalWrapper) {
image = ((EditProposalWrapper) element).getEditProposal().getImage();
}
return (image != null) ? image : defaultImage;
}
}
/**
*
* @author andreas muelder - Initial contribution and API
*
*/
protected class ProposalControlAdapter implements IControlContentAdapter {
public Rectangle getInsertionBounds(Control control) {
IFigure figure = ((IGraphicalEditPart) viewer.getSelectedEditParts().get(0)).getFigure();
org.eclipse.draw2d.geometry.Rectangle bounds = figure.getBounds().getCopy();
figure.translateToAbsolute(bounds);
return new Rectangle(bounds.getTopRight().x, bounds.getTopRight().y, 100, 0);
}
public void insertControlContents(Control control, String id, int cursorPosition) {
IEditProposal proposal = getProposalById(id);
// TODO:Multi selection
if (proposal.isApplicable())
proposal.apply();
}
public String getControlContents(Control control) {
// Nothing to do
return null;
}
public int getCursorPosition(Control control) {
// Nothing to do
return 0;
}
public void setCursorPosition(Control control, int index) {
// Nothing to do
}
public void setControlContents(Control control, String contents, int cursorPosition) {
// Nothing to do
}
}
}