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/*******************************************************************************
* Copyright (c) 2012 protos software gmbh (http://www.protos.de).
* 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:
* Juergen Haug
*
*******************************************************************************/
package org.eclipse.etrice.ui.structure.support;
import java.util.ArrayList;
import org.eclipse.etrice.core.room.ActorClass;
import org.eclipse.etrice.core.room.StructureClass;
import org.eclipse.etrice.ui.structure.support.context.DeleteContext;
import org.eclipse.etrice.ui.structure.support.context.PositionUpdateContext;
import org.eclipse.etrice.ui.structure.support.provider.IPositionProvider;
import org.eclipse.etrice.ui.structure.support.provider.IPositionProvider.PosAndSize;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.IReason;
import org.eclipse.graphiti.features.IUpdateFeature;
import org.eclipse.graphiti.features.context.IUpdateContext;
import org.eclipse.graphiti.features.context.impl.AddContext;
import org.eclipse.graphiti.features.context.impl.UpdateContext;
import org.eclipse.graphiti.features.impl.AbstractUpdateFeature;
import org.eclipse.graphiti.features.impl.Reason;
import org.eclipse.graphiti.mm.algorithms.GraphicsAlgorithm;
import org.eclipse.graphiti.mm.pictograms.Connection;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.mm.pictograms.Shape;
public class DiagramUpdateFeature extends AbstractUpdateFeature {
public DiagramUpdateFeature(IFeatureProvider fp) {
super(fp);
}
@Override
public boolean canUpdate(IUpdateContext context) {
return true;
}
@Override
public IReason updateNeeded(IUpdateContext context) {
StructureClass sc = (StructureClass) getBusinessObjectForPictogramElement(getDiagram());
if(sc instanceof ActorClass && ((ActorClass)sc).getBase() != null)
return new Reason(true);
if(updateConnectionsNeeded(getDiagram()))
return new Reason(true);
if(updateNeeded(getDiagram()))
return new Reason(true);
return new Reason(false);
}
/**
* This just removes dangling connections (bindings and layer connections).
* New ones are added by the structure class support.
*
* @param diagram
* @return
*/
private boolean updateConnectionsNeeded(Diagram diagram) {
boolean needed = false;
for (Connection conn : new ArrayList<Connection>(diagram.getConnections())) {
UpdateContext context = new UpdateContext(conn);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
needed = true;
}
return needed;
}
/**
* @param diagram
* @return
*/
private boolean updateNeeded(ContainerShape container) {
boolean needed = false;
for (Shape child : new ArrayList<Shape>(container.getChildren())) {
if (child instanceof ContainerShape)
if (updateNeeded((ContainerShape) child))
needed = true;
}
// avoid infinite recursion by not entering with diagram again
if (!(container instanceof Diagram)) {
UpdateContext context = new UpdateContext(container);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
needed = true;
}
return needed;
}
@Override
public boolean update(IUpdateContext context) {
StructureClass sc = (StructureClass) getBusinessObjectForPictogramElement(getDiagram());
ContainerShape scShape = DiagramUtil.findScShape(getDiagram());
IPositionProvider positionProvider = null;
if(context instanceof PositionUpdateContext)
positionProvider = ((PositionUpdateContext) context).getPositionProvider();
if(scShape == null)
scShape = createStructureClass(sc, positionProvider);
boolean doneChanges = updateConnections(getDiagram());
if (updateIfNeeded(getDiagram()))
doneChanges = true;
// structure class update
if(scShape != null){
IUpdateContext ctx;
if(positionProvider != null)
ctx = new PositionUpdateContext(scShape, positionProvider);
else
ctx = new UpdateContext(scShape);
doneChanges |= getFeatureProvider().updateIfPossible(ctx).toBoolean();
}
return doneChanges;
}
/**
* This just removes dangling connections (bindings and layer connections).
* New ones are added by the structure class support.
*
* @param diagram
* @return
*/
private boolean updateConnections(Diagram diagram) {
boolean doneChanges = false;
ArrayList<Connection> connections = new ArrayList<Connection>(diagram.getConnections());
for (Connection conn : connections) {
UpdateContext context = new DeleteContext(conn);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
if (updateFeature.update(context))
doneChanges = true;
}
return doneChanges;
}
/**
* @param diagram
* @return
*/
private boolean updateIfNeeded(ContainerShape container) {
boolean doneChanges = false;
// first recursion because ref ports might be needed for bindings
// we need to make a copy since children might be removed
ArrayList<Shape> children = new ArrayList<Shape>(container.getChildren());
for (Shape child : children) {
if (child instanceof ContainerShape)
if (updateIfNeeded((ContainerShape) child))
doneChanges = true;
}
// avoid infinite recursion by not entering with diagram again
if (!(container instanceof Diagram)) {
UpdateContext context = new DeleteContext(container);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
if (updateFeature.update(context))
doneChanges = true;
}
return doneChanges;
}
private ContainerShape createStructureClass(StructureClass sc, IPositionProvider positionProvider){
AddContext addContext = new AddContext();
addContext.setNewObject(sc);
addContext.setTargetContainer(getDiagram());
addContext.setX(StructureClassSupport.MARGIN);
addContext.setY(StructureClassSupport.MARGIN);
ContainerShape scShape = (ContainerShape) getFeatureProvider().addIfPossible(addContext);
if(positionProvider != null){
PosAndSize pos = positionProvider.getDiagramPosition();
GraphicsAlgorithm ga = scShape.getGraphicsAlgorithm();
if(pos != null){
ga.setX(pos.getX());
ga.setY(pos.getY());
if(pos.getW() > 0)
ga.setWidth(pos.getW());
if(pos.getH() > 0)
ga.setHeight(pos.getH());
}
}
return scShape;
}
}
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