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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:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
package org.eclipse.etrice.ui.behavior.support;
import java.util.ArrayList;
import org.eclipse.etrice.core.room.ActorClass;
import org.eclipse.etrice.core.room.StateGraph;
import org.eclipse.etrice.ui.behavior.commands.StateGraphContext;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.IReason;
import org.eclipse.graphiti.features.IRemoveFeature;
import org.eclipse.graphiti.features.IUpdateFeature;
import org.eclipse.graphiti.features.context.IRemoveContext;
import org.eclipse.graphiti.features.context.IUpdateContext;
import org.eclipse.graphiti.features.context.impl.RemoveContext;
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.pictograms.Connection;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Shape;
import org.eclipse.graphiti.platform.IDiagramEditor;
/**
* @author Henrik Rentz-Reichert (initial contribution)
*
*/
public class DiagramUpdateFeature extends AbstractUpdateFeature {
private ArrayList<Shape> usedShapes = new ArrayList<Shape>();
/**
* @param fp
*/
public DiagramUpdateFeature(IFeatureProvider fp) {
super(fp);
}
/* (non-Javadoc)
* @see org.eclipse.graphiti.func.IUpdate#canUpdate(org.eclipse.graphiti.features.context.IUpdateContext)
*/
@Override
public boolean canUpdate(IUpdateContext context) {
return true;
}
/* (non-Javadoc)
* @see org.eclipse.graphiti.func.IUpdate#updateNeeded(org.eclipse.graphiti.features.context.IUpdateContext)
*/
@Override
public IReason updateNeeded(IUpdateContext context) {
ActorClass ac = SupportUtil.getActorClass(getDiagram());
StateGraphContext tree = StateGraphContext.createContextTree(ac);
usedShapes.clear();
IReason needed = updateNeeded(tree);
if (needed.toBoolean())
return needed;
// check for unused state graph shapes
for (Shape sgshape : getDiagram().getChildren()) {
if (!usedShapes.contains(sgshape))
return Reason.createTrueReason();
if (sgshape instanceof ContainerShape) {
for (Shape child : ((ContainerShape) sgshape).getChildren()) {
if (child instanceof ContainerShape && !usedShapes.contains(child))
return Reason.createTrueReason();
}
}
}
// check for dangling connections or connections to update
for (Connection conn : getDiagram().getConnections()) {
if (conn.getStart()==null || conn.getEnd()==null)
return Reason.createTrueReason();
UpdateContext uf = new UpdateContext(conn);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(uf);
if (updateFeature!=null && updateFeature.canUpdate(uf)) {
IReason needUpdate = updateFeature.updateNeeded(uf);
if (needUpdate.toBoolean())
return needUpdate;
}
}
return Reason.createFalseReason();
}
/* (non-Javadoc)
* @see org.eclipse.graphiti.func.IUpdate#update(org.eclipse.graphiti.features.context.IUpdateContext)
*/
@Override
public boolean update(IUpdateContext context) {
ActorClass ac = SupportUtil.getActorClass(getDiagram());
StateGraphContext tree = StateGraphContext.createContextTree(ac);
usedShapes.clear();
boolean changed = update(tree);
// remove unused state graph shapes
ArrayList<Shape> children = new ArrayList<Shape>(getDiagram().getChildren());
for (Shape sgshape : children) {
if (!usedShapes.contains(sgshape)) {
IRemoveContext rc = new RemoveContext(sgshape);
IRemoveFeature removeFeature = getFeatureProvider().getRemoveFeature(rc);
if (removeFeature != null) {
removeFeature.remove(rc);
if (removeFeature.hasDoneChanges())
changed = true;
}
}
}
// remove dangling connections and update other ones
ArrayList<Connection> connections = new ArrayList<Connection>(getDiagram().getConnections());
for (Connection conn : connections) {
if (conn.getStart()==null || conn.getEnd()==null) {
IRemoveContext rc = new RemoveContext(conn);
IRemoveFeature removeFeature = getFeatureProvider().getRemoveFeature(rc);
if (removeFeature != null) {
removeFeature.remove(rc);
if (removeFeature.hasDoneChanges())
changed = true;
}
}
else {
UpdateContext uf = new UpdateContext(conn);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(uf);
if (updateFeature!=null && updateFeature.canUpdate(uf)) {
if (updateFeature.update(uf))
changed = true;
}
}
}
// if we inserted states they have been selected: reset the selection
IDiagramEditor diagramEditor = getFeatureProvider().getDiagramTypeProvider().getDiagramEditor();
if (diagramEditor != null)
diagramEditor.setPictogramElementForSelection(null);
return changed;
}
/**
* @param ctx
* @return
*/
private IReason updateNeeded(StateGraphContext ctx) {
StateGraph sg = ctx.getStateGraph();
ContainerShape cont = findStateGraphContainer(sg);
if (cont==null)
return Reason.createTrueReason("sub graph missing");
usedShapes.add(cont);
StateGraphUpdateContext context = new StateGraphUpdateContext(cont, ctx);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context)) {
IReason needUpdate = updateFeature.updateNeeded(context);
if (needUpdate.toBoolean())
return needUpdate;
}
for (Shape child : cont.getChildren()) {
UpdateContext uf = new UpdateContext(child);
updateFeature = getFeatureProvider().getUpdateFeature(uf);
if (updateFeature!=null && updateFeature.canUpdate(uf)) {
IReason needUpdate = updateFeature.updateNeeded(uf);
if (needUpdate.toBoolean())
return needUpdate;
}
}
// recursion
for (StateGraphContext child : ctx.getChildren()) {
IReason needUpdate = updateNeeded(child);
if (needUpdate.toBoolean())
return needUpdate;
}
return Reason.createFalseReason();
}
/**
* @param ctx
* @return
*/
private boolean update(StateGraphContext ctx) {
boolean changed = false;
StateGraph sg = ctx.getStateGraph();
ContainerShape cont = findStateGraphContainer(sg);
if (cont==null) {
// create
cont = SupportUtil.addStateGraph(ctx, getDiagram(), getFeatureProvider());
changed = true;
usedShapes.add(cont);
}
else {
// update
StateGraphUpdateContext context = new StateGraphUpdateContext(cont, ctx);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature!=null && updateFeature.canUpdate(context)) {
changed = updateFeature.update(context);
}
usedShapes.add(cont);
// need a copy since original list may be modified by removal of shapes
ArrayList<Shape> children = new ArrayList<Shape>(cont.getChildren());
for (Shape child : children) {
UpdateContext uf = new UpdateContext(child);
updateFeature = getFeatureProvider().getUpdateFeature(uf);
if (updateFeature!=null && updateFeature.canUpdate(uf)) {
changed = updateFeature.update(uf);
}
}
}
// recursion
for (StateGraphContext child : ctx.getChildren()) {
if (update(child))
changed = true;
}
return changed;
}
/**
* @param stateGraph
* @return
*/
private ContainerShape findStateGraphContainer(StateGraph sg) {
for (Shape child : getDiagram().getChildren()) {
Object bo = getBusinessObjectForPictogramElement(child);
if (bo==sg)
return (ContainerShape) child;
}
return null;
}
}
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