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package org.eclipse.etrice.ui.structure.support;
import java.util.ArrayList;
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.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.Diagram;
import org.eclipse.graphiti.mm.pictograms.Shape;
/**
* @author Henrik Rentz-Reichert - initial contribution and API
*
*/
public class AutoUpdateFeature extends AbstractUpdateFeature {
private static boolean lastDoneChanges;
/**
* @return the lastDoneChanges
*/
public static boolean isLastDoneChanges() {
return lastDoneChanges;
}
public AutoUpdateFeature(IFeatureProvider fp) {
super(fp);
lastDoneChanges = false;
}
@Override
public boolean canUpdate(IUpdateContext context) {
return true;
}
@Override
public IReason updateNeeded(IUpdateContext context) {
boolean needed = updateConnectionsNeeded(getDiagram());
if (updateNeeded(getDiagram()))
needed = true;
return new Reason(needed);
}
/**
* 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.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.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
needed = true;
}
return needed;
}
@Override
public boolean update(IUpdateContext context) {
boolean doneChanges = updateConnections(getDiagram());
if (updateIfNeeded(getDiagram()))
doneChanges = true;
lastDoneChanges = doneChanges;
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 UpdateContext(conn);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (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 UpdateContext(container);
IUpdateFeature updateFeature = getFeatureProvider().getUpdateFeature(context);
if (updateFeature.canUpdate(context))
if (updateFeature.updateNeeded(context).toBoolean())
if (updateFeature.update(context))
doneChanges = true;
}
return doneChanges;
}
}
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