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/*******************************************************************************
* Copyright (c) 2005, 2012 IBM Corporation 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:
* IBM Corporation - initial API and implementation
* Wind Rvier Systems - added support for columns (bug 235646)
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.update;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.IExpressionManager;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.debug.internal.core.IExpressionsListener2;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.ModelDelta;
import org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.Viewer;
/**
* Model proxy that fires model delta updates for the ExpressionManager.
*
* @see org.eclipse.debug.internal.core.ExpressionManager
*/
public class ExpressionManagerModelProxy extends AbstractModelProxy implements IExpressionsListener2, IPropertyChangeListener {
@Override
public void init(IPresentationContext context) {
super.init(context);
getExpressionManager().addExpressionListener(this);
context.addPropertyChangeListener(this);
}
@Override
public void installed(Viewer viewer) {
updateExpressions(getExpressionManager().getExpressions(), IModelDelta.INSTALL);
}
/**
* @return the default expression manager from the debug plugin
*/
protected IExpressionManager getExpressionManager() {
return DebugPlugin.getDefault().getExpressionManager();
}
@Override
public synchronized void dispose() {
getPresentationContext().removePropertyChangeListener(this);
super.dispose();
getExpressionManager().removeExpressionListener(this);
}
@Override
public void expressionsMoved(IExpression[] expressions, int index){
int count = getElementsCount();
ModelDelta delta = new ModelDelta(getExpressionManager(), -1, IModelDelta.NO_CHANGE, count);
for (IExpression expression : expressions) {
delta.addNode(expression, IModelDelta.REMOVED);
}
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED, -1);
}
fireModelChanged(delta);
}
@Override
public void expressionsInserted(IExpression[] expressions, int index){
int count = getElementsCount();
ModelDelta delta = new ModelDelta(getExpressionManager(), -1, IModelDelta.NO_CHANGE, count);
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED | IModelDelta.INSTALL, -1);
}
fireModelChanged(delta);
}
@Override
public void expressionsAdded(IExpression[] expressions) {
int index = getExpressionManager().getExpressions().length - expressions.length;
int count = getElementsCount();
ModelDelta delta = new ModelDelta(getExpressionManager(), -1, IModelDelta.NO_CHANGE, count);
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED | IModelDelta.INSTALL, -1);
}
fireModelChanged(delta);
}
@Override
public void expressionsRemoved(IExpression[] expressions) {
updateExpressions(expressions, IModelDelta.REMOVED | IModelDelta.UNINSTALL);
}
@Override
public void expressionsChanged(IExpression[] expressions) {
updateExpressions(expressions, IModelDelta.CONTENT | IModelDelta.STATE);
}
private void updateExpressions(IExpression[] expressions, int flags) {
ModelDelta delta = new ModelDelta(getExpressionManager(), IModelDelta.NO_CHANGE);
for (IExpression expression : expressions) {
delta.addNode(expression, flags);
}
fireModelChanged(delta);
}
private int getElementsCount() {
// Account for the "Add new expression" element only if columns are
// displayed.
return getExpressionManager().getExpressions().length +
(getPresentationContext().getColumns() != null ? 1 : 0);
}
@Override
public void propertyChange(PropertyChangeEvent event) {
// If columns are turned on/off, refresh the view to account for the
// "Add new expression" element.
if (IPresentationContext.PROPERTY_COLUMNS.equals(event.getProperty())) {
fireModelChanged(new ModelDelta(getExpressionManager(), IModelDelta.CONTENT));
}
}
}
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