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/*******************************************************************************
* Copyright (c) 2005, 2010 IBM Corporation 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:
* 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 {
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#init(org.eclipse.debug.internal.ui.viewers.IPresentationContext)
*/
public void init(IPresentationContext context) {
super.init(context);
getExpressionManager().addExpressionListener(this);
context.addPropertyChangeListener(this);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy#installed(org.eclipse.jface.viewers.Viewer)
*/
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();
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.ui.viewers.update.EventHandlerModelProxy#dispose()
*/
public synchronized void dispose() {
getPresentationContext().removePropertyChangeListener(this);
super.dispose();
getExpressionManager().removeExpressionListener(this);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.IExpressionsListener2#expressionsMoved(org.eclipse.debug.core.model.IExpression[], int)
*/
public void expressionsMoved(IExpression[] expressions, int index){
ModelDelta delta = new ModelDelta(getExpressionManager(), IModelDelta.NO_CHANGE);
int count = getElementsCount();
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, IModelDelta.REMOVED);
}
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED, count);
}
fireModelChanged(delta);
}
/* (non-Javadoc)
* @see org.eclipse.debug.internal.core.IExpressionsListener2#expressionsInserted(org.eclipse.debug.core.model.IExpression[], int)
*/
public void expressionsInserted(IExpression[] expressions, int index){
int count = getElementsCount();
ModelDelta delta = new ModelDelta(getExpressionManager(), IModelDelta.NO_CHANGE);
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED | IModelDelta.INSTALL, count);
}
fireModelChanged(delta);
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.IExpressionsListener#expressionsAdded(org.eclipse.debug.core.model.IExpression[])
*/
public void expressionsAdded(IExpression[] expressions) {
int index = getExpressionManager().getExpressions().length - expressions.length;
int count = getElementsCount();
ModelDelta delta = new ModelDelta(getExpressionManager(), IModelDelta.NO_CHANGE);
for (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
delta.addNode(expression, index+i, IModelDelta.ADDED | IModelDelta.INSTALL, count);
}
fireModelChanged(delta);
updateExpressions(expressions, IModelDelta.ADDED | IModelDelta.INSTALL);
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.IExpressionsListener#expressionsRemoved(org.eclipse.debug.core.model.IExpression[])
*/
public void expressionsRemoved(IExpression[] expressions) {
updateExpressions(expressions, IModelDelta.REMOVED | IModelDelta.UNINSTALL);
}
/* (non-Javadoc)
* @see org.eclipse.debug.core.IExpressionsListener#expressionsChanged(org.eclipse.debug.core.model.IExpression[])
*/
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 (int i = 0; i < expressions.length; i++) {
IExpression expression = expressions[i];
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);
}
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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