/*******************************************************************************
* Copyright (c) 2008, 2009 Wind River Systems 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.dsf.debug.ui.viewmodel.expression;
import org.eclipse.cdt.dsf.ui.viewmodel.update.IElementUpdateTester;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.jface.viewers.TreePath;
class ExpressionsChangedUpdateTester implements IElementUpdateTester {
private final ExpressionsChangedEvent fEvent;
public ExpressionsChangedUpdateTester(ExpressionsChangedEvent event) {
fEvent = event;
}
public int getUpdateFlags(Object viewerInput, TreePath path) {
// Check whether the element in the cache matches the expression manager element.
Object element = path.getSegmentCount() == 0 ? viewerInput : path.getLastSegment();
if (fEvent.getExpressionManagerElements().contains(element)) {
return ExpressionsManualUpdatePolicy.FLUSH;
}
// If the expressions were modified, flush the entries which are under the
// given expression. To do that, check whether the element path contains one
// of the changed expressions.
if (fEvent.getType().equals(ExpressionsChangedEvent.Type.CHANGED)) {
for (int i = 0; i < path.getSegmentCount(); i++) {
if (eventContainsElement(path.getSegment(i))) {
return ExpressionsManualUpdatePolicy.FLUSH;
}
}
}
return 0;
}
private boolean eventContainsElement(Object element) {
if (element instanceof IAdaptable) {
IExpression expression = (IExpression)((IAdaptable)element).getAdapter(IExpression.class);
if (expression != null) {
for (int i = 0; i < fEvent.getExpressions().length; i++) {
if (expression.equals(fEvent.getExpressions()[i])) {
return true;
}
}
}
}
return false;
}
public boolean includes(IElementUpdateTester tester) {
return tester instanceof ExpressionsChangedUpdateTester;
}
@Override
public String toString() {
return "(" + fEvent + ") update tester"; //$NON-NLS-1$ //$NON-NLS-2$
}
}