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/*******************************************************************************
* Copyright (c) 2005, 2006 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
*******************************************************************************/
package org.eclipse.debug.internal.ui.viewers.update;
import org.eclipse.debug.core.model.IDebugElement;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.internal.ui.viewers.provisional.IModelSelectionPolicy;
import org.eclipse.debug.internal.ui.viewers.provisional.IPresentationContext;
import org.eclipse.debug.ui.IDebugUIConstants;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
/**
* Default selection policy for the debug view.
*
* @since 3.2
*/
public class DefaultSelectionPolicy implements IModelSelectionPolicy {
private IDebugElement fDebugElement;
/**
* Constructs a new selection policy for the given debug
* element.
*
* @param element
*/
public DefaultSelectionPolicy(IDebugElement element) {
fDebugElement = element;
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#contains(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext)
*/
public boolean contains(ISelection selection, IPresentationContext context) {
if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) {
if (selection instanceof IStructuredSelection) {
IStructuredSelection ss = (IStructuredSelection) selection;
Object element = ss.getFirstElement();
if (element instanceof IDebugElement) {
IDebugElement debugElement = (IDebugElement) element;
return fDebugElement.getDebugTarget().equals(debugElement.getDebugTarget());
}
}
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#overrides(org.eclipse.jface.viewers.ISelection, org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext)
*/
public boolean overrides(ISelection existing, ISelection candidate, IPresentationContext context) {
if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) {
if (existing instanceof IStructuredSelection && candidate instanceof IStructuredSelection) {
IStructuredSelection ssExisting = (IStructuredSelection) existing;
IStructuredSelection ssCandidate = (IStructuredSelection) candidate;
return overrides(ssExisting.getFirstElement(), ssCandidate.getFirstElement());
}
}
return true;
}
protected boolean overrides(Object existing, Object candidate) {
if (existing == null) {
return true;
}
if (existing.equals(candidate)) {
return true;
}
if (existing instanceof IStackFrame && candidate instanceof IStackFrame) {
IStackFrame curr = (IStackFrame) existing;
IStackFrame next = (IStackFrame) candidate;
return curr.getThread().equals(next.getThread()) || !isSticky(existing);
}
return !isSticky(existing);
}
/* (non-Javadoc)
* @see org.eclipse.debug.ui.viewers.IModelSelectionPolicy#isSticky(org.eclipse.jface.viewers.ISelection, org.eclipse.debug.ui.viewers.IPresentationContext)
*/
public boolean isSticky(ISelection selection, IPresentationContext context) {
if (IDebugUIConstants.ID_DEBUG_VIEW.equals(context.getId())) {
if (selection instanceof IStructuredSelection) {
return isSticky(((IStructuredSelection)selection).getFirstElement());
}
}
return false;
}
protected boolean isSticky(Object element) {
if (element instanceof IStackFrame) {
IStackFrame frame = (IStackFrame) element;
return frame.isSuspended();
}
return false;
}
}
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