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/*******************************************************************************
* Copyright (c) 2006, 2007 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
*******************************************************************************/
package org.eclipse.debug.internal.ui.model.elements;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.model.IStackFrame;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
import org.eclipse.debug.ui.IDebugUIConstants;
/**
* @since 3.3
*/
public class StackFrameContentProvider extends ElementContentProvider {
@Override
protected int getChildCount(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
return getAllChildren(element, context, monitor).length;
}
@Override
protected Object[] getChildren(Object parent, int index, int length, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
return getElements(getAllChildren(parent, context, monitor), index, length);
}
/**
* This method retrieves all of the children for the specified parent given the current context
* @param parent the parent ot get the children for
* @param context the context for which to get the children for
* @param monitor the monitor for progress
* @return the collection of children, or an empty collection, never <code>null</code>
* @throws CoreException
*/
protected Object[] getAllChildren(Object parent, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
if (parent instanceof IStackFrame) {
String id = context.getId();
IStackFrame frame = (IStackFrame) parent;
if (id.equals(IDebugUIConstants.ID_VARIABLE_VIEW)) {
return frame.getVariables();
} else if (id.equals(IDebugUIConstants.ID_REGISTER_VIEW)) {
return frame.getRegisterGroups();
}
} else {
monitor.cancel();
}
return EMPTY;
}
@Override
protected boolean supportsContextId(String id) {
return id.equals(IDebugUIConstants.ID_VARIABLE_VIEW) || id.equals(IDebugUIConstants.ID_REGISTER_VIEW);
}
@Override
protected boolean hasChildren(Object element, IPresentationContext context, IViewerUpdate monitor) throws CoreException {
String id = context.getId();
IStackFrame frame = (IStackFrame) element;
if (id.equals(IDebugUIConstants.ID_VARIABLE_VIEW)) {
return frame.hasVariables();
} else if (id.equals(IDebugUIConstants.ID_REGISTER_VIEW)) {
return frame.hasRegisterGroups();
}
return false;
}
}
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