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/*******************************************************************************
* Copyright (c) 2004, 2019 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.core.tools.runtime;
import java.util.ArrayList;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.preferences.IEclipsePreferences;
import org.eclipse.core.tools.CollapseAllAction;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.*;
import org.eclipse.ui.part.ViewPart;
import org.osgi.service.prefs.BackingStoreException;
public class EclipsePreferencesView extends ViewPart {
private TreeViewer viewer;
private IAction collapseAllAction;
class ViewContentProvider implements ITreeContentProvider {
private IEclipsePreferences invisibleRoot;
@Override
public void inputChanged(Viewer v, Object oldInput, Object newInput) {
// do nothing
}
@Override
public Object[] getElements(Object parent) {
if (parent.equals(getViewSite())) {
if (invisibleRoot == null)
invisibleRoot = Platform.getPreferencesService().getRootNode();
return new Object[] {invisibleRoot};
}
return getChildren(parent);
}
@Override
public void dispose() {
// do nothing
}
@Override
public Object getParent(Object child) {
if (child instanceof IEclipsePreferences)
return ((IEclipsePreferences) child).parent();
return null;
}
@Override
public Object[] getChildren(Object parent) {
ArrayList<Object> result = new ArrayList<>();
if (parent instanceof IEclipsePreferences) {
IEclipsePreferences node = (IEclipsePreferences) parent;
try {
String[] childrenNames = node.childrenNames();
for (int i = 0; childrenNames != null && i < childrenNames.length; i++)
result.add(node.node(childrenNames[i]));
String[] keys = node.keys();
for (String key : keys)
result.add(key + '=' + node.get(key, "")); //$NON-NLS-1$
} catch (BackingStoreException e) {
e.printStackTrace();
}
}
return result.toArray(new Object[result.size()]);
}
@Override
public boolean hasChildren(Object parent) {
if (parent instanceof IEclipsePreferences)
try {
IEclipsePreferences node = (IEclipsePreferences) parent;
return node.childrenNames().length != 0 || node.keys().length != 0;
} catch (BackingStoreException e) {
e.printStackTrace();
}
return false;
}
}
static class ViewLabelProvider extends LabelProvider {
@Override
public String getText(Object obj) {
String result = obj.toString();
if (obj instanceof IEclipsePreferences) {
IEclipsePreferences node = (IEclipsePreferences) obj;
result = node.name();
if (result.isEmpty())
result = "<root>"; //$NON-NLS-1$
}
return result;
}
@Override
public Image getImage(Object obj) {
String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
if (obj instanceof IEclipsePreferences)
imageKey = ISharedImages.IMG_OBJ_FOLDER;
return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
}
}
public EclipsePreferencesView() {
super();
}
@Override
public void createPartControl(Composite parent) {
viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL);
viewer.setContentProvider(new ViewContentProvider());
viewer.setLabelProvider(new ViewLabelProvider());
viewer.setComparator(new ViewerComparator());
viewer.setInput(getViewSite());
getViewSite().setSelectionProvider(viewer);
IActionBars bars = getViewSite().getActionBars();
collapseAllAction = new CollapseAllAction(viewer);
bars.getToolBarManager().add(collapseAllAction);
bars.updateActionBars();
}
@Override
public void dispose() {
super.dispose();
collapseAllAction = null;
}
@Override
public void setFocus() {
viewer.getControl().setFocus();
}
}
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