/*******************************************************************************
* Copyright (c) 2006, 2014 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.tcf.te.ui.views.handler;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.eclipse.core.commands.operations.AbstractOperation;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.tcf.te.ui.views.internal.preferences.IPreferenceKeys;
import org.eclipse.tcf.te.ui.views.nls.Messages;
import org.eclipse.ui.navigator.CommonViewer;
import org.eclipse.ui.navigator.INavigatorContentDescriptor;
import org.eclipse.ui.navigator.INavigatorContentService;
/**
* Ensures that a given set of content extensions is <i>active</i> and a second
* non-intersecting set of content extensions are not <i>active</i>.
*
* <p>
* This operation is smart enough not to force any change if each id in each set
* is already in its desired action (<i>active</i> or <i>inactive</i>).
* <p>
* Copied and adapted from org.eclipse.ui.internal.navigator.filters.UpdateActiveExtensionsOperation
*/
public class UpdateActiveExtensionsOperation extends AbstractOperation {
private String[] contentExtensionsToActivate;
private final CommonViewer commonViewer;
private final INavigatorContentService contentService;
/**
* Create an operation to activate extensions and refresh the viewer.
*
* p> To use only one part of this operation (either "activate" or
* "deactivate", but not both), then supply <b>null</b> for the array action
* you are not concerned with.
* </p>
*
* @param aCommonViewer
* The CommonViewer instance to update
* @param theExtensionsToActivate
* An array of ids that correspond to the extensions that should
* be in the <i>active</i> action after this operation executes.
*/
public UpdateActiveExtensionsOperation(CommonViewer aCommonViewer, String[] theExtensionsToActivate) {
super(Messages.UpdateActiveExtensionsOperation_OperationName);
commonViewer = aCommonViewer;
contentService = commonViewer.getNavigatorContentService();
contentExtensionsToActivate = theExtensionsToActivate;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.core.commands.operations.AbstractOperation#execute(org.eclipse.core.runtime.IProgressMonitor,
* org.eclipse.core.runtime.IAdaptable)
*/
@Override
public IStatus execute(IProgressMonitor monitor, IAdaptable info) {
// we sort the array in order to use Array.binarySearch();
Arrays.sort(contentExtensionsToActivate);
IStructuredSelection ssel = null;
try {
commonViewer.getControl().setRedraw(false);
ISelection selection = commonViewer.getSelection();
if(selection instanceof IStructuredSelection)
ssel = (IStructuredSelection) selection;
INavigatorContentDescriptor[] visibleContentDescriptors = contentService
.getVisibleExtensions();
int indexofContentExtensionIdToBeActivated;
List<String> deltaList = new ArrayList<String>();
/* is there a delta? */
for (int i = 0; i < visibleContentDescriptors.length; i++) {
indexofContentExtensionIdToBeActivated = Arrays.binarySearch(
contentExtensionsToActivate,
visibleContentDescriptors[i].getId());
/*
* Either we have a filter that should be active that isn't XOR
* a filter that shouldn't be active that is currently
*/
if (indexofContentExtensionIdToBeActivated >= 0
^ contentService.isActive(visibleContentDescriptors[i]
.getId())) {
deltaList.add(visibleContentDescriptors[i].getId());
}
}
/* If so, update */
if (!deltaList.isEmpty()) {
contentService.getActivationService().activateExtensions(
contentExtensionsToActivate, true);
contentService.getActivationService()
.persistExtensionActivations();
Object[] expandedElements = commonViewer.getExpandedElements();
contentService.update();
commonViewer.refresh();
Object[] originalObjects = ssel.toArray();
commonViewer.setExpandedElements(expandedElements);
IStructuredSelection newSelection = new StructuredSelection(originalObjects);
commonViewer.setSelection(newSelection, true);
MRUList mru = new MRUList(IPreferenceKeys.PREF_CONTENT_MRU_LIST);
mru.updateMRUList(deltaList);
}
} finally {
commonViewer.getControl().setRedraw(true);
}
return Status.OK_STATUS;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.core.commands.operations.AbstractOperation#redo(org.eclipse.core.runtime.IProgressMonitor,
* org.eclipse.core.runtime.IAdaptable)
*/
@Override
public IStatus redo(IProgressMonitor monitor, IAdaptable info) {
return null;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.core.commands.operations.AbstractOperation#undo(org.eclipse.core.runtime.IProgressMonitor,
* org.eclipse.core.runtime.IAdaptable)
*/
@Override
public IStatus undo(IProgressMonitor monitor, IAdaptable info) {
return null;
}
}