| /******************************************************************************* |
| * Copyright (c) 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.ui.internal.navigator.filters; |
| |
| import java.util.Arrays; |
| |
| 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.ui.internal.navigator.CommonNavigatorMessages; |
| 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 state (<i>active</i> or <i>inactive</i>). |
| * </p> |
| * |
| * @since 3.2 |
| * |
| */ |
| 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 state |
| * 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> state after this operation executes. |
| */ |
| public UpdateActiveExtensionsOperation(CommonViewer aCommonViewer, |
| String[] theExtensionsToActivate) { |
| super( |
| CommonNavigatorMessages.UpdateFiltersOperation_Update_CommonViewer_Filter_); |
| 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) |
| */ |
| public IStatus execute(IProgressMonitor monitor, IAdaptable info) { |
| |
| boolean updateExtensionActivation = false; |
| |
| // 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; |
| /* is there a delta? */ |
| for (int i = 0; i < visibleContentDescriptors.length |
| && !updateExtensionActivation; 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())) { |
| updateExtensionActivation = true; |
| } |
| } |
| |
| /* If so, update */ |
| if (updateExtensionActivation) { |
| |
| 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); |
| } |
| |
| } 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) |
| */ |
| 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) |
| */ |
| public IStatus undo(IProgressMonitor monitor, IAdaptable info) { |
| return null; |
| } |
| } |