| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.views.navigator; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.IExtension; |
| import org.eclipse.core.runtime.IExtensionPoint; |
| import org.eclipse.jface.viewers.IStructuredContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin; |
| import org.eclipse.ui.plugin.AbstractUIPlugin; |
| |
| /** |
| * The FiltersContentProvider provides the elements for use by the list dialog |
| * for selecting the patterns to apply. |
| */ |
| /* package */class FiltersContentProvider implements |
| IStructuredContentProvider { |
| |
| private static List definedFilters; |
| |
| private static List defaultFilters; |
| |
| private ResourcePatternFilter resourceFilter; |
| |
| /** |
| * Create a FiltersContentProvider using the selections from the suppliec |
| * resource filter. |
| */ |
| public FiltersContentProvider(ResourcePatternFilter filter) { |
| this.resourceFilter = filter; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IContentProvider. |
| */ |
| public void dispose() { |
| } |
| |
| /** |
| * Returns the filters which are enabled by default. |
| * |
| * @return a list of strings |
| */ |
| public static List getDefaultFilters() { |
| if (defaultFilters == null) { |
| readFilters(); |
| } |
| return defaultFilters; |
| } |
| |
| /** |
| * Returns the filters currently defined for the navigator. |
| * |
| * @return a list of strings |
| */ |
| public static List getDefinedFilters() { |
| if (definedFilters == null) { |
| readFilters(); |
| } |
| return definedFilters; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IStructuredContentProvider. |
| */ |
| public Object[] getElements(Object inputElement) { |
| return getDefinedFilters().toArray(); |
| } |
| |
| /** |
| * Return the initially selected elements. |
| */ |
| public String[] getInitialSelections() { |
| return this.resourceFilter.getPatterns(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IContentProvider. |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| } |
| |
| /** |
| * Reads the filters currently defined for the workbench. |
| */ |
| private static void readFilters() { |
| definedFilters = new ArrayList(); |
| defaultFilters = new ArrayList(); |
| AbstractUIPlugin plugin = IDEWorkbenchPlugin.getDefault(); |
| if (plugin != null) { |
| IExtensionPoint extension = plugin.getDescriptor() |
| .getExtensionPoint(ResourcePatternFilter.FILTERS_TAG); |
| if (extension != null) { |
| IExtension[] extensions = extension.getExtensions(); |
| for (int i = 0; i < extensions.length; i++) { |
| IConfigurationElement[] configElements = extensions[i] |
| .getConfigurationElements(); |
| for (int j = 0; j < configElements.length; j++) { |
| String pattern = configElements[j] |
| .getAttribute("pattern");//$NON-NLS-1$ |
| if (pattern != null) { |
| definedFilters.add(pattern); |
| } |
| String selected = configElements[j] |
| .getAttribute("selected");//$NON-NLS-1$ |
| if (selected != null |
| && selected.equalsIgnoreCase("true")) { //$NON-NLS-1$ |
| defaultFilters.add(pattern); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |