| /******************************************************************************* |
| * Copyright (c) 2003, 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.dialogs; |
| |
| import java.util.ArrayList; |
| |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.model.AdaptableList; |
| |
| /** |
| * Provider used by the NewWizardNewPage. |
| * |
| * @since 3.0 |
| */ |
| public class WizardContentProvider implements ITreeContentProvider { |
| |
| private AdaptableList input; |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#dispose() |
| */ |
| public void dispose() { |
| input = null; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object) |
| */ |
| public Object[] getChildren(Object parentElement) { |
| if (parentElement instanceof WizardCollectionElement) { |
| ArrayList list = new ArrayList(); |
| WizardCollectionElement element = (WizardCollectionElement) parentElement; |
| |
| Object[] childCollections = element.getChildren(); |
| for (int i = 0; i < childCollections.length; i++) { |
| handleChild(childCollections[i], list); |
| } |
| |
| Object[] childWizards = element.getWizards(); |
| for (int i = 0; i < childWizards.length; i++) { |
| handleChild(childWizards[i], list); |
| } |
| |
| // flatten lists with only one category |
| if (list.size() == 1 |
| && list.get(0) instanceof WizardCollectionElement) { |
| return getChildren(list.get(0)); |
| } |
| |
| return list.toArray(); |
| } else if (parentElement instanceof AdaptableList) { |
| AdaptableList aList = (AdaptableList) parentElement; |
| Object[] children = aList.getChildren(); |
| ArrayList list = new ArrayList(children.length); |
| for (int i = 0; i < children.length; i++) { |
| handleChild(children[i], list); |
| } |
| // if there is only one category, return it's children directly (flatten list) |
| if (list.size() == 1 |
| && list.get(0) instanceof WizardCollectionElement) { |
| return getChildren(list.get(0)); |
| } |
| |
| return list.toArray(); |
| } else { |
| return new Object[0]; |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) |
| */ |
| public Object[] getElements(Object inputElement) { |
| return getChildren(inputElement); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object) |
| */ |
| public Object getParent(Object element) { |
| if (element instanceof WizardCollectionElement) { |
| Object[] children = input.getChildren(); |
| for (int i = 0; i < children.length; i++) { |
| if (children[i].equals(element)) { |
| return input; |
| } |
| } |
| return ((WizardCollectionElement) element).getParent(element); |
| } |
| return null; |
| } |
| |
| /** |
| * Adds the item to the list, unless it's a collection element without any children. |
| * |
| * @param element the element to test and add |
| * @param list the <code>Collection</code> to add to. |
| * @since 3.0 |
| */ |
| private void handleChild(Object element, ArrayList list) { |
| if (element instanceof WizardCollectionElement) { |
| if (hasChildren(element)) { |
| list.add(element); |
| } |
| } else { |
| list.add(element); |
| } |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object) |
| */ |
| public boolean hasChildren(Object element) { |
| if (element instanceof WizardCollectionElement) { |
| if (getChildren(element).length > 0) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, |
| * java.lang.Object, java.lang.Object) |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| input = (AdaptableList) newInput; |
| } |
| } |