| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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.ltk.internal.ui.refactoring; |
| |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IAdaptable; |
| |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.jface.resource.ImageDescriptor; |
| |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.CompositeChange; |
| import org.eclipse.ltk.core.refactoring.GroupCategory; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChange; |
| import org.eclipse.ltk.ui.refactoring.ChangePreviewViewerInput; |
| import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer; |
| import org.eclipse.ltk.ui.refactoring.TextEditChangeNode; |
| |
| public abstract class AbstractChangeNode extends PreviewNode { |
| |
| private final Change fChange; |
| private PreviewNode[] fChildren; |
| |
| public static PreviewNode createNode(PreviewNode parent, RefactoringPreviewChangeFilter filter, Change change) { |
| if (change instanceof CompositeChange) { |
| return new CompositeChangeNode(parent, filter, (CompositeChange)change); |
| } else if (change instanceof TextEditBasedChange) { |
| InternalTextEditChangeNode result= change.getAdapter(TextEditChangeNode.class); |
| if (result == null) { |
| result= new TextEditChangeNode((TextEditBasedChange)change); |
| } |
| result.initialize(parent); |
| return result; |
| } |
| return new DefaultChangeNode(parent, change); |
| } |
| |
| public static PreviewNode createNode(PreviewNode parent, Change change) { |
| return createNode(parent, null, change); |
| } |
| |
| /** |
| * Creates a new <code>AbstractChangeNode</code> for the given |
| * change. |
| * |
| * @param parent the change nodes's parent or <code>null |
| * </code> if the change node doesn't have a parent |
| * @param change the actual change. Argument must not be |
| * <code>null</code> |
| */ |
| AbstractChangeNode(PreviewNode parent, Change change) { |
| super(parent); |
| Assert.isNotNull(change); |
| fChange= change; |
| } |
| |
| /** |
| * Returns the underlying <code>Change</code> object. |
| * |
| * @return the underlying change |
| */ |
| Change getChange() { |
| return fChange; |
| } |
| |
| @Override |
| PreviewNode[] getChildren() { |
| if (fChildren == null) { |
| fChildren= doCreateChildren(); |
| } |
| return fChildren; |
| } |
| |
| abstract PreviewNode[] doCreateChildren(); |
| |
| @Override |
| public String getText() { |
| return fChange.getName(); |
| } |
| |
| @Override |
| public ImageDescriptor getImageDescriptor() { |
| return RefactoringPluginImages.DESC_OBJS_DEFAULT_CHANGE; |
| } |
| |
| @Override |
| ChangePreviewViewerDescriptor getChangePreviewViewerDescriptor() throws CoreException { |
| return ChangePreviewViewerDescriptor.get(fChange); |
| } |
| |
| @Override |
| void feedInput(IChangePreviewViewer viewer, List<GroupCategory> categories) throws CoreException { |
| viewer.setInput(new ChangePreviewViewerInput(fChange)); |
| } |
| |
| @Override |
| void setEnabled(boolean enabled) { |
| fChange.setEnabled(enabled); |
| } |
| |
| @Override |
| void setEnabledShallow(boolean enabled) { |
| fChange.setEnabledShallow(enabled); |
| } |
| |
| @Override |
| boolean hasOneGroupCategory(List<GroupCategory> categories) { |
| for (PreviewNode child : getChildren()) { |
| if (child.hasOneGroupCategory(categories)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| boolean hasDerived() { |
| if (hasDerivedResourceChange(fChange)) |
| return true; |
| for (PreviewNode child : getChildren()) { |
| if (child.hasDerived()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| int getDefaultChangeActive() { |
| int result= fChange.isEnabled() ? ACTIVE : INACTIVE; |
| if (fChildren != null) { |
| for (PreviewNode child : fChildren) { |
| result= ACTIVATION_TABLE[child.getActive()][result]; |
| if (result == PARTLY_ACTIVE) |
| break; |
| } |
| } |
| return result; |
| } |
| |
| int getCompositeChangeActive() { |
| if (fChildren != null && fChildren.length > 0) { |
| int result= fChildren[0].getActive(); |
| for (int i= 1; i < fChildren.length; i++) { |
| result= ACTIVATION_TABLE[fChildren[i].getActive()][result]; |
| if (result == PARTLY_ACTIVE) |
| break; |
| } |
| return result; |
| } else { |
| return fChange.isEnabled() ? ACTIVE : INACTIVE; |
| } |
| } |
| |
| /** |
| * Returns <code>true</code> iff the change node contains a derived |
| * resource. |
| * |
| * @param change the change |
| * @return whether the change contains a derived resource |
| */ |
| static boolean hasDerivedResourceChange(Change change) { |
| Object modifiedElement= change.getModifiedElement(); |
| if (modifiedElement instanceof IResource) { |
| return ((IResource) modifiedElement).isDerived(IResource.CHECK_ANCESTORS); |
| } else if (modifiedElement instanceof IAdaptable) { |
| IAdaptable adaptable= (IAdaptable) modifiedElement; |
| IResource resource= adaptable.getAdapter(IResource.class); |
| if (resource != null) { |
| return resource.isDerived(IResource.CHECK_ANCESTORS); |
| } |
| } |
| return false; |
| } |
| } |