| /******************************************************************************* |
| * Copyright (c) 2000, 2015 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.ui.refactoring; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| import org.eclipse.core.resources.IFile; |
| |
| import org.eclipse.jface.resource.ImageDescriptor; |
| |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.MultiStateTextFileChange; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChange; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChangeGroup; |
| import org.eclipse.ltk.core.refactoring.TextFileChange; |
| import org.eclipse.ltk.internal.ui.refactoring.BasicElementLabels; |
| import org.eclipse.ltk.internal.ui.refactoring.InternalTextEditChangeNode; |
| import org.eclipse.ltk.internal.ui.refactoring.Messages; |
| import org.eclipse.ltk.internal.ui.refactoring.PreviewNode; |
| import org.eclipse.ltk.internal.ui.refactoring.RefactoringPluginImages; |
| import org.eclipse.ltk.internal.ui.refactoring.RefactoringUIMessages; |
| import org.eclipse.ltk.internal.ui.refactoring.TextEditGroupNode; |
| |
| /** |
| * A special preview node to represent <code>TextEditBasedChange</code>s in the |
| * preview tree. |
| * <p> |
| * This class should be subclassed by clients wishing to provide language |
| * aware substructures for special <code>TextEditBasedChange</code>s. The preview |
| * infrastructure accesses to preview node for a <code>TextEditBasedChange</code> |
| * by asking the change for an adapter of type <code>TextEditChangeNode</code>. |
| * If no adapter is returned, this default implementation will be used to present |
| * <code>TextEditBasedChange</code> in the preview tree. |
| * </p> |
| * @since 3.2 |
| */ |
| public class TextEditChangeNode extends InternalTextEditChangeNode { |
| |
| public static abstract class ChildNode extends PreviewNode { |
| protected ChildNode(PreviewNode parent) { |
| super(parent); |
| } |
| protected TextEditChangeNode getTextEditChangeNode() { |
| return internalGetTextEditChangeNode(this); |
| } |
| } |
| |
| /** |
| * Creates a new child node for the given parent and change group. |
| * |
| * @param parent the parent of the new child node |
| * @param changeGroup the <code>TextEditBasedChangeGroup</code> this child node |
| * represents in the preview tree |
| * |
| * @return the new child node |
| */ |
| public static ChildNode createTextEditGroupNode(ChildNode parent, TextEditBasedChangeGroup changeGroup) { |
| return new TextEditGroupNode(parent, changeGroup); |
| } |
| |
| /** |
| * Creates a new child node for the given parent and change group. |
| * |
| * @param parent the parent of the new child node |
| * @param changeGroup the <code>TextEditBasedChangeGroup</code> this child node |
| * represents in the preview tree |
| * |
| * @return the new child node |
| */ |
| public static ChildNode createTextEditGroupNode(TextEditChangeNode parent, TextEditBasedChangeGroup changeGroup) { |
| return new TextEditGroupNode(parent, changeGroup); |
| } |
| |
| /** |
| * Creates a new text edit change node for the given change. |
| * |
| * @param change the <code>TextEditBasedChange</code> this node |
| * represents in the preview tree |
| */ |
| public TextEditChangeNode(TextEditBasedChange change) { |
| // the parent will be set lazily via the initialize method |
| super(null, change); |
| } |
| |
| /** |
| * Returns the <code>TextEditBasedChange</code> this node is |
| * associated with. |
| * |
| * @return the <code>TextEditBasedChange</code> |
| */ |
| @Override |
| public final TextEditBasedChange getTextEditBasedChange() { |
| return super.getTextEditBasedChange(); |
| } |
| |
| /** |
| * Returns the text used to render this node in the |
| * UI. |
| * |
| * @return a human readable representation of this node |
| */ |
| @Override |
| public String getText() { |
| Change change= getTextEditBasedChange(); |
| if (change instanceof TextFileChange) { |
| IFile file= ((TextFileChange)change).getFile(); |
| return Messages.format( |
| RefactoringUIMessages.PreviewWizardPage_changeElementLabelProvider_textFormat, |
| new String[] { BasicElementLabels.getResourceName(file), BasicElementLabels.getPathLabel(file.getParent().getFullPath(), false)}); |
| } |
| return super.getText(); |
| } |
| |
| /** |
| * Returns the image descriptor used to render this node |
| * in the UI. |
| * |
| * @return the image descriptor representing this node |
| */ |
| @Override |
| public ImageDescriptor getImageDescriptor() { |
| return RefactoringPluginImages.DESC_OBJS_FILE_CHANGE; |
| } |
| |
| @Override |
| protected ChildNode[] createChildNodes() { |
| TextEditBasedChange change= getTextEditBasedChange(); |
| if (change instanceof MultiStateTextFileChange) { |
| return new ChildNode[0]; // no edit preview & edit disabling possible in the MultiStateTextFileChange (edits must be applied in sequence) |
| } |
| TextEditBasedChangeGroup[] groups= getSortedChangeGroups(change); |
| ChildNode[] result= new ChildNode[groups.length]; |
| for (int i= 0; i < groups.length; i++) { |
| result[i]= new TextEditGroupNode(this, groups[i]); |
| } |
| return result; |
| } |
| |
| private static class OffsetComparator implements Comparator<TextEditBasedChangeGroup> { |
| @Override |
| public int compare(TextEditBasedChangeGroup c1, TextEditBasedChangeGroup c2) { |
| int p1= getOffset(c1); |
| int p2= getOffset(c2); |
| if (p1 < p2) |
| return -1; |
| if (p1 > p2) |
| return 1; |
| // same offset |
| return 0; |
| } |
| private int getOffset(TextEditBasedChangeGroup edit) { |
| return edit.getRegion().getOffset(); |
| } |
| } |
| |
| private TextEditBasedChangeGroup[] getSortedChangeGroups(TextEditBasedChange change) { |
| TextEditBasedChangeGroup[] groups= change.getChangeGroups(); |
| List<TextEditBasedChangeGroup> result= new ArrayList<>(groups.length); |
| for (TextEditBasedChangeGroup group : groups) { |
| if (!group.getTextEditGroup().isEmpty()) { |
| result.add(group); |
| } |
| } |
| Comparator<TextEditBasedChangeGroup> comparator= new OffsetComparator(); |
| Collections.sort(result, comparator); |
| return result.toArray(new TextEditBasedChangeGroup[result.size()]); |
| } |
| |
| |
| } |