| /******************************************************************************* |
| * Copyright (c) 2005, 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.wst.xsd.ui.internal.refactor.util; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.ltk.core.refactoring.TextChange; |
| import org.eclipse.text.edits.MultiTextEdit; |
| import org.eclipse.text.edits.TextEdit; |
| import org.eclipse.text.edits.TextEditGroup; |
| |
| /** |
| * A utility class to provide compatibility with the old |
| * text change API of adding text edits directly and auto |
| * inserting them into the tree. |
| */ |
| public class TextChangeCompatibility { |
| |
| public static void addTextEdit(TextChange change, String name, TextEdit edit) { |
| Assert.isNotNull(change); |
| Assert.isNotNull(name); |
| Assert.isNotNull(edit); |
| TextEdit root= change.getEdit(); |
| if (root == null) { |
| root= new MultiTextEdit(); |
| change.setEdit(root); |
| } |
| insert(root, edit); |
| change.addTextEditGroup(new TextEditGroup(name, edit)); |
| } |
| |
| public static void addTextEdit(TextChange change, String name, TextEdit[] edits) { |
| Assert.isNotNull(change); |
| Assert.isNotNull(name); |
| Assert.isNotNull(edits); |
| TextEdit root= change.getEdit(); |
| if (root == null) { |
| root= new MultiTextEdit(); |
| change.setEdit(root); |
| } |
| for (int i= 0; i < edits.length; i++) { |
| insert(root, edits[i]); |
| } |
| change.addTextEditGroup(new TextEditGroup(name, edits)); |
| } |
| |
| public static void insert(TextEdit parent, TextEdit edit) { |
| if (!parent.hasChildren()) { |
| parent.addChild(edit); |
| return; |
| } |
| TextEdit[] children= parent.getChildren(); |
| // First dive down to find the right parent. |
| for (int i= 0; i < children.length; i++) { |
| TextEdit child= children[i]; |
| if (covers(child, edit)) { |
| insert(child, edit); |
| return; |
| } |
| } |
| // We have the right parent. Now check if some of the children have to |
| // be moved under the new edit since it is covering it. |
| for (int i= children.length - 1; i >= 0; i--) { |
| TextEdit child= children[i]; |
| if (covers(edit, child)) { |
| parent.removeChild(i); |
| edit.addChild(child); |
| } |
| } |
| parent.addChild(edit); |
| } |
| |
| private static boolean covers(TextEdit thisEdit, TextEdit otherEdit) { |
| if (thisEdit.getLength() == 0) // an insertion point can't cover anything |
| return false; |
| |
| int thisOffset= thisEdit.getOffset(); |
| int thisEnd= thisEdit.getExclusiveEnd(); |
| if (otherEdit.getLength() == 0) { |
| int otherOffset= otherEdit.getOffset(); |
| return thisOffset < otherOffset && otherOffset < thisEnd; |
| } else { |
| int otherOffset= otherEdit.getOffset(); |
| int otherEnd= otherEdit.getExclusiveEnd(); |
| return thisOffset <= otherOffset && otherEnd <= thisEnd; |
| } |
| } |
| |
| } |