| /******************************************************************************* |
| * 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.jdt.internal.ui.refactoring; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.eclipse.text.edits.TextEdit; |
| |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.Region; |
| |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChange; |
| import org.eclipse.ltk.core.refactoring.TextEditBasedChangeGroup; |
| |
| import org.eclipse.ltk.internal.ui.refactoring.TextEditChangeElement; |
| import org.eclipse.ltk.internal.ui.refactoring.ChangeElement; |
| import org.eclipse.ltk.internal.ui.refactoring.DefaultChangeElement; |
| import org.eclipse.ltk.internal.ui.refactoring.IChangeElementChildrenCreator; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.ISourceReference; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| public class CompilationUnitChangeChildrenCreator implements IChangeElementChildrenCreator { |
| |
| private static class OffsetComparator implements Comparator { |
| public int compare(Object o1, Object o2) { |
| TextEditBasedChangeGroup c1= (TextEditBasedChangeGroup)o1; |
| TextEditBasedChangeGroup c2= (TextEditBasedChangeGroup)o2; |
| 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(); |
| } |
| } |
| |
| public void createChildren(DefaultChangeElement changeElement) { |
| final TextEditBasedChange change= (TextEditBasedChange) changeElement.getChange(); |
| ICompilationUnit cunit= (ICompilationUnit) change.getAdapter(ICompilationUnit.class); |
| if (cunit != null) { |
| List children= new ArrayList(5); |
| Map map= new HashMap(20); |
| TextEditBasedChangeGroup[] changes= getSortedChangeGroups(change); |
| for (int i= 0; i < changes.length; i++) { |
| TextEditBasedChangeGroup tec= changes[i]; |
| try { |
| IJavaElement element= getModifiedJavaElement(tec, cunit); |
| if (element.equals(cunit)) { |
| children.add(new TextEditChangeElement(changeElement, tec)); |
| } else { |
| PseudoJavaChangeElement pjce= getChangeElement(map, element, children, changeElement); |
| pjce.addChild(new TextEditChangeElement(pjce, tec)); |
| } |
| } catch (JavaModelException e) { |
| children.add(new TextEditChangeElement(changeElement, tec)); |
| } |
| } |
| changeElement.setChildren((ChangeElement[]) children.toArray(new ChangeElement[children.size()])); |
| } |
| } |
| |
| private TextEditBasedChangeGroup[] getSortedChangeGroups(TextEditBasedChange change) { |
| TextEditBasedChangeGroup[] edits= change.getChangeGroups(); |
| List result= new ArrayList(edits.length); |
| for (int i= 0; i < edits.length; i++) { |
| if (!edits[i].getTextEditGroup().isEmpty()) |
| result.add(edits[i]); |
| } |
| Comparator comparator= new OffsetComparator(); |
| Collections.sort(result, comparator); |
| return (TextEditBasedChangeGroup[])result.toArray(new TextEditBasedChangeGroup[result.size()]); |
| } |
| |
| private IJavaElement getModifiedJavaElement(TextEditBasedChangeGroup edit, ICompilationUnit cunit) throws JavaModelException { |
| IRegion range= edit.getRegion(); |
| if (range.getOffset() == 0 && range.getLength() == 0) |
| return cunit; |
| IJavaElement result= cunit.getElementAt(range.getOffset()); |
| if (result == null) |
| return cunit; |
| |
| try { |
| while(true) { |
| ISourceReference ref= (ISourceReference)result; |
| IRegion sRange= new Region(ref.getSourceRange().getOffset(), ref.getSourceRange().getLength()); |
| if (result.getElementType() == IJavaElement.COMPILATION_UNIT || result.getParent() == null || coveredBy(edit, sRange)) |
| break; |
| result= result.getParent(); |
| } |
| } catch(JavaModelException e) { |
| // Do nothing, use old value. |
| } catch(ClassCastException e) { |
| // Do nothing, use old value. |
| } |
| return result; |
| } |
| |
| private PseudoJavaChangeElement getChangeElement(Map map, IJavaElement element, List children, ChangeElement cunitChange) { |
| PseudoJavaChangeElement result= (PseudoJavaChangeElement)map.get(element); |
| if (result != null) |
| return result; |
| IJavaElement parent= element.getParent(); |
| if (parent instanceof ICompilationUnit) { |
| result= new PseudoJavaChangeElement(cunitChange, element); |
| children.add(result); |
| map.put(element, result); |
| } else { |
| PseudoJavaChangeElement parentChange= getChangeElement(map, parent, children, cunitChange); |
| result= new PseudoJavaChangeElement(parentChange, element); |
| parentChange.addChild(result); |
| map.put(element, result); |
| } |
| return result; |
| } |
| |
| private boolean coveredBy(TextEditBasedChangeGroup group, IRegion sourceRegion) { |
| int sLength= sourceRegion.getLength(); |
| if (sLength == 0) |
| return false; |
| int sOffset= sourceRegion.getOffset(); |
| int sEnd= sOffset + sLength - 1; |
| TextEdit[] edits= group.getTextEdits(); |
| for (int i= 0; i < edits.length; i++) { |
| TextEdit edit= edits[i]; |
| if (edit.isDeleted()) |
| return false; |
| int rOffset= edit.getOffset(); |
| int rLength= edit.getLength(); |
| int rEnd= rOffset + rLength - 1; |
| if (rLength == 0) { |
| if (!(sOffset < rOffset && rOffset <= sEnd)) |
| return false; |
| } else { |
| if (!(sOffset <= rOffset && rEnd <= sEnd)) |
| return false; |
| } |
| } |
| return true; |
| } |
| } |