| /******************************************************************************* |
| * 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.compare; |
| |
| import java.io.*; |
| import java.util.ResourceBundle; |
| import java.text.MessageFormat; |
| |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.viewers.*; |
| import org.eclipse.jface.dialogs.MessageDialog; |
| |
| import org.eclipse.ui.IActionDelegate; |
| |
| import org.eclipse.core.runtime.CoreException; |
| |
| import org.eclipse.jdt.core.*; |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.ui.JavaElementLabelProvider; |
| |
| import org.eclipse.compare.*; |
| import org.eclipse.compare.structuremergeviewer.DiffNode; |
| |
| |
| public class JavaCompareAction implements IActionDelegate { |
| |
| class TypedElement implements ITypedElement, IEncodedStreamContentAccessor { |
| |
| private ISourceReference fSource; |
| private String fContents; |
| |
| TypedElement(ISourceReference s, String contents) { |
| fSource= s; |
| fContents= contents; |
| } |
| |
| public String getName() { |
| return fJavaElementLabelProvider.getText(fSource); |
| } |
| |
| public String getType() { |
| return "JAVA"; //$NON-NLS-1$ |
| } |
| |
| public Image getImage() { |
| return fJavaElementLabelProvider.getImage(fSource); |
| } |
| |
| public InputStream getContents() throws CoreException { |
| byte[] bytes; |
| try { |
| bytes= fContents.getBytes("UTF-16"); //$NON-NLS-1$ |
| } catch (UnsupportedEncodingException e) { |
| bytes= fContents.getBytes(); |
| } |
| return new ByteArrayInputStream(bytes); |
| } |
| |
| public String getCharset() { |
| return "UTF-16"; //$NON-NLS-1$ |
| } |
| } |
| |
| private static final String BUNDLE_NAME= "org.eclipse.jdt.internal.ui.compare.CompareAction"; //$NON-NLS-1$ |
| |
| private ISourceReference fLeft; |
| private ISourceReference fRight; |
| |
| private JavaElementLabelProvider fJavaElementLabelProvider; |
| |
| |
| public void selectionChanged(IAction action, ISelection selection) { |
| action.setEnabled(isEnabled(selection)); |
| } |
| |
| public void run(IAction action) { |
| Shell shell= JavaPlugin.getActiveWorkbenchShell(); |
| ResourceBundle bundle= ResourceBundle.getBundle(BUNDLE_NAME); |
| CompareDialog d= new CompareDialog(shell, bundle); |
| |
| |
| String left= null; |
| String right= null; |
| |
| try { |
| left= getExtendedSource(fLeft); |
| } catch (JavaModelException ex) { |
| JavaPlugin.log(ex); |
| } |
| |
| try { |
| right= getExtendedSource(fRight); |
| } catch (JavaModelException ex) { |
| JavaPlugin.log(ex); |
| } |
| |
| fJavaElementLabelProvider= new JavaElementLabelProvider( |
| JavaElementLabelProvider.SHOW_PARAMETERS | |
| JavaElementLabelProvider.SHOW_OVERLAY_ICONS | |
| JavaElementLabelProvider.SHOW_ROOT); |
| |
| if (left == null || right == null) { |
| String errorTitle= JavaCompareUtilities.getString(bundle, "errorTitle"); //$NON-NLS-1$ |
| String errorFormat= JavaCompareUtilities.getString(bundle, "errorFormat"); //$NON-NLS-1$ |
| |
| Object element= null; |
| if (left == null) |
| element= fLeft; |
| else |
| element= fRight; |
| |
| String message= MessageFormat.format(errorFormat, new String[] { fJavaElementLabelProvider.getText(element) } ); |
| |
| MessageDialog.openError(shell, errorTitle, message); |
| return; |
| } |
| |
| d.compare(new DiffNode(new TypedElement(fLeft, left), new TypedElement(fRight, right))); |
| |
| fJavaElementLabelProvider.dispose(); |
| fJavaElementLabelProvider= null; |
| } |
| |
| protected boolean isEnabled(ISelection selection) { |
| if (selection instanceof IStructuredSelection) { |
| Object[] sel= ((IStructuredSelection) selection).toArray(); |
| if (sel.length == 2) { |
| for (int i= 0; i < 2; i++) { |
| Object o= sel[i]; |
| if (!(o instanceof ISourceReference)) |
| return false; |
| } |
| fLeft= (ISourceReference) sel[0]; |
| fRight= (ISourceReference) sel[1]; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| private String getExtendedSource(ISourceReference ref) throws JavaModelException { |
| |
| // get parent |
| if (ref instanceof IJavaElement) { |
| IJavaElement parent= ((IJavaElement) ref).getParent(); |
| if (parent instanceof ISourceReference) { |
| ISourceReference sr= (ISourceReference) parent; |
| String parentContent= sr.getSource(); |
| if (parentContent != null) { |
| ISourceRange parentRange= sr.getSourceRange(); |
| ISourceRange childRange= ref.getSourceRange(); |
| |
| int start= childRange.getOffset() - parentRange.getOffset(); |
| int end= start + childRange.getLength(); |
| |
| // search backwards for beginning of line |
| while (start > 0) { |
| char c= parentContent.charAt(start-1); |
| if (c == '\n' || c == '\r') |
| break; |
| start--; |
| } |
| |
| return parentContent.substring(start, end); |
| } |
| } |
| } |
| |
| return ref.getSource(); |
| } |
| } |