case-study/jdt-before/ui refactoring/org/eclipse/jdt/internal/ui/refactoring/CreateTextFileChangePreviewViewer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2011 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.ui.refactoring;
  12
  13 import org.eclipse.swt.SWT;
  14 import org.eclipse.swt.events.DisposeEvent;
  15 import org.eclipse.swt.events.DisposeListener;
  16 import org.eclipse.swt.graphics.Image;
  17 import org.eclipse.swt.widgets.Composite;
  18 import org.eclipse.swt.widgets.Control;
  19
  20 import org.eclipse.core.runtime.IAdaptable;
  21
  22 import org.eclipse.jface.dialogs.Dialog;
  23 import org.eclipse.jface.preference.IPreferenceStore;
  24 import org.eclipse.jface.resource.ImageDescriptor;
  25 import org.eclipse.jface.resource.JFaceResources;
  26
  27 import org.eclipse.jface.text.Document;
  28 import org.eclipse.jface.text.IDocument;
  29 import org.eclipse.jface.text.source.SourceViewer;
  30 import org.eclipse.jface.text.source.SourceViewerConfiguration;
  31
  32 import org.eclipse.ui.model.IWorkbenchAdapter;
  33
  34 import org.eclipse.ltk.core.refactoring.Change;
  35 import org.eclipse.ltk.ui.refactoring.ChangePreviewViewerInput;
  36 import org.eclipse.ltk.ui.refactoring.IChangePreviewViewer;
  37
  38 import org.eclipse.jdt.internal.corext.refactoring.nls.changes.CreateTextFileChange;
  39
  40 import org.eclipse.jdt.ui.PreferenceConstants;
  41 import org.eclipse.jdt.ui.text.JavaSourceViewerConfiguration;
  42 import org.eclipse.jdt.ui.text.JavaTextTools;
  43
  44 import org.eclipse.jdt.internal.ui.JavaPlugin;
  45 import org.eclipse.jdt.internal.ui.propertiesfileeditor.IPropertiesFilePartitions;
  46 import org.eclipse.jdt.internal.ui.propertiesfileeditor.PropertiesFileDocumentSetupParticipant;
  47 import org.eclipse.jdt.internal.ui.propertiesfileeditor.PropertiesFileSourceViewerConfiguration;
  48 import org.eclipse.jdt.internal.ui.util.ViewerPane;
  49
  50 /**
  51  * Change preview viewer for <code>CreateTextFileChange</code> objects.
  52  */
  53 public final class CreateTextFileChangePreviewViewer implements IChangePreviewViewer {
  54
  55         private static class CreateTextFilePreviewer extends ViewerPane {
  56
  57                 private ImageDescriptor fDescriptor;
  58
  59                 private Image fImage;
  60
  61                 public CreateTextFilePreviewer(Composite parent, int style) {
  62                         super(parent, style);
  63                         addDisposeListener(new DisposeListener() {
  64                                 public void widgetDisposed(DisposeEvent e) {
  65                                         disposeImage();
  66                                 }
  67                         });
  68                 }
  69
  70                 /*package*/ void disposeImage() {
  71                         if (fImage != null) {
  72                                 fImage.dispose();
  73                         }
  74                 }
  75
  76                 public void setImageDescriptor(ImageDescriptor imageDescriptor) {
  77                         fDescriptor= imageDescriptor;
  78                 }
  79
  80                 @Override
  81                 public void setText(String text) {
  82                         super.setText(text);
  83                         Image current= null;
  84                         if (fDescriptor != null) {
  85                                 current= fImage;
  86                                 fImage= fDescriptor.createImage();
  87                         } else {
  88                                 current= fImage;
  89                                 fImage= null;
  90                         }
  91                         setImage(fImage);
  92                         if (current != null) {
  93                                 current.dispose();
  94                         }
  95                 }
  96
  97         }
  98
  99         private CreateTextFilePreviewer fPane;
 100
 101         private SourceViewer fSourceViewer;
 102
 103         /**
 104          * {@inheritDoc}
 105          */
 106         public void createControl(Composite parent) {
 107                 fPane= new CreateTextFilePreviewer(parent, SWT.BORDER | SWT.FLAT);
 108                 Dialog.applyDialogFont(fPane);
 109
 110                 fSourceViewer= new SourceViewer(fPane, null, SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.FULL_SELECTION);
 111                 fSourceViewer.setEditable(false);
 112                 fSourceViewer.getControl().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT));
 113                 fPane.setContent(fSourceViewer.getControl());
 114         }
 115
 116         /**
 117          * {@inheritDoc}
 118          */
 119         public Control getControl() {
 120                 return fPane;
 121         }
 122
 123         public void refresh() {
 124                 fSourceViewer.refresh();
 125         }
 126
 127
 128         /**
 129          * {@inheritDoc}
 130          */
 131         public void setInput(ChangePreviewViewerInput input) {
 132                 Change change= input.getChange();
 133                 if (change != null) {
 134                         Object element= change.getModifiedElement();
 135                         if (element instanceof IAdaptable) {
 136                                 IAdaptable adaptable= (IAdaptable) element;
 137                                 IWorkbenchAdapter workbenchAdapter= (IWorkbenchAdapter) adaptable.getAdapter(IWorkbenchAdapter.class);
 138                                 if (workbenchAdapter != null) {
 139                                         fPane.setImageDescriptor(workbenchAdapter.getImageDescriptor(element));
 140                                 } else {
 141                                         fPane.setImageDescriptor(null);
 142                                 }
 143                         } else {
 144                                 fPane.setImageDescriptor(null);
 145                         }
 146                 }
 147                 if (!(change instanceof CreateTextFileChange)) {
 148                         fSourceViewer.setInput(null);
 149                         fPane.setText(""); //$NON-NLS-1$
 150                         return;
 151                 }
 152                 CreateTextFileChange textFileChange= (CreateTextFileChange) change;
 153                 fPane.setText(textFileChange.getName());
 154                 IDocument document= new Document(textFileChange.getPreview());
 155                 // This is a temporary work around until we get the
 156                 // source viewer registry.
 157                 fSourceViewer.unconfigure();
 158                 String textType= textFileChange.getTextType();
 159                 JavaTextTools textTools= JavaPlugin.getDefault().getJavaTextTools();
 160                 IPreferenceStore store= JavaPlugin.getDefault().getCombinedPreferenceStore();
 161                 if ("java".equals(textType)) { //$NON-NLS-1$
 162                         textTools.setupJavaDocumentPartitioner(document);
 163                         fSourceViewer.configure(new JavaSourceViewerConfiguration(textTools.getColorManager(), store, null, null));
 164                 } else if ("properties".equals(textType)) { //$NON-NLS-1$
 165                         PropertiesFileDocumentSetupParticipant.setupDocument(document);
 166                         fSourceViewer.configure(new PropertiesFileSourceViewerConfiguration(textTools.getColorManager(), store, null, IPropertiesFilePartitions.PROPERTIES_FILE_PARTITIONING));
 167                 } else {
 168                         fSourceViewer.configure(new SourceViewerConfiguration());
 169                 }
 170                 fSourceViewer.setInput(document);
 171         }
 172 }