case-study/jdt-after/ui refactoring/org/eclipse/jdt/internal/ui/refactoring/actions/RenameJavaElementAction.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.actions;
  12
  13 import org.eclipse.core.runtime.CoreException;
  14
  15 import org.eclipse.jface.dialogs.MessageDialog;
  16 import org.eclipse.jface.viewers.IStructuredSelection;
  17
  18 import org.eclipse.jface.text.ITextSelection;
  19
  20 import org.eclipse.ui.IWorkbenchSite;
  21
  22 import org.eclipse.jdt.core.IJavaElement;
  23 import org.eclipse.jdt.core.JavaModelException;
  24
  25 import org.eclipse.jdt.internal.corext.refactoring.RefactoringAvailabilityTester;
  26 import org.eclipse.jdt.internal.corext.util.JavaModelUtil;
  27
  28 import org.eclipse.jdt.ui.actions.RenameAction;
  29 import org.eclipse.jdt.ui.actions.SelectionDispatchAction;
  30
  31 import org.eclipse.jdt.internal.ui.JavaPlugin;
  32 import org.eclipse.jdt.internal.ui.actions.ActionUtil;
  33 import org.eclipse.jdt.internal.ui.actions.SelectionConverter;
  34 import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor;
  35 import org.eclipse.jdt.internal.ui.javaeditor.JavaTextSelection;
  36 import org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages;
  37 import org.eclipse.jdt.internal.ui.refactoring.reorg.RenameLinkedMode;
  38 import org.eclipse.jdt.internal.ui.util.ExceptionHandler;
  39
  40 public class RenameJavaElementAction extends SelectionDispatchAction {
  41
  42         public JavaEditor fEditor;
  43
  44         public RenameJavaElementAction(IWorkbenchSite site) {
  45                 super(site);
  46         }
  47
  48         public RenameJavaElementAction(JavaEditor editor) {
  49                 this(editor.getEditorSite());
  50                 fEditor= editor;
  51                 setEnabled(SelectionConverter.canOperateOn(fEditor));
  52         }
  53
  54         //---- Structured selection ------------------------------------------------
  55
  56         @Override
  57         public void selectionChanged(IStructuredSelection selection) {
  58                 try {
  59                         if (selection.size() == 1) {
  60                                 setEnabled(canEnable(selection));
  61                                 return;
  62                         }
  63                 } catch (JavaModelException e) {
  64                         // http://bugs.eclipse.org/bugs/show_bug.cgi?id=19253
  65                         if (JavaModelUtil.isExceptionToBeLogged(e))
  66                                 JavaPlugin.log(e);
  67                 } catch (CoreException e) {
  68                         JavaPlugin.log(e);
  69                 }
  70                 setEnabled(false);
  71         }
  72
  73         private static boolean canEnable(IStructuredSelection selection) throws CoreException {
  74                 IJavaElement element= getJavaElement(selection);
  75                 if (element == null)
  76                         return false;
  77                 return RefactoringAvailabilityTester.isRenameElementAvailable(element);
  78         }
  79
  80         private static IJavaElement getJavaElement(IStructuredSelection selection) {
  81                 if (selection.size() != 1)
  82                         return null;
  83                 Object first= selection.getFirstElement();
  84                 if (! (first instanceof IJavaElement))
  85                         return null;
  86                 return (IJavaElement)first;
  87         }
  88
  89         @Override
  90         public void run(IStructuredSelection selection) {
  91                 IJavaElement element= getJavaElement(selection);
  92                 if (element == null)
  93                         return;
  94                 if (!ActionUtil.isEditable(getShell(), element))
  95                         return;
  96                 try {
  97                         run(element, false);
  98                 } catch (CoreException e){
  99                         ExceptionHandler.handle(e, RefactoringMessages.RenameJavaElementAction_name, RefactoringMessages.RenameJavaElementAction_exception);
 100                 }
 101         }
 102
 103         //---- text selection ------------------------------------------------------------
 104
 105         @Override
 106         public void selectionChanged(ITextSelection selection) {
 107                 if (selection instanceof JavaTextSelection) {
 108                         try {
 109                                 JavaTextSelection javaTextSelection= (JavaTextSelection)selection;
 110                                 javaTextSelection.generated_5438255568821321088(this);
 111                         } catch (CoreException e) {
 112                                 setEnabled(false);
 113                         }
 114                 } else {
 115                         setEnabled(true);
 116                 }
 117         }
 118
 119         @Override
 120         public void run(ITextSelection selection) {
 121                 if (!ActionUtil.isEditable(fEditor))
 122                         return;
 123                 if (canRunInEditor())
 124                         doRun();
 125                 else
 126                         MessageDialog.openInformation(getShell(), RefactoringMessages.RenameAction_rename, RefactoringMessages.RenameAction_unavailable);
 127         }
 128
 129         public void doRun() {
 130                 RenameLinkedMode activeLinkedMode= RenameLinkedMode.getActiveLinkedMode();
 131                 fEditor.generated_8200945043267225784(this, activeLinkedMode);
 132         }
 133
 134         public boolean canRunInEditor() {
 135                 if (RenameLinkedMode.getActiveLinkedMode() != null)
 136                         return true;
 137
 138                 try {
 139                         IJavaElement element= getJavaElementFromEditor();
 140                         if (element == null)
 141                                 return true;
 142
 143                         return RefactoringAvailabilityTester.isRenameElementAvailable(element);
 144                 } catch (JavaModelException e) {
 145                         if (JavaModelUtil.isExceptionToBeLogged(e))
 146                                 JavaPlugin.log(e);
 147                 } catch (CoreException e) {
 148                         JavaPlugin.log(e);
 149                 }
 150                 return false;
 151         }
 152
 153         public IJavaElement getJavaElementFromEditor() throws JavaModelException {
 154                 IJavaElement[] elements= SelectionConverter.codeResolve(fEditor);
 155                 if (elements == null || elements.length != 1)
 156                         return null;
 157                 return elements[0];
 158         }
 159
 160         //---- helper methods -------------------------------------------------------------------
 161
 162         public void run(IJavaElement element, boolean lightweight) throws CoreException {
 163                 // Work around for http://dev.eclipse.org/bugs/show_bug.cgi?id=19104
 164                 fEditor.generated_2614579944211237230(this, element, lightweight);
 165         }
 166
 167         public boolean generated_2354557891330186788(RenameAction renameaction) {
 168                 if (renameaction.fRenameResource != null) {
 169                         return isEnabled() || renameaction.fRenameResource.isEnabled();
 170                 } else {
 171                         return isEnabled();
 172                 }
 173         }
 174
 175         public void generated_7638298966405843794(RenameAction renameaction, IStructuredSelection selection) {
 176                 if (isEnabled())
 177                         run(selection);
 178                 if (renameaction.fRenameResource != null && renameaction.fRenameResource.isEnabled())
 179                         renameaction.fRenameResource.run(selection);
 180         }
 181
 182         public void generated_7345641368706726701(ITextSelection selection) {
 183                 if (isEnabled())
 184                         run(selection);
 185         }
 186 }