case-study/jdt-before/ui/org/eclipse/jdt/internal/ui/actions/RemoveBlockCommentAction.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.actions;
  12
  13 import java.util.LinkedList;
  14 import java.util.List;
  15 import java.util.ResourceBundle;
  16
  17 import org.eclipse.jface.text.BadLocationException;
  18 import org.eclipse.jface.text.BadPartitioningException;
  19 import org.eclipse.jface.text.IDocumentExtension3;
  20 import org.eclipse.jface.text.ITextSelection;
  21 import org.eclipse.jface.text.ITypedRegion;
  22
  23 import org.eclipse.ui.texteditor.ITextEditor;
  24
  25 import org.eclipse.jdt.ui.text.IJavaPartitions;
  26
  27
  28 /**
  29  * Action that removes the enclosing comment marks from a Java block comment.
  30  *
  31  * @since 3.0
  32  */
  33 public class RemoveBlockCommentAction extends BlockCommentAction {
  34
  35         /**
  36          * Creates a new instance.
  37          *
  38          * @param bundle the resource bundle
  39          * @param prefix a prefix to be prepended to the various resource keys
  40          *   (described in <code>ResourceAction</code> constructor), or
  41          *   <code>null</code> if none
  42          * @param editor the text editor
  43          */
  44         public RemoveBlockCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
  45                 super(bundle, prefix, editor);
  46         }
  47
  48         /*
  49          * @see org.eclipse.jdt.internal.ui.actions.AddBlockCommentAction#runInternal(org.eclipse.jface.text.ITextSelection, org.eclipse.jface.text.IDocumentExtension3, org.eclipse.jdt.internal.ui.actions.AddBlockCommentAction.Edit.EditFactory)
  50          */
  51         @Override
  52         protected void runInternal(ITextSelection selection, IDocumentExtension3 docExtension, Edit.EditFactory factory) throws BadPartitioningException, BadLocationException {
  53                 List<Edit> edits= new LinkedList<Edit>();
  54                 int tokenLength= getCommentStart().length();
  55
  56                 int offset= selection.getOffset();
  57                 int endOffset= offset + selection.getLength();
  58
  59                 ITypedRegion partition= docExtension.getPartition(IJavaPartitions.JAVA_PARTITIONING, offset, false);
  60                 int partOffset= partition.getOffset();
  61                 int partEndOffset= partOffset + partition.getLength();
  62
  63                 while (partEndOffset < endOffset) {
  64
  65                         if (partition.getType() == IJavaPartitions.JAVA_MULTI_LINE_COMMENT) {
  66                                 edits.add(factory.createEdit(partOffset, tokenLength, "")); //$NON-NLS-1$
  67                                 edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
  68                         }
  69
  70                         partition= docExtension.getPartition(IJavaPartitions.JAVA_PARTITIONING, partEndOffset, false);
  71                         partOffset= partition.getOffset();
  72                         partEndOffset= partOffset + partition.getLength();
  73                 }
  74
  75                 if (partition.getType() == IJavaPartitions.JAVA_MULTI_LINE_COMMENT) {
  76                         edits.add(factory.createEdit(partOffset, tokenLength, "")); //$NON-NLS-1$
  77                         edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
  78                 }
  79
  80                 executeEdits(edits);
  81         }
  82
  83         /*
  84          * @see org.eclipse.jdt.internal.ui.actions.AddBlockCommentAction#validSelection(org.eclipse.jface.text.ITextSelection)
  85          */
  86         @Override
  87         protected boolean isValidSelection(ITextSelection selection) {
  88                 return selection != null && !selection.isEmpty();
  89         }
  90
  91 }