net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/actions/AddBlockCommentAction.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.actions;
  12
  13 import java.util.LinkedList;
  14 import java.util.List;
  15 import java.util.ResourceBundle;
  16
  17 import net.sourceforge.phpdt.internal.corext.Assert;
  18 import net.sourceforge.phpdt.internal.ui.text.IPHPPartitions;
  19
  20 import org.eclipse.jface.text.BadLocationException;
  21 import org.eclipse.jface.text.BadPartitioningException;
  22 import org.eclipse.jface.text.IDocument;
  23 import org.eclipse.jface.text.IDocumentExtension3;
  24 import org.eclipse.jface.text.ITextSelection;
  25 import org.eclipse.jface.text.ITypedRegion;
  26 import org.eclipse.ui.texteditor.ITextEditor;
  27
  28 /**
  29  * Action that encloses the editor's current selection with Java block comment terminators
  30  * (<code>&#47;&#42;</code> and <code>&#42;&#47;</code>).
  31  *
  32  * @since 3.0
  33  */
  34 public class AddBlockCommentAction extends BlockCommentAction {
  35
  36         /**
  37          * Creates a new instance.
  38          *
  39          * @param bundle the resource bundle
  40          * @param prefix a prefix to be prepended to the various resource keys
  41          *   (described in <code>ResourceAction</code> constructor), or
  42          *   <code>null</code> if none
  43          * @param editor the text editor
  44          */
  45         public AddBlockCommentAction(ResourceBundle bundle, String prefix, ITextEditor editor) {
  46                 super(bundle, prefix, editor);
  47         }
  48
  49         /*
  50          * @see org.eclipse.jdt.internal.ui.actions.BlockCommentAction#runInternal(org.eclipse.jface.text.ITextSelection, org.eclipse.jface.text.IDocumentExtension3, org.eclipse.jdt.internal.ui.actions.BlockCommentAction.Edit.EditFactory)
  51          */
  52         protected void runInternal(ITextSelection selection, IDocumentExtension3 docExtension, Edit.EditFactory factory) throws BadLocationException, BadPartitioningException {
  53                 int selectionOffset= selection.getOffset();
  54                 int selectionEndOffset= selectionOffset + selection.getLength();
  55                 List edits= new LinkedList();
  56                 ITypedRegion partition= docExtension.getPartition(IPHPPartitions.PHP_PARTITIONING, selectionOffset);
  57
  58                 handleFirstPartition(partition, edits, factory, selectionOffset);
  59
  60                 while (partition.getOffset() + partition.getLength() < selectionEndOffset) {
  61                         partition= handleInteriorPartition(partition, edits, factory, docExtension);
  62                 }
  63
  64                 handleLastPartition(partition, edits, factory, selectionEndOffset);
  65
  66                 executeEdits(edits);
  67         }
  68
  69         /**
  70          * Handle the first partition of the selected text.
  71          *
  72          * @param partition
  73          * @param edits
  74          * @param factory
  75          * @param offset
  76          */
  77         private void handleFirstPartition(ITypedRegion partition, List edits, Edit.EditFactory factory, int offset) throws BadLocationException {
  78
  79                 int partOffset= partition.getOffset();
  80                 String partType= partition.getType();
  81
  82                 Assert.isTrue(partOffset <= offset, "illegal partition"); //$NON-NLS-1$
  83
  84                 // first partition: mark start of comment
  85                 if (partType == IDocument.DEFAULT_CONTENT_TYPE) {
  86                         // Java code: right where selection starts
  87                         edits.add(factory.createEdit(offset, 0, getCommentStart()));
  88                 } else if (isSpecialPartition(partType)) {
  89                         // special types: include the entire partition
  90                         edits.add(factory.createEdit(partOffset, 0, getCommentStart()));
  91                 }       // javadoc: no mark, will only start after comment
  92
  93         }
  94
  95         /**
  96          * Handles the end of the given partition and the start of the next partition, which is returned.
  97          *
  98          * @param partition
  99          * @param edits
 100          * @param factory
 101          * @param docExtension
 102          * @return
 103          * @throws BadLocationException
 104          * @throws BadPartitioningException
 105          */
 106         private ITypedRegion handleInteriorPartition(ITypedRegion partition, List edits, Edit.EditFactory factory, IDocumentExtension3 docExtension) throws BadPartitioningException, BadLocationException {
 107
 108                 // end of previous partition
 109                 String partType= partition.getType();
 110                 int partEndOffset= partition.getOffset() + partition.getLength();
 111                 int tokenLength= getCommentStart().length();
 112
 113                 boolean wasJavadoc= false; // true if the previous partition is javadoc
 114
 115                 if (partType == IPHPPartitions.PHP_MULTILINE_COMMENT) {
 116
 117                         wasJavadoc= true;
 118
 119 //              } else if (partType == IPHPPartitions.JAVA_MULTI_LINE_COMMENT) {
 120 //
 121 //                      // already in a comment - remove ending mark
 122 //                      edits.add(factory.createEdit(partEndOffset - tokenLength, tokenLength, "")); //$NON-NLS-1$
 123 //
 124                 }
 125
 126                 // advance to next partition
 127                 partition= docExtension.getPartition(IPHPPartitions.PHP_PARTITIONING, partEndOffset);
 128                 partType= partition.getType();
 129
 130                 // start of next partition
 131                 if (wasJavadoc) {
 132
 133                         // if previous was javadoc, and the current one is not, then add block comment start
 134                         if (partType == IDocument.DEFAULT_CONTENT_TYPE
 135                                         || isSpecialPartition(partType)) {
 136                                 edits.add(factory.createEdit(partition.getOffset(), 0, getCommentStart()));
 137                         }
 138
 139                 } else { // !wasJavadoc
 140
 141                         if (partType == IPHPPartitions.PHP_MULTILINE_COMMENT) {
 142                                 // if next is javadoc, end block comment before
 143                                 edits.add(factory.createEdit(partition.getOffset(), 0, getCommentEnd()));
 144 //                      } else if (partType == IJavaPartitions.JAVA_MULTI_LINE_COMMENT) {
 145 //                              // already in a comment - remove startToken
 146 //                              edits.add(factory.createEdit(partition.getOffset(), getCommentStart().length(), "")); //$NON-NLS-1$
 147                         }
 148                 }
 149
 150                 return partition;
 151         }
 152
 153         /**
 154          * Handles the end of the last partition.
 155          *
 156          * @param partition
 157          * @param edits
 158          * @param factory
 159          * @param endOffset
 160          */
 161         private void handleLastPartition(ITypedRegion partition, List edits, Edit.EditFactory factory, int endOffset) throws BadLocationException {
 162
 163                 String partType= partition.getType();
 164
 165                 if (partType == IDocument.DEFAULT_CONTENT_TYPE) {
 166                         // normal java: end comment where selection ends
 167                         edits.add(factory.createEdit(endOffset, 0, getCommentEnd()));
 168                 } else if (isSpecialPartition(partType)) {
 169                         // special types: consume entire partition
 170                         edits.add(factory.createEdit(partition.getOffset() + partition.getLength(), 0, getCommentEnd()));
 171                 }
 172
 173         }
 174
 175         /**
 176          * Returns whether <code>partType</code> is special, i.e. a Java <code>String</code>,
 177          * <code>Character</code>, or <code>Line End Comment</code> partition.
 178          *
 179          * @param partType the partition type to check
 180          * @return <code>true</code> if <code>partType</code> is special, <code>false</code> otherwise
 181          */
 182         private boolean isSpecialPartition(String partType) {
 183                 return// partType == IPHPPartitions.PHP_CHARACTER
 184                                 //||
 185                                 partType == IPHPPartitions.PHP_STRING;
 186                                 //|| partType == IPHPPartitions.PHP_SINGLE_LINE_COMMENT;
 187         }
 188
 189         /*
 190          * @see org.eclipse.jdt.internal.ui.actions.BlockCommentAction#validSelection(org.eclipse.jface.text.ITextSelection)
 191          */
 192         protected boolean isValidSelection(ITextSelection selection) {
 193                 return selection != null && !selection.isEmpty() && selection.getLength() > 0;
 194         }
 195
 196 }