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   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.text.java;
  12
  13 import net.sourceforge.phpdt.ui.PreferenceConstants;
  14 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  15
  16 import org.eclipse.jface.preference.IPreferenceStore;
  17 import org.eclipse.jface.text.BadLocationException;
  18 import org.eclipse.jface.text.DefaultIndentLineAutoEditStrategy;
  19 import org.eclipse.jface.text.DocumentCommand;
  20 import org.eclipse.jface.text.IDocument;
  21 import org.eclipse.jface.text.IRegion;
  22 import org.eclipse.jface.text.ITypedRegion;
  23 import org.eclipse.jface.text.TextUtilities;
  24 import org.eclipse.ui.IEditorPart;
  25 import org.eclipse.ui.IWorkbenchPage;
  26 import org.eclipse.ui.texteditor.ITextEditorExtension3;
  27
  28 /**
  29  * Auto indent strategy for java strings
  30  */
  31 public class JavaStringAutoIndentStrategyDQ extends
  32                 DefaultIndentLineAutoEditStrategy {
  33
  34         private String fPartitioning;
  35
  36         /**
  37          * The input string doesn't contain any line delimiter.
  38          *
  39          * @param inputString
  40          *            the given input string
  41          * @return the displayable string.
  42          */
  43         private String displayString(String inputString, String indentation,
  44                         String delimiter) {
  45
  46                 int length = inputString.length();
  47                 StringBuffer buffer = new StringBuffer(length);
  48                 java.util.StringTokenizer tokenizer = new java.util.StringTokenizer(
  49                                 inputString, "\n\r", true); //$NON-NLS-1$
  50                 while (tokenizer.hasMoreTokens()) {
  51
  52                         String token = tokenizer.nextToken();
  53                         if (token.equals("\r")) { //$NON-NLS-1$
  54                                 buffer.append("\\r"); //$NON-NLS-1$
  55                                 if (tokenizer.hasMoreTokens()) {
  56                                         token = tokenizer.nextToken();
  57                                         if (token.equals("\n")) { //$NON-NLS-1$
  58                                                 buffer.append("\\n"); //$NON-NLS-1$
  59                                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  60                                                 buffer.append(indentation);
  61                                                 buffer.append("\""); //$NON-NLS-1$
  62                                                 continue;
  63                                         } else {
  64                                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  65                                                 buffer.append(indentation);
  66                                                 buffer.append("\""); //$NON-NLS-1$
  67                                         }
  68                                 } else {
  69                                         continue;
  70                                 }
  71                         } else if (token.equals("\n")) { //$NON-NLS-1$
  72                                 buffer.append("\\n"); //$NON-NLS-1$
  73                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  74                                 buffer.append(indentation);
  75                                 buffer.append("\""); //$NON-NLS-1$
  76                                 continue;
  77                         }
  78
  79                         StringBuffer tokenBuffer = new StringBuffer();
  80                         for (int i = 0; i < token.length(); i++) {
  81                                 char c = token.charAt(i);
  82                                 switch (c) {
  83                                 case '\r':
  84                                         tokenBuffer.append("\\r"); //$NON-NLS-1$
  85                                         break;
  86                                 case '\n':
  87                                         tokenBuffer.append("\\n"); //$NON-NLS-1$
  88                                         break;
  89                                 case '\b':
  90                                         tokenBuffer.append("\\b"); //$NON-NLS-1$
  91                                         break;
  92                                 case '\t':
  93                                         // keep tabs verbatim
  94                                         tokenBuffer.append("\t"); //$NON-NLS-1$
  95                                         break;
  96                                 case '\f':
  97                                         tokenBuffer.append("\\f"); //$NON-NLS-1$
  98                                         break;
  99                                 case '\"':
 100                                         tokenBuffer.append("\\\""); //$NON-NLS-1$
 101                                         break;
 102                                 case '\'':
 103                                         tokenBuffer.append("\\'"); //$NON-NLS-1$
 104                                         break;
 105                                 case '\\':
 106                                         tokenBuffer.append("\\\\"); //$NON-NLS-1$
 107                                         break;
 108                                 default:
 109                                         tokenBuffer.append(c);
 110                                 }
 111                         }
 112                         buffer.append(tokenBuffer);
 113                 }
 114                 return buffer.toString();
 115         }
 116
 117         /**
 118          * Creates a new Java string auto indent strategy for the given document
 119          * partitioning.
 120          *
 121          * @param partitioning
 122          *            the document partitioning
 123          */
 124         public JavaStringAutoIndentStrategyDQ(String partitioning) {
 125                 super();
 126                 fPartitioning = partitioning;
 127         }
 128
 129         private boolean isLineDelimiter(IDocument document, String text) {
 130                 String[] delimiters = document.getLegalLineDelimiters();
 131                 if (delimiters != null)
 132                         return TextUtilities.equals(delimiters, text) > -1;
 133                 return false;
 134         }
 135
 136         private String getLineIndentation(IDocument document, int offset)
 137                         throws BadLocationException {
 138
 139                 // find start of line
 140                 int adjustedOffset = (offset == document.getLength() ? offset - 1
 141                                 : offset);
 142                 IRegion line = document.getLineInformationOfOffset(adjustedOffset);
 143                 int start = line.getOffset();
 144
 145                 // find white spaces
 146                 int end = findEndOfWhiteSpace(document, start, offset);
 147
 148                 return document.get(start, end - start);
 149         }
 150
 151         private String getModifiedText(String string, String indentation,
 152                         String delimiter) throws BadLocationException {
 153                 return displayString(string, indentation, delimiter);
 154         }
 155
 156         private void javaStringIndentAfterNewLine(IDocument document,
 157                         DocumentCommand command) throws BadLocationException {
 158
 159                 ITypedRegion partition = TextUtilities.getPartition(document,
 160                                 fPartitioning, command.offset, false);
 161                 int offset = partition.getOffset();
 162                 int length = partition.getLength();
 163
 164                 if (command.offset == offset) {
 165                         // we are really just before the string partition -> feet the event
 166                         // through the java indenter
 167                         // new
 168                         // JavaAutoIndentStrategy(fPartitioning).customizeDocumentCommand(document,
 169                         // command);
 170                         return;
 171                 }
 172
 173                 if (command.offset == offset + length
 174                                 && document.getChar(offset + length - 1) == '\"')
 175                         return;
 176
 177                 String indentation = getLineIndentation(document, command.offset);
 178                 String delimiter = TextUtilities.getDefaultLineDelimiter(document);
 179
 180                 IRegion line = document.getLineInformationOfOffset(offset);
 181                 String string = document.get(line.getOffset(), offset
 182                                 - line.getOffset());
 183                 if (string.trim().length() != 0)
 184                         indentation += String.valueOf("\t\t"); //$NON-NLS-1$
 185
 186                 IPreferenceStore preferenceStore = PHPeclipsePlugin.getDefault()
 187                                 .getPreferenceStore();
 188                 if (isLineDelimiter(document, command.text))
 189                         command.text = "\" ." + command.text + indentation + "\""; //$NON-NLS-1$//$NON-NLS-2$
 190                 else if (command.text.length() > 1
 191                                 && preferenceStore
 192                                                 .getBoolean(PreferenceConstants.EDITOR_ESCAPE_STRINGS_DQ))
 193                         command.text = getModifiedText(command.text, indentation, delimiter);
 194         }
 195
 196         private boolean isSmartMode() {
 197                 IWorkbenchPage page = PHPeclipsePlugin.getActivePage();
 198                 if (page != null) {
 199                         IEditorPart part = page.getActiveEditor();
 200                         if (part instanceof ITextEditorExtension3) {
 201                                 ITextEditorExtension3 extension = (ITextEditorExtension3) part;
 202                                 return extension.getInsertMode() == ITextEditorExtension3.SMART_INSERT;
 203                         }
 204                 }
 205                 return false;
 206         }
 207
 208         /*
 209          * @see org.eclipse.jface.text.IAutoIndentStrategy#customizeDocumentCommand(IDocument,
 210          *      DocumentCommand)
 211          */
 212         public void customizeDocumentCommand(IDocument document,
 213                         DocumentCommand command) {
 214                 try {
 215                         if (command.length != 0 || command.text == null)
 216                                 return;
 217
 218                         IPreferenceStore preferenceStore = PHPeclipsePlugin.getDefault()
 219                                         .getPreferenceStore();
 220
 221                         if (preferenceStore
 222                                         .getBoolean(PreferenceConstants.EDITOR_WRAP_STRINGS_DQ)
 223                                         && isSmartMode())
 224                                 javaStringIndentAfterNewLine(document, command);
 225
 226                 } catch (BadLocationException e) {
 227                 }
 228         }
 229 }