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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 single quoted PHP strings
  30  */
  31 public class JavaStringAutoIndentStrategySQ 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, String delimiter) {
  44                 int length = inputString.length();
  45                 StringBuffer buffer = new StringBuffer(length);
  46                 java.util.StringTokenizer tokenizer =
  47                                 new java.util.StringTokenizer (inputString, "\n\r", true); //$NON-NLS-1$
  48
  49                 while (tokenizer.hasMoreTokens ()) {
  50                         String token = tokenizer.nextToken ();
  51
  52                         if (token.equals("\r")) { //$NON-NLS-1$
  53                                 buffer.append("\\r"); //$NON-NLS-1$
  54                                 if (tokenizer.hasMoreTokens()) {
  55                                         token = tokenizer.nextToken();
  56                                         if (token.equals("\n")) { //$NON-NLS-1$
  57                                                 buffer.append("\\n"); //$NON-NLS-1$
  58                                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  59                                                 buffer.append(indentation);
  60                                                 buffer.append("\'"); //$NON-NLS-1$
  61                                                 continue;
  62                                         } else {
  63                                                 buffer.append("\' . " + delimiter); //$NON-NLS-1$
  64                                                 buffer.append(indentation);
  65                                                 buffer.append("\'"); //$NON-NLS-1$
  66                                         }
  67                                 } else {
  68                                         continue;
  69                                 }
  70                         } else if (token.equals("\n")) { //$NON-NLS-1$
  71                                 buffer.append("\\n"); //$NON-NLS-1$
  72                                 buffer.append("\' . " + delimiter); //$NON-NLS-1$
  73                                 buffer.append(indentation);
  74                                 buffer.append("\'"); //$NON-NLS-1$
  75                                 continue;
  76                         }
  77
  78                         StringBuffer tokenBuffer = new StringBuffer();
  79
  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
 115                 return buffer.toString();
 116         }
 117
 118         /**
 119          * Creates a new Java string auto indent strategy for the given document
 120          * partitioning.
 121          *
 122          * @param partitioning
 123          *            the document partitioning
 124          */
 125         public JavaStringAutoIndentStrategySQ (String partitioning) {
 126                 super();
 127                 fPartitioning = partitioning;
 128         }
 129
 130         /**
 131          * Check whether the 'text' is one of the allowed line delimiters (e.g. \n \r)
 132          *
 133          * @param document The document object for which we do the check
 134          * @param text     The text with the possible delimiter
 135          * @return
 136          *  - true if 'text' is a valid delimiter
 137          *  - false if 'text' is not a valid delimiter
 138          */
 139         private boolean isLineDelimiter(IDocument document, String text) {
 140                 String[] delimiters = document.getLegalLineDelimiters();
 141
 142                 if (delimiters != null) {
 143                         return TextUtilities.equals(delimiters, text) > -1;
 144                 }
 145
 146                 return false;
 147         }
 148
 149         /**
 150          * Get back the indentation of the line to which the offset belongs.
 151          *
 152          * It searches the first occurrence of a white space (non space/non tab)
 153          *
 154          * @param document
 155          * @param offset
 156          * @return
 157          * @throws BadLocationException
 158          */
 159         private String getLineIndentation(IDocument document, int offset)
 160                         throws BadLocationException {
 161                 String indentation = "";
 162                 int    start;
 163                 int    end;
 164                 int    length;
 165
 166                 // find start of line
 167                 int adjustedOffset = (offset == document.getLength() ? offset - 1 : offset);// Check whether the offset is not at the end of file
 168                 IRegion line = document.getLineInformationOfOffset (adjustedOffset);            // Get the start and the length of the line
 169
 170                 start = line.getOffset ();                                                                      // Get the start of the line
 171                 end = findStringStart (document, start, offset);
 172
 173                 IPreferenceStore preferenceStore = PHPeclipsePlugin.getDefault().getPreferenceStore();
 174                 length = end - start;
 175
 176                 if (preferenceStore.getBoolean (PreferenceConstants.EDITOR_SPACES_FOR_TABS)) {  // Indentation with spaces only
 177                         if (length > 0) {
 178                   indentation = String.format ("%" + length + "s", "");
 179                 }
 180                 }
 181                 else {                                                                                                                                                  // Indentation with tabs
 182                         if (length > 0) {
 183                                 int spaces;
 184                                 int tabs;
 185                                 int tabWidth = preferenceStore.getInt (PreferenceConstants.EDITOR_TAB_WIDTH);
 186
 187                                 tabs   = length / tabWidth;
 188                                 spaces = length % tabWidth;
 189
 190                                 indentation  = new String (new char[tabs]).replace('\0', '\t');
 191                                 indentation += String.format ("%" + spaces + "s", "");
 192                         }
 193                 }
 194
 195                 return indentation;
 196         }
 197
 198         /**
 199          * Return the position of the string start (first occurrence of a quote or double quote)
 200          *
 201          * @param offset
 202          * @param start
 203          * @param document
 204          * @return
 205          */
 206         private int findStringStart(IDocument document, int offset, int end) throws BadLocationException {
 207                 while (offset < end) {
 208                         char c = document.getChar (offset);
 209
 210                         if ((c == '\'') || (c == '\"')) {
 211                                 return offset;
 212                         }
 213
 214                         offset++;
 215         }
 216
 217                 return end;
 218         }
 219
 220         /**
 221          *
 222          * @param string
 223          * @param indentation
 224          * @param delimiter
 225          * @return
 226          * @throws BadLocationException
 227          */
 228         private String getModifiedText (String string, String indentation, String delimiter)
 229                         throws BadLocationException {
 230                 return displayString(string, indentation, delimiter);
 231         }
 232
 233         /**
 234          *
 235          * @param document
 236          * @param command
 237          * @throws BadLocationException
 238          */
 239         private void javaStringIndentAfterNewLine (IDocument document, DocumentCommand command) throws BadLocationException {
 240                 ITypedRegion partition = TextUtilities.getPartition (document, fPartitioning, command.offset, false);
 241                 int offset = partition.getOffset();
 242                 int length = partition.getLength();
 243
 244                 if (command.offset == offset) {
 245                         // we are really just before the string partition -> feet the event
 246                         // through the java indenter
 247                         // new
 248                         // JavaAutoIndentStrategy(fPartitioning).customizeDocumentCommand(document,
 249                         // command);
 250                         return;
 251                 }
 252
 253                 if ((command.offset == offset + length) &&
 254                         (document.getChar (offset + length - 1) == '\'')) {
 255                         return;
 256                 }
 257
 258                 String indentation = getLineIndentation(document, command.offset);
 259                 String delimiter = TextUtilities.getDefaultLineDelimiter(document);
 260
 261                 IRegion line = document.getLineInformationOfOffset(offset);
 262                 String string = document.get (line.getOffset(),
 263                                                       offset - line.getOffset());               // Get the current line as string
 264 /*
 265                 if (string.trim().length() != 0) {
 266                         indentation += String.valueOf("\t\t"); //$NON-NLS-1$
 267                 }
 268 */
 269                 IPreferenceStore preferenceStore = PHPeclipsePlugin.getDefault ().getPreferenceStore();
 270
 271                 if (isLineDelimiter (document, command.text)) {
 272                         command.text = "\' ." + command.text + indentation + "\'"; //$NON-NLS-1$//$NON-NLS-2$
 273                 }
 274                 else if ((command.text.length() > 1) &&
 275                                  preferenceStore.getBoolean (PreferenceConstants.EDITOR_ESCAPE_STRINGS_SQ)) {
 276                         command.text = getModifiedText(command.text, indentation, delimiter);
 277         }
 278         }
 279
 280         /**
 281          *
 282          * @return
 283          */
 284         private boolean isSmartMode() {
 285                 IWorkbenchPage page = PHPeclipsePlugin.getActivePage();
 286
 287                 if (page != null) {
 288                         IEditorPart part = page.getActiveEditor();
 289
 290                         if (part instanceof ITextEditorExtension3) {
 291                                 ITextEditorExtension3 extension = (ITextEditorExtension3) part;
 292                                 return extension.getInsertMode() == ITextEditorExtension3.SMART_INSERT;
 293                         }
 294                 }
 295
 296                 return false;
 297         }
 298
 299         /*
 300          * @see org.eclipse.jface.text.IAutoIndentStrategy#customizeDocumentCommand(IDocument,
 301          *      DocumentCommand)
 302          */
 303         public void customizeDocumentCommand(IDocument document, DocumentCommand command) {
 304                 try {
 305                         if ((command.length != 0) ||
 306                 (command.text == null)) {
 307                                 return;
 308             }
 309
 310                         IPreferenceStore preferenceStore = PHPeclipsePlugin.getDefault().getPreferenceStore();
 311
 312                         if (preferenceStore.getBoolean (PreferenceConstants.EDITOR_WRAP_STRINGS_SQ) && isSmartMode()) {
 313                                 javaStringIndentAfterNewLine(document, command);
 314             }
 315
 316                 } catch (BadLocationException e) {
 317                 }
 318         }
 319 }