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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 import net.sourceforge.phpeclipse.ui.WebUI;
  16
  17 import org.eclipse.jface.preference.IPreferenceStore;
  18 import org.eclipse.jface.text.BadLocationException;
  19 import org.eclipse.jface.text.DefaultIndentLineAutoEditStrategy;
  20 import org.eclipse.jface.text.DocumentCommand;
  21 import org.eclipse.jface.text.IDocument;
  22 import org.eclipse.jface.text.IRegion;
  23 import org.eclipse.jface.text.ITypedRegion;
  24 import org.eclipse.jface.text.TextUtilities;
  25 import org.eclipse.ui.IEditorPart;
  26 import org.eclipse.ui.IWorkbenchPage;
  27 import org.eclipse.ui.texteditor.ITextEditorExtension3;
  28
  29 /**
  30  * Auto indent strategy for java strings
  31  */
  32 public class JavaStringAutoIndentStrategyDQ extends
  33                 DefaultIndentLineAutoEditStrategy {
  34
  35         private String fPartitioning;
  36
  37         /**
  38          * The input string doesn't contain any line delimiter.
  39          *
  40          * @param inputString
  41          *            the given input string
  42          * @return the displayable string.
  43          */
  44         private String displayString(String inputString, String indentation,
  45                         String delimiter) {
  46
  47                 int length = inputString.length();
  48                 StringBuffer buffer = new StringBuffer(length);
  49                 java.util.StringTokenizer tokenizer = new java.util.StringTokenizer(
  50                                 inputString, "\n\r", true); //$NON-NLS-1$
  51                 while (tokenizer.hasMoreTokens()) {
  52
  53                         String token = tokenizer.nextToken();
  54                         if (token.equals("\r")) { //$NON-NLS-1$
  55                                 buffer.append("\\r"); //$NON-NLS-1$
  56                                 if (tokenizer.hasMoreTokens()) {
  57                                         token = tokenizer.nextToken();
  58                                         if (token.equals("\n")) { //$NON-NLS-1$
  59                                                 buffer.append("\\n"); //$NON-NLS-1$
  60                                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  61                                                 buffer.append(indentation);
  62                                                 buffer.append("\""); //$NON-NLS-1$
  63                                                 continue;
  64                                         } else {
  65                                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  66                                                 buffer.append(indentation);
  67                                                 buffer.append("\""); //$NON-NLS-1$
  68                                         }
  69                                 } else {
  70                                         continue;
  71                                 }
  72                         } else if (token.equals("\n")) { //$NON-NLS-1$
  73                                 buffer.append("\\n"); //$NON-NLS-1$
  74                                 buffer.append("\" . " + delimiter); //$NON-NLS-1$
  75                                 buffer.append(indentation);
  76                                 buffer.append("\""); //$NON-NLS-1$
  77                                 continue;
  78                         }
  79
  80                         StringBuffer tokenBuffer = new StringBuffer();
  81                         for (int i = 0; i < token.length(); i++) {
  82                                 char c = token.charAt(i);
  83                                 switch (c) {
  84                                 case '\r':
  85                                         tokenBuffer.append("\\r"); //$NON-NLS-1$
  86                                         break;
  87                                 case '\n':
  88                                         tokenBuffer.append("\\n"); //$NON-NLS-1$
  89                                         break;
  90                                 case '\b':
  91                                         tokenBuffer.append("\\b"); //$NON-NLS-1$
  92                                         break;
  93                                 case '\t':
  94                                         // keep tabs verbatim
  95                                         tokenBuffer.append("\t"); //$NON-NLS-1$
  96                                         break;
  97                                 case '\f':
  98                                         tokenBuffer.append("\\f"); //$NON-NLS-1$
  99                                         break;
 100                                 case '\"':
 101                                         tokenBuffer.append("\\\""); //$NON-NLS-1$
 102                                         break;
 103                                 case '\'':
 104                                         tokenBuffer.append("\\'"); //$NON-NLS-1$
 105                                         break;
 106                                 case '\\':
 107                                         tokenBuffer.append("\\\\"); //$NON-NLS-1$
 108                                         break;
 109                                 default:
 110                                         tokenBuffer.append(c);
 111                                 }
 112                         }
 113                         buffer.append(tokenBuffer);
 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 JavaStringAutoIndentStrategyDQ(String partitioning) {
 126                 super();
 127                 fPartitioning = partitioning;
 128         }
 129
 130         private boolean isLineDelimiter(IDocument document, String text) {
 131                 String[] delimiters = document.getLegalLineDelimiters();
 132                 if (delimiters != null)
 133                         return TextUtilities.equals(delimiters, text) > -1;
 134                 return false;
 135         }
 136
 137         private String getLineIndentation(IDocument document, int offset)
 138                         throws BadLocationException {
 139
 140                 // find start of line
 141                 int adjustedOffset = (offset == document.getLength() ? offset - 1
 142                                 : offset);
 143                 IRegion line = document.getLineInformationOfOffset(adjustedOffset);
 144                 int start = line.getOffset();
 145
 146                 // find white spaces
 147                 int end = findEndOfWhiteSpace(document, start, offset);
 148
 149                 return document.get(start, end - start);
 150         }
 151
 152         private String getModifiedText(String string, String indentation,
 153                         String delimiter) throws BadLocationException {
 154                 return displayString(string, indentation, delimiter);
 155         }
 156
 157         private void javaStringIndentAfterNewLine(IDocument document,
 158                         DocumentCommand command) throws BadLocationException {
 159
 160                 ITypedRegion partition = TextUtilities.getPartition(document,
 161                                 fPartitioning, command.offset, false);
 162                 int offset = partition.getOffset();
 163                 int length = partition.getLength();
 164
 165                 if (command.offset == offset) {
 166                         // we are really just before the string partition -> feet the event
 167                         // through the java indenter
 168                         // new
 169                         // JavaAutoIndentStrategy(fPartitioning).customizeDocumentCommand(document,
 170                         // command);
 171                         return;
 172                 }
 173
 174                 if (command.offset == offset + length
 175                                 && document.getChar(offset + length - 1) == '\"')
 176                         return;
 177
 178                 String indentation = getLineIndentation(document, command.offset);
 179                 String delimiter = TextUtilities.getDefaultLineDelimiter(document);
 180
 181                 IRegion line = document.getLineInformationOfOffset(offset);
 182                 String string = document.get(line.getOffset(), offset
 183                                 - line.getOffset());
 184                 if (string.trim().length() != 0)
 185                         indentation += String.valueOf("\t\t"); //$NON-NLS-1$
 186
 187                 IPreferenceStore preferenceStore = WebUI.getDefault()
 188                                 .getPreferenceStore();
 189                 if (isLineDelimiter(document, command.text))
 190                         command.text = "\" ." + command.text + indentation + "\""; //$NON-NLS-1$//$NON-NLS-2$
 191                 else if (command.text.length() > 1
 192                                 && preferenceStore
 193                                                 .getBoolean(PreferenceConstants.EDITOR_ESCAPE_STRINGS_DQ))
 194                         command.text = getModifiedText(command.text, indentation, delimiter);
 195         }
 196
 197         private boolean isSmartMode() {
 198                 IWorkbenchPage page = WebUI.getActivePage();
 199                 if (page != null) {
 200                         IEditorPart part = page.getActiveEditor();
 201                         if (part instanceof ITextEditorExtension3) {
 202                                 ITextEditorExtension3 extension = (ITextEditorExtension3) part;
 203                                 return extension.getInsertMode() == ITextEditorExtension3.SMART_INSERT;
 204                         }
 205                 }
 206                 return false;
 207         }
 208
 209         /*
 210          * @see org.eclipse.jface.text.IAutoIndentStrategy#customizeDocumentCommand(IDocument,
 211          *      DocumentCommand)
 212          */
 213         public void customizeDocumentCommand(IDocument document,
 214                         DocumentCommand command) {
 215                 try {
 216                         if (command.length != 0 || command.text == null)
 217                                 return;
 218
 219                         IPreferenceStore preferenceStore = WebUI.getDefault()
 220                                         .getPreferenceStore();
 221
 222                         if (preferenceStore
 223                                         .getBoolean(PreferenceConstants.EDITOR_WRAP_STRINGS_DQ)
 224                                         && isSmartMode())
 225                                 javaStringIndentAfterNewLine(document, command);
 226
 227                 } catch (BadLocationException e) {
 228                 }
 229         }
 230 }