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