net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpeclipse/ui/text/source/DefaultSourceViewerConfiguration.java

   1 /*
   2  * Copyright (c) 2002-2004 Widespace, OU 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://solareclipse.sourceforge.net/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     Igor Malinin - initial contribution
  10  *
  11  * $Id: DefaultSourceViewerConfiguration.java,v 1.2 2006-10-21 23:13:54 pombredanne Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.ui.text.source;
  15
  16 import org.eclipse.jface.preference.IPreferenceStore;
  17 import org.eclipse.jface.text.source.ISourceViewer;
  18 import org.eclipse.jface.text.source.SourceViewerConfiguration;
  19
  20 /**
  21  * @author Igor Malinin
  22  */
  23 public class DefaultSourceViewerConfiguration extends SourceViewerConfiguration {
  24
  25         /** Preference key used to look up display tab width. */
  26         public static final String PREFERENCE_TAB_WIDTH = "net.sourceforge.phpeclipse.ui.editor.tabWidth"; //$NON-NLS-1$
  27
  28         /** Preference key for inserting spaces rather than tabs. */
  29         public static final String PREFERENCE_SPACES_FOR_TABS = "net.sourceforge.phpeclipse.ui.editor.spacesForTabs"; //$NON-NLS-1$
  30
  31         private IPreferenceStore store;
  32
  33         public DefaultSourceViewerConfiguration(IPreferenceStore store) {
  34                 this.store = store;
  35         }
  36
  37         /*
  38          * @see SourceViewerConfiguration#getIndentPrefixes(ISourceViewer, String)
  39          */
  40         public String[] getIndentPrefixes(ISourceViewer sourceViewer,
  41                         String contentType) {
  42                 // prefix[0] is either '\t' or ' ' x tabWidth, depending on useSpaces
  43
  44                 int tabWidth = store.getInt(PREFERENCE_TAB_WIDTH);
  45                 boolean useSpaces = store.getBoolean(PREFERENCE_SPACES_FOR_TABS);
  46
  47                 String[] prefixes = new String[tabWidth + 1];
  48
  49                 for (int i = 0; i <= tabWidth; i++) {
  50                         StringBuffer prefix = new StringBuffer(tabWidth - 1);
  51
  52                         if (useSpaces) {
  53                                 for (int j = 0; j + i < tabWidth; j++) {
  54                                         prefix.append(' ');
  55                                 }
  56
  57                                 if (i != 0) {
  58                                         prefix.append('\t');
  59                                 }
  60                         } else {
  61                                 for (int j = 0; j < i; j++) {
  62                                         prefix.append(' ');
  63                                 }
  64
  65                                 if (i != tabWidth) {
  66                                         prefix.append('\t');
  67                                 }
  68                         }
  69
  70                         prefixes[i] = prefix.toString();
  71                 }
  72
  73                 prefixes[tabWidth] = ""; //$NON-NLS-1$
  74
  75                 return prefixes;
  76         }
  77 }