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 1.1 2004-09-02 18:26:32 jsurfer 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 =
  27                 "net.sourceforge.phpeclipse.ui.editor.tabWidth"; //$NON-NLS-1$
  28
  29         /** Preference key for inserting spaces rather than tabs. */
  30         public static final String PREFERENCE_SPACES_FOR_TABS =
  31                 "net.sourceforge.phpeclipse.ui.editor.spacesForTabs"; //$NON-NLS-1$
  32
  33         private IPreferenceStore store;
  34
  35         public DefaultSourceViewerConfiguration(IPreferenceStore store) {
  36                 this.store = store;
  37         }
  38
  39         /*
  40          * @see SourceViewerConfiguration#getIndentPrefixes(ISourceViewer, String)
  41          */
  42         public String[] getIndentPrefixes(ISourceViewer sourceViewer,
  43                         String contentType) {
  44                 // prefix[0] is either '\t' or ' ' x tabWidth, depending on useSpaces
  45
  46                 int tabWidth = store.getInt(PREFERENCE_TAB_WIDTH);
  47                 boolean useSpaces = store.getBoolean(PREFERENCE_SPACES_FOR_TABS);
  48
  49                 String[] prefixes = new String[tabWidth + 1];
  50
  51                 for (int i = 0; i <= tabWidth; i++) {
  52                         StringBuffer prefix = new StringBuffer(tabWidth - 1);
  53
  54                         if (useSpaces) {
  55                                 for (int j = 0; j + i < tabWidth; j++) {
  56                                         prefix.append(' ');
  57                                 }
  58
  59                                 if (i != 0) {
  60                                         prefix.append('\t');
  61                                 }
  62                         } else {
  63                                 for (int j = 0; j < i; j++) {
  64                                         prefix.append(' ');
  65                                 }
  66
  67                                 if (i != tabWidth) {
  68                                         prefix.append('\t');
  69                                 }
  70                         }
  71
  72                         prefixes[i] = prefix.toString();
  73                 }
  74
  75                 prefixes[tabWidth] = ""; //$NON-NLS-1$
  76
  77                 return prefixes;
  78         }
  79 }