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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.preferences;
  12
  13 import java.util.StringTokenizer;
  14
  15 import net.sourceforge.phpdt.ui.PreferenceConstants;
  16
  17 import org.eclipse.jface.preference.IPreferenceStore;
  18 import org.eclipse.jface.util.IPropertyChangeListener;
  19 import org.eclipse.jface.util.PropertyChangeEvent;
  20
  21
  22 /**
  23   */
  24 public class MembersOrderPreferenceCache implements IPropertyChangeListener {
  25
  26         public static final int TYPE_INDEX= 0;
  27         public static final int CONSTRUCTORS_INDEX= 1;
  28         public static final int METHOD_INDEX= 2;
  29         public static final int FIELDS_INDEX= 3;
  30         public static final int INIT_INDEX= 4;
  31         public static final int STATIC_FIELDS_INDEX= 5;
  32         public static final int STATIC_INIT_INDEX= 6;
  33         public static final int STATIC_METHODS_INDEX= 7;
  34         public static final int N_ENTRIES= STATIC_METHODS_INDEX + 1;
  35
  36         private int[] fOffsets= null;
  37
  38         public void propertyChange(PropertyChangeEvent event) {
  39                 if (PreferenceConstants.APPEARANCE_MEMBER_SORT_ORDER.equals(event.getProperty())) {
  40                         fOffsets= null;
  41                 }
  42         }
  43
  44         public int getIndex(int kind) {
  45                 if (fOffsets == null) {
  46                         fOffsets= getOffsets();
  47                 }
  48                 return fOffsets[kind];
  49         }
  50
  51         private int[] getOffsets() {
  52                 int[] offsets= new int[N_ENTRIES];
  53                 IPreferenceStore store= PreferenceConstants.getPreferenceStore();
  54                 String key= PreferenceConstants.APPEARANCE_MEMBER_SORT_ORDER;
  55                 boolean success= fillOffsetsFromPreferenceString(store.getString(key), offsets);
  56                 if (!success) {
  57                         store.setToDefault(key);
  58                         fillOffsetsFromPreferenceString(store.getDefaultString(key), offsets);
  59                 }
  60                 return offsets;
  61         }
  62
  63         private boolean fillOffsetsFromPreferenceString(String str, int[] offsets) {
  64                 StringTokenizer tokenizer= new StringTokenizer(str, ","); //$NON-NLS-1$
  65                 int i= 0;
  66                 while (tokenizer.hasMoreTokens()) {
  67                         String token= tokenizer.nextToken().trim();
  68                         if ("T".equals(token)) { //$NON-NLS-1$
  69                                 offsets[TYPE_INDEX]= i++;
  70                         } else if ("M".equals(token)) { //$NON-NLS-1$
  71                                 offsets[METHOD_INDEX]= i++;
  72                         } else if ("F".equals(token)) { //$NON-NLS-1$
  73                                 offsets[FIELDS_INDEX]= i++;
  74                         } else if ("I".equals(token)) { //$NON-NLS-1$
  75                                 offsets[INIT_INDEX]= i++;
  76                         } else if ("SF".equals(token)) { //$NON-NLS-1$
  77                                 offsets[STATIC_FIELDS_INDEX]= i++;
  78                         } else if ("SI".equals(token)) { //$NON-NLS-1$
  79                                 offsets[STATIC_INIT_INDEX]= i++;
  80                         } else if ("SM".equals(token)) { //$NON-NLS-1$
  81                                 offsets[STATIC_METHODS_INDEX]= i++;
  82                         } else if ("C".equals(token)) { //$NON-NLS-1$
  83                                 offsets[CONSTRUCTORS_INDEX]= i++;
  84                         }
  85                 }
  86                 return i == N_ENTRIES;
  87         }
  88
  89
  90 }