net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/preferences/MembersOrderPreferenceCache.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 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.core.Flags;
  16 import net.sourceforge.phpdt.ui.PreferenceConstants;
  17
  18 import org.eclipse.jface.preference.IPreferenceStore;
  19 import org.eclipse.jface.util.IPropertyChangeListener;
  20 import org.eclipse.jface.util.PropertyChangeEvent;
  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_CATEGORIES= STATIC_METHODS_INDEX + 1;
  35
  36         private static final int PUBLIC_INDEX= 0;
  37         private static final int PRIVATE_INDEX= 1;
  38         private static final int PROTECTED_INDEX= 2;
  39         private static final int DEFAULT_INDEX= 3;
  40         private static final int N_VISIBILITIES= DEFAULT_INDEX + 1;
  41
  42         private int[] fCategoryOffsets= null;
  43
  44         private boolean fSortByVisibility;
  45         private int[] fVisibilityOffsets= null;
  46
  47         public MembersOrderPreferenceCache() {
  48                 fCategoryOffsets= null;
  49                 fSortByVisibility= PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.APPEARANCE_ENABLE_VISIBILITY_SORT_ORDER);
  50                 fVisibilityOffsets= null;
  51         }
  52
  53         public static boolean isMemberOrderProperty(String property) {
  54                 return PreferenceConstants.APPEARANCE_MEMBER_SORT_ORDER.equals(property)
  55                         || PreferenceConstants.APPEARANCE_VISIBILITY_SORT_ORDER.equals(property)
  56                         || PreferenceConstants.APPEARANCE_ENABLE_VISIBILITY_SORT_ORDER.equals(property);
  57         }
  58
  59         public void propertyChange(PropertyChangeEvent event) {
  60                 String property= event.getProperty();
  61
  62                 if (PreferenceConstants.APPEARANCE_MEMBER_SORT_ORDER.equals(property)) {
  63                         fCategoryOffsets= null;
  64                 } else if (PreferenceConstants.APPEARANCE_VISIBILITY_SORT_ORDER.equals(property)) {
  65                         fVisibilityOffsets= null;
  66                 } else if (PreferenceConstants.APPEARANCE_ENABLE_VISIBILITY_SORT_ORDER.equals(property)) {
  67                         fSortByVisibility= PreferenceConstants.getPreferenceStore().getBoolean(PreferenceConstants.APPEARANCE_ENABLE_VISIBILITY_SORT_ORDER);
  68                 }
  69         }
  70
  71         public int getCategoryIndex(int kind) {
  72                 if (fCategoryOffsets == null) {
  73                         fCategoryOffsets= getCategoryOffsets();
  74                 }
  75                 return fCategoryOffsets[kind];
  76         }
  77
  78         private int[] getCategoryOffsets() {
  79                 int[] offsets= new int[N_CATEGORIES];
  80                 IPreferenceStore store= PreferenceConstants.getPreferenceStore();
  81                 String key= PreferenceConstants.APPEARANCE_MEMBER_SORT_ORDER;
  82                 boolean success= fillCategoryOffsetsFromPreferenceString(store.getString(key), offsets);
  83                 if (!success) {
  84                         store.setToDefault(key);
  85                         fillCategoryOffsetsFromPreferenceString(store.getDefaultString(key), offsets);
  86                 }
  87                 return offsets;
  88         }
  89
  90         private boolean fillCategoryOffsetsFromPreferenceString(String str, int[] offsets) {
  91                 StringTokenizer tokenizer= new StringTokenizer(str, ","); //$NON-NLS-1$
  92                 int i= 0;
  93                 while (tokenizer.hasMoreTokens()) {
  94                         String token= tokenizer.nextToken().trim();
  95                         if ("T".equals(token)) { //$NON-NLS-1$
  96                                 offsets[TYPE_INDEX]= i++;
  97                         } else if ("M".equals(token)) { //$NON-NLS-1$
  98                                 offsets[METHOD_INDEX]= i++;
  99                         } else if ("F".equals(token)) { //$NON-NLS-1$
 100                                 offsets[FIELDS_INDEX]= i++;
 101                         } else if ("I".equals(token)) { //$NON-NLS-1$
 102                                 offsets[INIT_INDEX]= i++;
 103                         } else if ("SF".equals(token)) { //$NON-NLS-1$
 104                                 offsets[STATIC_FIELDS_INDEX]= i++;
 105                         } else if ("SI".equals(token)) { //$NON-NLS-1$
 106                                 offsets[STATIC_INIT_INDEX]= i++;
 107                         } else if ("SM".equals(token)) { //$NON-NLS-1$
 108                                 offsets[STATIC_METHODS_INDEX]= i++;
 109                         } else if ("C".equals(token)) { //$NON-NLS-1$
 110                                 offsets[CONSTRUCTORS_INDEX]= i++;
 111                         }
 112                 }
 113                 return i == N_CATEGORIES;
 114         }
 115
 116         public boolean isSortByVisibility() {
 117                 return fSortByVisibility;
 118         }
 119
 120
 121         public int getVisibilityIndex(int modifierFlags) {
 122                 if (fVisibilityOffsets == null) {
 123                         fVisibilityOffsets= getVisibilityOffsets();
 124                 }
 125                 int kind= DEFAULT_INDEX;
 126                 if (Flags.isPublic(modifierFlags)) {
 127                         kind= PUBLIC_INDEX;
 128                 } else if (Flags.isProtected(modifierFlags)) {
 129                         kind= PROTECTED_INDEX;
 130                 } else if (Flags.isPrivate(modifierFlags)) {
 131                         kind= PRIVATE_INDEX;
 132                 }
 133
 134                 return fVisibilityOffsets[kind];
 135         }
 136
 137         private int[] getVisibilityOffsets() {
 138                 int[] offsets= new int[N_VISIBILITIES];
 139                 IPreferenceStore store= PreferenceConstants.getPreferenceStore();
 140                 String key= PreferenceConstants.APPEARANCE_VISIBILITY_SORT_ORDER;
 141                 boolean success= fillVisibilityOffsetsFromPreferenceString(store.getString(key), offsets);
 142                 if (!success) {
 143                         store.setToDefault(key);
 144                         fillVisibilityOffsetsFromPreferenceString(store.getDefaultString(key), offsets);
 145                 }
 146                 return offsets;
 147         }
 148
 149         private boolean fillVisibilityOffsetsFromPreferenceString(String str, int[] offsets) {
 150                 StringTokenizer tokenizer= new StringTokenizer(str, ","); //$NON-NLS-1$
 151                 int i= 0;
 152                 while (tokenizer.hasMoreTokens()) {
 153                         String token= tokenizer.nextToken().trim();
 154                         if ("B".equals(token)) { //$NON-NLS-1$
 155                                 offsets[PUBLIC_INDEX]= i++;
 156                         } else if ("V".equals(token)) { //$NON-NLS-1$
 157                                 offsets[PRIVATE_INDEX]= i++;
 158                         } else if ("R".equals(token)) { //$NON-NLS-1$
 159                                 offsets[PROTECTED_INDEX]= i++;
 160                         } else if ("D".equals(token)) { //$NON-NLS-1$
 161                                 offsets[DEFAULT_INDEX]= i++;
 162                         }
 163                 }
 164                 return i == N_VISIBILITIES;
 165         }
 166
 167
 168 }