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   1 /*
   2  * (c) Copyright IBM Corp. 2000, 2001.
   3  * All Rights Reserved.
   4  */
   5
   6 package net.sourceforge.phpdt.internal.ui.preferences;
   7
   8 import org.eclipse.jface.preference.IPreferenceStore;
   9 import org.eclipse.jface.preference.PreferenceStore;
  10 import org.eclipse.jface.util.IPropertyChangeListener;
  11 import org.eclipse.jface.util.PropertyChangeEvent;
  12
  13 /**
  14  * An overlaying preference store.
  15  */
  16 public class OverlayPreferenceStore  implements IPreferenceStore {
  17
  18
  19         public static final class TypeDescriptor {
  20                 private TypeDescriptor() {
  21                 }
  22         };
  23
  24         public static final TypeDescriptor BOOLEAN= new TypeDescriptor();
  25         public static final TypeDescriptor DOUBLE= new TypeDescriptor();
  26         public static final TypeDescriptor FLOAT= new TypeDescriptor();
  27         public static final TypeDescriptor INT= new TypeDescriptor();
  28         public static final TypeDescriptor LONG= new TypeDescriptor();
  29         public static final TypeDescriptor STRING= new TypeDescriptor();
  30
  31         public static class OverlayKey {
  32
  33                 TypeDescriptor fDescriptor;
  34                 String fKey;
  35
  36                 public OverlayKey(TypeDescriptor descriptor, String key) {
  37                         fDescriptor= descriptor;
  38                         fKey= key;
  39                 }
  40         };
  41
  42         private class PropertyListener implements IPropertyChangeListener {
  43
  44                 /*
  45                  * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
  46                  */
  47                 public void propertyChange(PropertyChangeEvent event) {
  48                         OverlayKey key= findOverlayKey(event.getProperty());
  49                         if (key != null)
  50                                 propagateProperty(fParent, key, fStore);
  51                 }
  52         };
  53
  54
  55         private IPreferenceStore fParent;
  56         private IPreferenceStore fStore;
  57         private OverlayKey[] fOverlayKeys;
  58
  59         private PropertyListener fPropertyListener;
  60
  61
  62         public OverlayPreferenceStore(IPreferenceStore parent, OverlayKey[] overlayKeys) {
  63                 fParent= parent;
  64                 fOverlayKeys= overlayKeys;
  65                 fStore= new PreferenceStore();
  66         }
  67
  68         private OverlayKey findOverlayKey(String key) {
  69                 for (int i= 0; i < fOverlayKeys.length; i++) {
  70                         if (fOverlayKeys[i].fKey.equals(key))
  71                                 return fOverlayKeys[i];
  72                 }
  73                 return null;
  74         }
  75
  76         private boolean covers(String key) {
  77                 return (findOverlayKey(key) != null);
  78         }
  79
  80         private void propagateProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target) {
  81
  82                 if (orgin.isDefault(key.fKey)) {
  83                         if (!target.isDefault(key.fKey))
  84                                 target.setToDefault(key.fKey);
  85                         return;
  86                 }
  87
  88                 TypeDescriptor d= key.fDescriptor;
  89                 if (BOOLEAN == d) {
  90
  91                         boolean originValue= orgin.getBoolean(key.fKey);
  92                         boolean targetValue= target.getBoolean(key.fKey);
  93                         if (targetValue != originValue)
  94                                 target.setValue(key.fKey, originValue);
  95
  96                 } else if (DOUBLE == d) {
  97
  98                         double originValue= orgin.getDouble(key.fKey);
  99                         double targetValue= target.getDouble(key.fKey);
 100                         if (targetValue != originValue)
 101                                 target.setValue(key.fKey, originValue);
 102
 103                 } else if (FLOAT == d) {
 104
 105                         float originValue= orgin.getFloat(key.fKey);
 106                         float targetValue= target.getFloat(key.fKey);
 107                         if (targetValue != originValue)
 108                                 target.setValue(key.fKey, originValue);
 109
 110                 } else if (INT == d) {
 111
 112                         int originValue= orgin.getInt(key.fKey);
 113                         int targetValue= target.getInt(key.fKey);
 114                         if (targetValue != originValue)
 115                                 target.setValue(key.fKey, originValue);
 116
 117                 } else if (LONG == d) {
 118
 119                         long originValue= orgin.getLong(key.fKey);
 120                         long targetValue= target.getLong(key.fKey);
 121                         if (targetValue != originValue)
 122                                 target.setValue(key.fKey, originValue);
 123
 124                 } else if (STRING == d) {
 125
 126                         String originValue= orgin.getString(key.fKey);
 127                         String targetValue= target.getString(key.fKey);
 128                         if (targetValue != null && originValue != null && !targetValue.equals(originValue))
 129                                 target.setValue(key.fKey, originValue);
 130
 131                 }
 132         }
 133
 134         public void propagate() {
 135                 for (int i= 0; i < fOverlayKeys.length; i++)
 136                         propagateProperty(fStore, fOverlayKeys[i], fParent);
 137         }
 138
 139         private void loadProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target, boolean forceInitialization) {
 140                 TypeDescriptor d= key.fDescriptor;
 141                 if (BOOLEAN == d) {
 142
 143                         if (forceInitialization)
 144                                 target.setValue(key.fKey, true);
 145                         target.setValue(key.fKey, orgin.getBoolean(key.fKey));
 146                         target.setDefault(key.fKey, orgin.getDefaultBoolean(key.fKey));
 147
 148                 } else if (DOUBLE == d) {
 149
 150                         if (forceInitialization)
 151                                 target.setValue(key.fKey, 1.0D);
 152                         target.setValue(key.fKey, orgin.getDouble(key.fKey));
 153                         target.setDefault(key.fKey, orgin.getDefaultDouble(key.fKey));
 154
 155                 } else if (FLOAT == d) {
 156
 157                         if (forceInitialization)
 158                                 target.setValue(key.fKey, 1.0F);
 159                         target.setValue(key.fKey, orgin.getFloat(key.fKey));
 160                         target.setDefault(key.fKey, orgin.getDefaultFloat(key.fKey));
 161
 162                 } else if (INT == d) {
 163
 164                         if (forceInitialization)
 165                                 target.setValue(key.fKey, 1);
 166                         target.setValue(key.fKey, orgin.getInt(key.fKey));
 167                         target.setDefault(key.fKey, orgin.getDefaultInt(key.fKey));
 168
 169                 } else if (LONG == d) {
 170
 171                         if (forceInitialization)
 172                                 target.setValue(key.fKey, 1L);
 173                         target.setValue(key.fKey, orgin.getLong(key.fKey));
 174                         target.setDefault(key.fKey, orgin.getDefaultLong(key.fKey));
 175
 176                 } else if (STRING == d) {
 177
 178                         if (forceInitialization)
 179                                 target.setValue(key.fKey, "1"); //$NON-NLS-1$
 180                         target.setValue(key.fKey, orgin.getString(key.fKey));
 181                         target.setDefault(key.fKey, orgin.getDefaultString(key.fKey));
 182
 183                 }
 184         }
 185
 186         public void load() {
 187                 for (int i= 0; i < fOverlayKeys.length; i++)
 188                         loadProperty(fParent, fOverlayKeys[i], fStore, true);
 189         }
 190
 191         public void loadDefaults() {
 192                 for (int i= 0; i < fOverlayKeys.length; i++)
 193                         setToDefault(fOverlayKeys[i].fKey);
 194         }
 195
 196         public void start() {
 197                 if (fPropertyListener == null) {
 198                         fPropertyListener= new PropertyListener();
 199                         fParent.addPropertyChangeListener(fPropertyListener);
 200                 }
 201         }
 202
 203         public void stop() {
 204                 if (fPropertyListener != null)  {
 205                         fParent.removePropertyChangeListener(fPropertyListener);
 206                         fPropertyListener= null;
 207                 }
 208         }
 209
 210         /*
 211          * @see IPreferenceStore#addPropertyChangeListener(IPropertyChangeListener)
 212          */
 213         public void addPropertyChangeListener(IPropertyChangeListener listener) {
 214                 fStore.addPropertyChangeListener(listener);
 215         }
 216
 217         /*
 218          * @see IPreferenceStore#removePropertyChangeListener(IPropertyChangeListener)
 219          */
 220         public void removePropertyChangeListener(IPropertyChangeListener listener) {
 221                 fStore.removePropertyChangeListener(listener);
 222         }
 223
 224         /*
 225          * @see IPreferenceStore#firePropertyChangeEvent(String, Object, Object)
 226          */
 227         public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
 228                 fStore.firePropertyChangeEvent(name, oldValue, newValue);
 229         }
 230
 231         /*
 232          * @see IPreferenceStore#contains(String)
 233          */
 234         public boolean contains(String name) {
 235                 return fStore.contains(name);
 236         }
 237
 238         /*
 239          * @see IPreferenceStore#getBoolean(String)
 240          */
 241         public boolean getBoolean(String name) {
 242                 return fStore.getBoolean(name);
 243         }
 244
 245         /*
 246          * @see IPreferenceStore#getDefaultBoolean(String)
 247          */
 248         public boolean getDefaultBoolean(String name) {
 249                 return fStore.getDefaultBoolean(name);
 250         }
 251
 252         /*
 253          * @see IPreferenceStore#getDefaultDouble(String)
 254          */
 255         public double getDefaultDouble(String name) {
 256                 return fStore.getDefaultDouble(name);
 257         }
 258
 259         /*
 260          * @see IPreferenceStore#getDefaultFloat(String)
 261          */
 262         public float getDefaultFloat(String name) {
 263                 return fStore.getDefaultFloat(name);
 264         }
 265
 266         /*
 267          * @see IPreferenceStore#getDefaultInt(String)
 268          */
 269         public int getDefaultInt(String name) {
 270                 return fStore.getDefaultInt(name);
 271         }
 272
 273         /*
 274          * @see IPreferenceStore#getDefaultLong(String)
 275          */
 276         public long getDefaultLong(String name) {
 277                 return fStore.getDefaultLong(name);
 278         }
 279
 280         /*
 281          * @see IPreferenceStore#getDefaultString(String)
 282          */
 283         public String getDefaultString(String name) {
 284                 return fStore.getDefaultString(name);
 285         }
 286
 287         /*
 288          * @see IPreferenceStore#getDouble(String)
 289          */
 290         public double getDouble(String name) {
 291                 return fStore.getDouble(name);
 292         }
 293
 294         /*
 295          * @see IPreferenceStore#getFloat(String)
 296          */
 297         public float getFloat(String name) {
 298                 return fStore.getFloat(name);
 299         }
 300
 301         /*
 302          * @see IPreferenceStore#getInt(String)
 303          */
 304         public int getInt(String name) {
 305                 return fStore.getInt(name);
 306         }
 307
 308         /*
 309          * @see IPreferenceStore#getLong(String)
 310          */
 311         public long getLong(String name) {
 312                 return fStore.getLong(name);
 313         }
 314
 315         /*
 316          * @see IPreferenceStore#getString(String)
 317          */
 318         public String getString(String name) {
 319                 return fStore.getString(name);
 320         }
 321
 322         /*
 323          * @see IPreferenceStore#isDefault(String)
 324          */
 325         public boolean isDefault(String name) {
 326                 return fStore.isDefault(name);
 327         }
 328
 329         /*
 330          * @see IPreferenceStore#needsSaving()
 331          */
 332         public boolean needsSaving() {
 333                 return fStore.needsSaving();
 334         }
 335
 336         /*
 337          * @see IPreferenceStore#putValue(String, String)
 338          */
 339         public void putValue(String name, String value) {
 340                 if (covers(name))
 341                         fStore.putValue(name, value);
 342         }
 343
 344         /*
 345          * @see IPreferenceStore#setDefault(String, double)
 346          */
 347         public void setDefault(String name, double value) {
 348                 if (covers(name))
 349                         fStore.setDefault(name, value);
 350         }
 351
 352         /*
 353          * @see IPreferenceStore#setDefault(String, float)
 354          */
 355         public void setDefault(String name, float value) {
 356                 if (covers(name))
 357                         fStore.setDefault(name, value);
 358         }
 359
 360         /*
 361          * @see IPreferenceStore#setDefault(String, int)
 362          */
 363         public void setDefault(String name, int value) {
 364                 if (covers(name))
 365                         fStore.setDefault(name, value);
 366         }
 367
 368         /*
 369          * @see IPreferenceStore#setDefault(String, long)
 370          */
 371         public void setDefault(String name, long value) {
 372                 if (covers(name))
 373                         fStore.setDefault(name, value);
 374         }
 375
 376         /*
 377          * @see IPreferenceStore#setDefault(String, String)
 378          */
 379         public void setDefault(String name, String value) {
 380                 if (covers(name))
 381                         fStore.setDefault(name, value);
 382         }
 383
 384         /*
 385          * @see IPreferenceStore#setDefault(String, boolean)
 386          */
 387         public void setDefault(String name, boolean value) {
 388                 if (covers(name))
 389                         fStore.setDefault(name, value);
 390         }
 391
 392         /*
 393          * @see IPreferenceStore#setToDefault(String)
 394          */
 395         public void setToDefault(String name) {
 396                 fStore.setToDefault(name);
 397         }
 398
 399         /*
 400          * @see IPreferenceStore#setValue(String, double)
 401          */
 402         public void setValue(String name, double value) {
 403                 if (covers(name))
 404                         fStore.setValue(name, value);
 405         }
 406
 407         /*
 408          * @see IPreferenceStore#setValue(String, float)
 409          */
 410         public void setValue(String name, float value) {
 411                 if (covers(name))
 412                         fStore.setValue(name, value);
 413         }
 414
 415         /*
 416          * @see IPreferenceStore#setValue(String, int)
 417          */
 418         public void setValue(String name, int value) {
 419                 if (covers(name))
 420                         fStore.setValue(name, value);
 421         }
 422
 423         /*
 424          * @see IPreferenceStore#setValue(String, long)
 425          */
 426         public void setValue(String name, long value) {
 427                 if (covers(name))
 428                         fStore.setValue(name, value);
 429         }
 430
 431         /*
 432          * @see IPreferenceStore#setValue(String, String)
 433          */
 434         public void setValue(String name, String value) {
 435                 if (covers(name))
 436                         fStore.setValue(name, value);
 437         }
 438
 439         /*
 440          * @see IPreferenceStore#setValue(String, boolean)
 441          */
 442         public void setValue(String name, boolean value) {
 443                 if (covers(name))
 444                         fStore.setValue(name, value);
 445         }
 446 }