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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
  12 package net.sourceforge.phpdt.internal.ui.preferences;
  13
  14 import org.eclipse.jface.preference.IPreferenceStore;
  15 import org.eclipse.jface.preference.PreferenceStore;
  16 //incastrix
  17 //import org.eclipse.jface.text.Assert;
  18 import org.eclipse.core.runtime.Assert;
  19 import org.eclipse.jface.util.IPropertyChangeListener;
  20 import org.eclipse.jface.util.PropertyChangeEvent;
  21
  22 /**
  23  * An overlaying preference store.
  24  */
  25 public class OverlayPreferenceStore implements IPreferenceStore {
  26
  27         public static final class TypeDescriptor {
  28                 private TypeDescriptor() {
  29                 }
  30         }
  31
  32         public static final TypeDescriptor BOOLEAN = new TypeDescriptor();
  33
  34         public static final TypeDescriptor DOUBLE = new TypeDescriptor();
  35
  36         public static final TypeDescriptor FLOAT = new TypeDescriptor();
  37
  38         public static final TypeDescriptor INT = new TypeDescriptor();
  39
  40         public static final TypeDescriptor LONG = new TypeDescriptor();
  41
  42         public static final TypeDescriptor STRING = new TypeDescriptor();
  43
  44         public static class OverlayKey {
  45
  46                 TypeDescriptor fDescriptor;
  47
  48                 String fKey;
  49
  50                 public OverlayKey(TypeDescriptor descriptor, String key) {
  51                         fDescriptor = descriptor;
  52                         fKey = key;
  53                 }
  54         }
  55
  56         private class PropertyListener implements IPropertyChangeListener {
  57
  58                 /*
  59                  * @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
  60                  */
  61                 public void propertyChange(PropertyChangeEvent event) {
  62                         OverlayKey key = findOverlayKey(event.getProperty());
  63                         if (key != null)
  64                                 propagateProperty(fParent, key, fStore);
  65                 }
  66         }
  67
  68         private IPreferenceStore fParent;
  69
  70         private IPreferenceStore fStore;
  71
  72         private OverlayKey[] fOverlayKeys;
  73
  74         private PropertyListener fPropertyListener;
  75
  76         private boolean fLoaded;
  77
  78         public OverlayPreferenceStore(IPreferenceStore parent,
  79                         OverlayKey[] overlayKeys) {
  80                 fParent = parent;
  81                 fOverlayKeys = overlayKeys;
  82                 fStore = new PreferenceStore();
  83         }
  84
  85         private OverlayKey findOverlayKey(String key) {
  86                 for (int i = 0; i < fOverlayKeys.length; i++) {
  87                         if (fOverlayKeys[i].fKey.equals(key))
  88                                 return fOverlayKeys[i];
  89                 }
  90                 return null;
  91         }
  92
  93         private boolean covers(String key) {
  94                 return (findOverlayKey(key) != null);
  95         }
  96
  97         private void propagateProperty(IPreferenceStore orgin, OverlayKey key,
  98                         IPreferenceStore target) {
  99
 100                 if (orgin.isDefault(key.fKey)) {
 101                         if (!target.isDefault(key.fKey))
 102                                 target.setToDefault(key.fKey);
 103                         return;
 104                 }
 105
 106                 TypeDescriptor d = key.fDescriptor;
 107                 if (BOOLEAN == d) {
 108
 109                         boolean originValue = orgin.getBoolean(key.fKey);
 110                         boolean targetValue = target.getBoolean(key.fKey);
 111                         if (targetValue != originValue)
 112                                 target.setValue(key.fKey, originValue);
 113
 114                 } else if (DOUBLE == d) {
 115
 116                         double originValue = orgin.getDouble(key.fKey);
 117                         double targetValue = target.getDouble(key.fKey);
 118                         if (targetValue != originValue)
 119                                 target.setValue(key.fKey, originValue);
 120
 121                 } else if (FLOAT == d) {
 122
 123                         float originValue = orgin.getFloat(key.fKey);
 124                         float targetValue = target.getFloat(key.fKey);
 125                         if (targetValue != originValue)
 126                                 target.setValue(key.fKey, originValue);
 127
 128                 } else if (INT == d) {
 129
 130                         int originValue = orgin.getInt(key.fKey);
 131                         int targetValue = target.getInt(key.fKey);
 132                         if (targetValue != originValue)
 133                                 target.setValue(key.fKey, originValue);
 134
 135                 } else if (LONG == d) {
 136
 137                         long originValue = orgin.getLong(key.fKey);
 138                         long targetValue = target.getLong(key.fKey);
 139                         if (targetValue != originValue)
 140                                 target.setValue(key.fKey, originValue);
 141
 142                 } else if (STRING == d) {
 143
 144                         String originValue = orgin.getString(key.fKey);
 145                         String targetValue = target.getString(key.fKey);
 146                         if (targetValue != null && originValue != null
 147                                         && !targetValue.equals(originValue))
 148                                 target.setValue(key.fKey, originValue);
 149
 150                 }
 151         }
 152
 153         public void propagate() {
 154                 for (int i = 0; i < fOverlayKeys.length; i++)
 155                         propagateProperty(fStore, fOverlayKeys[i], fParent);
 156         }
 157
 158         private void loadProperty(IPreferenceStore orgin, OverlayKey key,
 159                         IPreferenceStore target, boolean forceInitialization) {
 160                 TypeDescriptor d = key.fDescriptor;
 161                 if (BOOLEAN == d) {
 162
 163                         if (forceInitialization)
 164                                 target.setValue(key.fKey, true);
 165                         target.setValue(key.fKey, orgin.getBoolean(key.fKey));
 166                         target.setDefault(key.fKey, orgin.getDefaultBoolean(key.fKey));
 167
 168                 } else if (DOUBLE == d) {
 169
 170                         if (forceInitialization)
 171                                 target.setValue(key.fKey, 1.0D);
 172                         target.setValue(key.fKey, orgin.getDouble(key.fKey));
 173                         target.setDefault(key.fKey, orgin.getDefaultDouble(key.fKey));
 174
 175                 } else if (FLOAT == d) {
 176
 177                         if (forceInitialization)
 178                                 target.setValue(key.fKey, 1.0F);
 179                         target.setValue(key.fKey, orgin.getFloat(key.fKey));
 180                         target.setDefault(key.fKey, orgin.getDefaultFloat(key.fKey));
 181
 182                 } else if (INT == d) {
 183
 184                         if (forceInitialization)
 185                                 target.setValue(key.fKey, 1);
 186                         target.setValue(key.fKey, orgin.getInt(key.fKey));
 187                         target.setDefault(key.fKey, orgin.getDefaultInt(key.fKey));
 188
 189                 } else if (LONG == d) {
 190
 191                         if (forceInitialization)
 192                                 target.setValue(key.fKey, 1L);
 193                         target.setValue(key.fKey, orgin.getLong(key.fKey));
 194                         target.setDefault(key.fKey, orgin.getDefaultLong(key.fKey));
 195
 196                 } else if (STRING == d) {
 197
 198                         if (forceInitialization)
 199                                 target.setValue(key.fKey, "1"); //$NON-NLS-1$
 200                         target.setValue(key.fKey, orgin.getString(key.fKey));
 201                         target.setDefault(key.fKey, orgin.getDefaultString(key.fKey));
 202
 203                 }
 204         }
 205
 206         public void load() {
 207                 for (int i = 0; i < fOverlayKeys.length; i++)
 208                         loadProperty(fParent, fOverlayKeys[i], fStore, true);
 209
 210                 fLoaded = true;
 211
 212         }
 213
 214         public void loadDefaults() {
 215                 for (int i = 0; i < fOverlayKeys.length; i++)
 216                         setToDefault(fOverlayKeys[i].fKey);
 217         }
 218
 219         public void start() {
 220                 if (fPropertyListener == null) {
 221                         fPropertyListener = new PropertyListener();
 222                         fParent.addPropertyChangeListener(fPropertyListener);
 223                 }
 224         }
 225
 226         public void stop() {
 227                 if (fPropertyListener != null) {
 228                         fParent.removePropertyChangeListener(fPropertyListener);
 229                         fPropertyListener = null;
 230                 }
 231         }
 232
 233         /*
 234          * @see IPreferenceStore#addPropertyChangeListener(IPropertyChangeListener)
 235          */
 236         public void addPropertyChangeListener(IPropertyChangeListener listener) {
 237                 fStore.addPropertyChangeListener(listener);
 238         }
 239
 240         /*
 241          * @see IPreferenceStore#removePropertyChangeListener(IPropertyChangeListener)
 242          */
 243         public void removePropertyChangeListener(IPropertyChangeListener listener) {
 244                 fStore.removePropertyChangeListener(listener);
 245         }
 246
 247         /*
 248          * @see IPreferenceStore#firePropertyChangeEvent(String, Object, Object)
 249          */
 250         public void firePropertyChangeEvent(String name, Object oldValue,
 251                         Object newValue) {
 252                 fStore.firePropertyChangeEvent(name, oldValue, newValue);
 253         }
 254
 255         /*
 256          * @see IPreferenceStore#contains(String)
 257          */
 258         public boolean contains(String name) {
 259                 return fStore.contains(name);
 260         }
 261
 262         /*
 263          * @see IPreferenceStore#getBoolean(String)
 264          */
 265         public boolean getBoolean(String name) {
 266                 return fStore.getBoolean(name);
 267         }
 268
 269         /*
 270          * @see IPreferenceStore#getDefaultBoolean(String)
 271          */
 272         public boolean getDefaultBoolean(String name) {
 273                 return fStore.getDefaultBoolean(name);
 274         }
 275
 276         /*
 277          * @see IPreferenceStore#getDefaultDouble(String)
 278          */
 279         public double getDefaultDouble(String name) {
 280                 return fStore.getDefaultDouble(name);
 281         }
 282
 283         /*
 284          * @see IPreferenceStore#getDefaultFloat(String)
 285          */
 286         public float getDefaultFloat(String name) {
 287                 return fStore.getDefaultFloat(name);
 288         }
 289
 290         /*
 291          * @see IPreferenceStore#getDefaultInt(String)
 292          */
 293         public int getDefaultInt(String name) {
 294                 return fStore.getDefaultInt(name);
 295         }
 296
 297         /*
 298          * @see IPreferenceStore#getDefaultLong(String)
 299          */
 300         public long getDefaultLong(String name) {
 301                 return fStore.getDefaultLong(name);
 302         }
 303
 304         /*
 305          * @see IPreferenceStore#getDefaultString(String)
 306          */
 307         public String getDefaultString(String name) {
 308                 return fStore.getDefaultString(name);
 309         }
 310
 311         /*
 312          * @see IPreferenceStore#getDouble(String)
 313          */
 314         public double getDouble(String name) {
 315                 return fStore.getDouble(name);
 316         }
 317
 318         /*
 319          * @see IPreferenceStore#getFloat(String)
 320          */
 321         public float getFloat(String name) {
 322                 return fStore.getFloat(name);
 323         }
 324
 325         /*
 326          * @see IPreferenceStore#getInt(String)
 327          */
 328         public int getInt(String name) {
 329                 return fStore.getInt(name);
 330         }
 331
 332         /*
 333          * @see IPreferenceStore#getLong(String)
 334          */
 335         public long getLong(String name) {
 336                 return fStore.getLong(name);
 337         }
 338
 339         /*
 340          * @see IPreferenceStore#getString(String)
 341          */
 342         public String getString(String name) {
 343                 return fStore.getString(name);
 344         }
 345
 346         /*
 347          * @see IPreferenceStore#isDefault(String)
 348          */
 349         public boolean isDefault(String name) {
 350                 return fStore.isDefault(name);
 351         }
 352
 353         /*
 354          * @see IPreferenceStore#needsSaving()
 355          */
 356         public boolean needsSaving() {
 357                 return fStore.needsSaving();
 358         }
 359
 360         /*
 361          * @see IPreferenceStore#putValue(String, String)
 362          */
 363         public void putValue(String name, String value) {
 364                 if (covers(name))
 365                         fStore.putValue(name, value);
 366         }
 367
 368         /*
 369          * @see IPreferenceStore#setDefault(String, double)
 370          */
 371         public void setDefault(String name, double value) {
 372                 if (covers(name))
 373                         fStore.setDefault(name, value);
 374         }
 375
 376         /*
 377          * @see IPreferenceStore#setDefault(String, float)
 378          */
 379         public void setDefault(String name, float value) {
 380                 if (covers(name))
 381                         fStore.setDefault(name, value);
 382         }
 383
 384         /*
 385          * @see IPreferenceStore#setDefault(String, int)
 386          */
 387         public void setDefault(String name, int value) {
 388                 if (covers(name))
 389                         fStore.setDefault(name, value);
 390         }
 391
 392         /*
 393          * @see IPreferenceStore#setDefault(String, long)
 394          */
 395         public void setDefault(String name, long value) {
 396                 if (covers(name))
 397                         fStore.setDefault(name, value);
 398         }
 399
 400         /*
 401          * @see IPreferenceStore#setDefault(String, String)
 402          */
 403         public void setDefault(String name, String value) {
 404                 if (covers(name))
 405                         fStore.setDefault(name, value);
 406         }
 407
 408         /*
 409          * @see IPreferenceStore#setDefault(String, boolean)
 410          */
 411         public void setDefault(String name, boolean value) {
 412                 if (covers(name))
 413                         fStore.setDefault(name, value);
 414         }
 415
 416         /*
 417          * @see IPreferenceStore#setToDefault(String)
 418          */
 419         public void setToDefault(String name) {
 420                 fStore.setToDefault(name);
 421         }
 422
 423         /*
 424          * @see IPreferenceStore#setValue(String, double)
 425          */
 426         public void setValue(String name, double value) {
 427                 if (covers(name))
 428                         fStore.setValue(name, value);
 429         }
 430
 431         /*
 432          * @see IPreferenceStore#setValue(String, float)
 433          */
 434         public void setValue(String name, float value) {
 435                 if (covers(name))
 436                         fStore.setValue(name, value);
 437         }
 438
 439         /*
 440          * @see IPreferenceStore#setValue(String, int)
 441          */
 442         public void setValue(String name, int value) {
 443                 if (covers(name))
 444                         fStore.setValue(name, value);
 445         }
 446
 447         /*
 448          * @see IPreferenceStore#setValue(String, long)
 449          */
 450         public void setValue(String name, long value) {
 451                 if (covers(name))
 452                         fStore.setValue(name, value);
 453         }
 454
 455         /*
 456          * @see IPreferenceStore#setValue(String, String)
 457          */
 458         public void setValue(String name, String value) {
 459                 if (covers(name))
 460                         fStore.setValue(name, value);
 461         }
 462
 463         /*
 464          * @see IPreferenceStore#setValue(String, boolean)
 465          */
 466         public void setValue(String name, boolean value) {
 467                 if (covers(name))
 468                         fStore.setValue(name, value);
 469         }
 470
 471         /**
 472          * The keys to add to the list of overlay keys.
 473          * <p>
 474          * Note: This method must be called before {@link #load()} is called.
 475          * </p>
 476          *
 477          * @param keys
 478          * @since 3.0
 479          */
 480         public void addKeys(OverlayKey[] keys) {
 481                 Assert.isTrue(!fLoaded);
 482                 Assert.isNotNull(keys);
 483
 484                 int overlayKeysLength = fOverlayKeys.length;
 485                 OverlayKey[] result = new OverlayKey[keys.length + overlayKeysLength];
 486
 487                 for (int i = 0, length = overlayKeysLength; i < length; i++)
 488                         result[i] = fOverlayKeys[i];
 489
 490                 for (int i = 0, length = keys.length; i < length; i++)
 491                         result[overlayKeysLength + i] = keys[i];
 492
 493                 fOverlayKeys = result;
 494
 495                 if (fLoaded)
 496                         load();
 497         }
 498 }