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