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 
12 package net.sourceforge.phpdt.internal.ui.text;
13 
14 import org.eclipse.core.runtime.Preferences;
15 import org.eclipse.jface.preference.IPreferenceStore;
16 import org.eclipse.jface.util.IPropertyChangeListener;
17 import org.eclipse.jface.util.ListenerList;
18 import org.eclipse.jface.util.PropertyChangeEvent;
19 
20 /**
21  * Adapts {@link org.eclipse.core.runtime.Preferences} to
22  * {@link org.eclipse.jface.preference.IPreferenceStore}
23  *
24  * @since 3.0
25  */
26 public class PreferencesAdapter implements IPreferenceStore {
27 
28 	/**
29 	 * Property change listener. Listens for events of type
30 	 * {@link org.eclipse.core.runtime.Preferences.PropertyChangeEvent} and
31 	 * fires a {@link org.eclipse.jface.util.PropertyChangeEvent} on the adapter
32 	 * with arguments from the received event.
33 	 */
34 	private class PropertyChangeListener implements
35 			Preferences.IPropertyChangeListener {
36 
37 		/*
38 		 * @see org.eclipse.core.runtime.Preferences.IPropertyChangeListener#propertyChange(org.eclipse.core.runtime.Preferences.PropertyChangeEvent)
39 		 */
propertyChange(Preferences.PropertyChangeEvent event)40 		public void propertyChange(Preferences.PropertyChangeEvent event) {
41 			firePropertyChangeEvent(event.getProperty(), event.getOldValue(),
42 					event.getNewValue());
43 		}
44 	}
45 
46 	/** Listeners on the adapter */
47 	private ListenerList fListeners = new ListenerList();
48 
49 	/** Listener on the adapted Preferences */
50 	private PropertyChangeListener fListener = new PropertyChangeListener();
51 
52 	/** Adapted Preferences */
53 	private Preferences fPreferences;
54 
55 	/** True iff no events should be forwarded */
56 	private boolean fSilent;
57 
58 	/**
59 	 * Initialize with empty Preferences.
60 	 */
PreferencesAdapter()61 	public PreferencesAdapter() {
62 		this(new Preferences());
63 	}
64 
65 	/**
66 	 * Initialize with the given Preferences.
67 	 *
68 	 * @param preferences
69 	 *            The preferences to wrap.
70 	 */
PreferencesAdapter(Preferences preferences)71 	public PreferencesAdapter(Preferences preferences) {
72 		fPreferences = preferences;
73 	}
74 
75 	/**
76 	 * {@inheritDoc}
77 	 */
addPropertyChangeListener(IPropertyChangeListener listener)78 	public void addPropertyChangeListener(IPropertyChangeListener listener) {
79 		if (fListeners.size() == 0)
80 			fPreferences.addPropertyChangeListener(fListener);
81 		fListeners.add(listener);
82 	}
83 
84 	/**
85 	 * {@inheritDoc}
86 	 */
removePropertyChangeListener(IPropertyChangeListener listener)87 	public void removePropertyChangeListener(IPropertyChangeListener listener) {
88 		fListeners.remove(listener);
89 		if (fListeners.size() == 0)
90 			fPreferences.removePropertyChangeListener(fListener);
91 	}
92 
93 	/**
94 	 * {@inheritDoc}
95 	 */
contains(String name)96 	public boolean contains(String name) {
97 		return fPreferences.contains(name);
98 	}
99 
100 	/**
101 	 * {@inheritDoc}
102 	 */
firePropertyChangeEvent(String name, Object oldValue, Object newValue)103 	public void firePropertyChangeEvent(String name, Object oldValue,
104 			Object newValue) {
105 		if (!fSilent) {
106 			PropertyChangeEvent event = new PropertyChangeEvent(this, name,
107 					oldValue, newValue);
108 			Object[] listeners = fListeners.getListeners();
109 			for (int i = 0; i < listeners.length; i++)
110 				((IPropertyChangeListener) listeners[i]).propertyChange(event);
111 		}
112 	}
113 
114 	/**
115 	 * {@inheritDoc}
116 	 */
getBoolean(String name)117 	public boolean getBoolean(String name) {
118 		return fPreferences.getBoolean(name);
119 	}
120 
121 	/**
122 	 * {@inheritDoc}
123 	 */
getDefaultBoolean(String name)124 	public boolean getDefaultBoolean(String name) {
125 		return fPreferences.getDefaultBoolean(name);
126 	}
127 
128 	/**
129 	 * {@inheritDoc}
130 	 */
getDefaultDouble(String name)131 	public double getDefaultDouble(String name) {
132 		return fPreferences.getDefaultDouble(name);
133 	}
134 
135 	/**
136 	 * {@inheritDoc}
137 	 */
getDefaultFloat(String name)138 	public float getDefaultFloat(String name) {
139 		return fPreferences.getDefaultFloat(name);
140 	}
141 
142 	/**
143 	 * {@inheritDoc}
144 	 */
getDefaultInt(String name)145 	public int getDefaultInt(String name) {
146 		return fPreferences.getDefaultInt(name);
147 	}
148 
149 	/**
150 	 * {@inheritDoc}
151 	 */
getDefaultLong(String name)152 	public long getDefaultLong(String name) {
153 		return fPreferences.getDefaultLong(name);
154 	}
155 
156 	/**
157 	 * {@inheritDoc}
158 	 */
getDefaultString(String name)159 	public String getDefaultString(String name) {
160 		return fPreferences.getDefaultString(name);
161 	}
162 
163 	/**
164 	 * {@inheritDoc}
165 	 */
getDouble(String name)166 	public double getDouble(String name) {
167 		return fPreferences.getDouble(name);
168 	}
169 
170 	/**
171 	 * {@inheritDoc}
172 	 */
getFloat(String name)173 	public float getFloat(String name) {
174 		return fPreferences.getFloat(name);
175 	}
176 
177 	/**
178 	 * {@inheritDoc}
179 	 */
getInt(String name)180 	public int getInt(String name) {
181 		return fPreferences.getInt(name);
182 	}
183 
184 	/**
185 	 * {@inheritDoc}
186 	 */
getLong(String name)187 	public long getLong(String name) {
188 		return fPreferences.getLong(name);
189 	}
190 
191 	/**
192 	 * {@inheritDoc}
193 	 */
getString(String name)194 	public String getString(String name) {
195 		return fPreferences.getString(name);
196 	}
197 
198 	/**
199 	 * {@inheritDoc}
200 	 */
isDefault(String name)201 	public boolean isDefault(String name) {
202 		return fPreferences.isDefault(name);
203 	}
204 
205 	/**
206 	 * {@inheritDoc}
207 	 */
needsSaving()208 	public boolean needsSaving() {
209 		return fPreferences.needsSaving();
210 	}
211 
212 	/**
213 	 * {@inheritDoc}
214 	 */
putValue(String name, String value)215 	public void putValue(String name, String value) {
216 		try {
217 			fSilent = true;
218 			fPreferences.setValue(name, value);
219 		} finally {
220 			fSilent = false;
221 		}
222 	}
223 
224 	/**
225 	 * {@inheritDoc}
226 	 */
setDefault(String name, double value)227 	public void setDefault(String name, double value) {
228 		fPreferences.setDefault(name, value);
229 	}
230 
231 	/**
232 	 * {@inheritDoc}
233 	 */
setDefault(String name, float value)234 	public void setDefault(String name, float value) {
235 		fPreferences.setDefault(name, value);
236 	}
237 
238 	/**
239 	 * {@inheritDoc}
240 	 */
setDefault(String name, int value)241 	public void setDefault(String name, int value) {
242 		fPreferences.setDefault(name, value);
243 	}
244 
245 	/**
246 	 * {@inheritDoc}
247 	 */
setDefault(String name, long value)248 	public void setDefault(String name, long value) {
249 		fPreferences.setDefault(name, value);
250 	}
251 
252 	/**
253 	 * {@inheritDoc}
254 	 */
setDefault(String name, String defaultObject)255 	public void setDefault(String name, String defaultObject) {
256 		fPreferences.setDefault(name, defaultObject);
257 	}
258 
259 	/**
260 	 * {@inheritDoc}
261 	 */
setDefault(String name, boolean value)262 	public void setDefault(String name, boolean value) {
263 		fPreferences.setDefault(name, value);
264 	}
265 
266 	/**
267 	 * {@inheritDoc}
268 	 */
setToDefault(String name)269 	public void setToDefault(String name) {
270 		fPreferences.setToDefault(name);
271 	}
272 
273 	/**
274 	 * {@inheritDoc}
275 	 */
setValue(String name, double value)276 	public void setValue(String name, double value) {
277 		fPreferences.setValue(name, value);
278 	}
279 
280 	/**
281 	 * {@inheritDoc}
282 	 */
setValue(String name, float value)283 	public void setValue(String name, float value) {
284 		fPreferences.setValue(name, value);
285 	}
286 
287 	/**
288 	 * {@inheritDoc}
289 	 */
setValue(String name, int value)290 	public void setValue(String name, int value) {
291 		fPreferences.setValue(name, value);
292 	}
293 
294 	/**
295 	 * {@inheritDoc}
296 	 */
setValue(String name, long value)297 	public void setValue(String name, long value) {
298 		fPreferences.setValue(name, value);
299 	}
300 
301 	/**
302 	 * {@inheritDoc}
303 	 */
setValue(String name, String value)304 	public void setValue(String name, String value) {
305 		fPreferences.setValue(name, value);
306 	}
307 
308 	/**
309 	 * {@inheritDoc}
310 	 */
setValue(String name, boolean value)311 	public void setValue(String name, boolean value) {
312 		fPreferences.setValue(name, value);
313 	}
314 }
315