/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.internal;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.preference.PreferenceStore;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
/**
* An overlaying preference store.
*/
public class OverlayPreferenceStore implements IPreferenceStore {
public static final class TypeDescriptor {
private TypeDescriptor() {
// nothing to do
}
}
public static final TypeDescriptor BOOLEAN= new TypeDescriptor();
public static final TypeDescriptor DOUBLE= new TypeDescriptor();
public static final TypeDescriptor FLOAT= new TypeDescriptor();
public static final TypeDescriptor INT= new TypeDescriptor();
public static final TypeDescriptor LONG= new TypeDescriptor();
public static final TypeDescriptor STRING= new TypeDescriptor();
public static class OverlayKey {
TypeDescriptor fDescriptor;
String fKey;
public OverlayKey(TypeDescriptor descriptor, String key) {
fDescriptor= descriptor;
fKey= key;
}
}
private class PropertyListener implements IPropertyChangeListener {
/*
* @see IPropertyChangeListener#propertyChange(PropertyChangeEvent)
*/
public void propertyChange(PropertyChangeEvent event) {
OverlayKey key= findOverlayKey(event.getProperty());
if (key != null)
propagateProperty(fParent, key, fStore);
}
}
private IPreferenceStore fParent;
private IPreferenceStore fStore;
private OverlayKey[] fOverlayKeys;
private PropertyListener fPropertyListener;
public OverlayPreferenceStore(IPreferenceStore parent, OverlayKey[] overlayKeys) {
fParent= parent;
fOverlayKeys= overlayKeys;
fStore= new PreferenceStore();
}
private OverlayKey findOverlayKey(String key) {
for (int i= 0; i < fOverlayKeys.length; i++) {
if (fOverlayKeys[i].fKey.equals(key))
return fOverlayKeys[i];
}
return null;
}
private boolean covers(String key) {
return (findOverlayKey(key) != null);
}
private void propagateProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target) {
if (orgin.isDefault(key.fKey)) {
if (!target.isDefault(key.fKey))
target.setToDefault(key.fKey);
return;
}
TypeDescriptor d= key.fDescriptor;
if (BOOLEAN == d) {
boolean originValue= orgin.getBoolean(key.fKey);
boolean targetValue= target.getBoolean(key.fKey);
if (targetValue != originValue)
target.setValue(key.fKey, originValue);
} else if (DOUBLE == d) {
double originValue= orgin.getDouble(key.fKey);
double targetValue= target.getDouble(key.fKey);
if (targetValue != originValue)
target.setValue(key.fKey, originValue);
} else if (FLOAT == d) {
float originValue= orgin.getFloat(key.fKey);
float targetValue= target.getFloat(key.fKey);
if (targetValue != originValue)
target.setValue(key.fKey, originValue);
} else if (INT == d) {
int originValue= orgin.getInt(key.fKey);
int targetValue= target.getInt(key.fKey);
if (targetValue != originValue)
target.setValue(key.fKey, originValue);
} else if (LONG == d) {
long originValue= orgin.getLong(key.fKey);
long targetValue= target.getLong(key.fKey);
if (targetValue != originValue)
target.setValue(key.fKey, originValue);
} else if (STRING == d) {
String originValue= orgin.getString(key.fKey);
String targetValue= target.getString(key.fKey);
if (targetValue != null && originValue != null && !targetValue.equals(originValue))
target.setValue(key.fKey, originValue);
}
}
public void propagate() {
for (int i= 0; i < fOverlayKeys.length; i++)
propagateProperty(fStore, fOverlayKeys[i], fParent);
}
private void loadProperty(IPreferenceStore orgin, OverlayKey key, IPreferenceStore target, boolean forceInitialization) {
TypeDescriptor d= key.fDescriptor;
if (BOOLEAN == d) {
if (forceInitialization)
target.setValue(key.fKey, true);
target.setValue(key.fKey, orgin.getBoolean(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultBoolean(key.fKey));
} else if (DOUBLE == d) {
if (forceInitialization)
target.setValue(key.fKey, 1.0D);
target.setValue(key.fKey, orgin.getDouble(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultDouble(key.fKey));
} else if (FLOAT == d) {
if (forceInitialization)
target.setValue(key.fKey, 1.0F);
target.setValue(key.fKey, orgin.getFloat(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultFloat(key.fKey));
} else if (INT == d) {
if (forceInitialization)
target.setValue(key.fKey, 1);
target.setValue(key.fKey, orgin.getInt(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultInt(key.fKey));
} else if (LONG == d) {
if (forceInitialization)
target.setValue(key.fKey, 1L);
target.setValue(key.fKey, orgin.getLong(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultLong(key.fKey));
} else if (STRING == d) {
if (forceInitialization)
target.setValue(key.fKey, "1"); //$NON-NLS-1$
target.setValue(key.fKey, orgin.getString(key.fKey));
target.setDefault(key.fKey, orgin.getDefaultString(key.fKey));
}
}
public void load() {
for (int i= 0; i < fOverlayKeys.length; i++)
loadProperty(fParent, fOverlayKeys[i], fStore, true);
}
public void loadDefaults() {
for (int i= 0; i < fOverlayKeys.length; i++)
setToDefault(fOverlayKeys[i].fKey);
}
public void start() {
if (fPropertyListener == null) {
fPropertyListener= new PropertyListener();
fParent.addPropertyChangeListener(fPropertyListener);
}
}
public void stop() {
if (fPropertyListener != null) {
fParent.removePropertyChangeListener(fPropertyListener);
fPropertyListener= null;
}
}
/*
* @see IPreferenceStore#addPropertyChangeListener(IPropertyChangeListener)
*/
public void addPropertyChangeListener(IPropertyChangeListener listener) {
fStore.addPropertyChangeListener(listener);
}
/*
* @see IPreferenceStore#removePropertyChangeListener(IPropertyChangeListener)
*/
public void removePropertyChangeListener(IPropertyChangeListener listener) {
fStore.removePropertyChangeListener(listener);
}
/*
* @see IPreferenceStore#firePropertyChangeEvent(String, Object, Object)
*/
public void firePropertyChangeEvent(String name, Object oldValue, Object newValue) {
fStore.firePropertyChangeEvent(name, oldValue, newValue);
}
/*
* @see IPreferenceStore#contains(String)
*/
public boolean contains(String name) {
return fStore.contains(name);
}
/*
* @see IPreferenceStore#getBoolean(String)
*/
public boolean getBoolean(String name) {
return fStore.getBoolean(name);
}
/*
* @see IPreferenceStore#getDefaultBoolean(String)
*/
public boolean getDefaultBoolean(String name) {
return fStore.getDefaultBoolean(name);
}
/*
* @see IPreferenceStore#getDefaultDouble(String)
*/
public double getDefaultDouble(String name) {
return fStore.getDefaultDouble(name);
}
/*
* @see IPreferenceStore#getDefaultFloat(String)
*/
public float getDefaultFloat(String name) {
return fStore.getDefaultFloat(name);
}
/*
* @see IPreferenceStore#getDefaultInt(String)
*/
public int getDefaultInt(String name) {
return fStore.getDefaultInt(name);
}
/*
* @see IPreferenceStore#getDefaultLong(String)
*/
public long getDefaultLong(String name) {
return fStore.getDefaultLong(name);
}
/*
* @see IPreferenceStore#getDefaultString(String)
*/
public String getDefaultString(String name) {
return fStore.getDefaultString(name);
}
/*
* @see IPreferenceStore#getDouble(String)
*/
public double getDouble(String name) {
return fStore.getDouble(name);
}
/*
* @see IPreferenceStore#getFloat(String)
*/
public float getFloat(String name) {
return fStore.getFloat(name);
}
/*
* @see IPreferenceStore#getInt(String)
*/
public int getInt(String name) {
return fStore.getInt(name);
}
/*
* @see IPreferenceStore#getLong(String)
*/
public long getLong(String name) {
return fStore.getLong(name);
}
/*
* @see IPreferenceStore#getString(String)
*/
public String getString(String name) {
return fStore.getString(name);
}
/*
* @see IPreferenceStore#isDefault(String)
*/
public boolean isDefault(String name) {
return fStore.isDefault(name);
}
/*
* @see IPreferenceStore#needsSaving()
*/
public boolean needsSaving() {
return fStore.needsSaving();
}
/*
* @see IPreferenceStore#putValue(String, String)
*/
public void putValue(String name, String value) {
if (covers(name))
fStore.putValue(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, double)
*/
public void setDefault(String name, double value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, float)
*/
public void setDefault(String name, float value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, int)
*/
public void setDefault(String name, int value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, long)
*/
public void setDefault(String name, long value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, String)
*/
public void setDefault(String name, String value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setDefault(String, boolean)
*/
public void setDefault(String name, boolean value) {
if (covers(name))
fStore.setDefault(name, value);
}
/*
* @see IPreferenceStore#setToDefault(String)
*/
public void setToDefault(String name) {
fStore.setToDefault(name);
}
/*
* @see IPreferenceStore#setValue(String, double)
*/
public void setValue(String name, double value) {
if (covers(name))
fStore.setValue(name, value);
}
/*
* @see IPreferenceStore#setValue(String, float)
*/
public void setValue(String name, float value) {
if (covers(name))
fStore.setValue(name, value);
}
/*
* @see IPreferenceStore#setValue(String, int)
*/
public void setValue(String name, int value) {
if (covers(name))
fStore.setValue(name, value);
}
/*
* @see IPreferenceStore#setValue(String, long)
*/
public void setValue(String name, long value) {
if (covers(name))
fStore.setValue(name, value);
}
/*
* @see IPreferenceStore#setValue(String, String)
*/
public void setValue(String name, String value) {
if (covers(name))
fStore.setValue(name, value);
}
/*
* @see IPreferenceStore#setValue(String, boolean)
*/
public void setValue(String name, boolean value) {
if (covers(name))
fStore.setValue(name, value);
}
}