/*******************************************************************************
* Copyright (c) 2000, 2008 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.ltk.internal.ui.refactoring;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.LabelProvider;
class ChangeElementLabelProvider extends LabelProvider implements IFontProvider {
private Map fDescriptorImageMap= new HashMap();
public ChangeElementLabelProvider() {
}
public Image getImage(Object object) {
return manageImageDescriptor(((PreviewNode)object).getImageDescriptor());
}
public String getText(Object object) {
String text= ((PreviewNode)object).getText();
if (isDerived(object)) {
return Messages.format(RefactoringUIMessages.ChangeElementLabelProvider_derived, text);
} else {
return text;
}
}
public Font getFont(Object element) {
if (isDerived(element)) {
return JFaceResources.getFontRegistry().getItalic(JFaceResources.DIALOG_FONT);
} else {
return null;
}
}
private boolean isDerived(Object element) {
PreviewNode node= (PreviewNode)element;
return node.hasDerived();
}
public void dispose() {
for (Iterator iter= fDescriptorImageMap.values().iterator(); iter.hasNext(); ) {
Image image= (Image)iter.next();
image.dispose();
}
super.dispose();
}
private Image manageImageDescriptor(ImageDescriptor descriptor) {
Image image= (Image)fDescriptorImageMap.get(descriptor);
if (image == null) {
image= descriptor.createImage();
fDescriptorImageMap.put(descriptor, image);
}
return image;
}
}