/*******************************************************************************
* Copyright (c) 2000, 2005 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.rubypeople.rdt.internal.ui.viewsupport;
import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.action.IStatusLineManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.rubypeople.rdt.core.IRubyElement;
import org.rubypeople.rdt.internal.corext.util.Messages;
import org.rubypeople.rdt.internal.ui.RubyUIMessages;
import org.rubypeople.rdt.ui.RubyElementLabels;
/**
* Add the <code>StatusBarUpdater</code> to your ViewPart to have the statusbar
* describing the selected elements.
*/
public class StatusBarUpdater implements ISelectionChangedListener {
private final long LABEL_FLAGS= RubyElementLabels.DEFAULT_QUALIFIED | RubyElementLabels.ROOT_POST_QUALIFIED | RubyElementLabels.APPEND_ROOT_PATH | RubyElementLabels.M_PARAMETER_NAMES;
private IStatusLineManager fStatusLineManager;
public StatusBarUpdater(IStatusLineManager statusLineManager) {
fStatusLineManager= statusLineManager;
}
/*
* @see ISelectionChangedListener#selectionChanged
*/
public void selectionChanged(SelectionChangedEvent event) {
String statusBarMessage= formatMessage(event.getSelection());
fStatusLineManager.setMessage(statusBarMessage);
}
protected String formatMessage(ISelection sel) {
if (sel instanceof IStructuredSelection && !sel.isEmpty()) {
IStructuredSelection selection= (IStructuredSelection) sel;
int nElements= selection.size();
if (nElements > 1) {
return Messages.format(RubyUIMessages.StatusBarUpdater_num_elements_selected, String.valueOf(nElements));
} else {
Object elem= selection.getFirstElement();
if (elem instanceof IRubyElement) {
return formatRubyElementMessage((IRubyElement) elem);
} else if (elem instanceof IResource) {
return formatResourceMessage((IResource) elem);
}
}
}
return ""; //$NON-NLS-1$
}
private String formatRubyElementMessage(IRubyElement element) {
return RubyElementLabels.getElementLabel(element, LABEL_FLAGS);
}
private String formatResourceMessage(IResource element) {
IContainer parent= element.getParent();
if (parent != null && parent.getType() != IResource.ROOT)
return element.getName() + RubyElementLabels.CONCAT_STRING + parent.getFullPath().makeRelative().toString();
else
return element.getName();
}
}