/*******************************************************************************
* Copyright (c) 2000, 2011 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.jdt.internal.ui.typehierarchy;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.ui.PlatformUI;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.internal.corext.util.Messages;
import org.eclipse.jdt.ui.JavaElementLabels;
import org.eclipse.jdt.internal.ui.IJavaHelpContextIds;
import org.eclipse.jdt.internal.ui.viewsupport.JavaElementImageProvider;
/**
* Action used for the type hierarchy forward / backward buttons
*/
public class HistoryAction extends Action {
private TypeHierarchyViewPart fViewPart;
private IJavaElement[] fElements;
public HistoryAction(TypeHierarchyViewPart viewPart, IJavaElement[] elements) {
super("", AS_RADIO_BUTTON); //$NON-NLS-1$
fViewPart= viewPart;
fElements= elements;
String elementName= getElementLabel(elements);
setText(elementName);
setImageDescriptor(getImageDescriptor(elements[0]));
setDescription(Messages.format(TypeHierarchyMessages.HistoryAction_description, elementName));
setToolTipText(Messages.format(TypeHierarchyMessages.HistoryAction_tooltip, elementName));
PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.HISTORY_ACTION);
}
private ImageDescriptor getImageDescriptor(IJavaElement elem) {
JavaElementImageProvider imageProvider= new JavaElementImageProvider();
ImageDescriptor desc= imageProvider.getBaseImageDescriptor(elem, 0);
imageProvider.dispose();
return desc;
}
/*
* @see Action#run()
*/
@Override
public void run() {
fViewPart.gotoHistoryEntry(fElements);
}
/**
* Fetches the label for the java element.
*
* @param element the java element
* @return the label for the java element
* @since 3.7
*/
static StyledString getSingleElementLabel(IJavaElement element) {
return JavaElementLabels.getStyledElementLabel(element, JavaElementLabels.ALL_POST_QUALIFIED | JavaElementLabels.COLORIZE | JavaElementLabels.P_COMPRESSED);
}
/**
* Fetches the label for all the java elements.
*
* @param elements the java elements
* @return the label for all the java elements
* @since 3.7
*/
static String getElementLabel(IJavaElement[] elements) {
switch (elements.length) {
case 0:
Assert.isTrue(false);
return null;
case 1:
return Messages.format(TypeHierarchyMessages.HistoryAction_inputElements_1,
new String[] { getShortLabel(elements[0]) });
case 2:
return Messages.format(TypeHierarchyMessages.HistoryAction_inputElements_2,
new String[] { getShortLabel(elements[0]), getShortLabel(elements[1]) });
default:
return Messages.format(TypeHierarchyMessages.HistoryAction_inputElements_more,
new String[] { getShortLabel(elements[0]), getShortLabel(elements[1]), getShortLabel(elements[2]) });
}
}
/**
* Fetches the short label for the java element.
*
* @param element the java element
* @return the short label for the java element
* @since 3.7
*/
static String getShortLabel(IJavaElement element) {
return JavaElementLabels.getElementLabel(element, JavaElementLabels.ALL_DEFAULT | JavaElementLabels.ALL_POST_QUALIFIED | JavaElementLabels.P_COMPRESSED);
}
}