TextHoverInformationProvider.java

/******************************************************************************* 
 * Copyright (c) 2009-2011 Red Hat, Inc. 
 * Distributed under license by Red Hat, Inc. All rights reserved. 
 * This program is 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: 
 * Red Hat, Inc. - initial API and implementation 
 ******************************************************************************/
package org.jboss.tools.common.text.xml.info;

import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextHover;
import org.eclipse.jface.text.ITextHoverExtension2;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.information.IInformationProvider;
import org.eclipse.jface.text.information.IInformationProviderExtension;
import org.eclipse.jface.text.information.IInformationProviderExtension2;

/**
 * 
 * @author Victor Rubezhny
 *
 */
public class TextHoverInformationProvider implements IInformationProvider, IInformationProviderExtension, IInformationProviderExtension2 {
	private ITextHover fTextHover;

	public TextHoverInformationProvider(ITextHover hover) {
		fTextHover = hover;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.jface.text.information.IInformationProvider#getInformation(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
	 */
	public String getInformation(ITextViewer textViewer, IRegion subject) {
		return (String) getInformation2(textViewer, subject);
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.jface.text.information.IInformationProviderExtension#getInformation2(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion)
	 */
	public Object getInformation2(ITextViewer textViewer, IRegion subject) {
		return (fTextHover instanceof ITextHoverExtension2 ?
				((ITextHoverExtension2)fTextHover).getHoverInfo2(textViewer, subject) :
				fTextHover.getHoverInfo(textViewer, subject));
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.jface.text.information.IInformationProviderExtension2#getInformationPresenterControlCreator()
	 */
	public IInformationControlCreator getInformationPresenterControlCreator() {
		return null;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.jface.text.information.IInformationProvider#getSubject(org.eclipse.jface.text.ITextViewer, int)
	 */
	public IRegion getSubject(ITextViewer textViewer, int offset) {
		return fTextHover.getHoverRegion(textViewer, offset);
	}
}