org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/contributions/BarContentAssistProcessor.java

/*******************************************************************************
 * Copyright (c) 2016 Red Hat Inc. 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:
 * - Mickael Istria (Red Hat Inc.)
 *******************************************************************************/
package org.eclipse.ui.genericeditor.tests.contributions;

import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.contentassist.CompletionProposal;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.jface.text.contentassist.IContentAssistProcessor;
import org.eclipse.jface.text.contentassist.IContextInformation;
import org.eclipse.jface.text.contentassist.IContextInformationValidator;

public class BarContentAssistProcessor implements IContentAssistProcessor {

	public static final String PROPOSAL = "s are good for a beer.";

	@Override
	public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) {
		String text = viewer.getDocument().get();
		if (text.length() >= 3 && offset >= 3 && text.substring(offset - 3, offset).equals("bar")) {
			String message = PROPOSAL;
			CompletionProposal proposal = new CompletionProposal(message, offset, 0, message.length());
			return new ICompletionProposal[] { proposal };
		}
		return new ICompletionProposal[0];
	}

	@Override
	public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) {
		return null;
	}

	@Override
	public char[] getCompletionProposalAutoActivationCharacters() {
		return null;
	}

	@Override
	public char[] getContextInformationAutoActivationCharacters() {
		return null;
	}

	@Override
	public String getErrorMessage() {
		return null;
	}

	@Override
	public IContextInformationValidator getContextInformationValidator() {
		return null;
	}

}