/*
 * #%L
 * SciJava Common shared library for SciJava software.
 * %%
 * Copyright (C) 2009 - 2017 Board of Regents of the University of
 * Wisconsin-Madison, Broad Institute of MIT and Harvard, Max Planck
 * Institute of Molecular Cell Biology and Genetics, University of
 * Konstanz, and KNIME GmbH.
 * %%
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */
package org.scijava.ui.console;

import java.util.LinkedList;

import org.scijava.Context;
import org.scijava.console.AbstractConsoleArgument;
import org.scijava.console.ConsoleArgument;
import org.scijava.console.ConsoleService;
import org.scijava.plugin.Parameter;
import org.scijava.plugin.Plugin;
import org.scijava.ui.UIService;

/**
 * Handles the {@code --headless} argument to signal that no UI will be opened
 * and the enclosing {@link Context} will not be used after the
 * {@link ConsoleService} argument processing is complete.
 *
 * @author Mark Hiner
 */
@Plugin(type = ConsoleArgument.class)
public class HeadlessArgument extends AbstractConsoleArgument {

	@Parameter(required = false)
	private UIService uiService;

	// -- Constructor --

	public HeadlessArgument() {
		super(1, "--headless");
	}

	// -- ConsoleArgument methods --

	@Override
	public void handle(final LinkedList<String> args) {
		if (!supports(args)) return;

		args.removeFirst(); // --headless

		uiService.setHeadless(true);
	}
	// -- Typed methods --

	@Override
	public boolean supports(final LinkedList<String> args) {
		return uiService != null && super.supports(args);
	}

}

@@ -2636,16 +2636,17 @@
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 %09// -- T
@@ -2786,11 +2786,10 @@
 gs);%0A%09%7D%0A
-%0A
 %7D%0A

tweak whitespace