/*******************************************************************************
 * Copyright (c) 2005, 2017 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
package org.eclipse.dltk.ui.formatter;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.dltk.core.DLTKContributionExtensionManager;
import org.eclipse.dltk.core.DLTKLanguageManager;
import org.eclipse.dltk.core.IDLTKLanguageToolkit;
import org.eclipse.dltk.core.IScriptProject;
import org.eclipse.dltk.ui.DLTKUIPlugin;

public class ScriptFormatterManager extends DLTKContributionExtensionManager {

	private static ScriptFormatterManager instance = null;

	public static synchronized ScriptFormatterManager getInstance() {
		if (instance == null) {
			instance = new ScriptFormatterManager();
		}
		return instance;
	}

	public static final String EXTPOINT = DLTKUIPlugin.PLUGIN_ID
			+ ".formatterFactory"; //$NON-NLS-1$

	@Override
	protected String getContributionElementName() {
		return "formatterFactory"; //$NON-NLS-1$
	}

	@Override
	protected String getExtensionPoint() {
		return EXTPOINT;
	}

	@Override
	protected boolean isValidContribution(Object object) {
		return object instanceof IScriptFormatterFactory
				&& ((IScriptFormatterFactory) object).isValid();
	}

	@Override
	protected boolean isNatureContribution(IConfigurationElement main) {
		return "engineContribution".equals(main.getName());
	}

	public static boolean hasFormatterFor(final String natureId) {
		return getInstance().hasContributions(natureId);
	}

	public static IScriptFormatterFactory getSelected(IScriptProject project) {
		final IDLTKLanguageToolkit toolkit = DLTKLanguageManager
				.getLanguageToolkit(project);
		return (IScriptFormatterFactory) getInstance().getSelectedContribution(
				project.getProject(), toolkit.getNatureId());
	}

	public static IScriptFormatterFactory getSelected(String natureId,
			IProject project) {
		return (IScriptFormatterFactory) getInstance().getSelectedContribution(
				project, natureId);
	}

}