package org.gw4e.eclipse.handlers;

/*-
 * #%L
 * gw4e
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2017 gw4e-project
 * %%
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * #L%
 */

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IFile;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.HandlerUtil;
import org.gw4e.eclipse.facade.ResourceManager;
import org.gw4e.eclipse.wizard.convert.ConvertToFileCreationWizard;

/**
 * A Command handler to call GW4E Converter when selection fits
 * 
 * @see org.eclipse.core.commands.IHandler
 * @see org.eclipse.core.commands.AbstractHandler
 */
public class ConvertToHandler extends AbstractHandler {
	/**
	 * The constructor.
	 */
	public ConvertToHandler() {
	}

	/* (non-Javadoc)
	 * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
	 */
	public Object execute(ExecutionEvent event) throws ExecutionException {

		ISelection sel = HandlerUtil.getCurrentSelection(event);
		if (sel.isEmpty())
			return null;
		if (!(sel instanceof IStructuredSelection))
			return null;
		Object obj = ((IStructuredSelection) sel).getFirstElement();
		if (!(obj instanceof IFile))
			return null;
 
		try {
			ConvertToFileCreationWizard wizard = new ConvertToFileCreationWizard( );
			wizard.init(PlatformUI.getWorkbench(), (IStructuredSelection)sel);
			Shell activeShell = HandlerUtil.getActiveShell(event);
			if (activeShell==null) return null;
			WizardDialog dialog = new WizardDialog(activeShell,wizard);
			dialog.open();
		} catch (Exception e) {
			ResourceManager.logException(e);
		}
 
		return null;
	}
}