/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.hibernate.eclipse.console.actions;

import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.IDocument;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.ITextEditor;

public class ClearHQLEditorAction extends EditorActionDelegate {
		
	/**
	 * Returns the document currently displayed in the editor, or <code>null</code> if none can be 
	 * obtained.
	 * 
	 * @return the current document or <code>null</code>
	 */
	private IDocument getDocument() {
		
		ITextEditor editor= getTextEditor();
		if (editor != null) {
			
			IDocumentProvider provider= editor.getDocumentProvider();
			IEditorInput input= editor.getEditorInput();
			if (provider != null && input != null)
				return provider.getDocument(input);
			
		}
		return null;
	}

	private ITextEditor getTextEditor() {
		if(editor instanceof ITextEditor) {
			return (ITextEditor) editor;
		}
		return null;
	}

	public void run(IAction action) {
		IDocument document = getDocument();
		if(document!=null) {
			document.set(""); //$NON-NLS-1$
		}
		
	}

	
}
