JSUnaryOperatorNode.java

/**
 * This file Copyright (c) 2005-2008 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */
package com.aptana.ide.editor.js.parsing.nodes;

import com.aptana.ide.io.SourceWriter;
import com.aptana.ide.lexer.Lexeme;

/**
 * @author Kevin Lindsey
 */
public class JSUnaryOperatorNode extends JSParseNode
{
	/**
	 * JSUnaryOperatorNode
	 * 
	 * @param typeIndex
	 * @param startLexeme
	 */
	public JSUnaryOperatorNode(int typeIndex, Lexeme startLexeme)
	{
		super(typeIndex, startLexeme);
	}

	/**
	 * @see com.aptana.ide.editor.js.parsing.nodes.JSParseNode#getSource(com.aptana.ide.io.SourceWriter)
	 */
	public void getSource(SourceWriter writer)
	{
		switch (this.getTypeIndex())
		{
			case JSParseNodeTypes.GROUP:
				JSParseNode operand = (JSParseNode) this.getChild(0);
				
				writer.print("("); //$NON-NLS-1$
				operand.getSource(writer);
				writer.print(")"); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.RETURN:
				writer.print("return"); //$NON-NLS-1$
				
				if (this.getChildCount() > 0)
				{
					operand = (JSParseNode) this.getChild(0);
				
					if (operand.isEmpty() == false)
					{
						writer.print(" "); //$NON-NLS-1$
						operand.getSource(writer);
					}
				}
				break;
				
			case JSParseNodeTypes.TYPEOF:
				operand = (JSParseNode) this.getChild(0);
				
				writer.print("typeof"); //$NON-NLS-1$
				
				if (operand.getTypeIndex() != JSParseNodeTypes.GROUP)
				{
					writer.print(" "); //$NON-NLS-1$
				}
				
				operand.getSource(writer);
				break;
			
			case JSParseNodeTypes.DELETE:
				this.getSourceCommon(writer, "delete", false, true); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.LOGICAL_NOT:
				this.getSourceCommon(writer, "!", false, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.THROW:
				this.getSourceCommon(writer, "throw", false, true); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.VOID:
				this.getSourceCommon(writer, "void", false, true); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.BITWISE_NOT:
				this.getSourceCommon(writer, "~", false, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.NEGATE:
				this.getSourceCommon(writer, "-", false, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.POSITIVE:
				this.getSourceCommon(writer, "+", false, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.POST_DECREMENT:
				this.getSourceCommon(writer, "--", true, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.POST_INCREMENT:
				this.getSourceCommon(writer, "++", true, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.PRE_DECREMENT:
				this.getSourceCommon(writer, "--", false, false); //$NON-NLS-1$
				break;
				
			case JSParseNodeTypes.PRE_INCREMENT:
				this.getSourceCommon(writer, "++", false, false); //$NON-NLS-1$
				break;

			default:
				break;
		}
	}
	
	/**
	 * convenience code for writing most of the binary operator types
	 *
	 * @param writer
	 */
	private void getSourceCommon(SourceWriter writer, String symbol, boolean symbolAfter, boolean useSpace)
	{
		JSParseNode operand = (JSParseNode) this.getChild(0);
		
		if (symbolAfter)
		{
			operand.getSource(writer);

			if (useSpace)
			{
				writer.print(" "); //$NON-NLS-1$
			}

			writer.print(symbol);
		}
		else
		{
			writer.print(symbol);

			if (useSpace)
			{
				writer.print(" "); //$NON-NLS-1$
			}

			operand.getSource(writer);
		}
	}
}