MozOpacityCSSProperty.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 Eclipse Public Licensed 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.
 * 
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 */
package com.aptana.ide.editor.css.validator.properties;

import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssNumber;
import org.w3c.css.values.CssValue;

/**
 * -moz-opacity property implementation.
 * @author Denis Denisenko
 */
public class MozOpacityCSSProperty extends PlugableCSSProperty
{

    /**
     * Property name.
     */
    private static final String PROPERTY_NAME = "-moz-opacity"; //$NON-NLS-1$
    
    /**
     * Opacity validator.
     * @author Denis Denisenko
     */
    private static class OpacityValidator implements CSSValueValidator
    {

        /**
          * {@inheritDoc}
          */
        public boolean canValidate(CssValue value)
        {
            return value instanceof CssNumber;
        }

        /**
          * {@inheritDoc}
          */
        public boolean isValid(CssValue value)
        {
            if (!(value instanceof CssNumber))
            {
                throw new IllegalArgumentException("Value " + value + " can not be validated"); //$NON-NLS-1$ //$NON-NLS-2$
            }
            
            float fValue = ((CssNumber) value).getValue();
            return fValue >= 0f && fValue <= 1.0f;
        }
        
    }
    
    /**
     * Static validator.
     */
    private static final OpacityValidator VALIDATOR = new OpacityValidator();
    
    /**
     * MozOpacityCSSProperty constructor.
     */
    public MozOpacityCSSProperty()
    {
        super(PROPERTY_NAME);
    }

    /**
     * MozOpacityCSSProperty constructor.
     * 
     * @param context - context.
     * @param expression - expression to create property from.
     * @param check - whether to check property value.
     * 
     * @throws InvalidParamException IF expression is invalid
     */
    public MozOpacityCSSProperty(
            ApplContext context, CssExpression expression, boolean check)
            throws InvalidParamException
    {
        super(PROPERTY_NAME, new Class[]{CssNumber.class}, null,
                new CSSValueValidator[]{VALIDATOR}, context, expression,
                check);
    }

    /**
     * MozOpacityCSSProperty constructor.
     * 
     * @param context - context.
     * @param expression - expression to create property from. 
     * 
     * @throws InvalidParamException IF expression is invalid
     */
    public MozOpacityCSSProperty(String propertyName, Class[] types,
            CSSValueTypeConverter[] converters, CSSValueValidator[] validators,
            ApplContext context, CssExpression expression)
            throws InvalidParamException
    {
        this(context, expression, false);
    }
}