/*******************************************************************************
* Copyright (c) 2008, 2014 Angelo Zerr and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
* IBM Corporation
*******************************************************************************/
package org.eclipse.e4.ui.css.swt.properties.converters;
import java.util.List;
import org.eclipse.e4.ui.css.core.dom.properties.Gradient;
import org.eclipse.e4.ui.css.core.dom.properties.converters.AbstractCSSValueConverter;
import org.eclipse.e4.ui.css.core.dom.properties.converters.ICSSValueConverter;
import org.eclipse.e4.ui.css.core.dom.properties.converters.ICSSValueConverterConfig;
import org.eclipse.e4.ui.css.core.engine.CSSEngine;
import org.eclipse.e4.ui.css.swt.helpers.CSSSWTColorHelper;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.w3c.dom.css.CSSPrimitiveValue;
import org.w3c.dom.css.CSSValue;
import org.w3c.dom.css.CSSValueList;
/**
* CSS Value converter to convert :
* <ul>
* <li>CSS Value to {@link Gradient}</li>.
* <li>{@link Gradient} to String CSS Value</li>
* </ul>
*/
public class CSSValueSWTGradientConverterImpl extends AbstractCSSValueConverter {
public static final ICSSValueConverter INSTANCE = new CSSValueSWTGradientConverterImpl();
public CSSValueSWTGradientConverterImpl() {
super(Gradient.class);
}
@Override
public Object convert(CSSValue value, CSSEngine engine, Object context) throws Exception {
if (value.getCssValueType() == CSSValue.CSS_VALUE_LIST) {
Display display = (context instanceof Display) ? (Display) context : null;
Gradient grad = CSSSWTColorHelper.getGradient((CSSValueList) value, display);
List<?> values = grad.getValues();
for (int i = 0; i < values.size(); i++) {
//Ensure all the colors are already converted and in the registry
//TODO see bug #278077
CSSPrimitiveValue prim = (CSSPrimitiveValue) values.get(i);
engine.convert(prim, Color.class, context);
}
return grad;
}
return null;
}
@Override
public String convert(Object value, CSSEngine engine, Object context,
ICSSValueConverterConfig config) throws Exception {
return null;
}
}