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/*******************************************************************************
* Copyright (c) 2010 Mohamadou Nassourou 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:
* Mohamadou Nassourou - initial API and implementation
*******************************************************************************/
package org.eclipse.vex.core.internal.css;
import java.text.MessageFormat;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.vex.core.internal.VEXCorePlugin;
import org.eclipse.vex.core.provisional.dom.BaseNodeVisitorWithResult;
import org.eclipse.vex.core.provisional.dom.IElement;
import org.eclipse.vex.core.provisional.dom.INode;
import org.w3c.css.sac.LexicalUnit;
/**
* @author Mohamadou Nassourou
*/
public class BackgroundImageProperty extends AbstractProperty {
public static final String DEFAULT = null;
public BackgroundImageProperty() {
super(CSS.BACKGROUND_IMAGE);
}
public Object calculate(final LexicalUnit lexicalUnit, final Styles parentStyles, final Styles styles, final INode node) {
if (lexicalUnit == null) {
return DEFAULT;
}
switch (lexicalUnit.getLexicalUnitType()) {
case LexicalUnit.SAC_STRING_VALUE:
return lexicalUnit.getStringValue();
case LexicalUnit.SAC_ATTR:
return node.accept(new BaseNodeVisitorWithResult<Object>(DEFAULT) {
@Override
public Object visit(final IElement element) {
final String attributeValue = element.getAttributeValue(lexicalUnit.getStringValue());
if (attributeValue != null) {
return attributeValue;
}
return DEFAULT;
}
});
default:
VEXCorePlugin
.getInstance()
.getLog()
.log(new Status(IStatus.WARNING, VEXCorePlugin.ID, MessageFormat.format("Unsupported lexical unit type in ''background-image: {0}'' (type: {1})", lexicalUnit.toString(),
lexicalUnit.getLexicalUnitType())));
return DEFAULT;
}
}
}
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