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/*******************************************************************************
* Copyright (c) 2004, 2008 John Krasnay 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:
* John Krasnay - initial API and implementation
*******************************************************************************/
package org.eclipse.vex.core.internal.css;
import org.eclipse.vex.core.dom.INode;
import org.w3c.css.sac.LexicalUnit;
/**
* The CSS white-space property.
*/
public class WhiteSpaceProperty extends AbstractProperty {
/**
* Class constructor.
*/
public WhiteSpaceProperty() {
super(CSS.WHITE_SPACE);
}
/**
*
*/
public Object calculate(final LexicalUnit lu, final Styles parentStyles, final Styles styles, final INode node) {
if (isWhiteSpace(lu)) {
return lu.getStringValue();
} else {
// not specified, "inherit", or some other value
if (parentStyles != null) {
return parentStyles.getWhiteSpace();
} else {
return CSS.NORMAL;
}
}
}
/**
* Returns true if the given lexical unit represents a white space value.
*
* @param lu
* LexicalUnit to check.
*/
public static boolean isWhiteSpace(final LexicalUnit lu) {
if (lu == null) {
return false;
} else if (lu.getLexicalUnitType() == LexicalUnit.SAC_IDENT) {
final String s = lu.getStringValue();
return s.equals(CSS.NORMAL) || s.equals(CSS.PRE) || s.equals(CSS.NOWRAP);
} else {
return false;
}
}
}
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