/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.reporting.engine.classic.core.style.css.selector;

import org.pentaho.reporting.engine.classic.core.style.css.namespaces.NamespaceCollection;
import org.w3c.css.sac.DescendantSelector;
import org.w3c.css.sac.Selector;
import org.w3c.css.sac.SimpleSelector;

import java.io.Serializable;

/**
 * Creation-Date: 30.11.2005, 15:38:58
 *
 * @author Thomas Morgner
 */
public class CSSDescendantSelector extends AbstractSelector implements DescendantSelector, Serializable {
  private Selector anchestorSelector;
  private SimpleSelector simpleSelector;
  private boolean childRelation;

  public CSSDescendantSelector( final SimpleSelector simpleSelector, final Selector anchestorSelector,
      final boolean childRelation ) {
    this.simpleSelector = simpleSelector;
    this.anchestorSelector = anchestorSelector;
    this.childRelation = childRelation;
  }

  /**
   * Returns the parent selector.
   */
  public Selector getAncestorSelector() {
    return anchestorSelector;
  }

  protected SelectorWeight createWeight() {
    if ( anchestorSelector instanceof CSSSelector == false || simpleSelector instanceof CSSSelector == false ) {
      throw new ClassCastException( "Invalid selector implementation!" );
    }
    CSSSelector anchestor = (CSSSelector) anchestorSelector;
    CSSSelector simple = (CSSSelector) simpleSelector;
    return new SelectorWeight( anchestor.getWeight(), simple.getWeight() );
  }

  /*
   * Returns the simple selector.
   */
  public SimpleSelector getSimpleSelector() {
    return simpleSelector;
  }

  /**
   * An integer indicating the type of <code>Selector</code>
   */
  public short getSelectorType() {
    if ( childRelation ) {
      return Selector.SAC_CHILD_SELECTOR;
    } else {
      return Selector.SAC_DESCENDANT_SELECTOR;
    }
  }

  public String print( final NamespaceCollection namespaces ) {
    final CSSSelector anchestor = (CSSSelector) anchestorSelector;
    final CSSSelector simple = (CSSSelector) simpleSelector;
    if ( childRelation ) {
      return anchestor.print( namespaces ) + " > " + simple.print( namespaces );
    }
    return anchestor.print( namespaces ) + " " + simple.print( namespaces );
  }
}