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/*
* $Id: RepeatablePageMasterAlternatives.java,v 1.12 2003/03/06 13:42:41 jeremias Exp $
* ============================================================================
* The Apache Software License, Version 1.1
* ============================================================================
*
* Copyright (C) 1999-2003 The Apache Software Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modifica-
* tion, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by the Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "FOP" and "Apache Software Foundation" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache", nor may
* "Apache" appear in their name, without prior written permission of the
* Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
* DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ============================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of the Apache Software Foundation and was originally created by
* James Tauber <jtauber@jtauber.com>. For more information on the Apache
* Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.fo.pagination;
// Java
import java.util.ArrayList;
// XML
import org.xml.sax.Attributes;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.FOTreeVisitor;
import org.apache.fop.apps.FOPException;
/**
* A repeatable-page-master-alternatives formatting object.
* This contains a list of conditional-page-master-reference
* and the page master is found from the reference that
* matches the page number and emptyness.
*/
public class RepeatablePageMasterAlternatives extends FObj
implements SubSequenceSpecifier {
private static final int INFINITE = -1;
/**
* Max times this page master can be repeated.
* INFINITE is used for the unbounded case
*/
private int maximumRepeats;
private int numberConsumed = 0;
private ArrayList conditionalPageMasterRefs;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public RepeatablePageMasterAlternatives(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#handleAttrs(Attributes)
*/
public void handleAttrs(Attributes attlist) throws FOPException {
super.handleAttrs(attlist);
conditionalPageMasterRefs = new ArrayList();
if (parent.getName().equals("fo:page-sequence-master")) {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster)parent;
pageSequenceMaster.addSubsequenceSpecifier(this);
} else {
throw new FOPException("fo:repeatable-page-master-alternatives "
+ "must be child of fo:page-sequence-master, not "
+ parent.getName());
}
String mr = getProperty(PR_MAXIMUM_REPEATS).getString();
if (mr.equals("no-limit")) {
this.maximumRepeats = INFINITE;
} else {
try {
this.maximumRepeats = Integer.parseInt(mr);
if (this.maximumRepeats < 0) {
getLogger().debug("negative maximum-repeats: "
+ this.maximumRepeats);
this.maximumRepeats = 0;
}
} catch (NumberFormatException nfe) {
throw new FOPException("Invalid number for "
+ "'maximum-repeats' property");
}
}
}
/**
* Get the next matching page master from the conditional
* page master references.
* @see org.apache.fop.fo.pagination.SubSequenceSpecifier
*/
public String getNextPageMasterName(boolean isOddPage,
boolean isFirstPage,
boolean isBlankPage) {
if (maximumRepeats != INFINITE) {
if (numberConsumed < maximumRepeats) {
numberConsumed++;
} else {
return null;
}
}
for (int i = 0; i < conditionalPageMasterRefs.size(); i++) {
ConditionalPageMasterReference cpmr =
(ConditionalPageMasterReference)conditionalPageMasterRefs.get(i);
if (cpmr.isValid(isOddPage, isFirstPage, isBlankPage)) {
return cpmr.getMasterName();
}
}
return null;
}
/**
* Adds a new conditional page master reference.
* @param cpmr the new conditional reference
*/
public void addConditionalPageMasterReference(ConditionalPageMasterReference cpmr) {
this.conditionalPageMasterRefs.add(cpmr);
}
/**
* @see org.apache.fop.fo.pagination.SubSequenceSpecifier#reset()
*/
public void reset() {
this.numberConsumed = 0;
}
public void acceptVisitor(FOTreeVisitor fotv) {
fotv.serveRepeatablePageMasterAlternatives(this);
}
}
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