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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.fo.pagination;
// XML
import org.xml.sax.Locator;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.ValidationException;
import org.apache.fop.fo.properties.Property;
/**
* A repeatable-page-master-reference formatting object.
* This handles a reference with a specified number of repeating
* instances of the referenced page master (may have no limit).
*/
public class RepeatablePageMasterReference extends FObj
implements SubSequenceSpecifier {
// The value of properties relevant for fo:repeatable-page-master-reference.
private String masterReference;
private Property maximumRepeats;
// End of property values
private static final int INFINITE = -1;
private int numberConsumed = 0;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public RepeatablePageMasterReference(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FObj#bind(PropertyList)
*/
public void bind(PropertyList pList) throws FOPException {
masterReference = pList.get(PR_MASTER_REFERENCE).getString();
maximumRepeats = pList.get(PR_MAXIMUM_REPEATS);
if (masterReference == null || masterReference.equals("")) {
missingPropertyError("master-reference");
}
}
/**
* @see org.apache.fop.fo.FONode#startOfNode
*/
protected void startOfNode() throws FOPException {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster) parent;
if (masterReference == null) {
missingPropertyError("master-reference");
} else {
pageSequenceMaster.addSubsequenceSpecifier(this);
}
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
invalidChildError(loc, nsURI, localName);
}
/**
* @see org.apache.fop.fo.pagination.SubSequenceSpecifier
*/
public String getNextPageMasterName(boolean isOddPage,
boolean isFirstPage,
boolean isLastPage,
boolean isEmptyPage) {
if (getMaximumRepeats() != INFINITE) {
if (numberConsumed < getMaximumRepeats()) {
numberConsumed++;
} else {
return null;
}
}
return masterReference;
}
/** @return the "maximum-repeats" property. */
public int getMaximumRepeats() {
if (maximumRepeats.getEnum() == EN_NO_LIMIT) {
return INFINITE;
} else {
int mr = maximumRepeats.getNumeric().getValue();
if (mr < 0) {
getLogger().debug("negative maximum-repeats: "
+ this.maximumRepeats);
mr = 0;
}
return mr;
}
}
/** @see org.apache.fop.fo.pagination.SubSequenceSpecifier#reset() */
public void reset() {
this.numberConsumed = 0;
}
/** @see org.apache.fop.fo.pagination.SubSequenceSpecifier#goToPrevious() */
public boolean goToPrevious() {
if (numberConsumed == 0) {
return false;
} else {
numberConsumed--;
return true;
}
}
/** @see org.apache.fop.fo.pagination.SubSequenceSpecifier#hasPagePositionLast() */
public boolean hasPagePositionLast() {
return false;
}
/** @see org.apache.fop.fo.FONode#getLocalName() */
public String getLocalName() {
return "repeatable-page-master-reference";
}
/** @see org.apache.fop.fo.FObj#getNameId() */
public int getNameId() {
return FO_REPEATABLE_PAGE_MASTER_REFERENCE;
}
}
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