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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;
// Java
import java.util.List;
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-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 {
// The value of properties relevant for fo:repeatable-page-master-alternatives.
private Property maximumRepeats;
// End of property values
private static final int INFINITE = -1;
private int numberConsumed = 0;
private List conditionalPageMasterRefs;
private boolean hasPagePositionLast = false;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public RepeatablePageMasterAlternatives(FONode parent) {
super(parent);
}
/**
* {@inheritDoc}
*/
public void bind(PropertyList pList) throws FOPException {
maximumRepeats = pList.get(PR_MAXIMUM_REPEATS);
}
/**
* {@inheritDoc}
*/
protected void startOfNode() throws FOPException {
conditionalPageMasterRefs = new java.util.ArrayList();
if (parent.getName().equals("fo:page-sequence-master")) {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster)parent;
pageSequenceMaster.addSubsequenceSpecifier(this);
} else {
throw new ValidationException("fo:repeatable-page-master-alternatives "
+ "must be child of fo:page-sequence-master, not "
+ parent.getName(), locator);
}
}
/**
* {@inheritDoc}
*/
protected void endOfNode() throws FOPException {
if (firstChild == null) {
missingChildElementError("(conditional-page-master-reference+)");
}
}
/**
* {@inheritDoc}
XSL/FOP: (conditional-page-master-reference+)
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
if (!(FO_URI.equals(nsURI)
&& localName.equals("conditional-page-master-reference"))) {
invalidChildError(loc, nsURI, localName);
}
}
/** @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) {
log.debug("negative maximum-repeats: "
+ this.maximumRepeats);
mr = 0;
}
return mr;
}
}
/**
* 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 isLastPage,
boolean isBlankPage) {
if (getMaximumRepeats() != INFINITE) {
if (numberConsumed < getMaximumRepeats()) {
numberConsumed++;
} else {
return null;
}
} else {
numberConsumed++;
}
for (int i = 0; i < conditionalPageMasterRefs.size(); i++) {
ConditionalPageMasterReference cpmr
= (ConditionalPageMasterReference)conditionalPageMasterRefs.get(i);
if (cpmr.isValid(isOddPage, isFirstPage, isLastPage, isBlankPage)) {
return cpmr.getMasterReference();
}
}
return null;
}
/**
* Adds a new conditional page master reference.
* @param cpmr the new conditional reference
*/
public void addConditionalPageMasterReference(ConditionalPageMasterReference cpmr) {
this.conditionalPageMasterRefs.add(cpmr);
if (cpmr.getPagePosition() == EN_LAST) {
this.hasPagePositionLast = true;
}
}
/** {@inheritDoc} */
public void reset() {
this.numberConsumed = 0;
}
/** {@inheritDoc} */
public boolean goToPrevious() {
if (numberConsumed == 0) {
return false;
} else {
numberConsumed--;
return true;
}
}
/** {@inheritDoc} */
public boolean hasPagePositionLast() {
return this.hasPagePositionLast;
}
/** {@inheritDoc} */
public String getLocalName() {
return "repeatable-page-master-alternatives";
}
/** {@inheritDoc} */
public int getNameId() {
return FO_REPEATABLE_PAGE_MASTER_ALTERNATIVES;
}
}
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