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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed 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.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
// FOP
import org.apache.fop.fo.FONode;
/**
* 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 PageMasterReference {
private static final int INFINITE = -1;
private PageSequenceMaster pageSequenceMaster;
private int maximumRepeats;
private int numberConsumed = 0;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public RepeatablePageMasterReference(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
* XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws SAXParseException {
invalidChildError(loc, nsURI, localName);
}
/**
* @see org.apache.fop.fo.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws SAXParseException {
super.addProperties(attlist);
String mr = getPropString(PR_MAXIMUM_REPEATS);
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 SAXParseException("Invalid number for "
+ "'maximum-repeats' property", locator);
}
}
}
/**
* @see org.apache.fop.fo.pagination.SubSequenceSpecifier
*/
public String getNextPageMasterName(boolean isOddPage,
boolean isFirstPage,
boolean isEmptyPage) {
if (maximumRepeats != INFINITE) {
if (numberConsumed < maximumRepeats) {
numberConsumed++;
} else {
return null;
}
}
return getMasterName();
}
/**
* @see org.apache.fop.fo.pagination.SubSequenceSpecifier#reset()
*/
public void reset() {
this.numberConsumed = 0;
}
public String getName() {
return "fo:repeatable-page-master-reference";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_REPEATABLE_PAGE_MASTER_REFERENCE;
}
}
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