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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;
// Java
import java.util.ArrayList;
// XML
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXParseException;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.PropertyList;
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;
/**
* 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.FObj#bind(PropertyList)
*/
public void bind(PropertyList pList) {
maximumRepeats = pList.get(PR_MAXIMUM_REPEATS);
}
/**
* @see org.apache.fop.fo.FONode#startOfNode
*/
protected void startOfNode() throws SAXParseException {
conditionalPageMasterRefs = new ArrayList();
if (parent.getName().equals("fo:page-sequence-master")) {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster)parent;
pageSequenceMaster.addSubsequenceSpecifier(this);
} else {
throw new SAXParseException("fo:repeatable-page-master-alternatives "
+ "must be child of fo:page-sequence-master, not "
+ parent.getName(), locator);
}
}
/**
* @see org.apache.fop.fo.FONode#endOfNode
*/
protected void endOfNode() throws SAXParseException {
if (childNodes == null) {
missingChildElementError("(conditional-page-master-reference+)");
}
}
/**
* @see org.apache.fop.fo.FONode#validateChildNode(Locator, String, String)
XSL/FOP: (conditional-page-master-reference+)
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws SAXParseException {
if (!(nsURI == FO_URI &&
localName.equals("conditional-page-master-reference"))) {
invalidChildError(loc, nsURI, localName);
}
}
/**
* Return the "maximum-repeats" property.
*/
public int getMaximumRepeats() {
if (maximumRepeats.getEnum() == 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.FObj#addProperties
*/
protected void addProperties(Attributes attlist) throws SAXParseException {
super.addProperties(attlist);
conditionalPageMasterRefs = new ArrayList();
if (parent.getName().equals("fo:page-sequence-master")) {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster)parent;
pageSequenceMaster.addSubsequenceSpecifier(this);
} else {
throw new SAXParseException("fo:repeatable-page-master-alternatives "
+ "must be child of fo:page-sequence-master, not "
+ parent.getName(), locator);
}
Property mr = getProperty(PR_MAXIMUM_REPEATS);
if (mr.getEnum() == NO_LIMIT) {
this._maximumRepeats = INFINITE;
} else {
this._maximumRepeats = mr.getNumber().intValue();
if (this._maximumRepeats < 0) {
getLogger().debug("negative maximum-repeats: "
+ this.maximumRepeats);
this._maximumRepeats = 0;
}
}
}
/**
* 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 String getName() {
return "fo:repeatable-page-master-alternatives";
}
/**
* @see org.apache.fop.fo.FObj#getNameId()
*/
public int getNameId() {
return FO_REPEATABLE_PAGE_MASTER_ALTERNATIVES;
}
}
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