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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.layoutmgr.BlockLevelEventProducer;
/**
* Class modelling the <a href="http://www.w3.org/TR/xsl/#fo_single-page-master-reference">
* <code>fo:single-page-master-reference</code></a> object.
* This is a reference for a single page. It returns the
* master name only once until reset.
*/
public class SinglePageMasterReference extends FObj
implements SubSequenceSpecifier {
// The value of properties relevant for fo:single-page-master-reference.
private String masterReference;
// The simple page master referenced
private SimplePageMaster master;
// End of property values
private static final int FIRST = 0;
private static final int DONE = 1;
private int state;
/**
* Creates a new SinglePageMasterReference instance that is
* a child of the given {@link FONode}.
* @param parent {@link FONode} that is the parent of this object
*/
public SinglePageMasterReference(FONode parent) {
super(parent);
this.state = FIRST;
}
/** {@inheritDoc} */
public void bind(PropertyList pList) throws FOPException {
masterReference = pList.get(PR_MASTER_REFERENCE).getString();
if (masterReference == null || masterReference.equals("")) {
missingPropertyError("master-reference");
}
}
/** {@inheritDoc} */
protected void startOfNode() throws FOPException {
PageSequenceMaster pageSequenceMaster = (PageSequenceMaster) parent;
pageSequenceMaster.addSubsequenceSpecifier(this);
}
/**
* {@inheritDoc}
* <br>XSL Content Model: empty
*/
protected void validateChildNode(Locator loc, String nsURI, String localName)
throws ValidationException {
if (FO_URI.equals(nsURI)) {
invalidChildError(loc, nsURI, localName);
}
}
/** {@inheritDoc} */
public SimplePageMaster getNextPageMaster(boolean isOddPage,
boolean isFirstPage,
boolean isLastPage,
boolean isBlankPage) {
if (this.state == FIRST) {
this.state = DONE;
return master;
} else {
return null;
}
}
/** {@inheritDoc} */
public void reset() {
this.state = FIRST;
}
/** {@inheritDoc} */
public boolean goToPrevious() {
if (state == FIRST) {
return false;
} else {
this.state = FIRST;
return true;
}
}
/** {@inheritDoc} */
public boolean hasPagePositionLast() {
return false;
}
/** {@inheritDoc} */
public boolean hasPagePositionOnly() {
return false;
}
/** {@inheritDoc} */
public String getLocalName() {
return "single-page-master-reference";
}
/**
* {@inheritDoc}
* @return {@link org.apache.fop.fo.Constants#FO_SINGLE_PAGE_MASTER_REFERENCE}
*/
public int getNameId() {
return FO_SINGLE_PAGE_MASTER_REFERENCE;
}
/** {@inheritDoc} */
public void resolveReferences(LayoutMasterSet layoutMasterSet) throws ValidationException {
master = layoutMasterSet.getSimplePageMaster(masterReference);
if (master == null) {
BlockLevelEventProducer.Provider.get(
getUserAgent().getEventBroadcaster())
.noMatchingPageMaster(this, parent.getName(), masterReference, getLocator());
}
}
/** {@inheritDoc} */
public boolean canProcess(String flowName) {
return master.getRegion(FO_REGION_BODY).getRegionName().equals(flowName);
}
/** {@inheritDoc} */
public boolean isInfinite() {
return false;
}
}
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