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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.Iterator;
import java.util.Map;
// XML
import org.xml.sax.Attributes;
// FOP
import org.apache.fop.fo.FONode;
import org.apache.fop.fo.FObj;
import org.apache.fop.fo.FOTreeVisitor;
import org.apache.fop.apps.FOPException;
/**
* The layout-master-set formatting object.
* This class maintains the set of simple page master and
* page sequence masters.
* The masters are stored so that the page sequence can obtain
* the required page master to create a page.
* The page sequence masters can be reset as they hold state
* information for a page sequence.
*/
public class LayoutMasterSet extends FObj {
private Map simplePageMasters;
private Map pageSequenceMasters;
/**
* @see org.apache.fop.fo.FONode#FONode(FONode)
*/
public LayoutMasterSet(FONode parent) {
super(parent);
}
/**
* @see org.apache.fop.fo.FONode#handleAttrs(Attributes)
*/
public void handleAttrs(Attributes attlist) throws FOPException {
super.handleAttrs(attlist);
if (parent.getName().equals("fo:root")) {
Root root = (Root)parent;
root.setLayoutMasterSet(this);
} else {
throw new FOPException("fo:layout-master-set must be child of fo:root, not "
+ parent.getName());
}
this.simplePageMasters = new java.util.HashMap();
this.pageSequenceMasters = new java.util.HashMap();
}
/**
* Add a simple page master.
* The name is checked to throw an error if already added.
* @param simplePageMaster simple-page-master to add
* @throws FOPException if there's a problem with name uniqueness
*/
protected void addSimplePageMaster(SimplePageMaster simplePageMaster)
throws FOPException {
// check against duplication of master-name
if (existsName(simplePageMaster.getMasterName())) {
throw new FOPException("'master-name' ("
+ simplePageMaster.getMasterName()
+ ") must be unique "
+ "across page-masters and page-sequence-masters");
}
this.simplePageMasters.put(simplePageMaster.getMasterName(),
simplePageMaster);
}
/**
* Get a simple page master by name.
* This is used by the page sequence to get a page master for
* creating pages.
* @param masterName the name of the page master
* @return the requested simple-page-master
*/
public SimplePageMaster getSimplePageMaster(String masterName) {
return (SimplePageMaster)this.simplePageMasters.get(masterName);
}
/**
* Add a page sequence master.
* The name is checked to throw an error if already added.
* @param masterName name for the master
* @param pageSequenceMaster PageSequenceMaster instance
* @throws FOPException if there's a problem with name uniqueness
*/
protected void addPageSequenceMaster(String masterName,
PageSequenceMaster pageSequenceMaster)
throws FOPException {
// check against duplication of master-name
if (existsName(masterName)) {
throw new FOPException("'master-name' (" + masterName
+ ") must be unique "
+ "across page-masters and page-sequence-masters");
}
this.pageSequenceMasters.put(masterName, pageSequenceMaster);
}
/**
* Get a page sequence master by name.
* This is used by the page sequence to get a page master for
* creating pages.
* @param masterName name of the master
* @return the requested PageSequenceMaster instance
*/
public PageSequenceMaster getPageSequenceMaster(String masterName) {
return (PageSequenceMaster)this.pageSequenceMasters.get(masterName);
}
private boolean existsName(String masterName) {
if (simplePageMasters.containsKey(masterName)
|| pageSequenceMasters.containsKey(masterName)) {
return true;
} else {
return false;
}
}
/**
* Section 7.25.7: check to see that if a region-name is a
* duplicate, that it maps to the same fo region-class.
* @throws FOPException if there's a name duplication
*/
public void checkRegionNames() throws FOPException {
// (user-entered) region-name to default region map.
Map allRegions = new java.util.HashMap();
for (Iterator spm = simplePageMasters.values().iterator();
spm.hasNext();) {
SimplePageMaster simplePageMaster =
(SimplePageMaster)spm.next();
Map spmRegions = simplePageMaster.getRegions();
for (Iterator e = spmRegions.values().iterator();
e.hasNext();) {
Region region = (Region) e.next();
if (allRegions.containsKey(region.getRegionName())) {
String defaultRegionName =
(String) allRegions.get(region.getRegionName());
if (!defaultRegionName.equals(region.getDefaultRegionName())) {
throw new FOPException("Region-name ("
+ region.getRegionName()
+ ") is being mapped to multiple "
+ "region-classes ("
+ defaultRegionName + " and "
+ region.getDefaultRegionName()
+ ")");
}
}
allRegions.put(region.getRegionName(),
region.getDefaultRegionName());
}
}
}
/**
* Checks whether or not a region name exists in this master set.
* @param regionName name of the region
* @return true when the region name specified has a region in this LayoutMasterSet
*/
public boolean regionNameExists(String regionName) {
for (Iterator e = simplePageMasters.values().iterator();
e.hasNext();) {
if (((SimplePageMaster)e.next()).regionNameExists(regionName)) {
return true;
}
}
return false;
}
public void acceptVisitor(FOTreeVisitor fotv) {
fotv.serveLayoutMasterSet(this);
}
}
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