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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.area;
import java.util.List;
import org.apache.fop.fo.pagination.RegionBody;
import org.apache.fop.traits.WritingModeTraitsGetter;
/**
* This class is a container for the areas that may be generated by
* an fo:region-body. It extends the RegionReference that is used
* directly by the other region classes.
* See fo:region-body definition in the XSL Rec for more information.
*/
public class BodyRegion extends RegionReference {
private static final long serialVersionUID = -1848872997724078080L;
private BeforeFloat beforeFloat; // optional
private MainReference mainReference; // mandatory
private Footnote footnote; // optional
private int columnGap;
private int columnCount;
/**
* Constructor which can read traits directly
* from an fo:region-body formatting object.
* @param rb the region-body FO node
* @param parent the parent region viewport
*/
public BodyRegion(RegionBody rb, RegionViewport parent) {
this(rb.getNameId(), rb.getRegionName(), parent, rb.getColumnCount(), rb.getColumnGap());
}
/**
* Constructor which can read traits directly
* from an fo:region-body formatting object.
* @param regionClass the region class (as returned by Region.getNameId())
* @param regionName the name of the region (as returned by Region.getRegionName())
* @param parent the parent region viewport
* @param columnCount the number of columns
* @param columnGap the gap between columns
*/
public BodyRegion(int regionClass, String regionName, RegionViewport parent,
int columnCount, int columnGap) {
super(regionClass, regionName, parent);
this.columnCount = columnCount;
this.columnGap = columnGap;
mainReference = new MainReference(this);
}
/**
* Get the number of columns when not spanning
*
* @return the number of columns
*/
public int getColumnCount() {
return this.columnCount;
}
/** @return the column-gap value */
public int getColumnGap() {
return this.columnGap;
}
/**
* Get the main reference area.
*
* @return the main reference area
*/
public MainReference getMainReference() {
return mainReference;
}
/**
* indicates whether the main reference area has any child areas added to it
*
* @return whether the main reference area has any child areas added to it
*/
public boolean isEmpty() {
return (mainReference == null || mainReference.isEmpty())
&& (footnote == null || footnote.isEmpty())
&& (beforeFloat == null || beforeFloat.isEmpty());
}
/**
* Get the before float area.
*
* @return the before float area
*/
public BeforeFloat getBeforeFloat() {
if (beforeFloat == null) {
beforeFloat = new BeforeFloat();
}
return beforeFloat;
}
/**
* Get the footnote area.
*
* @return the footnote area
*/
public Footnote getFootnote() {
if (footnote == null) {
footnote = new Footnote();
}
return footnote;
}
/**
* @return the available BPD in the main reference area after the previous span reference
* areas are subtracted.
*/
public int getRemainingBPD() {
int usedBPD = 0;
List<Span> spans = getMainReference().getSpans();
int previousSpanCount = spans.size() - 1;
for (int i = 0; i < previousSpanCount; i++) {
usedBPD += spans.get(i).getHeight();
}
return getBPD() - usedBPD;
}
/**
* Sets the writing mode traits for the main reference area of
* this body region area.
* @param wmtg a WM traits getter
*/
public void setWritingModeTraits(WritingModeTraitsGetter wmtg) {
if (getMainReference() != null) {
getMainReference().setWritingModeTraits(wmtg);
}
}
/** {@inheritDoc} */
public Object clone() throws CloneNotSupportedException {
BodyRegion br = (BodyRegion) super.clone();
br.mainReference = new MainReference(br);
br.mainReference.setSpans(mainReference.getSpans());
return br;
}
}
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