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/*
* $Id$
* Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
* For details on use and redistribution please refer to the
* LICENSE file included with these sources.
*/
package org.apache.fop.fo.flow;
// FOP
import org.apache.fop.fo.*;
import org.apache.fop.layout.*;
import org.apache.fop.apps.FOPException;
import org.apache.fop.fo.properties.*;
import org.apache.fop.messaging.*;
// Java
import java.util.Enumeration;
import java.util.Vector;
public class Footnote extends FObj {
public static class Maker extends FObj.Maker {
public FObj make(FObj parent,
PropertyList propertyList) throws FOPException {
return new Footnote(parent, propertyList);
}
}
public static FObj.Maker maker() {
return new Footnote.Maker();
}
public Footnote(FObj parent,
PropertyList propertyList) throws FOPException {
super(parent, propertyList);
this.name = "fo:footnote";
}
public Status layout(Area area) throws FOPException {
FONode inline = null;
FONode fbody = null;
if (this.marker == START) {
this.marker = 0;
}
int numChildren = this.children.size();
for (int i = this.marker; i < numChildren; i++) {
FONode fo = (FONode)children.elementAt(i);
if (fo instanceof Inline) {
inline = fo;
Status status = fo.layout(area);
if (status.isIncomplete()) {
return status;
}
} else if (inline != null && fo instanceof FootnoteBody) {
// add footnote to current page or next if it can't fit
fbody = fo;
if (area instanceof BlockArea) {
((BlockArea)area).addFootnote((FootnoteBody)fbody);
} else {
Page page = area.getPage();
layoutFootnote(page, (FootnoteBody)fbody, area);
}
}
}
if (fbody == null) {
log.error("no footnote-body in footnote");
}
if (area instanceof BlockArea) {}
return new Status(Status.OK);
}
public static boolean layoutFootnote(Page p, FootnoteBody fb, Area area) {
try {
BodyAreaContainer bac = p.getBody();
AreaContainer footArea = bac.getFootnoteReferenceArea();
footArea.setIDReferences(bac.getIDReferences());
int basePos = footArea.getCurrentYPosition()
- footArea.getHeight();
int oldHeight = footArea.getHeight();
if (area != null) {
footArea.setMaxHeight(area.getMaxHeight() - area.getHeight()
+ footArea.getHeight());
} else {
footArea.setMaxHeight(bac.getMaxHeight()
+ footArea.getHeight());
}
Status status = fb.layout(footArea);
if (status.isIncomplete()) {
// add as a pending footnote
return false;
} else {
if (area != null) {
area.setMaxHeight(area.getMaxHeight()
- footArea.getHeight() + oldHeight);
}
// bac.setMaxHeight(bac.getMaxHeight() - footArea.getHeight() + oldHeight);
if (bac.getFootnoteState() == 0) {
Area ar = bac.getMainReferenceArea();
decreaseMaxHeight(ar, footArea.getHeight() - oldHeight);
footArea.setYPosition(basePos + footArea.getHeight());
}
}
} catch (FOPException fope) {
return false;
}
return true;
}
protected static void decreaseMaxHeight(Area ar, int change) {
ar.setMaxHeight(ar.getMaxHeight() - change);
Vector childs = ar.getChildren();
for (Enumeration en = childs.elements(); en.hasMoreElements(); ) {
Object obj = en.nextElement();
if (obj instanceof Area) {
Area childArea = (Area)obj;
decreaseMaxHeight(childArea, change);
}
}
}
}
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