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/*-- $Id$ --
============================================================================
The Apache Software License, Version 1.1
============================================================================
Copyright (C) 1999 The Apache Software Foundation. All rights reserved.
Redistribution and use in source and binary forms, with or without modifica-
tion, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. The end-user documentation included with the redistribution, if any, must
include the following acknowledgment: "This product includes software
developed by the Apache Software Foundation (http://www.apache.org/)."
Alternately, this acknowledgment may appear in the software itself, if
and wherever such third-party acknowledgments normally appear.
4. The names "Fop" and "Apache Software Foundation" must not be used to
endorse or promote products derived from this software without prior
written permission. For written permission, please contact
apache@apache.org.
5. Products derived from this software may not be called "Apache", nor may
"Apache" appear in their name, without prior written permission of the
Apache Software Foundation.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This software consists of voluntary contributions made by many individuals
on behalf of the Apache Software Foundation and was originally created by
James Tauber <jtauber@jtauber.com>. For more information on the Apache
Software Foundation, please see <http://www.apache.org/>.
*/
package org.apache.fop.fo;
// FOP
import org.apache.fop.apps.FOPException;
import org.apache.fop.layout.Area;
// Java
import java.util.Vector;
/**
* base class for nodes in the formatting object tree
*/
abstract public class FONode {
protected FObj parent;
protected Vector children = new Vector();
/** value of marker before layout begins */
public final static int START = -1000;
/** value of marker after break-after */
public final static int BREAK_AFTER = -1001;
/**
* where the layout was up to.
* for FObjs it is the child number
* for FOText it is the character number
*/
protected int marker = START;
protected boolean isInLabel = false;
protected boolean isInListBody = false;
protected boolean isInTableCell = false;
protected int bodyIndent;
protected int distanceBetweenStarts;
protected int labelSeparation;
protected int forcedStartOffset = 0;
protected int forcedWidth = 0;
protected FONode(FObj parent) {
this.parent = parent;
}
public void setIsInLabel() {
this.isInLabel = true;
}
public void setIsInListBody() {
this.isInListBody = true;
}
public void setIsInTableCell() {
this.isInTableCell = true;
}
public void setDistanceBetweenStarts(int distance) {
this.distanceBetweenStarts = distance;
}
public void setLabelSeparation(int separation) {
this.labelSeparation = separation;
}
public void setBodyIndent(int indent) {
this.bodyIndent = indent;
}
public void forceStartOffset(int offset) {
this.forcedStartOffset = offset;
}
public void forceWidth(int width) {
this.forcedWidth = width;
}
public void resetMarker() {
this.marker = START;
int numChildren = this.children.size();
for (int i = 0; i < numChildren; i++) {
((FONode) children.elementAt(i)).resetMarker();
}
}
protected void addChild(FONode child) {
children.addElement(child);
}
public FObj getParent() {
return this.parent;
}
/* status */
/* layout was fully completed */
public final static int OK = 1;
/* none of the formatting object could be laid out because the
containing area was full (end of page) */
public final static int AREA_FULL_NONE = 2;
/* some of the formatting object could not be laid out because the
containing area was full (end of page) */
public final static int AREA_FULL_SOME = 3;
/* force page break */
public final static int FORCE_PAGE_BREAK = 4;
public final static int FORCE_PAGE_BREAK_EVEN = 5;
public final static int FORCE_PAGE_BREAK_ODD = 6;
abstract public int layout(Area area)
throws FOPException;
}
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