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package org.apache.xml.fop.fo;
// FOP
import org.apache.xml.fop.apps.FOPException;
import org.apache.xml.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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